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Organic Synthesis In Algal Cells Separated Into Age Groups By Fractional Centrifugation


, : Organic Synthesis In Algal Cells Separated Into Age Groups By Fractional Centrifugation. Archiv für Mikrobiologie 49: 193-208

Synthesis of organic matter was studied in cells of the green, high-temperature alga Chlorella 7-11-05 separated from a nonsynchronized population into fractions of predominantly small or large cells by centrifugation. Rates of synthetic activity were determined as changes in optical density, dry weight, and packed volume of cells in several suspending fluids and under various light intensity conditions. Synthetic activity of the smaller (younger) cell fraction was invariably higher than that of the larger (older) cell fraction. An occasional lack of difference in the performance of the small- and large-cell fractions, or even a higher synthetic activity of the originally large-cell fraction, was traced to cell division. Under conditions favorable to cell division, the large-cell fraction was progressively enriched with smaller (younger) cells, and the metabolic activity of the large-cell fraction increased to the extent that, in some experiments, it surpassed that of the originally small-cell fraction. The decline in synthetic activity of cells in the course of cell development previously observed on synchronized cells was substantiated in nonsynchronized populations in the absence of the lightdark synchronizing agent is, therefore, characteristic of normal cell development.

US$19.90

PMID: 14306558

DOI: 10.1007/bf00422143


Other references

Threadgold, J.; Sheldon, H., 1964: On the fine structure of a new cytoplasmic component in a secreting cell. Journal of Cell Biology, 23(No. 199: 96A-97A

Pasechnhc, I.Kh, 1966: Bile-excreting function of the liver during acute experimental hepatitis after injections of pyridoxine and glucose combinations. Com-bined introduction of pyridoxine and glucose in acute toxic hepatitis of dogs poisoned with carbon tetrachloride (CCI4) produces a marked curative effect, contributing to an early normalization of the secretary function of the liver.

Schneider P.B., 1976: Technetium 99m particle venography its use in the diagnosis of deep vein thrombo phlebitis. Investigative Radiology: 420

Pop G.; Petrescu I., 1983: Paleoclimatology and vegetation of the Upper Cretaceous of Rusca Montana. Studia Universitatis Babes Bolyai: s Geologia-Geographia. 28; Pages 49-54. 1983.

Smoot N.C.ristian; Choi Dong R., 2003: The North Pacific Megatrend. Megatrends are trans-basin features comprised of fracture zones and seamount/island chains. They appear to be hot lines rather than isolated hot spots. The North Pacific Megatrend begins in Japan, crosses the trench in the form of the Geisha Guyot...

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Mboera, L.E.G.; Kamugisha, M.L.; Barongo, V.; Rumisha, S.F.; Msangeni, H.A.; Molteni, F.; Kitua, A.Y., 2004: Community knowledge, perceptions and practices on malaria in Mpwapwa District, central Tanzania. A study on community knowledge, attitudes and practices toward malaria and its management was conducted in Mpwapwa district of central Tanzania between January and February 2001. Six villages, 3 with health facilities (Kibakwe, Makose and Mwanawot...

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Weber, J.; Begin, M.; Khittoo, G., 1975: Genetic Analysis of Adenovirus Type 2 II. Preliminary Phenotypic Characterization of Temperature-Sensitive Mutants. The properties of temperature-sensitive mutants of adenovirus type 2 representing 12 complementation groups were studied. All mutants were normal with respect to adsorption as measured by viral inclusion formation and viral DNA synthesis as shown...

Karpinos, Bernard D., 1941: The socio-economic and employment status of urban youth in the United States, 1935-1936. Based on data of the National Health Survey, this study presents a detailed analysis of the employment, educational, and occupational status of urban youth in the U. S. The study establishes not only the relationship between the education and occu...