نتایج جستجو برای: culture composition
تعداد نتایج: 531090 فیلتر نتایج به سال:
The phospholipid headgroup composition and fatty acid composition of a gram-positive halotolerant Planococcus sp. (strain A4a) were examined as a function of growth temperature (5 to 35 degrees C) and NaCl content (0 to 1.5 M) of the growth medium. When the growth temperature was decreased, the relative amount of mono-unsaturated branched-chain fatty acids increased. When Planococcus sp. strain...
linum album l. is containing pharmaceutical composition podophyllotoxin(ptox) which is currently being used as a precursor to semi-synthetic anticancer drugs etoposide, teniposide and etopophos. cell culture is as an important source for the production of ptox. several strategies, including treatment with elicitors have shown for enhanced production of secondary metabolites in cell culture syst...
théoriquement, lenseignement constitue, dans la relation didactique, un pôle symétrique à celui de lapprentissage. du point de vue du curriculum, lenseignement est généralement caractérisé comme le moyen par lequel le curriculum est mis en oeuvre. les progrès dans les connaissances psychologiques sur les phénomènes dappropriation ont montré quun savoir est véritablement approprié, cest-à-d...
The basic requirements for high-density photoautotrophic microalgal cultures in enclosed photobioreactors are a powerful light source and proper distribution of light, efficient gas exchange, and suitable medium composition. This article introduces the concept of balancing the elemental composition of growth medium with biomass composition to obtain high-density cultures. N-8 medium, commonly u...
The present study was undertaken to explore the possibility of the use of cultured human keratinocytes for the study of changes in lipid composition in relation to epidermal differentiation. In a submerged culture system, in which the stratification is incomplete, no significant differences have been found between the lipid composition of cells grown either at low calcium concentration (0.06 mM...
BACKGROUND Anaerobic bacteria are increasingly regarded as important in cystic fibrosis (CF) pulmonary infection. The aim of this study was to determine the effect of antibiotic treatment on aerobic and anaerobic microbial community diversity and abundance during exacerbations in patients with CF. METHODS Sputum was collected at the start and completion of antibiotic treatment of exacerbation...
There have been numerous proposals suggesting that whole-culture methods - in which all cells in a growing culture are treated identically - can synchronize cells. An explicit defense of these methods has been presented (Spellman and Sherlock, this issue, pp. 270-273, ). Here, this defense of whole-culture 'synchronization' is subjected to a critical evaluation leading to the conclusion that wh...
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