Materials Literature
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锂 triborate (LiB3O5 ) 被高温度综合固态反应方法，然后稀土元素氧化物被做进 LiB3O5 提高它的 thermoluminescent (TL ) 性质。获得的混合物的鉴定和特征被 X 光检查衍射(XRD ) 决定， Fourier 变换红外线(FTIR ) 分析，微分热分析(DTA ) 和扫描电子显微镜学(SEM ) 。发光曲线用 thermoluminescent (TL ) 被获得读者。结果表明所有稀土元素氧化物不是为锂 triborate 的好使活跃之物，获得的混合物不能被用于 dosimetric 应用。
En este trabajo, se ha desarrollado una herramienta de fluidodinamica computacional para la simulacion de la operacion estacionaria de una pila de combustible de oxido solido (SOFC), alimentada con hidrogeno. Para ello, se ha desarrollado un completo modelo matematico que describe la naturaleza multifasica de la pila,…
In this paper an overview of novel biodegradable polymers for food packaging is presented. The aim was to present factors influencing polymer degradation and biodegradation in various environments. It was noted that biodegradable polymers are an imperfect alternative for classical polymers and their decomposition stro…
Mesogenic homologous series, 4-(4’-n-alkoxy benzoyloxy)-3,5-dichloro phenylazo-4’’- chlorobenzenes of twelve homologues has been synthesized. The first three and last three member of the series is non–mesomorphic. Mesomorphism commences from fourth homologue and ends to tenth homologue. Fourth to tenth homologues are…
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A homologous series of azoester mesogens, 4-(4’-n-alkoxy benzoyloxy)-3, 5-dichloro phenylazo-4’’-methyl benzenes of twelve homologues has been synthesized. The first three and last two member of the series is non-mesomorphic. Mesomorphism commences from fourth homologue and ends to twelfth homologue. Fifth to tenth ho…
A homologous series with -COO- and -N=N-, as central groups have been synthesized by treating p-n-alkoxy benzoyl chlorides with p-methoxy –p/-hydroxy azobenzene. All the homologues of the series are mesomorphic in nature. The nematic type mesophase commences from the very first member of the series. Polymesomorphism i…
The SRB assay was used to test in vitro cytotoxicity against four human cancer cell lines of six Indian medicinal plant species which are being used by traditional people in tribal regions for the treatment of ulcers and other diseases of patients. The ethanolic and aqueous extracts were tested against human cancer ce…
Flax fibres are an interesting alternative for the widely used glass fibres. The specific stiffness of flax fibres is higher than for glass, which indicates a possible weight benefit[1]. Flax fibres are a natural renewable material (it takes only 100 days to reach his full height). During growth and the process from s…
The recent advance in converting natural polymers such as starch, protein, and cellulose for melt processing is briefly reviewed. The technical challenges for using natural polymers for thermoplastic applications and recent innovation in extrusion plasticization of starch enabling rapid expansion of starch for high va…
A series of polyethersulfone (PES) - multi-walled carbon nanotube (MWCNT) (C/P) composite membranes with different amounts of MWCNT were prepared using the phase inversion process. The influence of addition of MWCNT on the morphologies, permeation properties and the antifouling performances of C/P composite membranes…
High strain rate properties of sheet steel largely depend on its strength level and strengthening mechanisms. The strain rate sensitivity of flow stress has a close relation with the hardness of a softer phase, which indicates superior strain rate sensitivity of multi-phase steels such as DP and TRIP steels. Simple-sh…
Based on the experiment results,a surface blasting model of rock with pre-existing defects,including voids,pores and small open joints under blasting loads is established.The defects are randomly distributed,and are empty or saturated with water.A shock equation of state(EOS),obtained from the existing test results,is…
Objective To increase the ultimate yield of periplocin in Periploca sepium adventitious root cultures by a two-stage culture based on nitrogen source. Methods Firstly, the effects of nitrogen source (NH4 + -NO3 − ) at different ratios and different total initial nitrogen amounts on the accumulation of biomass and seco…
It is well known that the flashover voltage of an insulator between two electrodes is much lower than the breakdown voltage of the same gap in the absence of insulator.The reduced value of the breakdown voltage is generally attributed to the surface charging of the insulator and resulting inter-electrode field modific…
Carbon nanotubes(CNTs) with a uniform growing and extending morphology were in situ grown on carbon fibers in carbon felt and then chemical vapor infiltration(CVI) was used to densify the felt to get a CNT-reinforced carbon/carbon(C/C) composite.The influences of CNTs on microstructures and mechanical properties of C/…
A new-style biaxial tensile specimen of solid propellant is designed,based on the cruciform specimens proposed by Kelly.By using the finite element analysis ANSYS,the stress and displacement of specimens in the test section is simulated and the optimization of the cruciform specimens is realized.The stress and displac…
The paper deals with the effect of Al content in two-phase Mg-10Li-xAl (x = 0, 1, 5) alloys on their straining behaviour before and after severe plastic deformation by high pressure torsion. Both coarse-grained and ultrafine-grained alloys were compression strained in channel-die device with simultaneous acoustic emis…
日本はレアメタル資源のほぼすべてを輸入し，ハイテク製品を大量に生産するレアメタル生産大国であると同時にレアメタルの消費大国でもある。そのため，いまや国内には膨大な量のレアメタルが製品やその廃棄物という形態で蓄積されている。これらの廃棄物は鉱物資源をほとんど持たない日本にとっては貴重な資源となり得るため，廃棄物からのレアメタルの回収技術は重要であることは論をまたない。特にレアメタルの中でも，自動車用排ガス浄化触媒や電子機器材料に欠かすことのできない白金族金属は，産出国が南アフリカとロシアに極端に偏在しており，年間産出量もレアメタルの中でも極めて少なく，供給量に制限がある。また，BRICs諸国の経済発展に伴って，白金族金属の需要はます…
Argon ion sputter etching was applied to three kinds of tool steels at a radio frequency power of 50 W to 250 W for 0.5 ks to 16.2 ks. Pillar-shaped protrusions with diameters or widths of 100 nm to 1 μm were formed on the surface of SKH51 and SKD5 steel plates, and conical protrusions of similar size were formed on t…