A series of four random copolyesters were synthesized by the polycondensation of a chalcone diol by making use of two diacid chlorides namely terephthaloyl chloride and succinyl chloride. The four chalcone diols involved are (2E)-1,3-bis(4-hydroxyphenyl)prop-2-en-1-one, (2E)-1-(4-hydroxyphenyl)-3-(4-hydroxy-3-methoxyphenyl)-prop-2-en1-one, (2E)-1-(4-hydroxy-3-methoxyphenyl)-3-(4-hydroxyphenyl)-...

Six unsymmetrical diorganyltellurium(IV) dichlorides RR'TeCl2 (where R= phenacyl-, 1-naphthacyl-, and styrylacyl- and R' = p-methoxyphenyl, p-hydroxyphenyl-, and 3-methyl-4-hydoxyphenyl-) were tested for their antibacterial activity against gram-positive (Bacillus subtilis ATCC 6633 and Staphylococcus aureus ATCC 25923) and gram-negative (Escherichia coli ATCC 25922. Pseudomonas aeruginosa ATCC...

PURPOSE To investigate UV filter synthesis in the human lens, in particular the biosynthetic origin of the second most abundant UV filter compound, 4-(2-amino-3-hydroxyphenyl)-4-oxobutanoic acid O-beta-D-glucoside. METHODS Human lenses were analyzed by high-performance liquid chromatography (HPLC) after separate incubation with 3H-tryptophan (3H-Trp), beta-benzoylacrylic acid, D,L-alpha-amino...

In the present paper, many unsaturated polyesters has been synthesized using maleic anhydride, phthalic anhydride and succinic for esterification with new monomer [E)-1-(4-hydroxyphenyl)-3-(3-methoxy-4-hydroxyphenyl) prop-2-en-1-one]. These were polymerized by condensation reaction . Their chemical structures characterized FTIR, 13C-NMR 1H NMR spectroscopy. Thermal properties have analysed Diff...

Four new phenylethanoid glycosides (1: -4: ), 1-β-p-hydroxyphenyl-ethyl-2-O-acetyl-3,6-di-α-l-rhamnopyranosyl-β-d-glucopyranoside (1: ), 1-β-p-hydroxyphenyl-ethyl-3,6-O-di-α-l-rhamnopyranosyl-β-d-glucopyranoside (2: ), 1-β-p-hydroxyphenyl-ethyl-2-O-acetyl-3,6-di-α-l-rhamnopyranosyl-4-p-coumaroyl-β-d-glucopyranoside (3: ), and 1-β-p-hydroxyphenyl-ethyl-3,6-di-α-l-rhamnopyranosyl-4-p-coumaroyl-β-...