Neutrino Mixing Predictions of a Minimal SO(10) Model with Suppressed Proton Decay

During the past year, a minimal renormalizable supersymmetric SO(10) model has been proposed with the following properties: it predicts a naturally stable dark matter and neutrino mixing angles theta_atm and theta_13 while at the same time accommodating CKM CP violation among quarks with no SUSY CP problem. Suppression of proton decay for all allowed values of tan beta strongly restricts the flavor structure of the model making it predictive for other processes as well. We discuss the following predictions of the model in this paper, e.g. down-type quark masses, and neutrino oscillation parameters, U_e3, delta_MNSP, which will be tested by long baseline experiments such as T2K and subsequent experiments using the neutrino beam from JPARC. We also calculate lepton flavor violation and the lepton asymmetry of the Universe in this model.Comment: 22 pages, 11 figure

Electroflotation-A critical review

Problems related to processing of fine particles and separation of minerals by electro-flotation was described

Studies on ammoniacal leaching of copper oxide minerals

Aqueous ammoniacal leaching of an oxidized copper ore from the mines of M/s Hindustan Copper Limited : Malanjkhand are reported. Factors which influence copper recovery such as ammonia concentration, solid-liquid ratio, particle size and agitation have been studied at ambient temperature. Over 90% copper extraction could be achieved at 1.5 mo1ar concentration of ammonia, 10% solids and at a stirring speed of 550 Min- . A kinetic study of the process indicated a mixed control reaction mechanism. The copper ammine solution obtained in the leaching step was subjected to precipitation by stripping of the ammonia at different temperatures and air flow rates. The kinetic treatment of the data obtained on preci[litation process revealed that the decomposition reaction is controlled by chemical reaction control. The precipitated product analysed 75% Cu with a recovery of 80-85% copper

Beneficiation of Low Grade Ores by Electro-Column Flotation Technique.

Three types of flotation columns were developed with a column dia of 8.0 cm and a length of 160 cm. The first type consists of an ordinary column fitted with a porous plate at the bottom. The second type consists of two electrodes at the bottom to obtain very fine and uniform bubbles generated electrolytically and the third is a combination of first and second types, i.e. to get both electrolytic bubbles and air from the compressor through porous plate. Three different ores were tested-gold tailings for recovery of scheelite, copper tailings (chalcopyrite) and oxide copper ore. In the case of scheelite and copper oxides, good results were obtained with the first type of column itself, whereas the third type column was found fairly effective in the recovery of chalcopyrite. The variables like the effect of reagent concentration, column height above the feed point, feed flow ra te, current density, air flow rate, particle size were examined

Separation of minerals by electroflotation

Bench scale experiments were conducted to study the separation of chalcopyrite fines. Three different electroflotation cells were designed and beneficiation response of chalcopyrite was investigated.Electrolytic oxygen bubbles were found to have significant influence on the beneficiation of chalcoyrite.High enrichment ratio of chalcopyrite was observed by column cum electroflotation method using diethyldithiocarbamate as collector

Studies on the beneficiation of copper oxide minerals

Bench scale experiments on the beneficiation of copper oxides were conducted using different chelating agents, viz. Cupferron, 8-Hydroxyquinoline, a-Benzoin oxime and sodiumdiethyldithiocarbamate. Among the four collectors tried, diethyldithiocarbamate was found to be effective in achieving good recovery and grade. Also the consumption of the reagent was less compared to other collectors. All the collectors have exhibited excellent selectivity towards copper and fairly good concentrate was obtained. Adsorption studies revealed that the adsorption of the collector on the mineral surface follows a true chemical reaction. Investigation on the nature of complexation with diethyldithiocarbamate has indicated that each copper atom on the surface will be complexed with two diethyldithiocarbamate molecules. Variables like reagent concentration, pH of the pulp, impeller speed, etc. were studied

Flocculation of iron ores using magnafloc polymers

Flocculation of iron ore fines using two different anionic polymers based on polyacrylamide.The results obtained were presented

Zeta potential and flocculation behavior on iron ore fines using magnafloc polymers.

The flocculation behavior of iron ore fines using Magnafloc polymers as flocculants was studied along with zetapotential measurements.Correlation between zetapotential data and flocculation was examined and discussed.The mechanism of flocculant adsorption on mineral surface was suggested

Where constructionism and critical realism converge: interrogating the domain of epistemological relativism

The paper interrogates the status, nature and significance of epistemological relativism as a key element of constructionism and critical realism. It finds that epistemological relativism is espoused by authorities in critical realism and marginalized or displaced in the field of management and organization studies, resulting in forms of analysis that are empirically, but not fully critically, realist. This evaluation prompts reflection on the question of whether, how and with what implications epistemological relativism might be recast at the heart of critical realist studies of management and organization

3-(1,2-Di-p-tolyl­vin­yl)-2-methyl-1H-indole

In the title compound, C25H23N, the indole unit makes a dihedral angles of 79.03 (5) and 61.82 (4)° with the benzene rings. No classical hydrogen bonds are found in the crystal structure