Nitrate is reduced by a bacterial nitrate reductase. Facultative anaerobic bacteria use nitrate as an alternative electron acceptor to oxygen under hypoxic conditions. Nitrite is protonated under ...

Whereas bacteria are extremely effective nitrate ... Although an early study indicated the presence of some anaerobic nitrate reduction occurring in rodent intestinal tissues 27, later the same ...

When bacteria in the mouth break down ... 001) increases in nitrate, nitrite, and nitric oxide reductase genes in stool samples collected from migraineurs. In oral samples, nitrate, nitrite ...

Limnology and Oceanography, Vol. 55, No. 3 (May 2010), pp. 1064-1074 (11 pages) We elucidate the controls on the δ¹ɸO values of microbially produced nitrate by tracking the δ¹ɸO of nitrite and nitrate ...

Denitrification is a series of reduction reactions starting with nitrate and ending with the reduction of N 2 O to nitrogen gas, with no greenhouse effect. This reaction is unique to ...

Caltech researchers have discovered a new class of enzymes that enable a myriad of bacteria to "breathe" nitrate when in low-oxygen conditions. While this is an evolutionary advantage for bacterial ...

For decades the city of Cold Spring, Minn., has wrestled with pollution from farms fouling its drinking water. Sealing contaminated wells and digging new ones didn't fix it. Changes to farm ...

If found in higher levels than normal, they may cause migraine headaches. Higher levels of nitrate reducing bacteria in the oral cavity may cause migraine headaches, rules a recent study at the ...

753-762 (10 pages) We examined the oxygen isotopic systematics for ammonia oxidation, the first step in the regeneration of nitrate from ammonium ... produced by four species of ammonia-oxidizing ...