Anaerobiosis
Mostrando 25-36 de 359 artigos, teses e dissertações.
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25. Influence of Anaerobiosis on Chlorophyll Biosynthesis in Greening Oat Seedlings (Avena sativa L.) 1
The influence of anaerobiosis for 0.5 to 15 hours on the last steps of chlorophyll biosynthesis of etiolated oat seedlings was investigated. Phototransformation of protochlorophyllide to chlorophyllide is only slightly reduced and esterification of chlorophyllide is slightly increased by pretreatment under anaerobic conditions. Pretreated plants accumulate t
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26. Global control in Salmonella typhimurium: two-dimensional electrophoretic analysis of starvation-, anaerobiosis-, and heat shock-inducible proteins.
The response of Salmonella typhimurium to various forms of environmental stress was examined by using O'Farrell two-dimensional gel electrophoresis. Polypeptides (a total of 110) which quantitatively increased during various starvations, anaerobiosis, or heat shock were identified and cataloged in reference to a standard polypeptide map. Although significant
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27. Expression of R-plasmid functions during anaerobic growth of an Escherichia coli K-12 host.
The normal habitat of enteric bacteria is largely anaerobic. Expression of the three characteristic properties of R-plasmids, drug resistance, vegetative replication, and fertility, was therefore studied in Escherichia coli K-12 during anaerobiosis. Replication and drug resistance functions were not altered in the 45 R-plasmids studies, whereas the expressio
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28. Anaerobiosis, type 1 fimbriae, and growth phase are factors that affect invasion of HEp-2 cells by Salmonella typhimurium.
The invasion of HEp-2 cells by Salmonella typhimurium was studied under various conditions. Anaerobiosis was shown to markedly affect the internalization of bacterial cells by HEp-2 cells. Anaerobically grown bacteria incubated with HEp-2 cells under anaerobic conditions markedly stimulated the rate of invasion. Anaerobiosis may therefore be a controlling fa
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29. Constitutive and Inducible Aerobic and Anaerobic Stress Proteins in the Echinochloa Complex and Rice.
Anaerobic stress resulted in a change in the protein accumulation patterns in shoots of several Echinochloa (barnyard grass) species and Oryza sativa (L.) (rice) as resolved by two-dimensional gel electrophoresis. Of the six Echinochloa species investigated, E. phyllopogon (Stev.) Koss, E. muricata (Beauv.) Fern, E. oryzoides (Ard.) Fritsch Clayton, and E. c
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30. Effect of Anaerobiosis on Staphylococcal Nuclease Production
Five strains of Staphylococcus aureus were examined quantitatively for the production of nuclease under aerobic and anaerobic conditions. Hydrolysis of deoxyribonucleic acid and ribonucleic acid was detected by measuring the release of acidsoluble nucleotides spectrophotometrically. We found that the enzyme was produced anaerobically, as well as aerobically,
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31. Anaerobic Resistance of Clinical Isolates of Staphylococcus aureus to Aminoglycosides†
The anaerobic minimum inhibitory concentration of six aminoglycosides (amikacin, gentamicin, kanamycin, netilmicin, sisomicin, and tobramycin) averaged over 10-fold greater than the aerobic minimum inhibitory concentration for 50 clinical isolates of Staphylococcus aureus. Cultures from osteomyelitis and blood generally showed a somewhat greater increase in
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32. Simple economical anaerobiosis.
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33. Effect of gaseous conditions on isolation and growth of Ureaplasma urealyticum on agar.
Five laboratory-adapted strains of Ureaplasma urealyticum showed comparable colony counts when incubated in eight gaseous environments including air, in different concentrations of carbon dioxide, and under anaerobiosis. For primary isolation on genital mycoplasma agar 95% N2-5% CO2 gave 100% correlation with growth in bromothymol blue broth, whereas certain
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34. A Single Solution Indicator for Anaerobiosis 1
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35. Pleiotropic effects of alkaline phosphatase regulatory mutations phoB and phoT on anaerobic growth of and polyphosphate synthesis in Escherichia coli.
The appearance during anaerobiosis of spontaneous phoT phoB double mutants in a phoT background is described. During both exponential growth and stationary phase, selection against the phoT mutants relative to the wild type was evident. This reduction in viability of phoT mutants was suppressed in phoT phoB double mutants. Sensitivity to anaerobiosis was sho
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36. ANAEROBIOSIS PRODUCED BY MEANS OF A CENTRAL CATALYZING STATION