Results 181 to 190 of about 15,301 (228)

Azotobacter Keratitis

Archives of Ophthalmology, 1981
Ten cases of Azotobacter keratitis were identified at the Baylor College of Medicine and Cullen Eye Institute, Houston, from 1972 to 1980. Azotobacter are large, pleomorphic, aerobic, Gram-negative rods of the family Azotobacteraceae. The genus comprises four species (A beijerinckii, A chroococcum, A paspali, and A vinelandii) that are found in soil ...
T J, Liesegang, D R, Jones, N M, Robinson   +2 more
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Calcium Requirements of Azotobacter

Nature, 1957
Calcium was essential for the growth of A. vinelandii, A. chroococcum, A. beijerinckii and A. insigne in the presence and absence of combined nitrogen. A. agile and A. macrocytogenes were able to grow in the absence of calcium but growth was stimulated by the cation. Calcium could be replaced by strontium at roughly the same molar concentration.
J R, NORRIS, H L, JENSEN
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Pseudolysogeny of Azotobacter phages

Virology, 1980
Abstract The establishment of a pseudolysogenic state accompanied by a phenotypic conversion in Azotobacter vinelandii strain O by phages A14, A21, A31, and A41 has been identified. Host cells can be recovered from the pseudolysogens by cultivation in phage-specific antiserum. Pseudolysogens continually give rise at a low rate to phage as a result of
B J, Thompson, E, Domingo, R C, Warner
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Azotobacter vinelandii Citrate Synthase

Biochemistry, 1995
We have purified the citrate synthase from Azotobacter vinelandii and have determined that the size of the subunit is 48,000 Da and the structure of the holoenzyme is a hexamer. This contrasts with earlier estimates that indicate a 58,000 Da subunit and a tetrameric structure.
M, Rault-Leonardon, M A, Atkinson, C A, Slaughter, C R, Moomaw, P A, Srere   +4 more
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Capsule degradation in azotobacter

Life Sciences, 1974
Abstract Enzymic degradation of Azotobacter capsular polysaccharide by the depolymerases from azotophage lysates of A . vinelandii , and from a strain of A . chroococcum was examined. The molecular size of the capsular polysaccharide was examined by molecular sieve chromatography both before and after exposure to the ...
L, Pike, R D, Humphrey, O, Wyss
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Antigens of Azotobacter

Nature, 1960
PREVIOUS attempts at studying the antigens of Azotobacter have met with only limited success. Azo and Yoshida in a brief report1 described complement-fixation by Azotobacter cells in the presence of specific antisera but gave few experimental details. Jensen and Petersen2 obtained an agglutinating antiserum for Azotobacter chroococcum.
exaly   +2 more sources

Derepression of nitrogenase in Azotobacter

Biochemical and Biophysical Research Communications, 1974
Abstract When nitrogenase in Azotobacter vinelandii 12837 is repressed by ammonia, the derepression is accelerated by endotoxin or cyclic AMP. The phenomenon appears neither to be a consequence of accelerated ammonia utilization nor altered activity of preformed enzyme. This is a unique example of an effect of endotoxin on a procaryotic system.
J E, Lepo, O, Wyss
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Azotobacters as biofertilizer

2019
Azotobacters have been used as biofertilizer since more than a century. Azotobacters fix nitrogen aerobically, elaborate plant hormones, solubilize phosphates and also suppress phytopathogens or reduce their deleterious effect. Application of wild type Azotobacters results in better yield of cereals like corn, wheat, oat, barley, rice, pearl millet and
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