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Volume 2, Issue 2
Displaying 1-8 of 8 articles from this issue
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Kohei Hayashi1977 Volume 2 Issue 2 Pages 86-97
Published: April 01, 1977
Released on J-STAGE: October 21, 2010
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Tomio Kanno1977 Volume 2 Issue 2 Pages 98-108
Published: April 01, 1977
Released on J-STAGE: October 21, 2010
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Akira Takizawa1977 Volume 2 Issue 2 Pages 109-117
Published: April 01, 1977
Released on J-STAGE: October 21, 2010
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Hirochika Komai1977 Volume 2 Issue 2 Pages 118
Published: April 01, 1977
Released on J-STAGE: October 21, 2010
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Masayasu Tasaka1977 Volume 2 Issue 2 Pages 119-129
Published: April 01, 1977
Released on J-STAGE: October 21, 2010
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Masayuki Nakagaki, Kenji Miyata, Shuji Kitagawa, Taichiro Akiyama1977 Volume 2 Issue 2 Pages 131-137
Published: April 01, 1977
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSKonjak membrane was made from 1% aqueous solution of purified Konjak mannan and insolubilized with calcium hydroxide. The membrane potential and permeability coefficient of the Konjak membrane were measured and compared with those of lens capsule of bovine eye, a positively charged membrane, and Visking cellotube, a negatively charged membrane. On the basis of the membrane potential measurements, it has been concluded that Konjak membrane carries negative charge very slightly, the electric charge being about 1/50 of that of cellulose membrane. As the result, the permeability coefficient of Konjak membrane did not decrease even when the electrolyte concentration became fairly low. It has also been concluded that the permeability coefficient of Konjak membrane is about three times larger than that of cellulose membrane, and that no specific interaction is found between K+, Na+, Ca2+ or H+ and Konjak membrane.View full abstractDownload PDF (803K) -
Mieko Nishihara, Ken Hotta1977 Volume 2 Issue 2 Pages 139-146
Published: April 01, 1977
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSCell membrane was isolated from porcine ventricles and its Ca2+ binding and ATPase activities were investigated. The cell membrane (heart sarcolemma) exhibits Na+-K+activated ATPase and Ca2+ stimulated. Mg-ATPase activities which suggest the presence of “Ca-pump”system.
Ca2+ binding to the cell membrane was dependent on Ca2+ concentration and analysis of binding curve revealed that the existence of two kinds of binding sites (high and low affinity sites). Mg2+ increased Ca2+ binding at the high affinity site whereas Na+ decreased it. These actions of Mg2+ and Na+ may be physiologically important for the maintenance and transient change of intracellular Ca2+ concentration at rest and excitation of the membraneView full abstractDownload PDF (1392K) -
Danji Nomura, Takahisa Muramoto1977 Volume 2 Issue 2 Pages 147-151
Published: April 01, 1977
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSThis work was undertaken to obtain some fundamental data for the concentration of citrus juice by reverse osmosis using acethylcellulose membrane. Some amounts of acid in citrus juice can be permeated through the membrane. This permeation of acid may be advantageous for Japaaese juice making, because citrus juices in Japan are often too acid.
Organic acids in juice can be separated in membrane permeation to different extents under the operating condition used. The permeation is generally in the order monocarboxylic acid>dicarboxylic acid>hydroxycarboxylic acid. Organic acid retention depends upon the chemical nature of the molecule, and the order indicates that an increase in the polar functional groups in the molecule results in higher preferential sorption for water, and hence higher seperation in membrane permeation. Further, when the degree of dissociation of the acid molecule is increased, its separation also increased.View full abstractDownload PDF (581K)
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