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https://www.readbyqxmd.com/read/28214548/global-stability-of-an-%C3%AE-ketoglutarate-dependent-dioxygenase-taud-and-its-related-complexes
#1
Kate L Henderson, Mingjie Li, Salette Martinez, Edwin A Lewis, Robert P Hausinger, Joseph P Emerson
BACKGROUND: TauD is a nonheme iron(II) and α-ketoglutarate (αKG) dependent dioxygenase, and a member of a broader family of enzymes that oxidatively decarboxylate αKG to succinate and carbon dioxide thereby activating O2 to perform a range of oxidation reactions. However before O2 activation can occur, these enzymes bind both substrate and cofactor in an effective manner. Here the thermodynamics associated with substrate and cofactor binding to FeTauD are explored. METHODS: Thermal denaturation of TauD and its enzyme-taurine, enzyme-αKG, and enzyme-taurine-αKG complexes are explored using circular dichroism (CD) spectroscopy and differential scanning calorimetry (DSC)...
February 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28212205/spontaneous-breathing-during-extracorporeal-membrane-oxygenation-in-acute-respiratory-failure
#2
Stefania Crotti, Nicola Bottino, Giulia Maria Ruggeri, Elena Spinelli, Daniela Tubiolo, Alfredo Lissoni, Alessandro Protti, Luciano Gattinoni
BACKGROUND: We evaluate the clinical feasibility of spontaneous breathing on extracorporeal membrane oxygenation and the interactions between artificial and native lungs in patients bridged to lung transplant or with acute exacerbation of chronic obstructive pulmonary disease (COPD) or acute respiratory distress syndrome. METHODS: The clinical course of a total of 48 patients was analyzed. Twenty-three of 48 patients were enrolled in the prospective study (nine bridged to lung transplant, six COPD, and eight acute respiratory distress syndrome)...
February 17, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28211683/the-central-role-of-bicarbonate-in-the-electrochemical-re-duction-of-carbon-dioxide-on-gold
#3
Marco Dunwell, Qi Lu, Jeffrey M Heyes, Jonathan Rosen, Jingguang G Chen, Yushan Yan, Feng Jiao, Bingjun Xu
Much effort has been devoted in the development of efficient catalysts for electrochemical reduction of CO2. Molecular level understanding of electrode-mediated process, particularly the role of bicarbonate in increasing CO2 reduction rates, is still lacking due to the difficulty of directly probing the electrochemical interface. We developed a protocol to observe normally invisible reaction intermediates with a surface enhanced spectroscopy by applying square-wave potential profiles. Further, we demonstrate that bicarbonate, through equilibrium exchange with dissolved CO2, rather than the supplied CO2, is the primary source of carbon in the CO formed at the Au electrode by a combination of in-situ spectroscopic, isotopic labeling, and mass spectroscopic investigations...
February 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28211120/the-effect-of-sevoflurane-on-electrocorticographic-spike-activity-in-pediatric-patients-with-epilepsy
#4
Shigekazu Tanaka, Yutaka Oda, Masayoshi Ryokai, Takehiro Uda, Noritsugu Kunihiro, Ichiro Kuki, Ryu Okutani
BACKGROUND: Electrocorticogram (ECoG) spike activity is enhanced under general anesthesia with 1.5 minimum alveolar concentration (MAC) sevoflurane compared with lower concentrations in adult patients with epilepsy. However, the effect of concentration of sevoflurane on ECoG in children with epilepsy is less known. AIMS: The primary endpoint was to investigate the effects of sevoflurane on ECoG spike activity in pediatric patients undergoing epilepsy surgery. The secondary endpoint was to examine its effects on baseline ECoG including burst suppression...
February 17, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28210805/transcutaneous-carbon-dioxide-application-accelerates-muscle-injury-repair-in-rat-models
#5
Shiho Akahane, Yoshitada Sakai, Takeshi Ueha, Hanako Nishimoto, Miho Inoue, Takahiro Niikura, Ryosuke Kuroda
PURPOSE: Skeletal muscle injuries are commonly observed in sports and traumatology medicine. Previously, we demonstrated that transcutaneous application of carbon dioxide (CO2) to lower limbs increased the number of muscle mitochondria and promoted muscle endurance. Therefore, we aimed to investigate whether transcutaneous CO2 application could enhance recovery from muscle injury. METHODS: Tibialis anterior muscle damage was induced in 27 Sprague Dawley rats via intramuscular injection of bupivacaine...
February 16, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28210501/perioperative-concerns-for-profound-metabolic-alkalosis-during-kidney-transplantation-a-case-report
#6
Jung Ju Choi, Yong Beom Kim, Hong Soon Kim, Kyung Cheon Lee, Youn Yi Jo
INTRODUCTION: Profound metabolic alkalosis is an uncommon consideration for the anesthetic management of kidney transplantation. Serum total carbon dioxide content and complex electrolyte abnormalities might be important diagnostic clues for the presence of metabolic alkalosis in the absence of arterial blood gas analysis. CASE PRESENTATION: A 34-year-old female visited Gachon University Gil Medical Center, Incheon, South Korea during year 2015. She experienced aggravated renal function due to chronic hypokalemia and severe hypochloremic metabolic alkalosis, induced by laxative abuse, and underwent ABO incompatible kidney transplantation...
November 2016: Iranian Red Crescent Medical Journal
https://www.readbyqxmd.com/read/28210319/physiology-of-respiratory-disturbances-in-muscular-dystrophies
#7
Antonella Lo Mauro, Andrea Aliverti
: Muscular dystrophy is a group of inherited myopathies characterised by progressive skeletal muscle wasting, including of the respiratory muscles. Respiratory failure, i.e. when the respiratory system fails in its gas exchange functions, is a common feature in muscular dystrophy, being the main cause of death, and it is a consequence of lung failure, pump failure or a combination of the two. The former is due to recurrent aspiration, the latter to progressive weakness of respiratory muscles and an increase in the load against which they must contract...
December 2016: Breathe
https://www.readbyqxmd.com/read/28209740/quantitative-mri-volumetry-diffusivity-cerebrovascular-flow-and-cranial-hydrodynamics-during-head-down-tilt-and-hypercapnia-the-spacecot-study
#8
Larry Allen Kramer, Khader M Hasan, Ashot E Sargsyan, Karina Marshall-Goebel, Jörn Rittweger, Dorit Donoviel, Saki Higashi, Benson Mwangi, Darius A Gerlach, Eric M Bershad
PURPOSE: In order to improve the pathophysiologic understanding of visual changes observed in astronauts, we aimed to use quantitative MRI to measure anatomic and physiologic responses during a ground-based spaceflight analogue (head down tilt, HDT) combined with increased ambient carbon dioxide (CO2). METHODS: Six healthy, male subjects participated in the double-blinded, randomized cross-over design study with two conditions: 26.5 h of -12° HDT with ambient air and with 0...
February 16, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28209454/treatment-of-carcinoma-in-situ-of-the-glans-penis-with-topical-imiquimod-followed-by-carbon-dioxide-laser-excision
#9
Tullio Torelli, Mario A Catanzaro, Nicola Nicolai, Patrizia Giannatempo, Andrea Necchi, Daniele Raggi, Biagio Paolini, Maurizio Colecchia, Luigi Piva, Davide Biasoni, Silvia Stagni, Antonio Tesone, Roberto Salvioni
BACKGROUND: Different approaches have been described in published studies for carcinoma in situ (CIS) of the glans penis (erythroplasia of Queyrat), including topical chemotherapy or immunotherapy and laser or surgical excision. We evaluated the efficacy of topical imiquimod (IQ) followed by carbon dioxide laser ablation of the lesion. PATIENTS AND METHODS: From 2010 to 2015, 10 patients affected by CIS of the glans were treated by IQ, followed by carbon dioxide laser ablation...
January 18, 2017: Clinical Genitourinary Cancer
https://www.readbyqxmd.com/read/28208249/flexible-passive-near-field-communication-tag-for-multigas-sensing
#10
P Escobedo, M M Erenas, N López-Ruiz, M A Carvajal, S Gonzalez-Chocano, I de Orbe-Payá, L F Capitán-Valley, A J Palma, A Martínez-Olmos
In this work we present a full-passive flexible multigas sensing tag for the determination of oxygen, carbon dioxide, ammonia, and relative humidity readable by a smartphone. This tag is based on near field communication (NFC) technology for energy harvesting and data transmission to a smartphone. The gas sensors show an optic response that is read through high-resolution digital color detectors. A white LED is used as the common optical excitation source for all the sensors. Only a reduced electronics with very low power consumption is required for the reading of the optical responses and data transmission to a remote user...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28208177/feasibility-and-associated-limitations-of-office-based-laryngeal-surgery-using-carbon-dioxide-lasers
#11
Hao-Chun Hu, Shu-Yi Lin, Yi-Ting Hung, Shyue-Yih Chang
Importance: There are few reports evaluating awake, office-based carbon dioxide (CO2) laser surgery for laryngeal lesions. To date, this study was the largest reported case series of office-based laryngeal surgery by fiber delivery CO2 laser. Office-based laryngeal surgical procedures have become increasingly popular. Technical problems and treatment outcomes associated with the use of a CO2 laser for office-based laryngeal surgery have yet to be fully addressed. Objectives: To discuss a single institution's clinical experience with office-based CO2 laser laryngeal surgery and the feasibility and limitations associated with this procedure...
February 16, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28208164/use-of-the-carbon-dioxide-laser-as-an-office-based-surgical-tool-an-old-dog-can-do-a-new-ish-trick
#12
Noah P Parker
No abstract text is available yet for this article.
February 16, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28207828/the-wide-spectrum-high-biocidal-potency-of-bioxy-formulation-when-dissolved-in-water-at-different-concentrations
#13
Dori Dagher, Ken Ungar, Richard Robison, Fadi Dagher
Traditional surface disinfectants that have long been applied in medicine, animal husbandry, manufacturing and institutions are inconvenient at best and dangerous at worst. Moreover, some of these substances have adverse environmental impacts: for example, quaternary ammonium compounds ("quats") are reproductive toxicants in both fish and mammals. Halogens are corrosive both to metals and living tissues, are highly reactive, can be readily neutralized by metals, and react with organic matter to form toxic, persistent by-products such as dioxins and furans...
2017: PloS One
https://www.readbyqxmd.com/read/28207338/nutritional-economic-and-environmental-costs-of-milk-waste-in-a-classroom-school-breakfast-program
#14
Stacy A Blondin, Sean B Cash, Jeanne P Goldberg, Timothy S Griffin, Christina D Economos
OBJECTIVES: To measure fluid milk waste in a US School Breakfast in the Classroom Program and estimate its nutritional, economic, and environmental effects. METHODS: Fluid milk waste was directly measured on 60 elementary school classroom days in a medium-sized, urban district. The US Department of Agriculture nutrition database, district cost data, and carbon dioxide equivalent (CO2e) emissions and water footprint estimates for fluid milk were used to calculate the associated nutritional, economic, and environmental costs...
February 16, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28206761/molecular-cobalt-complexes-with-pendant-amines-for-selective-electrocatalytic-reduction-of-carbon-dioxide-to-formic-acid
#15
Souvik Roy, Bhaskar Sharma, Jacques Pecaut, Philippe Simon, Marc Fontecave, Phong D Tran, Etienne Derat, Vincent Artero
We report here on a new series of CO2-reducing molecular catalysts based on Earth-abundant elements that are very selective for the production of acid formic in DMF/water mixtures (Faradaic efficiency of 90±10%) at moderate overpotentials (500-700 mV in DMF measured at the middle of the catalytic wave). The [CpCo(PR2NR'2)I]+compounds contain diphosphine ligands PR2NR'2 with two pendent amine residues that act as proton relays during CO2 reduction catalysis and tune their activity. Four different PR2NR'2 ligands with cyclohexyl or phenyl substituents on phosphorus and benzyl or phenyl substituents on nitrogen were employed and the compound with the most electron-donating phosphine ligand and the most basic amine functions performs best among the series with turnover frequency >1000 s 1...
February 16, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28202652/effects-of-elevated-carbon-dioxide-and-temperature-on-locomotion-and-the-repeatability-of-lateralization-in-a-keystone-marine-mollusc
#16
Paolo Domenici, Rodrigo Torres, Patricio H Manríquez
Recent work has shown that the behaviour of marine organisms can be affected by elevated PCO2 , although little is known about the effect of multiple stressors. We therefore investigated the effect of elevated PCO2  and temperature on locomotion and behaviour during prey searching in the marine gastropod Concholepas concholepas, a predator characteristic of the southeastern Pacific coast. Movement duration, decision time, route finding and lateralization were measured using a T-maze tank with a prey positioned behind a barrier...
February 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28202108/-clinical-efficacy-of-pulmonary-surfactant-combined-with-budesonide-for-preventing-bronchopulmonary-dysplasia-in-very-low-birth-weight-infants
#17
Jing Pan, Ming-Wu Chen, Wen-Quan Ni, Tao Fang, Hui Zhang, Ye Chen, Jia-Hua Pan
OBJECTIVE: To explore the clinical efficacy of intratracheal instillation of pulmonary surfactant (PS) combined with budesonide for preventing bronchopulmonary dysplasia (BPD) in very low birth weight (VLBW) infants. METHODS: Thirty VLBW infants with gestational age <32 weeks who developed neonatal respiratory distress syndrome (NRDS) (grade III-IV) suffering from intrauterine infection were randomly assigned into a PS + budesonide group and a PS alone group...
February 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28199079/heterogeneous-tio2-v2o5-carbon-nanotube-electrodes-for-lithium-ion-batteries
#18
Mert Kurttepeli, Shaoren Deng, Felix Mattelaer, Daire J Cott, Philippe Vereecken, Jolien Dendooven, Christophe Detavernier, Sara Bals
Vanadium pentoxide (V2O5) is proposed and investigated as a cathode material for lithium ion batteries. However, the dissolution of V2O5 during the charge/discharge remains as an issue at the V2O5-electrolyte interface. In this work, we present a heterogeneous nanostructure with carbon nanotubes supported V2O5/titanium dioxide (TiO2) multilayers as electrodes for thin-film Li-ion batteries. Atomic layer deposition of V2O5 on carbon nanotubes provides enhanced Li storage capacity and high rate performance. An additional TiO2 layer leads to increased morphological stability and in return higher cycling performance of V2O5/carbon nanotubes...
February 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28198376/selective-sulfur-dioxide-adsorption-on-crystal-defect-sites-on-an-isoreticular-metal-organic-framework-series
#19
L Marleny Rodríguez-Albelo, Elena López-Maya, Said Hamad, A Rabdel Ruiz-Salvador, Sofia Calero, Jorge A R Navarro
The widespread emissions of toxic gases from fossil fuel combustion represent major welfare risks. Here we report the improvement of the selective sulfur dioxide capture from flue gas emissions of isoreticular nickel pyrazolate metal organic frameworks through the sequential introduction of missing-linker defects and extra-framework barium cations. The results and feasibility of the defect pore engineering carried out are quantified through a combination of dynamic adsorption experiments, X-ray diffraction, electron microscopy and density functional theory calculations...
February 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28198069/ultrapulse-carbon-dioxide-laser-treatment-for-bilateral-facial-nevus-comedonicus-a-case-report
#20
Caiyong Zhu, Aijuan Sun
Nevus comedonicus (NC), a rare skin ailment with an aggregation of dilated follicular orifices filled with keratinous material, is difficult to treat. Several drugs have been assessed for the treatment of NC, but with limited success. Surgery requires much experience and the recurrence rate is high. Various types of laser have been tried, with promising outcomes. A 54-year-old male patient with bilateral facial NC was admitted on July 8, 2014. A coin-sized area was first treated successfully with ultrapulse CO2 laser...
February 15, 2017: Dermatologic Therapy
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