Materials Literature
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The results of an investigation into the possibility of applying a device based on a 10 B neutron counter (CHM-14) with a polyethylene moderator as the dosimeter of neutron ambient dose equivalent H *(10) in radiation fields of nuclear physics installations at the Joint Institute for Nuclear Research (JINR) are presen…
製紙原料中の微細繊維や填料として微粒な炭酸カルシウムの配合割合の増加，抄紙マシンの高速化等により歩留りを維持，向上するには高分子量を有する歩留向上剤が必要とされる。そのため，歩留向上剤として汎用されてきたポリアクリルアミド（PAM）系ポリマーの更なる高分子量化を図ることを主眼としたポリマーの設計開発がなされてきた。一方，より高品質な紙を製造するという観点から歩留向上剤にも紙質を改善する機能が要望される。そのため歩留の向上や生産性の向上と共に紙品質の向上も図れる薬剤が必要とされる。紙品質の向上には高い地合い性を付与する必要があると考える。しかし，直鎖型高分子量PAMは不均一な過大なフロックを形成したり，フロックが局在化したりするため…
天然ゴム(NR)の延伸結晶化は NR ブレンドの力学物性に重要な役割を果たしていると考えられる．本研究では，組成および架橋密度の異なる NR/スチレンブタジエンゴム(SBR)ブレンドの引裂エネルギー(G)への NR の延伸結晶化の効果を検討した．SBR もしくは NR/SBR(1/9)ブレンドの G はシフトファクターを用いることによって 1 本のマスターカーブに換算されたが，NR の G は重ね合わせることができなかった．一方，NR/SBR(3/7)ブレンドの G は不連続なマスターカーブになったが，NR/SBR ブレンドの架橋密度を約 3 倍高くすることによって重ね合わせることができた．NR/SBR ブレンドは NR の組成を…
The anthracycline antibiotic doxorubicin (DOX) is one of the most effective anti-tumour agents used to treat human malignancies. Long-term treatment with DOX is limited by its cardiotoxicity. The purpose of the present study was to evaluate the cardiotoxic effect of DOX using nanoscale. Twelve adult male rats were div…
Both magnetization and coercivity should be controlled on BaFe12O19 for its usage in magnetic recording. Preparation of BaFe12O19 was studied in citrate route by changing the kinds of iron source. Stoichiometric mixtures of iron compounds with Ba(NO3)2 were dissolved in distilled water. They were mixed with citric aci…
Bacterial density was observed in liver, spleen, kidneys, muscles, and gills of freshwater fish Channa punctatus under stress from heavy metals including cadmium (Cd), chromium (Cr) (hexavalent) and lead (Pb) individually. Maximum density of aerobic heterotrophic bacteria was observed as colony forming units per gram…
The way that the difference in the refractive indices of lithium niobate crystals changes upon the rapid heating of a sample with electroconductive masks deposited on its surface has been studied. It is shown that the phenomena observed are fully described by the pyroelectric effect in the presence of temperature grad…
The electrical resistivity and Hall factor in n-CdAs2, p-ZnAs2, and n-Cd x Zn1 − x As2 were measured at hydrostatic pressures up to 9 GPa and quasi-hydrostatic pressures up to 50 GPa at room temperature. For n-CdAs2, a phase transition was discovered at p = 5.5 GPa; for p-ZnAs2, two phase transitions were discovered:…
Changes in the layer thickness and roughness of as-prepared methylcellulose (MC) films with thermal cycling were studied using the X-ray reflectivity technique. It was found that thermal stress induced by rapid and slow thermal cycling brings no apparent changes in the surface and interface roughness after thermal cyc…
The crystal structure of N,N-dipyridyl-N, N-ethylenedi(5-bromo-3-formyl-2-hydroxybenzylamine) was determined by single-crystal X-ray diffraction. The compound crystallizes in a monoclinic system and was characterized thus: C2/c, a = 17.6158( Z = 4, V = 2807.3(4) 3 . The crystal structure was solved by direct methods a…
As for the Al–Si hyper-eutectic alloys with phosphorous addition, the primary Si size is dependent on the holding temperature relative to the “Critical Temperature Line for Grain Refinement”, which was discovered by the authors. If the holding temperature falls under this line, the size will be coarsened. Cooling rate…
Several heterogeneous catalysts were prepared starting from Mg-Al and Zn-Al hydrotalcites (HTs) and evaluated for oxidation, ozonation, dehydrogenation and reforming of hydrocarbons, and the CO shift reaction. All catalysts exhibited unique and excellent activities in these reactions. Fe/Mg/Al oxide catalysts prepared…
Gold (Au) nanoflowers have been fabricated using anodic aluminum oxide (AAO) templates assisted electrochemical deposition on the Au film, in which the templates were coated by poly (dimethyl siloxane) (PDMS). PDMS is a viscous, soft material which helps the AAO template to stick to the Au film and assists in the form…
Indium-sulfide-oxide thin films have been successfully deposited on indium-tin-oxide-coated glass from an aqueous solution containing Na2S2O3 and In2(SO4)3 by electrochemical deposition using a periodic 2-step-pulse voltage. The films have been annealed in nitrogen atmosphere for an hour at different temperatures; nam…
Energy production from fossil fuels, mainly natural gas and coal, contributes significantly to global warming through large-scale greenhouse gas emissions, mainly of hundreds of billions of tonnes of carbon in the form of carbon dioxide. At least for the next few decades, one of the realistic options for reducing carb…
The impact analysis was done to precise bolt FE model by explicit software LS-DYNA. The bolt simple model was created using anisotropic material and plastic strain damage rule based on anterior calculated results. With same boundary conditions, the stress and strain results of precise and simple model were compared an…
Well-crystallised vertically aligned ZnO nanowires have been synthesised on silicon substrate via simple thermal evaporation process without the use of metal catalysis or additives at 750°C by using metallic zinc powder and oxygen gas as source materials for zinc and oxygen, respectively. The X-ray diffraction (XRD) p…
Wavelength tunable photoluminescence (PL) of Si-rich silicon nitride (SRSN) film with buried Si nanocrystals (Si-ncs) grown by plasma enhanced chemical vapor deposition (PECVD) under SiH4 and NH3 environment is investigated.Intense broadband visible emissions tunable from blue to red can be obtained from the as-deposi…
The application of high temperature fuel cells in stationary power generation seems to be one of the possible solutions to the problem related to the environment preservation and to the growing interest for distributed electric power generation. Great expectations have been placed on both simple and hybrid fuel cell p…
“Metal-oxide-semiconductor (MOS) capacitors with tandem aluminum oxides” ( Al 2 O 3 ) prepared by oxidation of aluminum in HNO 3 with dc superimposed with ac anodization (DAC-ANO) compensation at room temperature was demonstrated. The technique of DAC-ANO was applied to repair the traps in the dielectrics. The electri…