Materials Literature
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An electrode for electric double layer capacitor (EDLC) is prepared from pitch-based activated carbon fibers (ACFs) modified by fluorination and oxyfluorination. The fluorination and oxyfluorination of pitch-based ACFs are carried out with F2:N2 ratios of 1:9, 2:8, 3:7 and F2:O2 ratios of 3:7, 5:5, 7:3, respectively.…
The blends of poly(2,6-dimethyl-1,4-phenylene ether) (PPE)/nylon 66 composites with compatibilizer were prepared by melt compounding. Halogen free flame retardant, phosphinate was incorporated into the compatibilized blends. The impact and tensile strength were deteriorated with increasing the flame retardant while th…
28-30 janvier 2015
International audience
Let G be an undirected connected graph with n vertices and m edges, n ≥ 3, and let µ1 ≥ µ2 ≥ · · · ≥ µn−1 > µn = 0 and ρ1 ≥ ρ2 ≥ · · · ≥ ρn−1 > ρn = 0 be Laplacian and normalized Laplacian eigenvalues of G, respectively. The Laplacian-energy-like (LEL) invariant of graph G is defined as... The Laplacian incidence ener…
천연 비목재 섬유로서 사용되는 Kenaf는 생장이 빨라 대량 수확이 가능하며 계획적인 재배가 용이하여 그 활용가치가 매우 높다. Kenaf는 bast와 core 부위로 구별되며 그 중 인피섬유는 목재섬유보다 폭이 좁고 강하며 섬유장이 길어 의류산업과 펄프 제지산업에 이용되고 있다. 또한 kenaf bast fiber를 복합재료로서 사용하게 되면 생분해성의 특성을 지닐 뿐만 아니라 소재의 경량화와 원가절감의 효과를 얻을 수 있다. 따라서 본 연구에서는 Kenaf의 인피섬유를 생분해성 composite의 원료로서 사용하기위해 알칼리 펄핑 및 크라프트 펄핑을 실시하였으며…
The main target of the present investigation was to study the effect of some vegetables and fruits to get rid of toxic heavy metals (Leadand Mercury)in albino rats.Fifty four healthy adult male albino rats "Sprague Dawley strain" were used and divided into 9 equal groups, one was kept as a negative control group,while…
Highly flexible transparent conducting electrodes (TCEs) are especially desired for the development of next generation flexible optoelectronic devices. However, indium tin oxide (ITO) films are currently adopted in those industries, the issues of cost and flexibility drive to develop alternatives. There are several em…
The R 2 O-CaO-SiO 2 -F system glass-ceramics were prepared through different heat treatment schedules.
In this work, we prepared carbon aerogels for hydrogen storage. Carbon aerogels (CA) were synthesized using a soft-template method. KOH was used as an activation agent. CA was activated with KOH for different temperature and KOH ratios to figure out KOH activated CA for optimum conditions for hydrogen storage capacity…
The objective of this paper is to obtain an upper bound for the second Hankel functional associated with the k th root transform ... normalized analytic function f(z) belonging to starlike and convex functions, defined on the open unit disc in the complex plane, using Toeplitz determinants.
Graphene has been emerged as a fascinating material for future nanoelectronics applications due to their extraordinary electronic properties. Since diversity in electronic structure strongly depends on their geometrical features, major concern has been focused on obtaining the number of layers- or width-controlled gra…
We described a novel technique for fabricating uniform Janus particles with anisotropic phase and different surface properties. These microsized Janus particles were synthesized by the seeded swelling and consecutive photopolymerization, in which complete compartmentalization of the particles into two distinct phases…
Noble metal nanocrystals with controlled sizes and shapes have received great interest in recent years due to the strong correlations between the size and shape of a nanocrystals and its electronic, optical, magnetic and catalytic properties. The interest has also been augmented by the technological applications of th…
Ultra-microporous carbons were prepared from starch by physical activation with oxidant at different temperatures. The morphological properties were investigated by scanning electron microscopy (SEM). The specific surface area and micropore volume were analyzed by N2/77K adsorption-desorption isotherms. A significant…
We designed and synthesized two conjugated small molecules (SM-1 and SM-2) in acceptor-donor-acceptor (A-D-A) type fashion where benzodithiophene or dithienopyrrolidine as donor and 2,4 thiazolidinedione dye as terminal acceptor respectively with new conjugated spacer. The optoelectronic properties were measured from…
Semi-IPN membranes based on sulfonated poly(arylene ether sulfone) (SPAES) were developed for high temperature fuel cells. The membranes were prepared by heating procedures using SPAES solutions containing vinyl phosphoric acid (VPA) and cross-linker. When the membrane was prepared using the optimized molar ratio of V…
본 연구의 목적은 호텔의 식음료, 조리 부문 종사원들간 조직계층에서 야기 될 수 있는 커뮤니케이션의 복잡한 관계를 이해하고, 중요사건기법(CIT)연구방법을 적용하여 세부적인 사건을 수집, 분석하여 실질적인 경영방안을 제시하는데 있다. 이러한 연구의 목적을 달성하기 위해 본 연구는 문헌연구방법과 실증적 방법으로 질적, 면접방법을 병행하였다. 즉, 국내·외 관련자료와 문헌의 이론적 고찰에 의한 종합적인 분석과 검토 후 CIT 질적 연구방법을 적용하여 설문지를 구성, 자료를 수집하고 이를 토대로 실증적 연구를 실시하였다. 인간위주의 경영을 하는 호텔기업에서 식음료·조리조…
Light-emitting electrochemical cells (LECs) are the next generation of optoelectronic devices and commonly employ ionic transition metal complexes (iTMCs) or conjugated polymers as the light-emitting material. LECs typically consist of ionic species, which are fabricated in solution and utilize air-stable electrodes,…
Block copolymer blends have the ability to build various self-assembled nanostructures. We have studied several polymer blend systems for membrane application. A thin film of block copolymer and cyclodextrin- based polymer was prepared as active layer coating for alumina membrane. This layer was prepared by layer-by-l…