Redressing racial inequities through water law in South Africa: revisiting old contradictions? Draft

Water lawCatchment areasRiver basinsSocial aspectsPovertyInstitutional development

Research Notes: Induced floral abnonnality in soybean

One of the M3 progenies of Type-49 soybean irradiated with 15 kr gamma rays showed segregation for plants with abnormal flowers. The progeny consisted of 30 normal plants and 8 mutant plants, indicating a monogenic inheritance. The mutant plants set only a few pods and appeared almost sterile at maturity

Research notes: Additional sterile and male sterile mutants in soybean

In the M2 populations of different soybean varieties irradiated with gamma rays, a total of seven lines showed segregation for sterility at maturity. The detailed genetic and cytogenetic studies of these lines were conducted in M3 and M4 populations derived from fertile segregates of the M2 progenies. Four of these were found to be both male and female sterile, whereas, three of these showed female fertility but male sterility as indicated below (Table 1)

Dvostruka ionizacija bakra udarom elektrona

Electron-impact double ionization of copper has been investigated in the modified double-binary-encounter model. For the first time, Hartree-Fock velocity distribution has been used while considering ejection of both electrons from the target in binary-encounter calculations. Contribution of Auger emission, which is considered to be dominant at high impact energies, is also included in the calculations. The present results have been compared with the recent experimental measurement of Bolorizadeh et al. and semi-empirical calculations of Belenger et al. The semi-empirical calculations are found to overestimate the cross-sections. The present results are in satisfactory agreement with the experimental observations.Istražili smo dvostruku ionizaciju bakra udarom elektrona u izmijenjenom modelu dvojnih binarnih sudara. Prvi se puta u razmatranjima izbacivanja dvaju elektrona iz mete u binarnim sudarima primjenjuje Hartree-Fockova raspodjela brzina. Doprinos Augerove emisije, koji dominira na višim udarnim energijama, također smo uključili u račun. Dobiveni se ishodi računa uspoređuju s nedavnim mjerenjima Bolorizadeha i sur. i poluempirijskim računima Belengera i sur. Nalazimo da poluempirijski računi precjenjuju udarne presjeke. Naši su ishodi računa u dobrom skladu s eksperimentalnim vrijednostima

Residual life estimation of high temperature tubings based on oxide scale thickness measurement

Super heater and Reheater tubes offossil boilers, wherein creep is the major damage mechanism, are required to be assessed periodically (after one lakh hours) for remaining life. For remaining life estimation of these tubes, knowledge of the operating tube metal temperature forms a very valuable input. Unfortunately , this information is hard to get, since measurement of tube temperature directly or indirectly through the measurement of steam temperature, are carried out only infrequently due to various technical and economic considerations. It is more convenient to estimate the operating tube metal temperature in service by examination of tube samples for thickness ofsteam side oxide scale, hardness and deterioration of microstructure. Since the changes in these parameters are fitnctions of time and temperature their currentvalues may be used to estimate average tube thermal history, for a given operating time. This paper deals with relatively accurate estimations of tube metal temperature using three approaches viz.(i) Microsstructural evoluation (ii) Steam side oxide scale thickness built tip and (iii) Hardness degradation. One time estimate of temperature and stress values have been extrapolated back to the initial conditions using linear growth of steam side scale thickness andf re side wastage of the tube. Total service life has been discretized at a smaller interval to increase the accuracy of estimation. Typical results on remaining life calculation based on above ntodification have been described

Magnetization and Magneto-resistance in Y(Ba1-xSrx)2Cu3O7-{\delta} (x = 0.00 - 0.50) superconductor

Here we present the magnetic properties and upper critical field (BC2) of polycrystalline Y(Ba1-xSrx)2Cu3O7-{\delta} superconductors, which are being determined through detailed ac/dc susceptibility and resistivity under magnetic field (RTH) study. All the samples are synthesized through solid state reaction route. Reduction in Meissner fraction (the ratio of field cooled to zero field cooled magnetization) is observed with increasing Sr content, suggesting occurrence of flux pining in the doped samples. The ac susceptibility and resistivity measurements reveal improved grain couplings in Sr substituted samples. Consequently the inter-grain critical current density (Jc), upturn curvature near the Tc in temperature dependence of upper critical field [BC2(T)], and BC2 are enhanced. Both Jc and BC2 increase in lower Sr substitution (up to x = 0.10) samples followed by decrease in higher doping due to degradation in effective pining and grain coupling.Comment: 17 pages text + Figs, [email protected]

Constraints on nuclear matter parameters of an Effective Chiral Model

Within an effective non-linear chiral model, we evaluate nuclear matter parameters exploiting the uncertainties in the nuclear saturation properties. The model is sternly constrained with minimal free parameters, which display the interlink between nuclear incompressibility ($K$), the nucleon effective mass ($m^{\star}$), the pion decay constant ($f_{\pi}$) and the $\sigma-$meson mass ($m_{\sigma}$). The best fit among the various parameter set is then extracted and employed to study the resulting Equation of state (EOS). Further, we also discuss the consequences of imposing constraints on nuclear EOS from Heavy-Ion collision and other phenomenological model predictions.Comment: 10 pages, 8 figure