The in vivO' efieet of some cations on the amouBt oflipoteiclioic acid (LTA) formed in plaque was investigated in two studies. In the Oral part five students followed six mouthriosing programs, each of which la.sted 4 d. Rinsing was performed for 1 min eveiy second hour with a test solution (0.05% stannous fluoride (SnFjj; 0.0.5% chlorhexidine gluconale; 0.3%, lanthanum chloride (LaCl,) and 0.0...

Micromethods for the determination of choline have been described by Beattie (1936) and Glick (1944). Both procedures involved the use of Reinecke salt as a precipitant, required 20150 pmoles of choline and depended on measurement of the pink colour of an acetone solution of the precipitate. More sensitive modifications of the reineckate method depend upon measurement of the chromium content of...

Introduction: The endemic occurrence of new strains of tuberculosis around the globe has initiated new research on developing diagnostic radiopharmaceutical based on antibiotics. Methods: Tc-99m labeled streptomycin was prepared using freshly milked TcO4 and various concentrations of streptomycin, stannous chloride at various temperatures in high yield radiochemical purity shown by HPLC/RTLC. R...

A method for the determination of total mercury in rat adipose tissue by cold vapour atomic fluorescence spectrometry (CVAFS) has been developed. Adipose samples were initially subjected to a lyophilization procedure in order to facilitate the homogenization and accurate weighing of small tissue aliquots (approximately 50 mg). A closed vessel microwave digestion procedure using a mixture of sul...

Incubation for a short time of arachidonic acid with the microsomal fraction of a homogenate of the vesicular gland of sheep in the presence of 1 mM p-mercuribenzoate followed by extraction and silicic acid chromatography yielded two prostaglandin endoperoxides. The structures of these compounds, i.e., 15-hydroperoxy-9alpha,11alpha-peroxidoprosta-5,13-dienoic acid (prostaglandin G(2)) and 15-hy...

Cancer cells acquire drug resistance via various mechanisms including enhanced cellular cytoprotective and antioxidant activities. Heme oxygenase-1 (HO-1) is a key enzyme exerting potent cytoprotection, cell proliferation and drug resistance. We aimed to investigate roles of HO-1 in human cholangiocarcinoma (CCA) cells for cytoprotection against chemotherapeutic agents. KKU-100 and KKU-M214 CCA...

A new method for the determination of ascorbic, dehydroascorbic and 2.3-diketogulonic acids in animal tissues, blood and urine is described. The material for analysis is homogenized in the presence of stannous chloride in trichloracetic acid and the extract is divided into three aliquots: in one part the ascorbic acid is converted into dehydroascorbic acid by oxidation with bromine water, in th...

India has a rich biodiversity and harbours a wealth of useful germplasm resources and there is no doubt that the plant kingdom is a treasure-house of diverse natural products. One such product from nature is the dye. Dyes are one of the most important uses of the plants. Recently, interest in the use of natural dyes has been growing rapidly due to the result of stringent environmental standards...