Showing papers by "Osaka University published in 1968"
TL;DR: It was demonstrated that the sperm immobilization test was the best procedure and the sperm-immobilizing factor in patient's serum which gave the strongest positive test was analyzed immunologically.
382 citations
TL;DR: It has been suggested that several hypothetical hydrocarbons with conjugate π-electron systems will show ferromagnetic spin alinement due to the topological nature of the MO's.
Abstract: It has been suggested that several hypothetical hydrocarbons with conjugate π-electron systems will show ferromagnetic spin alinement due to the topological nature of the MO's. Some qualitative discussions have been given for the mechanism of the realization of this “ferromagnetic state”.
295 citations
TL;DR: The gel-forming β-1, 3-glucan of A lcaligenes faecalis var. myxogenes 10C3, mutant K, has been shown by methylation and periodate oxidation studies to be a β- 1, 3 -d -glucans.
250 citations
TL;DR: The lysozyme of bacteriophage T4 was purified to apparent homogeneity from lysates of the phage grown on Escherichia coli and was found to have muramidase activity, as egg white lyso enzyme does, when cell walls of Micrococcus lysodeikticus were used as substrate.
213 citations
TL;DR: The results indicate that the increase in phosphorylase activity caused by splanchnic-nerve stimulation can be attributed to enzymic conversion of the dephosphophosphorylases to the active form during stimulation.
185 citations
TL;DR: In this article, a complete classification of isogeny classes of abelian varieties over finite fields in terms of Frobenius endomorphism is given and applications of its applications are discussed.
Abstract: In the present paper we shall give a complete classification of isogeny classes of abelian varieties over finite fields in terms of Frobenius endomorphism and indicate some of its applications. Let $p$ be a fixed prime number and $\\Omega$ the algebraic closure of the prime field of characteristic $p$ . Let $k_{a}$ denote the finite field with $p^{a}$ elements. We consider $ k_{a}\\subset\\Omega$ . By an algebraic number field we mean a subfield of the complex number field $C$ which is of finite degree over the rational number field
177 citations
TL;DR: It was concluded that cytochrome b5 preparations hitherto purified are protease-resistant cores of the native hemoprotein.
176 citations
TL;DR: The deep sleep waves of the LGB, which were mass activity of spiky form seen during deep sleep, were found to be correlated to the deep sleep burst of the P unit spontaneous activity in their negative phase, suggesting that orthodromic activation of the I units is mediated via the P units.
Abstract: Unit activities of the lateral geniculate body (LGB) were studied in free behaving cats during arousal, light sleep (sleep with high-voltage, slow EEG) and deep sleep (sleep with low-voltage, fast EEG). The LGB units were classified into two types according to their response patterns to stimulation of the optic chiasm and the visual cortex; by both types of stimulation the P units were fired singly at short latencies and the I units were fired repetitively at long latencies.1. Spontaneous activity of the P units changed markedly upon alternation of the behavioral state. During arousal the P units showed well-spaced regular discharges. During light sleep the grouped discharges consisting of 2-5 spikes became manifest intermingled with sporadic discharges. In deep sleep spontaneous activity was accelarated with occasional bursts of spikes (deep sleep bursts) lasting about 0.5 sec.2. The deep sleep waves of the LGB, which were mass activity of spiky form seen during deep sleep, were found to be correlated to the deep sleep burst of the P unit spontaneous activity in their negative phase. Suppression of the unit activity was seen during their positive phase.3. The rate of spontaneous activity of the P units was lowest during light sleep and increased from arousal to deep sleep.4. The firing probability of the P units to chiasmatic and visual cortical stimulation was lowest during light sleep and increased from arousal to deep sleep. This was true of the firing probability to the spontaneous synaptic bombardment.5. The I units did not alter significantly the rate of spontaneous activity and the strength of responsiveness to visual cortical stimulation when sleep changed from one type to another. Responsiveness of the I units to chiasmatic stimulation was higher during deep sleep than during light sleep, suggesting that orthodromic activation of the I units is mediated via the P units.
154 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
103 citations
TL;DR: In this article, the relationship between IR-spectra and the sequence lengths of the segments which assume the regular helical conformation in isotactic polymer chains was investigated for isotactic copolymers of normal and deuterated styrenes.
Abstract: In order to elucidate the relationship between IR-spectra and the sequence lengths of the segments which assume the regular helical conformation in isotactic polymer chains, the IR-spectra have been measured for isotactic copolymers of normal and deuterated styrenes in various ratios. The absorption intensities of the bands characteristic of the TG skeletal conformation of the isotactic polystyrene molecule have been investigated in relation to the length of the normal styrene sequences in the copolmers.
In the case of the highly crystalline samples of the copolymers, the absorption coefficients per normal styrene unit have been found to decrease with decreasing statistical sequence length of the normal styrene units in the copolymer chain. A simple statistical treatment of the intensity data has provided the critical length which is necessary to produce each characteristic band. Each band has its characteristic value of the critical length depending on the vibrational mode to which the band is due.
The band intensities measured on the carbon disulfide solution at a low temperature have shown a dependence on the regular sequence length very similar to that of the highly crystalline samples. This indicates that the molecule assumes rather regular helical conformation in solution at a low temperature.
An Hand der IR-Spektren verschiedener isotaktischer Copolymerer aus „normalem” Styrol und deuteriertem Styrol wurde die Frage untersucht, wie sich die Sequenzlangen von Segmenten, die in Helixkonformation vorliegen, in den IR-Spektren bemerkbar machen. Dazu wurden die Extinktionen der fur die TG-Konformation charakteristischen Banden mit den SequenzIangen des „normalen” Styrols in Beziehung gesetzt. Bei hochkristallinen Copolymeren nehmen die auf einen „normalen” Styrolgrundbaustein bezogenen Absorptionskoeffizienten ab, wenn die statistische Sequenzlange der „normalen” Styrol-Grundbausteine abnimmt. Eine einfache statistische Behandhlung der Extinktionsdaten erlaubt es, die kritischen Sequenzlangen anzugeben, die notig sind, um die verschiedenen charakteristischen Absorptionsbanden hervorzurufen; die fur jede Bande Charakteristische kritische Sequenzlange hangt von dem Schwingungsmodus ab, der sie verursacht. Die bei niedriger Temperatur in Schwefelkohlenstoff-Losung gemessenen Extinktionskoeffizienten zeigen eine Abhangigkeit von der Sequenzlange, die derjenigen bei hochkristallinen Proben sehr ahnlich ist. Dies'zeigt, das die Molekule bei niedriger Temperatur und in Losung eine ziemlich regelmasige Helixkonformation annehmen.
TL;DR: In this paper, the crystal structure of polyglycolide, the simplest polyester of the type [(CH2)zCOO]n was determined by interpretation of the X-ray diffraction patterns of the fibers.
Abstract: In the course of structural study of aliphatic polyesters, the crystal structure of polyglycolide, the simplest polyester of the type [(CH2)zCOO]n was determined by interpretation of the X-ray diffraction patterns of the fibers. The crystallographic data are: a = 5.22 A, b = 6.19 A, c (fiber axis) = 7.02 A, the orthorhombic spacegroup, Pcmn-D. Two molecular chains pass through the unit cell. The crystal structure was determined by the help of two dimensional and three dimensional FOURIER syntheses. The planar zig-zag chain molecules form a sheet structure parallel to the ac plane and have not the polyethylene type arrangement. High density of the crystallite, 1.69 g/cm3, namely the tight molecular packing and the close approach of the ester groups might stabilize the crystal lattice and contribute to the high melting point of this polymer.
TL;DR: In this paper, the theory of helical and modified-helical spin ordering, confining to molecular field treatments and spin-wave calculations, is discussed, and the role of conduction electrons in the exchange interaction is discussed.
Abstract: Publisher Summary This chapter discusses the theory of helical and modified-helical spin ordering, confining to molecular field treatments and spin-wave calculations Modifications of a helical spin order arise from anisotropy energies and an external magnetic field Also, a description of the theory of complex helical spin configurations in complex crystalline lattices is given A basic assumption made is that there exist isotropic exchange interactions between atomic spin moments of further neighbors as well as between neighboring moments The coefficients of these exchange interactions are assumed as given constants In this sense, the spin system dealt with may be called the Heisenberg magnet Experimental observations relevant to the theory are referred to and are useful to elucidate the theory This chapter deals with the role of conduction electrons in the exchange interaction; it reviews and discusses the observed magnetic and other properties of heavy and light rare-earth metals, and finally discusses the spin density wave in chromium
TL;DR: There seems likely that there are two separate mechanisms in the liver for controlling phosphorylase activation and glycogenolysis, and that neural control ( by sympathetic nerves) is much faster than hormonal control (by catecholamines) in rabbit liver.
TL;DR: The enzyme is stable between pH 3 and 6 but is extremely labile above pH 7.1, and splits amylopectin completely by combined action with beta-amylase but does not attack pullulan.
Abstract: We have isolated a Pseudomonas sp. (strain SB15) which produces an isoamylase (EC 3.2.1.9). Highest yields of this enzyme were obtained when the bacterium was grown in shaken culture in a medium containing maltose, dextrin, starch, or isomaltose. Specific carbon and nitrogen sources were required for growth. The most satisfactory medium consisted of 2% maltose, 0.4% sodium glutamate, 0.3% diammonium hydrogen phosphate, and other inorganic salts. The optimal pH for enzyme production was 5 to 6. The enzyme is stable between pH 3 and 6 but is extremely labile above pH 7. It splits amylopectin completely by combined action with β-amylase but does not attack pullulan.
TL;DR: The fine structure of curdlan produced by Alcaligenes faecalis var. myxogenes 10C3, mutant K, and pachyman from Poria cocos were investigated, with regard to their gel-forming properties as discussed by the authors.
Abstract: The fine structure of curdlan produced by Alcaligenes faecalis var. myxogenes 10C3, mutant K, and pachyman from Poria cocos were investigated, with regard to their gel-forming properties. Periodate oxidation showed that both polysaccharides contain very high proportions of (1→3)-linked glucose residues. On complete hydrolysis the glucan polyalcohol obtained by periodate oxidation and borohydride reduction of curdlan (DP¯ 455) gave glucose and glycerol, in the molar ratio of 125~130: 1, and on mild acid hydrolysis yielded degraded polysaccharide (DP¯ 155), confirming the previous conclusion that curdlan has an essentially unbranched structure though it may contain a few internal (1→6)-glucosidic linkages. On complete hydrolysis the glucan polyalcohol derived from pachyman (DP¯ 255) gave glucose and glycerol, in the ratio of 40:1, and on mild hydrolysis it yielded degraded polysaccharide (DP¯ 130). This indicates that pachyman contains on the average four branch points and one internal (1→6)-glucosidic link...
TL;DR: It is concluded that the microsomal electron transport system involving cytochrome P-450 functions in ω-oxidation of fatty acids.
TL;DR: NADPH-sulfite reductase, catalyzing the reduction of sulfite to sulfide by NADPH, was purified from baker's yeast to an almost homogeneous state and showed an irreversible conversion to a reddish violet form.
TL;DR: By measurements of optical rotatory dispersion and circular dichroic spectra, it was confirmed that the appearance of the helical conformation commences at the tetramer, and when the number of residues is five or greater, the conformation of thehelical structure of poly‐L‐proline II seems to be completed.
Abstract: The results of the measurement of the far-ultraviolet absorption spectra of L-proline oligomers in water and acetonitrile are summarized as follows. The monomer has an absorption maximum at 182.5 mμ in acetonitrile. The absorption maximum of the dimer is found at 185 mμ and a shoulder appears around 200 mμ, that is, splitting of the absorption spectrum is observed in the dimer. As the degree of polymerization increases, the position of the shoulder shifts toward the wavelength of the absorption maximum of poly-L-proline II, with an accompanying increase in intensity. We may describe the absorption peak around 203 mμ of poly-L-proline II as identical with the shoulder with an increased intensity. By measurements of optical rotatory dispersion and circular dichroic spectra, it was also confirmed that the appearance of the helical conformation commences at the tetramer. When the number of residues is five or greater, the conformation of the helical structure of poly-L-proline II seems to be completed.
TL;DR: Clustering of all head genes and also of tail genes, as in phage λ, were demonstrated by the results of the prophage deletion mapping as well as the two-factor crosses performed among the sus mutants.
TL;DR: Evidence was presented that indole was oxidized to anthranilic acid in this bacterium with dihydroxyindole as the intermediate and the indole-grown cell was shown to oxidize skatole to (+)-2-oxo- 3-methyl-3-Hydroxyindoline.
TL;DR: Several types of tin(IV) N,N-dimethyldithiocarbamato complexes, Cl2Sn(SSCN Me2)2, Me2SnX (SSCN ME2) (X=Cl, Br, I) have been prepared.
TL;DR: In this article, the Mossbauer spectra in iron-carbon martensite was resolved into four components arising from the 1st, 2nd, (3, 4)th neighboring iron atoms for the carbon atoms and the remnant iron atoms.
Abstract: The Mossbauer spectra in iron-carbon martensite could be resolved into four components arising from the 1st, 2nd, (3, 4)th neighboring iron atoms for the carbon atoms and the remnant iron atoms. The carbon atoms were found to cause localized changes of electronic states of the surrounding iron atoms. The internal magnetic field, isomer shift and quadrupole splitting for the first neighbors largely deviated from those for pure iron, i.e. , 265±2 KOe, -0.03±0.05 mm/sec and 0.13±0.05 mm/sec, respectively, suggesting the covalent admixture between the iron and carbon atoms. The internal fields and isomer shifts for the 2nd and (3, 4)th neighbors also deviated slightly from those of pure iron, but with the sign opposite to those for the 1st neighbors. The quadrupole splittings for them were nearly zero, which mean that the positive charge of a carbon ion is almost screened out within a distance of the order of 2A.
TL;DR: The nucleocapsids of HVJ retain their full length and have a sedimentation constant S 20, w , of about 250S, but no detectable infectivity for eggs, as well as having one antigenic component, named S, in gel diffusion.
TL;DR: The soluble fraction serine hydroxymethylase was more anionic than the mitochondrial enzyme as evidenced by the affinity for DEAE-cellulose and electrophoretic mobility and the soluble enzyme showed a broad pH optimum centering at 7.4.
TL;DR: In this article, two forms of two forms were prepared for complexes of the type Ni(3-methoxysalicylideneiminato)nickel(II), where Y denotes a chlorophenyl or bromophenyl.