Showing papers by "Nankai University published in 1983"
TL;DR: Diffusates from the hypocotyl and leaves of sunflower seedlings (Helianthus annuusL. cv. Mammoth) contain both auxin and inhibitor(s) of auxin-induced growth, which promotes auxin synthesis in leaves and promotes synthesis of the inhibitor.
Abstract: Diffusates from the hypocotyl and leaves of sunflower seedlings (Helianthus annuusL. cv. Mammoth) contain both auxin and inhibitor(s) of auxin-induced growth. The auxin activity has been evaluated with the conventional Avena coleoptile bioassay employing negative curvature, The inhibitor activity has been determined with a newly developed bioassay, measuring the positive curvature response of the Avena coleoptile. This bioassay has been standardized by the response to 2,3,5-triiodo-benzoic acid. Diffusates from plants in darkness have higher auxin activity and lower inhibitor activity than diffusates from plants in light. Irradiation at 730 nm promotes auxin synthesis in leaves, and! irradiation at 660 nm promotes synthesis of the inhibitor.
18 citations
TL;DR: In heavily-doped polar semiconductors, the polar vibrations of the crystal lattice affect their plasma frequency, thus, when calculating the carrier concentration from the plasma reflection edge, some correction to the results is necessary.
4 citations
2 citations
TL;DR: In this article, the temperature distribution in the fluid in a floated gyroscope is described by a Dirichlet-Neumann mixed boundary value problem of 2nd order linear elliptic equations.
1 citations
1 citations
TL;DR: In this paper, the wave equations for the channelling relativistic electron and positron have been solved by WKB method and a quantum condition is readily provided to determine the energy levels.
Abstract: The trajectory equations for both relativistic and nonrelativistic channelling particles become very simple under the general channelling conditions. For many potentials, such as Lindhard potential, the expressions of the trajectories can be obtained in closed form. The complete trajectory in the crystal can be traced out easily in both transverse and longitudinal directions. The backscattering probability as a function of the incident angles has been derived in this trajectory picture and is calculated for several cases: 3 Mev proton on Si(110), 1 Mev proton on Au(111), 1.5 Mev electron on Si(110) and 1 Mev electron on Ag(111). The shapes and widths of these theoretical curves fit well with the experimental results. The wave equations for the channelling relativistic electron and positron have been solved by WKB method. In this method potential with any complex functional form can be used and a quantum condition is readily provided to determine the energy levels. Taking a simulated. Moliere potential, the planar channelling radiation spectra of electrons have been calculated for a number of cases. The locations of the peaks obtained agree well with the experiments. A multiplicity of the radiation spectrum for the relativistic positron is predicted and an explanation is given for the single peak observation. More accurate wave functions for the channelling particles have been derived by perturbation theory. Transition matrix, energy level life time and the ratios of the intensities of transitions from different quantum states of electron and positron channelling radiations are estimated.
TL;DR: In this paper, the sensitization of micelle color reactions of germanium with eight 9-substituted-2, 3, 7-trihydroxyfluorones (methyl, phenyl, p-bromophenyl), p-dimethylaminophenyl, m-nitrophenyl, o-nitrogen-fluorone, salicyl and β-hydroxynaphthyl) in the presence of cationic surfactant CTMAB have been investigated.
Abstract: In this paper the sensitization of micelle colour reactions of germanium with eight 9-substituted-2, 3, 7-trihydroxyfluorones(methyl, phenyl, p-bromophenyl, p-dimethylaminophenyl, m-nitrophenyl, o-nitrophenyl, salicyl and β-hydroxynaphthyl) in the presence of cationic surfactant CTMAB have been investigated. It is found that in a strong acid medium all these reagents give colour reactions with germanium ions and CTMAB, the most sensitive ones are salicyl-and o-nitrophenyl-fluorone.on the base of comparing and screening properties of reagents the conditions of determining germanium by means of the ternary complex Ge-o-nitrophenylfluorone-CTMAB have been studied. The molar ratio of the components in the complexes is estimated and the possible reaction mechanism of sensitization of micelle is proposed.A new method has been developed for the rapid determination of micro amounts of germanium in lead-zinc ores without its separation from accompanying elements with satisfactory results.