Materials Literature
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Throughout the genetic and physiological evolution of microorganisms, the microbiological sciences have been expanding the introduction of new therapeutic trials against microbial diseases. Special attention has been paid to the bacterium Helicobacter pylori , which induces gastric infections capable of causing damage…
Meshing of a straight spur gear made of a low-modular dispersion-reinforced material with a metal pinion has been simulated using a two-level calculation method for tribojonts. The values of the elastic displacements and the face contact ratio in the tooth pitch and top points were compared. A nonlinear dependence has…
A Cu2O layer was employed as a new method to achieve the superhydrophobicity on a copper surface using a simple hydrothermal method.First, a Cu2O layer with a hierarchical structure was grown on the copper surface using an oxidization step and it exhibited the hydrophilicity.The analysis results of XRD and XPS confirm…
Effects of the hardness of fine media used in shot peening on the surface modification behavior of workpiece with high hardness were investigated. Gas carburized JIS-SCM822 steels with the surface of 720 HV in Vickers hardness were shot peened by fine media with the range from 390 to 1550 HV in Vickers hardness, follo…
In this work we introduce a new logic style for p-n junctions based digital graphene circuits: the pass-XNOR logic style. The latter enables the realization of compact, energy efficient circuits that better exploit the characteristics of graphene. We first show how a single p-n junction can be conceived as a pass-XNOR…
A novel sulfur-nitrogen flame retardant containing triazine ring (SN) has been synthesized and structurally characterized by elemental analysis, FT-IR and 1 H NMR spectroscopies. Meanwhile, the effects of reaction solvent, acid-binding agent, reaction temperature and molar ratio of starting materials on the yield of S…
We propose a planar retroreflector composed of two cascaded high contrast periodic structures with slowly varying features. One of the high contrast structures focuses the light while the other reflects it as a concave mirror.
The degradation of hydrolyzed polyacrylamide in solution was studied using pyrogallol. This degradation could be induced without complicated treatments expect adding pyrogallol to hydrolyzed polyacrylamide solutions. Moreover, hydrolyzed polyacrylamide presented alkaline while progallol autoxidation could be effective…
Unmodified squalene (Sq) and epoxidised squalene (ESq), as models for natural rubber and epoxidised natural rubber, were mixed with silica in a reactor at 140 – 145ºC, which corresponds to the optimal mixing dump temperature of silica-filled natural rubber or epoxidised natural rubber compounds. The mixtures were prep…
In this study, three plants i.e. J. adhatoda, A. vulgaris and P. guajava native to Pashupati area and Jorpati of Nepal were screened to evaluate the phytochemical and antioxidant activities due to their high medicinal value. The dried leaves were extracted with three solvents: hexane, methanol and distill water. The e…
China’s system of higher education has experienced significant growth over the past two decades. Increased student enrollment, faculty hiring, newly established institutions of higher education, and transnational education initiatives are indications of the changing nature of higher education in China. Despite a perio…
In this study, the influence of the beam scanning speed to the microstructure of Ti-6Al4V parts processed by EBAM is investigated. EBAM parts were fabricated with 4 different scanning speeds, ranging from 214 mm/s to 689 mm/s, and the microstructures were studied. In addition, the volume fractions of different phases…
除他们各自的相关颜色温度上的直接影响以外，扑灭系数和黄磷的量效率也在黄磷的颜色变换元素的热负担上有巨大的影响在操作下面的变换 LEDs。因为黄磷粒子典型地在被嵌入的硅酮矩阵的低热传导性，在带的集会以内的迄今为止最高的温度在颜色变换元素以内被到达。基于一联合了我们显示出的光、热的模拟过程特别地为扑灭系数的更大的价值可能在结果上有有益的影响热负担。
cBN-particle-dispersed-aluminum (Al) matrix composites were fabricated in solid-liquid co-existent state by Spark Plasma Sintering (SPS) process from the mixture of cBN powders, Al powders and Al-5 mass% Si powders. The microstructures and thermal conductivities of the composites fabricated were examined. These compos…
A facile and environment friendly approach to synthesis of unique hierarchical BiOCl flowery microspheres(FMs)using a biodegradable surfactant polyvinyl alcohol(PVA)was reported herein for the first time.Compared to the BiOCl nanosheets synthesized in the absence of PVA,hierarchical BiOCl FMs consist of large amounts…
Porous graphene material, named as MWRGO, has been prepared by microwave-assisted reduction method. Extensive characterizations indicate that graphene oxide was effectively reduced and MWRGO has a porous and disordered stacking structure. It has a special surface area of 461.6 m 2 /g with pore size centered at 0.67 nm…
The ground states of BN molecule under different strong electric fields ranging from -0.06 a.u. to 0.06 a.u. are optimized using density functional method B3LYP at 6-311++g(d.p) level. Optimized parameters, dipole moment, charge distribution. HOMO energy, LUMO energy, energy gaps, infrared spectrum are obtained. The r…
This article studies drag reduction rule and gas restoration and retention of hydrophobic surfaces numerically when taking into consideration the surface tension effect, the microstructure here is chessboard-like and the Reynolds number varies from 3,000 to 30,000. Results show that gas restoration and retention keep…
In this article, a novel intumescent flame retardant (IFR) PNSFR containing three flame-retardant elements, phosphorus, nitrogen, and sulfur was designed and synthesized. Then a series of flame-retardant thermo- plastic polyurethanes (TPU) were prepared using the PNSFR. The effects of the flame retardant on the flam-…
Micro-voids significantly affect shock responses of brittle materials. Knowledge about the meso-scale evolution mechanism and macro-scale shock behavior will help to utilize micro-void in applications and avoid its disadvantages. A lattice-spring model, which can represent both elastic property and fracture evolution…