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https://www.readbyqxmd.com/read/28527680/sensitivity-of-salivary-hydrogen-sulfide-to-psychological-stress-and-its-association-with-exhaled-nitric-oxide-and-affect
#1
Juliet L Kroll, Chelsey A Werchan, Audrey G Reeves, Kevin J Bruemmer, Alexander R Lippert, Thomas Ritz
BACKGROUND: Hydrogen sulfide (H2S) is the third gasotransmitter recently discovered after nitric oxide (NO) and carbon monoxide. Both NO and H2S are involved in multiple physiological functions. Whereas NO has been shown to vary with psychological stress, the influence of stress on H2S and the relationship between H2S and NO are unknown. We therefore examined levels of salivary H2S and NO in response to a stressful final academic exam period. METHODS: Measurements of stress, negative affect, and fraction of exhaled NO (FENO), were obtained from students (N=16) and saliva was collected at three time points: low-stress period in the semester, early exam period, and late exam period...
May 17, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28526793/genomic-analysis-of-calderihabitans-maritimus-kkc1-a-thermophilic-hydrogenogenic-carboxydotrophic-bacterium-isolated-from-marine-sediment
#2
Kimiho Omae, Yasuko Yoneda, Yuto Fukuyama, Takashi Yoshida, Yoshihiko Sako
Calderihabitans maritimus KKC1 is a thermophilic hydrogenogenic carboxydotroph isolated from a submerged marine caldera. Here, we describe the de novo sequencing and feature analysis of the C. maritimus KKC1 genome. Genome-based phylogenetic analysis confirmed that C. maritimus KKC1 was most closely related to the genus Moorella, which includes well-studied acetogenic members. Comparative genomic analysis revealed that, like Moorella, C. maritimus KKC1 retained both the CO2-reducing Wood-Ljungdahl pathway and energy-converting hydrogenase-based module activated by reduced ferredoxin, but lacked the HydABC and NfnAB electron bifurcating enzymes and pyruvate:ferredoxin oxidoreductase required for ferredoxin reduction during acetogenic growth...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28526659/framework-for-assessing-causality-of-air-pollution-related-health-effects-for-reviews-of-the-national-ambient-air-quality-standards
#3
Elizabeth Oesterling Owens, Molini M Patel, Ellen Kirrane, Thomas C Long, James Brown, Ila Cote, Mary A Ross, Steven J Dutton
To inform regulatory decisions on the risk due to exposure to ambient air pollution, consistent and transparent communication of the scientific evidence is essential. The United States Environmental Protection Agency (U.S. EPA) develops the Integrated Science Assessment (ISA), which contains evaluations of the policy-relevant science on the effects of criteria air pollutants and conveys critical science judgments to inform decisions on the National Ambient Air Quality Standards. This article discusses the approach and causal framework used in the ISAs to evaluate and integrate various lines of scientific evidence and draw conclusions about the causal nature of air pollution-induced health effects...
May 16, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28526500/pulmonary-function-tests-do-not-predict-mortality-in-patients-undergoing-continuous-flow-left-ventricular-assist-device-implantation
#4
Edo K S Bedzra, Todd F Dardas, Richard K Cheng, Jay D Pal, Claudius Mahr, Jason W Smith, Kent Shively, S Carolina Masri, Wayne C Levy, Nahush A Mokadam
OBJECTIVES: To investigate the effect of pulmonary function testing on outcomes after continuous flow left ventricular assist device implantation. METHODS: A total of 263 and 239 patients, respectively, had tests of forced expiratory volume in 1 second and diffusing capacity of the lungs for carbon monoxide preoperatively for left ventricular assist device implantations between July 2005 and September 2015. Kaplan-Meier analysis and multivariable Cox regressions were performed to evaluate mortality...
April 11, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28525710/mercury-telluride-quantum-dot-based-phototransistor-enabling-high-sensitivity-room-temperature-photodetection-at-2000-nanometers
#5
Mengyu Chen, Haipeng Lu, Nema M Abdelazim, Ye Zhu, Zhen Wang, Wei Ren, Stephen V Kershaw, Andrey L Rogach, Ni Zhao
Near-to-Mid infrared photodetection technologies could be widely deployed to advance the infrastructures of surveillance, environmental monitoring and manufacturing, if the detection devices would be low-cost, in compact format and with high performance. For such application requirements, colloidal quantum dot (QD) based photodetectors stand out as particularly promising due to the solution processability and ease of integration with silicon technologies; unfortunately, the detectivity of the QD photodetectors towards longer wavelengths has so far been low...
May 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28525271/electron-spin-relaxation-and-biochemical-characterization-of-the-hydrogenase-maturase-hydf-insights-into-2fe-2s-and-4fe-4s-cluster-communication-and-hydrogenase-activation
#6
Eric M Shepard, Amanda S Byer, Priyanka Aggarwal, Jeremiah N Betz, Anna G Scott, Krista Shisler, Robert J Usselman, Gareth R Eaton, Sandra S Eaton, Joan B Broderick
Nature utilizes [FeFe]-hydrogenase enzymes to catalyze the interconversion between H2 and protons and electrons. Catalysis occurs at the H-cluster, a carbon monoxide, cyanide, and dithiomethylamine-coordinated 2Fe subcluster bridged via a cysteine to a [4Fe-4S] cluster. Biosynthesis of this unique metallocofactor is accomplished by three maturase enzymes denoted HydE, HydF, and HydG. HydE and HydG belong to the radical S-adenosylmethionine superfamily of enzymes and synthesize the nonprotein ligands of the H-cluster...
May 19, 2017: Biochemistry
https://www.readbyqxmd.com/read/28523936/experimental-spectroscopic-studies-of-carbon-monoxide-co-fluorescence-at-high-temperatures-and-pressures
#7
Olivier Carrivain, Mikael Orain, Nelly Dorval, Celine Morin, Guillaume Legros
Two-photon excitation laser-induced fluorescence of carbon monoxide (CO-LIF) is investigated experimentally in order to determine the applicability of this technique for imaging CO concentration in aeronautical combustors. Experiments are carried out in a high temperature, high-pressure test cell, and in a laminar premixed CH4/air flame. Influence of temperature and pressure on CO-LIF spectra intensity and shape is reported. The experimental results show that as pressure increases, the CO-LIF excitation spectrum becomes asymmetric...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28523329/respiratory-bronchiolitis-associated-interstitial-lung-disease-an-unexpected-form-of-idiopathic-interstitial-pneumonia-in-a-young-male
#8
Claudia Lucia Toma, Elena Danteş, Diana Gabriela Leonte, Ariadna Petronela Fildan
Cigarette smoking is the most frequently encountered risk factor for chronic obstructive pulmonary disease and lung cancer. The latest American Thoracic Society÷European Respiratory Society classification of idiopathic interstitial pneumonia includes two entities related to smoking habits: respiratory bronchiolitis-associated interstitial lung disease and desquamative interstitial pneumonia. The new approach to diagnosis is to combine pathological pattern with clinical and radiological data. Lung biopsy is no longer considered the "gold standard" for diagnosis, but as a part of the diagnosis, which shall be set only after the pulmonologist, radiologist and pathologist reviewed all clinical, imaging and pathological aspects...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28522767/individual-hemoglobin-mass-response-to-normobaric-and-hypobaric-live-high-train-low-a-one-year-crossover-study
#9
Anna Hauser, Severin Troesch, Jonas J Saugy, Laurent Schmitt, Roberto Cejuela-Anta, Raphael Faiss, Thomas Steiner, Neil Robinson, Grégoire P Millet, Jon Peter Wehrlin
PURPOSE: To compare individual hemoglobin mass (Hbmass) changes following a live high-train low (LHTL) altitude training camp under either normobaric hypoxia (NH) or hypobaric hypoxia (HH) conditions in endurance athletes. METHODS: In a crossover design with a one-year washout, 15 male triathletes randomly performed two 18-d LHTL training camps in either HH or NH. All athletes slept at 2250 m and trained at altitudes < 1200 m. Hbmass was measured in duplicate with the optimized carbon monoxide rebreathing method before (pre-) and immediately after (post-) each 18 d training camp...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28522279/-stereotactic-lung-radiotherapy-technical-setting-up-on-novalis-tx-%C3%A2-and-single-centre-prospective-study-of-the-100-first-malignant-pulmonary-nodules-treated-at-centre-jean-perrin
#10
A Bellière-Calandry, G Dupic, F Magnier, V Chassin, V Dedieu, M Lapeyre
PURPOSE: Description of the treatment technique of stereotactic lung radiotherapy on Novalis Tx(®) and prospective study of the first 100 pulmonary nodules treated at centre Jean-Perrin (France). MATERIAL AND METHODS: From October 2012 to December 2015, 100 inoperable pulmonary nodules (62 stage I non-small-cell lung cancer and 38 metastases) of 90 patients with a mean age of 68.2 years (range: 46-89 years) were prospectively treated with dynamic arctherapy on Novalis Tx(®)...
May 15, 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28521234/enhanced-alcohol-titre-and-ratio-in-carbon-monoxide-rich-off-gas-fermentation-of-clostridium-carboxidivorans-through-combination-of-trace-metals-optimization-with-variable-temperature-cultivation
#11
Shaohuang Shen, Yang Gu, Changsheng Chai, Weihong Jiang, Yingping Zhuang, Yonghong Wang
Bioconversion of C1 gases to produce chemicals has good application prospects. Here, the combination of trace metals optimization using a statistical method with variable-temperature cultivation was used to enhance alcohol synthesis during CO-rich off-gas fermentation by Clostridium carboxidivorans P7. Based on ATCC medium 1754, the optimum concentration of the trace metals was found to be 5-fold Ni(2+), Co(2+), SeO4(2+), and WO4(2+); 3.48-fold Cu(2+); 0.55-fold MoO4(2+); 0.5-fold Zn(2+) and (NH4)2SO4·FeSO4·6H2O; and additional 44...
April 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28521104/predicting-chemical-reactivity-from-the-charge-density-through-gradient-bundle-analysis-moving-beyond-fukui-functions
#12
Amanda Morgenstern, Timothy R Wilson, Mark E Eberhart
Predicting chemical reactivity is a major goal of chemistry. Toward this end, atom condensed Fukui functions of conceptual density functional theory have been used to predict which atom is most likely to undergo electrophilic or nucleophilic attack, providing regioselectivity information. We show that the most probable regions for electrophilic attack can be predicted through analysis of gradient bundle volumes---a property that depends only on the charge density of the neutral molecules. We also introduce gradient bundle condensed Fukui functions in order to compare the results from gradient bundle volume analysis...
May 18, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28520857/the-diffusing-capacity-of-the-lung-for-carbon-monoxide-is-associated-with-the-histopathological-aggressiveness-of-lung-adenocarcinoma%C3%A2
#13
Naoki Ozeki, Koji Kawaguchi, Takayuki Fukui, Koichi Fukumoto, Shota Nakamura, Shuhei Hakiri, Taketo Kato, Akihiro Hirakawa, Toshiki Okasaka, Kohei Yokoi
OBJECTIVES: The diffusing capacity of the lung for carbon monoxide (DL CO ) is an indicator of lung damage. We sought to determine whether DL CO is associated with the aggressiveness of lung adenocarcinoma using histopathological indexes, such as tumour differentiation, scar grade, nuclear atypia and the mitotic index. METHODS: Fifty-seven patients with low DL CO (≤80% of predicted) and 466 patients with normal DL CO (>80% of predicted) who underwent R0 resection of lung adenocarcinoma between 2005 and 2012 were retrospectively reviewed...
May 17, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28520563/multiple-deaths-caused-by-a-fire-in-a-factory-identification-and-investigative-issues
#14
V Pinchi, V Bartolini, E Bertol, M Focardi, F Mari, U Ricci, S Vanin, G A Norelli
The article presents a case of multiple casualties following a textile factory fire. The incident required a full DVI team similar to large mass-disaster because of the specific operational aspects and identification difficulties. The autopsy results were consistent with death by fire and the toxicological investigations revealed carbon monoxide poisoning in four cases (HbCO% ranging between 88,05 and 95,77), two deaths by cyanide intoxication (with concentrations between 5,17 and 8,85 mcg/ml), and in one case there was a synergistic effect of the two substances (carbon monoxide and cyanide)...
December 1, 2016: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/28514266/pulmonary-vascular-function-and-aerobic-exercise-capacityat-moderate-altitude
#15
Vitalie Faoro, Gael Deboeck, Marco Vicenzi, Anne-Fleur Gaston, Bamodi Simaga, Grégory Doucende, Ilona Hapkova, Emma Roca, Enric Subirats, Fabienne Durand, Robert Naeije
PURPOSE: There has been suggestion that a greater "pulmonary vascular reserve" defined by a low pulmonary vascular resistance (PVR) and a high lung diffusing capacity (DL) allows for a superior aerobic exercise capacity. How pulmonary vascular reserve might affect exercise capacity at moderate altitude is not known. METHODS: Thirty-eight healthy subjects underwent an exercise stress echocardiography of the pulmonary circulation, combined with measurements of DL for nitric oxide (NO) and carbon monoxide (CO) and a cardio-pulmonary exercise test at sea level and at the altitude of 2250m...
May 17, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28514178/defect-mediated-electron-hole-separation-in-one-unit-cell-znin2s4-layers-for-boosted-solar-driven-co2-reduction
#16
Xingchen Jiao, Zongwei Chen, Xiaodong Li, Yongfu Sun, Shan Gao, Wensheng Yan, Chengming Wang, Qun Zhang, Yue Lin, Yi Luo, Yi Xie
The effect of defects on electron-hole separation is not always clear and is sometimes contradictory. Herein, we initially built clear models of two-dimensional atomic layers with tunable defect concentrations, and hence directly disclose the defect type and distribution at atomic level. As a prototype, defective one-unit-cell ZnIn2S4 atomic layers are successfully synthesized for the first time. Aberration-corrected scanning transmission electron microscopy directly manifests their distinct zinc vacancy concentrations, confirmed by electron spin resonance and X-ray fluorescence analysis...
May 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28512709/influence-of-low-temperature-combustion-and-dimethyl-ether-diesel-blends-on-performance-combustion-and-emission-characteristics-of-common-rail-diesel-engine-a-cfd-study
#17
Venkatesh Tavareppa Lamani, Ajay Kumar Yadav, Kumar Gottekere Narayanappa
Due to presence of more oxygen, absence of carbon-carbon (C-C) bond in chemical structure, and high cetane number of dimethyl ether (DME), pollution from DME operated engine is less compared to diesel engine. Hence, the DME can be a promising alternative fuel for diesel engine. The present study emphasizes the effect of various exhaust gas recirculation (EGR) rates (0-20%) and DME/Diesel blends (0-20%) on combustion characteristics and exhaust emissions of common rail direct injection (CRDI) engine using three-dimensional computational fluid dynamics (CFD) simulation...
May 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28511360/refined-2013-based-vehicle-emission-inventory-and-its-spatial-and-temporal-characteristics-in-zhengzhou-china
#18
Mimi Gong, Shasha Yin, Xingke Gu, Yuanqian Xu, Nan Jiang, Ruiqin Zhang
Vehicle emission is becoming one of the most important pollution sources because of the increase in vehicle population and activity in China. A more reasonable and complete vehicle emission inventory in Zhengzhou for the year 2013 was developed in this study. This inventory is suitable for local emission factors and vehicle kilometers of travel. Estimates show that the total carbon monoxide (CO), hydrocarbon (HC), nitrogen oxide (NOX), particulate matter (PM2.5 and PM10) and sulfur dioxide (SO2) emissions were 291Gg, 35Gg, 106Gg, 6Gg, 7Gg, and 3Gg, respectively...
May 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28510737/total-haemoglobin-mass-but-not-haemoglobin-concentration-is-associated-with-preoperative-cardiopulmonary-exercise-testing-derived-oxygen-consumption-variables
#19
J M Otto, J O M Plumb, D Wakeham, E Clissold, L Loughney, W Schmidt, H E Montgomery, M P W Grocott, T Richards
Background: Cardiopulmonary exercise testing (CPET) measures peak exertional oxygen consumption ( V˙O2peak ) and that at the anaerobic threshold ( V˙O2 at AT, i.e. the point at which anaerobic metabolism contributes substantially to overall metabolism). Lower values are associated with excess postoperative morbidity and mortality. A reduced haemoglobin concentration ([Hb]) results from a reduction in total haemoglobin mass (tHb-mass) or an increase in plasma volume. Thus, tHb-mass might be a more useful measure of oxygen-carrying capacity and might correlate better with CPET-derived fitness measures in preoperative patients than does circulating [Hb]...
May 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28508652/new-infrared-bands-of-the-c-bonded-isomer-of-oc-n2o-and-determination-of-two-intermolecular-frequencies
#20
C Lauzin, A J Barclay, K H Michaelian, N Moazzen-Ahmadi
Three combination bands involving intermolecular modes of the most stable isomer of the OC-N2O van der Waals complex have been observed, two in the carbon monoxide CO stretch region (∼2150 cm(-1)) and one in the ν3 asymmetric stretch region of N2O (∼2223 cm(-1)). Vibrational assignment is achieved by comparison with data recently published ( Barclay , A. ; et al. Chem. Phys. Lett. 2016 , 62 , 651 ), concerning OC-CO2. Two of these bands involve the same intermolecular mode, one with the CO stretch and the other with the ν3 asymmetric stretch of N2O...
May 16, 2017: Journal of Physical Chemistry. A
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