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Sodium nitrite

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https://www.readbyqxmd.com/read/28089828/nitrite-increases-glucose-stimulated-insulin-secretion-and-islet-insulin-content-in-obese-type-2-diabetic-male-rats
#1
Sevda Gheibi, Fatemeh Bakhtiarzadeh, Sajad Jeddi, Khadijeh Farrokhfall, Homeira Zardooz, Asghar Ghasemi
PURPOSE: Reduced bioavailability of nitric oxide (NO) is associated with pathogenesis of type 2 diabetes. Nitrite can act as a substrate for generation of systemic NO. The aim of this study was to examine the effects of nitrite administration on glucose-stimulated insulin secretion (GSIS) and islet insulin content in obese type 2 diabetic rats. METHODS: Male rats were divided into 4 groups: Control, control + nitrite, diabetes, and diabetes + nitrite. Sodium nitrite (50 mg/L in drinking water) was administered for 8 weeks...
January 9, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28068841/listeria-monocytogenes-behaviour-and-quality-attributes-during-sausage-storage-affected-by-sodium-nitrite-sodium-lactate-and-thyme-essential-oil
#2
Carla María Blanco-Lizarazo, Rubén Betancourt-Cortés, Angélica Lombana, Katerine Carrillo-Castro, Indira Sotelo-Díaz
The effects of the addition of nitrite at 200 ppm (N), sodium lactate 1.5% (L) and thyme essential oil at 100 ppm (T1) on Listeria monocytogenes behaviour and ATPase activity inhibition were evaluated, as well as lipid oxidation through the quantification of malonaldehydes, in sausage stored at 8 ℃ for 41 days and at 30 ℃ for 14 days. The changes in the colour profile were performed during storage time at 8 ℃. Quantitative descriptive sensory analyses were performed after two days at 4 ℃...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/28041825/sodium-nitrite-and-sodium-thiosulfate-are-effective-against-acute-cyanide-poisoning-when-administered-by-intramuscular-injection
#3
Vikhyat S Bebarta, Matthew Brittain, Adriano Chan, Norma Garrett, David Yoon, Tanya Burney, David Mukai, Michael Babin, Renate B Pilz, Sari B Mahon, Matthew Brenner, Gerry R Boss
STUDY OBJECTIVE: The 2 antidotes for acute cyanide poisoning in the United States must be administered by intravenous injection. In the out-of-hospital setting, intravenous injection is not practical, particularly for mass casualties, and intramuscular injection would be preferred. The purpose of this study is to determine whether sodium nitrite and sodium thiosulfate are effective cyanide antidotes when administered by intramuscular injection. METHODS: We used a randomized, nonblinded, parallel-group study design in 3 mammalian models: cyanide gas inhalation in mice, with treatment postexposure; intravenous sodium cyanide infusion in rabbits, with severe hypotension as the trigger for treatment; and intravenous potassium cyanide infusion in pigs, with apnea as the trigger for treatment...
December 29, 2016: Annals of Emergency Medicine
https://www.readbyqxmd.com/read/28027835/toward-nitrogen-14-nuclear-quadrupole-resonance-imaging-by-nutation-experiments-performed-with-a-radio-frequency-field-gradient
#4
Sarra Aissani, Laouès Guendouz, Pierre-Louis Marande, Daniel Canet
Until now, NQR imaging has been considered mainly in the case of Chlorine-35. This is a spin 3/2 resonating at relatively high frequency (around 30MHz) thus affording a favorable sensitivity. Conversely, Nitrogen-14 (spin 1) NQR is much less sensitive because its resonances frequencies are below 6MHz. In contrast to already existing methodologies for object localization by (14)N NQR, we present here a new, more straightforward, approach and the principles of space dependent (14)N Quadrupole Resonance are laid down...
December 16, 2016: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/28017995/effect-of-partial-substitution-of-nacl-by-kcl-on-physicochemical-properties-biogenic-amines-and-n-nitrosamines-during-ripening-and-storage-of-dry-cured-bacon
#5
Feng Li, Hong Zhuang, Weiwei Qiao, Jianhao Zhang, Yongli Wang
Effects of three salting treatments (Formulation II: 80 % NaCl + 20 % KCl; Formulation III: 60 % NaCl + 40 % KCl and Formulation IV: 40 % NaCl + 60 % KCl) on physicochemical properties, residual nitrite, N-nitrosamines and biogenic amines were compared with those of control bacons (Formulation I: 100 % NaCl) during processing and storage. Results showed that there were no significant differences among treatments for moisture, pH, and total volatile basic nitrogen (TVBN) content in dry-cured bacons during processing...
October 2016: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28017872/nitrite-derived-nitric-oxide-reduces-hypoxia-inducible-factor-1%C3%AE-mediated-extracellular-vesicle-production-by-endothelial-cells
#6
Nicholas Burnley-Hall, Gareth Willis, Jessica Davis, D Aled Rees, Philip E James
INTRODUCTION: Extracellular vesicles (EVs) are small, spherical particles enclosed by a phospholipid bilayer (∼30-1000 nm) released from multiple cell types, and have been shown to have pathophysiological roles in a plethora of disease states. The transcription factor hypoxia-inducible factor-1 (HIF-1) allows for adaptation of cellular physiology in hypoxia and may permit the enhanced release of EVs under such conditions. Nitric oxide (NO) plays a pivotal role in vascular homeostasis, and can modulate the cellular response to hypoxia by preventing HIF-1 accumulation...
December 23, 2016: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28010842/ultra-sensitive-hplc-photochemical-reaction-luminol-chemiluminescence-method-for-the-measurement-of-secondary-amines-after-nitrosation
#7
Hitoshi Kodamatani, Yoshimi Iwaya, Makoto Saga, Keiitsu Saito, Takahiro Fujioka, Shigeo Yamazaki, Ryo Kanzaki, Takashi Tomiyasu
A novel method for the determination of secondary amines at the nanomolar level was developed. The method is based on the nitrosation reaction of secondary amines, with the generated N-nitrosamines being measured using an HPLC separation, photochemical reaction, and chemiluminescence detection system. The efficient nitrosation of secondary amines was performed using sodium nitrite (200 mM) and acetic acid (0.8 M) at 80 °C over 60 min. Although compounds bearing OH and SH functional groups also underwent the nitrosation reaction, the sensitivity of these compounds was 1000 times lower than that of the secondary amines...
February 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28000380/quercetin-inhibits-sodium-nitrite-induced-inflammation-and-apoptosis-in-different-rats-organs-by-suppressing-bax-hif1-%C3%AE-tgf-%C3%AE-smad-2-and-akt-pathways
#8
Nouf Mohamed Al-Rasheed, Laila Mohamed Fadda, Hala A Attia, Hanaa Mahmoud Ali, Nawal Mohamed Al-Rasheed
The objective of this work is to study the protective effects of Quercetin against sodium nitrite-induced hypoxia on liver, lung, kidney and cardiac tissues, also to explore novel mechanism of this compound. Male albino rats were injected with sodium nitrite (75 mg/kg). Quercetin (200 mg kg(-1) ,- i.p.) was administrated 24 and 1 h respectively prior to sodium nitrite intoxication, hypoxia significantly decreased hemoglobin concentration, while increased expressions of HIF, Bax, Smad-2, TGF-β, and AKT...
December 21, 2016: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/27989818/the-binuclear-form-of-dinitrosyl-iron-complexes-with-thiol-containing-ligands-in-animal-tissues
#9
Vasak D Mikoyan, Evgeniya N Burgova, Rostislav R Borodulin, Anatoly F Vanin
It has been established that treatment of mice with sodium nitrite, S-nitrosoglutathione and the water-soluble nitroglycerine derivative isosorbide dinitrate (ISDN) as NO donors initiates in vivo synthesis of significant amounts of EPR-silent binuclear dinitrosyl iron complexes (B-DNIC) with thiol-containing ligands in the liver and other tissues of experimental mice. This effect is especially apparent if NO donors are administered to mice simultaneously with the Fe(2+)-citrate complex. Similar results were obtained in experiments on isolated liver and other mouse tissues treated with gaseous NО in vitro and during stimulation of endogenous NO synthesis in the presence of inducible NO synthase...
January 30, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/27980245/synthesis-and-characterization-of-8-nitroguanosine-3-5-cyclic-monophosphorothioate-rp-isomer-as-a-potent-inhibitor-of-protein-kinase-g1%C3%AE
#10
Khandaker Ahtesham Ahmed, Tianli Zhang, Katsuhiko Ono, Hiroyasu Tsutsuki, Tomoaki Ida, Soichiro Akashi, Keishi Miyata, Yuichi Oike, Takaaki Akaike, Tomohiro Sawa
Guanosine 3',5'-cyclic monophosphate (cGMP)-dependent protein kinases (PKG) are kinases regulating diverse physiological functions including vascular smooth muscle relaxation, neuronal synaptic plasticity, and platelet activities. Certain PKG inhibitors, such as Rp-diastereomers of derivatives of guanosine 3',5'-cyclic monophosphorothioate (Rp-cGMPS), have been designed and used to study PKG-regulated cell signaling. 8-Nitroguanosine 3',5'-cyclic monophosphate (8-nitro-cGMP) is an endogenous cGMP derivative formed as a result of excess production of reactive oxygen species and nitric oxide...
December 16, 2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27951499/degradation-of-nitro-aromatic-explosives-using-recyclable-magnetic-photocatalyst-catalyst-synthesis-and-process-optimization
#11
Hadi Rezaei-Vahidian, Ali Reza Zarei, Ali Reza Soleymani
In this research, degradation of P-Nitrophenol (PNP) as a model nitro-aromatic compound was carried out by photocatalytic process using magnetic Titania nano particles (MTNPs). The recyclable MTNPs were synthesized with average diameter of 22nm and a narrow size distribution. The process was modeled and optimized by a second order reduced polynomial model. Based on the model prediction, the process can be degraded PNP up to 90% under the optimum conditions of the initial pH=4, [PNP]=15mgL(-1), [MTNPs]=85mgL(-1), and T=25°C...
March 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27941593/low-dose-sodium-nitrite-fluid-resuscitation-prevents-lethality-from-crush-syndrome-by-improving-nitric-oxide-consumption-and-preventing-myoglobin-cytotoxicity-in-kidney-in-a-rat-model
#12
Isamu Murata, Yumi Miyake, Naomi Takahashi, Ryuta Suzuki, Takayuki Fujiwara, Yuji Sato, Yutaka Inoe, Jun Kobayashi, Ikuo Kanamoto
OBJECTIVE: Crush syndrome (CS) is a serious medical condition characterized by muscle cell damage resulting from pressure. CS has a high mortality, even when patients receive fluid therapy. We examined whether administration of NaNO2-containing fluid can improve survival in a rat model of CS. DESIGN: The CS model was generated by subjecting anesthetized rats to bilateral hind limb compression with a rubber tourniquet for 5 h. Rats were then randomly divided into six groups: (i) sham; (ii) CS with no treatment; (iii) CS with normal saline treatment; (iv) CS with normal saline + 25 mEq/L bicarbonate treatment; and (v and vi) CS with normal saline + 200 or 500 μmol/kg NaNO2...
December 9, 2016: Shock
https://www.readbyqxmd.com/read/27931689/rapid-drug-susceptibility-testing-of-mycobacterium-tuberculosis-clinical-isolates-to-first-line-antitubercular-drugs-by-nitrate-reductase-assay-a-comparison-with-proportion-method
#13
Amrish Kohli, Gulnaz Bashir, Akeela Fatima, Abiroo Jan, Nayeem-U-Din Wani, Junaid Ahmad
OBJECTIVE/BACKGROUND: Early initiation of therapy in patients with tuberculosis is imperative for its control. Conventional methods of susceptibility testing such as the proportion method (PM) require visual detection and counting of colonies that takes up to 6weeks. Rapid and simple phenotypic methods that have been endorsed by the World Health Organization can serve as alternatives. METHODS: In this study, we evaluated the colorimetric nitrate reductase assay, which utilizes the detection of nitrate reduction as an indicator of growth much earlier compared with PM (within 7-14days)...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27930713/detecting-methemoglobinemia-in-animals-with-a-drop-of-blood
#14
Toni G Patton, Stephen L Blamer, Katherine E Horak
A major concern during pesticide development and use is the impact on non-target species, such as raptors or domestic cats and dogs. Sodium nitrite and para-aminopropiophenone (PAPP) are two toxicants currently being studied for the control of invasive species, such as starlings and feral swine. When given to an animal these compounds oxidize hemoglobin, which renders it unable to carry oxygen resulting in methemoglobinemia. This study developed a method to estimate methemoglobin levels in mammals and birds by examining the efficacy of sodium nitrite to induce the conversion of hemoglobin to methemoglobin...
2016: PloS One
https://www.readbyqxmd.com/read/27905382/-complexes-of-nitric-oxide-with-hemoglobin-and-paramagnetic-metalloenzymes-in-the-brain-and-blood-of-mammals-after-intermittent-hypoxia
#15
Z V Kuropteva, V P Reutov, L M Baider, A L Krushinsky
AIM: To investigate an effect of hypoxia on the formation of nitric oxide (NO) in the brain and blood of rats and an influence of L-NNA, the NO-synthase inhibitor, and sodium nitrite on NO generation in separate and simultaneous introduction of these compounds in the animal body. MATERIAL AND METHODS: Experiments were conducted on 42 rats of Krushinsky-Molodkina (K-M) line without adaptation to hypoxia and short-term adaptation to hypobaric hypoxia. Animals were intraperitoneally injected with sodium nitrite (0...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27901641/light-triggered-selective-nitration-of-psbo1-in-isolated-arabidopsis-thylakoid-membranes-is-inhibited-by-photosynthetic-electron-transport-inhibitors
#16
Misa Takahashi, Jun Shigeto, Atsushi Sakamoto, Hiromichi Morikawa
PsbO1 is exclusively nitrated when isolated thylakoid membranes are incubated in a buffer bubbled with nitrogen dioxide (NO2) containing NO2 and nitrite. NO2 is the primary intermediate for this selective nitration. Isolated thylakoid membranes were incubated in NO2-bubbled buffer at 25°C in the light or dark. Protein analysis confirmed the selective nitration of PsbO1. Illumination was found to be essential in PsbO1 nitration. A nitration mechanism whereby nitratable tyrosine residues of PsbO1 are, prior to nitration, selectively photo-oxidized by photosynthetic electron transport to tyrosyl radicals to combine with NO2 to form 3-nitrotyrosine was hypothesized...
December 2016: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/27857537/changes-in-the-physico-chemical-and-microbial-quality-during-the-production-of-past%C3%A4-rma-cured-with-different-levels-of-sodium-nitrite
#17
Muhammet Irfan Aksu, Ebru Erdemir, Neslihan Çakıcı
Pastırma, a dry-cured meat product, is produced from the whole muscle and/or muscles obtained from certain parts of beef and water buffalo carcasses. The purpose of this study was to determine the effects of different levels of sodium nitrite on changes in the physicochemical and microbial quality during the production of pastırma. The changes in residual nitrite, salt, pH, moisture, thiobarbutiric acid reactive substances (TBARS), colour (L*, a*, b*), total aerobic mesophilic bacteria (TAMB), lactic acid bacteria (LAB), Micrococcus/Staphylococcus (M/S), mould-yeast (M-Y), and Enterobacteriaceae counts of pastırma with 0, 50, 100 and 150 ppm sodium nitrite were determined during the production...
October 31, 2016: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/27849257/effects-of-nitrate-intake-on-myocardial-ischemia-reperfusion-injury-in-diabetic-rats
#18
Sajad Jeddi, Saeedeh Khalifi, Mahboubeh Ghanbari, Fatemeh Bageripour, Asghar Ghasemi
BACKGROUND: Coronary artery disease is 2-3 times more common in diabetic individuals. Dietary nitrate/nitrite has beneficial effects in both diabetes and cardiovascular disease. It also has protective effects against myocardial ischemia-reperfusion (IR) injury in healthy animals. However, the effects of nitrate on myocardial IR injury in diabetic rats have not yet been investigated. OBJECTIVE: We examined the effects of dietary nitrate on myocardial IR injury in streptozotocin-nicotinamide-induced diabetic rats...
October 2016: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/27847239/control-of-dimethyl-sulfide-and-dimethyl-disulfide-odors-during-pig-manure-composting-using-nitrogen-amendment
#19
Bing Zang, Shuyan Li, Frederick C Michel, Guoxue Li, Difang Zhang, Yangyang Li
Effects of nitrogen electron acceptors on dimethyl sulfide (Me2S) and dimethyl disulfide (Me2SS) odor emission during composting was investigated. The chemicals and doses used included sodium nitrate (NO3(-) at 10mM, 20mM and 40mM), sodium nitrite (NO2(-) at 10mM, 20mM and 40mM) and sodium nitrite (10mM, 20mM and 40mM) with hexaammonium heptamolybdate tetrahydrate (HHT). The results showed that the addition of these chemicals restricted the emission of Me2S and Me2SS. The emission reduction effect of NO2(-) was greater than NO3(-) at the same dosage...
January 2017: Bioresource Technology
https://www.readbyqxmd.com/read/27834492/single-and-combined-effects-of-beetroot-crystals-and-sodium-bicarbonate-on-4-km-cycling-time-trial-performance
#20
Marcus J Callahan, Evelyn B Parr, John A Hawley, Louise M Burke
When ingested alone, beetroot juice and sodium bicarbonate are ergogenic for high-intensity exercise performance. This study sought to determine the independent and combined effects of these supplements. Eight endurance trained (V̇O2max 65 mL·kg·min(-1)) male cyclists completed four x 4-km time trials (TT) in a double-blind Latin square design supplementing with beetroot crystals (BC) for 3 days (15 g.day(-1) + 15 g 1 h prior to TT, containing 300 mg nitrate per 15 g), bicarbonate (Bi 0.3 g·kg(-1) body mass [BM] in 5 doses every 15 min from 2...
November 11, 2016: International Journal of Sport Nutrition and Exercise Metabolism
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