نتایج جستجو برای: guanidines

تعداد نتایج: 348  

2009
Tsutomu Ishikawa

In the field of organic chemistry, a base is generally defined as a reagent capable of abstracting proton to yield a carbanion species. At a basic textbook level, organobases are normally limited to amines, which are categorized as very weak bases according to the above definition. The introduction of an imine function (1⁄4NH) to the a-carbon of amines affords more basic amine species, amidines...

Journal: :IARC scientific publications 1987
S E Shephard M E Hegi W K Lutz

Nitrosation of dietary components has been combined with the 4-(para-nitrobenzyl)pyridine (NBP) colorimetric test for screening alkylating agents and with the Ames test for the detection of mutagenic activity. This allowed the investigation of short-lived nitrosation products of dietary components which generate electrophilic degradation products requiring no metabolic activation (natural amino...

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