巻号一覧
11 巻 (1986)
- 6 号 p. 314-
- 5 号 p. 248-
- 4 号 p. 186-
- 3 号 p. 126-
- 2 号 p. 62-
- 1 号 p. 2-
11 巻, 4 号
選択された号の論文の6件中1～6を表示しています
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松永 是1986 年 11 巻 4 号 p. 186-196
発行日: 1986/07/01
公開日: 2011/03/04
ジャーナル フリーMarked progress has been made in the development of membrane electrode in recent years. Several sensors based on inorganic, organic and bio-membrane electrode are available commercially and used in many fields. Various ion selective electrodes and biosensors have been developed for chemical analysis. In this paper, the biomimetic electrodes imitating biofunctions are described. There are three types of biomimetic membrane electrodes imitating the electron transfer system, photosynthesis system and nervous system.
The biomimetic membrane electrodes are applied to analysis, bioelectronic devices and energy conversion. The present author have developed the biomimetic electrode using copper-phthalocyanine. The sensor composed of oxygen electrode and copper-phthalocyanine membrane was applied to preliminaly screening of mutagens. The biomimetic electrode was also used for the detection of microorganisms. Cell number determination and classification were carried out with 4, 4'-bipyridine-modified graphite electrode by using cyclic voltammetry.
Thus, the biomimetic membrane electrode is promissing for detecting the materials which are not determined by ion selective electrodes and biosensors. They will also be employed for biochips and energy conversion.抄録全体を表示PDF形式でダウンロード (1320K) -
豊島 喜則, 赤堀 興造1986 年 11 巻 4 号 p. 197-208
発行日: 1986/07/01
公開日: 2011/03/04
ジャーナル フリーIt is the aim of this article to review the recent works on the electron transport on the donor side of the photochemical reaction center, P680, of photosystem II in the chloroplast thylakoid membranes. Particular attention is paid on the primary electron donor, Z, to the P680 and the water splitting complex.
Various preparations of the PS II enriched particles with O2 evolving activity are compared and the polypeptide compositions in the PS II are discussed in connection with each functional group. Characteristics of Z are examined through the experimental findings on the signal II and P680+ decay kinetics. The roles of three lumen surface polypeptides involved in the water splitting complex are discussed.抄録全体を表示PDF形式でダウンロード (1487K) -
表面電荷の層分布を考慮した理論大島 広行1986 年 11 巻 4 号 p. 209-216
発行日: 1986/07/01
公開日: 2011/03/04
ジャーナル フリーPotential distribution across a charged membrane is discussed on the basis of a model proposed by Ohshima and Ohki (Biophys. J., 47, 673 (1985)), which assumes that membrane-fixed charges are distributed through a surface layer of non-zero thickness and that electrolyte ions can penetrate into this layer. This model smoothly unites two different concepts-the surface potential and the Donnan potential. Interfacial phenomena-electrophoresis, ion binding, electrostatic interaction of membranes, and effects of non-uniform charge distribution-are considered along the lines of the above model. It is shown that the Donnan potential distribution plays an important role in these phenomena.抄録全体を表示PDF形式でダウンロード (855K) -
伊勢 典夫1986 年 11 巻 4 号 p. 217-230
発行日: 1986/07/01
公開日: 2011/03/04
ジャーナル フリーThe current status of the experimental and theoretical study on tonic solutions is reviewed. The small-angle X-ray scattering (SAXS) curves on tonic solutes such as proteins, polynucleotides, synthetic macroions, surfactant micelles and so on, show a single, broad peak, which suggests intermolecular ordering of the macroions in solutions caused by an electrostatic attractive interaction These information is confirmed by investigation on a model system, namely on polymer latex particles, which can be studied by naked eyes with an optical microscope. The micrographs provide a visible evidence for the interparticle attraction. The distortion of the ordered structure is fairly large and is a reason of the non-existence of higher order peaks in SAXS curves. The nature of the attraction, which clearly shows the invalidity of the DLVO theory on colloidal stability., is discussed in terms of a recent theory.抄録全体を表示PDF形式でダウンロード (1962K) -
大矢 晴彦, 松本 浩明, 根岸 洋一, 松本 幹治1986 年 11 巻 4 号 p. 231-238
発行日: 1986/07/01
公開日: 2011/03/04
ジャーナル フリーConcentration of aqueous ethanol solutions by pervaporation was carried out using porous polypropylene hollow-fiber of which dimensions were 0.083μm as pore diameter, 262μm as outer diameter, 20.6μm as membrane thickness l and 0.44 as porosity ε.
The aqueous solutions were fed on the outer side of the hollow-fiber membrane and the pressure of the inner side was kept lower than atmospheric pressure. Ethanol is concentrated in the permeate than the retentate.
Concentration and flux of permeate increased with the increase of feed concentration and temperature, but kept almost constant (total permeation flux : 4×10-4 mol/ (m2·s), concentration of ethanol in permeate : 30wt% at 9.5wt% 25°C, 15mmHg) with the change of feed flow rate on the outer side of the membrane. Nitrogen gas was introduced in the inner side of the membrane to reduce pressure of ethanol and water, p2E and p2W so as to increase their pressure differences over membrane (P1E-P2E), (P1W-P2W). With the increase of flow rate of nitrogen gas, permeation flux increases, but the concentration of ethanol in the permeate kept constant about 30wt% (at 9.5wt%, 25°C, 15mmHg).
Permeation rates of ethanol and water, JE and JW are expressed by the following equations.
JE=KE· (P1E-P2E) /RT JW=KW· (P1W-P2W) /RT
KE=1.31·DEM/εl KW= (0.09t+6.6) ·DWM/εl
where DEM and DWM are diffusion coefficients.
KE and KW depend on temperature of feed solution and downstream pressure.抄録全体を表示PDF形式でダウンロード (955K) -
蘇 徳成1986 年 11 巻 4 号 p. 239-243
発行日: 1986/07/01
公開日: 2011/03/04
ジャーナル フリーPDF形式でダウンロード (660K)
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