نتایج جستجو برای: c20

تعداد نتایج: 1431  

2017
Yu Sun Riccardo Riva

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...

2008
Lech Romanowicz Edward Bańkowski Agnieszka Dobrzyń

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...

Journal: :Protein science : a publication of the Protein Society 2015
Joost Snijder Michiel van de Waterbeemd Matthew S Glover Liuqing Shi David E Clemmer Albert J R Heck

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...

Journal: :African Journal of Biotechnology 2022

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...

Journal: :Politeknik dergisi 2023

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...

Journal: :علوم دامی ایران 0
آرمین توحیدی دانشیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج فرهاد صمدیان دانشجوی دکتری پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج حمید کهرام استادیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج مهدی انصاری دانشجوی کارشناسی ارشد پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

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 ...

Journal: :Buildings 2023

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...

Journal: :Physical review letters 2005
Takahiro Yamamoto Kazuyuki Watanabe Satoshi Watanabe

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...

Journal: :Macromolecular rapid communications 2011
Justyna Trzaskowski Dorothee Quinzler Christian Bährle Stefan Mecking

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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