background and objectives:lallemantia iberica (lamiaceae) is a medicinal plant distributed in different parts of iran. this research, has evaluated the phytochemical constituents and antioxidant activity of the aerial parts of the plant. methods: different chromatographic methods such as column chromatographies using silica gel (normal and reversed phases), sephadex lh-20 and hplc were used for...

From the cultures of spore-derived mycobionts of the lichen Lecanora leprosa a novel naphtho[1,8-cd]pyran-3-one derivative, lecanopyrone, was isolated. Its structure was determined by spectroscopic methods. The assembly pattern of acetate units in its biosynthesis was verified using sodium [1-13C]-acetate and sodium [1,2-13C2]-acetate.

A novel europium-based hybrid material, Eu( d -facam) 3 -TMAOAc (tetramethylammonium acetate), with ultra-high luminescence, excellent circular polarization and remarkable thermostability was prepared.

Rats trained to detect propyl acetate and valeric acid and to discriminate between propyl acetate and amyl acetate and between valeric acid and butyric acid were injected with a low dose of 3-methyl indole, a treatment that produces well-defined and selective deafferentation of the olfactory bulbs. Treatment completely deafferented most but not all bulbar loci for aliphatic acids and at least d...

In the present manuscript, three different 4,7-dihydroxycoumarin derivatives were prepared and structurally characterized by crystallographic spectroscopic techniques in combination with B3LYP-D3BJ theoretical method. Cytotoxic antimicrobial activities of investigated compounds screened against cell lines microorganisms. HCT-116 cells most sensitive to 3-(1-(2-hydroxyphenyl)amino) ethylidene)-2...

The thermal stability of a series of dialkylimidazolium carboxylate ionic liquids has been investigated using a broad range of experimental and computational techniques. Ionic liquids incorporating fluoroalkyl carboxylate anions were found to have profoundly differing thermal stabilities and decomposition mechanisms compared with their non-fluorinated analogues. 1-Ethyl-3-methylimidazolium acet...

Three novel lupane-, bauerane-, and euphane-type triterpenoids (1-3), in addition to seven known triterpenoids (4-10)-18β,19β-epoxy-21β-hydroxylupan-3β-yl acetate (4), 21-oxolup-18-en-3β-yl acetate (5), betulin (6), officinatrione (7), 11α-methoxyolean-12-en-3-one (8), eupha-7,24-dien-3-one (9), and 24-oxoeupha-7,24-dien-3β-yl acetate (10)-were isolated from the roots of Taraxacum officinale. T...

Nachmansohn and Machado (1) discovered a soluble enzyme system in extracts of brain tissue which catalyzed the formation of active acetate in the presence of ATPI and CoA. Active acetate was detected by the acetylation of choline. Later Lipmann (2, 3) reported an enzyme system in extracts of pigeon liver which catalyzed the CoA and ATP-dependent acetylation of sulfanilamide by acetate. The iden...