نتایج جستجو برای: nitrogen compounds
تعداد نتایج: 337348 فیلتر نتایج به سال:
This paper continues the study of the relationship between electron density and carcinogenic activity for compounds related to p-dimethylaminoazobenzene (Cancer Res., 29: 1341-1344, 1969) and reports on the seven p-dimethylaminophenylazoquinolines. A relationship was found between carcinogenic activity and the pKfl of the amino nitrogen in these compounds, and in this new series a relationship ...
Heterocyclic nitrogen compounds are extensively used as intermediates in the manufacture of pesticides and herbicides, while their toxicity has been little reported (Chen et al, 1997). In this paper, we report the toxicity of 14 heterocyclic nitrogen compounds to Photobacterium phosphoreum measured by Microtox® test which has been proposed as a cost-effective prescreening procedure to eliminate...
The ability to determine the pyrrolic nitrogen compounds, which present in trace quantities in oils, exhibit changes in both absolute and relative concentrations that correlate with migration distance. Such molecules appear promising as empirical but quantitative indicators of the relative distances of oils and present a first step towards true source to oil reservoir distance indicators. Quant...
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