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Carbon monoxide

Saeideh Tasharrofi, Hossein Taghdisian, Abdollah Golchoobi
In this study, pure and ternary adsorption of hydrogen sulfide (H2 S), ethylbenzene (EB), and carbon monoxide (CO) on different arrays of zigzag double wall carbon nanotube was investigated using grand canonical Monte Carlo simulations. The internal diameters of nanotube were fixed at 2r = 50.17 Å while nanotube wall distances were different values from d = 0 Å to d = 150 Å. Pure simulation results indicated that adsorption quantity of H2 S and EB in low pressure ranges of P = 1.9 bar to P = 3...
March 2, 2018: Journal of Molecular Graphics & Modelling
Maryam Dastoorpoor, Gholamreza Goudarzi, Narges Khanjani, Esmaeil Idani, Hamidreza Aghababaeian, Abbas Bahrampour
OBJECTIVES: There are few studies about the association between breathing polluted air and increased risk of cardiovascular diseases and cardiac death in the Middle East. This study aimed to investigate the relation between air pollutants and cardiovascular mortality (based on ICD-10) in Ahvaz. MATERIAL AND METHODS: In this ecological study, the data about cardiovascular disease mortality and air pollutants from March 2008 until March 2015 was inquired from the Ahvaz City Authority and the Khuzestan Province Environmental Protection Agency...
March 15, 2018: International Journal of Occupational Medicine and Environmental Health
M Snaterse, J W Deckers, M J Lenzen, H T Jorstad, D De Bacquer, R J G Peters, C Jennings, K Kotseva, W J M Scholte Op Reimer
OBJECTIVE: We investigated smoking cessation rates in coronary heart disease (CHD) patients throughout Europe; current and as compared to earlier EUROASPIRE surveys, and we studied characteristics of successful quitters. METHODS: Analyses were done on 7998 patients from the EUROASPIRE-IV survey admitted for myocardial infarction, unstable angina and coronary revascularisation. Self-reported smoking status was validated by measuring carbon monoxide in exhaled air...
May 1, 2018: International Journal of Cardiology
Yu Hang Li, Ling Cheng, Peng Fei Liu, Le Zhang, Meng Yang Zu, Chong Wu Wang, Yan Huan Jin, Xiao Ming Cao, Huagui Yang, Chunzhong Li
Electrocatalytic reduction of carbon dioxide (CO2) to carbon monoxide (CO) is the first step in carbon-based fuels synthesis and feedstocks using renewable electricity. Although molybdenum or tungsten based compounds can efficiently catalyze this reaction, they generally require the costly ionic liquid as electrolyte, making it essential to find a suitable compound substitute to achieve CO2 reduction with high selectivity in aqueous medium. Here we demonstrate a simple cadmium sulfide as an efficient and stable electrocatalyst for CO2 reduction in aqueous medium for more than 40 hours with a steady CO Faradaic efficiency of ca...
March 14, 2018: ChemSusChem
Kaoru Ohno, Kazuaki Kuwahata
In order to investigate a hydrogenation reaction of carbon monoxide (H + CO → HCO), which is important in interstellar clouds, we perform density functional calculations and find that the activation energy of the reaction on amorphous ice is lower than that on crystalline ice. In the course of this study, we demonstrate that it is roughly possible to use the excitation energy of the reactant molecule (CO) in place of the activation energy. This relationship holds also for small water clusters at the CCSD level calculation and the 2-layer level ONIOM(CCSD:X3LYP) calculation...
March 14, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
Hashmat Ghanizada, Nanna Arngrim, Henrik Winther Schytz, Jes Olesen, Messoud Ashina
Introduction Carbon monoxide is an endogenously produced signaling gasotransmitter known to cause headache and vasodilation. We hypothesized that inhalation of carbon monoxide would induce migraine-like attacks in migraine without aura patients. Methods In a randomized, double-blind, placebo-controlled crossover design, 12 migraine patients were allocated to inhalation of carbon monoxide (carboxyhemoglobin 22%) or placebo on two separate days. Headache and migraine characteristics were recorded during hospital (0-2 hours) and post-hospital (2-13 hours) phases...
January 1, 2018: Cephalalgia: An International Journal of Headache
David H Jang, Utsha G Khatri, Anita Mudan, Jennifer S Love, Shawn Owiredu, David M Eckmann
It is conservatively estimated that 5,000 deaths per year and 20,000 injuries in the USA are due to poisonings caused by chemical exposures (e.g., carbon monoxide, cyanide, hydrogen sulfide, phosphides) that are cellular inhibitors. These chemical agents result in mitochondrial inhibition resulting in cardiac arrest and/or shock. These cellular inhibitors have multi-organ effects, but cardiovascular collapse is the primary cause of death marked by hypotension, lactic acidosis, and cardiac arrest. The mitochondria play a central role in cellular metabolism where oxygen consumption through the electron transport system is tightly coupled to ATP production and regulated by metabolic demands...
March 13, 2018: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
Sutapa Mukhopadhyay, Annie Hirsch, Suze Etienne, Natalia Melnikova, Jennifer Wu, Kanta Sircar, Maureen Orr
BACKGROUND: Carbon monoxide (CO) is an insidious gas responsible for approximately 21,000 emergency department visits, 2300 hospitalizations, and 500 deaths in the United States annually. We analyzed 10 combined years of data from two Agency for Toxic Substances and Disease Registry acute hazardous substance release surveillance programs to evaluate CO incident-related injuries. METHODS: Seventeen states participated in these programs during 2005-2014. RESULTS: In those 10years, the states identified 1795 CO incidents...
February 13, 2018: American Journal of Emergency Medicine
Hang Qiu, Kun Tan, Feiyu Long, Liya Wang, Haiyan Yu, Ren Deng, Hu Long, Yanlong Zhang, Jingping Pan
Evidence on the burden of chronic obstructive pulmonary disease (COPD) morbidity attributable to the interaction between ambient air pollution and temperature has been limited. This study aimed to examine the modification effect of temperature on the association of ambient air pollutants (including particulate matter (PM) with aerodynamic diameter <10 μm (PM10 ) and <2.5 μm (PM2.5 ), nitrogen dioxide (NO₂), sulfur dioxide (SO₂), carbon monoxide (CO) and ozone (O₃)) with risk of hospital admissions (HAs) for COPD, as well as the associated morbidity burden in urban areas of Chengdu, China, from 2015 to 2016...
March 11, 2018: International Journal of Environmental Research and Public Health
Sarah Schatschneider, Salah Abdelrazig, Laudina Safo, Anne Meint Henstra, Thomas Millat, Dong-Hyun Kim, Klaus Winzer, Nigel Peter Minton, David A Barrett
We have investigated the applicability of commercially available lyophilised Spirulina ( Arthrospira platensis), a microorganism uniformly labelled with13 C, as a readily accessible source of multiple13 C-labelled metabolites suitable as internal standards for quantitative determination of intracellular bacterial metabolites. Metabolites of interest were analysed by hydrophilic interaction liquid chromatography coupled with high resolution mass spectrometry. Multiple internal standards obtained from uniformly (U)-13 C-labelled extract from Spirulina were used to enable isotope dilution mass spectrometry (IDMS) for the identification and quantification of the intracellular metabolites...
March 13, 2018: Analytical Chemistry
Vinod K Bhutani, M Jeffrey Maisels, David L Schutzman, Martin E Castillo Cuadrado, Janelle L Aby, Debra L Bogen, Robert D Christensen, Jon F Watchko, Ronald J Wong, David K Stevenson
AIM: To identify neonates at risk for haemolytic hyperbilirubinaemia through near-concurrrent measurements of total serum/plasma bilirubin (TB) or transcutaneous bilirubin (TcB) and end-tidal breath carbon monoxide (CO), corrected for ambient CO (ETCOc), an index of bilirubin production and haemolysis. METHODS: Paired TB/TcB (mg/dL) and ETCOc (ppm) measurements were obtained in newborns (n=283) at 20 to <60h of age in five nurseries. TB/TcB values were assigned TB/TcB percentile risk using the Bhutani hour-specific nomogram...
March 13, 2018: Acta Paediatrica
Wei Du, Xinyue Li, Yuanchen Chen, Guofeng Shen
Solid fuels, an important source of severe Household Air Pollution (HAP) linked to many adverse health outcomes, has been widely consumed around the world. China consumes large amounts of solid fuels and suffers from serious indoor and outdoor air pollution. Though global HAP issues had been reviewed in previous literatures, peer-reviewed Chinese publications were seldom included in those reviews. We conducted a literature review on the studies of HAP and personal exposure in rural China with inputs from peer-reviewed publications in both English and Chinese...
March 8, 2018: Environmental Pollution
June Lee, Karabasappa Mailar, Ok-Kyung Yoo, Won Jun Choi, Young-Sam Keum
Heme oxygenase-1 (HO-1) catalyzes the enzymatic degradation of heme to produce three anti-oxidant molecules: carbon monoxide (CO), ferrous ion (Fe2+ ), and biliverdin. Induction of HO-1 is currently considered as a feasible strategy to treat oxidative stress-related diseases. In the present study, we identified marliolide as a novel inducer of HO-1 in human normal keratinocyte HaCaT cells. Mechanism-based studies demonstrated that the induction of HO-1 by marliolide occurred through activation of NRF2/ARE via direct binding of marliolide to KEAP1...
February 23, 2018: European Journal of Medicinal Chemistry
Seong Ji Park, Seung Koo Lee, Chae Rin Lim, Hye Won Park, Fang Liu, Seong-Jin Kim, Byung-Chul Kim
Heme oxygenase-1 (HO-1) has been implicated in tumor progression, but the underlying molecular mechanisms remain largely unknown. Transforming growth factor-β1 (TGF-β1) exhibits cytostatic and apoptotic effects in hepatocytes and several types of hepatocellular carcinoma (HCC) cell lines, and deregulation of its signaling pathway is linked to hepatic tumorigenesis. In the present study, we observed that HO-1 is expressed at higher levels in HCC tissues than in paired normal tissues. Moreover, TGF-β1-induced cell cycle arrest and up-regulation of cyclin-dependent kinase inhibitors in HCC cell lines were significantly attenuated by overexpression of HO-1 or treatment with tricarbonyldichlororuthenium(II) dimer ([Ru(CO)3 Cl2 ]2 , suggesting an inhibitory role of the HO-1/CO axis in TGF-β signaling to growth inhibition in HCC cell lines...
March 7, 2018: Biochemical and Biophysical Research Communications
Amelia Nathania Dong, Yan Pan, Uma Devi Palanisamy, Beow Chin Yiap, Nafees Ahemad, Chin Eng Ong
Genetic polymorphism of the cytochrome P450 (CYP) genes particularly affects CYP2D6 and CYP2C19 to a functionally relevant extent, and it is therefore crucial to elucidate the enzyme kinetic and molecular basis for altered catalytic activity of these allelic variants. This study explored the expression and function of the reported alleles CYP2D6*2, CYP2D6*10, CYP2D6*17, CYP2C19*23, CYP2C19*24, and CYP2C19*25 with respect to gene polymorphisms. Site-directed mutagenesis (SDM) was carried out to generate these six alleles...
March 10, 2018: Applied Biochemistry and Biotechnology
E Randy Eichner
No abstract text is available yet for this article.
March 2018: Current Sports Medicine Reports
Haojuan Jia, Jia Shi, Shu'an Dong, Yuan Zhang, Jianbo Yu
OBJECTIVE: To investigate the effects of heme oxygenase-1/carbon monoxide (HO-1/CO) pathway on mitochondrial fusion in rat alveolar epithelial type II cells (AEC II) stimulated by lipopolysaccharide (LPS). METHODS: Once the cultured in vitro rat AEC II cells line RLE-6TN reached confluency of 85%, they were subcultured and randomly divided into seven groups (n = 5 each). RLE-6TN cells were routinely cultured in control group. The cells in LPS group was stimulated with 10 mg/L LPS to reproduce the model of endotoxin challenge in AECII cells...
March 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
John Henry McDermott, Charles Reynard, Jonathan Perry, James W Dear, Fran Child, Rachel Jenner
BACKGROUND: Recent public health strategies have contributed towards a significant reduction in the incidence of carbon monoxide (CO) poisonings. When events do occur, symptoms can vary dramatically depending on the carboxyhaemoglobin level and individual factors. Most reports to date focus on individual cases or larger retrospective reviews of diverse cohorts. There are very few reports of CO exposure related to scuba diving activities. METHODS: We describe the clinical sequelae experienced by 10 children who were exposed to CO during a scuba diving lesson...
March 8, 2018: Clinical Toxicology
Roshan K Dhungana, Shekhar Kc, Prakash Basnet, Ramesh Giri
Transition metal (TM)-catalyzed difunctionalization of unactivated olefins with two carbon-based entities is a powerful method to construct complex molecular architectures rapidly from simple and readily available feedstock chemicals. While dicarbofunctionalization of unactivated olefins has a long history typically with the use of either carbon monoxide to intercept C(sp3 )-[M] (alkyl-TM) species or substrates lacking in β-hydrogen (β-Hs), development of this class of reaction still remains seriously limited due to complications of β-H elimination arising from the in situ-generated C(sp3 )-[M] intermediates...
March 8, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
Syed Fayaz Hashmp, Munavvar Z A Sattar, Hassaan A Rathore, Ashfaq Ahmadi, Edward J Johns
Until recently hydrogen sulfide (H2S) was the least appreciated of the three gasotransmitters but now recognized as 3Y gaseous mediator after nitric oxide(NO) and carbon monoxide (CO). H2S regulates a number of physiological processes like vasorelaxation, prevention of inflammation, leukocyte adhesion, anti-prolifera- tive effects, anti-thrombotic effects, resistance to oxidative stress and protection against ischemia reperfusion injury (IRI). However, considerable amount of research is still needed to evaluate the mechanisms involved in the therapeutic effects of H2S in IRI such as its effects on nuclear factor-kappa B (NF-KB) concentration and intercellular adhesion molecule-1 (ICAM-1) expression in renal IRI and ARF (acute renal failure)...
May 2017: Acta Poloniae Pharmaceutica
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