نتایج جستجو برای: poly o
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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...
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...
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.
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...
Antiviral activity of polynucleotides: poly 2′-o-ethyladenylic acid and poly 2′-o-ethyluridylic acid
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...
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...
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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