Индекс цитирования

Авторизация






Lost Password?

Cover of magazine

News

(11/10) Ученые из ИФХЭ РАН и МГУ под руководством Ольги Виноградовой поняли, как «полосатая» гидрофобность..
Sorry this content is not available in your selected language....
Read More ...
(11/10) Ученые обнаружили пути проникновения вирусов гриппа и ВИЧ в организм
Sorry this content is not available in your selected language....
Read More ...
(17/04) Курс “Анализ геномных данных”, Москва, 2 – 11 июля 2012
Sorry this content is not available in your selected language....
Read More ...
(12/03) Впервые получено изображение атомов, движущихся в молекуле
Sorry this content is not available in your selected language....
Read More ...

 

Results 41 - 50 of 134
41.

Influence of the Composition of the Liquid Phase and the Concentration of Benzohydrazide on Its Effectiveness during Cadmium Electrodeposition from Waterframe0Acetone Perchlorate Electrolytes

V. V. Kuznetsov, L. M. Skibina, and R. R. Khalikov 
Сохранить

 

Department of Chemistry, Southern Federal University, ul. Zorge 7, Rostov-on-Don, 344090 Russia

E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Received May 3, 2007

 

Abstract — Cadmium–benzohydrazide complexes (2 : 1) were found to be the main electroactive species in cadmium electrodeposition from water–acetone perchlorate baths. The discharge of these complexes is preceded by their dissociation at the cathode (zone of water structure stabilization) or in the bulk of the solution (zone of acetone structure stabilization). In the microheterogeneity zone of the mixed solvent, the complexes can be reduced from the adsorbed state. The process is best inhibited at low concentrations of benzohydrazide (frame1 = 10frame24 mol/l), when the electrode is covered with a very dense layer of adsorbed benzohydrazide and acetone molecules. With an increase in frame3, perchlorate anions become more adsorbable, which is accompanied by increasing facilitation of the discharge reaction ('-effect). The strongest depolarizing effect of Clframe4 anions is observed in the zone of acetone structure stabilization, which is due to selective solvation of the anion and the desalting effect of the mixed solvent.

 

PACS numbers: 82.45.-Qr

DOI: 10.1134/S2070205109030034
22/06/2009 | 984 Hits | Print

42.

Comparative Analysis of the Adsorption of the Stereoisomers of Hydroxy- and Dihydroxyproline at Graphitized Thermal Soot

E. S. Kuznetsova, A. V. Ul’yanov, and A. K. Buryak

 

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia

E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Received June 5, 2008

 

Abstract — The thermodynamic characteristics of the adsorption of proline and its derivatives at graphitized thermal soot (GTS) were determined. It was found that the arrangement of the hydroxy groups in the amino acid molecule influences its adsorption at GTS. The thermodynamic characteristics of the adsorption of the stereoisomers of hydroxy- and dihydroxyproline at GTS were calculated. The influence of the internal rotation angles in the molecules of proline and its derivatives on their adsorption at GTS was studied.

 

PACS number: 68.43.De

DOI: 10.1134/S2070205109030046
22/06/2009 | 949 Hits | Print

43.

Determination of the Flory - Huggins Parameter for a Pair of Polymer Units from AFM Data for Thin Filmsof Block Copolymers

E. A. Men’shikov1,2, A. V. Bol’shakova2, and I. V. Yaminskii2

 

1 Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow,
119991 Russia

2 Faculty of Physics, Moscow State University, Moscow, 119992 Russia

E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Received March 6, 2008

 

Abstract — The structures of thin films of the polystyrene–polybutadiene–polystyrene (SBS) and polystyrene–poly(methyl acrylate)–polystyrene (SMAS) triblock copolymers were studied. The film morphology was found to depend on the conditions of film formation. The average domain sizes of these films and the period of the lamellar structure of SMAS films were determined. The Flory–Huggins parameter was estimated for a pair of styrene and methyl acrylate units.

PACS numbers: 87.64.Dz

DOI: 10.1134/S2070205109030058
22/06/2009 | 968 Hits | Print

44.

Electrocrystallization and Physicochemical Properties of Nanosized Copper-Containing Powders

S. A. Chulovskaya1 and V. I. Parfenyuk2

 

1Institute of Chemistry of Solutions, Russian Academy of Sciences, Akademicheskaya 1, Ivanovo, 153045 Russia

2Ivanovo State University of Chemistry and Technology, pr. F. Engel’s 7, Ivanovo, 153000 Russia

Received November 16, 2007

 

Abstract — The electroctystallization mechanism of copper-containing powders from water–isopropanol solutions of copper dichloride is studied. The effect of the nature and concentration of solution components on the electroplating of cathodic deposits is considered. Morphological characteristics of particles of the synthesized powder are determined on a transmission electron microscope. The qualitative composition of synthesized powders is determined.

 

PACS number: 81.07.Wz, 81.07.-b

DOI: 10.1134/S207020510903006X
22/06/2009 | 925 Hits | Print

45.

Corrosion Protection of Mild Steel by Applying TiO2 Nanoparticle Coating via Sol-Gel Method1

A. Shanaghi, A. R. Sabour, T. Shahrabi, and M. Aliofkhazraee

 

Surface Engineering Laboratory, Materials Engineering Department, Faculty of Engineering, Iran, Tehran, Tarbiat Modares
Unversity, P.O. Box: 14115–143

e-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Received November 2, 2007

 

Abstract — TiO2 nanoparticle coatings possess good thermal and electrical properties and they are resistant to oxidation, corrosion, erosion and wear in high temperature environments. This property is very important factor in the applications such as pipelines, castings and automotive industry. In this investigation a uniform TiO2 nanoparticle coating has been applied on mild steel, using sol-gel method. The coating was deposited on mild steel substrate by dip coating technique. The morphology and structure of the coating were analyzed using SEM, AFM and X-ray diffraction. The anticorrosion performances of the coating have been evaluated by using electrochemical techniques. It is worthy to note that the film uniformity was retained in high temperatures and no crack and flaking off from the substrate was observed. The Tafel polarization measurements provide an explanation to the increased resistance of TiO2 nanoparticle coated mild steel against corrosion and icorr was decreased from 18.621 to 0.174 A/cm2.

 

PACS numbers:

DOI: 10.1134/S2070205109030071
22/06/2009 | 924 Hits | Print

46.

Composite Electrochemical Coatings: Preparation, Structure, Properties

V. N. Tseluikin

 

Engels Technological Institute (Affiliated Branch) of Saratov State Technical University,
pl. Svobody 17, Engels, Saratov Oblast’, 413100 Russia

Received May 19, 2008

 

Abstract — Results of studies in the field of electrochemical composition coatings (ECC) are presented. Methods of synthesis, functional properties, and structural peculiarities of the main types of ECC are considered.

PACS numbers: 81.05.Ni, 82.45.Qr

DOI: 10.1134/S2070205109030083
22/06/2009 | 1046 Hits | Print

47.

PbO2frame0TiO2 Composite Electrodes

A. B. Velichenko1, V. A. Knysh1, T. V. Luk’yanenko1, F. I. Danilov1, and D. Devilliers2

 

1 Ukrainian State University of Chemical Technology, pr. Gagarina 8, Dnepropetrovsk, 49005 Ukraine

2 Pierre and Marie Curie University (Paris 6), pl. Jussieu 4, Paris, 75252 France

E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Received May 20, 2008

 

Abstract — Electrodeposition of composite PbO2-based materials containing titanium dioxide particles was studied. The TiO2 content of the composite depends on the bath composition and the deposition conditions. Inclusion of TiO2 particles in PbO2 substantially changes the morphology and structure of the deposit. The oxygen overpotential at composite materials increased but the rate of the conversion of 4-chlorophenol into nontoxic compounds remained virtually unchanged. The lifetime of the electrodes containing the inert TiO2 phase was found to be twice as long as that of traditional PbO2 anodes.

PACS numbers: 81.05.Ni, 82.45.Qr

 

DOI: 10.1134/S2070205109030095
22/06/2009 | 1093 Hits | Print

48.

Solving Modern Problems of a Coatingframe0Substrate System in a Viscoelastic Approximation

N. O. Gonchukova

 

Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Adm. Makarova 2, St.-Petersburg, 199034 Russia

E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Received November 19, 2007

 

Abstract — Calculated stresses in amorphous metallic coatings, which were produced by plasma spray method and chemical deposition, are discussed. These coatings may serve as wear- and corrosionresistant coatings and magnetic shields. The calculations of stresses are carried out for composites containing chalcogenide glasses, which are used in electronics and optics.

PACS numbers: 68.60.Bs

 

DOI: 10.1134/S2070205109030101
22/06/2009 | 1042 Hits | Print

49.

The Effect of 3-Methyl 1-Pentyn 3-Ol on the Corrosion of Al-Si-Cu Alloys in Acid Solutions by Using SEM, EDX and AAS1

A. Buyuksagisa, A. A. Aksutb, and D. Ozala

a Afyon Kocatepe University Science and Art Faculty, Afyonkarahisar/TURKEY

b Ankara University Science Faculty Chemistry Department Ankara/Turkey

*e-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it , This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

22/06/2009 | 826 Hits | Print

50.

The Effect of Natural Ageing of Quickly Quenched Amorphous  Fe75Si12B10Nb1Cu2 Alloys on Their Corrosion Behavior sin Acidic Sulfate Environments

V. G. Makletsov1 and O. M. Kanunnikova2

 

1Udmurt State University, ul. Universitetskaya 1, Izhevsk, 426034 Udmurtia, Russia

2 Physical-Technical Institute, Ural Branch, Russian Academy of Sciences, ul. Kirova 132, Izhevsk 426000, Udmurtia, Russia

E-mail: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Received April 18, 2007

 

Abstract — The effect of natural ageing on the electrochemical and corrosion behavior of an amorphous Fe75Si12B10Nb1Cu alloy in acidic sulfate environments is studied. In its shape, the polarization curve is similar to that of the alloy, which was heat treated at 400frame0C. The ageing made the alloy brittle and unable to be soldered with acidic fluxes.

PACS numbers: 82.45.Yz

 

DOI: 10.1134/S2070205109030125
22/06/2009 | 1010 Hits | Print

  

Powered by AlphaContent 3.0.4 © 2005-2022 - All rights reserved