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коллекция "otherreferats"
Главная Коллекция "Otherreferats" Химия
  • 61. Cинтез, властивості та застосування пероксидних похідних заміщених бензойних кислот у фармацевтичному аналізі

    На основі фізико-хімічних досліджень підтверджених комп'ютерними розрахунками теоретично обгрунтовано та впроваджено новий оксидиметричний реагент – пербензойну кислоту. Опрацьовано методики визначення цистеїну, ацетилцистеїну, аскорбінової кислоти.

    дипломная работа (114,6 K)
  • 62. Cинтез, фізико-хімічні та біологічні властивості похідних 2-R-4(3Н)хіназолону(тіону)

    Синтез нових біологічно активних речовин в ряду похідних 2-R-4(3Н)хіназолону(тіону), вивчення їх будови, фізико-хімічних властивостей та реакційної здатності. Пошук ефективних і малотоксичних речовин з антиоксидантною, гепатопротекторною активністю.

    автореферат (111,4 K)
  • 63. Decoration of carbon nanotubes with cerium (IV) oxide

    Influence of synthesis conditions on ceria particles size. Anticorrosion properties of modified carbon nanotubes. Realization the synthesis in aqueous solution at room temperature that reduces the cost of the preparation procedure of nanosized ceria.

    статья (335,4 K)
  • 64. Design of metal sulfide electrode for hydrogen production by electrolysis

    Hydrogen evolution reaction (HER) is the cathodic hydrogen evolution reaction in electrolytic cell, but the hydrogen evolution catalytic properties of electrode materials best remains is the precious metal catalyst, has become the research hot spot.

    статья (3,0 M)
  • 65. Development of ecological pure production of sulphuric acid propylene hydration

    The use of cation exchanger as a catalyst for the esterification reaction of diisopropyl ether absolutes - a method for creating waste-free technology for the production of isopropyl alcohol. The physical-chemical properties of received esterificates.

    статья (9,3 K)
  • 66. Dielectric relaxation in Sr(Co1/3Nb2/3)O3 compound – a candidate for microwave applications

    Synthesis ferroelectric compounds Sr(B1/3Nb2/3)O3 by solid state reaction technique. Consideration of the correlation between the dielectric response and transport behavior. Emprovement dielectric material properties. Motion energy storage devices.

    статья (905,4 K)
  • 67. Dissolution kinetics of gold in cyanide solutions on the basis of plasma-chemically "activated" water

    Considers an opportunity and the effectiveness of using the solutions treated with low-temperature non-equilibrium contact plasma in order to intensify dissolution of metal gold in cyanide leaching solutions. Comparison of activation energies of the gold.

    статья (536,8 K)
  • 68. Effect of Structural Relaxation on the Metal–Insulator Transition in Heavily Underdoped YBa2Cu3O7-b Single Crystals

    The study of the effect of structural relaxation on the basal-plane conductivity of heavily high-Tc single crystals. Increased oxygen deficiency, increased localization effect. The transition metal–insulator transition point toward higher temperatures.

    статья (426,7 K)
  • 69. Effect of substrate temperature on the structural properties of CdxZn1-xTe films grown by close-spaced sublimation method

    Study films of CdxZn1-xTe solid solution, obtained by a close-spaced vacuum sublimation technique under different temperatures of glass substrate by energy dispersive analysis of X-rays, scanning electron microscopy and X-ray diffraction methods.

    статья (528,9 K)
  • 70. Effect of surface phenomena on selective separation properties of liquid crystal stationary phase

    The distribution of contribution of adsorption and dissolution to retention volume of individual components in gas-liquid chromatography as dependent on the amount of liquid crystal stationary phase deposited on solid support and on the temperature.

    автореферат (92,9 K)
  • 71. Effect of the low-molecular additives nature on the adhesive properties of based on polyvinylpirolidone compositions

    The influence of low-molecular additives on the composition of polyvinylpyrrolidone with hydroxyethyl compositions. Adhesion based on the angle of wetting compositions. The effect of different additives on the adhesive strength of the adhesive joint.

    статья (138,8 K)
  • 72. Effects of surfactants on the properties of mortar

    The chemical structure of the polymer latexes. The influence of surfactants on the drip solution. The mechanism of anionic with a negative charge in the screed, acting as air entrainment. Hydrogen bonding, water absorption and compressive strength.

    статья (1,2 M)
  • 73. Electrosynthesis of poly (selenophene-co-thiophene) films in boron trifluoride diethyl etherate/ethyl ether

    Effect of polymerization copolymers on selenophenes and thiophenes. Analysis of electrosynthesis of selenofen-thiophene copolymers at a constant electrode potential. Stability of oxidation-reduction activity in electrolyte solution based on acetonitrile.

    статья (244,2 K)
  • 74. Evolution of Fe-Pd solid solution composition in one-step metal-carbon nanocomposite fabrication method

    The one-step procedure of simultaneous preparation of polyacrylonitrile-based carbon support and Fe-Pd bimetallic nanoparticles. The effect of synthesis conditions on the metal-carbon nanocomposite structural characteristics. The crystallite size.

    статья (400,5 K)
  • 75. Features of Ni/NiO nanopowder synthesis by thermal decomposition of nickel acetate amines: effect of annealing temperature and duration and ammonia content on powder composition and particle size

    The using nickel powders as electrode materials in multilayered ceramic capacitors. Development of technology of Ni/NiO nanopowders obtaining with particle size of 20 nm and minimal impurities content. The analyses of powder microstructure the products.

    статья (522,0 K)
  • 76. Flow Control in Oil/Gas Wells and Pipelines

    Introduction to flow control. Multi-phase flow with emphasis on slug flow. Stabilization of flow in Oil/Gas wells and pipelines. Trends and Facts in Oil and Gas Production. Callenges for Deep Water Developments. Slug reduction/elimination techniques.

    доклад (2,7 M)
  • 77. Fluorine-containing Heterocycles

    Applications heterocyclic compounds; approaches to synthesis. Familiarization with effective conversion of organic compounds into valuable fluorinated products. The use of fluorinated triazoles for the protection of metals and alloys from corrosion.

    научная работа (456,6 K)
  • 78. Functional analysis of experimental data in the field of modern researches of neutral macrocyclic antimycotic filipin

    Biological, physical and chemical properties of macrocyclic compounds based on the researches of membrane activity. Finding of the certain concentration of filipin for increase of conductivity, definition of selectivity and single ionic filipin channels.

    статья (98,2 K)
  • 79. Functions fillers and additives for polymers

    Chemical identification of polymer additives and its significance for links in the plastics supply chain. The effect of additives on the properties of materials and on the cost of production of polymers. Quantitative determination of polymer additives.

    статья (13,5 K)
  • 80. Glucose biosensors - state of the art and prospects

    Rapid determination of glucose concentration in technical and biological systems as an important scientific and technical task of modern chemistry. Review of the latest technical solutions in this area. Problems of developing first-generation biosensors.

    статья (27,2 K)
  • 81. H2S-зв’язаний нестероїдних протизапальних препарат АТВ-346 володіє зниженою гастротоксичністю порівняно з впливом його структурного аналога напроксену

    Вплив неселективного інгібітора напроксену і його структурного аналога, який містить гідроген сульфід, на процеси ліпопероксидації та продукції нітроген оксиду. Відзначення гастропротекторної дії, що проявилась зменшенням площі пошкоджень шлунка.

    статья (376,0 K)
  • 82. Homologation of heterocycles by a sequential reductive opening lithiation–electrophilic substitution–cyclization

    Reductive opening of heterocycles as a source of functionalized organolithium compounds. Methods for homologation of heterocycles. Double lithiation of thianthrene. Phthalan: a versatile starting material. Homologation of six-membered heterocycles.

    статья (195,8 K)
  • 83. Hydrodynamics modeling of gas separator inertial and filter elements for natural gas fine cleaning

    The trends in the development of modern gas separation equipment have been considered. On the basis of computer modeling the optimal size of the device has been obtained. Reasonable choice of a computer and mathematical experiments has been shown.

    статья (549,0 K)
  • 84. Hydrogen bond network in liquid water and assessment of indicators of its restructuring under the external influence

    The way to save part of the energy released when hydrogen bonds are formed in the form of the energy intensity of their mesh. Conditions for the onset of synchronous transitions of protons from single molecules to molecules of the H-bond network.

    статья (104,5 K)
  • 85. Hydrogen sulfide adsorption from natural gas and its treatment

    The research conducted in the field of adsorption-catalytic extraction of H2S from low sulfurous natural gases and conversion into elemental sulfur using the synthetic CaA zeolite and natural modified adsorber mordenite as well as the palladium catalyst.

    статья (252,6 K)
  • 86. Impact of cadmium on the growth and development of pinus sylvestris

    Features of the laboratory experiment with exposure to cadmium salt solution and growth processes peroxidise activity in seedlings Pinus Sylvestris. Features of influence of cadmium ions on peroxidise activity and accumulation of 15-day-old cultures.

    статья (210,9 K)
  • 87. Influence of calcination regimes on phase formation and magnetic property of nanopowders BiFeO3 synthesized by sol-gel method using citric acid

    Specific features of measuring the magnetic hysteresis of nano-sized multiferroic BiFeO3 powders synthesized by sol-gel method using citric acid at room temperature. Characterization of the main magnetic parameters of the obtained nanopowder samples.

    статья (714,5 K)
  • 88. Influence of fine-grinded glass additives on the induction and post-induction periods of Portland cement hardening

    Chemical compositions of Portland cement. Possibility of using waste glass in building technology. A structure alkaline compounds. Study of fine-grinded glass. Influence additives on the induction and post-induction periods of Portland cement hardening.

    статья (167,8 K)
  • 89. Influence of some physico-chemical factors on the biosynthesis of amylolitic enzymes of streptomycete origin

    Selection of the composition of a simplex nutrient medium by mathematical modeling. Optimization of the biosynthetic ability of the streptomyces recifensis strain for the synthesis of amylolytic enzymes. Influence of physical and chemical factors on it.

    статья (102,7 K)
  • 90. Influence of stress-dependent surface generation of interstitials on stacking fault growth and dopant diffusion in silicon

    Main calculation of activation volumes for interstitials and vacancie. Diffusion equations for point defects. Surface generation and recombination of point defects. Simulation of stacking fault growth. Simulation of stress-nediated dopant diffusion.

    статья (565,9 K)

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