This study investigated the potential of aeration control for the achievement of N-removal over nitrite with aerobic granular sludge in sequencing batch reactors. N-removal over nitrite requires less COD, which is particularly interesting if COD is the limiting parameter for nutrient removal. The nutrient removal performances for COD, N and P have been analyzed as well as the concentration of n...

The interaction of plasma with liquid generates nitrogen species including nitrite (NO(-) 2). Therefore, the color developing capacity of plasma-treated water (PTW) as a nitrite source for meat curing was investigated in this study. PTW, which is generated by surface dielectric barrier discharge in air, and the increase of plasma treatment time resulted in increase of nitrite concentration in P...

Effects of external carbon sources and COD/NO(3)-N on nitrite accumulation through denitrification were studied at a temperature of 28±2.0 °C using mixed activated sludge. Nitrite accumulation was observed for each type of carbon source studied. Glucose resulted in the greatest nitrite accumulation and production rate, which were 14.51±2.41 mg/L and 0.121±0.013 g N/(g VSS d), respectively. More...

Results with strain am-la, a glutamate dehydrogenaseless mutant, showed that ammonium ions must first be metabolized in order to repress nitrite reductase in Neurospora.

-'Pablo García-Lugo 1t, Celedonio González l , Germán Perdomo l , Nélida Brito l , Julio Ávila l , José M. de la Rosi and José M. Siverio 1* I Departamento de Bioquímico y Biología Molecular, Grupo de! Metabolismo del Nitrógeno, Consejo Superior de Investigaciones Oentifrcos, Universidad de Lo Laguna, E-38206 Lo Laguna, Teneri(e, Canorias, Spoin 2 Departamento de Microbiología y Biología Celula...

In this work, a low-cost, portable device is developed to detect colorimetric assays for in-field and point-of-care (POC) analysis. The device can rapidly detect both pH values and nitrite concentrations of five different samples, simultaneously. After mixing samples with specific reagents, a high-resolution digital camera collects a picture of the sample, and a single-board computer processes ...

Conventional and nitrite-free frankfurters in loosely wrapped packages were compared as to their ability to support growth of Salmonella, Staphylococcus, and their naturally occurring spoilage flora at 7 C (simulating refrigerated storage) and 20 C (simulating possible temperature abuse). At 7 C Salmonella did not grow in either type of frankfurter; Staphylococcus and the natural spoilage flor...

Single-molecule measurements are a valuable tool for revealing details of enzyme mechanisms by enabling observation of unsynchronized behavior. However, this approach often requires immobilizing the enzyme on a substrate, a process which may alter enzyme behavior. We apply a microfluidic trapping device to allow, for the first time, prolonged solution-phase measurement of single enzymes in solu...

Final internal processing temperatures within the range of 63 to 74 degrees C did not alter the degree of botulinal inhibition in inoculated perishable canned comminuted cured pork abused at 27 degrees C. Adding hemoglobin to the formulation reduced residual nitrite after processing and decreased botulinal inhibition. Different meats yielded different rates of botulinal outgrowth when substitut...

In the title mol-ecular salt, C(6)H(16)N(+)·NO(2) (-), the cation forms two N-H⋯O hydrogen bonds to nearby nitrite anions which link the ionic units into chains propagating along the b-axis direction.