منابع مشابه
Gallic acid
Anhydrous 3,4,5-trihy-droxy-benzoic acid, C(7)H(6)O(5), is essentially planar, with its non-H atoms exhibiting mean and maximum deviations from coplanarity of 0.014 and 0.0377 (5) Å, respectively. The C-C-C-OH torsion angle about the bond linking the carboxyl group to the benzene ring is -0.33 (10)°. In the crystal, the -COOH groups form centrosymmetric hydrogen-bonded cyclic dimers [graph set ...
متن کاملAn Apparatus for Preparing Isotopically Pure He
The helium extracted from gas wells consists predominantly of He but it also contains traces (a few parts in 10) of the other stable isotope, He. For many purposes, the presence of the He may be neglected. Commercial He, widely used for a variety of cryogenic and other technological applications, usually consists of the two isotopes in their natural relative abundances. There are certain other ...
متن کاملGallic acid pyridine monosolvate
IN THE TITLE COMPOUND (SYSTENATIC NAME: 3,4,5-trihy-droxy-benzoic acid pyridine monosolvate), C(5)H(5)N·C(7)H(6)O(5), the gallic acid mol-ecule is essentially planar (r.m.s deviation = 0.0766 Å for non-H atoms) and is linked to the pyridine mol-ecule by an O-H⋯N hydrogen bond. An intra-molecular O-H⋯O hydrogen bond occurs in the gallic acid mol-ecule. The gallic acid and pyridine mean planes ma...
متن کاملMethods of preparing spectrographically pure praseodymium salts
An ion-exchange process was developed for the separation of spectrographically pure praseodymium salts in kilogram amounts from commercially available concentrates. The application of either 0.5% or 0.1% citrate solutions as eluting agents was show to result in excellent separations of praseodymium from samarium, neodymium, and lanthanum when the mixed rare earths were eluted from Amberlite IR-...
متن کاملDifferent generation of inhibitors against gallic acid-induced apoptosis produces different sensitivity to gallic acid.
Gallic acid (3,4,5-trihydroxybenzoic acid), a naturally occurring plant phenol, showed selective cytotoxicity against tumor cells with higher sensitivity than normal cells such as hepatocytes and keratinocytes. To elucidate the difference in sensitivity between normal and tumor cells to gallic acid, we studied whether the inhibitor of gallic acid-induced apoptosis existed or not. A serum-free c...
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ژورنال
عنوان ژورنال: The Philosophical Magazine
سال: 1805
ISSN: 1941-5796,1941-580X
DOI: 10.1080/14786440508562485