巻号一覧
53 巻, 10 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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Junzo Nakano, Yoshinobu Izuta, Tomomi Orita, Hyoe Hatakeyama, Ken Koba ...1997 年 53 巻 10 号 p. 416-422
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーPolyurethane (PU) sheets were prepared from fractionated kraft lignin (KL) samples having molecular weights (MW's) of 1420 and 860, polyethylene glycol having a MW of 400 (PEG 400) and diphenylmethane diisocyanate (MDI). KL contents in weight %, in a mixture of KL and PEG 400, were varied from 10 to 50%. The thermal and mechanical properties of PU's were studied by thermogravimetry (TG), differential scanning calorimetry (DSC) and tensile tests. The thermal decomposition temperatures slightly decreased with increasing KL contents. The glass transition temperatures (Tg's) increased, the temperature range of glass transition (ΔT) increased, and the heat capacity difference between the glass and rubbery states at Tg's (ΔCp) decreased, with increasing KL contents. Tensile properties such as strength at break (σ), elongation at break (ε), and Young's modulus (E) were measured at 25°C. The obtained results were highly dependent on the state, i.e. the glassy state and the rubbery state. The effect of molecular weight of KL on thermal degradation and tensile properties was not prominent. However, Tg's apparently increased with decreasing molecular weights of KL when the same amounts in weight % of KL were introduced into PU molecules.抄録全体を表示PDF形式でダウンロード (418K) -
仲川 勤, 荒井 統子, 大河原 義明, 永井 一清1997 年 53 巻 10 号 p. 423-430
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーPoly _??_1-trimethylsilyl-1-propyne_??_ (PMSP) membrane is the one of membranes that permeates organic compounds selectively. In addition, the flux of methanol-water mixture separation is much higher than the other polymeric membranes using for this application such as polydimethylsiloxane (PDMS).
In this study, we prepared the modified PMSP membrane in oder to enhance the hydrophobicity of PMSP, and, in turn, the affinity between chlorinated hydrocarbons and PMSP membrane. The PMSP were sorbed with fluoroalkylmethacrylates followed by irradiation of γ-ray in nitrogen atmosphere or under vacuum. The permeation properties and selectivities are determined for the mixture of chloroform-water by PV technique. In the result from PV experiment, the γ-ray irradiated PMSP membranes with fluoroalkylmethacrylate monomers showed increase in both flux and chloroform selectivity, simultaneously, at the 0.5wt% chloroform-water feed mixture. Moreover, this effect is more remarkable for the membrane which contains longer fluorinated side chain monomers.抄録全体を表示PDF形式でダウンロード (625K) -
Satoko Okubayashi, Shigeru Ariga, Hideto Shoseji, Teruo Hori1997 年 53 巻 10 号 p. 431-437
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーMeso-tetra (p-carboxyphenyl) porphine was prepared and the tin-complex was immobilized into poly (styrene) beads. The obtained polymer-supported complex showed an electron transfer ability similar to that of non-supported native complex. As applying this electron transfer function of both complexes for a photoinduced hydrogen evolution system, hydrogen was generated in the presence of electron donor and Pt catalyst. This result indicated that both polymer-supported and non-supported complexes worked as not only an electron carrier but also a photosensitizer. However, the immobilization of the complex onto the polymer lowered the electron transfer ability.抄録全体を表示PDF形式でダウンロード (523K) -
鈴木 貴, 磯貝 明, 尾鍋 史彦1997 年 53 巻 10 号 p. 438-445
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーHandsheets were prepared from wood pulp and starch pulp in flake form with various wet-end additives, and basic properties of the handsheets were evaluated in terms of addition levels of the starch pulp. The starch pulp swollen in water by heating had a reinforcing effect on interfiber bonding between wood pulps in the handsheets, thus resulting in increases in tensile strength and folding endurance of the handsheets. Especially, the addition of the swollen starch pulp brought about a remarkable increase in folding endurance. Furthermore, the addition of polyamideamine-epichlorohydrin resin (PAE), one of the wet-strength resins, together with the swollen starch pulp had a synergistic effect on the increase in folding endurance. Although wet strength of the handsheets decreased by the addition of the starch pulp, high levels of wet strength were retained by the PAE addition. On the other hand, printing opacity and sizing degrees decreased with the starch pulp addition. However, size contents in the handsheets containing starch pulp were constant irrespective of the starch pulp additions, thus indicated that the presence of the starch pulp components in the handsheets led to the decrease in sizing degrees.抄録全体を表示PDF形式でダウンロード (1466K) -
松川 三郎, 斉 勤, 堀 照夫, 文 晨, 五十嵐 泰蔵1997 年 53 巻 10 号 p. 446-452
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーCamel hairs might be hoped as very excellent fibers for garments as like cashmeres considering their fineness, softness, warmth, and lightness. But they have been used only as thick and coarse fabrics for overcoats or blankets because they hardly be spun into the thin and smooth threads.
Usually, animal hair fibers can be spun into the threads by virtue of their crimps and D. F. E of cuticles. And these two factors must be well balanced, for instance, the larger crimp force of fibers must be accompanied with the lager D. F. E. It was found that the crimp force of camel hairs was as large as wool, much larger than cashmere, notwithstanding the D. F. E was smaller than others. Therefore, it may be happened that the each camel hair curls up when the hair was drawn a comb through on the carding machine or the combing machine. Chemical analysis showed that the S-content or cystin content of the camel hairs is lower than those of the others. And the electron-micrographs showed that the bilateral structures, which are the sources of the crimp force, of the camel hairs are not so clear as those of the others.
From these data and the scanning electron micrographs observation, we supposed the presence of gelatinous adhesives on the surfaces of camel hairs covering the cuticle-edges and enlarging the crimp forces.抄録全体を表示PDF形式でダウンロード (1253K) -
青木 聡, 野村 恭稔, 水谷 裕, 橋本 修, 松岡 賢1997 年 53 巻 10 号 p. 453-460
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーThe strain Col-B isolated from environment was found to be the most effective microorganism for the biosynthesis of violaceins as valuable natural pigments in the fermentation technique using waste wool. Col-B was classified as Chromobacterium violaceum. This technology is very important and useful from the point of recycle of waste wool which was produced in large amounts in wool industry. The yields of violaceins depended on the fermentation substrate including wool powder, Vitamin L1 and other additives, and the optimized fermentation conditions and compositions of substrates were determined for mass production of the pigments. Some other microorganisms which produced other natural pigments were also isolated in this project and their applications for the biosynthesis of pigments were under investigation. Violacein has strong biological activity against Staphylococcus aureus and antioxydant activity comparable to vitamin E, but deoxyviolacein produced together with violacein does not have such activities. Large scale biosynthesis using Col-B, waste wool and Vitamin L1 can be applied for practical synthesis of violacein pigments in commercial scale.抄録全体を表示PDF形式でダウンロード (664K) -
小原 奈津子, 滝沢 智嘉1997 年 53 巻 10 号 p. 461-466
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーIn order to estimate the effect of soluble keratin protein (SKP) as a finishing agent for textiles, the influence of the additive treatment with the keratin on the dyeabilities of wool, cotton, cellulose acetate and polyester fabrics were investigated. In using the acid dye, K/S value in Kubelka-Munk equation and the rate of dye uptake of cotton fabrics were significantly increased by the treatment. From the amounts of SKP released from the fabrics through dyeing and washing processes, it was suggested that the increase of K/S value of cotton fabrics with high add-on is due to the well-dyed protein on the fabrics. In the case of the cotton fabrics with low add-on, SKP on the fabrics may promote adsorption and dispersion of the dye on the fiber surface, which result in acceleration of dispersion into the fibers at the initial stage of dyeing.抄録全体を表示PDF形式でダウンロード (1368K) -
Shigeo Nakamura, Nae Sanada1997 年 53 巻 10 号 p. 467-470
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリー6-(Alkylamino) deoxycelluloses were prepared from 6-chlorodeoxycellulose and n-alkylamines, CH3 (CH2)mNH2 (m=5, 11, 17), and their adsorption behavior of divalent heavy metal ions, Co2+, Ni2+, Cu2+ and Cd2+, was examined.
Metal ions were adsorbed on these alkylaminocelluloses in weakly acidic solution. The proportion of adsorbed metal ions increased with increasing pH of the solution and was dependent on the length of the alkyl chain in the order of n-stearylaminodeoxycellulose (m=17)> n-laurylaminodeoxycellulose (m=11)>n-hexylaminodeoxycellulose (m=5). The adsorptive activity of n-laurylaminodeoxycellulose was found to be in the order of Cu2+>Co2+, Cd2+>Ni2+. Since these adsorbents had a single coordination site in the pendant groups, the proportion of adsorption against metal ions was much lower than that of cellulose derivatives having two coordination sites in the pendant groups reported previously.抄録全体を表示PDF形式でダウンロード (235K) -
森田 みゆき, 小松 恵美子, 上舘 民夫, 渡辺 寛人1997 年 53 巻 10 号 p. 471-474
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーOrange II in the presence of nylon yarns was bleached with a mixture of horseradish peroxidase (HRP) and hydrogen peroxide (H2O2), or percarbonate. After the bleaching, the tensile properties of the nylon yarns were measured in terms of tensile strength and breaking elongation. In addition, the fracture surface of nylon yarns bleached with two bleaching systems was observed by an electron microscope. The HRP-H2O2 bleaching system gave no changes of tensile property and morphology of nylon yarns, compared with those properties of unbleached nylon yarns. In the case of percarbonate bleaching system, tensile strength and breaking elongation of the nylon yarns were markedly decreased at 70°C, and it was presumed the nylon yarns became inelastic as a result of the form observation.抄録全体を表示PDF形式でダウンロード (641K) -
内藤 勉1997 年 53 巻 10 号 p. P327-P329
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (908K) -
山内 龍男1997 年 53 巻 10 号 p. P330-P333
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (839K) -
神谷 昌博1997 年 53 巻 10 号 p. P334-P338
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (1037K) -
須藤 新一1997 年 53 巻 10 号 p. P339-P343
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (2607K) -
徳山 孝子1997 年 53 巻 10 号 p. P347-P348
発行日: 1997/10/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (842K)
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