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The questions of whether and how N-nitroso compounds (NOC) may be inducing cancer in humans are discussed. The principal subjects… Expand Overnight urine samples were collected from approximately 60 male adults in each of 69 counties of China in 1989. Two specimens… Expand The N-nitrosoproline (NPRO) test for in vivo nitrosation was applied in a study of 44 rural Nebraska men drinking high- or low… Expand Increasing levels of nitrate (NO3-) in drinking water in Denmark is of concern due to the possibility of an associated increase… Expand A relationship between ascorbic acid intake and N-nitrosoproline (NPRO) excretion in humans on a controlled diet was established… Expand Gas chromatography-high resolution mass spectrometry methods were developed for quantifying nitrosodimethylamine (NDMA) and… Expand Levels of nitrosoproline (NPRO) in the urine of subjects on a Western-style free-choice diet typically ranged from 1 to 2 ng/ml… Expand It was the goal of this study to assay the potential of inhaled cigarette smoke for endogenous N-nitrosation of amines in smokers… Expand Endogenous formation of N-nitrosoproline (NPRO) was demonstrated by monitoring its excretion in the urine of a male volunteer who… Expand The metabolism of [U14C]nitrosoproline and [carboxyl-14C]-nitrosoproline was studied in the rat. In most experiments, less than 1… Expand