巻号一覧
15 巻 (1988)
- 4 号 p. 147-
- 3 号 p. 97-
- 2 号 p. 59-
- 1 号 p. 2-
15 巻, 4 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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門脇 良策, 東原 秀和, 中西 浩一郎1988 年 15 巻 4 号 p. 147-151
発行日: 1988/10/30
公開日: 2009/09/07
ジャーナル フリーThe molar excess enthalpies for aqueous solutions of 2-butoxyethanol (BE) and 2-t-butoxyethanol (t-BE) have been measured at 298.15K over the whole concentration range with a flow microcalorimeter.
All the solutions exhibit negative enthalpies of mixing and the absolute values show |HE (t-BE)|>|HE(BE)|. The enthalpic pair interaction parameters hxx have been evaluated from the experimental data. All parameters hxx have large positive values, suggesting the strong hydrophobic interaction in these solutions. The hxx value of BE is larger than that of t-BE, which clearly indicates the orientation dependent contribution to the hydrophobic interaction.抄録全体を表示PDF形式でダウンロード (613K) -
Honoh Suzuki, Shin-ichi Ishiguro1988 年 15 巻 4 号 p. 152-157
発行日: 1988/10/30
公開日: 2009/09/07
ジャーナル フリーAn on-line controlled calorimeter has been devised and used for measuring heats of adduct formation of dimethyl sulfoxide (DMSO) with 2, 2, 2-trifluoroethanol (TFE) in 1, 2-dichloroethane (DCE) at 25°C. The observed heats were well explained in terms of the formation of two adducts, (dmso) (tfe) and (dmso) (tfe)2, and their formation constants and enthalpies were simultaneously determined. For the formation of the 1:1 adduct, the formation constant was appreciably smaller and the enthalpy was less negative in DCE than in CCl4, implying that DMSO is more strongly solvated in polar DCE than in nonpolar CCl4.抄録全体を表示PDF形式でダウンロード (840K) -
横田 洋, 熊谷 俊弥, 水田 進1988 年 15 巻 4 号 p. 158-162
発行日: 1988/10/30
公開日: 2009/09/07
ジャーナル フリーPyrolyses of copper organic acid salts, i. e., caprylate, laurate, stearate and naphthenate, were studied in the temperature range of 25∼850°C in Ar or air flow by thermogravimetry (TG)-differential thermal analysis (DTA), infrared and X-ray analyses, Decomposition reaction of the salts followed by evaporation of the organic products were found to take place in the range of 200∼350°C in Ar, where the solid product was metal copper.
In the case of an air atmosphere, decomposition reaction with combustion of the organic products and simultaneous oxidation of metal copper were found to take place.
On the final stage in air, retardation of the pyrolysis with a large tailing of weight decrease curve was found, which was considered to be caused by a formation of dense layer of copper oxide on the surface of the specimen. During the pyrolysis process solid products were metal copper, cuprous and cupric oxides. Final product heated up to 850°C was found to be cupric oxide.抄録全体を表示PDF形式でダウンロード (762K) -
柴崎 芳夫1988 年 15 巻 4 号 p. 163-165
発行日: 1988/10/30
公開日: 2009/09/07
ジャーナル フリーMelting behavior of stearic acid, which contains a polar head group (COOH) at a end of long hydrocarbon chain, was investigated by the DSC measurement. It was found that heat of fusion increased up to two times of normal value, when the sample weight was smaller than 0.01mg, and melting temperature decreased 3∼5°C in the sample having smaller than 0.2∼0.3mg. The results can be attributed to the strong interaction between the oxidized surface layer of aluminium sample pan and the carboxyl group of stearic acid.抄録全体を表示PDF形式でダウンロード (327K) -
小山 正史, 山脇 道夫1988 年 15 巻 4 号 p. 166-171
発行日: 1988/10/30
公開日: 2009/09/07
ジャーナル フリーThe pronounced vaporization behavior of congruent vaporization is suggested to be somewhat contradictory looking because of the ambiguity of its definition. New definitions are introduced and the meaning of congruent vaporization composition (C. V. C.) and congruently effusing composition (C. E. C.) are explained in terms of thermodynamics. The difference between C. V. C. and C. E. C. is shown by using the experimental results of some refractory compounds.抄録全体を表示PDF形式でダウンロード (863K) -
西成 勝好, 渡瀬 峰男1988 年 15 巻 4 号 p. 172-184
発行日: 1988/10/30
公開日: 2009/09/07
ジャーナル フリーThermal Analysis of polysaccharides and proteins which are used to improve the functional properties of food has been carried out. DSC studies on gelatinization and retrogradation of starch, gel-sol transition of thermo-reversible gels such as gelatin, agarose and carrageenan, heat-gelation of egg white and some acidic proteins, denaturation of soy-bean protein, properties of water in starch and agarose are described.抄録全体を表示PDF形式でダウンロード (1705K) -
榎 敏明, 鈴木 和也1988 年 15 巻 4 号 p. 185-193
発行日: 1988/10/30
公開日: 2009/09/07
ジャーナル フリーGraphite is a layer compound, and charge transfer complexes are formed between graphite and donor or acceptor materials. These complexes are named as graphite intercalation compounds, where the guest materials are inserted between graphite layers. The graphite intercalaction compounds are metallic with two-dimensionality. The experimental studies of low-temperature heat capacities are presented to show the electronic structures and lattice vibrations in these compounds. The electronic specific heat of alkali-metal-graphite intercalation compounds is explained in terms of the charge-transfer between graphite and alkali metal. The lattice specific heats have the Debye and Einstein terms of lattice vibrations. In the alkali-metal-hydrogen-graphite ternary compounds, which are obtained by hydrogen uptake in alkali metal-graphite intercalation compounds, electronic specific heat is reduced as the increase of hydrogen concentration. This means that hydrogen with strong electron affinity reduces the concentration of conduction electrons on graphite and alkali-metal. The lattice bivration is modified by the presence of hydrogen. The heat capacity investigation suggests two-dimensionality of the electronic structure and lattice vibrations of acceptor graphite intercalation compounds. Magnetic specific heat is discussed for transition-metal-chloride-intercalated graphite.抄録全体を表示PDF形式でダウンロード (1395K) -
香内 晃1988 年 15 巻 4 号 p. 194-199
発行日: 1988/10/30
公開日: 2009/09/07
ジャーナル フリーExperimental results of the measurement of vapour pressure of amorphous H2O(H2Oas), ice Ic and ice Ih are described. The vapour pressure of H2Oas is one or two orders of magnitude larger than those of ice Ic and ice Ih and depends greatly on the condensation temperature, Tc and the rate of condensation, R. When Tc is low and when R is small, the difference in vapour pressure between H2Oas and ice Ic is large. On the other hand, with increasing Tc and R the vapour pressure of H2Oas approaches that of ice Ic. Also the vapour pressure of ice Ic is slightly larger than that of ice Ih. We discuss the condensation and evaporation of H2Oas in space.抄録全体を表示PDF形式でダウンロード (950K)
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