Banaras Hindu University

About: Banaras Hindu University is a education organization based out in Varanasi, Uttar Pradesh, India. It is known for research contribution in the topics: Population & Dielectric. The organization has 11858 authors who have published 23917 publications receiving 464677 citations. The organization is also known as: Kashi Hindu Vishvavidyalay & Benares Hindu University.

Inhibitive Effect of Argemone mexicana Plant Extract on Acid Corrosion of Mild Steel

Abstract: The effect of plant extract of Papaveraceae family Argemone mexicana is studied for use as a low cost and efficient corrosion inhibitor for mild steel in acidic environment. This plant extract is selected for the study of corrosion inhibition in view of its rich source of organic inhibiting molecules as proteins, amino acids, tannins, phenolic compounds, saponins, and flavonoids and nonalkaloids organic compounds such as fused benzene rings, hetero N atom rings, −OCH3, and −OH groups. A simple extraction method is adopted to obtain water-based plant extract. Argemone mexicana extract is for the first time used as an efficient inhibitor for mild steel in 1 M HCl. Weight loss and electrochemical methods are used to study the corrosion. Nearly 80% corrosion inhibition is observed at around 200 mg L–1 inhibitor concentration and maximum (92.5%) for 500 mg L–1 extract concentration in 1 M HCl. Inhibition mechanism is studied using UV–vis, electrochemical, and surface imaging techniques.

Floating microspheres of cimetidine: formulation, characterization and in vitro evaluation.

Abstract: Floating Drug Delivery Systems (FDDS) or Hydrodynamically Balanced Systems(HBS) are among the several approaches that have been developed in order to increasethe gastric residence time (GRT) of dosage forms (1–3). Both single and multiple unitsystems have been developed. The single-unit floating systems are more popular buthave a disadvantage owing to their ’all-or-nothing’ emptying process leading to highvariability of the gastrointestinal transit time (4, 5). Still, the multiple-unit dosage formsmay be better suited because they are claimed to reduce the intersubject variability inabsorption and lower the probability of dose dumping (6). Such a dosage form can bedistributed widely throughout the gastrointestinal tract (GIT), affording the possibilityof a longer lasting and more reliable release of the drug from the dosage form (7).

Removal of victoria blue from aqueous solution by fly ash

Abstract: The use of fly ash for the removal of victoria blue (C126, 44045) from aqueous solution at different concentrations and pH has been investigated. The process follows first order adsorption rate expression and the rate constant was found to be 1.70 × 10−2 min−1 at a victoria blue concentration of 1.0 × 10−4 M and 25°C. The uptake of victoria blue by fly ash is diffusion controlled and the value of mass transfer coefficient is 1.25 × 10−5 cm sec−1. The equilibrium data fit well in the Langmuir model of adsorption. Maximum removal was noted at pH 8.0. Low desorption of dye from adsorbent surface indicates that the process may not be essentially a reversible one.

Shared and Unique Components of Human Population Structure and Genome-Wide Signals of Positive Selection in South Asia

Abstract: South Asia harbors one of the highest levels genetic diversity in Eurasia, which could be interpreted as a result of its long-term large effective population size and of admixture during its complex demographic history. In contrast to Pakistani populations, populations of Indian origin have been underrepresented in previous genomic scans of positive selection and population structure. Here we report data for more than 600,000 SNP markers genotyped in 142 samples from 30 ethnic groups in India. Combining our results with other available genome-wide data, we show that Indian populations are characterized by two major ancestry components, one of which is spread at comparable frequency and haplotype diversity in populations of South and West Asia and the Caucasus. The second component is more restricted to South Asia and accounts for more than 50% of the ancestry in Indian populations. Haplotype diversity associated with these South Asian ancestry components is significantly higher than that of the components dominating the West Eurasian ancestry palette. Modeling of the observed haplotype diversities suggests that both Indian ancestry components are older than the purported Indo-Aryan invasion 3,500 YBP. Consistent with the results of pairwise genetic distances among world regions, Indians share more ancestry signals with West than with East Eurasians. However, compared to Pakistani populations, a higher proportion of their genes show regionally specific signals of high haplotype homozygosity. Among such candidates of positive selection in India are MSTN and DOK5, both of which have potential implications in lipid metabolism and the etiology of type 2 diabetes.