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Volume 32, Issue 5
Displaying 1-7 of 7 articles from this issue
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Shizuyuki OHTA1983 Volume 32 Issue 5 Pages 245-257
Published: May 20, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDownload PDF (3619K) -
Chikai KIMURA, Kageaki KASHIWAYA, Koichi MURAI, Noboru SATO, Tatsuo NI ...1983 Volume 32 Issue 5 Pages 258-261
Published: May 20, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSEight kinds of condensation products were prepared by the reaction of perfluorooctanoic acid with monoethanolamine and diethanolamine in a molar ratio of 1 : 1 or 1 : 2 at room temperature or 150°C, and investigated for surface activity with respect to surface tension, wettability, oil-repellency, and emulsifying power. In general, the condensation product (1 : 1) of diethanolamine prepared at 150°C showed superior properties to those of other products. Among the three kinds of materials (benzene, kerosene, and soybean oil), kerosene was found to form generally the most stable emulsions, but soybean oil was scarcely emulsified except by the condensation product (1 : 2) of monoethanolamine.View full abstractDownload PDF (424K) -
Effects of 2-Ethylhexyl 2, 3-Dihydroxypropyl Phthalate and Its Positional Isomers as Additives for Poly (Vinyl Chloride)Kazushige MARUYAMA1983 Volume 32 Issue 5 Pages 262-265
Published: May 20, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESS2-Ethylhexyl 2, 3-dihyroxypropyl phthalate [GOP (o) ] and its isomers [isophthalate (GOP (iso) ) and terephthalate (GOP (tere) )] were prepared to examine the synergetic effects on the thermal stabilization of poly (vinylchloride) with unpoisonous synergetic metal soaps (Zn stearate/Ca stearate).
1) These phthalates slowed down the abrupt discoloration (zinc burning) of poly (vinyl chloride) films and showed marked synergetic effects. The order of masking ability was as follows :
GOP (o) >GOP (iso) ≈GOP (tere)
2) The best synergetic effect of GOP (o) in the three isomers shoud be due to the masking effect of their vicinal hydroxyl groups and -COO- segments near the hydroxyl groups.View full abstractDownload PDF (2438K) -
Shiori MIYAMOTO, Mieko TAGAWA1983 Volume 32 Issue 5 Pages 266-270
Published: May 20, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThe desorption of surfactant from carbon black suspension was studied as a function of time by using the stopped flow method. The surfactants used were sodium decyl sulfate (SDeS), sodium dodecyl sulfate (SDS), and sodium tetradecyl sulfate (STS). Carbon black suspensions containing various concentrations of surfactants were rapidly diluted with distilled water by using a mixing cell with two syringes. The electric conductivity of suspension increased with time due to the liberation of surfactant from carbon black. The changes in conductance with time were monitored by a conductmeter and an oscilloscope connected with it. The rate constants of desorption were estimated from results by applying the first-order reaction scheme. The rate constants in early stage of desorption process thus obtained were 1.8, 0.8, and 0.6s-1. for SDeS, SDS, and STS, respectively. Their half life periods were estimated to be 0.41.2s from the rate constants.View full abstractDownload PDF (772K) -
Susumu OKUMURA, Mieko IWAI, Yoshio TSUJISAKA1983 Volume 32 Issue 5 Pages 271-273
Published: May 20, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSIt was proved that the phenomenon of decrease in acid value which was once increased during incubation of castor oil with Geotrichum candidum lipase was caused by the polymerization of liberated ricinoleic acid catalyzed by the lipase. Products from ricinoleic acid by the action of Geotrichum candidum lipase were purified to homogeneity and their structures were investigated. Two of them were found to be dimer and trimer of ricinoleic acid.View full abstractDownload PDF (1986K) -
Toshikazu HIRAO, Yoshiki OHSHIRO, Ken KUROKAWA, Toshio AGAWA1983 Volume 32 Issue 5 Pages 274-276
Published: May 20, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSDiethyl alkenylphosphonates are prepared by the palladium-catalyzed reactions of the corresponding alkenyl bromides with diethyl phosphite in the presence of triethylamine. The selectivity of the phosphonation reaction and the reactivities of alkenyl bromides are discussed.View full abstractDownload PDF (435K) -
Hiromichi NII, Masayoshi HANAFUSA, Kiyoshi FURUKAWA, Mitsuo IWAKIRI, T ...1983 Volume 32 Issue 5 Pages 277-280
Published: May 20, 1983
Released on J-STAGE: November 13, 2009
JOURNAL FREE ACCESSThe fatty acids of the seed and mesocarp oils of A. lancifolia (Sieb. et Zucc.) Meisn (I), P. trilobum (Sieb. et Zucc.) Nakai (II), L. umbellata Thunb (III), L. obtusiloba Blume (IV), L. glauca (Sieb. et Zucc.) Blume (V), and M. thunbergii (Sieb. et Zucc) (VI) were analyzed by gas chromatography and mass spectrometry.
The major components of the mesocarp oils were oleic, palmitic, and linoleic acids, similar to each other.
The major components fatty acids of the seed oils were as follows :
(I), (II), and (III) -lauric, decanoic, and oleic acids.
(IV) -decanoic, lauric, and cis-4-dodecenoic acids.
(V) -cis-4-dodecenoic, lauric, and oleic acids.
The mesocarps of (II) and the seeds of (VI) contained traces of oils.View full abstractDownload PDF (451K)
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