Joseph Seckbach

Bio: Joseph Seckbach is an academic researcher from Hebrew University of Jerusalem. The author has contributed to research in topics: Algae & Extraterrestrial life. The author has an hindex of 18, co-authored 28 publications receiving 1476 citations. Previous affiliations of Joseph Seckbach include University of California, Los Angeles & Louisiana State University.

Algae and Cyanobacteria in Extreme Environments

Abstract: Foreword, Richard Castenholz. Preface, Joseph Seckbach. Introduction to the algal world, Meltem Conk-Dalay. Acknowledgement, Joseph Seckbach. List of Authors and addresses. PART 1: General Introduction Oxygenic photosynthetic microorganisms in extreme environments: possibilities and limitation, Joseph Seckbach and Aharon Oren. PART 2: Phototrophs at high and low light Effects of ultraviolet radiation on cyanobacteria and their protective mechanisms, Bagmi Pattanaik, Rhena Schumann and Ulf Karsten. The hidden life of algae underground, Werner Reisser. Meromictic lakes as habitats for protists: life in the chemocline and below?, Dag Kaveness and Finn Lovhoiden. Marine phototrophs in the twilight zone, Noga Stambler and Zvy Dubinsky. PART 3: Phototrophs in the marine environment Biology of the chlorophyll D-containing cyanobacterium Acaryochloris marina, Michael Kuhl, Min Chen and A.W.D. Larkum. Phylogenetics, molecular biology and ecological impacts of a group of highly unusual protists: the dinoflagellates, Shauna Murray. Diatoms: Living in a contructal environment, Frithjof Sterrenburg, Richard Gordon, Mary Ann Tiffany and Stephen Nagy. The margin of the sea: survival at the top of the tides, David Garbary. Seaweeds on the abrasion platforms of the intertidal zone of eastern Mediterranean shores, Rachel Einav and Alvaro Israel. Status of mangrove ecosystem: exploring the potential role of cyanobacteria in restoration and afforestation, M. Sundaraman, T. Boopathi and S. Gopinath. Intertidal sandy flatsas a habitat where plastid acquisition processes are ongoing, Noriko Okomota and Isao Inouye. Hydrochemical key to the genesis of calcareous non-laminated and laminated cyanobacterial microbialites, Stephan Kempe and Josef Kazamierczak. Soil and freshwater micro-algae as a food source for invertebrates in extreme environments, Alena Lukesova and Jan Frouz. PART 4: Phototrophs in cold environments Cold tolerance in cyanobacteria and life in the cryosphere, Warwick Vincent. Cyanobacteria in Antarctic lake environments: a mini-review, Shiv M. Singh and Josef Elster. Green cryosestic algae, Jiri Komarek and Linda Nedbalova. Psychrophilic diatoms: mechanisms for survival in freeze-thaw cycles, Thomas Mock and Karen Junge. Algae at extreme low temperatures: the cryobank, Erica Bensen, Keith harding and John Day. PART 5: Phototrophs in hot alkaline and acidic environments and non-thermal acidic habitats Cyanidiophyceae: looking back - looking forward, Gabriele Pinto. Diversity of the cosmopolitan thermophile mastigocladus laminosus at global, regional and local scales, Scott Miller. The thermophilic cyanobacteria of the zerka ma'in thermal springs in Jordan, Danny Ionescu, Aharon Oren, Muna Hindiyeh and Hanan Malkawi. Iron-tolerant cyanobacteria: implications for astrobiology, Igor Brown, Carlton Allen, Daniel Mummey, Svetlana Sarkisova and David McKay. Extreme acidophiles: freshwater algae associated with acid mine drainage, Phil Novis and Jon Harding . Eukaryotic community structure from Rio Tinto (SW, Spain), a highly acidic river, Angeles Aguilera, Linda Amaral-Zettler,

Enigmatic microorganisms and life in extreme environments

Abstract: Westall, F., de Wit, MJ., Dann, J., van der Gaast, S .. and de Ronde, C.E.J. (in prep.) Fossil bacteria and microbial mats from the Early Archean Onvenvacht Group, South Africa. White, N.C., Wood, D.G., and Lee, M.C. (1989) Geology 17,718-722. Wuttke, M. (1983) Senckenbergiana lethaia 65,509-527. Zhang, Z. (1986) J. Micropalaeontology 5, 9-16. Zhang, Y. (1985) Precambrian Research 30, 277-302. Zhang, Y. (1988) Precambrian Research 38, 105-175. Iliodala of Barbara Z. Siegel contributor of "Growth of Orgallisms ;11 "'/111111)//;11: Kllkllbekill' A microbial Elligma." Ill'. Barbanl Z. Seigel received her Ph.D. from Yale University in Iliology (Physiology and Biochemistry). For 28 years she was on the lilculty orthe University of Hawaii where she served as faculty, Dean, and Director of Research. [n addition to her teaching at the University ofllawaii. she has tough in Finland. Germany. the former Yugoslavia, Israel. Italy. China and the Federated States of Micronesia. She is the author or coauthor of more than 150 peer-reviewed scientific papers and sits on the editorial board of two international Journals. Her major research and professional interest include environmental public health wilh an emphasis on natural and man-made disasters. She has also worked on the sources, sinks and mitigation of environmental Illcrclll'Y. lead and other pollutants. As part of her studies on cnvironmental stress physiology (heat, salt, radiation, heavy metals, pollulants. etc.) she has used the enzyme peroxidase as an indicator thai an organism is under stress. She has been publishing on the physiology and evolution of peroxidases for more than 30 years. Dr. Siegel has also contributed to elucidating peace processes through improving the general health and the quality of life in developing

Evolutionary pathways and enigmatic algae : Cyanidium caldarium (Rhodophyta) and related cells

Abstract: Foreword L. Bogorad. Preface J. Seckbach. I: Models for the Eurkaryotic Cellular Origins and Evolutions. 1. Origin of Eukaryota from Cyanobacterium - Membrane Evolution Theory H. Nakamura. 2. Glaucocystophyta: Model for Symbiogenous Evolution of New Eukaryotic Species H. Schenk. 3. Alternative Pathway (Cyanobacterium to Eukaryota) T.E. Jensen. II: Green Enigmatic Algae. 4. Nanochlorum eucaryotum: A Green Enigmatic Alga R. Zahn. 5. Enigmatic Chlorophycean Algae Forming Symbiotic Association with Ciliates W. Reisser. III: The Paradoxical Cyanidiophyceae. The Genus Cyanidium. 6. The Natural History of Cyanidium - Past and Present Perspectives J. Seckbach. 7. Review on the Taxonomic Position of the Cyanidium and Cohorts F.D. Ott, J. Seckbach. 8. Systematic Position and Phylogenic Status of Cyanidium J. Seckbach, F.D. Ott. 9. New Classification for the Genus Cyanidium F.D. Ott, J. Seckbach. 10. Cyanidium investigations in Japan I. Fukuda. 11. The Study of Cyanidiaceae in Russia O. Sentsova. 12. Cyanidium-like Algae from Caves L. Hoffmann. Physiology, Biochemical Pathways and Natural Products. 13. The Function of Peroxisomes in the Cyanidiaceae W. Gross. 14. Nitrogen Metabolism in Thermophilic Algae Rigano, et al. 15. Natural Products of Cyanidiophyceae H. Nagashima. Fine Structures of the Rhodophyta and Cyanidium. 16. Ultrastructure of Unicellular Red Algae S. Broadwater, J. Scott. 17. Ultrastructure of Cytoplasmic Organelles in Cyanidium caldarium K. Ueda. 18. Cyanidium caldarium as a Model Cell for Studying Division of Chloroplasts T. Kuroiwa, et al. Studies on the Molecular Level. 19. Molecular Organization and Expression of the Plastid Genome of Galdieria sulphuraria (= C. caldarium) and Other Unicellular Red Algae K. Zetsche. 20. The Molecular Aspects of Pigments and Photosynthesis in C. caldarium R.F. Troxler. Bibliographic List of the Cyanidiales and Allied Enigmatic Cells. 21. List of Relevant Literature References F.D. Ott, A.J. Petrik-Ott. IV: Appendix. V: Index.

Algae thrive under Pure CO2

Abstract: Unicellular hot spring acidophilic alga Cyanidium cadarium cultured in pure carbon dioxide, examining packed cell volume, oxygen production and growth rate

Molecular mechanisms of photosynthesis

Abstract: 1. Light and Energy. 2. Organization and Structure of Photosynthetic Systems. 3. History and Development of Photosynthesis. 4. Photosynthetic Pigments-Structure and Spectroscopy. 5. Antenna Complexes and Energy Transfer Processes. 6. Reaction Center Complexes. 7. Electron Transfer Pathways and Components. 8. Chemiosmotic Coupling and ATP Synthesis. 9. Carbon Metabolism. 10. Genetics, Assembly and Regulation of Photosynthetic. Systems. 11. Origin and Evolution of Photosynthesis. Appendix 1. Light, Energy and Kinetics

Proceedings of the National Academy of Sciences

Abstract: where A represents the magnetic vector potential, is an integral of the hydromagnetic equations. This -integral made it possible to formulate a variational principle for the force-free magnetic fields. The integral expresses the fact that motions cannot transform a given field in an entirely arbitrary different field, if the conductivity of the medium isconsidered infinite. In this paper we shall show that the full set of hydromagnetic equations admit five more integrals, besides the energy integral, if dissipative processes are absent. These integrals, as we shall presently verify, are I2 =fbHvdV, (2)

Life in Extreme Environments

Abstract: Each recent report of liquid water existing elsewhere in the Solar System has reverberated through the international press and excited the imagination of humankind. Why? Because in the past few decades we have come to realize that where there is liquid water on Earth, virtually no matter what the physical conditions, there is life. What we previously thought of as insurmountable physical and chemical barriers to life, we now see as yet another niche harbouring 'extremophiles'. This realization, coupled with new data on the survival of microbes in the space environment and modelling of the potential for transfer of life between celestial bodies, suggests that life could be more common than previously thought. Here we examine critically what it means to be an extremophile, and the implications of this for evolution, biotechnology and especially the search for life in the Universe.

Effect of Temperature

Abstract: A positive temperature coefficient is the term which has been used to indicate that an increase in solubility occurs as the temperature is raised, whereas a negative coefficient indicates a decrease in solubility with rise in temperature.

Water on Mars

Abstract: Estimates of the amount of water outgassed from Mars, based on the composition of the atmosphere, range from 6 to 160 m, as compared with 3 km for the Earth. In contrast, large flood features, valley networks, and several indicators of ground ice suggest that at least 500 m of water have outgassed. The two sets of estimates may be reconciled if early in its history, Mars lost part of its atmosphere by impact erosion and hydrodynamic escape.