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  • Author or Editor: R. Sharma x
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A study was undertaken at the Directorate of Wheat Research experimental station, Karnal, India, to evaluate the effect of nitrogen (30, 60 and 90 kg/ha) and irrigation (one, two and three) on yield and grain quality traits of two and six row type malt barley genotypes. The mean grain yield significantly increased from 41.9 to 45.8 q/ha with increase in nitrogen dose from 30 to 90 kg/ha and 41.8 to 45.9 q/ha with increase in irrigations from one to three. The two and six row barleys had almost similar yield potential at higher nitrogen application and irrigation frequency but the six-row type had advantage at lower nitrogen and irrigation. Varietal effects were significant for all the traits, while N significantly affected only grain yield, spikes per unit area, 1000-grain weight and husk content. Irrigation effects were significant for bulk density, grain yield, spikes per unit area, and grains per spike. Traits like grain bulk density, proportion of bold and thin grains and husk content are mainly affected by variety and less affected by management practices.

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Abstract  

The retention and yields after neutron irradiation under standard conditions by ionizing radiation have been studied as a function of the mole fraction of nitrate in NaIO3–NaNO3 mixed-crystals. The effect of nitrate ion on the retention in solid-solution after irradiation was observed. A probable mechanism is suggested.

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A simple, rapid reversed-phase high-performance liquid chromatographic method has been developed and validated for simultaneous estimation of drotaverine and omeprazole in a tablet dosage form. A C18 column was used with a 60:40 (v/v) mixture of methanol and ammonium acetate (0.1 m, pH 5, adjusted with orthophosphoric acid) as mobile phase at a flow rate of 1.5 mL min−1. UV detection was performed at 319 nm. The method was validated for accuracy, precision, linearity, specificity and sensitivity in accordance with International Conference on Harmonisation guidelines. The method was successfully used for quantitative analysis of Ranipas-DV tablets. Total run time was 10 min, drotaverine and omeprazole were eluted with retention times of 7.969 and 6.538 min respectively. Validation revealed that the method is specific, accurate, precise, reliable and reproducible. Calibration plots were linear over the concentration ranges 5–40 μg mL−1 for drotaverine and 5–50 μg mL−1 for omeprazole, respectively. Limits of detection were 16.2 and 4.8 ng mL−1 and limits of quantification were 49.0 and 14.5 ng mL−1 for drotaverine and omeprazole, respectively. Recovery was in the range 100.66–100.94% and 102.42–102.89% for drotaverine and omeprazole, respectively, and the coefficient of variance was <2.0% for both. The high percentage recovery and low co-efficient of variation confirm the suitability of the method for simultaneous analysis of drotaverine and omeprazole in tablets.

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Abstract  

Based on solvent extraction and fractional precipitation methods, the retention in iodate and periodate targets were measured. Influence of temperature of irradiation in crystalline and solution phase have been observed. Higher retentions were observed in crystalline solids than in corresponding solution phase irradiation at room temperature. The role of physicochemical properties of the salts and the solvent is discussed.

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Abstract  

Dissolution effect on recoil128I retention in the form of IO 4 ion following /n,/ process in potassium periodate target has been studied. A remarkable variation in retention is found both in solid and solution phase with the pH of dissolution. A suitable mechanism is suggested to explain the observed results.

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Abstract  

The complexes of piperidine dithiocarbamate, 2-aminopyridine dithiocarbamate and organotin(IV) of the type R3Sn(L1), R2Sn(L1)2, R3Sn(L2), R2Sn(L2)2, [R=C6H5CH2 (benzyl), p-ClC6H4CH2 (p-chlorobenzyl), L 1=sodium piperidine dithiocarbamate and L 2=sodium 2-aminopyridine dithiocarbamate] have been synthesised and characterised by spectral studies (IR, UV, 1H NMR). Thermogravimetric (TG) and differential thermal analytical (DTA) studies have beeen carried out for these complexes and from the TG curves, the order and apparent activation energy for the thermal decomposition reactions have been elucidated. The various thermal studies have been correlated with some structural aspects of the complexes concerned. From DTA curves, the heat of reaction has been calculated.

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