نتایج جستجو برای: base replacement
تعداد نتایج: 366615 فیلتر نتایج به سال:
This study examined the effects of hormone replacement combined with strength training on improving dynamic balance control in post-menopausal women. Thirty one participating post-menopausal women were divided into three groups (hormone replacement (HR), non-hormone replacement (NR) and control (CR) group). HR and NR groups were tested for muscle strength and balance control during gait, prior ...
The class II PHA (polyhydroxyalkanoate) synthases [PHA(MCL) synthases (medium-chain-length PHA synthases)] are mainly found in pseudomonads and catalyse synthesis of PHA(MCL)s using CoA thioesters of medium-chain-length 3-hydroxy fatty acids (C6-C14) as a substrate. Only recently PHA(MCL) synthases from Pseudomonas oleovorans and Pseudomonas aeruginosa were purified and in vitro activity was ac...
Joseph, Dilip, Omar Tirmizi, Xiao-Ling Zhang, Edward D. Crandall, and Richard L. Lubman. Polarity of alveolar epithelial cell acid-base permeability. Am J Physiol Lung Cell Mol Physiol 282: L675–L683, 2002. First published November 30, 2001; 10.1152/ajplung.00330.2001.—We investigated acid-base permeability properties of electrically resistive monolayers of alveolar epithelial cells (AEC) grown...
موضوع این تحقیق به تهیه ی سیستم های کاتالیزوری باز شیف مولیبدن{pvc-en-sciff base -[moo2(acac)] , pvc-en-schiff base-[mo(co)4] و pvc-ea-[moo2(acac) } متصل به پلی وینیل کلرید و بررسی فعالیت کاتالیزوری آنها اختصاص دارد. بر این اساس ابتدا ترکیبات مولیبدن باز شیف از طریق پیوند کووالانسی به پلی وینیل کلرید متصل و به وسیله تکنیک های اسپکتروسکوپی شناسایی شدند. این سیستم ها در اپوکسایش آلکن ها درنقش کات...
در این پروژه تاثیر مواد جوانه زای حاوی تیتانیم و بور (al-5ti-1b) و زیرکنیم (al-15zr)، همراه با اثر عناصر نادر خاکی (misch metal) بر خواص کششی و ریز ساختار آلیاژ al-12zn-3mg-2.5cu بررسی شد. دو دسته از عناصر میش متال یعنی غنی از سریم (ce base) و غنی از لانتانیم (la base) مورد استفاده قرار گرفت. مقدار بهینه جوانه زاها که 05/0 درصد تیتانیم و 3/0 درصد زیرکنیم است، جداگانه به همراه 1/0، 3/0، 5/0، 1، ...
BACKGROUND Osteochondromas are one of the most common benign tumours of bone, but they are rare in the craniofacial region. These condylar tumours have been variably treated, including resection through local excision or condylectomy with or without reconstruction. METHODS A case of osteochondroma of the mandibular condyle and cranial base arising concurrently in the 76 years old patient was ...
The U1 small nuclear ribonucleoprotein particle U1C protein has a zinc finger-like structure (C2H2 motif) at its N terminus, which is conserved from yeast to humans. Mutations of amino acid L13 within this domain rescue the essential function of the helicase protein Prp28p. Prp28p has been implicated in unwinding the 5' splice site (5'ss)-U1 small nuclear RNA (snRNA) base-pairing, to allow repl...
In bacteriorhodopsin Asp85 has been proposed to function both as a negative counterion to the Schiff base and as proton acceptor in the early stages of the photocycle. To test this proposal further, we have replaced Asp85 by His. The rationale for this replacement is that although His can function as a proton acceptor, it cannot provide a negative charge at residue 85 to serve as a counterion t...
When speaking about linear programming problems of big dimensions with rare matrix of the system, solved through simplex method, it is necessary, at each iteration, to calculate the inverse of the base matrix, which leads to the loss of the rarity character of the matrix. The paper proposes the replacement of the calculus of the inverse of the base matrix with solving through iterative parallel...
The potential energy surfaces of stacked structures consisting of adenine (A) and 2-aminopurine (2AP) have been investigated in the gas phase. Both faceto-back (the double-ring system of one base exactly on top of that of the other one) and face-to-face (one base flipped by 180 ) A/A, 2AP/2AP and A/2AP stacks were considered. Minima and transition states were optimised at the counterpoise-corre...
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