نتایج جستجو برای: poly o

تعداد نتایج: 629561  

2009
Mark Braverman

We prove that poly-sized AC0 circuits cannot distinguish a poly-logarithmically independent distribution from the uniform one. This settles the 1990 conjecture by Linial and Nisan [LN90]. The only prior progress on the problem was by Bazzi [Baz07, Baz09], who showed that O(logn)-independent distributions fool poly-size DNF formulas. Razborov [Raz08] has later given a much simpler proof for Bazz...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز 1352

اکسیدهای پلی وینیل پیریدین poly (vinylpyridine n-oxides) قبلا" ساخته و مورد مطالعه قرار گرفته اند. مطالعات نشان دهنده فعال بودن این نوع بیوپلی مرها در مقابل بیماری (silicosis) بوده است . در این کار تحقیقی برای پیشبرد مطالعات در مورد بیوپلی مرهای جدید ضد (silicosis) اکسید وینیل پیریمیدین poly (4-vinylpyrimedine n-oxide)(xiv) طی چندین مرحله واکنش ساخته و مطالعه شده است . منحنی تغییرات ویسکوزیته ن...

Journal: :Chemical communications 2014
Xiaobo Zhu Michael Fryd Ann M Valentine Bradford B Wayland

Micelles derived from poly(ε-caprolactone) (PCL) poly(ethylene glycol)(PEG) diblock copolymers (HO-PCLn-b-PEG32-RX, R = -O(CH2)3S(CH2)2-; X = -CO2(-), -SO3(-), -NH3(+)) show corona charge selective degradation catalyzed by P. cepacia lipase isoforms.

Journal: :The Journal of biological chemistry 2011
Sarah Hands Mohammad U Sajjad Michael J Newton Andreas Wyttenbach

Neurodegenerative diseases are characterized by intra- and/or extracellular protein aggregation and oxidative stress. Intense attention has been paid to whether protein aggregation itself contributes to abnormal production of free radicals and ensuing cellular oxidative damage. Although this question has been investigated in the context of extracellular protein aggregation, it remains unclear w...

2008
Chao-Hua Zhang Peng-Zhi Hong Wen-Dong Song

The title europium(III) carboxyl-ate, [Eu(3)(C(8)H(7)O(2))(9)](n), has three independent Eu atoms, two of which are eight-coordinate in a square-anti-prismatic coordination geometry, whereas the third is nine-coordinate in a tricapped trigonal-prismatic coordination geometry. The metal atoms are linked by two bidentate and seven tridentate methyl-benzoate groups into a linear chain running alon...

2003
DENNIS A. CARSON SHIRO SETO

Immune attri t ion may occur in association with severe chronic infections and neoplastic diseases (1). Mechanisms o f immunodeficiency in these disorders have not been elucidated precisely. During inf lammatory states, activated neutrophils release toxic oxygen species into the extracellular envi ronment (2). T h e oxygen products can damage the DNA of adjacent cells (3). T h e accumulation of...

Journal: :The Journal of biological chemistry 1982
P A Bartlett F Eckstein

The Sp diastereomer of thymidine 5'-O-(1-thiotriphosphate) was polymerized by avian myeloblastosis virus reverse transcriptase using poly(A) . d(pT)10 as template-primer. Degradation of the template poly(A) by alkaline hydrolysis and isolation by gel chromatography gave a single-stranded poly(d(p(S)T)), a polymer of thymidine 5'-phosphorothioate. To determine the configuration of the phosphorot...

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