Topic
Nitrite
About: Nitrite is a research topic. Over the lifetime, 15425 publications have been published within this topic receiving 484581 citations.
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TL;DR: The reaction mechanism of NO reduction by propene over silver-supported TiO2-ZrO2 catalyst was studied by means of in situ FT-IR, combined with catalytic activity studies as mentioned in this paper.
109 citations
TL;DR: In this paper, the authors used a chemiluminescence method to measure nitrite concentrations in the water column at the U.S. JGOFS/WOCE time-series station, ALOHA (22°45′ N, 158°W), from September 1989 to November 1993.
Abstract: We used a chemiluminescence method to measure nitrite concentrations in the water column at the U.S. JGOFS/WOCE time-series station, ALOHA (22°45′ N, 158°W), from September 1989 to November 1993. We present a detailed time-series of nitrite in the upper 200 m in order to examine the dynamics of the primary nitrite maximum. Our results reveal a double-peaked structure to this feature that is consistent with a vertical separation of the reductive and oxidative microbial processes responsible for nitrite production. The possibility of using the nitrite content of this upper layer as an indicator of nitrogen export from the euphotic zone is explored and rejected. Midwater nitrite profiles (200–1000 m) show a supra-exponential decrease in concentration with depth and reveal month-to-month variability. Nitrite concentrations in deep waters (1000–4800 m) are in the nanomolar-subnanomolar range, and are similar to Atlantic data, arguing against significant basin-scale differences in the deep nitrite pool. Deep profiles also show measurable variability on both monthly and annual timescales. We speculate that this deep variability may be associated with nitrate reduction by sinking phytoplankton cells.
109 citations
TL;DR: The reaction of nitrogen dioxide with aqueous sulfite solutions, in the presence and in the absence of oxygen, has been studied using Raman spectroscopy to determine product concentrations.
Abstract: The reaction of nitrogen dioxide with aqueous sulfite solutions, in the presence and in the absence of oxygen, has been studied using Raman spectroscopy to determine product concentrations. The products observed include nitrite, sulfate, and dithionate ions. The reaction appears to initially produce nitrite ion and sulfite radical: NO 2 +SO 3 2- →NO 2 - +SO 3 .- . The sulfite radical can undergo either recombination or reaction with oxygen to form SO 5 .-
109 citations
TL;DR: Oral microbiota are necessary for nitrate reduction to vasoactive nitrogen oxides, and the potential of the microbiome in the development of novel nitrate‐ and nitrite‐based therapeutics for PH, CVD and their risk factors is highlighted.
109 citations