نتایج جستجو برای: اکسیداسیون h2s

تعداد نتایج: 7365  

Journal: :Anesthesiology 2008
Gian Paolo Volpato Robert Searles Binglan Yu Marielle Scherrer-Crosbie Kenneth D Bloch Fumito Ichinose Warren M Zapol

BACKGROUND Breathing hydrogen sulfide (H2S) has been reported to induce a suspended animation-like state with hypothermia and a concomitant metabolic reduction in rodents. However, the impact of H2S breathing on cardiovascular function remains incompletely understood. In this study, the authors investigated the cardiovascular and metabolic effects of inhaled H2S in a murine model. METHODS The...

2016
Xu Cao Jin-Song Bian

Hydrogen sulfide has gained recognition as the third gaseous signaling molecule after nitric oxide and carbon monoxide. This review surveys the emerging role of H2S in mammalian renal system, with emphasis on both renal physiology and diseases. H2S is produced redundantly by four pathways in kidney, indicating the abundance of this gaseous molecule in the organ. In physiological conditions, H2S...

2011
Katja Wagner Michael Georgieff Pierre Asfar Enrico Calzia Markus W Knöferl Peter Radermacher

Whether the hydrogen sulfide (H2S)-induced metabolic depression observed in awake rodents exists in larger species is controversial. Therefore, Derwall and colleagues exposed anesthetized and ventilated sheep to incremental H2S concentrations by means of an extracorporeal membrane oxygenator. H2S caused pulmonary vasoconstriction and metabolic acidosis at the highest concentration studied. Oxyg...

2017
Chun-tao Yang Li Chen Shi Xu Jacob J. Day Xiang Li Ming Xian

As an important endogenous gaseous signaling molecule, hydrogen sulfide (H2S) exerts various effects in the body. A variety of pathological changes, such as cancer, glycometabolic disorders, and diabetes, are associated with altered endogenous levels of H2S, especially decreased. Therefore, the supplement of H2S is of great significance for the treatment of diseases containing the above patholo...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1996
K Abe H Kimura

Hydrogen sulfide (H2S), which is well known as a toxic gas, is produced endogenously from L-cysteine in mammalian tissues. H2S is present at relatively high levels in the brain, suggesting that it has a physiological function. Two other gases, nitric oxide and carbon monoxide, are also endogenously produced and have been proposed as neuronal messengers in the brain. In this work we show the fol...

2014
R. Li C. Warneke M. Graus R. Field F. Geiger P. R. Veres J. Soltis S.-M. Li S. M. Murphy C. Sweeney G. Pétron J. M. Roberts J. de Gouw

Natural gas production is associated with emissions of several trace gases, some of them classified as air toxics. While volatile organic compounds (VOCs) have received much attention, hydrogen sulfide (H2S) can also be of concern due to the known health impacts of exposure to this hazardous air pollutant. Here, we present quantitative, fast time-response measurements of H2S using protontransfe...

2014
Rebecca M. Dyson Hannah K. Palliser Joanna L. Latter Grazyna Chwatko Rafal Glowacki Ian M. R. Wright

Excessive vasodilatation during the perinatal period is associated with cardiorespiratory instability in preterm neonates. Little evidence of the mechanisms controlling microvascular tone during circulatory transition exists. We hypothesised that hydrogen sulphide (H2S), an important regulator of microvascular reactivity and central cardiac function in adults and animal models, may contribute t...

Journal: :Applied and environmental microbiology 1992
K S Cho M Hirai M Shoda

Xanthomonas sp. strain DY44, capable of degrading H2S, was isolated from dimethyl disulfide-acclimated peat. This bacterium removed H2S either as a single gas or in the presence of the sulfur-containing compounds methanethiol, dimethyl sulfide, and dimethyl disulfide. The maximum specific H2S removal rate, obtained in the late stationary phase, was 3.92 mmol g of dry cells-1 h-1 (6.7 x 10(-16) ...

2017
Ping Jiang Zhishen Xu Baiquan Xiao Zhong Han Jiehong Huang Jianbang Xu Zhaorong Lun Wenliang Zhou

Hydrogen sulfide (H2S) has anti‑inflammatory and neuroprotective properties, particularly during pathological processes. Experimental cerebral malaria (ECM), which is caused by vascular leakage into the brain, is characterized by inflammation, neurological deficits and cerebral hemorrhage. The present study investigated the correlation between ECM genesis and the levels of H2S. The results indi...

2016
Ervice Pouokam Mike Althaus

Hydrogen sulfide (H2S) is a well-known environmental chemical threat with an unpleasant smell of rotten eggs. Aside from the established toxic effects of high-dose H2S, research over the past decade revealed that cells endogenously produce small amounts of H2S with physiological functions. H2S has therefore been classified as a "gasotransmitter." A major challenge for cells and tissues is the m...

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