Results 281 to 290 of about 208,706 (350)

Nitrogen chlorosis in blue-green algae

Archiv f�r Mikrobiologie, 1969
Nitrogen deficient Anacystis nidulans contained normal levels of chlorophyll-a and carotenoids but did not contain any phycocyanin. These organisms also contained large amounts of polysaccharide. The addition of nitrate to a deficient culture resulted in the recovery of normal pigmentation over a period of several hours.
M M, Allen, A J, Smith
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Urease Activity in Blue-Green Algae

Science, 1966
The apparent enzymatic hydrolysis of urea has been detected in whole blue-green algae and in cell extracts. Urease is present as an intracellular component in cultures in which no bacterial contaminants are found. The activity in the cells was recovered from the extracts.
D S, Berns, P, Holohan, E, Scott
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The Fine Structure of Blue-Green Algae

Annual Review of Microbiology, 1968
INTRODUCTION • . . . . . . . . . . . . . . . . . . . . . . . . . . , EXTERNAL STRUCTURES AND CELL WALLS , . . , . . , . . . . . , . , . . , . . . . Sheath morphology , . , . . . . . . . . . . . . . . . . , ... . . . . . . . , . , . . . . . . . . Lysozyme ef ects , . . . . . . . , . . . . , . , .. . . . . . . . . . . . . , . , . . , .
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Hydrogen metabolism in blue-green algae

Biochimie, 1978
This manuscript reviews the literature on hydrogen metabolism in blue-green algae and reports some new data from this laboratory. H2-formation by intact cells is found to be catalyzed exclusively by nitrogenase. Its rate appears to be variable from strain to strain used byt is--in our hands--very small.
H, Bothe, E, Distler, G, Eisbrenner
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Blue-Green Algae in Surface Water: Problems and Opportunities

Current Pollution Reports, 2020
H. Vu, L. Nguyen, J. Zdarta, T. Nga, L. Nghiem   +4 more
semanticscholar   +1 more source

Blue-Green Algae

1970
Blue-green algae, or Cyanophyta (cyan = blue; phyton = plant), are found in a wide variety of environments. They occur in marine and fresh water, on and in soil, and on wet stones, cement, and plant pots. Some can withstand the temperatures of hot springs, others the cold of arctic pools.
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THE HETEROCYSTS OF BLUE‐GREEN ALGAE (MYXOPHYCEAE)

Biological Reviews, 1975
Summary1. Heterocysts are found in many species of filamentous blue‐green algae. They are cells of slightly larger size and with a more thickened wall than the vegetative cells.2. Structural details of the heterocyst are: the presence of three additional wall layers, the absence of granules, sparse thylakoid network throughout, except at the poles ...
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Control of sporulation in a blue-green alga

Developmental Biology, 1965
Abstract Sporulation of the blue-green alga Anabaena cylindrica Lemm. generally ensues adjacent to heterocysts, in strings of from one to several cells. As a preliminary to an attempt to test whether heterocysts help to initiate sporulation of cells adjacent to them, environmental conditions conducive to rapid, sure sporulation adjacent to ...
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Blue-Green Algae

1977
The blue-green algae represent a unique stage in the evolution of plant life. The cyanophyta are clearly procaryotic organisms and so they might well be called blue-green bacteria. However they are the only procaryotes able to produce oxygen from water so their photosynthetic activity is like that of the higher plants (Krogmann, 1973).
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SIMPLE CONDITIONS FOR GROWTH OF UNICELLULAR BLUE‐GREEN ALGAE ON PLATES 1, 2

Journal of Phycology, 1968
M. M. Allen
semanticscholar   +1 more source