Showing 1-30 of 813 results for "AMMONIUM OXIDE"
Jitendra Pant et al.
Acta biomaterialia, 58, 421-431 (2017-06-06)
Although the use of biomedical devices in hospital-based care is inevitable, unfortunately, it is also one of the leading causes of the nosocomial infections, and thus demands development of novel antimicrobial materials for medical device fabrication. In the current study...
Wenyang Li et al.
Comparative biochemistry and physiology. Toxicology & pharmacology : CBP, 225, 108585-108585 (2019-08-10)
Compound ammonium glycyrrhizin (CAG) protects hepatocytes from injury induced by lipopolysaccharide (LPS)/florfenicol (FFC) through a mitochondrial pathway. On this basis, the research was aimed to investigate whether CAG protects hepatocytes from injury induced by LPS/FFC through oxidative stress and the...
Xiang Li et al.
Bioresource technology, 281, 303-308 (2019-03-04)
For municipal wastewater with low temperature and ammonium, conventional oxygen-limited have difficulty achieving long-term stable inhibition of nitrite oxidizing bacteria (NOB) and stable nitritation. So a partial nitrification-anaerobic ammonium oxidation integrated reactor with independent partitions was used to investigate the...
Rodney T Venterea et al.
Scientific reports, 5, 12153-12153 (2015-07-17)
Better understanding of process controls over nitrous oxide (N2O) production in urine-impacted 'hot spots' and fertilizer bands is needed to improve mitigation strategies and emission models. Following amendment with bovine (Bos taurus) urine (Bu) or urea (Ur), we measured inorganic...
J E Pérez-Alfaro et al.
Applied biochemistry and biotechnology, 169(3), 990-1000 (2013-01-09)
The effect of 2-chlorophenol (2-CP) on ammonium and nitrite-oxidizing processes was kinetically evaluated in batch cultures with nitrifying sludge at steady state. Assays with ammonium or nitrite as energy source and 2.5, 5.0, or 10.0 mg 2-CP-C/l were conducted. Control assays...
Yossi Zafrani et al.
Organic & biomolecular chemistry, 9(24), 8445-8451 (2011-11-02)
The reactions of the chemical warfare agents (CWAs) 2,2'-dichloroethyl sulfide (HD), O-ethyl S-2-(diisopropylamino)-ethyl methylphosphonothioate (VX) and isopropyl methylphosphonofluoridate (GB) with various metal oxide-supported quaternary ammonium fluorides (QAF) and/or potassium fluoride (KF) reagents are described. These active sorbents, which were prepared...
Boran Kartal et al.
FEMS microbiology reviews, 37(3), 428-461 (2012-12-06)
Anaerobic ammonium-oxidizing (anammox) bacteria primarily grow by the oxidation of ammonium coupled to nitrite reduction, using CO2 as the sole carbon source. Although they were neglected for a long time, anammox bacteria are encountered in an enormous species (micro)diversity in...
Ziye Hu et al.
Biotechnology letters, 35(8), 1145-1154 (2013-04-02)
Anaerobic ammonium-oxidizing (anammox) bacteria convert ammonium to N2 with nitrite as the terminal electron acceptor in the absence of O2. Nitritation-anammox bioreactors provide a cost-effective and environment-friendly alternative to conventional nitrification/denitrification nitrogen removal systems. Currently, this process is only applied...
Xiang-li Long et al.
Journal of hazardous materials, 129(1-3), 260-265 (2005-10-21)
A homogeneous catalyst system made up of [Co(NH3)6]2+/I- has been put forward to catalyze the oxidation of concentrated ammonium sulfite. The experiments were performed in a packed column with sulfite concentrations above 2.5 mol l(-1), temperature range 20-65 degrees C...
Zhenhua Chen et al.
Ying yong sheng tai xue bao = The journal of applied ecology, 16(2), 238-242 (2005-04-28)
With simulation test of in-situ soil column, this paper studied the effects of urease inhibitor hydroquinone (HQ), nitrification inhibitors coated calcium carbide (ECC) and dicyandiamide (DCD),and their different combinations on the persistence, oxidation, and leaching of soil urea's hydrolyzed product...
Zhijian Mei et al.
Environmental science & technology, 42(2), 590-595 (2008-02-21)
N-doping technology is introduced to improve Co3O4's Hg0 removal ability and anion activation ability for the first time. The adsorption tests show that N-doped Co3O4 has a higher S(BET) and greater Hg0 removal ability. The reaction mechanism has been carefully...
S Pino et al.
Clinical chemistry, 42(2), 239-243 (1996-02-01)
The chloric acid method is most commonly used to obtain accurate and reproducible measurements of iodine and remove interfering substances. Unfortunately chloric acid is a potential hazard, requiring an explosion-proof hood, among other precautions. We have developed a simple, convenient...
Sergi Garcia-Segura et al.
Water research, 160, 107-117 (2019-05-29)
Ubiquitous presence of chloride in water effluents may result in the unavoidable electrogeneration of active chlorine species when considering the application of electrochemical advanced oxidation processes as water treatment technologies. However, less attention has been drawn to the subsequent generation...
Mark Trimmer et al.
Applied and environmental microbiology, 69(11), 6447-6454 (2003-11-07)
Until recently, denitrification was thought to be the only significant pathway for N(2) formation and, in turn, the removal of nitrogen in aquatic sediments. The discovery of anaerobic ammonium oxidation in the laboratory suggested that alternative metabolisms might be present...
Xiaofang Gao et al.
Chemical communications (Cambridge, England), 51(1), 210-212 (2014-11-20)
A novel ammonium iodide-induced sulfonylation of alkenes with DMSO and water toward the synthesis of vinyl methyl sulfones is described. The process proceeded smoothly under metal-free conditions with high stereoselectivity and good functional group tolerance. The reaction mechanism was revealed...
Karin Stultiens et al.
Applied microbiology and biotechnology, 103(16), 6783-6795 (2019-06-23)
The reject water of anaerobic digestors still contains high levels of methane and ammonium that need to be treated before these effluents can be discharged to surface waters. Simultaneous anaerobic methane and ammonium oxidation performed by nitrate/nitrite-dependent anaerobic methane-oxidizing(N-damo) microorganisms...
Ivar Zekker et al.
Environmental technology, 36(19), 2477-2487 (2015-04-02)
The anaerobic ammonium oxidation (anammox) process is widely used for N-rich wastewater treatment. In the current research the deammonification reactor in a reverse order (first anammox, then the nitrifying biofilm cultivation) was started up with a high maximum N removal...
Anwar Dawas et al.
Bioresource technology, 288, 121599-121599 (2019-06-15)
This study explored the stability of partial ammonium oxidation at low feed concentration (50 g N/m3), suitable for anammox process, in continuous fixed bed up-flow biofilm reactors with external recirculation-aeration. The reactors, filled with crushed basalt, were fed with synthetic medium at...
U Tezel et al.
Water science and technology : a journal of the International Association on Water Pollution Research, 57(4), 541-546 (2008-03-25)
The effect of the quaternary ammonium compound, didecyl dimethyl ammonium chloride (DDAC), on nitrate reduction was investigated at concentrations up to 100 mg/L in a batch assay using a mixed, mesophilic (35 degrees C) methanogenic culture. Glucose was used as...
Zhonghao Li et al.
Chemical communications (Cambridge, England), (41)(41), 6273-6275 (2009-10-15)
Aligned ZnO arrays with branched rods, hexagonal rods, quasi-round rods, hexagonal pyramids and porous nanostructures are constructed on zinc foil in the ionic liquid tetrabutylammonium hydroxide aqueous solution.
Jeongdong Choi et al.
Environmental technology, 35(9-12), 1328-1337 (2014-04-08)
Partial nitritation is an essential first step in anaerobic ammonium oxidation. This study compared the performance of air-lift partial nitritation reactors with attached growth (AG) and suspended growth (SG) without biomass retention using ammonium-rich recirculated liquor produced from the dewatering...
Karol Trojanowicz et al.
Environmental technology, 42(7), 1023-1037 (2019-09-03)
An explanation of possible mechanism of efficient PN/A in hybrid bioreactors was presented. The bottleneck process is nitritation. Surplus nitrite production by ammonium oxidizing bacteria (AOB) is required for assuring the activity of anammox bacteria and eliminating nitrite oxidizing bacteria...
Xia Zhu et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(16), 6328-6333 (2013-04-12)
The continuous increase of nitrous oxide (N2O) abundance in the atmosphere is a global concern. Multiple pathways of N2O production occur in soil, but their significance and dependence on oxygen (O2) availability and nitrogen (N) fertilizer source are poorly understood....
Lai Peng et al.
Environmental science & technology, 54(11), 6968-6977 (2020-04-30)
Denitrifying anaerobic methane oxidation (DAMO) coupled to anaerobic ammonium oxidation (anammox) is a promising technology for complete nitrogen removal with economic and environmental benefit. In this work, a model framework integrating DAMO and anammox process was constructed based on suspended-growth...
Dries Seuntjens et al.
Bioresource technology, 314, 123711-123711 (2020-07-06)
Implementation of mainstream partial nitritation/anammox (PN/A) can lead to more sustainable and cost-effective sewage treatment. For mainstream PN/A reactor, an integrated fixed-film activated sludge (IFAS) was operated (26 °C). The effects of floccular aerobic sludge retention time (AerSRTfloc), a novel aeration...
Zhi Ming Cui et al.
Chemical communications (Cambridge, England), 47(29), 8418-8420 (2011-06-28)
HPMo self-assembly on carbon nanotubes followed by decomposition is used to fabricate highly dispersed MoO(x)/CNTs as a support for high performance of a Pt catalyst towards methanol oxidation.
Falk Bernsmann et al.
Langmuir : the ACS journal of surfaces and colloids, 27(6), 2819-2825 (2011-02-22)
The deposition of "polydopamine" films, from an aqueous solution containing dopamine or other catecholamines, constitutes a new and versatile way to functionalize solid-liquid interfaces. Indeed such films can be deposited on almost all kinds of materials. Their deposition kinetics does...
Marlene Mark Jensen et al.
Applied and environmental microbiology, 73(10), 3151-3158 (2007-03-21)
The effects of three metabolic inhibitors (acetylene, methanol, and allylthiourea [ATU]) on the pathways of N2 production were investigated by using short anoxic incubations of marine sediment with a 15N isotope technique. Acetylene inhibited ammonium oxidation through the anammox pathway...
Patrizia Pignatti et al.
International archives of allergy and immunology, 160(4), 409-419 (2012-11-28)
Persulfate salts are components of bleaching powders widely used by hairdressers during hair-bleaching procedures. Hairdressers are at high risk for occupational asthma and rhinitis, and ammonium persulfate is the main etiologic agent. To explore the effects of ammonium persulfate on...
Guang-Feng Yang et al.
Bioresource technology, 129, 65-71 (2012-12-13)
The short- and long-term effects of oxytetracycline (OTC) on the anaerobic ammonium oxidation (Anammox) process were evaluated. The OTC inhibition of Anammox was substrate-, and especially nitrite-, dependent. The IC50 of OTC in the batch tests on an Anammox mixed...

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