Showing papers by "Nagoya University published in 1968"
TL;DR: Micromethods have been developed and 35S-labeled chondroitin sulfates A, B, and C in a given mixture have been precisely and rapidly determined by measuring radioactivity alone.
1,314 citations
TL;DR: An enzyme, "chondroitinase-ABC," has been purified to apparent homogeneity from extracts of Proteus vulgaris, NCTC 4636, which was adapted on a medium containing chondroit in sulfate C, and its properties have been compared with those of chondro-4-sulfatase- ABC from P. vulgaris.
1,206 citations
TL;DR: In this article, the average bubble diameter and conditions of bubble generation are obtained for the extreme cases when no coalescence is observed and the coalescence occurs at the maximum-rate.
Abstract: Bubbles which have been just generated from the porous plate are small and have an equal size, but sometime coalescence of these small bubbles occurs at a location slightly removed from the distributor, where the gas holdup is very large. Therefore, large and wide size distribution of bubbles are observed. This occurs easily in pure water and pure solvents. The surface active substances in water and solvents obstruct this coalescence of bubbles. In concentrated inorganic salt solutions, this obstruction is also recognized. For the extreme cases when no coalescence is observed and the coalescence occurs at the maximumrate, the correlations of the average bubble diameter and the conditions of bubble generation are obtained.
900 citations
TL;DR: In this paper, a class of nonlinear partial differential equations which admit a reduction to tractable nonlinear equations such as the Burgers and the Kortweg-deVries equation is presented.
Abstract: Presented is a class of nonlinear partial differential equations which admit a reduction to tractable nonlinear equations such as the Burgers and the Kortweg-deVries equation. The method of reduction is based on a singular perturbation expansion. Applications to the hydrodynamics and the plasma physics are discussed.
495 citations
TL;DR: In this paper, the self-trapping and the modulational instability of nonlinear hydromagnetic $n$ waves of right-hand polarization in a cold plasma are discussed on the basis of a nonlinear dispersive equation, which enables us to directly apply the results obtained in the nonlinear optics.
Abstract: The self-trapping and the modulational instability of nonlinear hydromagnetic $n$ waves of right-hand polarization in a cold plasma are discussed on the basis of a non-linear dispersive equation, which enables us to directly apply the results obtained in the nonlinear optics.
322 citations
TL;DR: Three isomeric disulfated disaccharides were separated from nonsulfated and monosulfated homologues and from one another by paper chromatography in 1-butyric acid-0.5 n ammonia (5:3).
298 citations
TL;DR: In this article, it was shown that the basic system of equations belongs to the exceptional case defined in that paper and in the lowest order of perturbation it can be reduced to the Kortweg-de Vries equation for all angles of propagation.
Abstract: The Reductive Perturbation Method established in a previous paper is applied to the analysis of hydromagnetic wave of small but finite amplitude propagating in a cold plasma. It is shown that the basic system of equations belongs to the exceptional case defined in that paper and in the lowest order of perturbation it can be reduced to the Kortweg-de Vries equation for all angles of propagation.
215 citations
TL;DR: In this paper, a simple method based on the characteristic property of the electric free energy was proposed to calculate the repulsive force between parallel rod-like macroions in a solution as a function of the charge density on rods.
Abstract: This paper gives a very simple method based on the characteristic property of the electric free energy to calculate the repulsive force between parallel rodlike macroions in a solution as a function of the charge density on rods. The total extensive force (∂f/∂X) of an assembly of m rods of length l and charge number n (charge density − neo /l) at small extension X in the absence of low molecular sals is given by
where z is the valency of counterions and Q (= neO2/ekTl) is a dimensionless quantity representing the charge density. The repulsion between two parallel rods is given by putting m = 2. At large charge densities the repulsion is very much smaller than the direct coulomb force between charged rods, even at small distances. The addition of low molecular salts does not depress the repulsion appreciably, as long as the average concentration of salt ions is much smaller than the concentration of counterions accumulated in the space between rods. The effect of fluctuation of the coumerion distribution is also analyzed, and it is found that the attractive force due to the ion fluctuation may predominate over the above repulsive force in the case of polyvalent counterions and rods of high charge densities at small distances.
177 citations
131 citations
TL;DR: Myosin A-like protein (plasmodium myos in A) has been isolated by ultracentrifugation of myosin B solution in the presence of ATP and Mg 2+ and can combine with plas modium F-actin and muscle F-actsin to form actomyosin-like complexes.
125 citations
TL;DR: METHANOL extracts of immature seeds of Pisum sativum exhibited fairly strong auxin-like activity when assayed by hypocotyl swelling of Phaseolus mungo, and an active principle from the neutral fraction was identified as methyl 4-chloroindolyl-3-acetate by synthesis.
Abstract: METHANOL extracts of immature seeds of Pisum sativum exhibited fairly strong auxin-like activity when assayed by hypocotyl swelling of Phaseolus mungo1. We isolated an active principle from the neutral fraction of immature seeds2; it was identified as methyl 4-chloroindolyl-3-acetate by synthesis. Preliminary examination showed that its auxin activity against Avena first internode and section tests was comparable with that of methyl indolyl-3-acetate while its activity was stronger against the hypocotyl swelling test of Phaseolus mungo. Gandar and Nitsch3 independently isolated the same auxin from the same immature seeds, and found it to be a methyl ester of chlorine containing indolyl-3-acetic acid.
TL;DR: In this article, two toxic compounds, anisatin and neoanisatin (XXV), were isolated from Illicium Anisatum L and the structures of these compounds were established by chemical and spectral methods.
TL;DR: Based on detailed observations of the 19 cases, etiological consideration of the closure of the ductus venosus, diagnostic importance of catheterization of the inferior vena cava with cavography, and surgical considerations which aimed to control fatal hemorrhage from esophageal varices in these cases were discussed.
TL;DR: Kinetic analyses of the CO2-fixation reaction catalyzed by RuDP-carboxylase prepared from spinach leaves showed that the reaction rate vs. NaH CO3 concentrations curve was deviated from the Michaelian type, indicating a homotropic interaction of the NaHCO3 molecule.
TL;DR: It was concluded that during reconstitution flagellar filaments grow in a unidirectional manner.
TL;DR: A crucial role of the Purkinje network in determining the course of excitation spread was recognized in the simulated process of both normal beats and extrasystoles, and the possibility of combining the scheme with a method of reconstruction of QRS complexes by means of “transfer impedance” values was pointed out.
Abstract: Simulation by a digital computer of propagated excitation in the ventricular myocardium has been accomplished. Experience with the program in normal conduction and in one example of abnormal conduction, an extrasystole, is presented. Results of the simulation process were in harmony with observations in animal experiments. This justifies attempts to apply this scheme to the analysis of abnormal ventricular excitation caused by other disturbances. A crucial role of the Purkinje network in determining the course of excitation spread was recognized in the simulated process of both normal beats and extrasystoles. New knowledge is expected from this scheme when applied to other types of abnormal excitation. The possibility of combining the scheme with a method of reconstruction of QRS complexes by means of "transfer impedance" values was pointed out.
TL;DR: In this paper, a novel Auxin, Methyl 4-Chloroindoleacetate from immature seeds of Pisum sativum is described. But this is not the case in this paper.
Abstract: (1968). Isolation of a Novel Auxin, Methyl 4-Chloroindoleacetate from Immature Seeds of Pisum sativum. Agricultural and Biological Chemistry: Vol. 32, No. 1, pp. 117-118.
TL;DR: The sex ratios of the progeny of hormone-treated goldfish provide evidence that the male is heterogametic (XY) and induction of sex reversal in both directions by heterologous sex hormones was successfully accomplished.
Abstract: Methyltestosterone and estrone were administered orally to fry of the goldfish, Carassius auratus, daily for two months; thereafter, they were raised on a normal diet. All but one of the methyltestosterone-treated fish developed into males, while all estrone-treated fish developed into females. Of seven methyltestosterone-treated males mated with normal females, six produced progeny in a 1 ♀:1 ♂ ratio and the remaining one produced only females. Of eleven estrone-treated females mated with normal males, seven produced progeny in a 1 ♀:1 ♂ ratio and four yielded offspring in a ratio of 1 ♀ : 3 ♂. Induction of sex reversal in both directions by heterologous sex hormones was successfully accomplished. The sex ratios of the progeny of hormone-treated goldfish provide evidence that the male is heterogametic (XY).
TL;DR: In this paper, the fundamental absorption coefficient of liquid water is found to comply with Urbach rule at the low energy tail of the water fundamental absorption, while hexagonal and amorphous ices show only a gradual increase of absorption intensity toward the higher energy in the range from 7 to 10 eV.
Abstract: Fundamental absorption bands of water are studied in its various phases. Cubic ice has a well-defined absorption band at about 8.7 eV, while hexagonal and amorphous ices show only a gradual increase of absorption intensity toward the higher energy in the range from 7 to 10 eV. Absorption coefficient of liquid water is found to comply with Urbach rule at the low energy tail of the fundamental absorption.
TL;DR: In this article, various ferromagnetic quantities, Curie temperature, spin susceptibility, etc., for fcc Ni-alloys are calculated in the band model and the Invar effect for Fe-Ni alloys is discussed.
TL;DR: Full restoration of the enzyme activity by the addition of cysteine to the PCMB-inactivated enzyme protein was accompanied by restoration of resistance to proteolytic attack, supported by electron microscopic observations of the reconstituted protein.
TL;DR: From results the site on actin for binding divalent cations seems to have a radius of the order of 1.0 A, and the site seems to be inflexible, although the amount of exchange depended on their concentrations.
TL;DR: The optical rotatory dispersion and circular dichroism of a double-stranded ribonucleic acid from rice dwarf virus have been measured, providing evidence of a doublestranded helical structure.
TL;DR: In this article, the authors defined coefficients in Eq. (12) and Eq (12c) for linear combinations of linear combinations in terms of the ratio of the coefficient in Eqs. (8d) and (8c) of the coefficients in each of these coefficients.
Abstract: = coefficient in Eq.(ll) = coefficients in Eq. (12) = coefficients in Eq.(l3) = feed concentration of solid = diameter = collection efficiency of cyclone = feed rate of particles = particle hold-up Ki, K2 = coefficients in Eq.(8d) kpe -coefficient in Eq.(3) [-] [-] [-] [kg-solid/kg-air] [m] [kg/kg] tkg/s] [kg] r I = length of duct = penetration of particles through cyclone = radius of curvature of curved duct = dimensionless group denned by Eq.(8d) or Eq. (8c)
TL;DR: In this paper, the dependence of the impurity distribution on the speed of a zone pass and on the concentration of impurity were studied in KCl doped with lead ions, whose concentration was determined by the measurements of optical absorption as well as by the usual chemical analysis.
Abstract: Distribution coefficients of several monovalent and divalent impurities were obtained for NaCl, KCl, NaBr and KBr by the method of zone melting performed in the respective halogen atmosphere. Dependence of the impurity distribution on the speed of a zone pass and on the concentration of impurity were studied in KCl doped with lead ions, whose concentration was determined by the measurements of optical absorption as well as by the usual chemical analysis. For the monovalent impurities, the distribution coefficients obtained from distribution curves agree well with those calculated from the thermodynamical expression of distribution coefficient using the theoretical energy of solid solution. The energy of solid solution of divalent impurities was calculated from the experimentally obtained distribution coefficients taking the equilibrium of Schottky defects into account and was compared with that of lattice calculation.