Covalent

Xem 1-20 trên 127 kết quả Covalent
  • Coordinate covalent bonds: a bond formed when both electrons of the bond are donated by one atom. [H3N: Ag :NH3]+ Ag+ + 2(:NH3) Electron configuration of Ag [Kr]4d105s15P0 Ag+ [Kr]4d105s0 5P0 Sp hybrid orbitals: accommodate 2 pairs of electrons. Linear Complex ion: A metal ion with Lewis base attached to it through coordinate covalent bond. Complex (Coordinate compound): a compound consisting either of complex ions and other ions of opposite charge or of neutral complex species.

    pdf49p doilan 26-01-2013 36 6   Download

  • (BQ) Part 1 book "Descriptive inorganic chemistry" has contents: The electronic structure of the atom - A review; an overview of the periodic table; covalent bondin; ionic bonding; solvent systems and acid base behavior; oxidation and reduction,...and other contents.

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  • (BQ) Part 1 book "Chemistry" has contents: Chemical foundations; atoms, molecules, and ions, stoichiometry; types of chemical reactions and solution stoichiometry; gases, thermochemistry; atomic structure and periodicity; covalent bonding - orbitals; bonding - general concepts; liquids and solids, properties of solutions.

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  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : A one-dimensional extremely covalent material: monatomic carbon linear chain

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A comparative study of non-covalent encapsulation methods for organic dyes into silica nanoparticles

    pdf12p dauphong13 09-02-2012 28 4   Download

  • (BQ) Part 1 book "Organic chemistry" has contents: Covalent bonding and shapes of molecules; alkanes and cycloalkanes, stereoisomerism and chirality, acids and bases; alkenes: bonding, nomenclature and properties; reactions of alkenes; nucleophilic substitution and b elimination,... and other contents.

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  • (BQ) Part 1 book "Organic chemistry" has contents: Covalent bonding and shapes of molecules; alkanes and cycloalkanes, stereoisomerism and chirality, acids and bases; alkenes: bonding, nomenclature and properties; reactions of alkenes; nucleophilic substitution and B-elimination,... and other contents.

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  • (BQ) Part 1 book "Concise inorganic chemistry" has contents: Atomic structure and the periodic table; introduction to bonding; the ionic bond; the covalent bond, the metallic bond.

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  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : From covalent bonding to coalescence of metallic nanorods

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Preparation and Characterization of Covalently Binding of Rat Anti-human IgG Monolayer on Thiol-Modified Gold Surface

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  • Tham khảo luận văn - đề án 'báo cáo khoa học: covalent flavinylation of vanillyl-alcohol oxidase is an autocatalytic process', luận văn - báo cáo, báo cáo khoa học phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • The activity of outer membrane phospholipase A (OMPLA) is regulated by reversible dimerization. However, native OMPLA reconstituted in phospholipid vesicles was found to be present as a dimer but nevertheless inactive. To investigate the importance of dimerization for control of OMPLA activity, a covalent OMPLA dimer was constructed and its properties were compared to native OMPLA both in a micellar detergent and after reconstitution in a phospholipid bilayer.

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  • In this report, the poly(Tyramine) (PTyr) film structure was further studied and determined, based on IR (Infrared), XPS (X-Ray Photoelectron Spectroscopy), EQCM (Electrochemical Quartz Crystal Microbalance) results. Especially, the immobilization capacity of PTyr was investigated by EQCM in situ measurement. The results showed the film porosity had increased the immobilization capacity of PTyr, compared to other polymer film with the same NH2 surface concentration.

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  • This chapter presents the following content: Polar covalent bonds in water molecules result in hydrogen bonding, four emergent properties of water contribute to Earth's suitability for life, acidic and basic conditions affect living organisms.

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học quốc tế cung cấp cho các bạn kiến thức về ngành y đề tài: System in biology leading to cell pathology: stable proteinprotein interactions after covalent modifications by small molecules or in transgenic cells

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  • Many enzymes use one or more cofactors, such as biotin, heme, or flavin. These cofactors may be bound to the enzyme in a noncovalent or covalent manner. Although most flavoproteins contain a noncovalently bound flavin cofactor (FMN or FAD), a large number have these cofactors covalently linked to the polypeptide chain. Most covalent flavin–protein linkages involve a single cofactor attachment via a histidyl, tyrosyl, cysteinyl or threonyl linkage.

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  • A catalytically competent, homodimeric diketide synthase comprising the first extension module of the erythromycin polyketide synthase was analysed using MS, after limited proteolysis to release functional domains, to deter-mine the pattern of covalent attachment of substrates and intermediates to active sites during catalysis.

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  • The benzoacronycine derivative, S23906-1, was character-ized recently as a novel potent antitumor agent through alkylation of theN2 positionof guanines inDNA.We show here that its reactivity towards DNA can be modulated by glutathione (GSH). The formation of covalent adducts between GSH and S23906-1 was evidenced by EI-MS, and the use of different GSH derivatives, amino acids and dipeptides revealed that the cysteine thiol group is absolutely required for complex formation because glutathione disul-fide (GSSG) and other S-blocked derivatives failed to react covalently with S23906-1. ...

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  • poikilocytes tế bào máu có cuống poikilocytocyte hồng cầu biến dạng poikilohydric không điều chỉnh đ−ợc n−ớc poikiloosmotic biến thẩm thấu poikilothermal biến nhiệt poikilotherms động vật biến nhiệu, động vật máu lạnh point mutagenesis sựu đột biến điểm point mutation đột biến điểm poison chất độc Poisson distribution phân bố Poisson pokeweed mitogen chất kích thích phân bào pokeweed polar body thể cực polar body thể cực polar covalent bond liên kết đồng hoá trị phân cực polar granul...

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  • Polymers are materials of very high molecular weight that are found to have multifarious applications in our modern society. They usually consist of several structural units bound together by covalent bonds [1,2]. For example, polyethy- lene is a long-chain polymer and is represented by

    pdf702p beobobeo 01-08-2012 67 42   Download

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