نتایج جستجو برای: c20
تعداد نتایج: 1431 فیلتر نتایج به سال:
S U M M A R Y In this study, we develop a methodology to estimate monthly variations in degree-1 and C20 coefficients by combing Gravity Recovery and Climate Experiment (GRACE) data with oceanicmass anomalies (combination approach).With respect to themethod by Swenson et al., the proposed approach exploits noise covariance information of both input data sets and thus produces stochastically opt...
The lipid composition of arterial walls changes during development, ageing and pathological processes. Preeclampsia is the most common pregnancy-associated pathological syndrome. It is accompanied by significant remodelling of extracellular matrix both in the umbilical cord vessels and in the surrounding Wharton’s jelly. The lipids of the umbilical cord were not studied till now, therefore it w...
Human alpha defensins are a class of antimicrobial peptides with additional antiviral activity. Such antimicrobial peptides constitute a major part of mammalian innate immunity. Alpha defensins contain six cysteines, which form three well defined disulfide bridges under oxidizing conditions. Residues C3-C31, C5-C20, and C10-C30 form disulfide pairs in the native structure of the peptide. The ma...
An experiment was conducted to determine fatty acid (FA) pro?les in Chinese Maiwa yak milk across the lactation cycle. Sixty-one healthy, similar weight, 4-7 years old, 3-6 parity yaks with unrelated background were selected randomly from Hongyuan County, Sichuan province, southwest of China (with altitude over 3500 m). The graze on natural pasture all year around without irrigation, fertilizer...
Metoksimetiltrifenilfosfonyum klorür (MOMTPPC) tek kristalleri Elektron Paramanyetik Rezonans (EPR) spektroskopi yöntemi ile analiz edilmiştir. MOMTPPC kristalleri, 60Co- kaynağı ışınlanarak paramanyetik bozukluklar oluşturulmuştur. kristallerinin EPR spektrumları, 120 K sıcaklıkta üç dik eksen etrafında belirli açılarda döndürülerek spektrumları alınmıştır. MOMTPPC'de ışınlama etkisiyle oluşa...
the aim followed in this study was to make a comparison of the composition of fatty acids available in the sperm lipids of cattle, sheep and goat. semen samples were collected from 28 holestein cows, 12 chal rams and 7 mahabadi goats. after washing out and removal of the seminal plasma, total lipids of the sperm were extracted and fatty acids trans-methylated. the fatty acid methyl esters were ...
Saturated concrete is significantly different from dry in fracture mechanical properties. Using the wedge-splitting tensile method to research rule of change moisture content, double-K toughness and energy three strength grades (C20, C30, C40) immersed a free water environment for 0 h, 2 5 24 120 h were studied order provide support safety evaluation structures environment. The initial cracking...
The effect of molecular vibrations on electronic transport is investigated with the smallest fullerene C20 bridge, utilizing the Keldysh nonequilibrium Green's function techniques combined with the tight-binding molecular-dynamics method. Large discontinuous steps appear in the differential conductance when the applied bias voltage matches particular vibrational energies. The magnitude of the s...
Self-metathesis of undecenoic acid with [(PCy3)2Cl2Ru=CHPh] (2), followed by exhaustive hydrogenation yielded pure 1,20-eicosanedioic acid (5) (>99%) free of side-products from isomerization. Polycondensation with eicosane-1,20-diol (6), formed by reduction of the diol, yielded polyester 20,20 (Tm = 108 °C). By comparison, the known ADMET polymerization of undec-10-enyl undec-10-enoate (7), and...
در این تحقیق نانو ساختارهایC20 bowl ، (n=1-5) C20-nSin وn=1-5) ) C20-nGenاز نظر پایداری ترمودینامیکی، گاف انرژی، هدایت الکتریکی و کاربرد آنها در سلول خورشیدی به کمک نظریه تابعی چگالی در سطح محاسبات کوانتومیLSDA/6-31G در دمای اتاق مورد بررسی و مقایسه قرار گرفته اند. پایدارترین ساختارها در 300 کلوین، C17Si3 و C15Ge5 نتیجه شده اند. نتایج نشان میدهند که تعداد استخلاف سیلیکون و یا ژرمانیم تاثیر منظم...
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