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Rāver, India

Brahma J.,Science College | Brahma B.K.,Bodoland University
International Journal of Conservation Science

Throughout history, natural products from plants have played sustaining roles in the lives of humans, especially for food sources and for medicinal products. Oral interviews with local and village elders have enumerated 50 species of economically important wild aromatic plants used as vegetables, spices, condiments and medicines for curing different ailments. Of these six aromatic plants were analyzed to evaluate nutritional and bioactive compounds. The results revealed that it contains moisture content in the range of 66-87% of fresh weight, ash content 20-43% of dry weight, crude protein in 12-25% of dry weight, total solids in 13-34% of dry weight, carbohydrates in a range of 7-42% of dry weight and crude fat in 0.68-2.0% of dry weight. Qualitative phytochemical analysis of these plants confirms the presence of bioactive compounds like steroids, alkaloids, flavonoids, tannins, saponins and trace amounts of micro nutrient elements. Thus, preliminary study and qualitative analysis draws attention on the signifance of these phytochemicals with respect to the role of wild plants in traditional medicinal system and the need for further studies in treatment of many diseases. Source

Gawande S.,Science College | Thakare S.R.,Government Institute of Science

Herein we report on the synthesis of a ternary polymer composite of graphene, carbon nitride, and poly(3-hexylthiophene) (G-g-C 3N 4-P 3HT) by a solvothermal method. The prepared polymer composite catalysts are characterized by TEM, XRD, FTIR spectroscopy, and photoluminescence techniques for their morphology, structure and photocatalytic efficiency. Graphene-loaded polymer composites of carbon nitride (g-C 3N 4) and poly(3-hexylthiophene) act as efficient photocatalysts for waste water treatment. Methylene blue is used as the model pollutant and the rate of its photocatalytic degradation with G-g-C 3N 4-P 3HT is three times higher than that achieved with a g-C 3N 4-P 3HT composite. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

Histomorphological study of the larval (final instar) osmeterium gland in Graphium agamemnon agamemnon Linnaeus shows that each fully protruded Y-shaped osmeterium is composed of 2 elongated hollow tubular arms, which arise from a basal peduncle. The surface of the osmeterium has irregular folds, and papillae arise from some cells. There is an oval opening (gland pore, structurally less complicated than in other evolved species) in the proximal second seventh of the segment on each tubular arm on its posterior face. Histologically, 2 main types of secretory cells can be observed (excluding the muscle fiber cells and supporting cells): i) ellipsoid gland cells within the gland pore region and ii) tubular arm cells extending from the upper part of the ovoid gland pore region to the distal part of the tubular arms. The defensive efficacy of the osmeterial secretion in larvae was also examined, both in the laboratory and field, and was observed to be very complicated. © TÜBİTAK. Source

Thakare S.R.,Science College | Karade N.N.,Rashtrasant Tukadoji Maharaj Nagpur University
Journal of Molecular Catalysis A: Chemical

Well faceted CuO nanoparticles were synthesized by thermal-assisted green strategy at reflux temperature in a short period of time. A possible growth mechanism of such highly faceted nanostructures based on typical biomolecule-crystal interactions in aqueous solution is tentatively proposed. The large surface area (223.36 m 2/g) and rich exposed active sites are expected to endow such nanostructures with excellent performances in catalysis as demonstrated here for remarkable catalytic activity with respect to the N-arylation of indoles. Nanoparticles were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Both the activity and selectivity of the N-arylation reactions could be tuned by varying the concentration of CuO nanoparticles. Nanoparticles catalyst were recycled and reused for further catalytic reactions with minimal loss in activity. A variety of indole derivatives afforded corresponding N-arylation product with excellent yields (up to 98%). © 2012 Elsevier B.V. All rights reserved. Source

Thakare S.R.,Science College | Wankhade A.V.,Visvesvaraya National Institute of Technology
Catalysis Communications

A novel visible light driven photocatalyst of Ag2ZrO3 was prepared by solid-state reaction technique for the first time and the photocatalytic properties were investigated. Reactive powder of the photocatalyst was obtained by heating a 1:2 molar mixture of zirconyl oxychloride and silver nitrate at 900 °C up to 24 h and characterized by XRD, SEM, TEM, EDAX, and UV-visible diffuse reflectance spectroscopy. The photocatalytic degradation of aqueous methylene blue dye with Ag2ZrO3 as catalyst was investigated under visible light irradiation. The photocatalyst is superior over the known photocatalyst and has high stability and reusability. © 2014 Elsevier B.V. All rights reserved. Source

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