scholarly journals Nitric oxide monooxygenation (NOM) reaction of cobalt-nitrosyl {Co(NO)}8 to CoII-nitrito {CoII(NO2−)}: base induced hydrogen gas (H2) evolution

2020 ◽  
Vol 11 (19) ◽  
pp. 5037-5042 ◽  
Author(s):  
Sandip Das ◽  
Kulbir ◽  
Somnath Ghosh ◽  
Subash Chandra Sahoo ◽  
Pankaj Kumar
Keyword(s):  
Nitric Oxide ◽  
Hydrogen Gas ◽  
Gas Evolution ◽  
H2 Evolution

Base-induced hydrogen (H2) gas evolution in the nitric oxide monoxygenation reaction.

Breathing nitric oxide plus hydrogen gas reduces ischemia-reperfusion injury and nitrotyrosine production in murine heart

2013 ◽  
Vol 305 (4) ◽  
pp. H542-H550 ◽  
Author(s):  
Toshihiro Shinbo ◽  
Kenichi Kokubo ◽  
Yuri Sato ◽  
Shintaro Hagiri ◽  
Ryuji Hataishi ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Cardiac Function ◽  
Infarct Size ◽  
Ischemia Reperfusion Injury ◽  
Myocardial Dysfunction ◽  
Ischemia Reperfusion ◽  
Neutrophil Infiltration ◽  
Left Ventricular ◽  
Hydrogen Gas ◽  
Coronary Artery Ligation

Inhaled nitric oxide (NO) has been reported to decrease the infarct size in cardiac ischemia-reperfusion (I/R) injury. However, reactive nitrogen species (RNS) produced by NO cause myocardial dysfunction and injury. Because H2 is reported to eliminate peroxynitrite, it was expected to reduce the adverse effects of NO. In mice, left anterior descending coronary artery ligation for 60 min followed by reperfusion was performed with inhaled NO [80 parts per million (ppm)], H2 (2%), or NO + H2, starting 5 min before reperfusion for 35 min. After 24 h, left ventricular function, infarct size, and area at risk (AAR) were assessed. Oxidative stress associated with reactive oxygen species (ROS) was evaluated by staining for 8-hydroxy-2′-deoxyguanosine and 4-hydroxy-2-nonenal, that associated with RNS by staining for nitrotyrosine, and neutrophil infiltration by staining for granulocyte receptor-1. The infarct size/AAR decreased with breathing NO or H2 alone. NO inhalation plus H2 reduced the infarct size/AAR, with significant interaction between the two, reducing ROS and neutrophil infiltration, and improved the cardiac function to normal levels. Although nitrotyrosine staining was prominent after NO inhalation alone, it was eliminated after breathing a mixture of H2 with NO. Preconditioning with NO significantly reduced the infarct size/AAR, but not preconditioning with H2. In conclusion, breathing NO + H2 during I/R reduced the infarct size and maintained cardiac function, and reduced the generation of myocardial nitrotyrosine associated with NO inhalation. Administration of NO + H2 gases for inhalation may be useful for planned coronary interventions or for the treatment of I/R injury.

scholarly journals Hydrogen Gas Evolution from Water-dispersed Titania and Alumina Nanoparticles by γ-Ray Irradiation

RADIOISOTOPES ◽  
2000 ◽  
Vol 49 (7) ◽  
pp. 354-358 ◽  
Author(s):  
Satoshi SEINO ◽  
Ryosuke FUJIMOTO ◽  
Takao YAMAMOTO ◽  
Masahiro KATSURA ◽  
Shuichi OKUDA ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Hydrogen Gas ◽  
Alumina Nanoparticles ◽  
Gas Evolution ◽  
Gamma Ray Irradiation

scholarly journals Comparative Proteomic Analysis during the Involvement of Nitric Oxide in Hydrogen Gas-Improved Postharvest Freshness in Cut Lilies

2018 ◽  
Vol 19 (12) ◽  
pp. 3955 ◽  
Author(s):  
Jianqiang Huo ◽  
Dengjing Huang ◽  
Jing Zhang ◽  
Hua Fang ◽  
Bo Wang ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Atp Synthase ◽  
Hydrogen Gas ◽  
Vase Life ◽  
Photosynthetic Parameters ◽  
Cut Flowers ◽  
Proteomics Analysis ◽  
Physiological Level ◽  
Positive Effects ◽  
The Relationship

Our previous studies suggested that both hydrogen gas (H2) and nitric oxide (NO) could enhance the postharvest freshness of cut flowers. However, the crosstalk of H2 and NO during that process is unknown. Here, cut lilies (Lilium “Manissa”) were used to investigate the relationship between H2 and NO and to identify differentially accumulated proteins during postharvest freshness. The results revealed that 1% hydrogen-rich water (HRW) and 150 μM sodium nitroprusside (SNP) significantly extended the vase life and quality, while NO inhibitors suppressed the positive effects of HRW. Proteomics analysis found 50 differentially accumulated proteins in lilies leaves which were classified into seven functional categories. Among them, ATP synthase CF1 alpha subunit (chloroplast) (AtpA) was up-regulated by HRW and down-regulated by NO inhibitor. The expression level of LlatpA gene was consistent with the result of proteomics analysis. The positive effect of HRW and SNP on ATP synthase activity was inhibited by NO inhibitor. Meanwhile, the physiological-level analysis of chlorophyll fluorescence and photosynthetic parameters also agreed with the expression of AtpA regulated by HRW and SNP. Altogether, our results suggested that NO might be involved in H2-improved freshness of cut lilies, and AtpA protein may play important roles during that process.

scholarly journals Hydrogen Gas Is Involved in Auxin-Induced Lateral Root Formation by Modulating Nitric Oxide Synthesis

2017 ◽  
Vol 18 (10) ◽  
pp. 2084 ◽  
Author(s):  
Zeyu Cao ◽  
Xingliang Duan ◽  
Ping Yao ◽  
Weiti Cui ◽  
Dan Cheng ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Lateral Root ◽  
Root Formation ◽  
Hydrogen Gas ◽  
Lateral Root Formation ◽  
Nitric Oxide Synthesis

Efficient electrocatalytic hydrogen gas evolution by a cobalt–porphyrin-based crystalline polymer

2018 ◽  
Vol 47 (26) ◽  
pp. 8801-8806 ◽  
Author(s):  
Yanyu Wu ◽  
José M. Veleta ◽  
Diya Tang ◽  
Alex D. Price ◽  
Cristian E. Botez ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Aqueous Media ◽  
Crystalline Polymer ◽  
Hydrogen Gas ◽  
Gas Evolution ◽  
Polymeric System ◽  
Cobalt Porphyrin

Herein, we report a crystalline CoTcPP-based [TcPP = the anion of meso-tetra(4-carboxyphenyl)porphyrin] polymeric system, 1, as a hydrogen evolution reaction (HER) electrocatalyst in acidic aqueous media.

Potential Dependence of Hydrogen Embrittlement Susceptibility of Ultra High Strength Low Alloy Steel

2002 ◽  
Author(s):  
Shin-ichi Komazaki ◽  
Rie Maruyama ◽  
Tatsuo Honno ◽  
Toshihei Misawa
Keyword(s):  
Hydrogen Embrittlement ◽  
Alloy Steel ◽  
High Strength ◽  
Hydrogen Gas ◽  
Potential Range ◽  
Gas Evolution ◽  
Adsorbed Hydrogen ◽  
Low Alloy Steel ◽  
Applied Potential ◽  
Potential Region

In order to investigate the susceptibility of the ultra high strength low alloy steel to hydrogen embrittlement, a slow strain rate tensile test was carried out in boric acid-borax buffer aqueous solutions of pH 10 at the potential range from corrosion potential to hydrogen gas evolution potential, including adsorbed hydrogen potential. Experimental results revealed that the susceptibility to hydrogen embrittlement was dependent on the applied potential and increased linearly with increasing applied cathodic potential in the adsorbed hydrogen potential region. On the other hand, in the hydrogen gas evolution potential region, the susceptibility was independent of the applied potential and showed almost no variation. Based on the results obtained, these changes in susceptibility to hydrogen embrittlement with applied potential have been discussed in terms of the variation in reduction behavior of oxide films on the specimen surface.

Hydrogen Gas Evolution from Cathodically Protected Surfaces

CORROSION ◽  
1985 ◽  
Vol 41 (7) ◽  
pp. 389-397 ◽  
Author(s):  
R. N. Parkins ◽  
A. J. Markworth ◽  
J. H. Holbrook ◽  
R. R. Fessler
Keyword(s):  
Hydrogen Gas ◽  
Gas Evolution

An Evaluation of Hydrogen Evolution from Corrosion of Carbon Steel in Low/Intermediate Level Waste Repositories

1994 ◽  
Vol 353 ◽  
Author(s):  
Fumio Matsuda ◽  
Ryutaro Wada ◽  
Kazuo Fujiwara ◽  
Ai Fujiwara
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Hydrogen Evolution ◽  
Hydrogen Gas ◽  
Intermediate Level ◽  
Evolution Rate ◽  
List Type ◽  
Gas Evolution ◽  
Hydrogen Evolution Rate ◽  
Waste Repositories

AbstractAs a sequence of studies to evaluate the quantity of gas evolution from low/intermediate level waste repositories,hydrogen gas evoluted from corrosion of carbon steel in simulated repository environment was evaluated by laboratory experiments. The experimental results on the hydrogen gas evolution both in air purging condition simulated oxidizing environment and nitrogen purging condition simulated reducing environment, are summarized as follows.(1)Hydrogen gas evolution enough to analyze quantitavely by gas chromatography (>5ppm) has been recognized under almost all test conditions except reducing equilibrium cement water.(2)Effects of purging gas (air,nitrogen) on the hydrogen gas evolution and the corrosion rate calculated from weight loss were air purge > nitrogen purge. On the other hand, the contribution ratio of hydrogen evolution reaction in corrosion rate was nitrogen purge > air purge.(3)Effects of test solution on the hydrogen evolution rate were as fo11ows. • Air Purge :Equilibrium Bentonite Water ≈ Equilibrium Cement Water > Synthetic Sea Watert• N2 Purge:Synthetic Sea Water > Equilibrium Bentonite Water >> Equilibrium Cement Water(4)No distinct effect of crevice geometry of test specimen on hydrogen evolution rate was recognized. Only under the reducing equilibrium cement water, however, the increase of hydrogen evolution was confirmed after the immersion of several hundred hours.(5)Hydrogen evolution rates tended to decrease with testing time except in the reducing equilibrium cement water.(6)No distinct difference of hydrogen evolution rate between steels (SPHC, SPCC) was observed.

Sign in / Sign up

Export Citation Format

Share Document