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коллекция "otherreferats"
Главная Коллекция "Otherreferats" Химия
  • 181. Peculiarities of the physico-chemical interaction in ternary systems of magnesium with two rare-earth metals of different subgroups

    This work analyzes ternary phase diagrams of magnesium with two rare-earth metals of different subgroups, conducted in IMET RAS in connection with the development of high-temperature magnesium alloys. A lot number of phase diagrams were discovered.

    статья (287,8 K)
  • 182. pH-sensitive hybrid hydrogel materials with incorporated nanoparticles

    Study of swelling kinetics as compared to solvents of various nature (water in various pH, ethanol, toluene) was carried out. IR comparative spectra were obtained for different composites. High anti-bacterial action of the synthesized nanocomposites.

    статья (606,6 K)
  • 183. 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)
  • 184. 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)
  • 185. Physico-chemical and sorptive properties of nanocomposites based on zirconium(IV) oxide

    Homogeneous precipitation synthesis of nanocomposites - activated carbon – zirconium(IV) oxide. Characterization of samples by x-ray diffraction analysis and electron microscopy. Sorption properties and the degree of extraction of phosphate ions.

    статья (403,5 K)
  • 186. 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)
  • 187. Physico-chemical properties and efficiency of demulsifiers based on block copolymers of ethylene and propylene oxides

    The use of block copolymers on the basis of oxides of ethylene and propylene as demulsifiers of oil emulsions. Determination of the dependence of their physico-chemical properties from the content oxyethylene and oxypropylene groups in the molecule.

    статья (780,3 K)
  • 188. Piezoelectric response of cadmium sulfide nanorod crystals grown from gas phase by using Ag and Au catalyst

    Describes macroscopic of piezoelectric response of a macroscopic array of nanorod crystals of cadmium sulfide. Research of irregular shape of six-sided polyhedron and demonstrate piezoelectric response similar to their counterpart crystals grown.

    статья (638,2 K)
  • 189. Pilot-scale methane degradation biocover at operating landfill

    Proving that MBT fine fraction is fit-to-use as functional material for methane degradation layer. Confirmation of the methane degradation efficiency in fine MBT fraction is important from the ecological point of view. The use of a fine fraction.

    статья (237,8 K)
  • 190. 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)
  • 191. 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)
  • 192. Preparation, structural and optical characterization of ZnO / Ag thin film by CVD

    Research transparent conducting n-type semiconductor zinc oxide films, which have been extensively studied in recent year because they exhibit wide band gap. Analysis of scanning electron microscopy which used for study of surface morphological changes.

    статья (519,2 K)
  • 193. 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)
  • 194. 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)
  • 195. Properties of isomorphs analogs of chrysotile

    Determine the optimal parameters of synthesis and base properties of nano-tubular crystals Mg-Ni chrysotiles. temperature ranges and pressure for the synthesis of nano-tubular crystals all synthesed chrysotile at the time of isothermal exposure.

    статья (297,9 K)
  • 196. Pt-ru низкопроцентные катализаторы в процессах селективного каталитического окисления, паровой и парокислородной конверсии метана

    Применение Pt, Ru и Pt-Ru катализаторов в реакции дегидрирования, селективного каталитического окисления метана и парокислородной конверсии СН4. Возможные изменения конверсии СН4 в реакциях СКО, парокислородной конверсии и термическом разложении СН4.

    статья (59,0 K)
  • 197. Pyrazol-3-ones. Part II: Reactions of the Ring Atoms

    By Reaction with Alkyl Halides. Nucleophilic Addition. Oxidation of Ring Carbon Atoms Followed by Addition. Reduction of Exocyclic Double Bonds. Ring Cleavage Reactions. Coupling of Pyrazol-3-ones with Aryl Diazonium Salts. Oxidative Coupling, silylation.

    учебное пособие (936,4 K)
  • 198. QSAR-аналіз похідних піридинкарбонових кислот як протитуберкульозних агентів з використанням методів квантової хімії

    Проведення розрахунку квантово-хімічних дескрипторів 9 похідних піридинкарбонових кислот методом АМ1. Описання залежності між електронно-просторовою структурою досліджуваних сполук і їх протитуберкульозною активністю з використанням QSAR-моделей.

    статья (119,5 K)
  • 199. Quantum-chemical calculation of modified silicon-contained zeolite clusters electronic structure by zink and calcium ions

    Combination of methods quantum chemistry. Geometrical and electronic structure of clinoptilolite clusters modified by zinc and calcium. Redistribution of electronic density on the oxygen atoms of clusters during formation of bonds with zinc and calcium.

    статья (160,9 K)
  • 200. Quinuclidine derivatives (aceclidine, oksilidin, phencarolum) and quinazoline (prazozine). Quality requirements, methods of analysis

    Physical and chemical properties of the drugs. Reactions to chloride ions Cl- in a solution of AgNO3 in HNO3. Photocolorimetry with painted ferum hydroxamate. Reaction on heterocyclic atom of nitrogen. Using of methods of quantitative determination.

    презентация (1,9 M)
  • 201. 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)
  • 202. Reactions of 1-(4-hydroxyphenyl)-3-(4-nitrophenyl)-5-ethyl-1,2,4-triazole with electrophilic agents

    To synthesize new biologically active compounds, the reactions of electrophilic substitution of 1-(4-hydroxyphenyl)-3-(4-nitrophenyl)-5-ethyl-1, 2, 4-triazole (I) have been studied. The structure of the new compounds was confirmed by 1H NMR spectra.

    статья (86,5 K)
  • 203. Recombination losses in solar cells based on n-ZnS(n-CdS) / p-CdTe heterojunctions

    Research and characterization of the most common used solar cells which are based on silicon technology. Determining width of the space charge region and quantum yield of solar cells. Influence and analysis of recombination losses on efficiency.

    статья (556,3 K)
  • 204. 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)
  • 205. Regularities of the influence of submicron ceramic powders TiО2, AlN, Cr2О3 on the tribological properties of a friction material

    Friction units for automotive and special vehicles are designed to operate under friction conditions. The development of a unified understanding of the effect of the size and chemical nature of ceramic additives on the processes occurring in a friction.

    статья (1,1 M)
  • 206. 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)
  • 207. Research of polycomplexes’ membranes on the basis of sodiumcarboxymethylcellulose

    Study of the reaction of polyelectrolytes. Research of the structure and membrane properties of sodium carboxymethylcellulose and urea-formaldehyde oligomer. Development of technology for manufacturing biocompatible polymeric materials for medicine.

    статья (88,7 K)
  • 208. Review of graphene properties in view of its use as a substrate for matrix-free mass spectrometry

    The graphene basic properties is given. The possible role of intrinsic and deliberately induced structural defects in electronic and chemical properties of graphene substrates. Optimized geometric structures for the Stone-Wales defect functionalized.

    статья (337,5 K)
  • 209. Ring Transformationof NitropyrimidinoneLeading to Versatile Azaheterocyclic Compounds

    A review on novel ring transformations of dinitropyridones and nitropyrimidinones. The synthesis of functionalized molecules, such as nitroanilines, nitropyridines by the ring transformation of dinitropyridones as the nitromalonaldehyde equivalent.

    научная работа (6,9 M)
  • 210. RR-винная кислота и её производные

    Описание свойств RR-винной кислоты и её производных, в качестве лигандов различных металлов. Расширение познаний в области химии. Составление представлений о гидролизе органических соединениях. Экспериментальное получение производной винной кислоты.

    реферат (510,8 K)

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