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коллекция "revolution"
Главная Коллекция "Revolution" Химия
  • 181. Regulation of the properties of constraction gypsum by the admixtures

    Influence of the basic nature of finely dispersed microfillers on the kinetics of hydrate release and localization and the degree of its crystallization. Formation of contacts between particles of systems, including various modifications of gypsum.

    статья (16,8 K)
  • 182. Removal of uranium (VI) from aqueous solution

    A new amine-functionalized graphene oxide nanosheet was prepared via covalently grafting reaction. Results showed that adsorption capacity of GO was significantly improved by amine functionalization. The Langmuir isotherm and pseudosecond kinetic model.

    статья (55,8 K)
  • 183. Retrosynthetic Approach to the Synthesis of Phenothiazines

    Two possible approaches to the phenothiazine ring that, to the authors’ knowledge, have not been explored yet. The attack of a nitrene onto a diary sulde, the "nitrogen equivalent" of the thionation reaction. The diene character of ve-membered rings.

    научная работа (276,3 K)
  • 184. Role of ionized states of water molecules in the reaction of hydrolysis of saccharose on silica surfaces

    An ion-pair model has been proposed explaining the origin of acidic sites at the silica surface–aqueous solution interface. Importance of role of the dissociated water is shown in the hydrolysis of the saccharose adsorbed on the surface of silica.

    автореферат (549,3 K)
  • 185. s, p, d-элементы, имеющие биологическое значение

    Основные физические и химические свойства натрия, калия, магния и кальция. Важнейшие соединения калия. Способность магния гореть как в воде, так и в атмосфере углекислого газа. Получение, нахождение в природе фосфора, азота, хлора, серы, фтора, йода.

    реферат (80,0 K)
  • 186. Selective oxidization of 2- and 3-aminotoluene by ozone in the glacial acetic acid to the corresponding aminobenzoic acids

    Isomeric aminobenzoic acid – an important chemical product of organic synthesis used in the production of synthetic dyes, medicinal and aromatic substances, wines, pesticides. Investigation the reaction of the oxidization of 2- and 3-aminotoluenes.

    статья (290,7 K)
  • 187. Silicium organic coatings for thermal and fireprotection of reinforced concrete

    Research modifications in the process of protective coating forming while heating. Examination of interaction between silicium organic compounds based on the rich polymethylphenylsiloxane. Opportunities of their utilization for high-temperature.

    статья (275,5 K)
  • 188. Simple Hydrothermal Method for Preparation of CoS2 Nanostructures with Different Morphologies

    Catalytic, electrical, optical and magnetic properties of cobalt sulfide. Chemical structure and application of inorganic compounds and salts the sulfurous acid. Brief description of the structure of pyrite. Methods for the synthesis of the metals.

    статья (517,1 K)
  • 189. Simultaneous determination of two active components of pharmaceutical preparations by sequential injection method using heteropoly complexes

    Development of a new approach to the simultaneous determination of two reducing agents, which is based on the dependence of the rate of their reaction. Automation of the method using a typical device of the method of sequential injection analysis.

    статья (328,4 K)
  • 190. SiO2 як носій для оксидних каталізаторів Cu—Co—Fe реакції окиснення СО

    Каталітична активність та поверхневі властивості нанесених на силікагель оксидних каталізаторів Cu—Co—Fe реакції окиснення СО. Термодесорбційні дослідження впливу на активність оксидних каталізаторів кількості низькотемпературної альфа-3-форми СО2.

    статья (123,2 K)
  • 191. Some supramolecular nanostructures based on catalytic active nickel and iron heteroligand complexes. Functional models of Ni(Fe) dioxygenases

    The possibility of the supramolecular nano structures formation on the basis of iron and nickel heteroligand complexes. Formation of different supramolecular nanostructures on the basis of nickel and iron heteroligand complexes as models for Ni(Fe)ARD.

    статья (1,7 M)
  • 192. Sorption equilibria of heavy metals on polysiloxane with grafted 2-aminoethylpyridine functional groups

    Study of synthesis of silica-based organic-inorganic hybrid materials with grafted 2-aminoethylpyridine functional groups. By elemental analysis to determine the composition of substances. Analysis of surface-structural characteristics of SiAEP.

    статья (175,8 K)
  • 193. sp3-гибридизация углерода

    Понятие и сущность sp3-гибридизации. Модель атома с sp3-гибридными орбиталями. Примеры соединений, для которых характерна sp3-гибридизация. Характеристика электронного строения атома углерода. Химические связи и гибридизация орбиталей атома углерода.

    реферат (399,1 K)
  • 194. Spectrophotometric method for palladium determination using 5-hydroxyimino-4-imino-1,3-thiazolidin-2-one and application to the analysis of intermetallides

    The application of a new, simple and rapid spectrophotometric method to the determination of palladium in the intermetallides Yb40Pd38Sn22 and Yb40Pd40Ga20. Interaction of palladium(II) ions with 5-hydroxyimino-4-imino-1,3-thiazolidin-2-one at pH = 5.0.

    статья (105,0 K)
  • 195. Structural peculiarities and electrochemical properties of R5M3 (R=La, Gd; M=Ge, Sn) doped by lithium

    Electrochemical lithiation reactions of electrodes made of R5M3 alloys were studied in an organic electrolyte containing LiPF6 salt, using the conventional charge-discharge technique, and the reaction products were analyzed by X-ray powder diffraction.

    статья (212,6 K)
  • 196. Structural peculiarities of the [(2-amino-5-ethyl-1,3,4-thiadiazole)CuCl] complex

    Crystals of the [Cu(C4H7N3S)Cl] (1)-complex were synthesized by solvothermal reaction of 2-amino-5-ethyl-1,3,4-thiadiazole (C4H7N3S) with CuCl in hydrochloric acid solution, and studied by X-ray diffraction. 3D hydrogen-bonded framework in complex.

    статья (370,1 K)
  • 197. Structural Properties of Magnesium Oxide Thin Films Deposited by Spray Pyrolysis Technique

    Consideration of the results of x-ray diffraction of the considered chemical compounds. Structural properties of the films of magnesium oxide. Substantiation of optimum parameters of temperature of synthesis of organic and many inorganic compounds.

    статья (521,4 K)
  • 198. Structural properties of the SnxSy films obtained by the thermal vacuum Co-evaporation

    The temperature dependence of the sulfur and tin vapor. Influence of growth conditions on the morphology of the surface and structural properties of the films with the stoichiometric composition and substrate temperature on their chemical composition.

    статья (574,5 K)
  • 199. Structure and properties of effective Al-Zirconium alloys for electronical purposes

    Characteristics of the methods of improving the electrical properties, the proper maintenance alloys for electrical purposes. Analysis of the influence of heating temperature on microhardness of the types foreign made Aluminium-Zirconium alloy wires.

    статья (1,0 M)
  • 200. Structure refinements of the compounds Pr5Si3 and Zr3Si2

    Silicides of rare earth metals. Crystallographic data for a binary compound in Pr-Si and Zr-Si systems. Study of the structure of the binary compound Zr3Si2. Analytical correction of absorption. Displacement parameters and interatomic distances.

    статья (1,1 M)
  • 201. Study of processes during electrolysis of organic dye solution by means of ion-photon spectrometry

    Spectral composition and quantum yield of radiation of the excited particles sputtered by an ion beam from surfaces of the dried sediment formed on electrodes at the electrolysis of the organic dye were studied by the method of ion-photon spectrometry.

    статья (367,6 K)
  • 202. Study of the activities of new catalytic systems in the oxidative dehydrogenation reaction of methanol

    Synthesis, selection of new catalytic systems based on vanadium, molybdenum, zirconium, cobalt, iron for the conversion of methanol to formaldehyde and other valuable compounds, determination of their activity and kinetic regularities of the process.

    статья (899,7 K)
  • 203. Studying an effect of polyurethane functionality directed stabilization of silver nanoparticles as a pathway for manufacturing modern antimicrobial materials

    To study the activity of functional groups of polyurethanes, the characteristics of the stabilization process, the formation of silver nanoparticles. The use of antimicrobial polymeric materials. The interaction of hydrogen bonds between groups of biuret.

    статья (372,7 K)
  • 204. Studying the effect of using different stabilizers on the stability of silver stannate AG2SNO3

    Studying The Effect of the Stabilizer Amount on The Prepared Silver Stannate. The relation between stabilizer type and the required time of the separation process. Studying the Stability of the Silver Stannate in the Presence of P-carrageenan Stabilizer.

    статья (1,1 M)
  • 205. Studying the Grignard reaction of qunazolinone derivatives containing an ester group

    The transformation of 4-oxo-3,4-dihydroquinazolinone derivatives containing an ester group under the conditions of the Grignard reaction. Investigated acetic acid esters proceeds involving the ester group and the excess. The studying reaction of reagent.

    статья (99,7 K)
  • 206. Substantiation of the choice of excipients when developing the composition of "Аpised" capsules

    Justification of the qualitative composition of excipients for encapsulation in the production of "Apised" capsules – a new original medicine, created on the basis of: powder of natural honey and medicinal plant raw materials (hop cones, lavender).

    статья (395,7 K)
  • 207. Substituted (3H-quinazoline-4-yliden)hydrazines in reaction with maleic acid anhydride

    Investigation of the influence of electronic effects of substitution of maleic anhydride with hydrazine in acetic acid. Determination of CO stretching vibrations in the middle of the strip plane strain. Characteristics of magnetic shifts quinazolines.

    статья (136,5 K)
  • 208. Superconducting non-centrosymmetric boride Mg10Ir19B16: crystal structure and chemical bonding

    A sample of Mg10Ir19B16, prepared from the elements by high-temperature treatment in sealed Ta containers. The chemical composition, confirmed by WDXS analysis. Electronic structure calculations and chemical bonding analysis by the ELI/ED approach.

    статья (2,1 M)
  • 209. Supported gold nanoparticles for the oxidation of benzyl alcohol to benzaldehyde

    Review and analysis of oxidation of benzyl alcohols to benzaldehyde which is one of the most important reactions. Study and characterization of the features of the catalyst preparation. Influence of support on oxidation of benzyl alcohol to benzaldehyde.

    статья (610,7 K)
  • 210. Syntesis of novel N-substituted 3-(aminosulfonyl)-2H-1-benzopyran-2-one derivatives and their biological activity

    Method of syntesis of novel N-substituted 3-(aminosulfonyl)-2H-1-benzopyran-2-one in the Knoevenagel condensation conditions. Studing the biological activity of derivatives against protozoan and helminth parasites, active against Onchocerca lienalis.

    статья (83,3 K)

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