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  • 1
    Online Resource
    Online Resource
    Microalgal Production for Biomass and High-Value Products. (2016)
    Milton :Taylor & Francis Group,
    Details
    Keywords: Microalgae. ; Electronic books.
    Description / Table of Contents: Microalgae are a particularly interesting potential source for novel sources of bioproducts, from specialty foods to biofuels and feeds, because they do not compete with agriculture for resources. Covering recent academic and industrial developments, this book outlines the field from a variety of perspectives contributed by experts and practitioners. It reviews the latest technologies in algal biomass production and explores novel uses for biomass products, addressing key issues such as market and supply chain analysis, research and development, business strategies, legal issues, and future prospects in algae biomass production.
    Type of Medium: Online Resource
    Pages: 1 online resource (379 pages)
    Edition: 1st ed.
    ISBN: 9781482219715
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=4542921
    DDC: 579.8
    Language: English
    Note: Cover -- Half Title -- Title Page -- Copyright Page -- Contents -- Preface -- Acknowledgments -- Editors -- Contributors -- Introduction -- Chapter 1 Algal Photosynthesis and Physiology -- Chapter 2 Algal Growth Kinetics and Productivity -- Chapter 3 Microalgae Strain Isolation, Screening, and Identi˜cation for Biofuels and High-Value Products -- Chapter 4 Screening and Improvement of Marine Microalgae for Oil Production -- Chapter 5 Estimating the Maximum Achievable Productivity in Outdoor Ponds: Microalgae Biomass Growth Modeling and Climate-Simulated Culturing -- Chapter 6 Genetic Engineering of Microalgae: Current Status and Future Prospects -- Chapter 7 Crop Protection in Open Ponds -- Chapter 8 Molecular Diagnostic Solutions in Algal Cultivation Systems -- Chapter 9 Terrestrial Agriculture and Aquaculture Waste Treatment -- Chapter 10 Supply of CO2 to Closed and Open Photobioreactors -- Chapter 11 Harvesting and Dewatering of High-Productivity Bulk Microalgae Systems -- Chapter 12 Cultivation of Haematococcus pluvialis for Astaxanthin Production -- Chapter 13 ALGAFARM: A Case Study of Industrial Chlorella Production -- Chapter 14 Heterotrophic Culturing of Microalgae -- Index -- Plates.
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  • 2
    Book
    Book
    Microalgal production for biomass and high-value products (2016)
    Boca Raton : CRC Press, Taylor & Francis Group
    Details Availability
    Keywords: Microalgae ; Microalgae Biotechnology ; Biomass energy ; Biotechnologie ; Algen ; Biomasseproduktion ; Mikroalgen
    Type of Medium: Book
    Pages: xxx, 335 Seiten, 6 ungezählte Blätter , Illustrationen, Diagramme , 24 cm
    ISBN: 9781482219708
    URL: http://www.gbv.de/dms/bowker/toc/9781482219708.pdf
    Language: English
    Note: Literaturangaben
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  • 3
    Electronic Resource
    Electronic Resource
    Temperature sensitive nitrogen fixation mutants of Azotobacter vinelandii (1971)
    Springer
    Archives of microbiology 79 (1971), S. 49-58 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Temperature-sensitive nitrogen fixation mutants of Azotobacter vinelandii were obtained by nitrosoguanidine mutagenesis and penicillin selection. The mutants were unable to grow on N2 at 39° but grew normally at 30° on N2 and at both temperatures in the presence of metabolizable nitrogen compounds. Growth experiments and assays of whole cells for nitrogenase activity separated the mutants into two classes: 1. mutants in which the nitrogenase activity present in cells grown at 30° was unaffected by a shift to 39°, and 2. mutants which lost their nitrogen fixation activity after such a temperature shift. Assays of cell-free extracts of the second class of mutants showed that in all cases tested the enzymatic activity of the nitrogenase complex itself was not affected by the mutation. These mutants might therefore contain some other temperature-sensitive proteins specifically involved in nitrogen fixation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00412040
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  • 4
    Electronic Resource
    Electronic Resource
    Nitrogen fixation by Anabaena cylindrica (1973)
    Springer
    Archives of microbiology 90 (1973), S. 323-332 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Blending Anabaena cylindrica cultures results in a loss of nitrogenase activity which is correlated with the breakage of the filaments at the junctions between heterocysts and vegetative cells. Oxygen inhibition of nitrogen fixation was significant only above atmospheric concentrations. Nitrogen-fixation activities in the dark were up to 50% of those observed in the light and were dependent on oxygen (10 to 20% was optimal). Nitrogenase activity was lost in about 3 h when cells were incubated aerobically in the dark. Re-exposure to light resulted in recovery of nitrogenase activity within 2 h. Blending, oxygen, or dark pre-incubation had similar effects upon cultures grown under air or nitrogen and did not inhibit light-dependent CO2 fixation. We conclude that heterocysts are the sites of nitrogenase activity and propose a model for nitrogen fixation by Anabaena cylindrica.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408927
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  • 5
    Electronic Resource
    Electronic Resource
    Immunochemical evidence that nitrogenase is restricted to the heterocysts in Anabaena cylindrica (1984)
    Springer
    Archives of microbiology 137 (1984), S. 194-199 
    Details
    ISSN: 1432-072X
    Keywords: Heterocysts ; Immunoferritin labelling ; Cyanobacteria ; Anabaena ; Nitrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The question of whether the vegetative cells of Anabaena cylindrica synthesize nitrogenase under anaerobic conditions was studied by immunoferritin labelling of the Fe-Mo protein (Component I). Differentiating cultures, incubated under an argon atmosphere, were treated with DCMU 12 h following initiation of induction. DCMU inhibited photosynthetic O2 production, thus insuring strict anaerobic conditions, but had no effect on nitrogenase induction. Fe-Mo protein levels, as determined by rocket immunoelectrophoresis, increased 5-fold within 24h of DCMU treatment. Immunoferritin labelling of aldehyde fixed, ultrathin cryosections of anaerobically induced filaments showed that the Fe-Mo protein was restricted to the heterocyst. Ferritin labelling was shown to be specific by the following criteria: (a) substituting preimmune goat serum for the anti-Fe-Mo protein IgG prevented ferritin labelling; (b) ferritin-conjugated, non-homologous rabbit anti-goat IgG did not bind; (c) incubation of anti-Fe-Mo protein IgG treated sections with rabbit anti-goat IgG prior to the treatment with the ferritin label also prevented labelling. The results provide direct immunochemical evidence that nitrogenase is restricted to the heterocysts even under strictly anaerobic conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414542
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  • 6
    Electronic Resource
    Electronic Resource
    Nitrogen fixation by Anabaena cylindrica (1973)
    Springer
    Archives of microbiology 93 (1973), S. 101-112 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effects of oxygen, light and photosynthesis inhibitors on nitrogenase activities in Anabaena cylindrica batch cultures were followed as a function of time after inoculation. During the early rapid growth period the nitrogenase activities of cultures grown under air/CO2 or N2/CO2 were relatively resistant to oxygen and DCMU inhibition. These cultures also exhibited oxygen-dependent nitrogenase activity in the dark of up to 50% of that measured in the light. After active growth ceased the cultures continued to slowly grow for a prolonged period of time. The nitrogenase activities of these “old” cultures were very sensitive to oxygen and DCMU inhibition. These cultures also had little or no dark nitrogenase activities. The photosynthesis inhibitor DBMIB was not a specific inhibitor of light-driven electron transport since it inhibited both light and dark nitrogenase activities. Nitrogenase activities induced under oxygen-free/CO2 gas mixtures initially were significantly more sensitive to oxygen inhibition than those induced under air/CO2. We discuss these results in relation to heterocyst function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00424941
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of molybdenum starvation and tungsten on the synthesis and activity of nitrogenase in Anabaena cylindrica (1980)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 9 (1980), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1980.tb05620.x
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  • 8
    Electronic Resource
    Electronic Resource
    Energy production by microbial photosynthesis (1977)
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 19-23 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The large amounts of microalgae produced in waste treatment ponds during sewage purification are a potential source of methane and fertiliser. If techniques can be developed for the selective cultivation of filamentous or colonial microalgae, harvesting of microalgal biomass could be accomplished ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/268019a0
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  • 9
    Electronic Resource
    Electronic Resource
    Photosynthetic apparatus organization and function in the wild type and a chlorophyll b-less mutant of Chlamydomonas reinhardtii. Dependence on carbon source (2000)
    Springer
    Planta 211 (2000), S. 335-344 
    Details
    ISSN: 1432-2048
    Keywords: Key words: Chlamydomonas (mutant) ; Chlorophyll b-less mutant ; Light-harvesting complex ; Photosynthesis ; Productivity (photosynthetic)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract.  The assembly, organization and function of the photosynthetic apparatus was investigated in the wild type and a chlorophyll (Chl) b-less mutant of the unicellular green alga Chlamydomonas reinhardtii, generated via DNA insertional mutagenesis. Comparative analyses were undertaken with cells grown photoheterotrophically (acetate), photomixotrophically (acetate and HCO− 3) or photoautotrophically (HCO− 3). It is shown that lack of Chl b diminished the photosystem-II (PSII) functional Chl antenna size from 320 Chl (a and b) to about 95 Chl a molecules. However, the functional Chl antenna size of PSI remained fairly constant at about 290 Chl molecules, independent of the presence of Chl b. Western blot and kinetic analyses suggested the presence of inner subunits of the Chl a-b light-harvesting complex of PSII (LHCII) and the entire complement of the Chl a-b light-harvesting complex of PSI (LHCI) in the mutant. It is concluded that Chl a can replace Chl b in the inner subunits of the LHCII and in the entire complement of the LHCI. Growth of cells on acetate as the sole carbon source imposes limitations in the photon-use efficiency and capacity of photosynthesis. These are manifested as a lower quantum yield and lower light-saturated rate of photosynthesis, and as lower variable to maximal (Fv/Fmax) chlorophyll fluorescence yield ratios. This adverse effect probably originates because acetate shifts the oxidation-reduction state of the plastoquinone pool, and also because it causes a decrease in the amount and/or activity of Rubisco in the chloroplast. Such limitations are fully alleviated upon inclusion of an inorganic carbon source (e.g. bicarbonate) in the cell growth medium. Further, the work provides evidence to show that transformation of green algae can be used as a tool by which to generate mutants exhibiting a permanently truncated Chl antenna size and a higher (per Chl) photosynthetic productivity of the cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004250000279
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  • 10
    Electronic Resource
    Electronic Resource
    Photosystem-II repair and chloroplast recovery from irradiance stress: relationship between chronic photoinhibition, light-harvesting chlorophyll antenna size and photosynthetic productivity in Dunaliella salina (green algae) (1998)
    Springer
    Photosynthesis research 56 (1998), S. 175-184 
    Details
    ISSN: 1573-5079
    Keywords: chlorophyll antenna size ; damage and repair cycle ; Dunaliella salina ; photoinhibition ; photosynthesis ; Photosystem-II ; photosystem stoichiometry ; productivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract High-light (HL) grown Dunaliella salina cells exhibit lower pigment content, a highly truncated chlorophyll (Chl) antenna size, and accumulation of photodamaged PS II centers in the chloroplast thylakoids (chronic photoinhibition). In HL-grown cells, the rate of photosynthesis saturated at higher irradiances and the quantum yield was lower compared to that of normally-pigmented low-light (LL) grown cells. In spite of these deficiencies, the light-saturated rate of photosynthesis for the HL-cells, when measured on a per chlorophyll basis, was ∼3 times greater than that of the LL-grown cells. To delineate the effect of photoinhibition from the Chl antenna size on quantum yield and rate of photosynthesis, HL-acclimated cells were switched to LL-conditions. Repair of photodamaged PS II, estimated from the recovery of functional PS II centers and from the increase in the quantum yield of photosynthesis, occurred with a half-time of ∼1 h. Chlorophyll accumulation in the cells occurred with a half-time of ∼4 h. The differential kinetics in repair versus Chl accumulation provided a ‘window of opportunity’, within about 2–3 h after the HL→LL shift, when cells exhibited a high quantum yield of photosynthesis, a small Chl antenna size and a light-saturated rate that was ∼6–9 times greater than that of the normally pigmented LL-grown cells. The work provides insight on the temporal sequence of events at the chloroplast and thylakoid membrane levels, leading from a chronic photoinhibition of PS II to repair and recovery. It is suggested that it is possible to maximize photosynthetic productivity and light utilization in mass microalgal cultures by minimizing the light-harvesting Chl antenna size of the photosystems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006024827225
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