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коллекция "revolution"
Главная Коллекция "Revolution" Химия
  • 151. New phase Ho3(Ag0.50-0.52Al0.50-0.48)14Agx (x = 0.67-0.77): crystal structure and magnetic properties Ho3Ag7.67Al7.01 and Ho3Ag8.10Al6.76

    Phase analysis and the crystal structure of the compounds has been investigated by means of X-Ray analysis. Magnetic properties of two synthesised compounds were investigated revealing paramagnetic behaviour in whole investigated temperature range.

    статья (485,7 K)
  • 152. Novel peroxide containing pegylated polyampholytic block copolymers

    Synthesis of block copolymers via the polymerization of methyl methacrylate initiated by Ce4 - PEG system using a functional peroxidecontaining the services of an agent. Rheological and colloidal-chemical characteristics of new polyampholitic surfactant.

    статья (139,4 K)
  • 153. NН- и N-алкилформальдимины: электронное строение и барьеры инверсии атома азота

    Анализ квантово-химическими методами электронного строения N-алкилиминов, механизмов передачи электронных эффектов, факторов, влияющих на барьеры инверсии атома N. Двух- и четырехэлектронные взаимодействия, влияющие на изменение барьеров инверсии атома N.

    статья (368,4 K)
  • 154. Obtaining composite materials from tree production wastes

    The article discusses solutions to the problem of recycling wood waste and its use as a raw material for the production of new high-quality materials for industries. The purpose is to obtain composite materials containing wood waste and epoxy resin.

    статья (125,9 K)
  • 155. Obtaining of water-soluble complex salts of various fractions of synthetic petroleum acids and alcoamines, investigation of their effect on Triticum, Zea mays and Pisum sativum, and comparative analysis with natural petroleum acid complexes

    The purpose of our research is to summarize information about oil, the use of various fractions of natural and synthetic petroleum acids (boiling away in the ranges of 125-175°C, the synthesis of their water-soluble complex salts with alkanolamines).

    статья (1,8 M)
  • 156. Optical properties and XPS-characterization of Ag/Au bimetallic nanoparticles in porous sol-gel silica films

    Obtaining via hydrolysis of tetraethylorthosilicate in presence of template agent Pluronic P123 Ag/Au bimetallic nanoparticles in porous sol-gel silica films on glass. Definite amounts of AgNO3 and HAuCl4 by dip-coating procedure by a thermal treatment.

    статья (337,9 K)
  • 157. Optimization of 2,3-dimethylbuta-1,3-diene and 2-hydroxyethyl methacrylate cyclization reaction conditions

    On the basis of experimental studies and mathematical modeling, the choice of optimal conditions for 2,3-dimethylbuta-1,3-diene and 2-hydroxyethyl methacrylate cyclization reaction with obtaining of 2-hydroxyethyl-1,3,4-trimethylcyclohex-3-carboxylates.

    статья (219,1 K)
  • 158. Organometallic Chemistry of Polypyridine Ligands I

    Organometallic complexes of Non-Transition Metals with Scandium, Titanium, and Vanadium Group Metals, with Chromium Group Metals, with Three, Two and One Carbonyl Groups. Meaning of polypyridine ligands, especially the formation rhenium and ruthenium.

    научная работа (284,2 K)
  • 159. Organometallic complexes of the n2 (N, C) – coordinated derivatives of pyridine

    Non-transition elements. Titanium, vanadium, manganese, iron, cobalt, nickel group. Late transition and rare earth metals. Titanium and zirconium precursors give rise predominantly to the a-metallated species. Tantalum precursors non-transition elements.

    статья (474,7 K)
  • 160. Oрганическая химия алифатического ряда

    Основные положения теории химического строения А.М. Бутлерова, её значение для развития органической химии. Виды изомерии. Классификация ациклических соединений по виду функциональных групп, входящих в состав. Карбоциклические (алициклические) соединения.

    реферат (501,9 K)
  • 161. Palladium deposition on magnesium in PdCL2 solutions in dimethylformamide

    Change of palladium ions concentration during cementation on the magnesium disk in dimethylformamide solution. Chemical microparticles and agglomerates anorganic chlorine compound. Palladium adhesion to the substrate surface in dimethylformamide.

    статья (6,0 M)
  • 162. Partitioning of volatile halocarbons between surrogates for atmospheric solid aerosols and gas phase as examined by tpd ms and inverse gas chromatography

    The desorption non-isothermal kinetics of preliminary adsorbed Cl, Br, and I-containing volatile halocarbons from the surface of surrogates for atmospheric solid aerosols (fumed silica and alumina, silica gel and H-mordenite) was studied by TPD MS.

    статья (430,4 K)
  • 163. Photoluminescence study of Eu-species incorporated in lithium tetraborate and silica

    Analysis of spectral characteristics of a steady state (excitation and emission) spectra of photoluminescence of europium included in the single crystal and glassy lithium tetraborate and silica to distinguish oxidation, the site-symmetry and morphology.

    статья (192,9 K)
  • 164. Photovoltaic Cells based on Textured Silicon

    Technique of chemical etching as a promising method for creating nanostructures of si. The development of photovoltaic converters and methods of production resoursesaving for silicon micro - and nanostructures based on isotropic and anisotropic etching.

    статья (385,8 K)
  • 165. Phylogenetic study on structural elements of HIV-1 poly(A) region. 2. USE domain and TAR hairpin

    Phylogenetic study of the structural elements of poly(a) region of human immunodeficiency virus type 1 (HIV-1) to stimulate polyadenylation HIV-1 transcription and TRANS-activation response hairpin that combines space and uses the AAUAAA signals.

    статья (226,2 K)
  • 166. Physical-chemical constants and fatty acid composition of Zosima absinthifolia Link. fruit oil

    The aim of this study was to determine the quantitative and qualitative determination of fatty acids in the fruits of the plant Zosima absinthifolia, which is widespread in Absheron, as well as to study its physicochemical and organoleptic properties.

    статья (23,2 K)
  • 167. Physico-chemical characteristics and thermal stability of oil based lubricating fluids for glassware production

    Physico-chemical characteristics of I-40 and MS-20 commercial mineral oils. The use of such oils for the lubrication of molds in the manufacture of glass containers. The study of the thermal stability of oils and their fractions of hydrocarbons.

    статья (215,8 K)
  • 168. Polyethylene terephthalate

    Using polyethylene terephthalate in fibers for clothing, containers for liquids and foods, thermoforming for manufacturing. Polycondensation of oligomers and polymers in the solid phase, like in other methods of carrying out the polycondensation process.

    презентация (1,8 M)
  • 169. Potentiometric determination of «available chlorine» in electrochemically treated chlorinated electrolytes

    The role of the technique of volumetric titration with a working solution of sodium thiosulfate with a visual indication of the starch equivalence point during the analysis of the residual active chlorine. Evaluation of its advantages and disadvantages.

    статья (390,4 K)
  • 170. Preparation and characterization of iron complexes based on polysaccharides from agaricus bisporus

    The possibility of obtaining soluble iron complexes based on polysaccharides, Agaricus bisporus, maximum yields of samples. Nanoscale polycyclic complexes of ferric hydroxide and mushroom polysaccharides. The ability to use concentrated solutions.

    статья (600,4 K)
  • 171. Preparation and properties of cellulosic nanomaterials

    Hierarchical structure and multi-level organization of cellulose. Preparation of cellulosic nanomaterials. Mechanically-induced deconstructing strategy. Cellulose properties (mechanical, thermal, and barrier) that change during nanoscaling process.

    статья (1,5 M)
  • 172. Preparation and properties of hybrid poly(3,4-ethylenedioxythiophene)–carbon nanotubes composites

    It was investigated the infrared spectra of the hybrid composites poly. The current-voltage characteristics of the obtained materials. It is shown that increasing the content of carbon nanotubes leads to decrease of the resistance of hybrid films.

    статья (434,8 K)
  • 173. Production of ethylene oxide

    The use of ethylene oxide (EO) as a chemical intermediate. A suggested process flow diagram Ethylene Oxide Process. Process Details: feed, effluent, recycle streams, deliverables and grading. Economic analysis the equivalent annual operating cost.

    статья (109,2 K)
  • 174. Production of sorption active polypropylene fabrics with sulfonic acid groups by radiationinduced modification of polymer surface

    Synthesis of sorption-active material carrying groups 5% chlorosulfonic acid by radiation-induced graft polymerization of styrene monomer on the surface of non-woven polypropylene fabric with subsequent sulfonation of the grafted polystyrene chains.

    статья (119,8 K)
  • 175. Progress in elaboration of nonisocyanate polyurethanes based on cyclic carbonates

    Production and use of non-isocyanate polyurethanes based on cyclic carbonate oligomers. A suitable non-isocyanate polyurethane and a hybrid polymer comprising other different oligomeric systems. Pollution of unstable biuret and allophanate units.

    реферат (541,5 K)
  • 176. Quantification of group "B" vitamins by molecular spectroscopy in UV and visible regions in combined presence

    The absorption spectra of substances by vitamins solutions. The calculation of molar absorption coefficients. The spectrum of the triple multivitamin solution. Mass determination of B vitamins in polyvitamin. Spectrophotometric analysis of the components.

    статья (217,2 K)
  • 177. Quantum-dimensional effects in thermoelectric characteristics of lead chalcogenides nanostructures

    Thermoelectric parameters of the thickness of the layer of nanostructures in the approximation of the variable of the Fermi energy. The Seebeck coefficient, electrical conductivity and their dependence on the pit width for nanofilms of lead chalcogenides.

    статья (627,8 K)
  • 178. Radiation shielding properties nanocomposite materials prepared by sol-gel method

    SiO2 materials containing different magnetic fillers are obtained by the sol-gel method. It is studied the weakening of electromagnetic radiation in the frequency range 8–11.5 GHz by the materials obtained with the use of panoramic attenuation measurers.

    статья (184,6 K)
  • 179. Radiochemical study of biopolymers sorption on hydrophobic surfaces

    The behavior of globular proteins and humic acids of coal in aqueous/oil and aqueous/graphene systems by means of tritium tracer. Obtaining of adsorption isotherms by liquid scintillation spectrometry of tritium either in traditional performance.

    статья (165,7 K)
  • 180. Redox свойства и каталитическая активность в реакции окисления со медьсодержащих цеолитных систем

    Каталитическая активность образцов в реакции окисления монооксида углерода. Изучение способности к восстановлению ионов меди в медьсодержащих катализаторах методом термопрограммированного восстановления. Корелляция между температурами полного превращения.

    статья (17,8 K)

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