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Hydrogen sulfide

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https://www.readbyqxmd.com/read/28738597/sensitive-detection-of-sulfide-based-on-the-self-assembly-of-fluorescent-silver-nanoclusters-on-the-surface-of-silica-nanospheres
#1
Yehan Yan, Kui Zhang, Huan Yu, Houjuan Zhu, Mingtai Sun, Tasawar Hayat, Ahmed Alsaedi, Suhua Wang
Hydrogen sulfide is a toxic and flammable gaseous pollutant often emitted to air as a by-product of water supply, chemical, petroleum and coal industries. It can be transferred into sulfur dioxide in the air under some meteorologic conditions. Herein, we report a novel ratiometric fluorescence method for hydrogen sulfide based on silver nanoclusters and quantum dots. The silver nanoclusters have been self-assemblied onto the surface of silica spheres, which are embedded with red fluorescent quantum dots, to form a dual-emissive nanohybrid...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738546/a-new-method-for-the-simultaneous-enhancement-of-methane-yield-and-reduction-of-hydrogen-sulfide-production-in-the-anaerobic-digestion-of-waste-activated-sludge
#2
Xiaohu Dai, Chongliang Hu, Dong Zhang, Yinguang Chen
The biogas generated from anaerobic digestion (AD) also includes undesirable by-product such as hydrogen sulfide (H2S), which must be removed before the biogas can be used as a clean energy source. Therefore, it is necessary to find an appropriate strategy to simultaneously enhance the methane yield and reduce H2S production. An efficient strategy-pretreating sludge at pH 10 for 8d and adjusting the system at neutral pH to produce methane for 20d-is reported for the synchronous enhancement of methane production and reduction of H2S production during AD...
July 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28738323/the-role-of-exogenous-hydrogen-sulfide-in-free-fatty-acids-induced-inflammation-in-macrophages
#3
Zhu-Lin Luo, Jian-Dong Ren, Zhu Huang, Tao Wang, Ke Xiang, Long Cheng, Li-Jun Tang
BACKGROUND: This study aimed to investigate whether exogenous hydrogen sulfide (H2S) can protect the RAW264.7 macrophages against the inflammation induced by free fatty acids (FFA) by blunting NLRP3 inflammasome activation via a specific TLR4/NF-κB pathway. METHODS: RAW264.7 macrophages were exposed to increasing concentrations of FFA for up to 3 days to induce FFA-induced inflammation. The cells were pretreated with NaHS (a donor of H2S) before exposure to FFA...
July 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28738262/systematic-review-of-community-health-impacts-of-mountaintop-removal-mining
#4
REVIEW
Abee L Boyles, Robyn B Blain, Johanna R Rochester, Raghavendhran Avanasi, Susan B Goldhaber, Sofie McComb, Stephanie D Holmgren, Scott A Masten, Kristina A Thayer
BACKGROUND: The objective of this evaluation is to understand the human health impacts of mountaintop removal (MTR) mining, the major method of coal mining in and around Central Appalachia. MTR mining impacts the air, water, and soil and raises concerns about potential adverse health effects in neighboring communities; exposures associated with MTR mining include particulate matter (PM), polycyclic aromatic hydrocarbons (PAHs), metals, hydrogen sulfide, and other recognized harmful substances...
July 21, 2017: Environment International
https://www.readbyqxmd.com/read/28736784/a-bioorthogonal-fluorescent-probe-for-mitochondrial-hydrogen-sulfide-new-strategy-for-cancer-cell-labeling
#5
Nithya Velusamy, Anupama Binoy, Kondapa Naidu Bobba, Divya Nedungadi, Nandita Mishra, Sankarprasad Bhuniya
We report the application of a chemodosimeter 'turn on' fluorescent probe for detecting endogenous H2S formation in cancer cells. Mito-HS showed a bathochromic shift in the UV-vis-absorption spectrum from 355 nm to 395 nm in the presence of H2S. Furthermore, it showed an ∼43-fold fluorescence enhancement at λem = 450 nm in the presence of H2S (200 μM). The cancer cell-specific fluorescence imaging reveals that Mito-HS has the ability to distinguish cancer cells from normal cells based on the level of endogenous H2S formation...
July 24, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28733867/gaseous-mediators-in-gastrointestinal-mucosal-defense-and-injury
#6
REVIEW
John L Wallace, Angela Ianaro, Gilberto de Nucci
Of the numerous gaseous substances that can act as signaling molecules, the best characterized are nitric oxide, carbon monoxide and hydrogen sulfide. Contributions of each of these low molecular weight substances, alone or in combination, to maintenance of gastrointestinal mucosal integrity have been established. There is considerable overlap in the actions of these gases in modulating mucosal defense and responses to injury, and in some instances they act in a cooperative manner. Each also play important roles in regulating inflammatory and repair processes throughout the gastrointestinal tract...
July 21, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28731545/genome-scale-data-reveals-that-endemic-poecilia-populations-from-small-sulfidic-springs-display-no-evidence-of-inbreeding
#7
Anthony P Brown, Ryan Greenway, Samuel Morgan, Corey R Quackenbush, Luca Giordani, Lenin Arias-Rodriguez, Michael Tobler, Joanna L Kelley
Populations with limited ranges can be highly vulnerable to changes in their environment and are, thus, of high conservation concern. Populations that experience human-induced range reductions are often highly inbred and lack genetic diversity, but it is unknown whether this is also the case for populations with naturally small ranges. The fishes Poecilia sulphuraria (listed as critically endangered) and Poecilia thermalis, which are endemic to small hydrogen sulfide rich springs in southern Mexico, are examples of such populations with inherently small habitats...
July 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28727092/effects-of-dried-distiller-s-grains-and-lasalocid-inclusion-on-feedlot-lamb-growth-carcass-traits-nutrient-digestibility-ruminal-fluid-volatile-fatty-acid-concentrations-and-ruminal-hydrogen-sulfide-concentration
#8
A R Crane, R R Redden, K C Swanson, B M Howard, T J Frick, K R Maddock-Carlin, C S Schauer
Our hypothesis was that increasing the inclusion level of dried distiller's grains with solubles (DDGS) to feedlot lambs would increase growth and the inclusion of lasalocid (LAS; Bovatec, Alpharma, LLC, Bridgewater, NJ) would increase ADG and G:F, while not affecting digestibility, ruminal VFA concentration, and ruminal pH. Furthermore, we hypothesized that rations containing LAS and higher levels of DDGS would cause increased ruminal hydrogen sulfide gas (HS) concentrations. Two hundred forty crossbred (Suffolk × Rambouillet) lambs (31...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726991/high-sulfate-water-consumption-determines-intake-and-metabolic-responses-to-protein-supplementation-in-lambs-consuming-low-quality-forage
#9
A López, J I Arroquy, A V Juárez Sequeira, N DiLorenzo, M C Barrionuevo, R A Distel
Twenty Hampshire lambs (31 ± 4 kg BW) in individual metabolism cages were used in a 10-treatment by 2-period ( = 4) trial to evaluate the interaction between protein supplementation and sulfate water on intake and metabolic responses when lambs were fed low-quality grass hay (; 6.4% CP, 79.5% NDF). The treatment structure was a 2 × 5 factorial: 2 water qualities (WQ; low-sulfate [LS] and high-sulfate [HS]; 442 and 8,358 mg/kg total dissolved solids, respectively) and 5 soybean meal levels (SBM; 0%, 0.25%, 0...
May 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28726395/synthesis-and-mechanism-of-formation-of-hydride-sulfide-complexes-of-iron
#10
Nicholas A Arnet, Sean F McWilliams, Daniel E DeRosha, Brandon Q Mercado, Patrick L Holland
Iron-sulfide complexes with hydride ligands provide an experimental precedent for spectroscopically detected hydride species on the iron-sulfur MoFe7S9C cofactor of nitrogenase. In this contribution, we expand upon our recent synthesis of the first iron sulfide hydride complex from an iron hydride and a sodium thiolate ( Arnet, N. A.; Dugan, T. R.; Menges, F. S.; Mercado, B. Q.; Brennessel, W. W.; Bill, E.; Johnson, M. A.; Holland, P. L., J. Am. Chem. Soc. 2015 , 137 , 13220 - 13223 ). First, we describe the isolation of an analogous iron sulfide hydride with a smaller diketiminate supporting ligand, which benefits from easier preparation of the hydride precursor and easier isolation of the product...
July 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28722307/localized-defects-on-copper-sulfide-surface-for-enhanced-plasmon-resonance-and-water-splitting
#11
Kaixv Ren, Pengfei Yin, Yuzhu Zhou, Xingzhong Cao, Cunku Dong, Lan Cui, Hui Liu, Xiwen Du
Surficial defects in semiconductor can induce high density of carriers and cause localized surface plasmon resonance which is prone to light harvesting and energy conversion, while internal defects may cause serious recombination of electrons and holes. Thus, it is significant to precisely control the distribution of defects, although there are few successful examples. Herein, an effective strategy to confine abundant defects within the surface layer of Cu1.94 S nanoflake arrays (NFAs) is reported, leaving a perfect internal structure...
July 19, 2017: Small
https://www.readbyqxmd.com/read/28722265/control-of-redox-events-by-dye-encapsulation-applied-to-light-driven-splitting-of-hydrogen-sulfide
#12
Xu Jing, Yang Yang, Cheng He, Zhiduo Chang, Joost N H Reek, Chunying Duan
Inspired by the pocket feature of enzymes, a synthetic platform to combine photocatalytic hydrogen evolution with sulfide oxidation in a one-pot process via control over the location of electron transfer steps is reported in this paper. The redox-active coordination vessel Ni-TFT, which exhibits an octahedral pocket, encapsulates an organic dye to pre-organize for photocatalytic proton reduction via an oxidative quenching pathway using the nickel corners as catalysts, generating molecular hydrogen and the oxidized dye...
July 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28722097/-research-progress-of-the-association-of-hydrogen-sulfide-with-colorectal-cancer-and-its-associated-anti-tumor-drugs
#13
Shanwen Chen, Pengyuan Wang, Yucun Liu
As the third confirmed gaseous transmitters, hydrogen sulfide was found to play a vital role in the eternal milieu both physiologically and pathologically. What's intriguing is that, there exists a debate about the role of hydrogen sulfide in the pathogenesis of cancer, especially colorectal cancer. In this manuscript, progress of the effect of low and high dose hydrogen sulfide on the tumorigenesis of colorectal cancer and research on the antitumor new drugs stemmed from the function of hydrogen sulfide is summarized...
July 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28720320/hydrogen-sulfide-improves-diabetic-wound-healing-in-ob-ob-mice-via-attenuating-inflammation
#14
Huichen Zhao, Shengxia Lu, Jiachao Chai, Yuchao Zhang, Xiaoli Ma, Jicui Chen, Qingbo Guan, Meiyan Wan, Yuantao Liu
BACKGROUND: The proposed mechanisms of impaired wound healing in diabetes involve sustained inflammation, excess oxidative stress and compromised agiogenesis. Hydrogen sulfide (H2S) has been reported to have multiple biological activities. We aim to investigate the role of H2S in impaired wound healing in ob/ob mice and explore the possible mechanisms involved. PROCEDURES: Full-thickness skin dorsal wounds were created on ob/ob mice and C57BL/6 mice. Cystathionine-γ-lyase (CSE) expression and H2S production were determined in granulation tissues of the wounds...
June 30, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28719733/characterizing-a-mouse-model-for-evaluation-of-countermeasures-against-hydrogen-sulfide-induced-neurotoxicity-and-neurological-sequelae
#15
Poojya Anantharam, Elizabeth M Whitley, Belinda Mahama, Dong-Suk Kim, Paula M Imerman, Dahai Shao, Monica R Langley, Arthi Kanthasamy, Wilson K Rumbeiha
Hydrogen sulfide (H2 S) is a highly neurotoxic gas. It is the second most common cause of gas-induced deaths. Beyond mortality, surviving victims of acute exposure may suffer long-term neurological sequelae. There is a need to develop countermeasures against H2 S poisoning. However, no translational animal model of H2 S-induced neurological sequelae exists. Here, we describe a novel mouse model of H2 S-induced neurotoxicity for translational research. In paradigm I, C57/BL6 mice were exposed to 765 ppm H2 S for 40 min on day 1, followed by 15-min daily exposures for periods ranging from 1 to 6 days...
July 18, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28715183/dimethyl-sulfoxide-complexes-detected-at-ambient-conditions
#16
Anne Schou Hansen, Henrik Grum Kjaergaard
Dimethyl sulfoxide (DMSO) is an important intermediate in the atmospheric oxi- dation of dimethyl sulfide (DMS). DMS, emitted from the ocean, is the main natural sulfur source and its oxidation products are essential in the formation of sulfate aerosols. The high atmospheric concentration of water makes hydrogen bonding with DMS and its oxidation products likely. Through hydrogen bonding, water can potentially cat- alyze and affect the steps of the oxidation. We investigate binary hydrogen bound complexes involving DMSO...
July 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28713986/hydrogen-sulfide-prevents-homocysteine%C3%A2-induced-endoplasmic-reticulum-stress-in-pc12-cells-by-upregulating-sirt%C3%A2-1
#17
Chun-Yan Wang, Wei Zou, Xiao-Yu Liang, Zhi-Sheng Jiang, Xiang Li, Hai-Jun Wei, Yi-Yun Tang, Ping Zhang, Xiao-Qing Tang
It was previously confirmed that hydrogen sulfide (H2S) has a neuroprotective effect, preventing homocysteine‑induced neurotoxicity. However, the exact molecular mechanisms underlying this protective effect remain to be fully elucidated. Endoplasmic reticulum (ER) stress contributes to homocysteine‑induced neurotoxicity. Silent mating type information regulator 2 homolog 1 (SIRT‑1) can attenuate ER stress, exerting its neuroprotective effect. Therefore, the present study aimed to investigate whether H2S protects PC12 cells against homocysteine‑induced ER stress and whether SIRT‑1 mediates this protective effect of H2S...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28713283/excitatory-modulation-of-the-preb%C3%A3-tzinger-complex-inspiratory-rhythm-generating-network-by-endogenous-hydrogen-sulfide
#18
Glauber S F da Silva, João P J Sabino, Vishaal Rajani, Tucaauê S Alvares, Silvia Pagliardini, Luiz G S Branco, Gregory D Funk
Hydrogen Sulfide (H2S) is one of three gasotransmitters that modulate excitability in the CNS. Global application of H2S donors or inhibitors of H2S synthesis to the respiratory network has suggested that inspiratory rhythm is modulated by exogenous and endogenous H2S. However, effects have been variable, which may reflect that the RTN/pFRG (retrotrapezoid nucleus, parafacial respiratory group) and the preBötzinger Complex (preBötC, critical for inspiratory rhythm generation) are differentially modulated by exogenous H2S...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28712599/effects-of-woody-peat-and-superphosphate-on-compost-maturity-and-gaseous-emissions-during-pig-manure-composting
#19
Difang Zhang, Wenhai Luo, Jing Yuan, Guoxue Li, Yuan Luo
This study investigated the effect of calcium superphosphate on compost maturity and gaseous emissions during pig manure composting with woody peat as the bulking agent. Two treatments were conducted with or without the addition of calcium superphosphate (10% dry weight of the composting mass), which were denoted as the control and superphosphate-amended treatment, respectively. Results show that the composting temperature of both treatments was higher than 50°C for more than 5days, which is typically required for pathogen destruction during manure composting...
July 13, 2017: Waste Management
https://www.readbyqxmd.com/read/28709848/hydrogen-sulfide-alleviates-placental-injury-induced-by-maternal-cigarette-smoke-exposure-during-pregnancy-in-rats
#20
Fusheng Zhao, Fang Lei, Senfeng Zhang, Xiang Yan, Wen Wang, Yu Zheng
Maternal cigarette smoke exposure (CSE) during pregnancy is a well recognized causative factor for placental injury. Hydrogen sulfide (H2S), a gaseous signal molecule, has been shown to exert a protective effect against tissue injury in many organs. This study aimed to investigate whether H2S could alleviate CSE-induced placental injury in rats. Pregnant SD rats were randomly divided into 4 groups: NaCl, CSE, CSE + NaHS (a donor of H2S) and NaHS. On gestational day 21, placental weight was measured. Placental H2S content was assessed by methylene blue method...
July 11, 2017: Nitric Oxide: Biology and Chemistry
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