Materials Literature
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Three alternative epoxy fatty acid methyl ester plasticizers were developed and their basic performance and application performance in PVC artificial leather were investigated.In comparison with DOP,these epoxy fatty acid methyl ester plasticizers have high epoxy value and flash point which satisfies the requirement o…
Finite element model of porous titanium inserts for cementless endoprosthesis was reconstructed using X-ray tomography. The stress distribution is calculated for a model with open-cell foam and composite bone / titanium. The results explain the mechanism of the porous structure destruction and positive influence of th…
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Using the analogue theory, the analogue parameters of shaped charge jet penetrating steel plate are analyzed and the analogue rela tions of shaped charge jet penetrating steel plate are established. Then we simulated the process of Shaped Charge jet penetrating the steel Plate, using ANSYS/LS-DYNA software. The result…
The Clark amperometric oxygen sensor was applied for specific microbially induced corrosion (MIC) rate determination promoted by the bacterial strain Acidithiobacillus ferrooxidans which catalyzes the iron oxidation by the dissolved oxygen (DO) accelerating thus the corrosion process. The corrosion acceleration of UNS…
Here, we report a simple in-situ stepwise preparation of Au(core) Fe3O4 (shell) NPs through one-pot thermal decomposition by using metal acetate/acetylacetonate in a high boiling solvent. Furthermore, He La cells labeled with the surface functionalized core-shell NPs were successfully imaged with confocal laser scanni…
WS2 nanoribbons have been synthesized by chemical unzipping of WS2 nanotubes. Lithium atoms are intercalated in WS2 nanotubes by a solvothermal reaction with n-butyllithium in hexane. The lithiated WS2 nanotubes are then reacted with various solvents--water, ethanol, and long chain thiols. While the tubes break into p…
An algebraic geometry method is used to calculate the moments of the electron density of states as a function of the energy for lattices in the tight binding approximation. Interpreting the moments as the Mellin transform of the density allows writing down a formula for the density as an inverse Mellin transform. The…
We optically trap individual nanodiamonds hosting a single Nitrogen Vacancy center and demonstrate a novel route for both non-invasive 3D vectorial magnetometry and sensing of the local density of states in a liquid environment.
Despite the potential for carbon capture by concrete – estimated very roughly at 266 million tonnes worldwide each year – no-one has attempted to accurately measure the actual extent of sequestration. Measurement would be the basis for encouraging greater levels of capture and information for carbon trading and enviro…
随着氢能汽车的发展，相关的氢安全研究得到了重视。车用氢气瓶在快充过程中由于时间较短，充装速率较快，导致产生较高温升。而复合材料氢气瓶对温度有限制，要求不高于80℃。因此，针对氢气瓶的快充温升研究具有重要的实用意义。本文从试验、数值仿真、专利、标准等方面，介绍了目前氢气瓶快充过程温升的研究进展，并提出了仍待解决的问题。 With the development of the hydrogen automobile, the relevant hydrogen safety research is paid more attention. There is a high temperature rise because the ref…
The kinetic features of holes (electrons) in the Hubbard model are studied using a variational Monte Carlo method. In doped Mott insulators (U > Uco), holes are classified, in the sense of conduction, into two categories: (i) The holes appearing in doublon-holon pairs are localized, encourage singlet pair formation, a…
Zirconium alloys are widely used in the nuclear industry because of their high strength, good corrosion resistance and low neutron absorption cross-section. However, zirconium has strong affinity for hydrogen which leads to hydrogen concentration build-up over time. It is well known that the formation of hydrides will…
Senyawa epoksi merupakan produk komersial yang dapat diterapkan untuk beberapa tujuan seperti plasticizer, stabilizer, dan coating resin polimer, serta antioksidan dalam pengolahan karet alam. Penelitian ini bertujuan untuk membuat senyawa epoksi berbasis minyak sawit kasar dengan melakukan optimasi proses dengan vari…
The development of a polymer electrolyte fuel cell (PEFC) without external humidification is one of the most important issues to increase total efficiency and reduce cost. We have so far developed hybrid pattern gas flow channels consisting of interdigitated and serpentine gas flow channels for PEFCs without external…
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Механика УДК
An efficient approach for the synthesis of block copolymers of poly(acrylonitrile-co-butadiene) (NBR) and poly(styrene-co-acrylonitrile) (SAN) is described. Conjugation of preformed polymer building blocks is achieved via a hetero-Diels-Alder (HDA) mechanism employing cyclopentadiene-capped NBRs with dienophile SAN co…
针对地下连续墙施工中对泥浆指标参数的控制调整而使现场泥浆达到较优性能的配比的复杂问题，采用赋值参数应用到泥浆比重的计算公式，得到关于加水稀释比重的经验公式。同时，使用马鞍山公园站地下连续墙现场泥浆做试验，以验证此经验公式的可行性及添加羧甲基纤维素(CMC)对粘度影响的一般规律。从而引导泥浆以达到较优性能，对类似工程实践具有一定的借鉴和指导意义。 Based on the construction of the complicated problem of underground continuous wall of mud parameter, which controlled and adjusted to achieve su…
Micro-sized hair-like structures, such as cilia, are abundant in nature and have various functionalities. Many efforts have been made to mimic the fluid pumping function of cilia, but most of the fabrication processes for these "artificial cilia" are tedious and expensive, hindering their practical application. In thi…