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Hydrogen sulfide

Zongmin Zheng, Lele Lin, Shiguang Mo, Daohui Ou, Jing Tao, Ruixuan Qin, Xiaoliang Fang, Nanfeng Zheng
2D layered metal hydroxides (LMH) are promising materials for electrochemical energy conversion and storage. Compared with exfoliation of bulk layered materials, wet chemistry synthesis of 2D LMH materials under mild conditions still remains a big challenge. Here, an "MgO-mediated strategy" for mass production of various 2D LMH nanosheets is presented by hydrolyzing MgO in metal salt aqueous solutions at room temperature. Benefiting from this economical and scalable strategy, ultrathin LMH nanosheets (M = Ni, Fe, Co, NiFe, and NiCo) and their derivatives (e...
May 17, 2018: Small
Seung-Min Hong, Hyuk-Joon Kwon, Se-Joon Park, Won-Jin Seong, Ilhwan Kim, Jae-Hong Kim
The yeast strain SJP-SNU was investigated as a probiotic and was characterized with respect to growth temperature, bile salt resistance, hydrogen sulfide reducing activity, intestinal survival ability and chicken embryo pathogenicity. In addition, we determined the complete genomic and mitochondrial sequences of SJP-SNU and conducted comparative genomics analyses. SJP-SNU grew rapidly at 37 °C and formed colonies on MacConkey agar containing bile salt. SJP-SNU reduced hydrogen sulfide produced by Salmonella serotype Enteritidis and, after being fed to 4-week-old chickens, could be isolated from cecal feces...
May 17, 2018: AMB Express
Feng Ju, Yubo Wang, Tong Zhang
Background: Methanogenic biodegradation of aromatic compounds depends on syntrophic metabolism. However, metabolic enzymes and pathways of uncultured microorganisms and their ecological interactions with methanogenic consortia are unknown because of their resistance to isolation and limited genomic information. Results: Genome-resolved metagenomics approaches were used to reconstruct and dissect 23 prokaryotic genomes from 37 and 20 °C methanogenic phenol-degrading reactors...
2018: Biotechnology for Biofuels
Xiufang Zhou, Si Tang, Ke Hu, Zhan Zhang, Pei Liu, Yuchuan Luo, Jing Kang, Lifang Xu
BACKGROUND: Chronic intermittent hypoxia (CIH), an important basis of the pathogenesis of organ damage induced by obstructive sleep apnea syndrome (OSAS), is associated with myocardial injury, such as left ventricular dysfunction, apoptosis, and oxidative stress. Endogenous hydrogen sulfide (H2 S) plays an important role in maintaining cardiovascular functions. Many studies have demonstrated that exogenous H2 S has protective effects against myocardial injury induced by various cardiovascular diseases, and inhibiting the generation of endogenous H2 S has opposite effects...
May 16, 2018: Sleep & Breathing, Schlaf & Atmung
Giantommaso Scarascia, Scott A Yap, Anna H Kaksonen, Pei-Ying Hong
Pseudomonas aeruginosa is a ubiquitous member of marine biofilm, and reduces thiosulfate to produce toxic hydrogen sulfide gas. In this study, lytic bacteriophages were isolated and applied to inhibit the growth of P. aeruginosa in planktonic mode at different temperature, pH, and salinity. Bacteriophages showed optimal infectivity at a multiplicity of infection of 10 in saline conditions, and demonstrated lytic abilities over all tested temperature (25, 30, 37, and 45°C) and pH 6-9. Planktonic P. aeruginosa exhibited significantly longer lag phase and lower specific growth rates upon exposure to bacteriophages...
2018: Frontiers in Microbiology
Valentina Vellecco, Chiara Armogida, Mariarosaria Bucci
The presence of H2 S pathway in skeletal muscle (SKM) has been recently established. SKM expresses the three constitutive H2 S generating enzymes in animals and humans and it actively produces H2 S. The main recognized molecular targets of H2 S, i.e. potassium channels and phosphodiesterases, have been evaluated in SKM physiology in order to hypothesize a role for H2 S signaling. SKM dysfunctions, including muscular dystrophy and malignant hyperthermia, have been also evaluated as conditions in which H2 S-pathway and the trans-sulfuration pathway have been suggested to be involved...
May 16, 2018: British Journal of Pharmacology
Dong-Ha Kim, Ji-Soo Jang, Won-Tae Koo, Seon-Jin Choi, Hee-Jin Cho, Min-Hyeok Kim, Sang-Joon Kim, Il-Doo Kim
Herein, we incorporated dual bio-templates, i.e., cellulose nanocrystals (CNC) and apoferritin into electrospinning solution to achieve three distinct benefits, i.e., (i) facile synthesis of WO3 nanotube by utilizing self-agglomerating nature of CNC in the core of as-spun nanofibers, (ii) effective sensitization by partial phase transition from WO3 to Na2W4O13 induced by interaction between sodium doped CNC and WO3 during calcination, and (iii) uniform functionalization with monodispersive apoferritin-derived Pt catalytic nanoparticles (2...
May 15, 2018: ACS Sensors
Patricia Oliveira de Lima, Bruno Dias Nani, Barbara Almeida, Fernanda Klein Marcondes, Francisco Carlos Groppo, Antonio Bento Alves de Moraes, Michelle Franz-Montan, Karina Cogo-Müller
OBJECTIVE: To determine whether stress-related substances and sex hormones influence the growth and in vitro production of volatile sulfur compounds (VSCs) by Solobacterium moorei and Fusobacterium nucleatum. MATERIALS AND METHODS: Bacteria growth and VSCs production were evaluated in the presence of alpha-amylase, beta-defensin-2, mucin, estradiol, and progesterone. Growth was evaluated by colony counting, and the production of the VSCs hydrogen sulfide (H2 S) and methyl mercaptan (CH3 SH) was measured using the Oral Chroma™ instrument...
May 15, 2018: Oral Diseases
Da Zhang, Xiuli Wang, Xiaoyu Tian, Lulu Zhang, Guosheng Yang, Yinghong Tao, Chen Liang, Kun Li, Xiaoqi Yu, Xinjing Tang, Chaoshu Tang, Jing Zhou, Wei Kong, Junbao Du, Yaqian Huang, Hongfang Jin
Endogenous hydrogen sulfide (H2 S) and sulfur dioxide (SO2 ) are regarded as important regulators to control endothelial cell function and protect endothelial cell against various injuries. In our present study, we aimed to investigate the effect of endogenous H2 S on the SO2 generation in the endothelial cells and explore its significance in the endothelial inflammation in vitro and in vivo . The human umbilical vein endothelial cell (HUVEC) line (EA.hy926), primary HUVECs, primary rat pulmonary artery endothelial cells (RPAECs), and purified aspartate aminotransferase (AAT) protein from pig heart were used for in vitro experiments...
2018: Frontiers in Immunology
Yasuhito Suzuki, Junpei Saito, Masami Kikuchi, Manabu Uematsu, Atsuro Fukuhara, Suguru Sato, Mitsuru Munakata
BACKGROUND: Increased level of hydrogen sulfide (H2 S) in sputum is reported to be a new biomarker of neutrophilic airway inflammation in chronic airway disorders. However, the relationship between H2 S and disease activity remains unclear. OBJECTIVE: We investigated whether H2 S levels could vary during different conditions in asthma. METHOD: H2 S levels in sputum and serum were measured using a sulfide-sensitive electrode in 47 stable asthmatic subjects (S-BA), 21 uncontrolled asthmatic subjects (UC-BA), 26 asthmatic subjects with acute exacerbation (AE-BA), and 15 healthy subjects...
May 14, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
Cesira Giordano, Francesco Spennati, Gualtiero Mori, Giulio Munz, Claudia Vannini
The information available on the microbial communities responsible for pollutant degradation is increasingly accessible. Its use to optimize process design and operation is an important challenge in the field of effluent treatment research. Therefore, a prototype of a moving bed biotrickling filter (MBBTF) reactor was designed and, for the first time, operated at full-scale for the removal of sulfides desorbing from tannery industrial wastewater. The bacterial community operating in this innovative reactor was studied, and its composition and response to different operating conditions were characterized...
April 25, 2018: Systematic and Applied Microbiology
Chien-Ning Hsu, You-Lin Tain
Adverse environments occurring during kidney development may produce long-term programming effects, namely renal programming, to create increased vulnerability to the development of later-life hypertension and kidney disease. Conversely, reprogramming is a strategy aimed at reversing the programming processes in early life, even before the onset of clinical symptoms, which may counter the rising epidemic of hypertension and kidney disease. Hydrogen sulfide (H₂S), the third gasotransmitter, plays a key role in blood pressure regulation and renal physiology...
May 11, 2018: International Journal of Molecular Sciences
Yun-Xiao Zhang, Kui Li, Yu-Xiang Yu, Wei-De Zhang
This work reports effective photocatalysts which are composed of carbon nitride (CN), carbon nanotubes (CNTs), MoS2 and NiS, for hydrogen evolution aiming at energy crises and environmental pollutions. The morphologies and optical properties of the photocatalysts were carefully characterized and their photocatalytic performance towards water reduction was studied afterwards. MoS2 and NiS exhibit a significant synergistic effect working as co-catalysts. Compared to MoS2 /CN nanohybrid, carbon nanotubes and NiS improved the absorption of visible light and the separation of charge carriers effectively...
May 3, 2018: Journal of Colloid and Interface Science
Ryan C Fortenberry, Tarek Trabelsi, Joseph S Francisco
The well-studied hydrogen sulfide molecule is shown here for the first time to form a S-S bond barrierlessly with sulfur atomic cation to produce stable H2 SS+ , a compound for which there is nearly no literature data. Previous work has shown that the reaction of hydrogen sulfide with neutral atomic sulfur will likely only take place at high pressures. Conversely, this work shows that hydrogen sulfide will readily bind with atomic sulfur cation first through the 1 4 A'' state from association of H2 S with S+ (4 S) and then will relax down to the nearly degenerate 1 2 A' or 1 2 A'' states...
May 11, 2018: Journal of Physical Chemistry. A
Nikolay Bazhanov, Teodora Ivanciuc, Haotian Wu, Matteo Garofalo, Jianming Kang, Ming Xian, Antonella Casola
We have recently shown that endogenous hydrogen sulfide (H₂S), an important cellular gaseous mediator, exerts an antiviral and anti-inflammatory activity in vitro and in vivo, and that exogenous H₂S delivered via the synthetic H₂S-releasing compound GYY4137 also has similar properties. In this study, we sought to extend our findings to a novel class of H₂S donors, thiol-activated gem-dithiol-based (TAGDDs). In an in vitro model of human respiratory syncytial virus (RSV) infection, TAGDD-1 treatment significantly reduced viral replication, even when added up to six hours after infection...
May 10, 2018: Viruses
Yong Huang, Zhen Zhang, Yanru Huang, Zhimin Mao, Xiawen Yang, Yuki Nakamura, Norifumi Sawada, Takahiko Mitsui, Masayuki Takeda, Jian Yao
Hydrogen sulfide (H2 S), an endogenous gas mediator with multifaced biological functions, has been shown to be effective in the prevention and treatment of renal sclerosis in several models of chronic renal diseases. The mechanisms involved are still unclear. Given that Ang II- and TGF-β-induced renal tubular epithelial-mesenchymal transition (EMT) is a pivotal cellular event leading to renal sclerosis, we examined whether and how H2 S intervened the processes of EMT. Ang II stimulated EMT in renal tubular epithelial cells, as indicated by the increased level of α-smooth muscle actin and a decreased level of E-cadherin...
May 7, 2018: Biochemical and Biophysical Research Communications
Panzhi Wang, Liming Wu
No abstract text is available yet for this article.
April 2018: Hepatobiliary Surgery and Nutrition
Amina Basic, Sara Alizadehgharib, Gunnar Dahlén, Ulf Dahlgren
The aim was to investigate if hydrogen sulfide (H2 S) induces the formation of the NLRP3 inflammasome and subsequent IL-1β and IL-18 secretion in human peripheral blood mononuclear cells (PBMCs) and in the human monocyte cell line THP1. Bacterial production of H2 S has been suggested to participate in the inflammatory host response in periodontitis pathogenesis. H2 S is a toxic gas with pro-inflammatory properties. It is produced by bacterial degradation of sulfur-containing amino acids, for example, cysteine...
June 2017: Clinical and Experimental Dental Research
Chuancheng Duan, Robert J Kee, Huayang Zhu, Canan Karakaya, Yachao Chen, Sandrine Ricote, Angelique Jarry, Ethan J Crumlin, David Hook, Robert Braun, Neal P Sullivan, Ryan O'Hayre
Protonic ceramic fuel cells, like their higher-temperature solid-oxide fuel cell counterparts, can directly use both hydrogen and hydrocarbon fuels to produce electricity at potentially more than 50 per cent efficiency1,2 . Most previous direct-hydrocarbon fuel cell research has focused on solid-oxide fuel cells based on oxygen-ion-conducting electrolytes, but carbon deposition (coking) and sulfur poisoning typically occur when such fuel cells are directly operated on hydrocarbon- and/or sulfur-containing fuels, resulting in severe performance degradation over time3-6 ...
May 2018: Nature
Maojun Liu, Zining Li, Biao Liang, Ling Li, Shengquan Liu, Wenting Tan, Junrong Long, Fen Tang, Chun Chu, Jun Yang
This study aims to investigate the role and regulatory mechanism of the Hydrogen sulfide (H2 S) in amelioration of rat myocardial fibrosis induced by thyroxine through interfering the autophagy via regulating the activity of PI3K/AKT1 signaling pathway and the expression of relative miRNA. 40 adult male SD rats were randomly divided into 4 groups (n = 10): the control group, the thyroxine model group (TH group), the model group with H2 S intervention (TH + H2 S group) and the normal group with H2 S intervention (H2 S group)...
May 9, 2018: Endocrine Journal
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