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تعداد نتایج: 1615953 فیلتر نتایج به سال:
Elicitation with middle-viscous chitosan (30 mg/50 mL) significantly stimulated silymarin synthesis in Silybum marianum hairy root cultures. The root cultures established by infection with Agrobacterium rhizogenes AR15834 showed a potential for production of silymarin. Elicitation with medium molecular weight of chitosan (0, 5, 10, 20, and 30 mg/50 mL) was used in order to imp...
Among various systems in which induction of new enzyme synthesis can be initiated, that developed by Talalay,'-3 in which the metabolism of a variety of steroids by Pseudomonas testosieroni is induced by either testosterone or certain other steroidal compounds, has been particularly rewarding. Recent studies of this system by Wacker et al.4' 5 have suggested that a complex may be formed between...
Herein we report that in vitro experiments with different initial parasite densities (1, 5, and 10 cysts per mL of culture medium) show that cysts at densities of 10 and 5 grow faster than those at 1, and that they release into the culture medium factors which increase the budding rates of the slower lower-density ones. Close contact among the incubated cysts also favors budding, thus suggestin...
A total of 20 patients with symptomatic urinary tract infections (greater than 10(5) colony-forming units of Escherichia coli per ml of urine in addition to pyuria) received 10 mg of ampicillin and 2 liters of fluid daily for 3 days. After 2 days, 16 patients had culture-negative urine without pyuria. A total of 18 similar patients received only 2 liters of fluid for 3 days. On day 4, all had g...
elicitation with middle-viscous chitosan (30 mg/50 ml) significantly stimulated silymarin synthesis in silybum marianum hairy root cultures. the root cultures established by infection with agrobacterium rhizogenes ar15834 showed a potential for production of silymarin. elicitation with medium molecular weight of chitosan (0, 5, 10, 20, and 30 mg/50 ml) was used in order to improve silymarin pro...
The growth requirements of 135 clinical isolates of Neisseria gonorrhoeae and six American Type Culture Collection reference strains were examined by using a simple chemically defined medium known as Wong-Shockley-Johnston medium, WSJM. The simple liquid medium supported growth of gonococci from an inoculum of 2 X 10(6) colony-forming units ml-1 and yielded 10(10) colony-forming units ml-1 in 1...
This study has developed an innovative method for the production of secondary metabolites starting from Cydonia oblonga Mill (quince) pulp callus culture. The qualitative and quantitative content phenolic triterpenic acids quince extract were elucidated by GC–MS, GC, HPLC-DAD-ESI-MSn. was rich 5-O-caffeoylquinic acid (5-CQA), 5-p-coumaroylquinic (5-p-CoQA) maslinic corosolic acid. Quince extrac...
The corneal endothelium is a single layer of polygonal cells covering the posterior surface of the cornea. The apical free surface of these cells faces the anterior chamber and the basal surface rests on an unusually thick basement lamina, Descemet's membrane. This membrane is collage-nous (1, 6, 11, 12) and is believed to be secreted by the endothelial cells (6, 13, 18). These cells form the p...
Objective: In arteriosclerosis and bypass graft stenosis, intimal proliferation is controlled by local and systemic growth factors, such as platelet derived growth factor (PDGF) or insulin. Intimal hyperplasia can be produced in organ culture models. Our aim was to compare neointima formation in two organ culture models of internal mammary artery (IMA) and saphenous vein (SV), with special refe...
Background. Antibiotic exposure and specimen volume are known to affect pathogen detection by culture. Here we assess their effects on bacterial pathogen detection by both culture and polymerase chain reaction (PCR) in children. Methods. PERCH (Pneumonia Etiology Research for Child Health) is a case-control study of pneumonia in children aged 1-59 months investigating pathogens in blood, naso...
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