Materials Literature
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Although some immune modulatory effects of fucoidan have been elucidated, the effects of fucoidan on the apoptosis and activation of human neutrophils have not been investigated. In this study, we demonstrated that fucoidan purified from the brown seaweed Undaria pinnatifilda delays spontaneous apoptosis of human neut…
The surface segregation of alkaline metal atoms in binary alloys with various orientations of the near-surface faces is modeled by the density functional method (DFT). The influence of the dielectric properties of the contact medium on the surface and energy characteristics of the alloys with different concentrations…
Public concern to minimize post-harvest losses due to microbial spoilage has aroused interest in finding safer protectors cultures with a view to replacing synthetic chemical pesticides. An emerging alternative has been the use of natural protectors with potential fungitoxic, which must have low mammalian toxicity, le…
Electro-migration behavior in fine pitch SnBi eutectic solder bump interconnections were investigated. In the case of fine pitch SnBi eutectic solder bump (dia. 25 micro meter), maximum increasing-rate of resistance was significant less than that of larger seized bump structure (Dia. 75 micro meter).
In this study, a transparent conductive oxide (TCO)-less dye-sensitized solar cells (DSSCs)was fabricated by using titanium (Ti) electrode to replace the Fluorine-doped tin oxide (FTO) for thereduction of manufacturing cost. Ti film was formed by electron beam evaporation method and the resultsshowed the sheet resista…
An X-ray optical system is developed for a station intended for the investigation of samples with high locality under extreme conditions, i.e., high pressures and high or low temperatures. One- and two-dimensional refractive lenses and polycapillary lenses are discussed as examples of focusing systems.
s: In this study, nitrogen-doped ZnO thin films with different nitrogen content were produced by a wet chemical process. The optical properties and the structure of these ZnO films were investigated by LT-PL spectrum, Raman spectrum, SEM and XRD. XRD result showed that the cubic ZnO phase appeared in the 10% nitrogen-…
First-principles plane wave pseudopotential method based on the density functional theory is used to study of the evolution rule of the optical properties and electronic structure for ZnO tetragonal phase under different pressure. The results show that the chemical bond between zinc and oxygen is shortened with the in…
Researchers at the Massachusetts Institute of Technology in the US are developing techniques for applying strain to materials, in order to accelerate oxygen-reduction reactions for applications in solid oxide fuel cells and electrolysis cells .
Composite coatings of PTFE/PEEK (Polytetrafluoroethylene/Polyetheretherketone) were prepared by electrostatic powder spraying method. The frictional coefficient were investigated by the orthogonal experimental method. The results show that 250°C preheating temperature and 150°C working temperature are better condition…
Al-Si3N4-Al2O3composite was prepared using tabular corundum, white fused corundum,α-Al2O3fine powder and Si3N4fine powder as raw materials and phenolic resin as low temperature binder under nitrogen atmosphere at 1 300 °C for 8 h. The results show that the main reinforced phase of Al-Al2O3is Al4O4C in Al-Al2O3specimen…
The space debris of centimeter-size could pierce through the satellite shell and cause a first impact to the shell protection and a second impact to the internal structure. This paper focuses on the double hypervelocity impacts of the satellite propellant tank with baffle protection. The simplified 2D axisymmetric ana…
This study assessed the wettability of cellular surface with noncontact meniscus manipulation under a microscope. The surface of culture medium covered on cells was manipulated by air-jet and the meniscus of culture medium was generated. The movement of meniscus was monitored with a microscope. The shape of interface…
Preparation technology and measurement technique have get a great achievement in recent years,that lead to the rapid development of upconversion materials.Some of them achieve a higher fluorescence intensity,or get good hydrophily becase of the application of new type of coupling agent.This would help UCNPs closer to…
본 논문은 감도가 낮고 정밀한 족적센서의 특성에 대하여 연구한 논문이다. 이를 위하여 센서의 형상 변수 조절 범위를 낮게 선정하였다. 센서의 감도 해석으로 2차원 해석 모델을 사용할 경우 실험값과 비교한 결과 오차가 많이 나는 것을 확인하였다. 따라서 이 오차를 개선하기 위하여 3D 기반의 새로운 해석 모델을 적용시켜 재해석 하였고, 이를 실험값과 비교한 결과 오차가 개선되었음을 확인할 수 있었다.BR
The hereby paper presents comparison of numerically modelled Charpy test in LS-Dyna environment with an experiment on accredited Charpy impact test machine. The comparison was applied to dimensions of a strained sample at selected points and energy consumed for the sample fracture and strains during the test.
A crescente preocupação com a qualidade microbiológica dos alimentos tem aumentado o interesse por filmes antimicrobianos. A embalagem antimicrobiana é um tipo promissor de embalagem ativa que apresenta substância antimicrobiana incorporada ou imobilizada no material da embalagem que é capaz de eliminar ou inibir micr…
One of the major problems encountered in prediction of hereditary viscoelastic behavior of polymeric composites is the determination of heredity kernels. This issue comes down to identification of the model characterizing the viscoelastic properties of these materials. The purpose of this work is to propose a model fo…
Effect of nickel and cobalt salts on the thermal decomposition of hydrated cellulose and formation of the structure of Ni-Co-carbon fibers was studied. It is shown that the decrease in the decomposition rate of hydrated cellulose and the shift of the process to lower temperatures under the action of products formed in…
One of substantial achievements in the development of information technologies is the increase in the capacity of digital media and the decrease in their size. A paper heard at an RAS Presidium meeting reports about the distinguishing features of multilayered magnetic structures and their characteristic fundamental ef…