bluuebunny/crossref_metadata_2025_split huggingface dataset:
Surface Chemistry of Synthetic Protein Analogues. VI. The Interaction of Urea and Salt with Non-electrolytic Polypeptides
Authors: Isemura Toshizo , Hamaguchi Kozo , Kawasato Hideyo 
Published: July 2006

Abstract
The interaction of urea and potassium chloride with non-electrolytic polypeptide monolayers was investigated. The film of polypeptide was expanded considerably in the presence of urea in the substrate. The number of molecules was, however, not changed by the interaction with urea. The molecular weights of polypeptides determined by surface pressure measurement on the substrates with or without urea were the same. Whereas the co-area of the molecule was increased by increase of urea concentration in the substrate. Urea might be bound to the peptide linkages in backbone by hydrogen bonding and the formation of aduct seems improbable.
Although potassium chloride affected the nature of electrolytic polypeptide film profoundly, it scarcely affected that of the nonelectrolytic polypeptide film. The interaction with urea was discussed in relation to the protein denaturation.
Studies on Dimethylglyoximato cobalt (III) Complexes. II Absorption Spectra of Bis-(dimethylglyoximato)- and Bis-(mono-O-methyl-dimethylglyoximato)-cobalt (III) Complexes
Authors: Nakahara Akitsugu 
Published: July 2006

Abstract
Two new compounds, [Co(NH3)2(DCH3)2]Cl and H[Co(DCH3)2(NO2)2] have been synthesized as the first examples of tervalent-cobalt complexes of dimethylglyoxime-mono-methylether. Absorption spectra of the compounds and several bis-(dimethylglyoximato)-cobalt (III)-complexes in solution have been measured.
The absorption curves of bis-(dimethylglyoximato)-cobalt (III)-complexes, generally, consist of three inflations and one maximum. The inflation in the visible region is the vestige of the first absorption band, and the two other inflations and one maximum in the ultraviolet region are the specific absorption bands which are due mainly to the dimethylglyoximate ions in coördination.
As for the first absortion bands, the results of the measurements can successfully be elucidated on the basis of the spectrochemical- and hyperchromic-series found by Tsuchida et al. For NH4[Co(DH)2(NO2)2], is also the specific band originated from the nitro-groups in coördination remarkable.
The isolated maxima on the curves of H[Co(DH)2Cl2] and H[Co(DH)2Br2] in the longer wave-length region are nothing but the first absorption bands which are shifted towards red owing to the bathochromic effect of the two halogenide ions.
In the dibromo-complex, the third absorption band is conspicuous. It has never been recognized clearly in the other complexes with dimethylglyoxime.
The absorption curves of bis-(mono-O-methyl-dimethylglyoximato)-complexes, as a whole, resemble those of corresponding dimethylglyoximato-complexes, but the bathochromic shift of the specific absorption bands from that of free ligand molecule amounts to a considerable degree in comparison with the cases of dimethylglyoximato-complexes. And this phenomenon is elucidated in connexion with the O-H-O hydrogen bonds.
From comparison of the reactions for preparing the bis-(mono-O-methyl-dimethylglyoximato)- and bis-(dimethylglyoximato)-complexes, the high stability of the latter was discussed.
Spectrochemical Study of Microscopic Crystals. VII. Absorption Spectra of Trans-dihalogeno-bis (ethylenediamine)-cobalt (III) Complexes
Authors: Yamada Shoichiro , Nakahara Akitsugu , Shimura Yoichi , Tsuchida Ryutaro 
Published: July 2006

Abstract
Dichroism of the crystals of trans-[Co(en)2Cl2]ClO4, [Co(en)2Cl2]Cl·HCl·2H2O and [Co(en)2Br2]Br·HBr·2H2O have been quantitatively determined by Tsuchida-Kobayashi’s microscopic method in the visible and ultraviolet regions.
As to the dichroism of the trans-dihalogeno-complexes, the following relations have been induced. The first band splits itself into two component absorptions. One at the longer wave-length is polarized in the X-Co-X direction, and the other at the shorter wave-length is polarized in the Co-en plane. For the third and specific bands, the X-Co-X-absorption is bathochromic to the Co-en-absorption.
On the basis of the above results, absorption spectra of several praseo-complexes in solution have been discussed.
Determination of thorium by Organic bases
Authors: Deshmukh G S , Xavier J 
Published: July 2006

Abstract
Quantitative estimation of thorium by precipitating it from aqueous thorium chloride (or nitrate) solution by o-tolidine, dianisidine, ρ-phenylenediamine, o-anisidine and o-phene-tidine has been studied. The precipitated complex is ignited to constant weight and determined gravimetrically as ThO2.
On the Electro-Osmotic Water Transport Through Cation—Exchange Resin Membranes
Authors: Oda Yoshio , Yawataya Tadashi 
Published: July 2006

Abstract
The water transference due to electroosmosis was studied for several cationexchange resin membranes of sulfonated phenol resin type, mainly in sodium chloride solution. It was shown that (1) the electroosmosis depended on the transport number of the membrane and the amount of water contained in the resin, and (2) the experimental results could be explained by introducing the idea of fixed water and mobile water in the membrane. The fixed water is supposed to be composed mainly of the hydration water attached to the polar groups of the resin.
Synthetic Studies on the Benzofuran Derivatives. Part I. A New Synthesis of Karanjin
Authors: Kawase Yoshiyuki , Matsumoto Takashi , Fukui Kenji 
Published: July 2006

Abstract
Starting from 7-hydroxy-3-methoxyflavone-8-aldehyde (II), 3-methoxyflavone-7,8-furan-α-carboxylic acid (IV) was synthesised in good yield by the method of Tanaka for benzofuran synthesis and was decarboxylated in quinoline with copper powder into karanjin (I).
Studies on A.C. Polarogroaphy. II. Fundamental Circuit and Some Experimental Results
Authors: Senda Mitsugi , Okuda Mitsuko , Tachi Isamu 
Published: July 2006

Abstract
Fundamental circuit for a.c. polarography, in which a.c. polarogram with varying as well as constant amplitude is automatically registered, was shown. And the close relation between reversibility of electrode reaction and a.c. polarographic behaviour of depolarizers was experimentally verified and another applicability of this method was pointed out.
Alkylalkoxypolysiloxanes. IV. Lower Members of Methoxy End-blocked Dimethylpolysiloxanes with One to Six Silicon Atoms
Authors: Tanaka Toshio , Okawara Rokuro 
Published: July 2006

Abstract
(1) Methoxy end-blocked dimethylpolysiloxanes have been prepared by the reaction of sodium bicarbonate with partially methanolyzed dimethyldichlorosilane.
(2) Distribution of the lower polymers was determined in regard to the composition of the partially methanolyzed dimethyldichloro-silane.
(3) Methoxy end-blocked dimethylpolysiloxanes from monomer (dimethyldimethoxysilane) to hexamer have been characterized.
Hyperconjugation. I. General Theory and Its Applications to Simple LCAO MO Calculations
Authors: I’haya Yasumasa 
Published: July 2006

Abstract
The theory of hyperconjugation has been extended and applied to computations of the electronic structures of methyl and ethylsubstituted acetylenes and benzenes using the empirical LCAO MO method not including the overlap integrals. The common empirical parameters introduced from experimental aspects were used consistently through the calculations. Charge distributions of the π-electrons, bond orders, resonance moments, relative shifts of near ultraviolet absorption spectra and oscillator strengths were calculated, and fairly satisfactory results, compared with the observed values, were obtained. Because of the lack of appropriate absorption data, the near ultraviolet absorption spectra of alkylbenzenes in normal hexane were obtained. The calculations show that when the methyl group is substituted for a hydrogen atom of the methyl group, the hyperconjugative effect is recognized as same as before.
Theoretical Analysis of Polarographic Waves. I. Reduction of Simple Metal Ions
Authors: Matsuda Hiroaki , Ayabe Yuzo 
Published: July 2006

Abstract
In the present paper, the general equation of the instantaneous diffusion current has been derived by taking into account the expansion of the mercury drop with the same accuracy as Ilkovic’s equation. Then, the general expression of the current-voltage curve for the reduction of simple metal ion has been given and its characteristics discussed upon being divided into three cases, i.e. reversible, irreversible and “quasi”-reversible. Reversible waves are given by electrode processes for which the value of ks is larger than 2×10−1 cm./sec., and on the other hand, irreversible waves are observed when the value of ks is smaller than 4×10−6cm./sec. In the irreversible case, it has been shown that the rate constant kj0 and the transfer coefficient α can be calculated from the observed values of the half-wave potential and the tangent of log-plot, respectively.
At last, the equation of the current-voltage curve due to the reduction of organic substance has been derived.
Addendum.—Recently J. Koutecky7) reported a theoretical treatment of the instantaneous and mean diffusion current for any point along the wave, in which the present diffusion problem was solved by an other method. The present work has been independently carried out.
Separation of RaD, RaE and RaF by Ion Exchange
Authors: Ishimori Tatsujiro 
Published: July 2006

Abstract
RaD, RaE and RaF may be satisfactorily separated from each other by means of an anion exchanger, Amberlite XE-98. Carriers are not necessary. The use of an anion exchanger and strong acidities of eluents helps to prevent the formation of radiocolloids. This separation technique seems to be highly suitable for the preparation of carrier-free RaE and RaF tracer. It is efficient in separation and easy to manipulate.
The Effect of Layered Water on the Color Reaction of Benzidine or Other Similar Compounds with Montmorillonite
Authors: Takahashi Hiroshi 
Published: July 2006

Abstract
The relationship between layered water and coloration of some complexes between montmorillonite and benzidine or other similar compounds has been discussed, and it is shown that they may be divided into types according to the structures of organic compounds. The shrinkage and swelling of the layer distance of the complex caused by its dehydration and hydration are observed.
The coloration of the monofunctional-complex is not so remarkable and that of the bifunctional-complex is remarkable. In the case of monofunctional-complex or the bifunctional-complex with benzidine, the amino-or hydroxyl-radical fixes on one side of the silicate layer, and then, when it is saturated with water, the water molecules get into the silicate layer. On the other hand, in the bifunctional-complex with paramine, as the amino- or hydroxyl-radical fixes on both sides of the silicate layers, the water molecules no longer get into it.
Lower Members of Diethoxycyclopolysiloxanes from Diethoxydichlorosilane
Authors: Okawara Rokuro , Hotta Saburo , Shimura Toshiro 
Published: July 2006

Abstract
(1) Diethoxydichlorosilane did not easily react with sodium bicarbonate.
(2) Diethoxycyclopolysiloxanes beginning with cyclotrimer could be obtained from the hydrolysis of diethoxydichlorosilane by using pyridine as an acid acceptor.
(3) The lower members of diethoxycyclopolysiloxanes having three to five silicon atoms have been characterized.
(4) The cyclotrimer was found to be formed only in the limited conditions of hydrolysis and it was decomsosed spontaneously in a sealed soft glass ampulla.
A Kinetic Study on the Vinylation of Alcohol
Authors: Tsuruta Teiji , Komatsubara Hiroyuki , Furukawa Junji 
Published: July 2006

Abstract
To elucidate the vinylation mechanism, a liquid phase reaction between phenylacetylene and benzyl alcohol was kinetically studied. The reaction was found to proceed along a second order mechanism between the acetylene and the alcoholate. A possible mechanism of the reaction was proposed.
Absorption Spectra of Co(III) Complexes. I. Curve Analyses of the First and Second Absorption Bands
Authors: Shimura Yoichi , Tsuchida Ryutaro 
Published: July 2006

Abstract
The measurements of the visible and ultraviolet absorption spectra of about fifteen Co(III) complex compounds have revealed that the first and second bands of these complexes are not symmetrical either on the scale of frequency or wave-length, and that these bands cannot be represented by the equation of Kuhn and Braun, nor of Lowry and Hudson.
To fit the unsymmetrical absorption bands, a new experimental absorption equation has been developed and its adequacy substantiated.
Some relationships between the first and the second bands of Co(III) complexes are also investigated.
The State of Metal Ion in Aqueous Solutions and its Surface Chemical Effects. III. Rheological Study for the Effect of Metal Ions on the Monolayer of Stearic Acid
Authors: Kimizuka Hideo 
Published: July 2006

Abstract
The effect of metallic ions on the monolayer of stearic acid was studied by the rheologi-cal method.
(1) It was shown that the development of visco-elastic property of the film is closely correlated with the formation of metal soap. Result obtained by the rheological measurement enables us to classify the metal ions into three groups; Li, Ca, Sr and Ba belong to the 1st, showing the formation of the condensed solid film and the rheological behavior of Voigt model; Th, Fe, Al, Co, Cu and Zn, the 2nd, exhibiting the formation of the expanded solid film and the rheological behavior of Maxwell model; Na, K, Rb and NH4, the 3rd, forming no solid film. These results were discussed in relation to the phenomena observed in the studies of the metal ion monolayer interaction, the adsorption of ion on the built-up film and the effect of ion on the wettability of a solid surface. These phenomena could be correlated with the formation of simple soap or complex metal ion-monolayer aggregate, the 1st and 3rd resulting in the former and the 2nd, in the latter.
(2) It was frequently observed for the interacted film with the ions of the 2nd group that the area of solidification is larger than the limiting area estimated from the surface pressure-area curve, while in the case of the film with the ions of 1st group the values of both area coincide with each other.
(3) It was shown that the monolayer of stearic acid, spread on the substrate containing ferric hydroxide sol, formed an expanded solid film.
(4) It was shown for Co and Sr ions that the strength of interacted film is a measure of film-bound ion.
Cathodo-luminescence of Samarium as Applied to the Structural Studies of Alumina. III. On Alumina derived from Boehmite and Bayerite through Thermal Decomposition
Authors: Iwase Eiichi , Nishiyama Seijiro , Isono Toshiaki 
Published: July 2006

Abstract
Investigations were carried out on cathodoluminescence spectra of samarium ions imbedded in alumina, which had been derived from bayerite and boehmite. The mode of thermal transformation of these alumina was concluded from the spectrographic results mentioned above.
A conversion to anhydrous alumina different from α-modification, presumably to β- or ζ-modification, occurred owing to the effect of the contaminating alkali minutely present, when this alumina was derived from calcination of either boehmite or bayerite, each of which had been produced in a solution of sodium aluminate.
The bohemite and the bayerite, purified thoroughly from the alkali, as well as those prepared in the absence of the alkali are readily converted to α- through γ-modification of alumina by thermal treatments.
The heating of the bayerite obtained through rapid carbonation of a solution of sodium aluminate is not, however, likely to result in a simple γ-α transformation of alumina even when the alkali has been removed by careful washing.
Cathodo-luminescence of Samarium as Applied to the Structural Studies of Alumina. V. On Alumina Derived from Hydrargillite by Thermal Treatments
Authors: Iwase Eiichi , Nishiyama Seijiro 
Published: July 2006

Abstract
Results of investigations are summarised as follows on the cathodo-luminescence spectra of samarium ions imbedded in various samples of aluminas, which were thermally derived from hydrargillite.
The transformation from γ- to α-modification of alumina takes place according as the temperature for heat treatment of the hydrargillite is elevated, at whose dried state the samarium ions have been impregnated.
After the hydrargillite was subjected to a previous heat treatment at the temperature range between 250 and 900°C, impregnated with the samarium ions and then calcined over a blast flame of coal gas mixed with air, it gives a characteristic cathodo-luminescence spectrum, which was designated by one of the present authors as the prototype III. The configuration of the alumina giving rise to luminescence bands of this prototype under the excitation by the cathode-rays is when once formed, stable and persistent for heat treatments of much elevated temperatures.
The activated alumina standardised after Brockmann can give, after being impregnated with the samarium ions, the particular cathodo-luminescence spectrum of the prototype III owing to the above-said ions. The appearance of this luminescence spectrum in its pure form is of use for choosing a material as well as for finding an activation method in the preparation of the alumina suitable for the chromatographic purpose.
The dual transformation conception postulated recently by Day on the thermal decomposition of the hydrargillite was elucidated from a structural point of view. The luminescence prototype III of samarium ions seems to be due to the special configuration of alumina, such as χ- and κ-modifications, in which the aluminium ions occupy preferably the tetrahedral rather than the octahedral interstices of oxygen network ofcubic close packing.
Photonitrosation of Cycloalkanes with Nitrosyl Chloride. I. Synthesis of Cyclohexanone Oxime
Authors: Ito Yoshikazu 
Published: July 2006

Abstract
The photonitrosation of cyclohexane with nitrosyl chloride was investigated. It was established that cyclohexanone oxime may be easily produced in good yield (72%) under suitable conditions. The dilution of nitrosyl chloride with hydrogen chloride was most effective for preventing the side reactions, and the photonitrosation of cyclohexane was carried out successsfully at a temperature of 10°C.
The color of the reaction liquid played the role of indicator for a successful photonitrosation; the side reactions seemed not to occur practically so long as the color of the reaction liquid is yellow, and hence, the addition rate of nitrosyl chloride into cyclohexane should be controlled following the color change of reaction liquid.
Dependence of the Exchange Reaction Rate in Catalyst Bed upon the Rate of Feed Gases and the Length of the Bed
Authors: Sakata Sadahiro , Morita Noriyoshi 
Published: July 2006

Abstract
(1) Exchange reaction has the prominent feature that the rate does not change with the progress of the reaction and can be determined only by the mechanism of the reaction. Therefore we can immediately detect the effect of variation in any one of the reacting conditions by the observed conversion of the isotopic exchange reaction.
(2) The relation between exchange reaction and isotopic exchange reaction is considered and an equation which gives the exchange reaction rate (R) using the integral conversion of the isotopic exchange reaction (x) is introduced.
(3) The method is applied to the exchange reaction of oxygen atoms between gaseous oxygen and water vapor catalyzed by chromic oxide, and examination is made of the effect of the variation in the rate of feed gases and in the length of the catalyst bed.
(4) At feed rates higher than 32.0 cc. (S. C.)/sec. cm2 the value R remains almost constant, but by the lowering of the feed rate more than this and by the shortening of the bed length, R is decreased. This decrease accompanied decreases both in activation energy and in frequency factor.
(5) The results are explained by the effects of mass-transfer through the gas film, of eddy or diffusional mixing of the reacting gases and of other kinds of disturbances. Masstransfer resistance of the gas film is a small fraction of the retardation. Mixing of the reacting gases may contribute a higher percent.
(6) The results are compared with the rate of exchange between hydrogen and deuterium measured by Holm and Blue.
On the Lower Boiling Product of Silicon-methylchloride Reaction
Authors: Okawara Rokuro , Sakiyama Minoru 
Published: July 2006

Abstract
(1) Tetramethylsilane, dimethylchlorosilane and methyldichlorosilane and a small amounts of trichlorosilane and hydrocarbon by-product were found in the lower boiling product (b. p. 26°–40°C) of silicon methylchloride reaction.
(2) Dimethylethoxysilane and methyldiethoxysilane besides small amounts of dimethyldiethoxysilane and triethoxysilane were found in the ethanolysis product.
(3) Owing to the contamination of the hydrocarbon by-product, dimethylchlorosilane could not be isolated by repeated distillation. To characterize this substance, it was synthesized from dimethylethoxysilane and benzoylchloride.
(4) By hydrolysis, linear copolymers M′Dn′M′ and M′DnM′ were found. Of these, copolymers M′Dn′M′ having two to eight silicon atoms and M′DM′ have been characterized.
Studies on the Cooking Mechanism of Wood. XIII. On the Phenolic Hydroxyl Group of Lignosulphonic Acid
Authors: Mikawa Hiroshi , Sato Koichiro , Takasaki Chizuko , Ebisawa Kiyo 
Published: July 2006

Abstract
The amount of the phenolic hydroxyl group of the lignin in situ was estimated to be about one per 5-6 methoxyl. Phenolic hydroxyl group of low sulphonated lignosulphonic acid is the same as that of the lignin in situ. There exist two types of phenolic hydroxyl groups (I) and (II) in lignin and lignosulphonic acid, the former being conductometrically titratable and the latter untitratable. With several lignosulphonic acid preparations, the ratios of these two types of phenolic hydroxyl groups were measured, the ratio being 1: 1 with lignin in wood, low sulphonated lignosulphonic acid, and birch α-lignosulphonic acid and about 3: 7 with α-acid of gymnosperm origin. The structures of these two types of phenolic hydroxyl groups were suggested.
Diphenylcarbazone as an Internal Indicator in Volumetric Analysis Determination of Molybdenum by Lead Nitrate
Authors: Deshmukh G S 
Published: July 2006

Abstract
The use of diphenylcarbazone as an internal indicator in the volumetric determination of molybdenum by standard lead nitrate solution is suggested. The end point is characterised by the sharp appearance of a permanent pink colour when molybdate is run into the lead solution and corresponds to the formation of Pb (MoO4). The colour change is completely reversible and errors due to overtitration are therefore eliminated.
Studies on Dimethylglyoximato-cobalt (III) Complexes. IV. Intramolecular O-H-O Hydrogen Bonds in Bis-(dimethylglyoximato)-cobalt (III)-complexes
Authors: Nakahara Akitsugu , Fujita Junnosuke , Tsuchida Ryutaro 
Published: July 2006

Abstract
Infrared absorption spectra of hydrogen dichloro-bis-(dimethylglyoximato)-cobaltate (III) prepared from both normal and deuterated dimethylglyoxime and of several other dimethylglyoximato-cobalt (III)-complexes were measured. It has been ascertained through the data of deuterated complexes that the absorption band at 1725 cm−1 of hydrogen dichloro-bis-(dimethylglyoximato)-cobaltate (III) is attributable to the O-H stretching frequency under the formation of intramolecular O-H-O hydrogen bonds.
All the bis-(dimethylglyoximato)-cobalt (III)-complexes show similar O-H stretching bands in the same region. It has been forecast that a series of examples of the very short and symmetric O-H-O hydrogen bond may be expected in the bis-(dimethylglyoximato)-cobalt (III)-complexes.