نتایج جستجو برای: strecker reaction
تعداد نتایج: 412564 فیلتر نتایج به سال:
El tema de conservación y administración sitios arqueológicos y, en particular, del arte rupestre ha sido tratado Latinoamérica desde los años 1990 (ver Strecker Taboada, 1995); sin embargo, es un desafío permanente que requiere esfuerzos considerables la coordinación a nivel regional con principales actores responsables. A pesar cantidad aportes publicaciones existentes numerosos países, inter...
1- in a search directed to the reaction of compound)23(the cycloaddition reaction of 1,3- diphenylisobenzofurane)14(with p-benzoquinone)19(,followed by addition of cyclopentadiene was carried out.the specific spacial stracture of its ir,nmr,mass spectra. 2- in another attempt the kinetic stability and behavior of compounds)20(and)23(was studied.the main subject of this study was the highly reve...
Choline [(CH3)3N+CH2CH2OH], also known as trimethyl ethanolamine, is an essential component of mammalian diets as it is required for normal function of cells. It was discovered by Andreas Strecker in 1862, but it remained unrecognized as an essential nutrient for humans until 1998, when dietary reference intakes were established. Choline was initially determined to be essential in the preventio...
Philip R. Dormitzer,* Pirada Suphaphiphat, Daniel G. Gibson, David E. Wentworth, Timothy B. Stockwell, Mikkel A. Algire, Nina Alperovich, Mario Barro, David M. Brown, Stewart Craig, Brian M. Dattilo, Evgeniya A. Denisova, Ivna De Souza, Markus Eickmann, Vivien G. Dugan, Annette Ferrari, Raul C. Gomila, Liqun Han, Casey Judge, Sarthak Mane, Mikhail Matrosovich, Chuck Merryman, Giuseppe Palladino...
The chemical properties of these two substances are strikingly similar. Both compounds are irreversibly decomposed under biological conditions. Alloxan has a half life of 1 minute (1) and dehydroascorbic acid has a half life of a few minutes (2). Alloxan is readily reduced to dialuric acid (3) with which it forms alloxantin (3). Dehydroascorbic acid is readily reduced to ascorbic acid (4) and a...
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