نتایج جستجو برای: 5 c35
تعداد نتایج: 1216045 فیلتر نتایج به سال:
Mutations in the isocitrate dehydrogenase genes IDH1 and IDH2 are among the first genetic alterations observed during the development of lower-grade glioma (LGG). LGG-associated IDH mutations confer gain-of-function activity by converting α-ketoglutarate to the oncometabolite R-2-hydroxyglutarate (2HG). Clinical samples and gene expression data from The Cancer Genome Atlas (TCGA) demonstrate re...
The microbial degradation of two Venezuelan crude oils enriched in 25-norhopanes was examined after a 5-week aerobic incubation using a microbial enrichment culture. Analysis of the oils using gas chromatography±mass spectrometry revealed degradation of the C28 tricyclic terpane, the C29±C34 17a(H),21b(H)-hopanes, and the C29 17a(H),21b(H)-25-norhopane. The C35 17a(H),21b(H)-hopane and 18a(H)-o...
جداسازی ترکیبات فولوات و ناخالصیهای غیرآلی از محلولهای قلیایی هیومیکی، بهدلیل تاثیر بر بهبود کیفیت و درصد خلوص محصول نهایی هیومیک اسید، از اهمیت بالایی برخوردار است. بدین منظور، در این پژوهش، از یک سامانه غشایی برای جداسازی ترکیبات فولوات از محلولهای هیوماتی حاصلاز استخراج قلیایی زغالسنگهای نارس، استفاده شده است. در این سامانه، از یک غشای پلیمری فراپالایه از جنس پلیسولفون و با اندازه حف...
Gender Patterns in Vietnam’s Child Mortality We analyze child mortality in Vietnam focusing on gender aspects. Contrary to several other countries in the region, mortality rates for boys are substantially larger than for girls. A large rural-urban mortality difference exists, but much more so for boys than for girls. A higher education level of the mother reduces mortality risk, but the effect ...
In this work, austenite–martensite transformation in a low alloy steel is modeled using Voronoi algorithm. The evolved fraction of martensite predicted from the geometry diagram constructed, incorporating nucleation kinetics and obtained results are validated against Koistinen–Marburger equation. geometrical properties phase identified characteristics Poisson–Voronoi diagram. Finally, microstru...
In this paper we characterise the selection into parenthood for men and women separately and estimate effects of motherhood and fatherhood on wages. We apply propensity score matching exploiting an extensive high-quality register-based data set augmented with family background information. We estimate net effects of parenthood and find that mothers receive 7.4% lower average wages compared to n...
This paper formalizes an empirically implementable framework for the definition of local antitrust markets in retail markets. This framework rests on a demand model that captures the trade-off between distance and pecuniary cost across alternative shopping destinations within local markets. The paper develops, and presents estimation results for, an empirical demand model at the store level for...
Based on a unique firm-level data set from the German manufacturing sector, this paper disentangles environmental and non-environmental product and process innovations. The multivariate probit analysis shows that the various innovation types are determined by different factors. The estimation results suggest a policy mix which comprises the encouragement of R&D activities, certified management ...
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