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https://www.readbyqxmd.com/read/29233851/incremental-shuttle-walk-test-to-assess-and-prescribe-exercise-for-subjects-with-bronchiectasis-hallway-versus-treadmill
#1
Cristiane S Oliveira, Anderson José, Crislaine O Santos, Cristiane H Y de Oliveira, Thiago C O Carvalho, Rejane A S de Castro, Jessyca P R Selman, Anderson A de Camargo, Simone Dal Corso
INTRODUCTION: The incremental shuttle walk test was initially developed to be carried out in a hallway (ISWT-H) but has been modified to be performed on a treadmill (ISWT-T). However, it is still unknown whether performance on ISWT-H and ISWT-T are similar in patients with bronchiectasis. In this study, we compared the performance, physiological responses, and perception of effort between the ISWT-T with a handrail and ISWT-H for subjects with bronchiectasis. We also sought to estimate and compare the prescription for training intensity with both tests...
December 12, 2017: Respiratory Care
https://www.readbyqxmd.com/read/29199178/carbonic-anhydrase-2-like-in-the-giant-clam-tridacna-squamosa-characterization-localization-response-to-light-and-possible-role-in-the-transport-of-inorganic-carbon-from-the-host-to-its-symbionts
#2
Yuen K Ip, Clarissa Z Y Koh, Kum C Hiong, Celine Y L Choo, Mel V Boo, Wai P Wong, Mei L Neo, Shit F Chew
The fluted giant clam, Tridacna squamosa, lives in symbiosis with zooxanthellae which reside extracellularly inside a tubular system. Zooxanthellae fix inorganic carbon (Ci) during insolation and donate photosynthate to the host. Carbonic anhydrases catalyze the interconversion of CO2 and HCO3-, of which carbonic anhydrase 2 (CA2) is the most ubiquitous and involved in many biological processes. This study aimed to clone a CA2 homolog (CA2-like) from the fleshy and colorful outer mantle as well as the thin and whitish inner mantle of T...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29197950/the-p-type-atpase-ctpg-preferentially-transports-cd2-across-the-mycobacterium-tuberculosis-plasma-membrane
#3
Marcela López, Laudy-Viviana Quitian, Martha-Nancy Calderón, Carlos-Y Soto
P1B-type ATPases are involved in heavy metal transport across the plasma membrane. Some Mycobacterium tuberculosis P-type ATPases are induced during infection, suggesting that this type of transporter could play a critical role in mycobacterial survival. To date, the ion specificity of M. tuberculosis heavy metal-transporting P1B-ATPases is not well understood. In this work, we observed that, although divalent heavy metal cations such as Cu2+, Co2+, Ni2+, Zn2+ Cd2+ and Pb2+ stimulate the ATPase activity of the putative P1B-type ATPase CtpG in the plasma membrane, whole cells of M...
December 2, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/29180485/validation-of-whole-room-indirect-calorimeters-refinement-of-current-methodologies
#4
Russell Rising, Thomas Foerster, Avigdor D Arad, Jeanine Albu, Xavier Pi-Sunyer
Whole room indirect calorimeter (WRIC) validation techniques consist of propane combustion (PC) or infusion of mixed carbon dioxide (CO2) and nitrogen (N2) by a precision blender (PB). To determine the best method, PC of 6, 10, 22-h and PB infusions of 6, 10, and 14-h, were conducted. The 14-h infusion consisted of two metabolic settings. Energy expenditure (EE; kJ), ventilation (V; liters/min) of oxygen (VO2), VCO2, and respiratory quotient (VCO2/VO2) obtained from the WRIC were extrapolated to the respective test durations and compared to similarly calculated values...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29173632/microbiological-chemical-and-sensory-spoilage-analysis-of-raw-atlantic-cod-gadus-morhua-stored-under-modified-atmospheres
#5
L Kuuliala, Y Al Hage, A-G Ioannidis, M Sader, F-M Kerckhof, M Vanderroost, N Boon, B De Baets, B De Meulenaer, P Ragaert, F Devlieghere
During fish spoilage, microbial metabolism leads to the production of volatile organic compounds (VOCs), characteristic off-odors and eventual consumer rejection. The aim of the present study was to contribute to the development of intelligent packaging technologies by identifying and quantifying VOCs that indicate spoilage of raw Atlantic cod (Gadus morhua) under atmospheres (%v/v CO2/O2/N2) 60/40/0, 60/5/35 and air. Spoilage was examined by microbiological, chemical and sensory analyses over storage time at 4 or 8 °C...
April 2018: Food Microbiology
https://www.readbyqxmd.com/read/29164591/trend-of-decreasing-length-of-cervical-cone-excision-during-the-last-20-years
#6
F Sopracordevole, N Clemente, G Delli Carpini, G Giorda, A Del Fabro, L Moriconi, G De Piero, L Alessandrini, V Canzonieri, M Buttignol, M Nicodemo, A Ciavattini
OBJECTIVE: The aim of the present investigation was to evaluate the cervical conizations performed in the last 20 years in a single institution, with a particular interest in analyzing the trend of the length of cone excisions. PATIENTS AND METHODS: A retrospective cohort study of women who underwent a CO2-laser cervical conization between January 1996 and December 2015. Cytological abnormalities on referral pap smear, colposcopic findings and pertinent clinical and socio-demographic characteristics of each woman were collected...
November 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29139094/investigating-the-therapeutic-potential-and-mechanism-of-curcumin-in-breast-cancer-based-on-rna-sequencing-and-bioinformatics-analysis
#7
Rong Wang, Jinbin Li, Yulan Zhao, Yapeng Li, Ling Yin
BACKGROUND: Breast cancer is a prevalent cancer in female. This study aims to investigate the therapeutic potential and mechanism of curcumin in breast cancer. METHODS: After cultivation, human breast cancer cells (MCF-7 cells) were treated with 0.1% (v/v) 15 µmol/ml curcumin-dimethylsulfoxide solution and 0.1% (v/v) dimethylsulfoxide, respectively, at 37 °C and 5% CO2 for 48 h. Total RNA was extracted, cDNA library was constructed, and cDNAs were amplified and sequenced...
November 14, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/29134193/snowball-earth-climate-dynamics-and-cryogenian-geology-geobiology
#8
Paul F Hoffman, Dorian S Abbot, Yosef Ashkenazy, Douglas I Benn, Jochen J Brocks, Phoebe A Cohen, Grant M Cox, Jessica R Creveling, Yannick Donnadieu, Douglas H Erwin, Ian J Fairchild, David Ferreira, Jason C Goodman, Galen P Halverson, Malte F Jansen, Guillaume Le Hir, Gordon D Love, Francis A Macdonald, Adam C Maloof, Camille A Partin, Gilles Ramstein, Brian E J Rose, Catherine V Rose, Peter M Sadler, Eli Tziperman, Aiko Voigt, Stephen G Warren
Geological evidence indicates that grounded ice sheets reached sea level at all latitudes during two long-lived Cryogenian (58 and ≥5 My) glaciations. Combined uranium-lead and rhenium-osmium dating suggests that the older (Sturtian) glacial onset and both terminations were globally synchronous. Geochemical data imply that CO2 was 10(2) PAL (present atmospheric level) at the younger termination, consistent with a global ice cover. Sturtian glaciation followed breakup of a tropical supercontinent, and its onset coincided with the equatorial emplacement of a large igneous province...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29128766/low-biodegradability-of-dissolved-organic-matter-and-trace-metals-from-subarctic-waters
#9
Olga V Oleinikova, Liudmila S Shirokova, Olga Y Drozdova, Sergey A Lapitskiy, Oleg S Pokrovsky
The heterotrophic mineralization of dissolved organic matter (DOM) controls the CO2 flux from the inland waters to the atmosphere, especially in the boreal waters, although the mechanisms of this process and the fate of trace metals associated with DOM remain poorly understood. We studied the interaction of culturable aquatic (Pseudomonas saponiphila) and soil (Pseudomonas aureofaciens) Gammaproteobacteria with seven different organic substrates collected in subarctic settings. These included peat leachate, pine crown throughfall, fen, humic lake, stream, river, and oligotrophic lake with variable dissolved organic carbon (DOC) concentrations (from 4 to 60mgL(-1))...
November 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29127793/pest-management-under-climate-change-the-importance-of-understanding-tritrophic-relations
#10
REVIEW
V Castex, M Beniston, P Calanca, D Fleury, J Moreau
Plants and insects depend on climatic factors (temperature, solar radiation, precipitations, relative humidity and CO2) for their development. Current knowledge suggests that climate change can alter plants and insects development and affect their interactions. Shifts in tritrophic relations are of particular concern for Integrated Pest Management (IPM), because responses at the highest trophic level (natural enemies) are highly sensitive to warmer temperature. It is expected that natural enemies could benefit from better conditions for their development in northern latitudes and IPM could be facilitated by a longer period of overlap...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29124092/dataset-of-the-livability-performance-of-the-city-of-birmingham-uk-as-measured-by-its-citizen-wellbeing-resource-security-resource-efficiency-and-carbon-emissions
#11
Joanne M Leach, Susan E Lee, Christopher T Boyko, Claire J Coulton, Rachel Cooper, Nicholas Smith, Hélène Joffe, Milena Büchs, James D Hale, Jonathan P Sadler, Peter A Braithwaite, Luke S Blunden, Valeria De Laurentiis, Dexter V L Hunt, AbuBakr S Bahaj, Katie Barnes, Christopher J Bouch, Leonidas Bourikas, Marianna Cavada, Andrew Chilvers, Stephen J Clune, Brian Collins, Ellie Cosgrave, Nick Dunn, Jane Falkingham, Patrick James, Corina Kwami, Martin Locret-Collet, Francesca Medda, Adriana Ortegon, Serena Pollastri, Cosmin Popan, Katerina Psarikidou, Nick Tyler, John Urry, Yue Wu, Victoria Zeeb, Chris D F Rogers
This data article presents the UK City LIFE1 data set for the city of Birmingham, UK. UK City LIFE1 is a new, comprehensive and holistic method for measuring the livable sustainability performance of UK cities. The Birmingham data set comprises 346 indicators structured simultaneously (1) within a four-tier, outcome-based framework in order to aid in their interpretation (e.g., promote healthy living and healthy long lives, minimize energy use, uncouple economic vitality from CO2 emissions) and (2) thematically in order to complement government and disciplinary siloes (e...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29081960/hybrid-photocathode-consisting-of-a-cugao2-p-type-semiconductor-and-a-ru-ii-re-i-supramolecular-photocatalyst-non-biased-visible-light-driven-co2-reduction-with-water-oxidation
#12
Hiromu Kumagai, Go Sahara, Kazuhiko Maeda, Masanobu Higashi, Ryu Abe, Osamu Ishitani
A CuGaO2 p-type semiconductor electrode was successfully employed for constructing a new hybrid photocathode with a Ru(ii)-Re(i) supramolecular photocatalyst (RuRe/CuGaO2). The RuRe/CuGaO2 photocathode displayed photoelectrochemical activity for the conversion of CO2 to CO in an aqueous electrolyte solution with a positive onset potential of +0.3 V vs. Ag/AgCl, which is 0.4 V more positive in comparison to a previously reported hybrid photocathode that used a NiO electrode instead of CuGaO2. A photoelectrochemical cell comprising this RuRe/CuGaO2 photocathode and a CoO x /TaON photoanode enabled the visible-light-driven catalytic reduction of CO2 using water as a reductant to give CO and O2 without applying any external bias...
June 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29077385/hexagonal-phase-cobalt-monophosphosulphide-for-highly-efficient-overall-water-splitting
#13
Zhengfei Dai, Hongbo Geng, Jiong Wang, Yubo Luo, Bing Li, Yun Zong, Jun Yang, Yuanyuan Guo, Yun Zheng, Xin Wang, Qingyu Yan
The rational design and synthesis of the non-precious, efficient, and stable electrocatalysts to replace the precious noble metals are crucial to the future of hydrogen economy. Herein, a partial-sulfurization/phosphorization strategy is proposed to synthesize a non-stoichiometric pyrrhotite-type cobalt monophosphosulphide material (Co0.9S0.58P0.42) with a hexagonal close packed (hcp) phase for electrocatalytic water splitting. By regulating the degree of sulfurization, the P/S atomic ratio in the cobalt monophosphosulphide can be tuned to activate the Co3+/Co2+ couples...
October 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/29065164/oxygen-uptake-during-functional-activities-after-stroke-reliability-and-validity-of-a-portable-ergospirometry-system
#14
Tor Ivar Gjellesvik, Berit Brurok, Arnt Erik Tjønna, Tom Tørhaug, Torunn Askim
BACKGROUND: People with stroke have a low peak aerobic capacity and experience increased effort during performance of daily activities. The purpose of this study was to examine test-retest reliability of a portable ergospirometry system in people with stroke during performance of functional activities in a field-test. Secondary aims were to examine the proportion of oxygen consumed during the field-test in relation to the peak-test and to analyse the correlation between the oxygen uptake during the field-test and peak-test in order to support the validity of the field-test...
2017: PloS One
https://www.readbyqxmd.com/read/29040433/low-end-tidal-co2-as-a-real-time-severity-marker-of-intra-anaesthetic-acute-hypersensitivity-reactions
#15
A Gouel-Chéron, L de Chaisemartin, F Jönsson, P Nicaise-Roland, V Granger, A Sabahov, M-T Guinnepain, S Chollet-Martin, P Bruhns, C Neukirch, D Longrois
Background: Prompt diagnosis of intra-anaesthetic acute hypersensitivity reactions (AHR) is challenging because of the possible absence and/or difficulty in detecting the usual clinical signs and because of the higher prevalence of alternative diagnoses. Delayed epinephrine administration during AHR, because of incorrect/delayed diagnosis, can be associated with poor prognosis. Low end-tidal CO2 (etCO2) is known to be linked to low cardiac output. Yet, its clinical utility during suspected intra-anaesthetic AHR is not well documented...
November 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/29026092/response-of-microbial-biomass-and-co2-c-loss-to-wetting-patterns-are-temperature-dependent-in-a-semi-arid-soil
#16
Yichao Rui, Deirdre B Gleeson, Daniel V Murphy, Frances C Hoyle
One of the greatest contemporary challenges in terrestrial ecology is to determine the impact of climate change on the world's ecosystems. Here we investigated how wetting patterns (frequency and intensity) and nutrient additions altered microbial biomass and CO2-C loss from a semi-arid soil. South-western Australia is predicted to experience declining annual rainfall but increased frequency of summer rainfall events when soil is fallow. Agricultural soils (0-10 cm at 10 °C or 25 °C) received the same total amount of water (15 mL over 30 days) applied at different frequency; with either nil or added nitrogen and phosphorus...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29025748/compromised-cerebrovascular-regulation-and-cerebral-oxygenation-in-pulmonary-arterial-hypertension
#17
Simon Malenfant, Patrice Brassard, Myriam Paquette, Olivier Le Blanc, Audrey Chouinard, Valérie Nadeau, Philip D Allan, Yu-Chieh Tzeng, Sébastien Simard, Sébastien Bonnet, Steeve Provencher
BACKGROUND: Functional cerebrovascular regulatory mechanisms are important for maintaining constant cerebral blood flow and oxygen supply in heathy individuals and are altered in heart failure. We aim to examine whether pulmonary arterial hypertension (PAH) is associated with abnormal cerebrovascular regulation and lower cerebral oxygenation and their physiological and clinical consequences. METHODS AND RESULTS: Resting mean flow velocity in the middle cerebral artery mean flow velocity in the middle cerebral artery (MCAvmean); transcranial Doppler), cerebral pressure-flow relationship (assessed at rest and during squat-stand maneuvers; analyzed using transfer function analysis), cerebrovascular reactivity to CO2, and central chemoreflex were assessed in 11 patients with PAH and 11 matched healthy controls...
October 12, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29020572/variability-in-the-primary-emissions-and-secondary-gas-and-particle-formation-from-vehicles-using-bio-ethanol-mixtures
#18
E Gramsch, V Papapostolou, F Reyes, Y Vásquez, M Castillo, P Oyola, G López, A Cádiz, S Ferguson, M Wolfson, J Lawrence, P Koutrakis
Bioethanol for use in vehicles is becoming a substantial part of global energy infrastructure because it is renewable and some emissions are reduced. Carbon monoxide (CO) emissions and total hydrocarbons (THC) are reduced but there is still controversy regarding emissions of nitrogen oxides (NOx), aldehydes and ethanol, this may be a concern because all these compounds are precursors of ozone and secondary organic aerosol (SOA). The amount of emissions depends on the ethanol content, but also may depend on the engine quality and ethanol origin...
October 11, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29018470/phakopsora-euvitis-causes-unusual-damage-to-leaves-and-modifies-carbohydrate-metabolism-in-grapevine
#19
Antonio F Nogueira Júnior, Rafael V Ribeiro, Beatriz Appezzato-da-Glória, Marli K M Soares, Júlia B Rasera, Lilian Amorim
Asian grapevine rust (Phakopsora euvitis) is a serious disease, which causes severe leaf necrosis and early plant defoliation. These symptoms are unusual for a strict biotrophic pathogen. This work was performed to quantify the effects of P. euvitis on photosynthesis, carbohydrates, and biomass accumulation of grapevine. The reduction in photosynthetic efficiency of the green leaf tissue surrounding the lesions was quantified using the virtual lesion concept (β parameter). Gas exchange and responses of CO2 assimilation to increasing intercellular CO2 concentration were analyzed...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28990307/physiological-dead-space-and-arterial-carbon-dioxide-contributions-to-exercise-ventilatory-inefficiency-in-patients-with-reduced-or-preserved-ejection-fraction-heart-failure
#20
Erik H Van Iterson, Bruce D Johnson, Barry A Borlaug, Thomas P Olson
AIMS: Patients with heart failure (HF) with reduced (HFrEF) or preserved (HFpEF) ejection fraction demonstrate an increased ventilatory equivalent for carbon dioxide (V̇E /V̇CO2 ) slope. The physiological correlates of the V̇E /V̇CO2 slope remain unclear in the two HF phenotypes. We hypothesized that changes in the physiological dead space to tidal volume ratio (VD /VT ) and arterial CO2 tension (PaCO2 ) differentially contribute to the V̇E /V̇CO2 slope in HFrEF vs. HFpEF. METHODS AND RESULTS: Adults with HFrEF (n = 32) and HFpEF (n = 27) [mean ± standard deviation (SD) left ventricular ejection fraction: 22 ± 7% and 61 ± 9%, respectively; mean ± SD body mass index: 28 ± 4 kg/m2 and 33 ± 6 kg/m2 , respectively; P < 0...
October 8, 2017: European Journal of Heart Failure
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