Xem 1-20 trên 35 kết quả Stoichiometry
  • The aim of this book is to provide an overview on the importance of stoichiometry in the materials science field. It presents a collection of selected research articles and reviews providing up-to-date information related to stoichiometry at various levels. Being materials science an interdisciplinary area, the book has been divided in multiple sections, each for a specific field of applications. The first two sections introduce the role of stoichiometry in nanotechnology and defect chemistry, providing examples of state-of-the-art technologies. ...

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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: Phonon Raman spectra of colloidal CdTe nanocrystals: effect of size, non-stoichiometry and ligand exchange

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài: Biophysical analysis of HTLV-1 particles reveals novel insights into particle morphology and Gag stoichiometry...

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  • We studied the interaction of several metal ions with the copper chaperone fromEnterococcus hirae(EhCopZ). We show that the stoichiometry of the protein–metal complex varies with the experimental conditions used. At high con-centration of the protein in a noncoordinatingbuffer, a dimer, (EhCopZ)2–metal, was formed. The presence of a potentially coordinatingmolecule L in the solution leads to the formation of a monomeric ternary complex, EhCopZ– Cu–L, where L can be a buffer or a coordinatingmole-cule (glutathione, tris(2-carboxyethyl)phosphine). ...

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  • The Na + -dependent F-ATP synthases ofIlyobacter tartaricusandPropioni-genium modestum contain membrane-embedded ring-shaped c subunit assemblies with a stoichiometry of 11. Subunit c from either organism was overexpressed in Escherichia coliusing a plasmid containing the corres-ponding gene, extracted from the membrane using detergent and then puri-fied.

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  • Sand burial plays an irreplaceable and unique role in the growth and distribution of vegetation on the Shell Dike Island in the Yellow River Delta. There are still some unknown on the effects of sand burial on the morphology, biomass, and especially the stoichiometry of Periploca sepium, as well as the relationship between these factors.

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  • High-accuracy mass spectrometry enables near comprehensive quantification of the components of the cellular proteomes, increasingly including their chemically modified variants. Likewise, large-scale libraries of quantified synthetic peptides are becoming available, enabling absolute quantification of chemically modified proteoforms, and therefore systems-level analyses of changes of their absolute abundance and stoichiometry.

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  • TiO2 nanocrystal powders have been prepared by sol-gel routes. By controlling pH, TiO2 nanoparticles of sizes ranging from 7 to 14 nm can be synthesized. X-ray diffraction (XRD) analysis indicated that both the anatase and the rutile phase appears in the powder when pH < 2.

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  • The applications of chemistry mainly focus on chemical reactions. ►Need to know several of its characteristics: Stoichiometry, Energetics, Rate

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  • Today, ozone is considered as an alternative oxidant-disinfectant agent with multiple possibilities of application in water, air pollution, medicine, etc. Particularly, in water treatment it has many abilities to disinfect, oxidize, or to be combined with other technologies and reagents.

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  • Tribasic lead sulfate Ž3BS. and tetrabasic lead sulfate Ž4BS., used as precursors of the positive active material in the leadracid batteries, were prepared by a new method: reactive grinding. The effects of various experimental parameters Žstoichiometry, hygrometry of the starting compounds, duration of mechanical treatment. upon the nature and morphological features of the resulting phase were investigated.

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  • (bq) part 1 book "chemistry for engineering students" has contents: introduction to chemistry, atoms and molecules, molecules, moles, and chemical equations; stoichiometry; gases; the periodic table and atomic structure; chemical bonding and molecular structure; molecules and materials; energy and chemistry.

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  • Science seeks to understand and explain our world, be that its physical composition (geology), chemical composition (chemistry), the way its composite matter interacts (physics), or the organisms that inhabit it (biology). We can only get an idea of what life is all about by piecing together information from each discipline to give us the big picture. We don’t have to look very far to realize that it is difficult, if not impossible, to separate biology from chemistry. After all, our body is a bag of chemicals.

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  • Research on ion channels has exploded in the last few decades and it is now clear that ion channels play essential roles in cell biology and physiology, with their dysfunction being the root cause of many human diseases. Understanding human biology in the post-genome sequencing era requires that the function of the protein products encoded by these recently sequenced genes be quantified.

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  • Science and engineering have dominated world events and world culture for at least 150 years. The blind and near blind have been made to see. The deaf and near deaf have been made to hear. The ill have been made well. The weak have been made strong. Radio, television and the internet have made the world seem smaller. And some of us have left the planet. Computers have played an essential role in all of these developments; they are now ubiquitous. These miraculous events happened by design— not by accident. Individuals and teams set out to accomplish goals.

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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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  • (bq) part 1 book "general chemistry - the essential concepts" has contents: introduction; atoms, molecules, and ions; stoichiometry; reactions in aqueous solutions; gases. invite you to consult.

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  • Complexometric titrations many metals form complex with a ligand: Cu++ + NH3 ⇔ Cu(NH3)++ Cu(NH3)2+ + NH3 ⇔ Cu (NH3)22+ Cu (NH3)22+ + NH3 ⇔ Cu (NH3)32+ Cu (NH3)32+ + NH3 ⇔ Cu (NH3)42+ Kf1 Kf2 Kf3 Kf4 Zn (NH3) complexes vs lg NH3 α .• theoretically could titrate Zn with ammonia • stepwise Kf very similar • difficult to know stoichiometry • to ensure all one form, need excess NH3 • titration never gives good equivalence point • can’t use monodentate ligand to titrate metals Titrations with EDTA • • • • use multidentate ligands e.g.

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  • (bq) part 1 book "general chemistry - the essential concepts" has contents: introduction; atoms, molecules, and ions; reactions in aqueous solutions; stoichiometry; gases; energy relationships in chemical reactions; the electronic structure of atoms; the periodic table,...and other contents.

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  • Transport of presecretory proteins into the mammalian rough endoplasmic reticulum involves a protein translocase that comprises the integral membrane proteins Sec61ap, Sec61bp, and Sec61cp as core components. Electron microscopic analysis of protein translocase in rough micro-somal membranes suggested that between three and four heterotrimeric Sec61p complexes form the central unit of protein translocase.

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