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https://www.readbyqxmd.com/read/28806551/effects-of-agricultural-land-use-on-fluvial-carbon-dioxide-methane-and-nitrous-oxide-concentrations-in-a-large-european-river-the-meuse-belgium
#1
A V Borges, F Darchambeau, T Lambert, S Bouillon, C Morana, S Brouyère, V Hakoun, A Jurado, H-C Tseng, J-P Descy, F A E Roland
We report a data-set of CO2, CH4, and N2O concentrations in the surface waters of the Meuse river network in Belgium, obtained during four surveys covering 50 stations (summer 2013 and late winter 2013, 2014 and 2015), from yearly cycles in four rivers of variable size and catchment land cover, and from 111 groundwater samples. Surface waters of the Meuse river network were over-saturated in CO2, CH4, N2O with respect to atmospheric equilibrium, acting as sources of these greenhouse gases to the atmosphere, although the dissolved gases also showed marked seasonal and spatial variations...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28776683/hypercapnia-induced-active-expiration-increases-in-sleep-and-enhances-ventilation-in-unanaesthetized-rats
#2
Isabela P Leirão, Carlos A Silva, Luciane H Gargaglioni, Glauber S F da Silva
Expiration is passive at rest but becomes active through recruitment of abdominal muscles under increased respiratory drive. Hypercapnia-induced active expiration has not been well explored in unanaesthetized rats. We hypothesized that (i) CO2 -evoked active expiration is recruited in a state-dependent manner i.e. differently in sleep or wakefulness and (ii) that recruitment of active expiration enhances ventilation, hence having an important functional role in meeting metabolic demand. To test these hypotheses Wistar rats (280-330 g) were implanted with electrodes for electroencephalography (EEG) and electromyography (EMG) of the neck, diaphragm (DIA) and abdominal (ABD) muscles...
August 3, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28775283/structural-basis-for-the-mechanism-of-atp-dependent-acetone-carboxylation
#3
Florence Mus, Brian J Eilers, Alexander B Alleman, Burak V Kabasakal, Jennifer N Wells, James W Murray, Boguslaw P Nocek, Jennifer L DuBois, John W Peters
Microorganisms use carboxylase enzymes to form new carbon-carbon bonds by introducing carbon dioxide gas (CO2) or its hydrated form, bicarbonate (HCO3(-)), into target molecules. Acetone carboxylases (ACs) catalyze the conversion of substrates acetone and HCO3(-) to form the product acetoacetate. Many bicarbonate-incorporating carboxylases rely on the organic cofactor biotin for the activation of bicarbonate. ACs contain metal ions but not organic cofactors, and use ATP to activate substrates through phosphorylation...
August 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28765670/microleakage-in-class-v-composite-restorations-after-desensitizing-surface-treatment-with-er-yag-and-co2-lasers
#4
Hamid Reza Mozaffari, Alireza Ehteshami, Farshad Zallaghi, Nasim Chiniforush, Zohreh Moradi
Aims: Glutaraldehyde, CO2 and Er:YAG lasers can be used for treatment of dentin hypersensitivity. However, their application may have adverse effects on the clinical service of restorations. This study aimed to assess the microleakage in composite restorations following surface treatment with Glutaraldehyde desensitizer, CO2 and Er:YAG laser irradiation for treatment of dentin hypersensitivity. Materials and methods: This experimental study was conducted on 60 extracted sound human teeth. Class V cavities were prepared measuring 3×3 mm using a diamond bur...
December 30, 2016: Laser Therapy
https://www.readbyqxmd.com/read/28762180/optimum-support-by-high-flow-nasal-cannula-in-acute-hypoxemic-respiratory-failure-effects-of-increasing-flow-rates
#5
Tommaso Mauri, Laura Alban, Cecilia Turrini, Barbara Cambiaghi, Eleonora Carlesso, Paolo Taccone, Nicola Bottino, Alfredo Lissoni, Savino Spadaro, Carlo Alberto Volta, Luciano Gattinoni, Antonio Pesenti, Giacomo Grasselli
PURPOSE: Limited data exist on the correlation between higher flow rates of high-flow nasal cannula (HFNC) and its physiologic effects in patients with acute hypoxemic respiratory failure (AHRF). We assessed the effects of HFNC delivered at increasing flow rate on inspiratory effort, work of breathing, minute ventilation, lung volumes, dynamic compliance and oxygenation in AHRF patients. METHODS: A prospective randomized cross-over study was performed in non-intubated patients with patients AHRF and a PaO2/FiO2 (arterial partial pressure of oxygen/fraction of inspired oxygen) ratio of ≤300 mmHg...
July 31, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28724918/contrast-enhancement-of-biological-nanoporous-materials-with-zinc-oxide-infiltration-for-electron-and-x-ray-nanoscale-microscopy
#6
L E Ocola, V Sampathkumar, N Kasthuri, R P Winarski
We show that using infiltration of ZnO metal oxide can be useful for high resolution imaging of biological samples in electron and X-ray microscopy. The method is compatible with standard fixation techniques that leave the sample dry, such as finishing with super critical CO2 drying, or simple vacuum drying up to 95 °C. We demonstrate this technique can be applied on tooth and brain tissue samples. We also show that high resolution X-ray tomography can be performed on biological systems using Zn K edge (1s) absorption to enhance internal structures, and obtained the first nanoscale 10 KeV X-ray absorption images of the interior regions of a tooth...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28713699/transoral-thyroidectomy-why-is-it-needed
#7
REVIEW
Gianlorenzo Dionigi, Matteo Lavazza, Chei-Wei Wu, Hui Sun, Xiaoli Liu, Ralph P Tufano, Hoon Yub Kim, Jeremy D Richmon, Angkoon Anuwong
Transoral thyroidectomy (TOT) represents reasonably the desirable minimally invasive approach to the gland due to the scarless non-visible incisions, the limited distance between the gland and the access that minimize tissue dissection and respect of the surgical anatomical planes. Patients are routinely selected according to an extensive inclusion criteria: (I) ultrasonographically (US) estimated thyroid diameter not larger than 10 cm; (II) US gland volume ≤45 mL; (III) nodule size ≤50 mm; (IV) a benign tumor, such as a thyroid cyst, single-nodular goiter, or multinodular goiter; (V) follicular neoplasm; (VI) papillary microcarcinoma without lymph node metastasis...
June 2017: Gland Surgery
https://www.readbyqxmd.com/read/28688402/temperature-dependence-of-the-photodissociation-of-co2-from-high-vibrational-levels-205-230-nm-imaging-studies-of-co-x-1-%C3%AE-and-o-3-p-1-d-products
#8
S Sutradhar, B R Samanta, A K Samanta, H Reisler
The 205-230 nm photodissociation of vibrationally excited CO2 at temperatures up to 1800 K was studied using Resonance Enhanced Multiphoton Ionization (REMPI) and time-sliced Velocity Map Imaging (VMI). CO2 molecules seeded in He were heated in an SiC tube attached to a pulsed valve and supersonically expanded to create a molecular beam of rotationally cooled but vibrationally hot CO2. Photodissociation was observed from vibrationally excited CO2 with internal energies up to about 20 000 cm(-1), and CO(X(1)Σ(+)), O((3)P), and O((1)D) products were detected by REMPI...
July 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28683524/enhancing-antioxidant-activities-of-wines-by-addition-ofwhite-rose-extract
#9
Hyunbin Seong, Jieun Heo, Kyun Hee Lee, Yoon Bok Lee, Yun Bae Kim, Nam Soo Han
White rose petal extract (WRE) contains large amounts of phenolic compounds and is considered edible. In this study, red and white wines were prepared by the addition of WRE (0.10% or 0.25%, w/v), followed by fermentation at 25°C for 15 days. The fermentation profiles, colors, sensory test results, and antioxidant activities of wines were compared. As reported herein, the fermentation profiles such as the pH, CO2 production rate, and final ethanol concentration were not affected by the addition of WRE, but a slow consumption rate of sugar was observed in 0...
July 7, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28683434/the-combined-effects-of-superchilling-and-packaging-on-the-shelf-life-of-lamb
#10
M Bellés, V Alonso, P Roncalés, J A Beltrán
The aim of this study was to evaluate the effect of superchilled storage at -1° on the shelf life of lamb slices packaged in an O2 enriched (40% O2/30% CO2/30% Ar) or in an anaerobic atmosphere (vacuum skin packaging). Physicochemical, microbial and sensory analyses were performed. The effect of superchilled storage on lamb stability differed depending on the atmosphere surrounding the product. Superchilled (-1°C) slices of lamb showed lower microbial counts than those refrigerated at 4°C in both packaging conditions...
June 28, 2017: Meat Science
https://www.readbyqxmd.com/read/28681292/biochars-mitigate-greenhouse-gas-emissions-and-bioaccumulation-of-potentially-toxic-elements-and-arsenic-speciation-in-phaseolus-vulgaris-l
#11
Muhammad Ibrahim, Gang Li, Sardar Khan, Qiaoqiao Chi, Yaoyang Xu
Anthropogenic and natural activities can lead to increased greenhouse gas emissions and discharge of potentially toxic elements (PTEs) into soil environment. Biochar amendment to soils is a cost-effective technology and sustainable approach used to mitigate greenhouse gas emissions, improve phytoremediation, and minimize the health risks associated with consumption of PTE-contaminated vegetables. Greenhouse pot experiments were conducted to investigate the effects of peanut shell biochar (PNB) and sewage sludge biochar (SSB) on greenhouse gas (GHG) emissions, plant growth, PTE bioaccumulation, and arsenic (As) speciation in bean plants...
July 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28680102/large-perturbations-in-co2-flux-and-subsequent-chemosynthesis-are-induced-in-agricultural-soil-by-the-addition-of-elemental-sulfur
#12
Brian P Kelleher, Paul V Flanagan, Kris M Hart, Andre J Simpson, Seth F Oppenheimer, Brian T Murphy, Shane S O'Reilly, Sean F Jordan, Anthony Grey, Aliyu Ibrahim, Christopher C R Allen
The microbial contribution to soil organic matter has been shown to be much larger than previously thought and thus it plays a major role in carbon cycling. Among soil microorganisms, chemoautotrophs can fix CO2 without sunlight and can glean energy through the oxidation of reduced elements such as sulfur. Here we show that the addition of sulfur to soil results in an initial surge in production of CO2 through microbial respiration, followed by an order of magnitude increase in the capture of carbon from the atmosphere as elemental sulfur is oxidised to sulfate...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28677238/chemical-compositions-and-antioxidant-activities-of-essential-oil-extracted-from-the-petals-of-three-wild-tree-peony-species-and-eleven-cultivars
#13
Jia-Yi Sun, Xiao-Xiao Zhang, Li-Xin Niu, Yan-Long Zhang
The aim of this study was to investigate the essential oil (EO) compositions and antioxidant activities from petals of three wild tree peony species (Paeonia delavayi, P. lutea and P. rockii) and eleven P. suffruticosa cultivars from different cultivar groups. The EOs yields varied from 0.63% to 1.25% (v/v) among samples when using supercritical CO2 extraction. One hundred and sixty-three components were detected by GC-MS; and among them, linalool oxide, Z-5-dodecen-1-yl acetate, nonadecane, Z-5-nonadecene, heneicosane, phytol, and linoleic acid ethyl ester were dominant...
July 4, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28666992/oxygen-uptake-efficiency-slope-predicts-poor-outcome-in-patients-with-idiopathic-pulmonary-arterial-hypertension
#14
Yi Tang, Qin Luo, Zhihong Liu, Xiuping Ma, Zhihui Zhao, Zhiwei Huang, Liu Gao, Qi Jin, Changming Xiong, Xinhai Ni
BACKGROUND: Few published studies have evaluated the power of the oxygen uptake efficiency slope (OUES) to predict outcomes in patients with idiopathic pulmonary arterial hypertension (IPAH), who typically die of right-sided heart failure. Our study sought to evaluate the power of OUES to predict clinical worsening and mortality in patients with IPAH. METHODS AND RESULTS: Patients with newly diagnosed IPAH who underwent symptom-limited cardiopulmonary exercise testing from November 11, 2010, to June 25, 2015, in our hospital were prospectively enrolled and followed for up to 66 months...
June 30, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28662298/advanced-film-forming-gel-formula-vs-spring-thermal-water-and-white-petrolatum-as-primary-dressings-after-full-face-ablative-fractional-co2-laser-resurfacing-a-comparative-split-face-pilot-study
#15
Leonardo Marini
BACKGROUND: Aesthetically pleasing results and fast, uneventful recovery are highly desirable after rejuvenating ablative laser procedures. Wound dressings following ablative laser procedures should ideally improve and optimize the wound healing environment. OBJECTIVE: The purpose of this comparative split face, single blinded, prospective observational study was to assess the efficacy and acceptability of two primary wound dressings immediately after a full face fractional CO2 laser resurfacing procedure...
June 29, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28657636/bioelectrochemical-conversion-of-co2-to-chemicals-co2-as-a-next-generation-feedstock-for-electricity-driven-bioproduction-in-batch-and-continuous-modes
#16
Suman Bajracharya, Karolien Vanbroekhoven, Cees J N Buisman, David P B T B Strik, Deepak Pant
The recent concept of microbial electrosynthesis (MES) has evolved as an electricity-driven production technology for chemicals from low-value carbon dioxide (CO2) using micro-organisms as biocatalysts. MES from CO2 comprises bioelectrochemical reduction of CO2 to multi-carbon organic compounds using the reducing equivalents produced at the electrically-polarized cathode. The use of CO2 as a feedstock for chemicals is gaining much attention, since CO2 is abundantly available and its use is independent of the food supply chain...
June 28, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28656598/sugar-blowing-induced-porous-cobalt-phosphide-nitrogen-doped-carbon-nanostructures-with-enhanced-electrochemical-oxidation-performance-toward-water-and-other-small-molecules
#17
Chengzhou Zhu, Shaofang Fu, Bo Z Xu, Junhua Song, Qiurong Shi, Mark H Engelhard, Xiaolin Li, Scott P Beckman, Junming Sun, Dan Du, Yuehe Lin
Rational design of high active and robust nonprecious metal catalysts with excellent catalytic efficiency in oxygen evolution reaction (OER) is extremely vital for making the water splitting process more energy efficient and economical. Among these noble metal-free catalysts, transition-metal-based nanomaterials are considered as one of the most promising OER catalysts due to their relatively low-cost intrinsic activities, high abundance, and diversity in terms of structure and morphology. Herein, a facile sugar-blowing technique and low-temperature phosphorization are reported to generate 3D self-supported metal involved carbon nanostructures, which are termed as Co2 P@Co/nitrogen-doped carbon (Co2 P@Co/N-C)...
June 28, 2017: Small
https://www.readbyqxmd.com/read/28642340/cardiovascular-and-cerebral-hemodynamics-during-exercise-and-recovery-in-obese-individuals-as-a-function-of-their-fitness-status
#18
Mathieu Gayda, Gabriel Lapierre, Olivier Dupuy, Sarah Fraser, Louis Bherer, Martin Juneau, Vincent Gremeaux, Anil Nigam
The aim of this study was to compare cardiovascular hemodynamics and cerebral oxygenation/perfusion (COP) during and after maximal incremental exercise in obese individuals according to their aerobic fitness versus age-matched healthy controls (AMHC). Fifty-four middle-aged obese (OB) and 16 AMHC were recruited. Maximal cardiopulmonary function (gas exchange analysis), cardiac hemodynamics (impedance cardiography), and left frontal COP (near-infrared spectroscopy: NIRS) were measured continuously during a maximal incremental ergocycle test...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28640773/salivary-mitochondrial-dna-copy-number-is-associated-with-exercise-ventilatory-efficiency
#19
Yang Chen, Helene Z Hill, Gudrun Lange, Michael J Falvo
Chen, Y, Hill, HZ, Lange, G, and Falvo, MJ. Salivary mitochondrial DNA copy number is associated with exercise ventilatory efficiency. J Strength Cond Res 31(7): 2000-2004, 2017-Mitochondrial DNA copy number (mtDNAcn) is an index of mitochondrial content and is responsive to changes in exercise training volume. Therefore, assessment of mtDNAcn may help to optimize exercise prescription and aid in athlete monitoring. Although previous work has assessed mtDNAcn derived from skeletal muscle and blood using invasive approaches, no study has examined salivary mtDNAcn and its relationship with sport performance...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28637880/a-study-comparing-vein-integrity-and-clinical-outcomes-vico-in-open-vein-harvesting-and-two-types-of-endoscopic-vein-harvesting-for-coronary-artery-bypass-grafting-the-vico-randomised-clinical-trial
#20
Bhuvaneswari Krishnamoorthy, William R Critchley, Alexander J Thompson, Katherine Payne, Julie Morris, Rajamiyer V Venkateswaran, Ann L Caress, James E Fildes, Nizar Yonan
Background -Current consensus statements maintain that endoscopic vein harvesting (EVH) should be standard care in coronary artery bypass surgery (CABG) but vein quality and clinical outcomes have been questioned. The Vein Integrity and Clinical Outcome (VICO) trial was designed to assess the impact of different vein harvesting methods on vessel damage and if this contributes to clinical outcomes following CABG. Methods -A single centre, randomised clinical trial of patients undergoing CABG with an internal mammary artery, and with one to four vein grafts were recruited...
June 21, 2017: Circulation
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