Materials Literature
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We report in the present paper the kinetic and mechanistic study of the oxidation of L-arabinose by pyridinium chlorochromate C 5 H 5 NHCrO 3 Cl, The reaction has been carried out in aqueous acetic acid 50 % (v/v) medium in presence of perchloric acid at constant ionic strength. The reaction has been found to be first…
The influence of the different methods of intercalation (chemical and electrochemical) and heat treatment of the natural graphite on the texture and structure derived porous carbon materials was established. It is shown that the samples obtained by chemical intercalation have developed microporous structure represente…
In FY 2012 peer reviews were conducted at three of the National Nuclear Security Administration (NNSA) Laboratories on the implementation of sustainability programs to achieve the DOE Strategic Sustainability Performance Plan goals. The three Laboratories selected include Los Alamos National Laboratory (LANL), Lawrenc…
A unified numerical model for simulating solidification transport phenomena (STP) of steel slab in electromagnetic continuous casting (EMCC) process was developed. In order to solve the multi-physics fields coupled problem conveniently, the complicated bidirectional coupled process between EM and STP was simplified as…
A Saltstone waste form was prepared in the Savannah River National Laboratory (SRNL) from a Tank 50H sample and Z-Area premix material for the fourth quarter of calendar year 2012 (4QCY12). After a 48 day cure, samples of the saltstone were collected, and the waste form was shown to meet the South Carolina Hazardous W…
The effects of copper (Cu) addition on the microstructure and mechanical properties of ZK60 alloy were investigated using an optical microscope (OM), a scanning electron microscope (SEM), and electron backscatter diffraction (EBSD) and by performing tensile tests of indirect-extruded ZK60 alloys with 0.5, 1.0, and 1.5…
VIEWPOINT OF CHEMICAL COMPOSITION. Y. Hidaka, A. Yamaguchi , N. Shirai and M. Ebihara, Department of chemistry, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji-shi, Tokyo, Japan 1920397, e-mail: National Institute of Polar Research, Tachikawa, Tokyo, Japan , Department of Polar Science, School of Multidiscip…
摘要： 制备了不同类型的巯基卟啉自组装膜，借助多种表征技术（紫外可见光谱、电化学和X射线光电子能谱）研究了不同类型卟啉自组装膜的结构特点；研究结果表明，卟啉分子中巯基取代基数目的不同（—[SH]n—，n=1,4），导致了卟啉环在自组装膜表面的构型不同，从而表现出不同巯基卟啉自组装膜性能的差异。 在此基础上，提出了不同巯基卟啉自组装膜的结构模型。
Abstract : Electromagnetic interference shielding effectiveness (EMI-SE) and tensile strength of nanocomposites containing multi-walled carbon nanotubes (MWNTs) are investigated following neutron irradiation. This nanocomposite material consists of two plies of MWNTs in an epoxy resin, and 4 plies of an E-glass substr…
多数の球形気泡を含む静止液体中における有限振幅の圧力波(音響波) の弱非線形伝播を記述する, 様々な非線形波動方程式を, 気泡流のモデル方程式系(基礎方程式系) から, 統一的に導出する方法を述べる. 分散性の非線形波動の分野でよく知られた, Korteweg-de Vries-Burgers方程式, および, 非線形Schrödinger方程式の双方を, システマティックに誘導する.
OBJECTIVE: To evaluate the ability of growth and proliferation of bladder urothelial cell and smooth muscle cell in 3-dimension (3-D) polyethylene glycol polyurethane (PEGPU) porous scaffolds. METHODS: The PEGPU scaffolds with 4 different pore size (90.8, 76.7, 40.9 and 39.6 microm) were prepared. Mouse fibroblasts, h…
![Figure][1] Norman E. Bolus, MSPH, MPH, CNMT, FSNMMI-TS I have just returned from the SNMMI 2013 mid-winter meeting in New Orleans, Louisiana, and I find myself once again amazed at the staying power of our profession. Despite many issues facing our profession, we seem always able to find
In this study, microcellular poly(lactic acid) foams with various crystallinities, cell morphologies, and densities were prepared using CO2 as the physical blowing agent. The evolution of crystallinity developments of four types of poly(lactic acid) samples during the saturation, foaming, and annealing processes was i…
A white organic light-emitting device (WOLED) with a yellow phosphorescence material, bis[2-(4-tertbutylphenyl) benzothiazolato-N,C2 '] iridium (acetylacetonate) [(t-bt)2Ir(acac)], and two blue phosphorescence materials, iridium(Ill) bis (4', 6'-difluorophenylpyridinato) tetrakis(1-pyrazolyl) borate (FIr6) and bis[(4,…
While most B2 materials are brittle, a new class of B2 (rare-earth) intermetallic compounds is observed to have large ductility. We analytically derive a necessary condition for ductility (dislocation motion) involving ⟨111⟩ versus ⟨001⟩ slip and the relative stability of various planar defects that must form. We pres…
최근 시멘트 생산 시에 발생하는 다량의 로 인한 환경문제가 심각한 실정이며, 이러한 환경문제를 해결하기 위해 고로슬래그 미분말과 같은 산업부산물을 시멘트 대체 재료로 사용한 알칼리 활성 슬래그 콘크리트에 대한 연구가 활발히 진행되고 있다. AAS 콘크리트는 상온에서 고강도 발현이 가능하지만 알칼리 반응으로 인한 빠른 응결시간과 유동성 손실로 인해 작업시간 확보에 어려움이 있는 것으로 알려져 있다. 본 연구에서는 알칼리 활성 콘크리트의 구조 부재 적용을 위한 기초 자료 확보를 위해 AAS 모르타르의 압축강도 및 유동 특성에 시멘트용 유동화제가 미치는 영향을 분석하였다…
Ferromagnetic shape memory alloys (FSMAs) are a recently-discovered member of smart materials. Smart materials undergo a substantial change in one or more properties in response to changes in external conditions such as applied loads, temperature, electrical and magnetic fields. Among these materials, Piezoelectrics,…
Introduction Vitamin-E (VE)-blended UHMWPE has been developed as a bearing-surface material due to the antioxidant ability of VE and has demonstrated a low wear rate in knee simulator [1]. Additionally, in vitro biological response testing has revealed that wear particles from VE blended UHMWPE induce the secretion of…
摘要： 在酸性介质中，钼酸根、钨酸根等同多酸根与盐酸哌唑嗪(PRH)和甲磺酸多沙唑嗪(Dox)等α1受体阻滞剂反应形成离子缔合物时，会导致体系的共振瑞利散射(RRS)显著增强并出现新的RRS光谱，最大散射峰分别位于367 nm(钼酸根体系)和290 nm(钨酸根体系)。 PRH和Dox与同多酸根的反应产物具有相似的RRS光谱特征。 其反应的适宜酸度分别为pH值2.1～2.3(钼酸根-PRH体系)和pH值3.1～3.3(钨酸根-PRH体系)。 在一定浓度范围内，不同的反应体系RRS强度增强程度与药物浓度成正比，均可用于痕量药物的测定。 反应具有很高的灵敏度，不同同多酸对PRH的检出限(3σ/s)分别为4.76 μg/L(钼酸根-PR…
Utilization of kenaf core and stalk for the production of medium density fiberboard was investigated. Control boards were produced using poplar wood fibers and compared with kenaf boards. Urea formaldehyde resin was used. Medium density fiberboards were made at two densities of 0.55 and 0.75 g/cm3. Six combinations of…