Search results

Innovative achievements in the field of mechanization of processes, composite materials and construction chemistry are primarily implemented in monolithic construction [2].
Modification of concrete mixtures with additives, as one of the methods of directed structure formation, has long been successfully used in the technology of monolithic and prefabricated construction in the production of reinforced concrete structures with high durability requirements [3, 11-13].
Analysis of the concretes’ strength characteristics on various cements indicates the ambiguous effect of modifying additives on the hardened composite structure.
When concreting monolithic structures from highly mobile modified mixtures with polyfunctional additives, the requirements for concrete care are increased [24].
Prigozhenko, Modified new generation concretes in the structures of the Moscow City International Business Center.

Their surface chemistry needs to be optimized to meet the requirements of host tissues, most desirable is that they are bioactive and form an interfacial bond with living tissues [7].
The morphological structure varies with the composition of the samples.
The high chemical durability of calcium phosphate phase can be explained by considering its structure.
McIntyre, D.E Day, Spectroscopic studies of the structure of titanophosphate and calcium titanophosphate glasses.
Materials Chemistry and Physics, 80 (3), 2003, 599–609

It is established that in the ternary system CeO2-La2O3-Yb2O3 fields of solid solutions based on cubic (F) modification of the structure of the structure of fluorite CeO2, monoclinic (B) and cubic (C) modification of Yb2O3 and hexagonal (A) modification of and with perovskite-type structure of LaYbO3 (R) with rhombic distortions.
The dark phase that makes up the matrix belongs to the ordered phase with a structure of the perovskite type LaYbO3, and the small amount of light phase was identified as a solid solution with a structure of the fluorite type Fig.10 a.
Also, the formation of a phase characterized by a rod-like structure is observed on these microstructures.
Scavini, Rare Earth Doped Ceria: The Complex Connection Between Structure and Properties, Front.
Rupp, A review of defect structure and chemistry in ceria and its solid solutions, Chem.

On the other hand, the exposure of cementitious systems to chloride ions causes corrosion of reinforcement bars that finally seriously shortens the service life of reinforced concrete structures.
Mehta K., 'CONCRETE: Structure, Properties, and Materials', Prentice-Hall, New Jersey, 1986 3.
Part 1: General Considerations and Reactions at Conventional Rates', 3rd Edition, Techniques of Chemistry, Volume VI, Wiley-Interscience, 1974, pp 129-209

A four-layered structure was formed, with the sequence of nHA-collagen-nHA-collagen from bottom to top.
Other seven are superior either in thinner coating structure or stronger bonding strength.
A scratch test is conducted by a micro tester (APEX, USA) for the evaluation of the adhesion strength of OICC structure.
A 2-layer HA/Col and 4-layer HA/Col structures were fabricated based on the concept of the OICC structure.
Both of the structures present a uniform coverage by the dispensing materials on the titanium surface and through the elemental distribution analysis by EDS, C and Ca/P appear at the desired positions according to the designed OICC structures.

From the observations of AFM measurement, it was found that the utilization of the external electric field resulted in the nano-structured two–phase structures in the resulting MWCNTs/thermoset nanocomposites.
The chemical structures of the main raw materials are shown in Fig. 1.
Fig. 1 The chemical structures of the main raw materials Nanocomposite preparation.
Applying AC electric field to a liquid suspension causes a redistribution of the MWCNTs, arranges them in chain-like structure and/or orients fibrous MWCNTs or chain-like structures along the field.
Furthermore, the nano-scale properties that control the various aspects of material performance can be different from the bulk properties because of differences in the local chemistry or microstructure [28].

The general structure based on neural networks that models the process work In this structure two neural networks are used.
Considering these aspects, the structure of each neuron from the hidden layer is presented in Fig. 3, respectively the structure of the neuron from the output layer is presented in Fig. 4.
The structure of each neuron from the hidden layer Fig. 4.
The proposed neural structure contains two neural networks connected in series, as it is shown in Fig. 2.
In the case of the training of the second neural network, the serial-parallel training structure is used.

The evolves of aggregation begins from tape strucutre→ribbon structure→fibril structure→fibre strucutre A tape structure is resembled to filament monolayer thickness of one molecule, while a ribbon structure is a two tape stack together by burying the hydrophobic face of the tape [7].
The Fibril forms by stacking several ribbon structure together and fibre structure can be formed by entangle two fibrils structure together [7].
Studies have shown that EAK 16-IV could form globular structure while EAK16-I and the EAK16-II formed fibrillar structure at neutral pH [15].
Amino acids with different hydrophobicity would permits the formation of α-helix and β-sheet structures, or β-sheet structure only [16].
N., Self-Assembling β-Sheet Tape Forming Peptides, Supramolecular Chemistry, 18(5), 435-443, 2006

Efforts in the past two decades have focused on metals with face-centered cubic (fcc) structures.
This phenomenon is closely related to the screw dislocation core structure in bcc metals.
These metals have bcc lattice structures, and are susceptible to interstitial impurities.
Schubert, Tungsten-Properties, Chemistry, Technology of the element, alloys and chemical compounds.: Kluwer-Academic/Plenum Publishers, 1998
Urban, "Microstructure Evolution and Grain Growth Kinetics in Annealed Nanocrystalline Chromium " Journal of Physical Chemistry C, vol. 111, pp. 5599 -5604, 2007

Such treatments may be divided into two main categories: (i) those which only involve microstructural modification e.g. laser hardening and laser melting and (ii) other processes which lead to dual changes in microstructure and surface chemistry such as laser alloying and laser cladding.
The hardness levels and the wear resistance that have been achieved are rather limited due to the sole dependence on the material structure [5].
On the other hand, the HAZ exhibits microhardness level of approximately HV 450, reflecting the combine of martensistic and remained ferritic structures.
The IZ is composed of epitaxial dendritic structures, irregularly mixed with a few WC particles.
Finally, the HAZ exhibits acicular martensite structure α´-Ti as a result of the transformation of the fully lamellar α+β microstructure of the substrate.