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Nitrate oxide

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https://www.readbyqxmd.com/read/28088117/adsorption-of-phosphate-from-aqueous-solution-using-iron-zirconium-modified-activated-carbon-nanofiber-performance-and-mechanism
#1
Weiping Xiong, Jing Tong, Zhaohui Yang, Guangming Zeng, Yaoyu Zhou, Dongbo Wang, Peipei Song, Rui Xu, Chen Zhang, Min Cheng
Phosphate (P) removal is significant for the prevention of eutrophication in natural waters. In this paper, a novel adsorbent for the removal of P from aqueous solution was synthesized by loading zirconium oxide and iron oxide onto activated carbon nanofiber (ACF-ZrFe) simultaneously. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The results showed that P adsorption was highly pH dependent and the optimum pH was found to be 4...
January 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28087899/increasing-dietary-nitrate-has-no-effect-on-cancellous-bone-loss-or-fecal-microbiome-in-ovariectomized-rats
#2
Melissa N Conley, Cooper Roberts, Thomas J Sharpton, Urszula T Iwaniec, Norman Hord
Studies suggest diets rich in fruit and vegetables reduce bone loss, although the specific compounds responsible are unknown. Substrates for endogenous nitric oxide (NO) production, including organic nitrates and dietary nitrate, may support NO production in age-related conditions, including osteoporosis. We investigated the capability of dietary nitrate to improve NO bioavailability, reduce bone turnover and loss. Six-month-old Sprague Dawley rats [30 ovariectomized (OVX) and 10 sham-operated (sham)] were randomized into 3 groups: (1) vehicle (water) control, (2) low-dose nitrate (LDN, 0...
January 13, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28079248/inhibition-of-matrix-metalloproteinase-9-by-a-barbiturate-nitrate-hybrid-ameliorates-dextran-sulphate-sodium-induced-colitis-effect-on-inflammation-related-genes
#3
Shane O'Sullivan, Jun Wang, Maria T Pigott, Neil Docherty, Noreen Boyle, Samuel Kana Lis, John F Gilmer, Carlos Medina
BACKGROUND AND PURPOSE: Matrix metalloproteinase-9 is upregulated in Ulcerative Colitis and implicated in the pathology of the disease. In this study, we have examined the effects of a barbiturate-based MMP inhibitor incorporating a nitric oxide donor/mimetic group (dinitrate-barbiturate) in the intestinal injury induced by dextran sulphate sodium (DSS). EXPERIMENTAL APPROACH: In-vivo experiments were carried out using male Wistar rats given DSS 5% ad libitum in drinking water...
January 12, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28078050/complete-genome-sequence-of-lutibacter-profundi-lp1-t-isolated-from-an-arctic-deep-sea-hydrothermal-vent-system
#4
Juliane Wissuwa, Sven Le Moine Bauer, Ida Helene Steen, Runar Stokke
Lutibacter profundi LP1(T) within the family Flavobacteriaceae was isolated from a biofilm growing on the surface of a black smoker chimney at the Loki's Castle vent field, located on the Arctic Mid-Ocean Ridge. The complete genome of L. profundi LP1(T) is the first genome to be published within the genus Lutibacter. L. profundi LP1(T) consists of a single 2,966,978 bp circular chromosome with a GC content of 29.8%. The genome comprises 2,537 protein-coding genes, 40 tRNA species and 2 rRNA operons. The microaerophilic, organotrophic isolate contains genes for all central carbohydrate metabolic pathways...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/28075565/redox-couple-involving-nox-in-aerobic-pd-catalyzed-oxidation-of-sp-3-c-h-bonds-direct-evidence-for-pd-no3-no2-interactions-involved-in-oxidation-and-reductive-elimination
#5
Margot N Wenzel, Philippa K Owens, Joshua T W Bray, Jason M Lynam, Pedro M Aguiar, Christopher Reed, James D Lee, Jacqueline F Hamilton, Adrian C Whitwood, Ian J S Fairlamb
NaNO3 is used in oxidative Pd-catalyzed processes as a complementary co-catalyst to common oxidants, e.g., Cu(II) salts, in C-H bond activation and Wacker oxidation processes. NaNO3 and NaNO2 (with air or O2) assist the sp(3)-C-H bond acetoxylation of substrates bearing an N-directing group. It has been proposed previously that a redox couple is operative. The role played by NOx anions is examined in this investigation. Evidence for an NOx anion interaction at Pd(II) is presented. Palladacyclic complexes containing NOx anions are competent catalysts for acetoxylation of 8-methylquinoline, with and without exogenous NaNO3...
January 11, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28072419/an-acid-tolerant-ammonia-oxidizing-%C3%AE-proteobacterium-from-soil
#6
Masahito Hayatsu, Kanako Tago, Ikuo Uchiyama, Atsushi Toyoda, Yong Wang, Yumi Shimomura, Takashi Okubo, Futoshi Kurisu, Yuhei Hirono, Kunihiko Nonaka, Hiroko Akiyama, Takehiko Itoh, Hideto Takami
Nitrification, the microbial oxidation of ammonia to nitrate via nitrite, occurs in a wide range of acidic soils. However, the ammonia-oxidizing bacteria (AOB) that have been isolated from soil to date are acid-sensitive. Here we report the isolation and characterization of an acid-adapted AOB from an acidic agricultural soil. The isolated AOB, strain TAO100, is classified within the Gammaproteobacteria based on phylogenetic characteristics. TAO100 can grow in the pH range of 5-7.5 and survive in highly acidic conditions until pH 2 by forming cell aggregates...
January 10, 2017: ISME Journal
https://www.readbyqxmd.com/read/28071702/nitrogen-loss-by-anaerobic-ammonium-oxidation-in-unconfined-aquifer-soils
#7
Shanyun Wang, Dirk Radny, Shuangbing Huang, Linjie Zhuang, Siyan Zhao, Michael Berg, Mike S M Jetten, Guibing Zhu
Anaerobic ammonium oxidation (anammox) is recognized as an important process for nitrogen cycling, yet little is known about its role in the subsurface biosphere. In this study, we investigated the presence, abundance, and role of anammox bacteria in upland soil cores from Tianjin, China (20 m depth) and Basel, Switzerland (10 m depth), using isotope-tracing techniques, (q)PCR assays, and 16 S rRNA &hzsB gene clone libraries, along with nutrient profiles of soil core samples. Anammox in the phreatic (water-saturated) zone contributed to 37...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28071009/evolution-of-free-amino-acids-biogenic-amines-and-n-nitrosoamines-throughout-ageing-in-organic-fermented-beef
#8
Karolina M Wójciak, Elżbieta Solska
BACKGROUND: In recent years, interest in uncured meat products has grown and studies were carried out on the use of substances which could replace nitrites, such as acid whey. In spite of this problem in fermented meat products, there is no information regarding the effects of prolonged ageing on the formation of chemical (nitrosoamines, biogenic amines, secondary lipid oxidation products) and microbiological (L. monocytogenes, S. aureus, OLD) toxicants in fermented beef marinated with acid whey...
April 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28069011/myeloperoxidase-oxidized-high-density-lipoprotein-impairs-atherosclerotic-plaque-stability-by-inhibiting-smooth-muscle-cell-migration
#9
Boda Zhou, Lingyun Zu, Yong Chen, Xilong Zheng, Yuhui Wang, Bing Pan, Min Dong, Enchen Zhou, Mingming Zhao, Youyi Zhang, Lemin Zheng, Wei Gao
BACKGROUND: High density lipoprotein (HDL) has been proved to be a protective factor for coronary heart disease. Notably, HDL in atherosclerotic plaques can be nitrated (NO2-oxHDL) and chlorinated (Cl-oxHDL) by myeloperoxidase (MPO), likely compromising its cardiovascular protective effects. METHOD: Here we determined the effects of NO2-oxHDL and Cl-oxHDL on SMC migration using wound healing and transwell assays, proliferation using MTT and BrdU assays, and apoptosis using Annexin-V assay in vitro, as well as on atherosclerotic plaque stability in vivo using a coratid artery collar implantation mice model...
January 10, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28068095/potent-inhibition-of-nitric-oxide-releasing-bifendate-derivatives-against-drug-resistant-k562-a02-cells-in-vitro-and-in-vivo
#10
Xiaoke Gu, Zhangjian Huang, Zhiguang Ren, Xiaobo Tang, Rongfang Xue, Xiaojun Luo, Sixun Peng, Hui Peng, Bin Lu, Jide Tian, Yihua Zhang
Multidrug resistance is a major obstacle to successful chemotherapy for leukemia. In this study, a series of nitric oxide (NO)-releasing bifendate derivatives (7a-n) were synthesized. Biological evaluation indicated that the most active compound (7a) produced relatively high levels of NO and significantly inhibited the proliferation of drug-resistant K562/A02 cells in vitro and in vivo. In addition, 7a induced the mitochondrial tyrosine nitration, and the intracellular accumulation of rhodamine 123 by inhibiting P-gp activity in K562/A02 cells...
January 9, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28067283/theoretical-insight-into-oh-and-cl-initiated-oxidation-of-cf3och-cf3-2-and-cf3ocf2cf2h-fate-of-cf3oc-x%C3%A2-cf3-2-and-cf3ocf2cf2x%C3%A2-radicals-x-o-o2
#11
Feng-Yang Bai, Yuan Ma, Shuang Lv, Xiu-Mei Pan, Xiu-Juan Jia
In this study, the mechanistic and kinetic analysis for reactions of CF3OCH(CF3)2 and CF3OCF2CF2H with OH radicals and Cl atoms have been performed at the CCSD(T)//B3LYP/6-311++G(d,p) level. Kinetic isotope effects for reactions CF3OCH(CF3)2/CF3OCD(CF3)2 and CF3OCF2CF2H/CF3OCF2CF2D with OH and Cl were estimated so as to provide the theoretical estimation for future laboratory investigation. All rate constants, computed by canonical variational transition state theory (CVT) with the small-curvature tunneling correction (SCT), are in reasonable agreement with the limited experimental data...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28067100/effects-of-a-single-bout-of-strenuous-exercise-on-platelet-activation-in-female-apoe-ldlr-mice
#12
K Przyborowski, H Kassassir, M Wojewoda, K Kmiecik, B Sitek, K Siewiera, A Zakrzewska, A M Rudolf, R Kostogrys, C Watala, J A Zoladz, S Chlopicki
Strenuous physical exercise leads to platelet activation that is normally counterbalanced by the production of endothelium-derived anti-platelet mediators, including prostacyclin (PGI2) and nitric oxide (NO). However, in the case of endothelial dysfunction, e.g. in atherosclerosis, there exists an increased risk for intravascular thrombosis during exercise that might be due to an impairment in endothelial anti-platelet mechanisms. In the present work, we evaluated platelet activation at rest and following a single bout of strenuous treadmill exercise in female ApoE/LDLR(-)(/-) mice with early (3-month-old) and advanced (7-month-old) atherosclerosis compared to female age-matched WT mice...
January 9, 2017: Platelets
https://www.readbyqxmd.com/read/28065651/nitrate-reductase-regulates-plant-nitric-oxide-homeostasis
#13
REVIEW
Alejandro Chamizo-Ampudia, Emanuel Sanz-Luque, Angel Llamas, Aurora Galvan, Emilio Fernandez
Nitrate reductase (NR) is a key enzyme for nitrogen acquisition by plants, algae, yeasts, and fungi. Nitrate, its main substrate, is required for signaling and is widely distributed in diverse tissues in plants. In addition, NR has been proposed as an important enzymatic source of nitric oxide (NO). Recently, NR has been shown to play a role in NO homeostasis by supplying electrons from NAD(P)H through its diaphorase/dehydrogenase domain both to a truncated hemoglobin THB1, which scavenges NO by its dioxygenase activity, and to the molybdoenzyme NO-forming nitrite reductase (NOFNiR) that is responsible for NO synthesis from nitrite...
January 5, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28064552/the-novel-role-of-%C3%AE-aescin-in-attenuating-ccl4-induced-hepatotoxicity-in-rats
#14
Harsimran Singh, Shabir Sidhu, Kanwaljit Chopra, M U Khan
CONTEXT: β-Aescin has anti-inflammatory, anti-oxidant and antiedematous properties. OBJECTIVE: The present study investigated the hepatoprotective effect and underlying mechanisms of β-aescin in CCl4-induced liver damage. MATERIALS AND METHODS: Thirty-five Wistar rats were divided into six groups: normal control, CCl4 control, silymarin (50 mg/kg, p.o) and β-aescin (0.9, 1.8 and 3.6 mg/kg, i.p.) treatment for 14 d. CCl4 (1 mL/kg, i...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28064394/sacrificial-photocatalysis-removal-of-nitrate-and-hydrogen-production-by-nano-copper-loaded-p25-titania-a-kinetic-and-ecotoxicological-assessment
#15
Roberta Lucchetti, Antonietta Siciliano, Laura Clarizia, Danilo Russo, Ilaria Di Somma, Francesco Di Natale, Marco Guida, Roberto Andreozzi, Raffaele Marotta
The photocatalytic removal of nitrate with simultaneous hydrogen generation was demonstrated using zero-valent nano-copper-modified titania (P25) as photocatalyst in the presence of UV-A-Vis radiation. Glycerol, a by-product in biodiesel production, was chosen as a hole scavenger. Under the adopted experimental conditions, a nitrate removal efficiency up to 100% and a simultaneous hydrogen production up to 14 μmol/L of H2 were achieved (catalyst load = 150 mg/L, initial concentration of nitrate = 50 mg/L, initial concentration of glycerol = 0...
January 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28064122/correlation-between-degradation-pathway-and-toxicity-of-acetaminophen-and-its-by-products-by-using-the-electro-fenton-process-in-aqueous-media
#16
Thi Xuan Huong Le, Thi Van Nguyen, Zoulkifli Amadou Yacouba, Laetitia Zoungrana, Florent Avril, Duy Linh Nguyen, Eddy Petit, Julie Mendret, Valerie Bonniol, Mikhael Bechelany, Stella Lacour, Geoffroy Lesage, Marc Cretin
The evolution of the degradation by-products of an acetaminophen (ACE) solution was monitored by HPLC-UV/MS and IC in parallel with its ecotoxicity (Vibrio fischeri 81.9%, Microtox(®) screening tests) during electro-Fenton (EF) oxidation performed on carbon felt. The aromatic compounds 2-hydroxy-4-(N-acetyl) aminophenol, 1,4-benzoquinone, benzaldehyde and benzoic acid were identified as toxic sub-products during the first stage of the electrochemical treatment, whereas aliphatic short-chain carboxylic acids (oxalic, maleic, oxamic, formic, acetic and fumaric acids) and inorganic ions (ammonium and nitrate) were well identified as non-toxic terminal sub-products...
December 21, 2016: Chemosphere
https://www.readbyqxmd.com/read/28063182/biogeochemical-spatio-temporal-transformation-of-copper-in-aspergillus-niger-colonies-grown-on-malachite-with-different-inorganic-nitrogen-sources
#17
Marina Fomina, Andrew D Bowen, John M Charnock, Valentin S Podgorsky, Geoffrey M Gadd
This work elucidates spatio-temporal aspects of the biogeochemical transformation of copper mobilized from malachite (Cu2 (CO3 )(OH)2 ) and bioaccumulated within Aspergillus niger colonies when grown on different inorganic nitrogen sources. It was shown that the use of either ammonium or nitrate determined how copper was distributed within the colony and its microenvironment and the copper oxidation state and succession of copper coordinating ligands within the biomass. Nitrate-grown colonies yielded ∼1.7× more biomass, bioaccumulated ∼7× less copper, excreted ∼1...
January 7, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28060334/measuring-nitrite-and-nitrate-metabolites-in-the-nitric-oxide-pathway-in-biological-materials-using-the-chemiluminescence-method
#18
Barbora Piknova, Ji Won Park, Katelyn S Cassel, Cameron N Gilliard, Alan N Schechter
Nitric oxide (NO) is one of the main regulator molecules in vascular homeostasis and also a neurotransmitter. Enzymatically produced NO is oxidized into nitrite and nitrate by interactions with various oxy-heme proteins and other still not well known pathways. The reverse process, reduction of nitrite and nitrate into NO had been discovered in mammals in the last decade and it is gaining attention as one of the possible pathways to either prevent or ease a whole range of cardiovascular, metabolic and muscular disorders that are thought to be associated with decreased levels of NO...
December 25, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28060293/automated-high-resolution-mobile-collection-system-for-the-nitrogen-isotopic-analysis-of-nox
#19
Paul K Wojtal, David J Miller, Mary O'Conner, Sydney C Clark, Meredith G Hastings
Nitrogen oxides (NOx = NO + NO2) are a family of atmospheric trace gases that have great impact on the environment. NOx concentrations directly influence the oxidizing capacity of the atmosphere through interactions with ozone and hydroxyl radicals. The main sink of NOx is the formation and deposition of nitric acid, a component of acid rain and a bioavailable nutrient. NOx is emitted from a mixture of natural and anthropogenic sources, which vary in space and time. The collocation of multiple sources and the short lifetime of NOx make it challenging to quantitatively constrain the influence of different emission sources and their impacts on the environment...
December 20, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28059788/silicic-acid-and-beer-consumption-reverses-the-metal-imbalance-and%C3%A2-the%C3%A2-prooxidant-status-induced-by%C3%A2-aluminum-nitrate-in-mouse-brain
#20
María José González-Muñoz, Alba Garcimartán, Isabel Meseguer, Carmen José Mateos-Vega, José María Orellana, Antonio Peña-Fernández, Juana Benedí, Francisco J Sánchez-Muniz
BACKGROUND: Emerging evidence suggests that by affecting mineral balance, aluminum (Al) may enhance some events associated with neurodegenerative diseases. AIM: To examine the effect of Al(NO3)3 exposure on brain Al, cooper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), silicon (Si), and zinc (Zn) levels, and the metal-change implication in brain oxidant and inflammatory status. METHODS: Four groups of six-week-old male NMRI mice were treated for three months: i) controls, administrated with deionized water; ii) Al, which received Al(NO3)3; iii) Al+silicic acid, which were given Al(NO3)3 plus silicic acid; and iv) Al+beer, which received Al(NO3)3 plus beer...
December 3, 2017: Journal of Alzheimer's Disease: JAD
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