Tamotsu Kondo

Tokyo University of Science

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Hiroyuki Ohshima

Tokyo University of Science

Kimiko Makino

Tokyo University of Science

Nobuhiro Muramatsu

Doshisha University

Kenjiro Meguro

The University of Tokyo

Masayuki Arakawa

Microbial Chemistry Research Foundation

Masumi KOISHI

Tokyo University of Science

Michiko Tomizawa

Tokyo University of Science

Masahiko Abe

The University of Tokyo

Shiro Suzuki

Kyoto University

Motoharu Shiba

Chugai Pharma (United States)

Cooperative Institutions

Tokyo University of Science

The University of Tokyo

Keio University

Hokkaido University

Tokyo Institute of Technology

University of Tsukuba

Chiba University

Kyoto University

Tokyo Women's Medical University

Tokyo Medical and Dental University

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Electrostatic interaction between ion-penetrable multi-layered membranes

Biophysical Chemistry (1991)

Reiko Tokugawa Kimiko Makino Hiroyuki Ohshima Tamotsu Kondo

Donnan potential

Electrostatic interaction

Debye–Hückel equation

Strong electrolyte

10.1016/0301-4622(91)85031-k

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Citations (3)

Potential distribution across a membrane with surface charge layers: Effects of nonuniform charge distribution

Journal of Colloid and Interface Science (1986)

Hiroyuki Ohshima Kimiko Makino Tamotsu Kondo

Charge density

Surface charge

Surface layer

Fixed charge

10.1016/0021-9797(86)90172-4

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Citations (39)

Preparation of polyurea capsules using electrocapillary emulsification

Colloids and Surfaces B Biointerfaces (2008)

Hideki Sakai Keisuke Tanaka Hiroshi Fukushima Koji Tsuchiya Kenichi Sakai

Polyurea

10.1016/j.colsurfb.2008.07.009

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Citations (10)

A study on heat-resistance of microencapsulated glucose oxidase

Journal of Microencapsulation (1986)

Takashi Komori Nobuhiro Muramatsu Tamotsu Kondo

Polyurea microcapsules containing glucose oxidase were prepared and their thermodurability was examined. Microencapsulated glucose oxidase was found to be more stable to heat than the enzyme in free solution. This stability was enhanced with an increase in the amount of enzyme entrapped in the microcapsules.

Glucose oxidase

Polyurea

Heat stability

Heat Resistance

10.3109/02652048609031576

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Citations (8)

Stability of polymer-complexed phospholipid vesicles

Journal of Colloid and Interface Science (1988)

Koichiro Fukuda Hiroyuki Ohshima Tamotsu Kondo

Dipalmitoylphosphatidylcholine

Osmotic pressure

10.1016/0021-9797(88)90265-2

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Citations (10)

KOBUNSHI RONBUNSHU (1979)

Suzuki Shiro Tamotsu Kondo

水相中に溶解しているL-リジンと有機相中に溶解しているテレフタロイルジクロリド間の界面重縮合反応を利用しで調製した人工赤血球用ポリ (Nα, Nε-テレフタロイル-L-リジン) 膜 (PPL膜) と血清タンパク質の相互作用を種々のpH, イオン強度において研究した. 相互作用は媒質のpHに強く影響されたが, イオン強度にはほとんど影響されなかった. pH2.0においては, 大きい正電荷をもつタンパク質が負電荷をもつPPLマイクロカプセルに吸着してそのζ電位を低下させ, その結果としてマイクロカプセルの強い凝集を起こした. タンパク質の正味の正電荷が小さいpH4.0では, マイクロカプセルとの間の静電気的引力が弱まるため, タンパク質吸着は減少し, ζ電位低下も小さくなり, そのためマイクロカプセの凝集の度合も少なくなった. pH7.0ではマイクロカプセルもタンパク質も負電荷をもつので, タンパク吸着が起こらず, カプセルの凝集も観測されなかった.

10.1295/koron.36.197

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Citations (2)

Surface potential of an ion-penetrable charged membrane

Journal of Theoretical Biology (1987)

Kimiko Makino Hiroyuki Ohshima Tamotsu Kondo

10.1016/s0022-5193(87)80069-3

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Citations (13)

Interactions of gelatin—acacia microcapsules with surfactants

Colloids and Surfaces (1982)

Shiro Suzuki Tamotsu Kondo

Sodium dodecyl sulfate

Gelatin

10.1016/0166-6622(82)80005-x

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Citations (12)

Adhesion of platelets to microcapsules and the role of complement

Biochimica et Biophysica Acta (BBA) - Biomembranes (1984)

Nobuhiro Muramatsu Tamotsu Kondo

Platelet adhesion

Complement

10.1016/0005-2736(84)90276-1

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Citations (2)

Interfacial electric phenomena and Donnan potential in membranes.

MEMBRANE (1987)

Hiroyuki Ohshima Kimiko Makino Tamotsu Kondo

A model is described for the potential distribution across a charged membrane surface. This model assumes that membrane-fixed charges are distributed through a surface layer of non-zero thickness d and that electrolyte ions can penetrate the surface layer. Along the lines of this model, we discuss various interfacial electric phenomena-potential distribution across a membrane, electrophoresis, and electrostatic interaction of membranes-in comparsion with results predicted from the conventional model assuming d=0. The Donnan potential is shown to play a fundamental role in the electric behavior of membranes.

Donnan potential

10.5360/membrane.12.425

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Citations (2)