Materials Literature
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Natural frequencies of oscillations of the hinged fragment consisting of a hollow-core slab of reinforcedconcrete flooring, embedded on end faces in a girt strip have been analyzed. Both the initial calculation model of the fragment in a slab-beam system form and its simplified model in the bar system form have been e…
Degrees of branching were measured with 13C melt-state NMR in poly(n-butyl acrylates) synthesized in both the presence and absence of 1-octanethiol at various temperatures, and their precision calculated based on the signal-to-noise ratio of the quaternary carbon at the branching point. Nitrogen gas was used for all p…
Abstract Amino acids and self assembled monolayers (SAM’s) have been studied as to their inhibiting action on the corrosion of metallic materials. The objective of this work is to study the electrochemical behavior of the cisteincisteine, the diphosfonate and the mixture of both in inhibiting the action of corrosion o…
Causes of the origin of dіrect and reverse indentation size effect at determination of material hardness by indenters of different geometry are considered.
The present communciation deals with four taxa of Mesotaenium Nageli viz. Mesotaenium macrococcum (Kutzing) Roy and Bissette, M. chlamydosporum de Bary va, M. chlamydosporum var. minus (Reinsch) West and West and M. degreyii Turner var. breve. All of which are reported for the first time from West Bengal of these the…
Spo0A, DegU, CcpA, приводят к потере чувствительности экспрессии гена gseBi в отношение глюкозо-катаболитной репрессии.The expression of the Bacillus intermedius glutamyl endopeptidase gene was investigated for different length of its regulatory region. It was proved that the change of the length of the promoter regio…
In the whole design process of a reflectarray antenna, the part that demands more CPU time is that related with the optimization of the patches dimensions. For real reflectarrays with thousands of elements where the design of the antenna involves optimization of the dimensions of each element until the phase requireme…
Features of the process of deformation of extruded blanks made of dispersion-reinforced copper are considered in the article. Curves of strengthening of alloys on the basis of copper at stretching at temperatures 600…800 0С are given in the article. The results of tests made it possible to establish that the tested ma…
The research paper describes the mathematical model of the three-port flow regulator of the hydraulic steering booster of the MAZ-type vehicles. The dependences of static characteristics of the regulator upon the pump output and operating fluid viscosity are studied. The influence of design parameters of the regulator…
National Basic Research Program of China (973 program)(GrantNo. 2007CB607606);the Innovative Group Foundation from NSFC (GrantNo. 50721062);the important direction project for the knowledge innovative engineering of Chinese Academy of Sciences (Grant No. KGCX3-SYW-205)
The dependence of the cohesion energy and solubility of a small particle on its size is considered. The peculiarities of surfactant micelles behavior are discussed: a dramatic passage to micellization at small concentrations, the absence of properties of nuclei of macroscopic phases, not obeying the OstwaldFreundlich…
КОНТАКТНАЯ ЗАДАЧА ДЛЯ ШТАМПА НА УПРУГОМ КЛИНЕ СО СВОБОДНЫМИ ГРАНЯМИ Инж .Д М И ТРИ ЕВА К
In the paper, a theoretical study of the transport properties of double walled graphene with the different structure of the layers relative to each other has been carried out. The band structure of the system and the variation of conductivity depending on the different configurations of graphene layers have been revea…
Now it is considered to apply the technology of concreting and of warming-up of framed buildings junctures with using of rod and stringed electrodes in winter conditions. Analytical investigations results of thermal parameters of warming-up, heat flow density and heat loss into environment have been presented. A techn…
In present paper, the fusion of metal nanocrystals on TiO2 nanowires is studied and utilizedto synthesize bimetallic nanoparticles on nanowires. Cationic polydimethyl aminoethylmethacrylate (PDMAEMA) brushes are grafted onto TiO2 nanowires, and palladium nanocrystalsare produced by polymer brush-bound PdCl42 and subse…
The method allows to calculate force and geometrical characteristics for a wing of set-net with rigid frame and for its elements (dead anchors, piles) in the range 10 Ј Re; 0,004 Ј Fo Ј 0,165; 0,10 Ј h1/S1 Ј 0,98; 0,05 Ј l1/S1 Ј 0,85; 0,10 Ј h2/S2 Ј 0,98; 0,05 Ј l2/S2 Ј 0,85; 0,2 Ј c1 Ј 3,5; 0,2 Ј c2 Ј 3,5. It is base…
the National Nature Science Foundation of China (No. 50773089, No. 50835009);the National 973 Project (No. 2007CB607601)
The tribological properties of the nano-eutectic Fe1.87C0.13 alloy are investigated under dry-sliding againsAISI52100 steel ball in ambient environmentwith varying applied load and sliding speed. As comparisonthe tribological properties of the same alloy after annealing treatment, which is with coarse-grainedmicrostru…
Basic operation factors of the deformed gas-lubricated thrust bearing with increased bearing capacity are theoretically analysed. It is shown that steady-state operation characteristics of this bearing differ from those of the rigid bearing.
Fluorinatedmethacrylic copolymer containing catechol and perfluoroalkyl pendant side groups is synthe-sized by the free radical polymerization of a catechol-containing methacrylate monomer N-(3,4-dihydroxyphenyl)ethyl methacrylamide and 1H,1H-perfluorooctyl methacrylate using a,a0-azobisisobu-tyronitrile (AIBN) as initi…