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18-400: Avigad is a given name and surname. Notable people with the name include: Avigad Vonshak (born 1947), Israeli biologist Gad Avigad (born 1930), Israeli biochemist Jeremy Avigad (born 1968), American philosopher Nahman Avigad (1905–1992), Israeli archaeologist [REDACTED] Name list This page or section lists people that share

36-413: A wet environment. They are distinguished from the higher plants by a lack of true roots , stems or leaves . They do not produce flowers. Many species are single-celled and microscopic (including phytoplankton and other microalgae ); many others are multicellular to one degree or another, some of these growing to large size (for example, seaweeds such as kelp and Sargassum ). Phycology includes

54-812: Is involved in few activities outside of the University served as the director of the Ben-Gurion Heritage institute, he is the academic advisor for the Ramat-Negev International training center for Desert-Agriculture. He is also serving as a special advisor to the Bona-Terra charity foundation devoted to help farmers in the Negev and also serving in the advisory board to the Israeli national lottery “ Mifal HaPayis ” Vonshak's work

72-421: Is trying to understand the different steps associated in the response of the photosynthetic apparatus and mainly PSII to an environmental stress. The work so far points out that our original approach taken some 25 years ago of treating algal growth outdoors in terms of light limitation or a process governed by one main limiting factor was a naive attempt to simplify things. His findings point out that in many cases

90-808: The Algal Biotechnology lab. In 1997 he was asked to establish the graduate school for Desert Studies. As such he served as the first director of the Albert Katz international school for Desert Studies (AKIS) (1998- 2003). He was nominated to be the director of the Jacob Blaustein Institutes for Desert Research BIDR (2002 -2010). At that time the BIDR was restructured to its current form, consisting of three research institutes, dealing with Agriculture and Biotechnology, Water research and Dryland Environment, with AKIS serving as

108-468: The Siboga-expedition . As early as 1803 Jean Pierre Étienne Vaucher had published on the isogamy (sexual conjugation) in the algae, but it was in the early 20th century that reproduction and development began to be extensively studied. The 1935 and 1945 comprehensive volumes of Felix Eugen Fritsch consolidated what was then known about the morphology and reproduction of the algae. This

126-400: The adaptation of dense algal cultures to the extreme environment existing in many drylands. Prof. Vonshak is known internationally mainly for his contribution to the development of the biotechnology for mass culturing of the blue-green algae (cyanobacteria) Spirulina under large-scale conditions. The concept was developed as part of the approach that sustainable development of drylands requires

144-598: The algae. Harvey has been called "the father of modern phycology" in part for his division of the algae into four major divisions based upon their pigmentation. It was in the late 19th and early 20th century, that phycology became a recognized field of its own. Men such as Friedrich Traugott Kützing continued the descriptive work. In Japan, beginning in 1889, Kintarô Okamura not only provided detailed descriptions of Japanese coastal algae, he also provided comprehensive analysis of their distribution. Although R. K. Greville published his Algae Britannicae as early as 1830, it

162-520: The need to develop new innovative biotechnologies that will make use of the environmental condition of drylands and increase the water use efficiency as compared to conventional agriculture methodologies. Professor Vonshak served as President of the Asian Pacific Society for Applied Phycology . He has been involved in many international training programs organized by UNEP , UNESCO and other international agencies. Professor Vonshak

180-439: The photosynthetic apparatus.. Phycology Phycology (from Ancient Greek φῦκος ( phûkos )  'seaweed' and -λογία ( -logía )  'study of') is the scientific study of algae . Also known as algology , phycology is a branch of life science . Algae are important as primary producers in aquatic ecosystems . Most algae are eukaryotic , photosynthetic organisms that live in

198-488: The same given name or the same family name . If an internal link led you here, you may wish to change that link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Avigad&oldid=1010486671 " Categories : Given names Surnames Hidden categories: Articles with short description Short description is different from Wikidata All set index articles Avigad Vonshak Vonshak

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216-423: The scientific study of algae began in the late 18th century with the description and naming of Fucus maximus (now Ecklonia maxima ) in 1757 by Pehr Osbeck . This was followed by the descriptive work of scholars such as Dawson Turner and Carl Adolph Agardh , but it was not until later in the 19th century that efforts were made by J.V. Lamouroux and William Henry Harvey to create significant groupings within

234-402: The study of prokaryotic forms known as blue-green algae or cyanobacteria . A number of microscopic algae also occur as symbionts in lichens . Phycologists typically focus on either freshwater or ocean algae, and further within those areas, either diatoms or soft algae. While both the ancient Greeks and Romans knew of algae, and the ancient Chinese even cultivated certain varieties as food,

252-503: The system is down regulated or even photoinhibited not necessarily because of exposure to high light intensity but rather due to other environmental stress that reduce the photosynthetic activity be it temperature or salinity. As a result, the ability of the cells to utilize light by the photosynthetic machinery is reduced and thus light levels that are considered as harmless under optimal growth conditions are turning to be over-saturating levels and result in down regulating and photoinhibiting

270-609: The teaching arm of the BIDR . He also had few other administrative roles in BGU including serving as the director of the Ben Gurion Research Institute for the Study of Israel and Zionism (2007–13) As well as Dean for international Academic affairs (2010–12). His research interests include the study of environmental stress in algae. The main goal of these studies is to try to understand the mechanisms involved in

288-621: Was born in Germany in 1947 and immigrated to Israel with his parents in 1948. He received his Ph.D from Ben-Gurion University in 1980 and did his post-doctoral studies in the Plant Research Laboratory in Michigan State University . Upon his return to Israel he has joint the faculty of the Jacob Blaustein Institutes for Desert Research (BIDR) at Ben-Gurion University of the Negev as a member of

306-529: Was followed in the 1950s by the development of area checklists, led by Mary Parke with her 1931 Manx Algae and followed in 1953 by her "A preliminary check-list of British marine algae" Although Lily Newton 's 1931 Handbook provided the first identification key for the algae of the British Isles, it was the 1960s before the development of such keys became routine. The 1980s with the new emphasis on ecology saw increased study of algal communities, and

324-527: Was not until 1902 with the publication of A Catalogue of the British Marine Algae by Edward Arthur Lionel Batters that the systematic correlation of records, extensive distribution mapping and the development of identification keys began in earnest. In 1899–1900, Anna Weber-Van Bosse , a Dutch Phycologist travelled on the Siboga expedition and later in 1904, published The Corallinaceae of

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