منابع مشابه
exploring motivation and english test preparation strategies of iranian pre-university candidates during and at the end of test preparation period for konkur examination
the current study aimed at investigating the relationship between motivation and test preparation strategies (tpss) used by iranian pre-university students in their preparation period for the university entrance exam (uee). due to the importance of uee in iran, this study also attempted to show its impact on these two important variables. to this end, 100 pre-university students in an iranian p...
PREPARATION AND BIOLOGIC AS’SAY OF ESTERS OF a-TOCOPHERYLHYDROQiJINONE”
Both the oxidation product of a-tocopherol, ol-tocopherylquinone, and the reduction product of the latter, a-tocopherylhydroquinone (I), have been shown to possess vitamin E activity in preventing or curing nutritional muscular dystrophy in the rabbit (1). Whiie the quinone is far more stable than the hydroquinone (I), its antidystrophic activity is of a lower order. Since I, however, is extrem...
متن کاملPreparation of Alkyl Esters of Pectin and Pectic Acid
Alkyl esters of pectin and pectic acid have been prepared via three different synthetic routes. Enhancements of intrinsic viscosity, binding to bile acids and to isolated soy protein were shown for these novel pectin derivatives. The development of new and improved pectin-containing products may be enhanced by the ease of preparation and improved functionality of such compounds.
متن کاملEnzyme-Mediated Preparation of Flavonoid Esters and Their Applications
Flavonoids comprise a group of plant polyphenols with a broad spectrum of biological activities. They have been shown to exert beneficial effects on human health and play an important role in prevention and/or treatment of several serious diseases, such as cancer, inflammation and cardiovascular disease (Middleton et al., 2000; Rice-Evans, 2001). Flavonoids are important beneficial components o...
متن کاملPreparation of fatty acid methyl esters for gas-liquid chromatography.
A convenient method using commercial aqueous concentrated HCl (conc. HCl; 35%, w/w) as an acid catalyst was developed for preparation of fatty acid methyl esters (FAMEs) from sterol esters, triacylglycerols, phospholipids, and FFAs for gas-liquid chromatography (GC). An 8% (w/v) solution of HCl in methanol/water (85:15, v/v) was prepared by diluting 9.7 ml of conc. HCl with 41.5 ml of methanol....
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1957
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.11-0537