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.
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
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
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
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.
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.
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
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
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.
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. ...
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...
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
Reaction mechanism: the description of the
step-by-step process by which reactants are
changed / converted into products. A nucleophile: an electron-rich species that can
form a covalent bond by donating 2 electrons to a
Cấu trúc của các chuỗi polynucleotide
Các nucleotide trong DNA hoặc RNA nối với nhau bằng các mối liên kết đồng hoá trị (covalent) có tên là liên kết 3',5'phosphodiester giữa gốc đường của nucleotide này với nhóm phosphate của nucleotide kế tiếp, tạo thành chuỗi polynucleotide. Vì vậy các chuỗi này bao giờ cũng được kéo dài theo chiều 5'→3' (đầu 5' mang nhóm phosphate tự do và đầu 3' chứa nhóm -OH tự do).
The beginning student in Organic Chemistry is often overwhelmed by facts, concepts, and new language.
Each year, textbooks of Organic Chemistry grow in quantity of subject matter and in level of sophistication.
This Schaum’s Outline was undertaken to give a clear view of first-year Organic Chemistry through the careful
detailed solution of illustrative problems. Such problems make up over 80% of the book, the remainder being a
concise presentation of the material. Our goal is for students to learn by thinking and solving problems rather
than by merely being told....
The Project Gutenberg EBook of Elements of Chemistry,, by Antoine Lavoisier This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net Title: Elements of Chemistry, In a New Systematic Order, Containing all the Modern Discoveries Author: Antoine Lavoisier Translator: Robert Kerr Release Date: December 28, 2009
This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online
Pituitary gonadotropins, follicle-stimulating hormone (FSH) and luteinizing hormone (LH) play central roles in regulating gametogenesis and the production of gonadal hormones, in fish as in other vertebrates. Pituitary gonadotropins are composed of two non-covalently associated polypeptide subunits, which must be glycosylated, folded, and assembled as a heterodimer to be biologically active.