The objective was to study the impacts of implementation fish farming projects (fish breeding), quality water effluents from these enterprises, in upland streams on properties municipalities Manaus and Iranduba. We chose monitor some physical-chemical attributes such as turbidity, dissolved oxygen, chlorophyll-a, ammonia, nitrite, nitrate phosphorus because they are able establish a relationshi...

The study aimed at analyzing the role of each of interleukin-1 (IL-1 ) and Nitric Oxide (NO) in development of peripheral acute inflammation in mice in presence/absence of a one hour pre-administered acetylsalicylic acid (ASA). Eighty male mice were utilized. Carrageenan was administered intraplanterly (0.05 ml of 0.5, 1 or 2%, W/V). The examined parameters were paw volume, IL-1 and nitrite lev...

The role of oxidative stress in the initiation and progression of myelodysplastic syndromes (MDS) as a consequence of iron overload remains unclear. In this study we have simultaneously quantified plasma low-molecular-weight aminothiols, malondialdehyde, nitrite, and nitrate and have studied their correlation with serum iron/ferritin levels, patient treatment (chelation therapy), and clinical o...

We investigated the effects of fermented red beet extract and ascorbic acid on color development in meat emulsions. The pH of meat emulsions containing red beet extract decreased with an increase in the amount of extract added. The redness of the treated meat emulsions was higher than that of the control with no added nitrite or fermented red beet extract (p<0.05), though the redness of the mea...

A laboratory scale activated sludge sequencing batch reactor was operated in order to obtain total removal of influent ammonia (200; 300 and 500 mg NH3-N.L) with sustained nitrite accumulation at the end of the aerobic stages with phenol (1,000 mg C6H5OH.L) as the carbon source for denitrifying microorganisms during the anoxic stages. Ammonia removal above 95% and ratios of (NO2-N / (NO2-N + NO...

The reduction of nitrite to nitric oxide has been shown to require DPN or TPN, FAD or FMN,’ copper, and iron as electron carriers. This was determined by the stimulation of nitrite disappearance as well as by increased nitric oxide formation. Evidence was also presented indicating that the reduction of NO to Nz was stimulated by the same cofactors. The evidence was based on the stimulation of N...

The purpose of this study was to investigate the nitrification and nitrogen removal from centrate produced in the dewatering process of anaerobically digested sludge, using a single-unit, single-zone submerged attached-growth bioreactor. The nitrogen loading varied from 0.54 to 1.51 kg-N/m3 x d. Stable ammonia oxidation (nitritification) to nitrite was demonstrated. A nitritification efficiency...

BACKGROUND Nitrosative and acid stress play an important role in the pathogenesis of asthma. The aim of this study was to evaluate whether, in asthmatics, a link exists between the concentrations of nitrite/nitrate, ammonia and pH values in exhaled breath condensate (EBC) and asthma severity, lung function, exhaled nitric oxide (F(ENO)), total IgE, eosinophil cationic protein (ECP) and blood eo...

PURPOSE To determine whether bovine corneal endothelial (BCE) cells and keratocytes express the inducible form of nitric oxide synthase (NOS) after exposure to cytokines and lipopolysaccharide (LPS), and to study the regulation of NOS by growth factors. METHODS Cultures of bovine corneal endothelial cells and keratocytes were exposed to increasing concentrations of LPS, interferon-gamma (IFN-...

Changes in the fractions of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in two laboratory-scale reactors were investigated using 16S rRNA probe hybridizations. The reactors were operated in intermittent aeration mode and different aeration cycles to treat anaerobically digested swine wastewater with ammonia concentrations up to 175 mg NH(3)-N/L. High ammonia removals (>98.8%) were...