Materials Literature
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Polyacrylonitrile (PAN) nanofibers were prepared by electrospinning and they were modified with hydroxylamine to synthesize amidoxime polyacrylonitrile (AOPAN) chelating nanofibers, which were applied to adsorb copper and iron ions. The conversion of the nitrile group in PAN was calculated by the gravimetric method. T…
An unprecedented air-stable, nanospheric polyhydrido copper cluster, [Cu20H11(S2P(O(i)Pr)2)9] (1H), which is the first example of an elongated triangular orthobicupola array of Cu atoms having C3h symmetry, was synthesized and characterized. Its composition was primarily determined by electrospray ionization mass spec…
The crystalline morphologies of electrospun random and aligned poly(ε-caprolactone) (PCL) nanofibers, obtained by a plate collector and a two-parallel-conductive-plate collector, respectively, were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), two-dimensional wide-angle…
Peptide self-assembly is a powerful method to create functional nanoscale materials such as optoelectronically relevant organic nanostructures. The enormous potential that may come from bringing π-conjugated electronic function into biological environments is poised to impact cell and tissue engineering, biosensors, a…
Using ab-initio method and ballistic transport model, we study electron and phonon energy dispersion relations of monolayer transition-metal dichalcogenides: MoS2, MoSe2, WS2, and WSe2. Their electron and heat transports as well as their thermoelectric properties are also studied under linear response regime with diff…
Novel, porous NiCo2O4 nanotubes (NCO-NTs) are prepared by a single-spinneret electrospinning technique followed by calcination in air. The obtained NCO-NTs display a one-dimensional architecture with a porous structure and hollow interiors. The effect of precursor concentration on the morphologies of the products is i…
We report the synthesis and characterization of covalent organic frameworks (COFs) incorporating thiophene-based building blocks. We show that these are amenable to reticular synthesis, and that bent ditopic monomers, such as 2,5-thiophenediboronic acid, are defect-prone building blocks that are susceptible to synthet…
MoS2 is a two-dimensional material that is gaining prominence due to its unique electronic and chemical properties. Here, we demonstrate ligand conjugation of chemically exfoliated MoS2 using thiol chemistry. With this method, we modulate the ζ-potential and colloidal stability of MoS2 sheets through ligand designs, t…
Until now, few sp(2) carbon materials simultaneously exhibit superior performance for specific surface area (SSA) and electrical conductivity at bulk state. Thus, it is extremely important to make such materials at bulk scale with those two outstanding properties combined together. Here, we present a simple and green…
ら70年代にかけてポピュラーなマーケティング・リサーチ技法であった (Green and Carmone, 1969)。しかしその人気は過去20年間に下火になった。
A study was made in search for an effective washing method of summer time clothes labeledas "not allowed to be washed by home laundry". Cotton and rayon clothes were selected assamples. Two washing methods were examined. With A method, a towel containing ca. 210%tap water and standard detergent usage was placed on the…
条件整備について、本稿の対象とする傍系製糸 工場に当て嵌めて追究していきたい (4) 。 １．片倉製糸の北陸地方進出 (1)前史～原料繭地盤、女工地盤 昭和期に入り、片倉製糸は、傍系製糸会社と して北陸地方に片倉越後製糸株式会社(新潟県 中蒲原郡村松町) 、片倉共栄製糸株式会社(新 潟県中蒲原郡五泉町) 、それに日東紡績株式会 社金沢製糸所(石川県金沢市諸江町)を設立す る。前述の如く、1910 年代末以降、それまで の片倉製糸直営の製糸工場開設から、主に地元 有力者たちとの共同出資によって製糸会社を創 設することが多くなる。北陸地方は、この代表 例である。 片倉製糸が北陸地方に傍系製糸会社(・製糸 所)を設立する以前から、同地方…
International audience
The article considers the application of the new electrolyte based on sodium phosphate for hardening of outer cylindrical surfaces of parts from aluminum alloy.
以壳聚糖和甲基丙烯酸为原料,硝酸铈铵为引发剂,合成了不同接枝率的壳聚糖-g-聚甲基丙烯酸(CS-g-PMAA),用FTIR、1H NMR和元素分析表征了产物的结构,以柠檬酸三钠和戊二醛为交联剂制备了具有核壳结构的CS-g-PMAA载药体系。用UV/Vis检测了CS-g-PMAA粒子对模型药物的释放行为。结果表明,CS-g-PMAA接枝率为12.21%时药物释放速率最慢,其在pH=1.8介质中药物累积释放量(11 h)为44.18%,而壳聚糖粒子的累积释放量高达65.24%,即接枝改性壳聚糖粒子对药物的缓慢控制释放性能较好;CS-g-PMAA粒子的释药行为还依赖于介质的pH值和盐浓度,在低pH值...
An analysis of the characteristic times of the polystyrene segmental motion estimated on the basis of the elastic and frictional viscosity components of the polystyrenes solutions has been done. The characteristic times of the translational motion and also the diffusion coefficients of polystyrene in diluted and conce…
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Equal Channel Angular Pressing (ECAP) merupakan metode pemberian deformasi plastis secara menyeluruh pada material (severe plastic deformation) yang telah terbukti efektif dan mudah dilakukan. Material pada proses ECAP diberikan regangan plastis berupa geseran simpel dengan penekanan melalui cetakan khusus. Untuk lebi…
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International audience