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159-447: Nutritionally, tofu is low in calories , while containing a relatively large amount of protein . It is high and reliable source of iron , and can have a high calcium or magnesium content depending on the coagulants (e.g. calcium chloride , calcium sulphate , magnesium sulphate ) used in manufacturing. Cultivation of tofu, as a protein-rich food source, has one of the lowest needs for land use (1.3 m²/ 1000 kcal) and emits some of

318-519: A staple in many countries, including Vietnam , Thailand , and Korea , with regional variations in production methods, texture, flavor, and usage. The most commonly held of the three theories of tofu's origin maintains that tofu was discovered by Liu An (179–122 BC), a Han dynasty prince. While plausible, the paucity of reliable sources for this period makes this difficult to conclusively determine. In Chinese history , important inventions were frequently attributed to important leaders and figures of

477-526: A 1770 letter to John Bartram . Franklin, who encountered it during a trip to London, included a few soybeans and referred to it as "cheese" from China. In 1770, Franklin also corresponded with James Flint on the subject of how the Chinese converted callivances (soybeans) into tofu. Flint's writing "Towfu" in his letter is the earliest documented use of "tofu" in the English language. The first tofu company in

636-411: A bureaucratic system that favored the land-holding class able to afford the best education. One of the greatest literary critics of this was the official and famous poet Su Shi . Yet Su was a product of his times, as the identity, habits, and attitudes of the scholar-official had become less aristocratic and more bureaucratic with the transition of the periods from Tang to Song. At the beginning of

795-618: A compass, first recorded description of the pound lock , and improved designs of astronomical clocks . Economically, the Song dynasty was unparalleled with a gross domestic product three times larger than that of Europe during the 12th century. China's population doubled in size between the 10th and 11th centuries. This growth was made possible by expanded rice cultivation , use of early-ripening rice from Southeast and South Asia, and production of widespread food surpluses. The Northern Song census recorded 20 million households, double that of

954-531: A denser and more aggregated gel network which disperses more light, resulting in tofu with a whiter appearance. Tofu flavor is generally described as bland, which is the taste desired by customers in North America. A more beany flavor is preferred in East Asia. The beany or bland taste is generated during the grinding and cooking process, and either a "hot grind" or a "cold grind" can be used to influence

1113-436: A departure from the earlier Tang dynasty (618–907), when the government strictly regulated commercial markets and local affairs; now the government withdrew heavily from regulating commerce and relied upon a mass of local gentry to perform necessary duties in their communities. The gentry distinguished themselves in society through their intellectual and antiquarian pursuits, while the homes of prominent landholders attracted

1272-640: A film or skin composed primarily of a soy protein-lipid complex on the liquid surface. The films are collected and dried into yellowish sheets known as "soy milk skin" ( 腐皮 , fǔpí in Chinese; 湯葉 , yuba in Japanese). Its approximate composition is 50–55% protein, 24–26% lipids (fat), 12% carbohydrate, 3% ash, and 9% moisture. The skin can also be dried into a product known as "tofu bamboo" ( 腐竹 , fǔzhú in Chinese; phù trúc in Vietnamese; kusatake , Japanese), or into many other shapes. Since tofu skin has

1431-657: A great effect on people's lives, beliefs, and daily activities, and Chinese literature on spirituality was popular. The major deities of Daoism and Buddhism , ancestral spirits , and the many deities of Chinese folk religion were worshipped with sacrificial offerings. Tansen Sen asserts that more Buddhist monks from India traveled to China during the Song than in the previous Tang dynasty (618–907). With many ethnic foreigners travelling to China to conduct trade or live permanently, there came many foreign religions; religious minorities in China included Middle Eastern Muslims ,

1590-412: A high level of suspicion by the judge. Due to costly court expenses and immediate jailing of those accused of criminal offenses, people in the Song preferred to settle disputes and quarrels privately, without the court's interference. Shen Kuo's Dream Pool Essays argued against traditional Chinese beliefs in anatomy (such as his argument for two throat valves instead of three); this perhaps spurred

1749-401: A high moisture content. It has the firmness of raw meat and bounces back readily when pressed. The texture of the inside of the tofu is similar to that of a firm custard. The skin of this form of tofu retains the pattern of the muslin used to drain it, and the outside is slightly more resistant to damage than the inside. It can be picked up easily with chopsticks. A very firm type of momen-dōfu

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1908-658: A high moisture content. Silken tofu is produced by coagulating soy milk without cutting the curd. Silken tofu is available in several consistencies, including soft and firm, but all silken tofu is more delicate than regular firm tofu (pressed tofu) and it has different culinary uses. Silken tofu can be used as a substitute for dairy products and eggs, especially for smoothies and baked desserts. Douhua ( 豆花 , also known as 豆腐花 , dòufuhuā in Chinese), or tofu brain ( 豆腐腦 or 豆腐脑 , dòufunǎo in Chinese) or dau fa (Cantonese) and tau hua (Fujianese) ( 豆花 ; "bean flower")

2067-618: A literary flourishing in the Song period, which saw the publication of several major classical koan collections which remain influential in Zen philosophy and practice to the present day. A true revival of Buddhism in Chinese society would not occur until the Mongol rule of the Yuan dynasty, with Kublai Khan's sponsorship of Tibetan Buddhism and Drogön Chögyal Phagpa as the leading lama . The Christian sect of Nestorianism , which had entered China in

2226-461: A lower social tier than men according to Confucian ethics, they enjoyed many social and legal privileges and wielded considerable power at home and in their own small businesses. As Song society became more and more prosperous and parents on the bride's side of the family provided larger dowries for her marriage, women naturally gained many new legal rights in ownership of property. Under certain circumstances, an unmarried daughter without brothers, or

2385-503: A million a century later. This economic power also heavily influenced foreign economies abroad. In 1120 alone, the Song government collected 18,000,000 ounces (510,000 kg) of silver in taxes. The Moroccan geographer al-Idrisi wrote in 1154 of the prowess of Chinese merchant ships in the Indian Ocean and of their annual voyages that brought iron, swords, silk, velvet, porcelain, and various textiles to places such as Aden ( Yemen ),

2544-600: A new organization of classic texts that established the doctrine of Neo-Confucianism . Although civil service examinations had existed since the Sui dynasty , they became much more prominent in the Song period. Officials gaining power through imperial examination led to a shift from a military-aristocratic elite to a scholar-bureaucratic elite. After usurping the throne of the Later Zhou dynasty , Emperor Taizu of Song ( r.  960–976 ) spent sixteen years conquering

2703-456: A philosophical point. Although an early form of the local geographic gazetteer existed in China since the 1st century, the matured form known as "treatise on a place", or fangzhi , replaced the old "map guide", or transl.  zho  – transl.  tujing , during the Song dynasty. The imperial courts of the emperor's palace were filled with his entourage of court painters, calligraphers, poets, and storytellers. Emperor Huizong

2862-399: A raid on Guangxi , the Song commander Guo Kui (1022–1088) penetrated as far as Thăng Long (modern Hanoi ). Heavy losses on both sides prompted the Vietnamese commander Thường Kiệt (1019–1105) to make peace overtures, allowing both sides to withdraw from the war effort; captured territories held by both Song and Vietnamese were mutually exchanged in 1082, along with prisoners of war. During

3021-468: A role in producing the desired texture in the finished tofu. Different textures result from different pore sizes and other microscopic features in the tofu produced using each coagulant. The coagulant mixture is dissolved in water, and the solution is then stirred into boiled soy milk until the mixture curdles into a soft gel . Coagulants are typically added at concentrations between 1.5 and 5.0 g/kg. In all coagulants consisting of calcium or magnesium salts,

3180-424: A small scale during the Sui and Tang dynasties, but by the Song period, it became virtually the only means for drafting officials into the government. The advent of widespread printing helped to widely circulate Confucian teachings and to educate more and more eligible candidates for the exams. This can be seen in the number of exam takers for the low-level prefectural exams rising from 30,000 annual candidates in

3339-532: A soft cake. Firmer tofus, such as East Asian dry tofu ( 豆 干 ' in Chinese or 凍み豆腐 Shimi-dōfu in Japanese) or Western types of tofu, are further pressed to remove even more liquid. In Vietnam, the curd is strained and molded in a square mold, and the end product is called đậu khuôn (molded bean) or đậu phụ (one of the Vietnamese ways to pronounce the Chinese dòufu ). The tofu curds are allowed to cool and become firm. The finished tofu can then be cut into pieces, flavored or further processed. Although tartness

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3498-446: A soft yet rubbery texture, it can be folded or shaped into different forms and cooked further to imitate meat in vegan cuisine. Some factories dedicate their production to tofu skin and other soy membrane products. Tofu skin is commonly sold in the form of dried leaves or sheets. Other people would put the "tofu bamboo" into congee (a watery rice mixture that is eaten for breakfast) so that the congee becomes more silky and smooth, and gives

3657-432: A structural change to the gel network and lead to an increase in textural properties such as hardness, springiness, cohesiveness, and gumminess. In Japan, two kinds of freeze-dried tofu are produced. Those are usually rehydrated by being soaked in water prior to consumption. In their dehydrated state, they do not require refrigeration. Tofu skin is produced when soy milk is boiled in an open, shallow pan, thus producing

3816-541: A surviving mother without sons, could inherit one-half of her father's share of undivided family property. There were many notable and well-educated women, and it was a common practice for women to educate their sons during their earliest youth. The mother of the scientist, general, diplomat, and statesman Shen Kuo taught him essentials of military strategy. There were also exceptional women writers and poets, such as Li Qingzhao (1084–1151), who became famous even in her lifetime. Religion in China during this period had

3975-588: A tribute to Song. Champa rice was drought-resistant and able to grow fast enough to offer two harvests a year instead of one. Song restaurant and tavern menus are recorded. They list entrees for feasts, banquets, festivals, and carnivals. They reveal a diverse and lavish diet for those of the upper class. They could choose from a wide variety of meats and seafood, including shrimp, geese, duck, mussel, shellfish, fallow deer , hare, partridge, pheasant, francolin, quail, fox, badger, clam, crab, and many others. Dairy products were rare in Chinese cuisine at this time. Beef

4134-454: A type of tofu, but rather a type of food in its own right. Some variation exists among soft tofus. Black douhua ( 黑豆花 , hēidòuhuā) is a type of silken tofu made from black soybeans, which is usually made into dòuhuā ( 豆 花 ) rather than firm or dry tofu. The texture of black bean tofu is slightly more gelatinous than regular douhua and the color is greyish in tone. This type of tofu is eaten for its earthy "black bean taste". Edamame tofu

4293-515: A variety of courtiers , including artisans, artists, educational tutors, and entertainers. Despite the disdain for trade, commerce, and the merchant class exhibited by the highly cultured and elite exam-drafted scholar-officials, commercialism played a prominent role in Song culture and society. A scholar-official would be frowned upon by his peers if he pursued means of profiteering outside of his official salary; however, this did not stop many scholar-officials from managing business relations through

4452-570: A whole new texture. Also, soft, fragile skin would be on the congee once it cools down.Tofu skin is cooked with noodles. Okara , from the Japanese 雪花菜(おから) is known as 雪花菜 xuěhuācài , in Chinese , lit. "snowflake vegetable"; 豆腐渣 , dòufuzhā , also Chinese , lit. "tofu sediment/residue"; and 콩비지 , kongbiji , in Korean ). Sometimes known in the west as "soy pulp" or "tofu lees", okara

4611-399: Is 4184 J or 4.184 kJ. The term "calorie" comes from Latin calor  'heat'. It was first introduced by Nicolas Clément , as a unit of heat energy, in lectures on experimental calorimetry during the years 1819–1824. This was the "large" calorie. The term (written with lowercase "c") entered French and English dictionaries between 1841 and 1867. The same term

4770-743: Is a Japanese variety of kinugoshi tōfu made from edamame (fresh green soybeans); it is pale green in color and often studded with whole edamame . Depending on the amount of water that is extracted from the cut and pressed curds two types of tofu are produced: firm, and extra firm. Fresh tofu is usually sold completely immersed in water to maintain its moisture content and freshness, and to suppress bacterial growth. Firm tofu (called 老豆腐 lǎodòufu in Chinese; 木綿豆腐 , momen-dōfu in Japanese, "cotton tofu"; 모두부 , mo-dubu in Korean): Although drained and pressed, this form of fresh tofu retains

4929-408: Is a popular breakfast dish across China. In Malaysia, douhua is usually served warm with white or dark palm sugar syrup, or served cold with longans . It is frequently served at breakfast or for dessert. It is usually served either with a sweet ginger syrup, or a mushroom gravy called da lu ( 打卤 ). It's normally coagulated at the restaurant into a serving container. Douhua is not always considered

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5088-461: Is a tofu by-product consisting of the fiber, protein, and starch left over when soy milk has been extracted from ground soaked soybeans. It is often used as animal feed in most tofu-producing cultures, but also has other uses in Japanese and Korean cuisines, such as in the Korean stew kongbiji jjigae ( 콩비지찌개 ). It is also an ingredient for vegetarian burgers in many Western nations. In Japan , it

5247-428: Is called jun-tōfu ( 純豆腐 ) or sundubu ( スンドゥブ ). Soft tofu, also known as "silken tofu", is called nèndòufu ( 嫩豆腐 ; "soft tofu") or huádòufu ( 滑豆腐 , "smooth tofu") in Chinese ; kinugoshi-dōfu ( 絹漉し豆腐 ; "silk-filtered tofu") in Japanese ; and yeon-dubu ( Korean :  연두부 ; Hanja :  軟豆腐 ; "soft tofu") in Korean . Gelled with gypsum, this tofu is undrained, and unpressed, and contains

5406-736: Is called tahu in Indonesia, and Indonesian dishes such as tahu sumbat, taugeh tahu, asinan , siomay and some curries, often add slices of tofu. Tahu goreng , tahu isi and tahu sumedang are popular fried tofu snacks. Tofu is called tauhu in Malaysia and Singapore. Malaysian and Singaporean Indians use tofu in their cuisine, such as in Indian mee goreng , and rojak pasembor. Peranakan cuisine often uses tofu, as in Penang curry noodles and laksa . Indonesia, Thailand, Malaysia, and

5565-642: Is eaten in parts of Japan, called ishi-dōfu (石豆腐, "stone tofu") in parts of Ishikawa , or iwa-dōfu (岩豆腐, "rock tofu") in Gokayama in the Toyama Prefecture and in Iya in the prefecture of Tokushima . These types of firm tofu are produced with seawater instead of nigari ( magnesium chloride ), or using concentrated soy milk . Some of them are squeezed using heavy weights to eliminate excess moisture. These products are produced in areas where traveling

5724-414: Is gelled with bittern ( magnesium chloride ) solution or a suspension of gypsum ( calcium sulphate ), different types of unpressed tofu are produced. Gypsum-gelled soft tofu has a smooth and gel-like texture and is commonly known as soft tofu, silken-tofu, or douhua ( 豆花 ). The bittern-gelled variety has a very soft spongy curdled texture and is known as extra-soft or sun-dubu ( 순두부 ). Unpressed tofu

5883-505: Is inconvenient, such as remote islands, mountain villages, and heavy snowfall areas. Dòugān ( 豆干 , literally "dry tofu" in Chinese) or su ji ( 素鸡 , vegetarian chicken) is an extra firm variety of tofu where a large proportion of the liquid has been pressed out. Dòugān contains the least moisture of all fresh tofu, the firmness of fully cooked meat, and a somewhat rubbery feel similar to that of paneer . When sliced thinly this tofu can be crumbled easily. The skin of this form of tofu has

6042-464: Is increasingly being superseded by the SI unit, the joule (J); and metric multiples thereof, such as the kilojoule (kJ). The lingering use in chemistry is largely due to the fact that the energy released by a reaction in aqueous solution , expressed in kilocalories per mole of reagent, is numerically close to the concentration of the reagent in moles per liter multiplied by the change in the temperature of

6201-484: Is most commonly used to express food energy , namely the specific energy (energy per mass) of metabolizing different types of food. For example, fat (triglyceride lipids) contains 9 kilocalories per gram (kcal/g), while carbohydrates (sugar and starch) and protein contain approximately 4 kcal/g. Alcohol in food contains 7 kcal/g. The "large" unit is also used to express recommended nutritional intake or consumption, as in "calories per day". Dieting

6360-485: Is regarded as obsolete, having been replaced in many uses by the SI derived unit of energy , the joule (J), or the kilojoule (kJ) for 1000 joules. The precise equivalence between calories and joules has varied over the years, but in thermochemistry and nutrition it is now generally assumed that one (small) calorie ( thermochemical calorie ) is equal to exactly 4.184 J, and therefore one kilocalorie (one large calorie)

6519-465: Is similar to silken tofu, but is typically served a few hours after it is prepared. It is most often eaten as a hot dessert, but sometimes salty pickles or hot sauce are added. This is a type of soft tofu with very high moisture content. Because using chopsticks make douhua difficult to pick up, it is generally eaten with a spoon. With the addition of flavorings such as finely chopped spring onions , dried shrimp , soy sauce , or chilli sauce , douhua

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6678-403: Is so soft that it is directly ladled out for serving or sold with its gelling container. Unpressed bittern -gelled soft tofu is called sun-dubu ( 순두부 ; "mild tofu") in Korean . Soy milk is mixed with seawater , or saline water made with sea salt , so that it curdles. The curds remain loose and soft. Freshly made sun-dubu is eaten boiled with little or no seasoning. Manufactured sundubu

6837-417: Is sometimes desired in dessert tofu, the acid used in flavoring is usually not the primary coagulant, since concentrations sufficiently high to induce coagulation negatively affect the flavor or texture of the resulting tofu. A sour taste in tofu and a slight cloudiness in its storing liquid is also usually an indication of bacterial growth and, hence, spoilage. The whiteness of tofu is ultimately determined by

6996-404: Is the practice of eating food in a regulated way to decrease, maintain, or increase body weight , or to prevent and treat diseases such as diabetes and obesity . As weight loss depends on reducing caloric intake, different kinds of calorie-reduced diets have been shown to be generally effective. In other scientific contexts, the term "calorie" and the symbol "cal" almost always refers to

7155-406: Is used to make ice cream . Calorie The calorie is a unit of energy that originated from the caloric theory of heat. The large calorie , food calorie , dietary calorie , or kilogram calorie is defined as the amount of heat needed to raise the temperature of one liter of water by one degree Celsius (or one kelvin ). The small calorie or gram calorie is defined as

7314-480: Is usually sold in tubes. It is also the main ingredient in sundubu-jjigae ( 순두부찌개 ; "soft tofu stew"). Although the word sun in sun-dubu does not have a Sino-Korean origin , sun-dubu is often translated into Chinese and Japanese using the Chinese character 純 , whose Korean pronunciation is sun and the meaning is "pure". Thus in China, sun-dubu is called chún dòufu ( 純豆腐 ; "pure tofu"), and in Japan, it

7473-516: The Eighteen Songs of a Nomad Flute from the life story of Cai Wenji (b. 177). This art project was a diplomatic gesture to the Jin dynasty while he negotiated for the release of his mother from Jurchen captivity in the north. In philosophy, Chinese Buddhism had waned in influence but it retained its hold on the arts and on the charities of monasteries. Buddhism had a profound influence upon

7632-648: The 15 °C calorie and the thermochemical calorie . Until 1948, the latter was defined as 4.1833 international joules; the current standard of 4.184 J was chosen to have the new thermochemical calorie represent the same quantity of energy as before. In the United States , in a nutritional context, the "large" unit is used almost exclusively. It is generally written "calorie" with lowercase "c" and symbol "cal", even in government publications. The SI unit kilojoule (kJ) may be used instead, in legal or scientific contexts. Most American nutritionists prefer

7791-860: The Fatimid Caliphate of Egypt, Srivijaya , the Kara-Khanid Khanate in Central Asia , the Goryeo Kingdom in Korea, and other countries that were also trade partners with Japan . Chinese records even mention an embassy from the ruler of "Fu lin" (拂菻, i.e. the Byzantine Empire ), Michael VII Doukas , and its arrival in 1081. However, China's closest neighbouring states had the greatest impact on its domestic and foreign policy. From its inception under Taizu,

7950-598: The Han and Tang dynasties. It is estimated that the Northern Song had a population of 90 million people, and 200 million by the time of the Ming dynasty . This dramatic increase of population fomented an economic revolution in pre-modern China . The expansion of the population, growth of cities, and emergence of a national economy led to the gradual withdrawal of the central government from direct intervention in

8109-476: The Han dynasty (202 BC – AD 220), but it did not become a popular food in China until the Song dynasty (960–1279). In China, tofu is traditionally used as a food offering when visiting the graves of deceased relatives. It is claimed that the spirits (or ghosts) have long lost their chins and jaws so that only tofu is soft enough for them to eat. Before refrigeration was available in China, tofu

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8268-750: The Indus River , and the Euphrates . Foreigners, in turn, affected the Chinese economy. For example, many West and Central Asian Muslims went to China to trade, becoming a preeminent force in the import and export industry, while some were even appointed as officers supervising economic affairs. Sea trade with the South-west Pacific, the Hindu world, the Islamic world, and East Africa brought merchants great fortune and spurred an enormous growth in

8427-631: The Japanese invasions of Korea (1592–1598) . Much of tofu's early use in East Asia was as a vegetarian substitute for meat and fish by Buddhist monks, especially those following Zen Buddhism. The earliest Japanese document concerning tofu refers to the dish being served as an offering at the Kasuga Shrine in Nara in 1183. The book Tofu Hyakuchin ( 豆腐百珍 ), published in 1782 of the Edo period , lists 100 recipes for cooking tofu. In Southeast Asia, tofu

8586-916: The Kaifeng Jews , and Persian Manichaeans . The populace engaged in a vibrant social and domestic life, enjoying such public festivals as the Lantern Festival and the Qingming Festival . There were entertainment quarters in the cities providing a constant array of amusements. There were puppeteers, acrobats, theatre actors, sword swallowers, snake charmers, storytellers , singers and musicians, prostitutes, and places to relax, including tea houses, restaurants, and organized banquets. People attended social clubs in large numbers; there were tea clubs, exotic food clubs, antiquarian and art collectors' clubs, horse-loving clubs, poetry clubs, and music clubs. Like regional cooking and cuisines in

8745-724: The Mongol Empire , died in 1259 while besieging the mountain castle Diaoyucheng in Chongqing . His younger brother Kublai Khan was proclaimed the new Great Khan and in 1271 founded the Yuan dynasty. After two decades of sporadic warfare, Kublai Khan's armies conquered the Song dynasty in 1279 after defeating the Southern Song in the Battle of Yamen , and reunited China under the Yuan dynasty. Technology , science, philosophy, mathematics, and engineering flourished during

8904-566: The Nara period (710–794). Some scholars believe tofu arrived in Vietnam during the 10th and 11th centuries. It spread to other parts of Southeast Asia as well. This probably coincided with the spread of Buddhism as it is an important source of protein in the vegetarian diet of East Asian Buddhism . Li Shizhen , during the Ming dynasty , described a method of making tofu in the Compendium of Materia Medica . Since then, tofu has become

9063-487: The Pearl River Delta in 1279, the Yuan army, led by the general Zhang Hongfan , finally crushed the Song resistance. The last remaining ruler, the 13-year-old emperor Zhao Bing , committed suicide, along with Prime Minister Lu Xiufu and 1300 members of the royal clan. On Kublai's orders, carried out by his commander Bayan, the rest of the former imperial family of Song were unharmed; the deposed Emperor Gong

9222-628: The Yangtze to establish a new capital at Lin'an (modern Hangzhou). The Jurchen conquest of North China and shift of capitals from Kaifeng to Lin'an was the dividing line between the Northern and Southern Song dynasties. After their fall to the Jin, the Song lost control of North China. Now occupying what has been traditionally known as "China Proper", the Jin regarded themselves the rightful rulers of China. The Jin later chose earth as their dynastic element and yellow as their royal color. According to

9381-411: The go and xiangqi board games. During this period greater emphasis was laid upon the civil service system of recruiting officials; this was based upon degrees acquired through competitive examinations , in an effort to select the most capable individuals for governance. Selecting men for office through proven merit was an ancient idea in China . The civil service system became institutionalized on

9540-417: The shipbuilding industry of Song-era Fujian . However, there was risk involved in such long overseas ventures. In order to reduce the risk of losing money on maritime trade missions abroad, wrote historians Ebrey, Walthall, and Palais: [Song era] investors usually divided their investment among many ships, and each ship had many investors behind it. One observer thought eagerness to invest in overseas trade

9699-461: The universal history text of the Zizhi Tongjian , compiled into 1000 volumes of 9.4 million written Chinese characters . The genre of Chinese travel literature also became popular with the writings of the geographer Fan Chengda (1126–1193) and Su Shi, the latter of whom wrote the 'daytrip essay' known as Record of Stone Bell Mountain that used persuasive writing to argue for

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9858-473: The 11th century, political rivalries divided members of the court due to the ministers' differing approaches, opinions, and policies regarding the handling of the Song's complex society and thriving economy. The idealist Chancellor , Fan Zhongyan (989–1052), was the first to receive a heated political backlash when he attempted to institute the Qingli Reforms , which included measures such as improving

10017-405: The 11th-century innovation of the use of coal instead of charcoal in blast furnaces for smelting cast iron . Much of this iron was reserved for military use in crafting weapons and armouring troops, but some was used to fashion the many iron products needed to fill the demands of the growing domestic market. The iron trade within China was advanced by the construction of new canals, facilitating

10176-456: The Chinese term rǔfǔ ( 乳腐 ), which literally means "milk curdled", used during Sui dynasty (AD 581–618), for dishes with a consistency like yogurt or soft cheese, later influenced by Mongolian milk products and methods of production, and the term dòufu ( 豆腐 , "beans curdled" ) or tofu. Although intriguing and possible, there is no evidence to substantiate this theory beyond academic speculation. A form of tofu may have been discovered during

10335-618: The Confucian classics of the Four Books as an introductory corpus to Confucian learning formed the basis of the Neo-Confucian doctrine. By the year 1241, under the sponsorship of Emperor Lizong , Zhu Xi's Four Books and his commentary on them became standard requirements of study for students attempting to pass the civil service examinations. The neighbouring countries of Japan and Korea also adopted Zhu Xi's teaching, known as

10494-423: The Jin dynasty. It had able military officers such as Yue Fei and Han Shizhong . The government sponsored massive shipbuilding and harbor improvement projects, and the construction of beacons and seaport warehouses to support maritime trade abroad, including at the major international seaports , such as Quanzhou , Guangzhou , and Xiamen , that were sustaining China's commerce. To protect and support

10653-580: The Liao forces, who engaged in aggressive yearly campaigns into Northern Song territory until 1005, when the signing of the Shanyuan Treaty ended these northern border clashes. The Song were forced to provide tribute to the Khitans, although this did little damage to the Song economy since the Khitans were economically dependent upon importing massive amounts of goods from the Song. More significantly,

10812-496: The Mongols as vassals ; when the Jin suddenly moved their capital city from Beijing to Kaifeng, the Mongols saw this as a revolt. Under the leadership of Ögedei Khan (r.1229–1241), both the Jin dynasty and Western Xia dynasty were conquered by Mongol forces in 1233/34. The Mongols were allied with the Song, but this alliance was broken when the Song recaptured the former imperial capitals of Kaifeng, Luoyang , and Chang'an at

10971-519: The New Policies and pursued political opponents, tolerated corruption and encouraged Emperor Huizong (1100–1126) to neglect his duties to focus on artistic pursuits. Later, a peasant rebellion broke out in Zhejiang and Fujian, headed by Fang La in 1120. The rebellion may have been caused by an increasing tax burden, the concentration of landownership and oppressive government measures. While

11130-591: The Northern Song ( 北宋 ; 960–1127), the capital was in the northern city of Bianjing (now Kaifeng ) and the dynasty controlled most of what is now East China . The Southern Song ( 南宋 ; 1127–1279) comprise the period following the loss of control over the northern half of Song territory to the Jurchen-led Jin dynasty in the Jin–Song wars . At that time, the Song court retreated south of the Yangtze and established its capital at Lin'an (now Hangzhou ). Although

11289-532: The Philippines are major producers of tofu and have plants in many municipalities. Tofu in the Philippines is widely eaten as the breakfast snack tahô (soft tofu, from Philippine Hokkien 豆腐 "tāu-hū"), or as tokwa (dry, firm tofu that is usually fried, from Philippine Hokkien 豆干 "tāu-goa"), which is a staple alternative to meat in main meals and in numerous regional dishes. Tofu was introduced to

11448-651: The Shushigaku (朱子學, School of Zhu Xi) of Japan, and in Korea the Jujahak (주자학). Buddhism's continuing influence can be seen in painted artwork such as Lin Tinggui 's Luohan Laundering . However, the ideology was highly criticized and even scorned by some. The statesman and historian Ouyang Xiu (1007–1072) called the religion a "curse" that could only be remedied by uprooting it from Chinese culture and replacing it with Confucian discourse. The Chan sect experienced

11607-723: The Song dynasty alternated between warfare and diplomacy with the ethnic Khitans of the Liao dynasty in the northeast and with the Tanguts of the Western Xia in the northwest. The Song dynasty used military force in an attempt to quell the Liao dynasty and to recapture the Sixteen Prefectures , a territory under Khitan control since 938 that was traditionally considered to be part of China proper (Most parts of today's Beijing and Tianjin ). Song forces were repulsed by

11766-535: The Song dynasty had lost control of the traditional Chinese heartlands around the Yellow River , the Southern Song Empire contained a large population and productive agricultural land, sustaining a robust economy. In 1234, the Jin dynasty was conquered by the Mongols , who took control of northern China, maintaining uneasy relations with the Southern Song. Möngke Khan , the fourth Great Khan of

11925-409: The Song dynasty was able to hold back the Jin, a new foe came to power over the steppe, deserts, and plains north of the Jin dynasty. The Mongols , led by Genghis Khan (r. 1206–1227), initially invaded the Jin dynasty in 1205 and 1209, engaging in large raids across its borders, and in 1211 an enormous Mongol army was assembled to invade the Jin. The Jin dynasty was forced to submit and pay tribute to

12084-519: The Song dynasty, but also the last instance where a war elephant corps was employed as a regular division within a Chinese army. There was a total of 347 military treatises written during the Song period, as listed by the history text of the Song Shi (compiled in 1345). However, only a handful of these military treatises have survived, which includes the Wujing Zongyao written in 1044. It

12243-406: The Song era. The Song dynasty was the first in world history to issue banknotes or true paper money and the first Chinese government to establish a permanent standing navy . This dynasty saw the first surviving records of the chemical formula for gunpowder, the invention of gunpowder weapons such as fire arrows , bombs, and the fire lance . It also saw the first discernment of true north using

12402-416: The Song forces only 3,000 men on 120 warships, the Song dynasty forces were victorious in both battles due to the destructive power of the bombs and the rapid assaults by paddlewheel ships . The strength of the navy was heavily emphasized following these victories. A century after the navy was founded it had grown in size to 52,000 fighting marines. The Song government confiscated portions of land owned by

12561-527: The Song navy that could carry 1,000 soldiers aboard their decks, while the swift-moving paddle-wheel craft were viewed as essential fighting ships in any successful naval battle. In a battle on January 23, 971, massive arrow fire from Song dynasty crossbowmen decimated the war elephant corps of the Southern Han army. This defeat not only marked the eventual submission of the Southern Han to

12720-530: The Song state recognized the Liao state as its diplomatic equal. The Song created an extensive defensive forest along the Song-Liao border to thwart potential Khitan cavalry attacks. The Song dynasty managed to win several military victories over the Tanguts in the early 11th century, culminating in a campaign led by the polymath scientist, general, and statesman Shen Kuo (1031–1095). However, this campaign

12879-492: The Song, the era was known for its regional varieties of performing arts styles as well. Theatrical drama was very popular amongst the elite and general populace, although Classical Chinese —not the vernacular language —was spoken by actors on stage. The four largest drama theatres in Kaifeng could hold audiences of several thousand each. There were also notable domestic pastimes, as people at home enjoyed activities such as

13038-526: The Tang era, would also be revived in China under Mongol rule. Sumptuary laws regulated the food that one consumed and the clothes that one wore according to status and social class. Clothing was made of hemp or cotton cloths, restricted to a color standard of black and white. Trousers were the acceptable attire for peasants, soldiers, artisans, and merchants, although wealthy merchants might choose to wear more ornate clothing and male blouses that came down below

13197-578: The United States was established in 1878. In 1908, Li Yuying , a Chinese anarchist and a vegetarian with a French degree in agriculture and biology, opened a soy factory, the Usine de la Caséo-Sojaïne . This was the world's first soy dairy and the first factory in France to manufacture and sell beancurd. However, tofu was not well known to most Westerners before the middle of the 20th century, when it

13356-516: The amount of heat needed to cause the same increase in one milliliter of water. Thus, 1 large calorie is equal to 1000 small calories. In nutrition and food science , the term calorie and the symbol cal may refer to the large unit or to the small unit in different regions of the world . It is generally used in publications and package labels to express the energy value of foods in per serving or per weight, recommended dietary caloric intake , metabolic rates , etc. Some authors recommend

13515-541: The archipelago in the 10th to 13th centuries by Song dynasty Chinese mariners and merchants, along with many other foods that became staples of the Philippine diet. The use and production of tofu were first limited to urban centers with influential Chinese minorities, such as Cebu or Tondo , but quickly spread to even remote native villages and islands. Benjamin Franklin was the first American to mention tofu, in

13674-528: The arts as accepted pastimes of the cultured scholar-official, including painting , composing poetry , and writing calligraphy . The poet and statesman Su Shi and his associate Mi Fu (1051–1107) enjoyed antiquarian affairs, often borrowing or buying art pieces to study and copy. Poetry and literature profited from the rising popularity and development of the ci poetry form . Enormous encyclopedic volumes were compiled, such as works of historiography and dozens of treatises on technical subjects. This included

13833-579: The assault against the Song, gaining a temporary foothold on the southern banks of the Yangtze. By the winter of 1259, Uriyangkhadai's army fought its way north to meet Kublai's army, which was besieging Ezhou in Hubei . Kublai made preparations to take Ezhou , but a pending civil war with his brother Ariq Böke —a rival claimant to the Mongol Khaganate—forced Kublai to move back north with

13992-980: The boiling point of water). The actual amount of energy required to accomplish this temperature increase depends on the atmospheric pressure and the starting temperature; different choices of these parameters have resulted in several different precise definitions of the unit. ≈  0.003 964   BTU ≈  1.162 × 10   kW⋅h ≈  2.611 × 10   eV ≈  0.003 985  BTU ≈ 1.168 × 10  kW⋅h ≈ 2.624 × 10  eV ≈  0.003 9671  BTU ≈ 1.1626 × 10  kW⋅h ≈ 2.6124 × 10  eV ≈  0.003 964  BTU ≈ 1.162 × 10  kW⋅h ≈ 2.610 × 10  eV ≈  0.003 971  BTU ≈ 1.164 × 10  kW⋅h ≈ 2.615 × 10  eV ≈  0.003 9683  BTU ≈ 1.1630 × 10  kW⋅h ≈ 2.6132 × 10  eV ≈  0.003 9683  BTU = 1.1630 × 10  kW⋅h ≈ 2.6132 × 10  eV The two definitions most common in older literature appear to be

14151-461: The budding movement of Neo-Confucianism , led by Cheng Yi (1033–1107) and Zhu Xi (1130–1200). Mahayana Buddhism influenced Fan Zhongyan and Wang Anshi through its concept of ethical universalism , while Buddhist metaphysics deeply affected the pre–Neo-Confucian doctrine of Cheng Yi. The philosophical work of Cheng Yi in turn influenced Zhu Xi. Although his writings were not accepted by his contemporary peers, Zhu's commentary and emphasis upon

14310-528: The bulk of his forces. In Kublai's absence, the Song forces were ordered by Chancellor Jia Sidao to make an immediate assault and succeeded in pushing the Mongol forces back to the northern banks of the Yangtze. There were minor border skirmishes until 1265, when Kublai won a significant battle in Sichuan . From 1268 to 1273, Kublai blockaded the Yangtze River with his navy and besieged Xiangyang ,

14469-511: The central Song court remained politically divided and focused upon its internal affairs, alarming new events to the north in the Liao state finally came to its attention. The Jurchen , a subject tribe of the Liao, rebelled against them and formed their own state, the Jin dynasty (1115–1234) . The Song official Tong Guan (1054–1126) advised Emperor Huizong to form an alliance with the Jurchens, and

14628-464: The cities of Huizhou , Chengdu , Hangzhou , and Anqi. The size of the workforce employed in paper money factories was large; it was recorded in 1175 that the factory at Hangzhou employed more than a thousand workers a day. The economic power of Song China can be attested by the growth of the urban population of its capital city Hangzhou. The population was 200,000 at the start of the 12th century and increased to 500,000 around 1170 and doubled to over

14787-469: The collapse of the Jin dynasty. After the first Mongol invasion of Vietnam in 1258, Mongol general Uriyangkhadai attacked Guangxi from Hanoi as part of a coordinated Mongol attack in 1259 with armies attacking in Sichuan under Mongol leader Möngke Khan and other Mongol armies attacking in modern-day Shandong and Henan . On August 11, 1259, Möngke Khan died during the siege of Diaoyu Castle in Chongqing . His successor Kublai Khan continued

14946-470: The court. Wang Anshi's "New Policies Group" ( Xin Fa ), also known as the "Reformers", were opposed by the ministers in the "Conservative" faction led by the historian and Chancellor Sima Guang (1019–1086). As one faction supplanted another in the majority position of the court ministers, it would demote rival officials and exile them to govern remote frontier regions of the empire. One of the prominent victims of

15105-610: The curds are not pressed. Coagulation of the protein and oil ( emulsion ) suspended in boiled soy milk is the most important step in the production of tofu. This process is accomplished with the aid of coagulants. Coagulation depends on complex interactions. There are many variables including the variety and percentage of protein in the soybeans used, slurry cooking temperature, coagulation temperature, and other factors. Soybean proteins are mainly composed of 7S and 11S proteins. The negative surface charges on these globulins usually cause them to repel each other. Heating soy milk denatures

15264-486: The days of refrigeration from the need to preserve tofu or to increase its shelf life. Other production techniques are employed to create tofus with different textures and flavors. During freezing, the ice crystals puncture cell walls and facilitate the release of free and bound water and cause a decrease in total water content in tofu after freezing then thawing. The initial protein-water bonds are irreversibly replaced by protein-protein bonds, which are more elastic and cause

15423-413: The dynasty, government posts were disproportionately held by two elite social groups: a founding elite who had ties with the founding emperor and a semi-hereditary professional elite who used long-held clan status, family connections , and marriage alliances to secure appointments. By the late 11th century, the founding elite became obsolete, while political partisanship and factionalism at court undermined

15582-511: The early 11th century to 400,000 candidates by the late 13th century. The civil service and examination system allowed for greater meritocracy , social mobility , and equality in competition for those wishing to attain an official seat in government. Using statistics gathered by the Song state, Edward A. Kracke, Sudō Yoshiyuki, and Ho Ping-ti supported the hypothesis that simply having a father, grandfather, or great-grandfather who had served as an official of state did not guarantee one would obtain

15741-561: The economy. The lower gentry assumed a larger role in local administration and affairs. Song society was vibrant, and cities had lively entertainment quarters. Citizens gathered to view and trade artwork, and intermingled at festivals and in private clubs. The spread of literature and knowledge was enhanced by the rapid expansion of woodblock printing and the 11th-century invention of movable type printing. Philosophers such as Cheng Yi and Zhu Xi reinvigorated Confucianism with new commentary, infused with Buddhist ideals, and emphasized

15900-591: The educational system and state bureaucracy. Seeking to resolve what he saw as state corruption and negligence, Wang implemented a series of reforms called the New Policies . These involved land value tax reform, the establishment of several government monopolies, the support of local militias, and the creation of higher standards for the Imperial examination to make it more practical for men skilled in statecraft to pass. The reforms created political factions in

16059-402: The empire. In one such project, cartographers created detailed maps of each province and city that were then collected in a large atlas . Emperor Taizu also promoted groundbreaking scientific and technological innovations by supporting works like the astronomical clock tower designed and built by the engineer Zhang Sixun . The Song court maintained diplomatic relations with Chola India ,

16218-586: The establishment of retirement homes , public clinics , and paupers ' graveyards . The Song dynasty supported a widespread postal service that was modeled on the earlier Han dynasty (202 BCE – CE 220) postal system to provide swift communication throughout the empire. The central government employed thousands of postal workers of various ranks to provide service for post offices and larger postal stations. In rural areas, farming peasants either owned their own plots of land , paid rents as tenant farmers , or were serfs on large estates. Although women were on

16377-447: The famed Bao Zheng (999–1062) embodied the upright, moral judge who upheld justice and never failed to live up to his principles. Song judges specified the guilty person or party in a criminal act and meted out punishments accordingly, often in the form of caning . A guilty individual or parties brought to court for a criminal or civil offense were not viewed as wholly innocent until proven otherwise, while even accusers were viewed with

16536-451: The flow of iron products from production centres to the large market in the capital city. The annual output of minted copper currency in 1085 reached roughly six billion coins. The most notable advancement in the Song economy was the establishment of the world's first government issued paper-printed money, known as Jiaozi (see also Huizi ). For the printing of paper money , the Song court established several government-run factories in

16695-466: The form of tofu that is being manufactured. For soft silken tofu ( 嫩 豆 腐 ; nèndòufu in Chinese or 絹漉し豆腐 kinugoshi-dōfu in Japanese) or tofu pudding ( 豆 花 , dòuhuā OR 豆腐花, dòufuhuā in Chinese or おぼろ豆腐 Oboro-dōfu in Japanese) the soy milk is curdled directly in the tofu's final packaging. For standard firm East Asian tofu, the soy curd is cut and strained of excess liquid using cheesecloth or muslin and then lightly pressed to produce

16854-400: The government relied upon the cooperation of the few or many local gentry in the area. For example, the Song government—excluding the educational-reformist government under Emperor Huizong—spared little amount of state revenue to maintain prefectural and county schools; instead, the bulk of the funds for schools was drawn from private financing. This limited role of government officials was

17013-521: The hierarchic social order, a person could gain status and prestige in society by becoming a high-ranking military officer with a record of victorious battles. At its height, the Song military had one million soldiers divided into platoons of 50 troops, companies made of two platoons, battalions composed of 500 soldiers. Crossbowmen were separated from the regular infantry and placed in their own units as they were prized combatants, providing effective missile fire against cavalry charges. The government

17172-414: The importance of proper coroner 's conduct during autopsies and the accurate recording of the inquest of each autopsy by official clerks. The Song military was chiefly organized to ensure that the army could not threaten Imperial control, often at the expense of effectiveness in war. Northern Song's Military Council operated under a Chancellor, who had no control over the imperial army. The imperial army

17331-413: The interest in the performance of post-mortem autopsies in China during the 12th century. The physician and judge known as Song Ci (1186–1249) wrote a pioneering work of forensic science on the examination of corpses in order to determine cause of death (strangulation, poisoning, drowning, blows, etc.) and to prove whether death resulted from murder, suicide, or accidental death. Song Ci stressed

17490-495: The joint military campaign under this Alliance Conducted at Sea toppled and completely conquered the Liao dynasty by 1125. During the joint attack, the Song's northern expedition army removed the defensive forest along the Song-Liao border. However, the poor performance and military weakness of the Song army was observed by the Jurchens, who immediately broke the alliance, beginning the Jin–Song Wars of 1125 and 1127. Because of

17649-487: The knee, skirts, and jackets with long or short sleeves, while women from wealthy families could wear purple scarves around their shoulders. The main difference in women's apparel from that of men was that it was fastened on the left, not on the right. The main food staples in the diet of the lower classes remained rice, pork, and salted fish. In 1011, Emperor Zhenzong of Song introduced Champa rice to China from Vietnam 's Kingdom of Champa , which sent 30,000 bushels as

17808-451: The landed gentry in order to raise revenue for these projects, an act which caused dissension and loss of loyalty amongst leading members of Song society but did not stop the Song's defensive preparations. Financial matters were made worse by the fact that many wealthy, land-owning families—some of which had officials working for the government—used their social connections with those in office in order to obtain tax-exempt status. Although

17967-419: The last obstacle in his way to invading the rich Yangtze River basin. Kublai officially declared the creation of the Yuan dynasty in 1271. In 1275, a Song force of 130,000 troops under Chancellor Jia Sidao was defeated by Kublai's newly appointed commander-in-chief, general Bayan . By 1276, most of the Song territory had been captured by Yuan forces, including the capital Lin'an. In the Battle of Yamen on

18126-446: The lowest amount of greenhouse gas emissions (1.6 kg CO 2 / 100 g protein). The English word "tofu" comes from Japanese tōfu ( 豆腐 ). The Japanese tofu , in turn, is a borrowing of Chinese 豆腐 ( Mandarin : dòufǔ; tou4-fu ) 'bean curd, bean ferment'. The earliest documentation of the word in English is in the 1704 translation of Domingo Fernández Navarrete 's A Collection of Voyages and Travels , that describes how tofu

18285-558: The major cause of Song economic prosperity. Artisans and merchants formed guilds that the state had to deal with when assessing taxes, requisitioning goods, and setting standard workers' wages and prices on goods. The iron industry was pursued by both private entrepreneurs who owned their own smelters as well as government-supervised smelting facilities. The Song economy was stable enough to produce over 100,000,000 kg (220,000,000 lb) of iron products per year. Large-scale Deforestation in China would have continued if not for

18444-412: The marriage strategies of the professional elite, which dissolved as a distinguishable social group and was replaced by a multitude of gentry families. Due to Song's enormous population growth and the body of its appointed scholar-officials being accepted in limited numbers (about 20,000 active officials during the Song period), the larger scholarly gentry class would now take over grassroots affairs on

18603-727: The most prosperous and advanced economies in the medieval world. Song Chinese invested their funds in joint stock companies and in multiple sailing vessels at a time when monetary gain was assured from the vigorous overseas trade and domestic trade along the Grand Canal and Yangtze River. Both private and government-controlled industries met the needs of a growing Chinese population in the Song; prominent merchant families and private businesses were allowed to occupy industries that were not already government-operated monopolies. Economic historians emphasize this toleration of market mechanisms over population growth or new farming technologies as

18762-597: The multitude of ships sailing for maritime interests into the waters of the East China Sea and Yellow Sea (to Korea and Japan ), Southeast Asia , the Indian Ocean , and the Red Sea , it was necessary to establish an official standing navy . The Song dynasty therefore established China's first permanent navy in 1132, with a headquarters at Dinghai . With a permanent navy, the Song were prepared to face

18921-402: The name ergon , and officially adopted in 1882). In 1928, there were already serious complaints about the possible confusion arising from the two main definitions of the calorie and whether the notion of using the capital letter to distinguish them was sound. The joule was the officially adopted SI unit of energy at the ninth General Conference on Weights and Measures in 1948. The calorie

19080-460: The naval forces of the Jin on the Yangtze River in 1161, in the Battle of Tangdao and the Battle of Caishi . During these battles the Song navy employed swift paddle wheel driven naval vessels armed with traction trebuchet catapults aboard the decks that launched gunpowder bombs . Although the Jin forces commanded by Wanyan Liang (the Prince of Hailing) boasted 70,000 men on 600 warships, and

19239-658: The pattern of the muslin used to drain and press it. Western firm tofu is milled and reformed after pressing. Su ji is a more common type of unflavored, extra-firm tofu. It cannot be crumbled and has a more rubbery texture. One variety of dried tofu is pressed especially flat and sliced into long strings with a cross-section smaller than 2 mm × 2 mm. Shredded dried tofu ( 豆干絲 , dòugānsī in Chinese, or simply 干絲 , gānsī ), which looks like loose cooked noodles , can be served cold, stir-fried, or added to soup, as with Japanese aburaage . Many forms of processed tofu exist. Some processing techniques probably originate before

19398-401: The political rivalry, the famous poet and statesman Su Shi (1037–1101), was jailed and eventually exiled for criticizing Wang's reforms. The continual alternation between reform and conservatism had effectively weakened the dynasty. This decline can also be attributed to Cai Jing (1047–1126), who was appointed by Emperor Zhezong (1085–1100) and who remained in power until 1125. He revived

19557-432: The positive double-bonded ions of the calcium or magnesium are responsible for the coagulation of the soy proteins which become part of the tofu, thereby enhancing its nutritional value. Only 1 part per 1000 of the tofu eaten is coagulant; most of the coagulant reacts with soy protein and is broken down into ions. The non-reactive portion dissolves in the whey and is discarded. The curds are processed differently depending on

19716-517: The proteins and exposes hydrophobic groups normally oriented toward the inside of the globulin structure. Cations from coagulants bind the negatively charged groups. As the net charges of the protein molecules are neutralized, attractive hydrophobic interactions dominate over repulsive electrostatic charges, and protein aggregates are formed. Two types of coagulants (salts and acids) are used commercially. Contemporary tofu manufacturers may choose to use one or more of these coagulants since each plays

19875-408: The range of options, tofu products can be split into two main categories: 'fresh tofu', which is produced directly from soy milk, and 'processed tofu', which is produced from fresh tofu. Tofu production also creates important by-products that are used in various cuisines. Unpressed fresh tofu is gelled soy milk with curd that has not been cut and pressed of its liquid. Depending on whether the soy milk

20034-407: The recruitment system of officials, increasing the salaries for minor officials, and establishing sponsorship programs to allow a wider range of people to be well educated and eligible for state service. After Fan was forced to step down from his office, Wang Anshi (1021–1086) became Chancellor of the imperial court. With the backing of Emperor Shenzong (1067–1085), Wang Anshi severely criticized

20193-573: The removal of the previous defensive forest, the Jin army marched quickly across the North China Plain to Kaifeng. In the Jingkang Incident during the latter invasion, the Jurchens captured not only the capital, but the retired Emperor Huizong, his successor Emperor Qinzong , and most of the Imperial court. The remaining Song forces regrouped under the self-proclaimed Emperor Gaozong of Song (1127–1162) and withdrew south of

20352-776: The rest of China proper , reuniting much of the territory that had once belonged to the Han and Tang empires and ending the upheaval of the Five Dynasties and Ten Kingdoms period. In Kaifeng , he established a strong central government over the empire. The establishment of this capital marked the start of the Northern Song period. He ensured administrative stability by promoting the civil service examination system of drafting state bureaucrats by skill and merit (instead of aristocratic or military position) and promoted projects that ensured efficiency in communication throughout

20511-595: The rest of the Ten Kingdoms , ending the Five Dynasties and Ten Kingdoms period . The Song often came into conflict with the contemporaneous Liao , Western Xia and Jin dynasties in northern China. After retreating to southern China following attacks by the Jin dynasty, the Song was eventually conquered by the Mongol-led Yuan dynasty . The dynasty's history is divided into two periods: during

20670-459: The same level of authority. Robert Hartwell and Robert P. Hymes criticized this model, stating that it places too much emphasis on the role of the nuclear family and considers only three paternal ascendants of exam candidates while ignoring the demographic reality of Song China, the significant proportion of males in each generation that had no surviving sons, and the role of the extended family . Many felt disenfranchised by what they saw as

20829-439: The small unit; the "large" unit being generally called "kilocalorie" with symbol "kcal". It is mostly used to express the amount of energy released in a chemical reaction or phase change , typically per mole of substance, as in kilocalories per mole . It is also occasionally used to specify other energy quantities that relate to reaction energy, such as enthalpy of formation and the size of activation barriers . However, it

20988-446: The solution in kelvins or degrees Celsius. However, this estimate assumes that the volumetric heat capacity of the solution is 1 kcal/( L ⋅ K ), which is not exact even for pure water. Song dynasty The Song dynasty ( / s ʊ ŋ / ) was an imperial dynasty of China that ruled from 960 to 1279. The dynasty was founded by Emperor Taizu of Song , who usurped the throne of the Later Zhou dynasty and went on to conquer

21147-412: The soy milk solution used in the production of the tofu so that the relevant compounds precipitate out and are removed during the extraction of okara. The opacity of tofu gel and the off-white color typical of standard uncooked firm tofu is due to the scattering of light by the colloidal particles of the tofu. The addition of higher levels of calcium salts or a high protein content will contribute to forming

21306-407: The soybean variety, soybean protein composition, and degree of aggregation of the tofu gel network. The yellowish-beige color of soybeans is due to the color compounds including anthocyanin, isoflavones, and polyphenol compounds; therefore the soybean variety used will predicate the color of the final tofu product. Ways to reduce the yellow color include reducing isoflavone content by changing the pH of

21465-474: The spelling Calorie and the symbol Cal (both with a capital C) if the large calorie is meant, to avoid confusion; however, this convention is often ignored. In physics and chemistry , the word calorie and its symbol usually refer to the small unit, the large one being called kilocalorie (kcal). However, the kcal is not officially part of the International System of Units (SI), and

21624-450: The taste. The hot grind method reduces the beany flavor by inactivating the lipoxygenase enzyme in the soy protein that is known to generate off flavors. Eliminating these flavors makes tofu that is "bland". If a cold grind is used lipoxygenase remains and produces the aldehyde, alcohol, and ester volatile compounds that create beany notes. A wide variety of types and flavors of tofu is available in both Western and Eastern markets. Despite

21783-655: The theory of the Five Elements (wuxing), the earth element follows the fire, the dynastic element of the Song, in the sequence of elemental creation. Therefore, their ideological move showed that the Jin considered Song reign in China complete, with the Jin replacing the Song as the rightful rulers of China Proper. Although weakened and pushed south beyond the Huai River , the Southern Song found new ways to bolster its strong economy and defend itself against

21942-412: The time. In 1960, a stone mural unearthed from an Eastern Han dynasty tomb provided support for the theory of the Han origin of tofu; however some scholars maintain that tofu during the Han dynasty was rudimentary and lacked the firmness and taste for it to be considered as tofu. Another theory suggests that the production method for tofu was discovered accidentally when a slurry of boiled, ground soybeans

22101-464: The unit kilocalorie to the unit kilojoules, whereas most physiologists prefer to use kilojoules. In the majority of other countries, nutritionists prefer the kilojoule to the kilocalorie. In the European Union , on nutrition facts labels , energy is expressed in both kilojoules and kilocalories, abbreviated as "kJ" and "kcal" respectively. In China , only kilojoules are given. The unit

22260-472: The use of intermediary agents. The Song judicial system retained most of the legal code of the earlier Tang dynasty, the basis of traditional Chinese law up until the modern era. Roving sheriffs maintained law and order in the municipal jurisdictions and occasionally ventured into the countryside. Official magistrates overseeing court cases were not only expected to be well-versed in written law but also to promote morality in society. Magistrates such as

22419-404: The vast local level. Excluding the scholar-officials in office, this elite social class consisted of exam candidates, examination degree-holders not yet assigned to an official post, local tutors, and retired officials. These learned men, degree-holders, and local elites supervised local affairs and sponsored necessary facilities of local communities; any local magistrate appointed to his office by

22578-518: The waist. Acceptable apparel for scholar-officials was rigidly defined by the social ranking system. However, as time went on this rule of rank-graded apparel for officials was not as strictly enforced. Each official was able to display his awarded status by wearing different-colored traditional silken robes that hung to the ground around his feet, specific types of headgear, and even specific styles of girdles that displayed his graded-rank of officialdom. Women wore long dresses, blouses that came down to

22737-530: The waving of banners and to halt at the sound of bells and drums. The Song navy was of great importance during the consolidation of the empire in the 10th century; during the war against the Southern Tang state, the Song navy employed tactics such as defending large floating pontoon bridges across the Yangtze River in order to secure movements of troops and supplies. There were large ships in

22896-452: Was an era of administrative sophistication and complex social organization. Some of the largest cities in the world were found in China during this period (Kaifeng and Hangzhou had populations of over a million). People enjoyed various social clubs and entertainment in the cities, and there were many schools and temples to provide the people with education and religious services. The Song government supported social welfare programs including

23055-462: Was demoted, being given the title 'Duke of Ying', but was eventually exiled to Tibet where he took up a monastic life. The former emperor would eventually be forced to commit suicide under the orders of Kublai's great-great-grandson, Gegeen Khan , out of fear that Emperor Gong would stage a coup to restore his reign. Other members of the Song imperial family continued to live in the Yuan dynasty, including Zhao Mengfu and Zhao Yong. The Song dynasty

23214-476: Was divided among three marshals, each independently responsible to the Emperor. Since the Emperor rarely led campaigns personally, Song forces lacked unity of command. The imperial court often believed that successful generals endangered royal authority, and relieved or even executed them (notably Li Gang, Yue Fei, and Han Shizhong ). Although the scholar-officials viewed military soldiers as lower members in

23373-582: Was eager to sponsor new crossbow designs that could shoot at longer ranges, while crossbowmen were also valuable when employed as long-range snipers . Song cavalry employed a slew of different weapons, including halberds, swords, bows, spears, and ' fire lances ' that discharged a gunpowder blast of flame and shrapnel . Military strategy and military training were treated as sciences that could be studied and perfected; soldiers were tested in their skills of using weaponry and in their athletic ability. The troops were trained to follow signal standards to advance at

23532-543: Was introduced to the region by Chinese immigrants from Fujian province , as evidenced by many countries in Southeast Asia referring to tofu using the Min Nan Chinese word for either soft or firm tofu, or "tāu-hū" or "tāu-goa" respectively. In Indonesia , Malaysia , Singapore , Thailand , Cambodia , Myanmar , the Philippines and Vietnam , tofu is widely available and used in many local dishes. Tofu

23691-523: Was made. The word towfu also appears in a 1770 letter from the English merchant James Flint to Benjamin Franklin . The term "bean curd(s)" for tofu has been used in the United States since at least 1840. Tofu making was first recorded during the Chinese Han dynasty about 2000 years ago. Chinese legend ascribes its invention to Prince Liu An (179–122   BC) of Anhui province. Tofu and its production technique were introduced to Japan during

23850-412: Was mentioned in the 7th edition of the SI brochure as an example of a non-SI unit. The alternate spelling calory is a less-common, non-standard variant. The "small" calorie is broadly defined as the amount of energy needed to increase the temperature of 1 gram of water by 1 °C (or 1 K, which is the same increment, a gradation of one percent of the interval between the melting point and

24009-472: Was mixed with impure sea salt . Such sea salt would probably have contained calcium and magnesium salts, allowing the soy mixture to curdle and produce a tofu-like gel. The last group of theories maintains that the ancient Chinese learned the method for curdling soy milk by emulating the milk curdling techniques of the Mongolians . The primary evidence for this theory is the etymological similarity between

24168-481: Was often only sold during winter since tofu did not spoil as easily in cold weather. During the warmer months, tofu, once made, spoils if stored for more than a day. Tofu was introduced to Japan by Zen Buddhist monks, who initially called it "Chinese curd" ( 唐腐 , tōfu ) . A firm variation of tofu was introduced in Tosa Province , today's Kochi Prefecture , by a Korean doctor and prisoner of war following

24327-558: Was popularized in the United States by William Shurtleff and Akiko Aoyagi ( The Book of Tofu , 1975). Regardless of the product or scale of the production, the production of tofu essentially consists of: It is similar to the production of dairy cheese by coagulating the milk of dairy animals to form curds and pressing and aging the curds to form cheese. Typical tofu-making procedures are cleaning, soaking, grinding beans in water, filtering, boiling, coagulation, and pressing. There are also types, such as Japanese raw silken tofu, in which

24486-498: Was rarely consumed since the bull was a valuable draft animal, and dog meat was absent from the diet of the wealthy, although the poor could choose to eat dog meat if necessary (yet it was not part of their regular diet). People also consumed dates , raisins, jujubes , pears, plums, apricots, pear juice, lychee -fruit juice, honey and ginger drinks, spices and seasonings of Sichuan pepper , ginger , soy sauce, vegetable oil, sesame oil, salt, and vinegar. The Song dynasty had one of

24645-565: Was the eighth emperor of the Song dynasty and he was a renowned artist as well as a patron of the art and the catalogue of his collection listed over 6,000 known paintings. A prime example of a highly venerated court painter was Zhang Zeduan (1085–1145) who painted an enormous panoramic painting , Along the River During the Qingming Festival . Emperor Gaozong of Song initiated a massive art project during his reign, known as

24804-512: Was the first known book to have listed formulas for gunpowder; it gave appropriate formulas for use in several different kinds of gunpowder bombs. It also provided detailed descriptions and illustrations of double-piston pump flamethrowers , as well as instructions for the maintenance and repair of the components and equipment used in the device. The visual arts during the Song dynasty were heightened by new developments such as advances in landscape and portrait painting. The gentry elite engaged in

24963-503: Was ultimately a failure due to a rival military officer of Shen disobeying direct orders, and the territory gained from the Western Xia was eventually lost. The Song fought against the Vietnamese kingdom of Đại Việt twice, the first conflict in 981 and later a significant war from 1075 to 1077 over a border dispute and the Song's severing of commercial relations with Đại Việt. After the Vietnamese forces inflicted heavy damages in

25122-454: Was used by U.S. physician Joseph Howard Raymond , in his classic 1894 textbook A Manual of Human Physiology . He proposed calling the "large" unit "kilocalorie", but the term did not catch on until some years later. The small calorie (cal) was recognized as a unit of the CGS system in 1896, alongside the already-existing CGS unit of energy, the erg (first suggested by Clausius in 1864, under

25281-556: Was used for the "small" unit by Pierre Antoine Favre (chemist) and Johann T. Silbermann (physicist) in 1852. In 1879, Marcellin Berthelot distinguished between gram-calorie and kilogram-calorie, and proposed using "Calorie", with capital "C", for the large unit. This usage was adopted by Wilbur Olin Atwater , a professor at Wesleyan University , in 1887, in an influential article on the energy content of food. The smaller unit

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