bluuebunny/crossref_metadata_2025_split huggingface dataset:
Studies on Foams. V. The Effect of Electrolytes on Triphenyl Methane Dye Solutions
Authors: Nakagaki Masayuki 
Published: July 2006

Abstract
Effects of sodium chloride, hydrochloric acid, and sodium hydroxide on the surface tension and foam formation of solutions of crystal violet and brilliant green were measured. By the addition of sodium chloride surface tension decreases and foam formation shows a maximum. In the cases of hydrochloric acid and sodium hydroxide, surface tension increases with the decrease of pH. and foam formation shows a maximum at about pH=2. These results were accounted by the change of surface activity of dye ion and the displacement of the equilibrium (micelle) \ightleftarrows (ion).
A New Method of the Graphical Representation of a Quarternary System on a Plane Surface
Authors: Tanaka Yasuo 
Published: July 2006

Abstract
A new method of representing the phase equilibrium of a quarternary system under a constant temperature and pressure on a plane surface has been proposed. The method is to project the three-dimensional space model of the system, axes of which intersect each other at right angles, orthogonally on two of the axual planes. The two projections can represent the complete state of the system, and the treatment of the figure is quite simple and convenient.
The crystallization processes in such a quarternary system have been solved mathematically quite in general, and the application of the present method of graphical representation on the solution of the processes has been illustrated.
Studies on Foams. VI. Theory of Foam Formation
Authors: Nakagaki Masayuki 
Published: July 2006

Abstract
Foam formation of aqueous solutions of both alcohols and electrolytes are accounted under the assumption of parallelism between the foam formation and the energy required to remove the unit area of adsorption layer from the surface. The maximum observed at the concentration of about 45 % for alcohol solutions are also accounted. The relative relation between some electrolyte solutions is accounted under the assumption that the thickness of adsorption layer increases in the sequence of lyotropic series of anions: Cl−, NO3−&lt;SO4−−&lt;OH−.
Wettability of Solid Surface. IV. Wettability of Palmitic Acid Surface towards Aqueous Salt Solutions
Authors: Inaba Ayako 
Published: July 2006

Abstract
Wettabilities of purified paraffin, crude paraffin, palmitic acid and cetyl alcohol are measured towards aqueous solutions of potassium, calcium, aluminum and thorium salts. It is pointed out that palmitic acid surface becomes remarkably wettable by the contact with aqueous solution of thorium or aluminum salt even in the extreme dilution. Such an increase in wettability can neither be explained simply by ζ-potential change of the palmitic acid surface in those solutions nor overturning of the molecule in surface layer. Alternative explanations are suggested.
An Improved Method of Colorimetric Determination of Vanadium in the Presence of a Relatively Large Amount of Iron
Authors: Murakami Yukio 
Published: July 2006

Abstract
Contrary to the general belief, the author confirmed the presence of iron in the filtrate from the carbonate fusion melt of brown coal ash or rock. The interference leading to lower results due to ferrous iron is more serious than that due to ferric iron as the vanadate ion is reduced to vanadyl when acidified with sulfuric acid. Consequently the oxidizing procedure with potassium permanganate is required to diminish this undesirable effect. If a considerably large amount of iron is present, it is necessary to make a preliminary separation of iron from vanadium in a slightly alkaline medium with oxine and chloroform. Hence the vanadium determination can be carried out following the directions recommended.
The separation method proposed by the author was spectroscopically tested and it was shown that a larger amount of iron can be separated without any trace of vanadium being carried down. However this procedure is not always required and can be eliminated as the quality of the sample to be tested varies.
The interference due to the presence of ferric iron can be reduced to some extent, even when a considerably large amount of iron is present in the solution prepared for the color comparison, by warming it and keeping it on standing for several minutes. Some experiments on the determination of the vanadium content of various samples were also conducted, with the results that the modified method can be used as well with a considerable accuracy.
On Some Applications of the Nakamura-Kuroda Theory of the Sedimentation of Colloid in a Vessel having Inclined Walls
Authors: Katsurai Tominosuke 
Published: July 2006

Abstract
As a result of the application of the Nakamura-Kuroda theory of the sedimentation of colloid in an inclined cylinder it has been shown that the initial sedimentation velocity of colloid increases in a vessel consisting of two cylinders having different radii, the radius of the upper cylinder being smaller than that of the lower one. The amount of the increase is determined by the ratio of the sectional areas of the two cylinders.
The N-K theory has been formally extended in the flotation of emulsion in a centrifugal field, and the design of the de Laval centrifuge has been considered in the light of the results obtained. A feasible, though not quite rigorous, explanation of the consistency of the form of centrifuge has been given.
Fluorometric Microdetermination of Uranium. II. Extraction of Uranium
Authors: Nakanishi Masaki 
Published: July 2006

Abstract
A minute amount of uranium suitable for the fluorometric method of determination is effectively precipitated from the solution together with hydrous ferric oxide as co-precipitator. The efficiency of co-precipitation seems to be nearly perfect for the purpose, and the adsorption and the digestion effect were observed in particular from the analytical standpoint.
Researches on the Polarographic Diffusion Current. II. Distribution of the Depolarizer in the Vicinity of Dropping Mercury Electrode and Some Experimental Verifications of the Revised Equation
Authors: Kambara Tomihito , Tachi Isamu 
Published: July 2006

Abstract
The differential equation representing the distribution of the depolarizer in the vicinity of dropping mercury electrode was integrated and the formula for the polarographic diffusion current was derived, which is identical with the equation obtained, as reported in our previous paper, in another way. Several experimental results were found to be in accordance with this equation; it may be said that our improved theory is not only the denial of the Ilkovic theory but also at the same time inclusive of the old theory.
On the Linear Boundary Energy in Two-Dimensional System
Authors: Akamatu Hideo , Nakagaki Masayuki 
Published: July 2006

Abstract
A definition of the linear boundary tension of the two-dimensional film was conceived, which corresponds to the surface tension in the three-dimensional system. The physical meaning of this conception was investigated according to the classical Gauss theory. A rough estimation of this value was made for the surface film of myristic acid.
Fusion and State Equation of Simple Liquids. II. Critical Data and Fusion Parameters
Authors: Kigoshi Kunihiko 
Published: July 2006

Abstract
The molecular arrangements in liquid state may be characterized by assignement of the number of nearest neighbors on each molecule, and distances between two nearest neighbors. The assumption is made on the distribution of distances r between the two nearest neighbors which does not take a definite value as in the crystalline state but is distributed over the region of [r(1+δ), r(1−δ)]. The partition function and state equation are deduced under these assumptions using proper values of δ expected by X-ray diffraction on liquid argon. The critical constants for a simple liquid are determined which agree well with experimental values. The condition for the equilibrium between liquid and solid crystalline states is obtained on the basic assumptions that the essential differences of liquid and solid states consist in the difference of values of δ and the number of nearest neighbors around each molecule. The calculated melting temperature, volume and entropy inerements by fusion and pressure dependences of these fusion parameters agree well with experimental values.
Analytical Chemistry by Means of Organic Compounds XIV Electrolytic Reduction of Organic Reagents at the Dropping Mercury Cathode and Its Application to Amperometric Titrations — 8-Hydroxyquinoline (1)
Authors: Ishibashi Masayoshi , Fujinaga Taitiro 
Published: July 2006

Abstract
The behavior of electrolytic reduction of oxine at the dropping mercury electrode was discussed. The reduction of oxine in alkaline medium is simple and reversible at the electrode and the possibilities of amperometric titrations with oxine in these mediums were researched.
Studies on the Irreversible Polarographic Wave of Nickel thiocyante Complex
Authors: Tanaka Nobuyuki 
Published: July 2006

Abstract
The polarographic reduction wave of nickel thiocyanate complex has been studied for the purpose of clarifying the reduction mechanism of the complex. The current-voltage curves of the complex were measured in media of KSCN-KCl and KSCN-KNO3. In the medium of KSCN-KCl, the reduction wave involved the kinetic current as well as the diffusion current, when the concentration of potassium thiocyanate was less than 0.2 M. The relation of log I⁄(Il−I) and V held a straight line, but its slope was not in accord with the value expected from the reversible reduction. From these experimental results and the polarograms obtained with the Kalousek’s method, the reduction of the complex was confirmed to proceed irreversibly at the dropping mercury electrode.
The redaction mechanism of the complex and the number of thiocyanate ions coordinated to the centered metal ion in the supporting electrolytes containing various concentrations of potassium thiocyanate were estimated from these experimental results, when the theoretical consequence for the activation-controlled reduction of the complex ion reported in the previous paper was applied.
Calculations of the Energy Levels of Cycloöctatetraene(C8H8)
Authors: Tanaka Ikuzo , Shida Shoji 
Published: July 2006

Abstract
The energy levels of cycloöctatetraene as D2d and D4d were calculated by the H-L-S-P method. Then we showed that the ground state of C8H8 (D2d and D4d) may be diamagnetic. The resonance energy of C8H8 (D2d and D4d) is about several kilocalories (about ten per cent of that of benzene) from thermochemical data and numerical calculation. The wave length of absorption spectra calculated assuming D2d is in better agreement with the experimental result than that calculated assuming D4d.
Selective Catalysis. The Catalytic Reaction between Acetylene and Hydrogen
Authors: Tamaru Kenzi 
Published: July 2006

Abstract
1) The catalytic hydrogenation of acetylene was investigated by Pd-Alumina under various conditions.
2) The hydrogenation of acetylene proceeds in two distinct steps. The first step consists of the reduction and polymerization of acetylene, and the second step the reduction of ethylene to ethane. The second reaction starts after all of the acetylene is reduced to ethylene, and is indicated by a sudden increase in the rate of hydrogenation.
3) The results indicate that acetylene is strongly adsorbed on the surface of the catalyst and the inhibition of the hydrogenation by acetylene is pronounced.
4) It was found that the final products of the hydrogenation can be made wholly into ethylene or ethane and that the highest yield of ethylene is obtained possibly, when acetylene content is small, by avoiding the polymerization of acetylene.
A Note on the Theory of Solution of Hydrated systems
Authors: Ikeda Toshio 
Published: July 2006

Abstract
(1) Upon taking the hydration into consideration the thermodynamical properties of solutions of electrolytes and non-electrolytes can be well represented over the wide range of concentration.
(2) The values of hydration number of non-electrolytes seem to be related to the configuration of solute molecules. The hydration number was determined for 37 solutes.
Fungus and Enzyme. Preparation of Aspergillus Oryzae Amylase and its Use in Bread Making
Authors: Harada Taichi 
Published: July 2006

Abstract
1. The fungal amylase preparation containing rich proteolytic but poor diastatic enzyme has been prepared by precipitating Koji water extract with the amount of alcohol which gives around fifty to sixty volume percent solution.
2. A strong fungal amylase but very weak proteolytic enzyme preparation has been prepared by fractional precipitation of the filtrate of 1 by adding further alcohol up to seventy percent or over.
3. The possibility of utilizing fungal diastase preparation in the bread making industry has been pointed out.
Fundamental Studies on the Current-Voltage Curve in Polarography. IV.On the Reduction Wave of Organic Compounds—Especially on the Wave which Involves the “ Kinetic Current”
Authors: Tamamushi Reita , Tanaka Nobuyuki 
Published: July 2006

Abstract
Of the oxidation-reduction reaction of organic compounds, the case, in which the undissociated molecule of an organic acid is reduced at the more positive potential than the corresponding dissociated anion and the equilibrium concentration of the reducible form at the electrode surface is kept by the diffusion process and the recombination reaction at the electrode surface, has been taken into consideration. Under such conditions, the general formulae for the polarographic current-voltage curve have been derived, and the special case which involves the “ kinetic current” has been investigated. The theoretical discussions on the limiting current and the shift of the half-wave potential with the change of pH have been carried out. Moreover, the results obtained have been applied to interpret the properties of the wave of pyruvic acid observed by R. Brdicka. A considerably good agreement between the experimental data and the theoretical results has been obtained, and it is probably said that the properties of the various polarographic waves and the mechanism of the electrode process can be investigated by the analogous treatment mentioned above.
Molecular Orbital Treatment of Tropolone
Authors: Kurita Yukio , Kubo Masaji 
Published: July 2006

Abstract
The molecular orbital treatment was carried out on tropolone. The π -electron distribution, interatomic distances, free valence indices and dipole moment were derived. It was found that the dipole moment is very high (second approximation value of π -electron moment = 4.4 D) owing to resonance and lies along a line from the center of the ring to the middle point between two O-atoms with its positive end at the ring and that the resonance energy amounts to about 1.5 times that of benzene in general agreement with experimental results. It was shown that the substitution by electrophilic atoms and groups are most liable to occur at C-atoms 7, 3 and 5.
Heterogeneous Hydrolytic Degradation of Cellulose
Authors: Matsuzaki Kei , Sobue Hiroshi 
Published: July 2006

Abstract
Purified cotton and wood pulp were hydrolyzed in 3.5 N HCl for 4-120 hours at 30°. The hydrolyzed products were nitrated with the mixtures of H3PO4-HNO3-P2O5 at 0° for 6 hours. Acetone solutions of the nitrates were fractionally precipitated with ligroin, and chain length distribution curves were plotted. These curves show no positive proof of the presence of the weak bonds which split 5000 times faster than the usual glucosidic bonds. These are well explained with the submicroscopic structure of cellulose.
Thermal Diffusion Coefficient and its Relation to Ordinary Diffusion Coefficient of Solutions
Authors: Hirota Kozo , Miyashita Isao 
Published: July 2006

Abstract
Theoretical formulas of thermal diffusion coefficient D′ and its relation to ordinary diffusion coefficient D have been derived by applying the activated state method to the solution in which stationary thermal gradient exists. Regarding the solution of small solute molecules, whether it is electrolytic or nonelectrolytic, the agreement with experimental result is good, while, regarding the solution of large solute molecule or molten salt, the discreparcy amounts to one order of magnitude.
Conductometric Titration of Cation Exchange Resins
Authors: Sasaki Tunetaka , Inaba Ayako 
Published: July 2006

Abstract
Cation exchange resins in H-form each having only one kind of exchange group were titrated with sodium hydroxide solution conductometrically. The results were analysed, and exchange capacity and tendency of each exchange group were determined. A mixture of two resins, each having one kind of exchange group was titrated. The analysis of the results gave adsorption values which agree well with that expected from the determination for the separate resin. From the titration results for more complex cation exchange resins the number of the sorts of exchange groups was estimated and each group was identified.
Studies on the Magnetic Dichroism of Dye-Gelatin Films. IV. Confirmation of Photomagnetism by means of Magnetic Dichroism in Dye-Gelatin Films Excited by Light
Authors: Yamamoto Daijiro 
Published: July 2006

Abstract
The Differences which appeared in the magnetic dichroism-time relations of dye-gelatin films by excitation of light were discussed under assumption of photomagnetism effect. Results obtained are to some extent in good accordance with experimental results qualitatively. The author, however, can not decide that this effect is entirely due to the photomagnetism. It will be valid, to some extent, to regard the effect to be due to photomagnetism.
Synthetic Studies on Thiothreonines. II
Authors: Kinoshita Mitsuhiro , Umezawa Sumio 
Published: July 2006

Abstract
(1) Chlorination of Dl-N-benzoylallothreonine ethyl ester with thionyl chlodide in benzene in the presence of pyridine gave the lower-melting isomer of ethyl-Dl-α-benzamido-β-chlorobutyrate, m. p. 84.5-86.5°, in a yield of 57%. On the other hand, chlorination with phosphorus pentachloride in chloroform gave the higher-melting isomer, m. p. 99-100°.
(2) Two isomers of α-benzamido-β-benzylmercaptobutyric acid (derivatives of thiothreonine A and B) were synthesised. The chlorine atom of ethyl Dl-α-benzamido-β-chlorobutyrate could be replaced by a sulfhydryl group by the action of benzyl mercaptan. A remarkable effect of different solvents on this replacement reaction was described.
Research on Activation Energy. III. On Activation Energy for the Adsorption of Hydrogen on Reduced Copper
Authors: Kume Sanshiro , Otozai Kiyoteru 
Published: July 2006

Abstract
The activation energy for the activated adsorption of hydrogen on copper metal has been calculated by the use of the empirical rule previously proposed. The calculated value 19.4 kcal./mole agrees very well with the observed value 20 kcal./mole of T. Kwan. It has been concluded that hydrogen will be adsorbed more quickly on the surfaces (110) and (111) than on the surface (100) of copper crystal.
Studies on Monomolecular Films. IX. The Effect of Dissolved Dyes on the Monolayer of Stearic Acid
Authors: Matuura Ryôhei 
Published: July 2006

Abstract
The interaction between the dyes dissolved in water and the monolayer of stearic acid spread on it was studied and discussed. It was shown that a remarkable expansion of the monolayer of stearic acid in the presence of phloxine and congo red was explained chiefly by the van der Waals adsorption, while that in the presence of basic dyes was explained chiefly by the ionic interaction. It was suggested that the interaction between basic dyes and stearic acid was analogous in some respects to the formation of soaps of such metals as thorium, aluminum, etc.
Fluorometric Microdetermination of Uranium. IV. Measurement of the Fluorescence Intensity and Determination of the Uranium Content in Natural Substances
Authors: Nakanishi Masaki 
Published: July 2006

Abstract
Details of the methods of measuring the relative intensity of the fluorescence were described, in which the photographic spectral photometry and the visual observation method were related.
Several examples of uranium contents in rocks and sinter deposits determined by this method are treated from the geochemical interest.
Dipole Moments of Halogen-Derivatives of Hinokitiol
Authors: Kurita Yukio , Nozoe Tetsuo , Kubo Masaji 
Published: July 2006

Abstract
The dipole moments of halogen-derivatives of hinokitiol (4-isopropylcyc]oheptatriene-2,4, 6-ol-2-one-1) were measured in benzene solution at 25°. The values obtained are: β-monobromohinokitiol (3-bromo-), 4.40 D; α-monochlorohinokitiol (5-chloro-), 2.70 D; β-monochlorohinokitiol (7-chloro-), 4.38 D; γ-monochlorohinokitiol (3-chloro-), 4.74 D; α-dichlorohinokitiol (3,7-dichloro-), 4.46 D. By analysing the results obtained, the position of substituents in the halogenated hinokitiols were determined and are given immediately after each name of these compounds in parentheses.
The Structure of Surface-Denatured Protein. IV. The Molecular Weight, Surface Area and Shape of the Surface-Denatured Hemoglobin Molecule
Authors: Imahori Kazutomo 
Published: July 2006

Abstract
1. The molecular weight of the surface denatured hemoglobin is calculated from the FA-F curve, to be about 35,000, which shows that the hemoglobin molecule splits into two pieces by surface denaturation at pH=6.
2. From the compressibility data, and surface denatured hemglobin molecule is considered to cover about 3065 Å.2 of area.
3. The ratio of two axes is obtained by the surface diffusion experiment to be 1.12.
4. The thickness of the molecule is determined to be 19 Å. by the optical method, and the surface-denatured hemoglobin molecule is considered to be a perfectly circular disk, the radius of which is about 30 Å. and the thickness about 19 Å.
Dipole Moments of Some Hydroxyl Compounds
Authors: Higasi Keniti 
Published: July 2006

Abstract
Dipole moments of cresols, chlorophenols and nitrophenols were measured in toluene at 0°, 25°, 50° and 75°C. They are found to be in general agreement with the corresponding values measured in benzene. Further, factors which may affect the moment are considered in detail. As a connected topic it is shown that some anomalies of hydroxyl compound in ether are explainable by the hypothesis of hydrogen bond formation with the solvent.
Wettability of Solid Surface. V. The Effect of Metallic Cations on Wettability of Stearic Acid
Authors: Inaba Ayako 
Published: July 2006

Abstract
The effect of the solution of various metallic ions at varying pH upon the wettability of stearic acid surface has been studied. These ions are adsorbed by stearic acid surface in characteristic pH region and are classified into the following three groups, according to their effects on wettability.
(1) (Remark: Graphics omitted.)
(2) (Remark: Graphics omitted.)
(3) (Remark: Graphics omitted.)
The classification has been based upon the structural characteristics of the ions, especially the co-ordination tendency of the ions. The theory of overturning of molecules in surface layer is also one of the probable supports of these opinions.