Materials Literature
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OBJECTIVE: To investigate the eff ect of chloride concentration on the corrosion of Co-Cr alloy and pure Ti in a simulated oral environment. METHODS: The electrochemical corrosion tests of pure Ti and Co-Cr alloy were carried out in neutral artificial saliva solutions with different NaCl concentrations (0.9%, 2.0%, an…
A simple approach to the synthesis of highly dispersed nano-Mn3O by mild aqueous synthesis method at low temperatures(90 ℃) is reported. The structure, composition and morphology of the material were investigated by X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscope. The capacitan…
In this paper, we propose a enhanced anti-corrosion property of the ground system by coatingthe CNT/PVDF composite film on it. Polymer material used for preventing the corrosion of groundsystem is polyvinylidene fluoride (PVDF), and conducting filler for obtaining conductivity of the compositefilm is multi-walled carb…
As a key metabolite of glycolysis, Pyruvate affects cell growth and metabolism directly. In order to enhance the production of human-like collagen (HLC) II, pyruvate was added into fermentation broth, and response surface methodology (RSM) to optimize the addition time and dosage of pyruvate and the concentration of p…
Abstract not provided.
본 연구에서는 미세 전자 소자용 절연박막 및 차세대 플렉시블 디스플레이 기판으로서 사용이 기대되는 폴리이미드(PI)에 개환 복분해 중합(ring-opening metathesis polymerization)이 가능한 환형 말단 캡핑제(end-cappingagent)인 cis-1,2,3,6-tetrahydrophthalic anhydride(CDBA)로 사슬 말단에 가교 반응이 된 가교형 폴리이미드를 합성하였다. 말단 캡핑제의 조성비에 따른 가교형 폴리이미드 박막의 잔류응력 거동은 thin film stress analyzer(TFSA)를이용한 wafer bendin…
El cinturón hortícola de La Plata es un complejo marco de tierras con una marcada influencia urbana. El uso no regulado de agroquímicos es una de las fuentes más importantes de contaminación de aguas superficiales y subterráneas que produce cambios drásticos en la biodiversidad de las comunidades naturales. La poca pr…
Nanoscopic problems on the cathode catalyst layer in proton exchange membrane fuel cells are highly important to evaluate the performance of the devices. The aim of this work is to suggest a proper potential model for molecular dynamics simulation to deal with this problem. Four potential models TIP3P, TIP4P, TIP5P an…
Three different types of additives, thiokol, epoxidized natural rubber (ENR) and epoxidized linseed oil (ELO),were dispersed in an epoxy matrix before being used in glass fiber (GF) composites, and their effects on the mechanicaland dielectric properties of epoxy resin and glass fiber reinforced epoxy composites (GF/E…
Under pseudo high dilution conditions, cyclic oligomers of phenolphthalein poly(ether ketone ketone)s(c-PEKK-C) were synthesized from phenolphthalein and 4,4′-difluorotribenzodiketone(DFTBDK) with a cyclization ratio of 78%. MALDI-TOF MS characterization indicates that c-PEKK-C has a broad size distribution(n=2~8) wit…
A new method of estimating fission barrier heights is presented. Potential energy surface is calculated with the spherical-basis method, which is based on construction of the KTUY mass formula. Under a restriction of symmetric fission, some higher (neighboring 252Fm) and lower (neighboring 278Ds) fission barrier regio…
Fuel performance and whole core neutron transport programs are often used to analyze fuel behavior as it is depleted in a reactor. For fuel performance programs, internal models provide the local intra-pin power density, fast neutron flux, burnup, and fission rate density, which are needed for a fuel performance analy…
En este trabajo se presenta una parte de los resultados obtenidos en el marco de un proyecto de cooperación internacional en el que se estudian materiales porosos a base de cordierita obtenidos por consoli-dación térmica de suspensiones cerámicas con diferentes almidones nativos, en particular, aquéllos relacionados a…
The aromatic amino acids play a vital role in both biology and pharmacology areas. On one hand, they are the essential building blocks of protein, which can carry out many crucial bodily functions. On the other hand, these substances are recognized as chiral drugs containing a racemate and two enantiomers. In addition…
Glass ceramic has a high mechanical strength and low sintering temperature. So, it can beused as a thick film substrate or a high strength insulator. A series of glass ceramic samples based onMgO-Al2O3-SiO2-ZrO2 (MASZ) were prepared by melting at 1,600℃, roll-quenching and heat treatment atvarious temperatures from 90…
Material testing using the Kolsky bar, or split Hopkinson bar, technique has proven instrumental to conduct measurements of material behavior at strain rates in the order of 103 s-1. Test design and data reduction, however, remain empirical endeavors based on the experimentalist's experience. Issues such as wave propa…
Radioactive liquid waste from five decades of weapons production is slated for vitrification at the Hanford site. The waste will be mixed with glass forming additives and heated to a high temperature, then poured into canisters within a pour cave where the glass will cool and solidify into a stable waste form for disp…
Poly(dimethylsiloxane) (PDMS) is used to define channels for chemical and biological analysis due to its transparency and bio-compatibility. Rendering the channel surface superhydrophobic reduces the effective contact with the channel walls and lowers the needed pressure to push through fluids. This paper reports a no…
In this paper, a novel time delay reflector based on frequency selective surface (FSS) for time-domain pulse splitting is proposed. By employing dipole arrays and half-wave length resonators of the reflector, continuous incident wave with one polarization can be delayed for required time delay without affecting the in…
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