نتایج جستجو برای: nitrogen clusters
تعداد نتایج: 231168 فیلتر نتایج به سال:
The central (`bulge') region of the Milky Way is teeming with a significant fraction mildly metal-deficient stars atmospheres that are strongly enriched in cyanogen ($^{12}$C$^{14}$N). Some these objects, which also known as nitrogen-enhanced stars, hypothesised to be relics ancient assembly history Way. Although chemical similarity unique patterns observed globular clusters has been observed, ...
clusters are geographically close groups of related companies or institutions related to a certain area which are inherently more efficient than the other companies due to advantages such as being located in one place, networks, external knowledge, variability of human capital, etc. today, development through clusters plays a pivotal role in the economic and industrial policies of developed cou...
To reduce ammonium and nitrite in aquaculture water, an isolate of the denitrifying bacterium Pseudomonas stutzeri, SC221-M, was obtained. The effects of various nitrogen and carbon sources, the ratio of carbon to nitrogen and temperature on bacterial growth, denitrification rates and the expression levels of nirS and nosZ in SC221-M were studied. The following conditions were determined to be ...
Nitrogen fixation by the microorganisms in the gut of termites is one of the crucial aspects of symbiosis, since termites usually thrive on a nitrogen-poor diet. The phylogenetic diversity of the nitrogen-fixing organisms within the symbiotic community in the guts of various termite species was investigated without culturing the resident microorganisms. A portion of the dinitrogenase reductase ...
background: this study was conducted to detect clusters of pulmonary tb cases in hamadan province, west of iran. methods: all patients with pulmonary tuberculosis recorded in the surveillance system from 2005 to 2013 were studied. the spatial scan statistic was used to detect significant clusters in status of unadjusted and adjusted for age, sex and location residence variables. results: cluste...
We have constructed derivatives of Streptomyces coelicolor M145 as hosts for the heterologous expression of secondary metabolite gene clusters. To remove potentially competitive sinks of carbon and nitrogen, and to provide a host devoid of antibiotic activity, we deleted four endogenous secondary metabolite gene clusters from S. coelicolor M145--those for actinorhodin, prodiginine, CPK and CDA ...
Biliary excretion of cadmium was studied in two groups of five rats which were given repeated injections of 109Cd. The first group was given a total amount of 6 mg Cd/kg which was 6 times as much as the second group. The elimination of cadmium in bile, urine, and feces was measured 4 to 5 weeks after the last injection. The relative biliary excretion of cadmium was the same in both groupetion, ...
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