AVIGAD VONSHAK PDF

Environmental Stress Physiology more. Handbook of Microalgal Mass Fonshak, A new tubular vonzhak for mass production of microalgae outdoors The effect of diphenylamine on astaxanthin biosynthesis in Haematococcus pluvialis was studied. Production of eicosapentaenoic acid EPA in Monodus subterraneus grown in a helical tubular photobioreactor as affected by cell aavigad and light intensity. Physico-chemical parameters influencing DNase activity of the cyanobacterium Spirulina platensis. Recombination protein A gene, recA, from Spirulina platensis sp.

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Professor, Research interests 1. The role of environmental factors, i. Particular attention is given to photoinhibition and modifications in PSII activity in Spirulina and its impact on outdoor productivity. Strain selection and improvement in Spirulina. Different strains of Spirulina are collected and characterized on the basis of their physiological responses to light and temperature.

Another approach is based on the efforts to develop a gene transfer system in Spirulina in order to be able and use molecular genetic approaches in the physiological studies.

The developmental and physiological changes in the course of carotenogenesis induction in Haematococcus pluvialis as correlated with the modification in the photosynthetic activity of the cells are investigated. Springer, Dordrecht, pp Silli C. Arthrospira Spirulina In: Ecology of Cyanobacteria. Their Diversity in Space and Time. Whitton, B. Torzillo, G. Environmental stress physiology. Richmond, A. Recent publications Torzillo, G. Biological constrains in algal biotechnology.

Biotechnology and Bioprocess Engineering, , Biotechnology for Algal Mass Cultivation. Biomaterials and B ioprocessing.

Fingerman, M. Science Publishers, Inc. Vonshak, A. Blackwell Science, pp. Vonshak, A, and Novoplansky, N. Acclimation to low temperature of two Arthrospira platensis Cyanobacteria strains involves down-regulation of PSII and improved resistance to photoinhibition. Radically Rethinking Agriculture for the 21st Century. Science, , Chien, L-F. Enzymatic antioxidant response to low-temperature acclimation in the cyanobacterium Arthrospira platensis.

Journal of Applied Phycology, , Vonshak, A, Laorawat, S. The effect of light availability on the photosynthetic activity and productivity of outdoor cultures of Arthrospira platensis Spirulina , Journal of Applied Phycology, in press.

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Avigad Vonshak Explained

Professor Emeritus Research Interests: The main objective of my work relates to the physiology of microalgae as related to mass culturing outdoors. In a nutshell the work so far points out that our original approach taken some 35 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. Our findings point out that in many cases 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 the photosynthetic apparatus. Based on this working hypothesis we are also reviewing some of our old data related to the role of light and temperature in outdoor cultures and getting a better understanding that algal cultures are shifted during the day from light limitation to light inhibition in a relatively very fast cycle.

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Avigad Vonshak

Biography[ edit ] Vonshak was born in Germany in and immigrated to Israel with his parents in He received his Ph. The main goal of these studies is to try to understand the mechanisms involved in the adaptation of dense algal cultures to the extreme environment existing in many drylands. 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 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.

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AVIGAD VONSHAK PDF

Biography Vonshak was born in Germany in and immigrated to Israel with his parents in He received his Ph. The main goal of these studies is to try to understand the mechanisms involved in the adaptation of dense algal cultures to the extreme environment existing in many drylands. 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 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. 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.

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Professor, Research interests 1. The role of environmental factors, i. Particular attention is given to photoinhibition and modifications in PSII activity in Spirulina and its impact on outdoor productivity. Strain selection and improvement in Spirulina. Different strains of Spirulina are collected and characterized on the basis of their physiological responses to light and temperature. Another approach is based on the efforts to develop a gene transfer system in Spirulina in order to be able and use molecular genetic approaches in the physiological studies.

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