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Showing 1 to 20 of 22 for “"Chlorella pyrenoidosa"”.
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The Fluorescence Transient of Chlorella Pyrenoidosa
Made available in DSpace on 2014-12-09T18:53:04Z (GMT). No. of bitstreams: 1 6812170.pdf: 5685380 bytes, checksum: d44a67f8555f127c4272fc6a393f246e (MD5) Previous issue date: 1968
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Thymidylate kinase activity during synchronous growth of Chlorella pyrenoidosa
… cultures of a high temperature strain of Chlorella pyrenoidosa have been used to determine the activity of the TMP kinase during cellular development. It was observed that the apparent enzyme activity was closely correlated with the rate of DNA biosynthesis. During the period of nuclear …
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A Study of Absorption Changes Upon Illumination of Chlorella Pyrenoidosa
Made available in DSpace on 2014-12-09T18:52:59Z (GMT). No. of bitstreams: 1 6500897.pdf: 3238528 bytes, checksum: 543107834fe99f8777aa5f0769ff199b (MD5) Previous issue date: 1964
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Intracellular distribution of nitrogen during synchronous growth of Chlorella pyrenoidosa
… material as previous culturing methods for <i>C. pyrenoidosa</i> in the same time period and in less than one-tenth the culture volume. Cellular growth parameters increased exponentially throughout the cell cycle of <i>C. pyrenoidosa</i> when the new mass culturing technique was utilized. The …
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Total starch and amylose levels during synchronous growth of Chlorella pyrenoidosa
… dramatic cytological and biochemical changes in Chlorella pyrenoidosa, occurring immediately prior to and during the period of nuclear division and cross-wall deposition, seem to demand an increase in (a) the supply of carbon building blocks for organic synthesis, and (b) the energy-generating …
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Fluorescence Induction in Chlorella Pyrenoidosa and Anacystis Nidulans and Its Relation to Photophosphorylation
Made available in DSpace on 2014-12-09T18:53:05Z (GMT). No. of bitstreams: 1 6812175.pdf: 4506102 bytes, checksum: e819fd762ca8e76604b2ad0599919d8b (MD5) Previous issue date: 1968
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The effect of low level concentrations of 2,4 dichlorophenoxyacetic acid on Chlorella pyrenoidosa
… to evaluate the effect of 2,4D on the growth of Chlorella pyrenoidosa in batch cultures. Cultures were grown over a 12 day period in 2,4D concentrations of 10⁻⁸ to 2 x 10⁻³ M. The culture medium was inoculated to provide 2.0 x 10⁴ cells/ml and incubated under continuous fluorescent lighting at …
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The metabolic role of intracellular inorganic polyphosphate during the synchronous growth of Chlorella pyrenoidosa
The demonstration in algae and bacteria of the presence of a high molecular weight polymer of inorganic phosphate has raised questions concerning the metabolic role of the polymer and the mechanism(s) by which it is synthesized and utilized. The purpose of the research described in this …
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Possible mechanisms controlling the intracellular level of inorganic polyphosphate during synchronous growth of chlorella pyrenoidosa
… growth of a high temperature strain of Chlorella pyrenoidosa in order to correlate their activities with a proposed mechanism for the control of intracellular levels of inorganic acid-insoluble polyphosphate, (Pi)x, during cellular growth and division.
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Control of Aspartate Transcarbamylase activity by Norit-A adsorbable compounds during synchronous growth of Chlorella pyrenoidosa
… of this enzyme in synchronized cultures of Chlorella pyrenoidosa. Aspartate Transcarbamylase, the first enzyme in pyrimidine biosynthesis, has been reported to be controlled by a phenomenon known as " product-inhibition". This enzyme was located in the soluble supernatant of a 100,000 x g …
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Studies on the regulation of pyrimidine nucleotide biosynthesis and its effect on ribonucleic acid accumulation during synchronous growth of Chlorella pyrenoidosa
… cultures of a high temperature strain of Chlorella pyrenoidosa have been used to measure the apparent levels of aspartate transcarbamylase and dihydroorotase, the first two enzymes on the pyrimidine nucleotide biosynthetic pathway during the cell cycle of this organism. When the apparent …
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The Effects of Diazinon on the Growth Rates and Population Dynamics of Planktonic Algae and the Possible Uptake By Two Algal Species
… showed no significant inhibitory response by Chlorella pyrenoidosa-normal strain. The high temperature strain of Chlorella pyrenoidosa was significantly inhibited at 20 and 40 ppm. Selenastrum capricornutum and the blue-green alga, Synechococcus leopoliensis, were also greatly inhibited at 20 …
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Uptake and utilization of alanine-1-14C by freshwater algae.
Experiments were conducted x^ith Chlorella pyrenoidosa, Cosmarium formosulum, and Gloeocapsa sp. to determine their relative heterotrophic capacity at various conditions. Cultures were incubated in nutrient media with 0.5 uc DL-alanine-l-^C added at various temperature (10C, 20C, 30C) and …
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Characterization of biofuel from diatoms via hydrothermal liquefaction
… converting low lipid content microalgae (i.e., Chlorella pyrenoidosa and Spirulina platensis) have shown potential to utilize low lipid microalgae to produce bio-crude oil. Diatoms are a major group of microalgae in water bodies with a high growth rate and that contribute about 20% of global …
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Evidence for continuous potential for gene transcription during the cell cycle of a eukaryote
Synchronous cultures of Chlorella pyrenoidosa (strain 7- 11-05) have been utilized to measure the potential expression of the structural gene for isocitrate lyase (three D<sub>S</sub>-Isocitrate glyoxylate-lyase, EC 4.1.3.1) during the cell cycle. Synthesis of the enzyme could be induced by placing …
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Studies on the mechanism of gene-regulated synthesis of diphosphopyridine nucleotide- and triphosphopyridine nucleotide-specific glutamate dehydrogenase isozymes during the cell cycle of the eucaryote Chlorella
… dehydrogenase isozymes were shown to exist in Chlorella pyrenoidosa (strain 7-11-05) and the cellular level of these isozymes was regulated by the nitrogen source upon which the algae were cultured. One isozyme was induced by ammonium and was specific for the coenzyme, triphosphopyridine …
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Action of Allelochemicals on Algal Growth and Photosystem Ii Efficiency
… growth and photosystem II (PSII) efficiency. Chlorella pyrenoidosa Chick and Selenastrum capricornutum Printz were the bioassay species. Fourteen of the 15 allelochemicals investigated resulted in a significant decrease in C. pyrenoidosa growth; 7 caused more than 10% reduction of PSII …
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Factors affecting the activity and stability of aspartate transcarbamylase from Chlorella
… activity from a thermophilic strain 7-11-05 of Chlorella pyrenoidosa appears to be stabilized during and after (NH₄)₂SO₄ precipitation of the enzyme by at least two factors, one having a molecular weight greater than 10,000 and the other having a molecular weight less than 10,000. The high …
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Influence of osmotic stress, ethanol, and a substituted pyridazinone, BAS 13-338, on the growth and lipid composition of two Chlorella species
Chlorella vulgaris and Chlorella pyrenoidosa were compared relative to their abilities to grow at osmotic potentials of -0.1, -0.5, -1.0, -1.5, -2.0 MPa, [polyethylene glycol(PEG)-induced], and for osmotically-induced changes in lipid composition. C. vulgaris growth was inhibited as osmotic …
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