bluuebunny/crossref_metadata_2025_split huggingface dataset:
lonization Potentials of Some Organic Molecules. IV. Troponoid Compounds
Authors: Higasi Keniti , Nozoe Tetsuo , Omura Itiro 
Published: July 2006

Abstract
First ionization potentials are obtained for the four substances: tropolone (a) 9.86, (b) 9.83; tropone (a) 9.68, (b) 9.69; 2-aminotropone (a) 9.43, (b) 9.50; cyclohexanone (a) 9.91, (b) 9.83 (units being eV.). Classification symbols, (a) and (b), denote that the measurement was made either by the method of critical slope or by the linear extrpolation method. These results are consistent with the conclusions from other physical data under certain conditions.
Dielectric Investigation on Coals. II. Mixture of Coal Powder and Paraffin Wax
Authors: Higasi Keniti , Miyasita Isao , Ozawa Yasutomo 
Published: July 2006

Abstract
A new method using powdered coal and paraffin wax was proposed for measuring the dielectric constant of coal concerned. In order to check the validity of this method, experiments were conducted on five coal specimens for which direct determination of dielectric constant had been made by the writers. Special attention was paid to the choice of a mixture formula and also to the influence of the electric conductivity upon the dielectric constant. It was concluded then that the present method could reproduce the dielectric constant of the coal with the fair precision of ± 10%.
The microwave measurement on one specimen reveals that all the dipoles in coal are completely inhibited from rotation at this frequency.
Dielectric Investigation on Coals. IV. Notes on Dipole Moment
Authors: Higasi Keniti , Higasi Yosie , Miyasita Isao 
Published: July 2006

Abstract
If coal be regarded as a supercooled liquid, a basis will be provided for determining the dipole moment of coals. Further uncertainty as to choosing a proper equation for liquids is dispelled by the fact that the Onsager equation gives for coal almost the same magnitude of dipole moment as obtained by the Debye equation.
After discussion focussed on the values of the ordinary and optical dielectric constants, dipole moments are evaluated for 19 coal specimens including four samples of foreign origin.
Brown coals are found to have a moment near to that of one O–H group. The polarity of bituminous coal is in general too small to be distinguishable from zero. These results are consistent with the observations on the frequency dependence of dielectric constant and loss factor of these coals.
Cyclopolysiloxanes from Cohydrolysis of Dimethyldichlorosilane with Methyldichlorosilane and Ethyldichlorosilane
Authors: Okawara Rokuro , Takahashi Ukiko , Sakiyama Minoru 
Published: July 2006

Abstract
1) Cyclotetrasiloxanes having D′ and D, and D* and D units have been prepared and characterized.
2) Methylhydrocyclopolysiloxanes D′n (n=4–7) and ethylhydrocyclopolysiloxanes D*n (n=3–6) have also been prepared and characterized. The erroneous assignment given to the latter compounds have been corrected.
3) Triethylcyclotrisiloxane D*n, the first member of D*3 was found to be an unstable compound.
Separation of Fission Products by Liquid-Liquid Extraction with Cupferron-Chloroform
Authors: Kiba Toshiyasu , Kanetani Mitsue 
Published: July 2006

Abstract
In order to separate rapidly the radioactive strontium and cesium from the solution containing gross fission products and other non-radioactive metallic ions, cupferron-chloroform extraction was attempted. By changing the acidity of the aqueous solution from 1n hydrochloric acid to pH 4, and by performing extractions in each stage, the strontium and the cesium could remain in the aqueous phase, while the other could be removed into the organic phase. The radioactive strontium may be extracted in the organic phase by the following extraction with TTA-hexone at pH 8.
Electron Diffraction Investigation on Tropone
Authors: Kimura Katsumi , Suzuki Satoshi , Kimura Masao , Kubo Masaji 
Published: July 2006

Abstract
The electron diffraction photographs of tropone in the gaseous state were taken with an τ2-sector. The data of the scattered intensity was analyzed by means of the radial distribution method as well as by the correlation method. The investigation of the molecule has led to the conclusion that the molecule assumes an essentially co- planar structure having a regular heptagon ring. The most probable values for the bond distances are: C—C=1.405±0.005Å, C=O=1.26±0.02Å and C···H=1.09±0.03Å.
Mutual Solubilities of Some Hydrocarbon Oils and Liquid Ammonia. I. Solubility Data
Authors: Ishida Kiyoharu 
Published: July 2006

Abstract
In order to obtain the quantitative knowledge on the solubility relations for liquid ammonia systems, mutual solubilities of aromatic hydrocarbons and liquid ammonia were determined at the several temperatures near the critical solution temperature, and data for other hydrocarbons were mainly obtained at 20° and 0°C. These results were presented in tables and a figure.
The Infrared Spectra of Ethoxy- and Methylethoxy-polysiloxanes
Authors: Okawara Rokuro 
Published: July 2006

Abstract
1) The infrared spectra of the lower members of ethoxy-, and mathylethoxy-polysiloxanes measured in the rock salt region are discussed.
2) Up to 1200 cm−1, the common bands near 960 and 1160 cm−1 are certainly to be connected with the grouping (Si)OC2H5.
3) Moreover, characteristic bands of (Si)OC2H5 group appear near 840 cm−1 in ethoxy end-blocked dimethylpolysiloxanes and near 790 cm−1 in ethoxypolysiloxanes.
Alkylalkoxypolysiloxanes. VI. Lower Members of Cyclic Methyl-, and Ethyl-ethoxypolysiloxanes
Authors: Okawara Rokuro , Minami Gi-ichi , Oku Zensaburo 
Published: July 2006

Abstract
1) Methyl- and ethyl-ethoxydichlorosilane were hydrolyzed with considerable dropping rate using pyridine as an acid acceptor.
2) Methyl- and ethyl-ethoxycyclotrisiloxane have been prepared and characterized. The former was found to be an unstable compound.
3) Methyl- and ethyl-ethoxycyclotetrasiloxane have been prepared and characterized.
4) Some brief data of infrared absorption spectra of those compounds have been presented.
Studies on the Synthesis of Metal Complexes. III. Synthesis of Ethylenediamine-carbonato, Ammine-oxalato and Ethylenediamineoxalato Series of Cobalt (III) Complexes
Authors: Mori Motoshichi , Shibata Muraji , Kyuno Eishin , Hoshiyama Koji 
Published: July 2006

Abstract
Three series of cobalt(III) complexes were systematically synthesized from the green solution of potassium tricarbonatocobaltate(III) by means of successive substitution of carbonate by other groups:
i) Blue-K[Co en(CO3)2]·H2O,
Violet-K[Co en(CO3)2]·H2O,
[Co en2CO3]Cl·H2O, [Co en3]Cl3·3H2O
ii) Blue-K[Co(NH3)2(C2O4)2]·H2O,
Violet-K[Co(NH3)2(C2O4)2]·H2O,
[Co(NH3)4C2O4]Cl,
K3[Co(C2O4)3]·3H2O
iii) Blue-K [Co en(C2O4)2]·H2O,
Violet-K[Co en(C2O4)2]·H2O,
[Co en2(C2O4)]Cl·H2O.
Of these, the blue and the violet varieties are probably to be regarded as new complexes, stereoisomeric with each other.
Spectrochemical Study of Microscopic Crystals. XVII. The Structure of Cupric Salts with Monocarboxylic Fatty Acids
Authors: Yamada Shoichiro , Nakamura Hiroji , Tsuchida Ryutaro 
Published: July 2006

Abstract
In order to examine the structure of cupric alkanoates, the dichroism in the visible and the ultra violet region has been determined by the microscopic method with normal butyrate, valerianate, capronate and caprylate of copper (II). Visible and ultra-violet absorption spectra in organic solvents and infrared absorption spectra in Nujol mulls have been determined with the above compounds, along with cupric palmitate and stearate. Iso-alkanoates have also been examined in a similar way.
All these compounds in the crystalline state and in organic solvents are found to show similar absorption spectra having the dichroism with characteristics fundamentally similar to those of cupric acetate and propionate which had earlier been reported. From these results, it has been concluded that all the above compounds consist of the dimeric molecules.
The anhydrous forms of the compounds have been shown to consist of the dimeric molecules resembling those of the hydrated form. All the above compounds show absorption bands at about 43 and 80×1013/sec. The former is polarized along the Cu(O)4-plane and the latter along the direction binding the two copper atoms in a molecule.
Dielectric Properties of Starch. I. Audio Frequency Region
Authors: Ono Sôzaburo , Kuge Takashi , Koizumi Naokazu 
Published: July 2006

Abstract
The results of dielectric measurements for α- and β-modification of potato starch containing 0.0-13.9% sorbed water at audio frequency region are described. At different temperature regions, two different dielectric loss processes are found which we call low frequency loss process and high frequency loss process. Discussions on the low frequency loss process are made. Qualitatively, both modifications of starch have the similar dielectric properties. From the analysis of the polarization of the sorbed water, it may be concluded that sorbed waters change their properties gradually as sorption is increased, while they also loosen the micell structure of starch.
Polarographic Investigations of Vitamin C. I. On the Oxidation Waves of l-Ascorbic Acid and the Reduction Wave of Dehydro-l-ascorbic Acid
Authors: Ono Sôzaburo , Takagi Masanosuke , Wasa Tamotsu 
Published: July 2006

Abstract
l-Ascorbic acid (A. A.) shows an oxidation wave at pH less than 8 and two in a more alkaline range. After standing of A. A. in alkaline solution, the third oxidation wave has been observed.
Dehydro-l-ascorbic acid (D. A. A.) has been also tested in alkaline solution. The mechanism of the electrode oxidation of A. A. and its decomposition in alkaline solution are discussed. The reduction wave of D. A. A. has been obtained at pH 2 to 5, in which the half-wave potential is about −0.3 to −0.5 V. (vs. N.C.E.).
The wave height is about 1/1000 of its expected diffusion current at room temperature. The wave has all the typical characteristics of the kinetic current. The wave height is roughly proportional to the concentration and is not appreciably influenced by pH and the components of the buffer solution, but the shape of the wave is strongly deformed by adding small amounts of surface active substance such as gelatin.
The reduction product of D. A. A. at the dropping mercury electrode has been polarographically proved to be A. A.
Discussions are made on the configuration of the inactive form of D. A. A. and the reversibility of the A. A. and D. A. A. system.
Dielectric Constant of Liquid Consisting of Anisotropic Molecules
Authors: Yasumi Masasi , Okabayashi Hideo , Komooka Hitoshi 
Published: July 2006

Abstract
Our previous theory of dielectric constant of liquid consisting of spherical molecules having an isotropic polarizability is extended to the case when the molecule has an ellipsoidal shape and an anisotropic polarizability.
The theory is compared with experimental results for about thirty substances. The coincidence is quite satisfactory with few exceptions. For non-polar substance, better agreement between the experimental value and the theoretical value is achieved if we use our formula instead of the Lorentz-Lorenz formula.
Polarographic Studies of Metallic Complexes. II. Isothiocyanato-ammine and Related Complexes of Chromium (III)
Authors: Maki Nobufumi , Shimura Yoichi , Tsuchida Ryutaro 
Published: July 2006

Abstract
1. In neutral and unbuffered solution of 0.1 f potassium chloride, 0.1 f potassium thiocyanate, or 1 f potassium thiocyanate, the complex ion, [Cr(NH3)n(NCS)6−n]n−3 and [Cr en3]3+ were all reduced irreversibly in two steps at the dropping mercury electrode. The first diffusion current corresponds to the reduction, chromium(III)→chromium(II), and the second to the reduction, chromium(II)→chromium(0).
2. In the solution of 0.1 f potassium chloride, the polarograms of [Cr en2X2]+ type complexes show three waves. Each of the first two waves, corresponding to a gain of one electron, represents the reduction of chromium(III) to chromium(II) and the last wave, corresponding to a gain of two electrons, represents the reduction to the metallic state. As regards the first two waves, the former wave represents the reduction of the original chromium(III) complexes to chromium(II) state and the latter represents the reduction of the aquated chromium(III) complexes to chromium(II) state.
3. In agreement with the results obtained for cobalt(III) complexes by Holtzclaw et al., the trans isomer of [Cr en2(NCS)2]+ has a little more negative half-wave potential than the corresponding cis-form.
4. The polarographic stabilities of chromium(III) complexes increase in the following order of the ligands:
Cl^-&lt;NCS^-&lt;en&lt;NH_3
5. The catalytic effects on the double wave of oxygen have been found for [Cr(NH3)2(NCS)4]−, [Cr(NCS)6]3−, or cis-[Cr en2(NCS)2]+. Such special polarographic behavior was not found in the other chromium(III) complexes.
Colloid Chemical Studies on Starching Materials. II. Intrinsic Viscosity of Polyvinyl Alcohol in Soap Solutions
Authors: Nakagaki Masayuki , Nishibayashi Hiroko 
Published: July 2006

Abstract
The concentration dependence of the viscosity of polyvinyl alcohol in solutions of constant soap concentration is studied. At the soap concentration lower than its critical micelle concentration, the effect of soap on the viscosity of polyvinyl alcohol is very little. At the soap concentration near the critical micelle concentration, soap molecules are combined with the polymer, the latter behaving like a polyelectrolyte. At high soap concentration, the polymer behaves like a non-ionic polymer in a very good solvent.
Resolution of Amino Acids. I. Resolution of Racemic Phenylalanine and γ-Phenyl-α-aminobutyric Acid by Leucine Aminopeptidase
Authors: Tanaka Atsushi , Izumiya Nobuo 
Published: July 2006

Abstract
Dl-Phenylalaninamide and Dl-phenyl-aminobutyric acid amide were resolved to l-amino acids and d-amino acid amides by the partially purified leucine aminopeptidase preparation.
The products in the digests were separated conveniently by the use of ion-exchange resin, Amberlite IRA-400, in the case of Dl-phenylalaninamide, while by the differential solubility in the case of Dl-phenylaminobutyric acid amide.
The parts of d-amino acid amide hydrochlorides obtained were changed to d-amino acids by acid hydrolysis.
The Study of the Adsorption of Detergents at a Solution-Air Interface by Radiotracer Method. I. Adsorption Isotherm for the Solution of Sodium Alkyl Sulfates
Authors: Matuura Ryohei , Kimizuka Hideo , Miyamoto Shigeru , Shimozawa Ryosuke 
Published: July 2006

Abstract
The adsorption of the three alkyl sulfates, SDS, STS and SHS, at the solution-air interface has been measured directly by means of the radiotracer method. It has been proved that the surface adsorption increases with increase in the concentration and has a tendency to be saturated at concentrations near cmc for each detergent solution. The results have shown that the adsorption increases with increasing chain length. The Gibbs adsorption equation has been cheked and discussed.
Irreversible Photobleaching of the Solution of Fluorescent Dyes. V. Photobleaching of Erythrosin
Authors: Imamura Masashi 
Published: July 2006

Abstract
Photobleaching of the aqueous alcoholic erythrosin solutions in air and in vacuo was investigated. In general, erythrosin showed behavior similar to eosin. An excited dye molecule which participates in the primary processes is the long-lived species, having a lifetime of the order of 10−7sec. It was concluded that the primary process in aerobic aqueous erythrosin solution proceeds via the process, D+O2→D······O2, as in the case of eosin. It was found that excited erythrosin is somewhat more reactive than excited eosin towards dissolved oxygen, while it is less reactive towards alcohols in vacuo. Some quantitative values on the reactivities were given.
Polymerization of Methyl Methacrylate Initiated by a Combined Action of Trichloroacetic Acid and Dimethylaniline
Authors: Uehara Ryoichi 
Published: July 2006

Abstract
The polymerization of methyl methacrylate is initiated even at room temperature by a combined action of trichloroacetic acid and dimethylaniline. In case of bulk polymerization, the initial rate of polymerization is proportional to each of the square roots of the concentrations of trichloroacetic acid and dimethylaniline. In case of polymerization in benzene, the initial rate depends upon the concentration of methyl methacrylate. These relationships can be reasonably explained by assuming a bimolecular reaction between trichloroacetic acid and dimethylaniline to form radicals as the initial reaction of the polymerization. Hydroquinone acts as an inhibitor for this reaction.
Synthetic Studies on the Benzofuran Derivatives. Part V. Synthesis of Furano (2′,3′: 7,8)-isoflavone
Authors: Fukui Kenji , Kawase Yoshiyuki 
Published: July 2006

Abstract
1) Furano(2′,3′: 7,8)-isoflavone (III) was prepared from benzyl 4-hydroxy-5-benzofuranyl ketone (II) and ethyl orthoformate.
2) 7-Hydroxy-8-formyl-isoflavone (V) was obtained from 7-hydroxy-isoflavone (IV) by the hexamine method. 5′-Car-bethoxy-furano(2′,3′: 7, 8)-isoflavone (VI) was prepared from 7-hydroxy-8-formyliso-flavone (V) and ethyl bromomalonate by Tanaka’s method for benzofuran synthesis. The ester VI was hydrolyzed to the free acid VII and then decarboxylated in quinoline with copper powder to the isoflavone III.
Behavior of Zirconium-95 and Niobium-95 in Dilute Hydrochloric Acid toward Cation Exchange Resin
Authors: Yajima Seishi 
Published: July 2006

Abstract
By passing 0.2 N hydrochloric acid solution of tracer amounts of 95Zr and 95Nb (about 10−11 mol./1., 10−13 mol., or 1 μC, with respect to each nuclide) through a cation exchange resin column (Dowex 50–X8, Amberlite IR-120, or Diaion SK) and eluting with 0.2 N hydrochloric acid, a fraction containing mainly 95Nb was obtained. A fraction containing mainly 95Zr was then obtained by eluting with 0.5% oxalic acid or 3 N hydrochloric acid. With higher concentrations of non-active zirconium and niobium (about 106 mol./1. each), similar results were also obtained.
As the 0.2 N hydrochloric acid solution of 95Zr–95Nb became aged, the adsorbability of 95Zr decreased. Effect of hydrochloric acid concentration on the adsorbability of 95Zr and 95Nb was studied and the concentration range 0.1 to 0.3 N was found to be suitable for separation.
The adsorbability of 95Nb increased with an increase in the concentration of strontium ion.
Spedrochemical Study of Microscopic Crystals. XVIII. The Color and the Structure of Compounds of a Magnus Green Salt Type
Authors: Yamada Shoichiro , Tsuchida Ryutaro 
Published: July 2006

Abstract
The color and the structure of the compounds of a Magnus green salt type, [Pt(amine)4] [PtCl4], have been studied. The dichroism with crystals of [Pt(methylamine)4] [PtCl4] and [Pt(ethylamine)4] [PtCl4] has been quantitatively determined at room temperature in the visible and ultraviolet region by the microscopic method. From the measurements, the unusually deep color of the former has been shown to be ascribed to a direct type of interaction between platinum atoms. No interaction of this sort is present in the crystal of the latter, which is pink in color. It is suggested that the compounds having a formula of [Pt(alkylamine)4] [PtCl4] may generally be classified into two kinds, one being colored green and the other pink. In the crystals of the former there is a direct type of interaction between platinum atoms at the center of the planar complexes, but no interaction of such a sort is operative in the crystals of the latter.
The Formation of Stable Semiquinone of Methylene Blue by the Irradiation of Visible Light and γ-Rays
Authors: Koizumi Masao , Obata Hiroshi 
Published: July 2006

Abstract
In connection with Swallow’s observation that methylene blue in 22.9 N sulfuric acid aqueous solution containing a small amount of alcohol is reduced to a stable semiquinone when irradiated with γ-rays in vacuo, some experiments were done to investigate the role of alcohol.
It was elucidated that alcohol acts most certainly as an OH scavenger. Benzoic acid was found to be an effective OH scavenger in this case just as in usual solutions.
In the absence of alcohol either the formation of semiquinone or the irreversible decomposition of dye scarcely ever takes place in vacuo while in the aerated solution, only the latter reaction slowly proceeds. A plausible interpretation of these results was given.
It was further found that the formation of stable semiquinone can easily occur on irradiation of Swallow’s system with the visible light.
Stress Relaxation of Non-electrolytic Thermo-reversible Gels Concentration Dependence of Distribution Function of Relaxation Times. Polyvinyl Alcohol-Glycerin-Water Gels
Authors: Arakawa Kiyoshi 
Published: July 2006

Abstract
From a stress relaxation experiment by means of a chainomatic balance relaxometer the stress relaxation curves were obtained for the gel of polyvinyl alcohol-glycerin-water system, which was taken as an example of non-electrolytic thermoreversible gel. Gels of 8.3%, 9.9% and 12.1% were used. The temperature of the samples was changed between about 2°C and 75°C. Master relaxation curves were obtained for each concentration over the range of time, 10−4∼105 hours, using the time temperature superposition principle. According to Alfrey’s approximation, relaxation spectra were calculated.
The following results were obtained.
1) The master relaxation curves exhibit a fairly complicated nature on concentration dependence.
2) The logar vs. T–Ts relation obeys approximately the formula by Williams, Landel and Ferry in the range of T–Ts, −40∼0°C, but outside the range deviates fairly from it.
3) The apparent activation energy is 60 kcal./mole, which is nearly kept constant over the temperature- and concentrationrange in the present work.
4) The shift of the relaxation spectrum due to the change of concentration is not uniform over the region of box type. The maximum point in that region shifts upwards and to the longer-time side with increase of concentration.
Ultraviolet Absorption Spectra of Nitro-, Dinitro- and Trinitro-substituted Benzenes
Authors: Abe Takehiro 
Published: July 2006

Abstract
1) In ethanol and in water the progressive blue shifts of the 260 mμ band of nitrobenzene for the nitro compounds are observed in the order of increasing number of nitro groups.
2) Only TNB shows visible weak absorption bands in acetone.
3) In an aqueous solution of sodium hydroxide these nitro compounds show intense absorption bands at longer wavelengths as the number of nitro group increases.
Formation and Aging of Precipitates. VIII. Formation of Monodisperse Particles (1) Gold Sol Particles by Sodium Citrate Method
Authors: Takiyama Kazuyoshi 
Published: July 2006

Abstract
Gold sol particles prepared by sodium citrate method were monodisperse. The size of gold particles decreased exponentially with increasing initial concentration of the auric ion, and increased exponentially with the reaction temperature. At the initial stage of the reaction of the gold sol formation, the gold nuclei were formed rapidly. After the nucleation the number of particles was kept constant over the whole period of reaction and the particles grew with the autocatalysis-like reaction at the surface of the particle.
Irreversible Photobleaching of the Solutions of Fluorescent Dyes. VI. Photobleaching of Uranin in Alkaline Solutions
Authors: Imamura Masashi 
Published: July 2006

Abstract
Investigation of the photobleaching of uranin solutions has led to the same conclusions as for eosin and erythrosin, concerning the primary processes both in aqueous and in alcoholic media. Strongly alkaline solutions of uranin in aqueous alcohol show an irreversible photobleaching in vacuo. On the reactivities of the excited uranin, and on the comparison of them with those of two other xanthene dyes previously investigated, some discussions have been given.