Showing papers by "Nankai University published in 1984"
TL;DR: A 1:1 complex of mercuric chloride with D-peniccillamine has been isolated and characterised as 2[(μ3-Cl){HgSC(CH3)2CH(NH3)COO}3]·3(μ2-Cl)·2(H3O)·(H2O·Cl)3].
14 citations
13 citations
TL;DR: The effect of the application of an incremental method is the approximation of the three-dimensional nonlinear equations of finite elasticity by a sequence of linear problems as mentioned in this paper, and sufficient conditions which guarantee the convergence of such a method are given here.
Abstract: The effect of the application of an incremental method is the approximation of the three-dimensional nonlinear equations of finite elasticity by a sequence of linear problems. We give here sufficient conditions which guarantee the convergence of such a method.
10 citations
TL;DR: This paper discusses the problem of diffraction tomography, when a general bean wave is used as the excitation and the three-dimensional structure of the object is considered, and shows that in this case a reconstruction algorithm identical to the two-dimensional geometry yields a z-averaged tomogram of the inhomogeneity.
9 citations
TL;DR: Four species are recognized in the perplexing vinctus‐gvoup (viz capicola, reductus, vincts and guttus) based on the genitalia details and external features in the rhyparochromine lygaeid genus Pseudopachybrachius.
Abstract: . The rhyparochromine lygaeid genus Pseudopachybrachius is revised. Four species are recognized in the perplexing vinctus-gvoup (viz capicola, reductus, vinctus and guttus) based on the genitalia details and external features. One new species, P.concepcioni sp.nov., is described from the West Indies and South America. New distributional records are given for all species. Pamera dubia Reuter 1882 is synonymized with Pseudopachybrachius reductus (Walker, 1872) and a neotype is designated for Rhyparochromus inconspicuus Dallas, 1852. A key and diagnostic characters of seven species are given. Phylogenetic and zoogeographic relationships are discussed. Illustrations of the genitalia, a cladogram and diagnostic external features are included.
7 citations
TL;DR: In this paper, thermal power data for amorphous Si(Ga) alloys from 210 to 450 K were reported together with complementary optical absorption and electrical conductivity data, and patterns in behaviour were compared to those found previously for ammorphous Si (Al).
Abstract: Thermopower data for amorphous Si(Ga) alloys from 210 to 450 K are reported together with complementary optical absorption and electrical conductivity data. Patterns in behaviour are compared to those found previously for amorphous Si(Al). Preliminary data for amorphous Si(In) are also presented.
7 citations
TL;DR: This paper shows that a complete balanced Howell rotation exists for 16k + 12 partnerships if 8k + 5 is a prime power and the method is to construct skew balanced starters using cyclotomy theory.
5 citations
TL;DR: In this paper, the authors extended these results to vector boundary value problems, under analogous stability conditions on the solutionu=u(t) of the reduced equationO=h(t,u).
Abstract: Some authors employed the method and technique of differential inequalities to obtain fairly general results concerning the existence and asymptotic behavior, as ɛ→∩+, of the solutions of scalar boundary value problems
$$\varepsilon u'' = h(t, y), a< t< b, y(a, \varepsilon ) = A, y(b, \varepsilon ) = B$$
, In this paper, we extend these results to vector boundary value problems, under analogous stability conditions on the solutionu=u(t) of the reduced equationO=h(t,u). Two types of asymptotic behavior are studied, depending on whether the reduced solutionu(t) has or does not have a continuous first derivative in (a, b) leading to the phenomena of boundary and angular layers.
4 citations
TL;DR: In this article, the infrared reflection spectra of Tris-sarcosine calcium chloride-bromide and the Raman spectra have been obtained for T < Tc in the polarization E//Y or y, z(yy)y, z.
Abstract: The infrared reflection spectra of Tris-sarcosine calcium chloride-bromide and the Raman spectra have been obtained for T < Tc in the polarization E//Y or y, z(yy)y, z. One nonpolar Raman active and two weakly polar infrared active soft modes have been observed. These soft modes are interpreted by the coupling of low lying optical modes with a fast relaxator in a phase transition of prevalent order-disorder type.
2 citations
1 citations
TL;DR: In this paper, the dependence on the masses and spins of the instanton induced potential between a pair of light quarks in baryons is derived, and the magnitudes of the parametersb and α are also estimated.
Abstract: On the basis of current assumptions of instanton theory we derive strictly the explicit dependence on the masses and spins of the instanton induced potential between a pair of light quarks in baryons, namelyV12=γ+β(m*1+α)(m*2+α)η(1-σ1ησ1), wheremi* andσi(i=1.2) are respectively the mass and Pauli spin of theith quark. On the additional basis of the MIT bag model, we obtain γ=c/R3 and β=b/R3>0, and α>0 is independent of the radiusR of the baryon. The magnitudes of the parametersb and α are also estimated. The MIT bag model is improved by taking into account this potential. Isomultiplet mass splitting formulas are derived in good agreement with experiment.
01 Jan 1984
TL;DR: In this paper, the robust control problem of linear multivariable systems has been examined, and the necessary and sufficient conditions for the system to have a robust controller and for a compensator to be robust controller have been obtained.
Abstract: This paper has examined the robust control problem of linear multivariable systemsT_p (s) = P~(-1)(s) R(s) which have parameters. The necessary and sufficient conditions for thesystem to have a robust controller and for a compensator to be a robust controller have beenobtained. These new results are more generalized than previous works, and a rather simpleproof of main theorem of [3] has been given.
TL;DR: In this article, the authors reported the results of a study in the diffusion length of holes in α-Si:H by surface photovoltage using a metal Schottky barrier.
Abstract: The present paper reports the results of a study in the diffusion length of holes in α-Si:H by surface photovoltage using a metal (Ni) Schottky barrier. The change of field-assisted hole transport with bias light was observed. It is believed that measurement of the diffusion length by this method may become a useful way of evaluating and improving the quality of α-Si:H.
TL;DR: In this paper, the formation constants (log K) of ternary mixed ligand complex formed from 1,10-phenanthroline (A, phen) and N-(p-substituted phenyl) glycines were determined by pH method at 25°C in 30% (V/V) ethanol solution in presence of 0.1 M NaClO4.
Abstract: The formation constants (log K) of ternary mixed ligand complex formed from 1,10-phenanthroline (A, phen) and N-(p-substituted phenyl) glycines,R
NHCH2COOH (B, pRPhG, CH3, H, CL), with copper (II), nickel (II), cobalt (II) and zinc (II) were determined by pH method at 25°C in 30% (V/V) ethanol solution in presence of 0.1 M NaClO4. It was found that linear free energy relationships exist between the stability of M(II)-phen-p-RPhG ternary complex and the base strengths of the ligands p-RPhG, conforming to the equation log K = α pKB +C. The factors influencing the stability of the ternary complex have been discussed. The enhancement of stability of ternary complex was explained in terms of formation of π back bonding between metal ion and the ligand phen. In contrast to the binary system, the ternary ni (II) and zn (II) complexes showed higher stability which could be accounted for by the formation of π back bonding and by intramolecular ligand-ligand interaction, possibly aromatic-ring stacking.
TL;DR: In this paper, the rotational isomers of O, O-diethyl phosphorodithioic acid have been studied both at and below room temperature and the results show that the vibrations of P=S, P(-O)2, P-S and S-H groups give multiple bands and the relative intensities of these bands vary as the temperature of the sample changes.
Abstract: Infrared and Raman spectra of O, O-diethyl phosphorodithioic acid have been studied both at and below room temperature. The results show that the vibrations of P=S, P(-O)2, P-S and S-H groups give multiple bands and the relative intensities of these bands vary as the temperature of the sample changes. According to the experimental results, we suggest that there are four rotational isomers of O, O-diethyl phosphorodithioic acid. Reasons for splitting the vibrational bands of these groups are also discussed.
TL;DR: In this paper, a new method of measuring the FIR properties of plastic film samples based on the Fabry-Perot resonator principle is presented, which possesses very high measuring precision.
TL;DR: In this paper, the effects of different surfactants on Hf-quercetin, ZrquercETin, Sn-morin, Mg-oxine-5-sulfonic acid (H_2QS), Zn-H_ 2QS, Cd-H-2QLS and Tb-EDTA-Sulfosalicylic acid (SSA) systems were investigated, and it was found that fluorescence intensity of each complex studied is increased greatly in the presence of a suitable surfactant.
Abstract: The effects of different surfactants on Hf-quercetin, Zr-quercetin, Sn-morin, Mg-oxine-5-sulfonic acid (H_2QS), Zn-H_2QS, Cd-H_2QS and Tb-EDTA-sulfosalicylic acid (SSA) systems were investigated. It was found that the fluorescence intensity of each complex studied is increased greatly in the presence of a suitable surfactant. The optimum conditions of formation of the ternary complexes involving a surfactant were found, and the compositions of these ternary complexes were established by fluorometry. In the presence or absence of a surfactant, the quantum efficiencies (φ) of fluorescent complexes were measured by relative method, and their molar absorptivities at the excitation wavelength (e_(ex)) wore calculated. It was found that the quantum efficiencies and molar absorptivities of fluorescent complexes were increased to various degrees due to the formation of the ionic associated complexes with fixed composition, and their fluorescence intensity was increased greatly thereby. The function of surfactant micellar and the relation between the molecular structures of surfactants and their effects on the fluorescent reactions were discussed. It is noted that only by the surfactants in the molecule of which the aromatic system is not charged or connected directly with a charged functional group can the fluorescent reactions be sensitized. With the sensitization of surfactant it is possible to develop some fluorometries of metals which are highly sensitive.
TL;DR: In this article, the stereoisomers (3 and 4) of O-ethyl O-phenyl O-(1-methyl-2-ethoxycarbonyl) vinyl phosphorothionate have been synthesized by the reaction of optically active O-methyl Ophenyl PHCLide 2 with ethyl acetoacetate under different conditions.
Abstract: The stereoisomers (3 and 4) of O-ethyl O-phenyl O-(1-methyl-2-ethoxycarbonyl) vinyl phosphorothionate have been synthesized by the reaction of optically active O-ethyl O-phenyl phosphorothiochloride 2 with ethyl acetoacetate under different conditions. 3 (100% Z-isomer, determined by 1H NMR) was synthesized by the reaction of 2 with ethyl sodio-acetoacetate in the mixed solvent of 1:3 toluene-dioxane at 50°C. 4 (>95% E-isomer) was obtained by the reaction of 2 with ethyl acetoacetate in presence of t-BuOK in DMSO at 15°C. 100% E-isomer 4 was separated from crude 4(>95% E-isomer) by column chromatography on silica gel (petroleum ether-ether 6:1). By this reaction either Z- or E-isomers were formed with inversion of the configuration at phosphorus atom. Thus, six stereoisomers of 3 and 4 which were prepared from 2 (RS, S, R) by the above method namely (RS)-Z, (R)-Z, (S)-Z and (RS)-E, (R)-E, (S)-E.