Materials Literature
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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…
炭素数 12 の長鎖アルキル基を 3 個有する芳香族ジアミンモノマーである 12G1 と脂肪族骨格のテトラカルボン酸二無水物である Cyclo-DA，もしくは芳香族骨格のテトラカルボン酸二無水物である DSDA，また，共重合用のジアミンとして DDE を用いて，溶解性に優れ，耐熱性も十分な可溶性ポリイミドを合成した．得られたポリイミドの薄膜に紫外線(λmax; 254 nm)を照射すると，水に対する接触角は照射した紫外線エネルギーに応じ，100°付近から最少 20°付近まで大きく低下し，疎水性から親水性に制御可能であることが判明した．接触角測定の結果および ATR 解析の結果より，紫外線照射によってポリイミド表面の疎水基である長鎖…
Typical blocked isocyanate systems are used to obtain the performance of two-component polyurethane system in a one-component mixture. In this study a blocked adduct was synthesized by 2,4,6-trichlorophenol (TCP) as blocking agent for polyaryl polyisocyanate (PAPI). This blocking reaction was in the presence or absenc…
Given a regular tiling of the torus, we want to depict it on a torus in space with as much conformal symmetry as possible. In particular, the conformal type of the surface should agree with that implied by the regular tiling, and symmetries not seen as Euclidean motions should be represented, whenever possible, by M¨…
The fresh dried leaves of the plant Calotropis gigantea were successively extracted with chloroform, ethyl alcohol, ethyl acetate and dichloromethane using Soxhlet extractor. Aqueous extract was prepared by cold maceration method. Well plate method was employed to determine the antibacterial activity against certain G…
S.1669-1678 (Vol.2)
Colloidal, powdered and thin film forms of MPS capped CdS quantum dots have been produced by combination of colloidal chemistry and sol-gel method. Nanoparticles were self-assembled directly on a glass substrate using spin coating method without introducing any matrix. Colloidal, powdered and thin film forms were char…
Hybrid composites of rice straw (Rs)/seaweed (Sw) and polypropylene (PP) were prepared at a fixed filler ratio of 30:70 and variable ratio of the two reinforcements, viz. 30:0, 25:5, 20:10, 10:20, 0:30 by weight. Mechanical properties of the composites such as tensile strength (TS), bending strength (BS), impact stren…