巻号一覧
12 巻, 2 号
選択された号の論文の8件中1～8を表示しています
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藤田 道也1987 年 12 巻 2 号 p. 64-71
発行日: 1987/03/01
公開日: 2011/08/16
ジャーナル フリーRecent progresses in the researches on the protein sorting in the intracellular traffic are reviewed.
In the introduction the regionality of the plasma membrane is emphasized. The present concept of intracellular traffic is historically traced in the light of Bennett's idea of “membrane flow” (1956) and the “vesicular transport” hypothesis of Palade (1953).
The organizational characteristics of Golgi apparatus (GA) is reviewed and its assumed role in the intracellular traffic is discussed. The signal sequences and their possible relations with the sorting mechanism are speculated on. The role of GA as a sorting machinery is questioned. Some of possible advances in researches in this discipline are predicted.抄録全体を表示PDF形式でダウンロード (1251K) -
小宮山 宏1987 年 12 巻 2 号 p. 72-80
発行日: 1987/03/01
公開日: 2011/03/04
ジャーナル フリーChemical vapor deposition is a method to prepare solid products in the form of a film or a particle directly from reactive vapors. Industrially, CVD is an important process for thin film preparation in IC (integrated circuit) technology and surface coating for miscelaneous purposes. The mechanism to form films and/or particles by CVD is very complex and not well known yet. Attempts to apply the CVD process to the preparation of membranes to be used for saparation are scarce. Recently proposed particle-precipitation aided CVD (PPCVD) can produce porous films and a concept for partial densification of porous films to form very thin film within the porous film has also been proposed. The preparation of inorganic thin films for separation has just started.抄録全体を表示PDF形式でダウンロード (1878K) -
機能性膜の分子設計と組織化新海 征治1987 年 12 巻 2 号 p. 81-88
発行日: 1987/03/01
公開日: 2011/03/04
ジャーナル フリーSwitch-functionalized mambranes, the permeability of which can be controlled by triggers induced by light, heat, etc., have been developed. These mambranes were designed by combination of crown ethers which act as ion carriers with functional groups which accept a signal from the outside world. In photoresponsive crown ethers, the stability constants of crown ethers can be changed by the conformational change which is induced by the trans-cis photoisomerization of the azobenzene moiety. Thus, the ion permeability of the membrane containing these photoresponsive crown ethers is directly affected by photoirradiation. In thermo-controlled membranes, the ion permeability can be controlled by crystal-liquid crystal phase transition in polymer/liquid crystal/amphiphilic crown ethers ternary composite membranes. These systems serve as well-constructed models for stimulus-responsive systems ubiquitously seen in nature.抄録全体を表示PDF形式でダウンロード (957K) -
三沢 顕次, 有沢 準二1987 年 12 巻 2 号 p. 89-94
発行日: 1987/03/01
公開日: 2011/03/04
ジャーナル フリーThe surface structure of a model membrane composed of a Millipore filter and a synthetic lipid analogue, i.e., dioleylphosphate (DOPH), immersed in KC1 solution changes when CaCl2 concentration reaches a critical value. By the stereoscopic microscope mounted a photomultiplier on the eyepiece the structure change can be measured quantitatively as an intensity change of reflected light of the membrane surface. Calcium ions decreased finally the intensity to more or less 50% as compared with the original hydrophilic state whose solution was only KC1. The structure changes were observed with various adsorbed densities of DOPH, solution temperatures and pH. The degree of structure change was dependent on these conditions.
The structure observation can also be used to detect the CaCl2 concentration in KCl solution. Since the critical CaCl2 concentration shifts widely with various densities of DOPH adsorbed in Millipore filter, the detection range was from 0.1 to 50mM CaCl2.抄録全体を表示PDF形式でダウンロード (1143K) -
1987 年 12 巻 2 号 p. 94
発行日: 1987年
公開日: 2011/03/04
ジャーナル フリーPDF形式でダウンロード (84K) -
末松 日出雄, 原田 和夫, 片岡 健1987 年 12 巻 2 号 p. 95-100
発行日: 1987/03/01
公開日: 2011/03/04
ジャーナル フリーBoth pervaporation and vapor permeation experiments using silicone rubber membrane were carried out for the ethanol-water mixtures. Preferential permeation of ethanol was obtained in the pervaporation method, but was not shown in the vapor permeation method. The total permeation rate increased with feed temperature and decreased with downstream pressure in the both methods. The total permeation rate was correlated with feed temperature by the Arrhenius' equation. Temperature dependency on selectivity was complicated in the pervaporation. It was found that the silicone rubber was swelled by ethanol solution over 80wt%.抄録全体を表示PDF形式でダウンロード (664K) -
功力 滋, 山田 英幸, 中島 貴也, 中村 良治1987 年 12 巻 2 号 p. 101-105
発行日: 1987/03/01
公開日: 2011/03/04
ジャーナル フリーBy dint of electric field given during the polymerization process, alkaline phosphatase from porcine intestine was immobilized asymmetrically in photocrosslinkable resin prepolymer membrane through entrapment. Catalytic activities of two sides of the membrane and the transport-catalysis behavior were measured.
It was found that the conversion of the substrate, present in one chamber, to the product and the transport of the latter to the other side of the membrane were more efficiently carried out when the enzyme distribution in the matrix was inclined to the side of the membrane facing to the substrate-free chamber.
The same procedure was successfully applied to coimmobilize alcohol dehydrogenase from equine liver and formaldehyde dehydrogenase from yeast in one membrane with different (complementary) distributions of the enzymes with respect to the membrane thickness.抄録全体を表示PDF形式でダウンロード (573K) -
張 鴻民, 野村 男次1987 年 12 巻 2 号 p. 106-112
発行日: 1987/03/01
公開日: 2011/03/04
ジャーナル フリーThe fouling of ion exchange membranes during the demineralization of skimmed milk was prevented by attaching acetylcellulose membrane on an ion exchange membrane in the deashing compartment. Through the use of this method, the adsorption of proteins on ion exchange membrane was prevented. As a result, during the continuous demineralization operation, the linear velocity in the deashing compartments was only little changed and the demineralization operation went satisfactorily. The pH change in the skimmed milk solution demineralized with this method was also negligible compared with that of the operation with ion exchange membrane only.
The decrease of the specific conductivities was the same whether the skimmed milk was demineralized with or without the use of acetylcellulose membrane during the first 4 hours of the demineralization operation. The permeate fluxes of water through the acetylcellulose membrane before and after the continuous demineralization operation were equal, thus showing that acetylcellulose membrane was not fouled and this method was effective in the continuous demineralization operation of proteins and other organic materials solution.抄録全体を表示PDF形式でダウンロード (817K)
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