1) The nitrous acid produced later in the reaction chain is toxic, corrosive, mutagenic, teratogenic, and carcinogenic.

2) Be just nitrous acid because of the inner processing meat products has added a saltpetre, amine in meeting and leben forms sub nitramine , is cancerogen.

3) The reaction of triphenyltin with nitrous acid in aqueous phase in the presence and absence of O2 was studied by a laser flash photolysis technique.

4) Ultraviolet light and nitrous acid are the mutagens of choice for T. viride -285. They are highly effective when used together.

5) This article studies the reactions of nitrous acid with eldest aromatic amine and diazonium salts substituted by halogen, and investigates the condition and mechanism of those reactions.

6) Purpose:Studies the removal effect on ammonia nitrogen, nitrous acid nitrogen, CODMn and turbidity during immobilized nitrobacterias pilot experiment,[http:///nitrous acid.html] and provide reference for the actual project.

7) Carbon monoxide and nitrous acid ester are synthesized through coupling reaction into diester carbonate in the presence of catalyst and at relatively low pressure and temperature.

8) Destaillats's team reckon that NNK is produced when nicotine from tobacco smoke reacts with nitrous acid in the air.

9) Nitrosophenols are formed very easily by the action of nitrous acid on phenols.

10) Results showed that the former afforded an yield over 80% and the regioselectivity (P/O ratio) up to 5.4, both were higher than that using nitrous acid as nitrating agent.

11) It is concluded that the alternating inhibition effect of free ammonia(FA) and free nitrous acid(FNA) on nitrobacteria is responsible for the steady nitrite nitrogen accumulation.

12) In vegetables nitrate content is also higher, but the nitrous acid salt content is low, and basically does not pose a threat to human body health.

13) Objectives: To study the relationship between nocturnal penile tumescence and nitrous acid concentration changes in urine at night.

14) To test the theory, the team deposited either nicotine or tobacco smoke on sheets of paper, and exposed them to nitrous acid.

15) Ambient conditions that include toxic gases such as hydrogen sulfide, sulfurous acid, nitrous acid, chlorine, bromine, methyl bromide, ammonium, etc.

16) The yield and regioselectivity were investigated at various ratios of nitrate to salicylate with copper nitrate comparing with nitrous acid.

17) In this paper, A new controlled depolymerization to chitosan - oligosaccharide from chitosan by nitrous acid is presented.

18) It has studied the action of hydrogen peroxide on nitrous acid.

19) Muriate acid concentration is 15-20 percent, first select 15 percent, nitrosation solvent is nitrous acid metal salt or nitrous acid ester, and sodium nitrate is first selected.

20) Conclusion: the relationship between nocturnal penile tumescence in extent and time and nitrous acid concentration changes in urine is positive correlation.