巻号一覧
47 巻, 3 号
選択された号の論文の14件中1～14を表示しています
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M. Takai, F. Nonomura, T. Inukai, M. Fujiwara, J. Hayashi1991 年 47 巻 3 号 p. 119-129
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーThe laminated or composite bacterial cellulose (BC) membrane is very useful not only for ultrafiltration but also for evapomeation of membrane separation techniques. BC membranes laminated with β-chitin or deacetylated chitin sulfonate (S-DAC) show high solute rejection, 85% rejection in the former, 90% rejection in the latter for PEG 50000 as compared with 30% rejection of normal BC membrane. They are twice level of the BC derivatives of acetate or nitrate. In particular the membrane thinly laminated with S-DAC is very effective for the separation of solute more than 50000 in molecular weight, and shows relatively high flux rate of 10-12L/m2h, and great strength. Water-soluble polymers such as hyroxyethyl cellulose (HEC), hydroxypropyl (HPC), carboxymethyl cellulose (CMC), methyl cellulose (MC) and carboxymethyl chitin (CM-chitin), have been incorporated into BC during incubation as high as 30wt%. The water-soluble polymers influence more or less their preferential orientation. CMC and CM-chitin additives provide the highest transparency index of 2 or 3 times as compared with normal BC. The composite membranes with HEC and CM-chitin are good UF membrane which show very sharp slope and the highest rejection of more than 95% for PEG 50000 and relatively high flux late. The laminated membrane with β-chitin or composite membrane with HEC is also very effective for the separation of aqueous ethanol solution by evapomeation. Water molecules are selectively dissolved into the chitin or HEC layer and then predominantly diffused through BC layer.抄録全体を表示PDF形式でダウンロード (1204K) -
奈倉 正宣, 宮原 敏, 大越 豊, 石川 博1991 年 47 巻 3 号 p. 130-135
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーThe processes of the formation of β-sheet crystallites in poly (γ-methyl L-glutamate) were investigated by infrared spectroscopy and X-ray diffraction. By immersion into a formic acid-water (50/50v/v) mixture, the β-sheet crystallites did not form at room temperature, while the size of α-helix crystallites increased and the α-helices became to be packed more tightly each other in the crystallites. At higher temperatures, the β-sheet crystallites grew from the random-coil conformation even immediately after the immersion. At the same time, the α-helices existing at the surface of the α-helix crystallites were transformed to the random-coil conformation and then turned to the β-sheet crystallites. By drawing of untreated specimen, the β-sheet crystallites grew slightly from the random-coil conformation. When the specimen was drawn after immersing into a formic acid-water mixture for 2h at 70°C and 80°C, the β-sheet crystallites grew from the remaining random-coil conformation and the α-helices existing at the surface of α-helix crystallites were transformed to the random-coil conformation and then the β-sheet crystallites formed from the random-coil conformation.抄録全体を表示PDF形式でダウンロード (433K) -
後藤 徳樹, 脇田 登美司, 具 剛1991 年 47 巻 3 号 p. 136-140
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーThe polyester fabrics or films treated with oxygen low-temperature plasma increased the wettability due to the incorporation of much amount of oxygen atoms on the surface. The durability of hydrophilic property at room temperature was improved with the rise in the sample temperature during the plasma treatment, especially at above the glass transition temperature. The durability of hydrophilic property against wet or dry heat treatment was sufficient below 80°C, and decreased gradually at higher temperatures.抄録全体を表示PDF形式でダウンロード (364K) -
正井 敬人, 清造 剛1991 年 47 巻 3 号 p. 141-147
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーPolypropylenes with different molecular weights containg organosulfur compounds as thermal decomposition accelerators were melt-spun into fibers. The density and the birefringence of as-spun fibers decreased and the tensile strength of drawn fibers increased with the decrease in intrinsic viscosity. The plot of intrinsic viscosity versus each of these properties showed a single line irrespective of the additives and the spinning temperature. The intrinsic viscosity, the density, and the birefringence of as-spun fibers decreased and the tensile strength and the elongation of drawn fibers increased with increasing additive concentration. Comparing at a fixed intrinsic viscosity, as-spun fibers from a higher molecular-weight polymer had lower density and lower birefringence, and their drawn fibers showed higher tensile strength and higher elongation than those from a lower molecular-weight polymer. Fibers containing additives used in this study showed an excellent ultraviolet stability.抄録全体を表示PDF形式でダウンロード (444K) -
田畑 功, 堀 照夫, 中村 良治1991 年 47 巻 3 号 p. 148-154
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーRegarding the electron transfer function of the intercuticular cement material (δ) and of the kerateine component (RK) of wool in the presence of cupric ion, cyclic voltammetry of aq. mixed solutions of methylviologen (MV) and various amino acid-cupric complexes were carried out on a bare carbon electrode. Cyclic voltammetry of MV aq. solution was also done using electrodes modified with δ-Cu2+ and RK-Cu2+. The occurrence of electron exchange between MV_??_ and cupric complex of basic amino acid (His and Arg) and of δ or RK was evidenced. These suggest that the electron transfer function of δ and RK results from the shift of the standard redox potential of Cu2+/Cu+ to more negative values by forming cupric complex with His and Arg residues in polypeptides of δ and that the cysteine residue in RK could also function as an electron carrier.抄録全体を表示PDF形式でダウンロード (469K) -
田川 由利香, 上田 充夫, 平嶋 恒亮, 政木 康生1991 年 47 巻 3 号 p. 155-160
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーThe methods to analyze the color of dyed or printed materials utilizing computer image analyzing systems were studied. Spectral reflectance curves and tristimulus values of the samples could be obtained as two dimensional data from the image of the sample. The reflection image of the sample was filtered and spectrally divided with 20 types of interference monochromatic glass filters (20 nm intervals, 400 - 780 nm) to 20 divisions of monochromatic images. Each monochromatic image was recorded by video camera, digitalized, and stored on the computer memories. From the images on the memories, spectral reflectance curve and CIE-XYZ tristimulus values at any point of the sample could be obtained with high accuracy. The technique could be applied to the quantitative analysis of the colorant absorbed on a solid substrate. The image of the sample formed by monochromatic reflection was converted to that formed by K/S values by computer calculation using the Kubelka-Munk equation. Since an intensity at any point in the K/S image could be related to the density of colorant at the corresponding point of the sample, the integration of the intensities of K/S image over enfire surface represents the total amount of colorant on the sample. Some examples of the method were demonstrated.抄録全体を表示PDF形式でダウンロード (473K) -
大野 亮1991 年 47 巻 3 号 p. 161-167
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーThe magnetic three-dimensional digitizer was applied to the measurement of human body. The principle of position determination is presented. The precision of the measurement depends mainly on the distance between the magnetic source and the sensor, becoming exponentially poorer with increase in the distance. Based on the three dimensional data of a plaster dummy, a wire model of the dummy was displayed by computer graphics. As an application of the measurement, circumferential length of the trunk was calculated, which agreed well with that determined by measurement with tape. The error of the calculated length was estimated to be 0.93%, which included the apparatus error and the approximation error. The best use of characteristic features of the magnetic three-dimensional digitizer is the motion analysis of a human body or input of apparel design on a dummy.抄録全体を表示PDF形式でダウンロード (1207K) -
筏 義人1991 年 47 巻 3 号 p. P120-P125
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (3942K) -
上田 智子, 石原 一彦, 中林 宣男1991 年 47 巻 3 号 p. P126-P132
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1565K) -
ハイブリッド型人工肝臓戸辺 成四郎, 小林 一清, 赤池 敏宏1991 年 47 巻 3 号 p. P133-P141
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (2785K) -
力学的知能材料としての生体と人工材料の適合高久田 和夫1991 年 47 巻 3 号 p. P142-P145
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1645K) -
木船 紘爾1991 年 47 巻 3 号 p. P146-P150
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (2317K) -
谷 嘉明1991 年 47 巻 3 号 p. P151-P155
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1079K) -
玄 丞烋1991 年 47 巻 3 号 p. P156-P162
発行日: 1991/03/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1604K)
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