نتایج جستجو برای: growth factor bacteria
تعداد نتایج: 1601609 فیلتر نتایج به سال:
On the basis of the temperature range in which growth can occur, bacteria are usually divided into 3 groups, namely: thermophiles, mesophiles, and psychrophiles (sometimes called cryophiles or rhigophiles). Thermophiles have temperature optima (generally quite close to temperature maxima) 10 to 25 degrees above the temperature optima of mesophiles. Thermophiles and mesophiles are easily disting...
The organism, Hemophilus parain$uenzae, requires factor V as an essential nutrient (1). It has been shown that diand triphosphopyridine nucleotides can serve as factor V (2). When the bacteria have utilized the available factor V, growth and the ability to perform those functions requiring pyridine nucleotide cease. If pyridine nucleotide is added to the bacteria, their ability to grow and carr...
P-107: Vitrification and In Vitro Culture of Mouse Preantral Follicles in Presence of Growth Factors
Background: Cryopreservation of oocytes is an effective technology in assisted reproductive technology. Although successful vitrification of gametes has been reported in several mammalian species, the survival is generally low. The aim of this study was to investigate the effects of fibroblast growth factor (FGF) and hepatocyte growth factor (HGF) on preantral follicle development after vitrifi...
The organism, Hemophilus parain$uenzae, requires factor V as an essential nutrient (1). It has been shown that diand triphosphopyridine nucleotides can serve as factor V (2). When the bacteria have utilized the available factor V, growth and the ability to perform those functions requiring pyridine nucleotide cease. If pyridine nucleotide is added to the bacteria, their ability to grow and carr...
Bacterial communities are able to form complex and three-dimensional biofilm structures. Biofilm formation is an ancient and integral component of the prokaryotic life cycle and a key factor for survival in diverse niches. In biofilms, bacterial lifestyle changes from free-floating cells to sessile cells. Presence in biofilms gives new traits to bacteria, which distinguish them from free cells....
Cultivation of legume species as the second crop in rotation with rice and using plant growth promoting bacteria can be a good approach to improve rice production sustainability. This experiment was carried out to evaluate the effect of plant growth promoting bacteria on accelerating vegetative growth of crimson clover (Alborz 1) and rice (Hashemi) yield in a rice-based cropping system. A facto...
Background and objectives One of the main causes of plant growth and development disorders is the presence of adverse environmental conditions such as drought, which leads to stress in plants and endangers their survival. Recent research, however, recommends the use of soil microorganisms, especially plant growth-promoting bacteria, which are involved in plant growth as well as the nutrient cy...
Lipoteichoic acids (LTA) from various gram-positive bacteria, including oral streptococci such as Streptococcus sanguis, enhanced the production of hepatocyte growth factor (HGF) (scatter factor) by human gingival fibroblasts in culture, whereas lipopolysaccharides (LPS) from various gram-negative bacteria did not. In contrast, LPS induced interleukin 1 activity in human gingival epithelial cel...
Introduction: In recent years, food manufacturers have taken a lot of attention to the use of natural preservatives instead of chemical preservatives in their products, which has led consumers to prefer to use processed food without preservatives or even with natural preservatives. The aim of the present study was to investigate the antibacterial effect of ethanolic extract of Biebersteinia mul...
some criteria of density in beech saplings were studied in various forest associations (mainly galio odorati-fagetum typicum) growing in the submontane region near zurich (swiss central plateau). the sample plots were established in regeneration gaps resulting from swiss irregular shelter wood system (femelschlag). five sample plots, each 2x2m in 3 transects (a total of 15 plots in each gap, x ...
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