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Online since: January 2015
Authors: Igor Sakharov, Vladimir Paramonov
Definitely, the cities shall develop, which suggests construction of new buildings, normally with parking basements, sometimes as deep as a number of levels.
The frost-penetration soil, except the coarse-grain ones, is characterized by propagation of frost heaving deformations.
By the physical soil parameters including humidity at the plastic limit Wp, plasticity number IP and Kd (compacting factor depending on the loam soil dispersion ability and compacting pressure at defrosting).
Interrelationship of the principal phisicomechanical and thermophysical properties of coarse-grained frozen soil (1979) Eng.
Online since: January 2009
Authors: Andrzej Szczepankowski, Janusz Szymczak, Jaroslaw Spychała
a) Sulfide-oxide corrosion centre on the attack edge of the blade, b) Corrosion pits and losses of material caused by its chipping off on the attack edge of the blade Another form of a local damage of the hereto discussed unit in conditions close to the previous ones is intercrystalline corrosion, and changing chemical contents of the alloy at the border of grains.
But our experiences indicate that an increase of a tendency of this type o alloys to intercrystalline corrosion is highly influenced by work of a device in changing temperature conditions and periodically exceeding its allowable value, which results in lower contents of chrome in the material overheating zone and presence of relatively large carbides on the grains border.
Subsequently following after each other a) ÷ f) phases of degradation of turbine rotor scoop blade In Fig. 10 (a ÷ b), visible are damages of the surface protective layer of the blade attack edge, however, their surface area grows alongside of the height of the scoop together with a number of hours worked by TSO (Fig. 10b).
Research testing and production of new materials and improvement of construction designs of turbines units, and thus their cooling systems, or technology of making thermal barriers have been and will continue to be new challenges for a great number of scientists and engineers.
Online since: September 2009
Authors: A. Shaaban, Mona F. Ali, A. Turos, A. Korman, Anna Stonert
The tomb is 125 meters long and follows the typical plans of the Nineteenth Dynasty's tombs, though it has an unusual number of annexes.
The "in vacuum" mode has the advantage of detecting low atomic number elements [6].
Since pigment grain sizes are usually of the order of 100 µm and the range of 3 MeV protons in typical pigment compound is about 5 µm µ-PIXE allows analysis of a single grain composition without any interference of the substrate and neighboring pigments or binder.
Online since: January 2006
Authors: Yuriy S. Nechaev, G.A. Filippov
Therefore, the urgent "open" questions can be formulated, as follows: • Physical reasons of an anomalous scattering (2-3 orders of magnitude) and non- or poor reproducibility of experimental data on the hydrogen sorption by novel carbon nanomaterials (CNs); • A poor knowledge on characteristics and nature of the hydrogen sorption by CNs; • A poor knowledge on characteristics and mechanisms of hydrogen diffusion - the ratecontrolling stage of a number of the desorption process.
«Dissociative-associative» chemisorption of H2 in the inter-grain or defected (surface) regions ("reactions" (13)-(16) in [3]).
As is also shown [3,6,7], the hydrogen bulk and "grain boundary" concentrations in specimens [8] (after a fast release from them of ∼70 % of adsorbed hydrogen) are about of a "carbohydride" value (H/C ∼ 1); a similar situation is in specimens [11,19,20].
Conclusion In a number of scientific and technological investigations, the hydrogen sorption processes in carbon nanomaterials are rate-limited by the hydrogen diffusion transport.
Online since: March 2008
Authors: R. Caram, Giorgia T. Aleixo, C.R.M. Afonso, A.A. Coelho
However, a number of investigations have shown that V reacts with live tissues, while Al may be connected with neurological disorders and Alzheimer's disease [2].
This acicular martensite is composed of a number of α platelets with different crystallographic characteristics.
When the same sample was cooled in air, the resulting microstructure comprised a β phase matrix with α phase precipitated in a continuous layer along the β grain boundaries.
As expected, α phase precipitation occurred, but it was less intense than in the same sample cooled in the furnace and was restricted to grain boundaries.
Online since: November 2012
Authors: Dong Mei Luo, Peter Hodgson, Cui'e Wen, Ying Long Zhou, Yun Cang Li
After that, MTS assay, a colorimetric assay was used to measure the cell number in each well.
The grow factor of the cells on the Mg alloys was defined as the ratio of the live cell number in extraction media to that of the control.
It is considered that the as-cast microscopic segregation and cast deflects of metallic materials accelerate the corrosion [20,21] and fine grains can create more grain boundaries that act as corrosion barriers and accordingly enhance the corrosion resistance of Mg alloys [22-25].
Online since: March 2012
Authors: H. Panritdam, Juntima Chungsiriporn, S. Te-Chato, Lek Sikong
A large number of techniques have been used to prepare of TiO2 nanoparticles such as sol–gel, hydrothermal method and spray deposition.
Finally, as received powders were ground using mortar in order to reduce the agglomerate grains and then calcined at 500 °C for 2 h with a heating rate of 10°C/min.
Fig. 1 XRD patterns of (a) TP, (b) TS, (c) TSN10 (d) TSN20, (e) TSN30 and (f) TSN40 powders Fig. 2 SEM images of (a) TP, (b) TS, (c) TSN10 (d) TSN20, (e) TSN30 and (f) TSN40 powders (magnification 40,000x) FT-IR spectra of all the synthesized titanium dioxide powders in the range 4000-400 cm-1 wave number are shown in Fig. 3.
The addition of nitrogen atoms influences on crystallite and grain sizes and crystallinity of the anatase phase, resulting in a good photocatalytic activity of SnO2/N – doped TiO2 photocatalyst.
Online since: February 2007
Authors: Balázs Verő, Jenő Sólyom, A. Takács-Szabó
The area ratio corresponds to the quotient of the number of detected pixels within the field of vision and the size of the measuring frame, where the size of the measuring frame certainly refers to the number of pixels that make it up [4].
Residual austenite and martensite, which are etched to the same colour, turned nearly the same colour (white or some other light shade) in almost all cross-sections investigated, however, ferrite grains showed differences in colour (shades of green and dark yellow).
However, this fact does not influence the results of image analysis measurements, because inspecting ferrite grains was not an aim of the inspections.
Online since: May 2011
Authors: Qing Zhu Zeng, Ru Qiang Huang, Niang Hui Li, Qian Deng, Bin Chen
Up till now, antihypertensive peptide has been developed from food raw materials by researchers in oversea, such as milk protein, soybean and soybean fermented food, grain, corn protein, collagen, fish meat, garlic, lees, etc.
Although the research on antihypertensive peptide started later in China than in other countries [2], ACEI has been separated and detected in many food raw food materials, such as bean protein (soybean protein), protein from grain and oil (peanut gliadin and corn gladin, rice bran protein, etc.), milk protein (sodium caseina, yogurt, milk, etc.) and aquatic protein (silver carp, oreochromis, acetes, etc.).
To explain the relationship between inhibitory activity and absorbent value, figures were drawn in which the number of collection tube was X-coordinate while inhibitory activity was Y-coordinate and absorbent value was second Y-coordinate.
Standard curve of Sephadex G-25 According to 1.2.5, the numbers were measured that Vt was 86.4mL, Vo was 31.4mL, and the standard curve of Sephadex G-25 (Figure.3) was drawn.
Online since: March 2015
Authors: G. Hardiman, Erni Setyowati, Sugeng Tirta Atmaja
The number of houses in Indonesia increases from year to year, even noisy urban areas such as the airport area is surrounded by a densely populated residential area [2].
Grains of sawdust is better than grains of coconut fibre.
Meanwhile, according to Callender, 1974 that the value 0 stated the absence of a sound energy absorbed and the number 1 indicates perfect absorption [14].
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