Online ISSN : 1884-6440
Print ISSN : 0385-1036
ISSN-L : 0385-1036
13 巻, 5 号
選択された号の論文の5件中1~5を表示しています
  • 大野 仁, 宮城 守雄, 鵜飼 哲雄
    1988 年 13 巻 5 号 p. 248-258
    発行日: 1988/09/01
    公開日: 2011/03/04
    ジャーナル フリー
    Due to a rapid technological progress in hemodialysis treatment, lifespan of uremic patient has been longer in recent years. Hemodialysis is now expected not only to save or support the life but also to promise a more comfortable life for the patient. For a more comfortable life, hemodialysis related complications become an important problems. Among complications, amyloidosis caused by β2-microglobulin is regarded as a serious problem.
    In this report, a new concept of hemodialysis membrane for β2-microglobulin removal was described in terms of membrane pore control by membrane surface-protein interaction as well as membrane manufacturing.
  • 田村 吉隆, 福渡 康夫
    1988 年 13 巻 5 号 p. 259-272
    発行日: 1988/09/01
    公開日: 2011/03/04
    ジャーナル フリー
    Theoretical approach was attempted for membrane separation of milk and milk products, which are multi-component systems, with special reference to reverse osmosis of cheese whey.
    Equations of membrane transport and concentration polarization for multi-component systems have been applicable in the case without fouling. In the application of the equations for milk products, the terms of molar concentration of the solutes, average molar mass, average solute density were required and the theoretical approach was attempted on reverse osmosis concentration of whey, UF-permeate and whole milk in the present review.
    In membrane separation of milk products, we encounter the fouling phenomena. There are at least three factors to cause fouling as follows; (1) solute component i (2) concentration of i component in the solution (c1i) (3) limiting concentration of i component (c1i lim) to cause fouling. Since all components in milk products have not been analyzed as regards to the various complex form in milk and the conditions to cause fouling have not been quantitatively analyzed, the concerned three factors have not been defined theoretically. However, the limiting concentration of solute on membrane surface (c1i lim) was determined by the experimental analysis at the moment to generate fouling applying average mass transfer coefficient.
    When the reverse osmosis cost, which varies dependent upon the volume flux level, was analyzed keeping c2, value to the constant level according to the equation for concentration polarization, the cost for 1 m3-permeate removal was expressed as a function of volume flux only. The optimum operating conditions, to minimize the operation cost, were concluded to be defined from the present theoretical approach.
  • 須郷 高信, 斎藤 恭一
    1988 年 13 巻 5 号 p. 272-282
    発行日: 1988/09/01
    公開日: 2011/03/04
    ジャーナル フリー
    Many methods of recovery of uranium from seawater have been suggested : coprecipitation, adsorption, ion flotation, solvent extraction, and others. Of these, only the adsorption method using a suitable solid adsorbent seems to be feasible with regard to economic and envirom ental impacts. Extensive investigations of adsorbents have been carried out. Among the various organic resins, chelating resins containing amidoxime groups have been selected. A novel amidoxime-group-containing adsorbent of hollow-fiber form was prepared by radiation-induced graft polymerization of acrylonitrile onto a polyethylene hollow fiber, followed by chemical conversion of the produced cyano group to an amidoxime group. The fixed-bed adsorption column, 30 cm in length and charged with the bundle of amidoxime hollow-fibers, was found to adsorb uranium from seawater at a sufficiently high rate : 0.66 mg uranium per g of adsorbent in 25 days.
  • 市川 厚
    1988 年 13 巻 5 号 p. 283-294
    発行日: 1988/09/01
    公開日: 2011/03/04
    ジャーナル フリー
    We synthesized compound 48/80, and fractionated by TLC into 14 components with various histamine-releasing activities and different Ca2+-requirements for their actions. The effect of active component was investigated on phospholipid metabolism during the postreceptorligand-binding in relation to the Ca2+-dependent histamine release from mast cells. The most active component (MW=2280, a tridecamer of N-methyl-p-methoxyphenylethylamine monomer) induced the Ca2+-dependent histamine release from mast cells, via its binding to a specific sites on the membranes. The binding reaction, a Ca2+ -independent process, induced the Ca2+-independent changes of polyphosphoinositol cv le including the hydrolysis of PIP2 and IP3 formation. On the other hand, it stimulated Ca2+-dependent releases of arachidonic acid, prostaglandins and HETEs. Kinetic analysis suggests that the binding of ligand to receptor induced a rapid accumlation of arachidonic acid into PA, PI and PC, with concomitant decrease of the arachiodonic acid from PE, following a Ca2+-dependent increase of phospholipase A2, prior to the detectable histamine release.
  • 勝 孝, 黒子 政和, 廣田 喬, 藤田 勇三郎
    1988 年 13 巻 5 号 p. 295-296
    発行日: 1988/09/01
    公開日: 2011/03/04
    ジャーナル フリー
    L-Tyrosine and L-phenylalanine were incubated with decarboxylases and the resulting amines were detected with an amine-sensitive membrane electrode. The detection limit of L-tyrosine was 20 M. This limit was superior to that of an L-tyrosine electrode constructed from L-tyrosine decarboxylase and a carbon dioxide gas-sensing electrode.
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