A series of metal-modified phosphotungstates were prepared and performed for direct synthesis of ethyl levulinate from fructose in ethanol. Considering the cost of catalysts, catalytic activity of catalysts, and easy separation of catalysts together, K-HPW-1 was chosen as the most suitable catalyst for synthesis of ethyl levulinate from fructose. A high ethyl levulinate yield of 64.6 mol% was o...

Three new dedicated experiments searching for proton decay came on the a i r during the last year or so. Orders of magnitude more neutrino events, as well as possible nucleon decay candidates, have been recorded. Significant new l imits have been placed on many modes of nucleon decay. Representative lower l imits at 90% C.L. for the lifetime/branching ratio for p§ ~ of 2.0x1032 years, p§ ~ of 3...

Porous solids with organized multiple porosity are of scientific and technological importance for broadening the application range from traditional areas of catalysis and adsorption/separation to drug release and biomedical imaging. Synthesis of crystalline porous materials offering a network of uniform micro- and mesopores remains a major scientific challenge. One strategy is based on variatio...

A numerical analysis of a hybrid plasmonic waveguide (HPW) for deep subwavelength optical confinement and long-range propagation with low loss is presented here. Two types material platforms, namely, Si/SiO2/Au GaAs/SiO2/Ag, were analyzed to optimize the HP waveguide. The mode character, an important crucial design parameter waveguides, was calculated based on coupled theory, providing coupling...

Serum uric acid (SUA) and ascorbic acid levels were evaluated in 40 patients preclampsia [18-diabetic pre-eclamptic women (DM-PRW) & 22 without diabetes (PRW)]; 20 normotensive pregnant women [8 with gestational diabetes (G-DM) & rest 12 were healthy pregnant women (HPW)]; and control group consisting of 20 healthy non-pregnant women. SUA values were significantly increased in PRW & DM-PRW as c...

The allelopathic influence of plant residues of three dominant weeds of NorthWestern Himalayan region, namely, Eupatorium adenophorum, Ageratum conyzoides and Lantana camara was observed on the germination and early growth of three common cereal crops viz., Triticum aestivum cv. HPW-42, Oryza sativa cv. Hasanshrai Basmati and Zea mays cv. Girija. The effect of soil amended with weed residues at...