Estimation of Uranium in Some Edible and Commercial Plants

The trace contents of uranium have been estimated in some edible and commercial plants by PTA method. The groups of food plants studied are cereals, pulses, underground vegetables, leafy vegetables, and fruit vegetables. The commercial plants and ingredients taken are betel leaves, tobacco leaves, areca nuts, and lime. Among the different samples studied, the average uranium content, in general, is found to vary from 0.25 to 2.67 pp

Effect of tissue glue versus suture in pterygium surgery in a tertiary care center of North-East India

Background: Pterygium is a triangular fibrovascular tissue of conjunctiva encroaching on to the cornea. Currently, conjunctival autograft technique after excision is reported as the most suitable and safest method. The autograft transplantation can be done either with the help of suture or tissue adhesives. Objective of the study was to evaluate the effects of tissue glue versus suture in limbal conjunctival autograft transplantation among the patients undergoing pterygium excision.Methods: A prospective study was carried out in a tertiary eye care hospital. 60 patients with primary pterygium underwent limbal conjunctival autograft transplantation. They were enrolled into two groups, group-A (tissue glue, N=30) and group-B (suture group, N=30). Operative time, postoperative patient comfort and recurrence of pterygium were assessed. The patients were followed-up for 6 months.Results: The mean surgical time in fibrin glue group (23.56±2.80) was significantly less compared to suture (30.78±2.20) group with p0.005).Conclusions: The use of fibrin glue for securing the limbal conjunctival autograft in pterygium surgery significantly reduces the operating time and postoperative discomfort

AlCl3,6H2O/KI/H2O/CH3CN : a new alternate system for dehydration of oximes and amides in hydrated media

Dehydration of oximes and amides to nitriles was carried out using the AlCl3â6H2O/KI/H2O/CH3CN system. It produced isoquinoline derivatives 8a-c (Bischler Naperialski reaction) when reacted with amides 7a-c in hydrated media. Also, the keto oximes produced anilides (Beckmann rearrangement) with the system under the same reaction conditions

Synthesis of 4-substituted-benzo[h]tetrazolo[1,5-a]-6,7-dihydroquinolines

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KF/Al2O3 mediated 1,3-dipolar cycloaddition of azomethine ylides: a novel and convenient procedure for the synthesis of highly substituted pyrrolidines

—The regio- and diastereoselective synthesis of pyrrolidine derivatives through 1,3-dipolar cycloaddition of an azomethine ylide and dipolarophile mediated by KF/Al 2O 3, a versatile solid supported reagent, is reported. KF/Al 2O 3 is sufficiently basic such thatitcandeprotonatea-iminoesterstogenerateazomethineylidesanditalsofunctionsasasolidsupportedcatalystleadingtothe cycloadduct rather than the Michael adduct. 2007 Elsevier Ltd. All rights reserved

Baker's Yeast-catalysed ring opening of benzofuroxans : an efficient green synthesis of aryl-1,2-diamines

A simple and inexpensive method for the reductive cleavage of N–O bond of benzofuroxans with bakers’ yeast under nonfermenting condition in aqueous media was achieved. The procedure gives excellent yields of aryl-1, 2-diamines

Indium(III) trifluoromethanesulfonate: An efficient reusable catalyst for the alkynylation-cyclization of 2-aminoaryl ketones and synthesis of 2,4-disubstituted quinolines

An environmentally friendly and highly efficient procedure for the preparation of 2,4-disubstituted quinoline derivatives has been developed by a simple alkynylation 13cyclization reaction of 2-aminoaryl ketones with phenylacetylenes in the presence of indium( III) trifluoromethanesulfonate In(OTf)3 under microwave irradiation and solvent-free conditions. This catalyst can be recovered after the reaction and reused efficiently in subsequent runs