نتایج جستجو برای: diazo coupling
تعداد نتایج: 153420 فیلتر نتایج به سال:
The reaction of hydrazones with iodine/base leads to diazo intermediates that can be trapped by an internal alkene or alkyne.
One of the difficulties associated with research on ergothioneine has been the lack of completely reliable methods for the quantitative determination of the compound in blood and other tissues. Ergothioneine was originally discovered to be present in the red blood cell by Benedict et al. (1, 2) and by Hunter and Eagles (3, 4), some 25 years ago, because of its reducing action on the arsenophosp...
The apparent active site of human leukocyte glycoasparaginase (N4-(beta-acetylglucosaminyl)-L-asparaginase EC 3.5.1.26) has been studied by labeling with an asparagine analogue, 5-diazo-4-oxo-L-norvaline. Glycoasparaginase was purified 4,600-fold from human leukocytes with an overall recovery of 12%. The purified enzyme has a Km of 110 microM, a Vmax of 34 mumol x l-1 x min-1, and a specific ac...
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