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https://www.readbyqxmd.com/read/28092441/local-mode-analysis-decoding-ir-spectra-by-visualizing-molecular-details
#1
Matthias Massarczyk, Till Rudack, Jürgen Schlitter, Jens Kuhne, Carsten Kötting, Klaus Gerwert
Integration of experimental and computational approaches to investigate chemical reactions in proteins has proven to be very successful. Experimentally, time-resolved FTIR difference-spectroscopy monitors chemical reactions at atomic detail. To decode detailed structural information encoded in IR spectra, QM/MM calculations are performed. Here, we present a novel method which we call Local Mode Analysis (LMA) for calculating IR spectra and assigning spectral IR bands on the basis of movements of nuclei and partial charges from just a single QM/MM trajectory...
January 16, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28088553/the-influence-of-landmark-stability-on-control-by-occasion-setters
#2
REVIEW
Lauren M Cleland, Chad M Ruprecht, Ronnie V Lee, Kenneth J Leising
In an operant serial feature-positive procedure, an occasion setter (OSX) signals that a response will be reinforced in the presence of second stimulus (e.g., a discriminative stimulus, A). During a transfer test, the OS is paired with a different discriminative stimulus. Experiment 1a tested transfer effects in a touchscreen-based spatial occasion setting task with pigeons. During training, four OSs (OSW, OSX, OSY, and OSZ) were paired on separate trials with landmark A (LMA) or B (LMB) and the opportunity for a reinforced response one location to the immediate left (R1) or right (R2) of the LM (OSW→LMA:R1, OSX→LMA:R2, OSY→LMB:R1, OSZ→LMB:R2)...
January 11, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28078762/competence-in-the-use-of-supraglottic-airways-by-australian-surf-lifesavers-for-cardiac-arrest-ventilation-in-a-manikin
#3
Lachlan Holbery-Morgan, Cara Angel, Michelle Murphy, James Carew, Finn Douglas, Robert Murphy, Natalie Hood, Andrew Rechtman, Christopher Scarff, Nicholas Simpson, Andrew Stewardson, Daniel Steinfort, Sam Radford, Ned Douglas, Douglas Johnson
OBJECTIVES: Lifesavers in Australia are taught to use pocket mask (PM) rescue breathing and bag valve mask (BVM) ventilation, despite evidence that first responders might struggle with these devices. Novices have successfully used the Laryngeal Mask Airway (LMA) Supreme and iGel devices previously, but there has been no previous comparison of the ability to train lifesavers to use the supraglottic airways compared to standard techniques for cardiac arrest ventilation. METHODS: The study is a prospective educational intervention whereby 113 lifesavers were trained to use the LMA and iGel supraglottic airways...
January 11, 2017: Emergency Medicine Australasia: EMA
https://www.readbyqxmd.com/read/28072732/comparison-of-the-i-gel-and-other-supraglottic-airways-in-adult-manikin-studies-systematic-review-and-meta-analysis
#4
Jiwon An, Sang Beom Nam, Jong Seok Lee, Jinae Lee, Hanna Yoo, Hye Mi Lee, Min-Soo Kim
BACKGROUND: The i-gel has a gel-like cuff composed of thermoplastic elastomer that does not require cuff inflation. As the elimination of cuff inflation may shorten insertion time, the i-gel might be a useful tool in emergency situations requiring prompt airway care. This systematic review and meta-analysis of previous adult manikin studies for inexperienced personnel was performed to compare the i-gel with other supraglottic airways. METHODS: We searched PubMed, the Cochrane Library, and EMBASE for eligible randomized controlled trials (RCTs) published before June 2015, including with a crossover design, using the following search terms: "i-gel," "igel," "simulation," "manikin," "manikins," "mannequin," and "mannequins...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28066834/the-role-of-ventilation-mode-using-a-laryngeal-mask-airway-during-gynecological-laparoscopy-on-lung-mechanics-hemodynamic-response-and-blood-gas-analysis
#5
Mohammad Hossein Jarahzadeh, Iman Halvaei, Farshid Rahimi-Bashar, Shekoufeh Behdad, Rouhollah Abbasizadeh Nasrabady, Elahe Yasaei
BACKGROUND: There are two methods for ventilation in gynecological laparoscopy: volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV). OBJECTIVE: To compare the lung mechanics, hemodynamic response and arterial blood gas analysis and gas exchange of two modes of VCV and PCV using laryngeal mask airway (LMA) at different time intervals. MATERIALS AND METHODS: Sixty infertile women referred for diagnostic laparoscopy, based on ventilation mode, were randomly divided into two groups of VCV (tidal volume: 10 ml/kg) and PCV...
December 2016: International Journal of Reproductive Biomedicine (Yazd, Iran)
https://www.readbyqxmd.com/read/28060769/pbse-quantum-dot-based-luminescent-solar-concentrators
#6
Dennis L Waldron, Amanda Preske, Joseph Zawodny, Todd Krauss, Mool Gupta
The results are presented for luminescent solar concentrators (LSCs) fabricated with poly(lauryl methacrylate-co-ethylene glycol dimethacrylate) (P(LMA-co-EGDMA)) and Angstrom Bond, Inc. AB9093 acrylic epoxy matrix, high quantum yield (> 70%) PbSe quantum dots (QDs) and silicon photovoltaic (Si PV) cells. LSCs were tested under a lamp with broadband illumination, photon flux-matched to a standard solar spectrum and verified under a calibrated solar lamp source. The P(LMA-co-EGDMA) sample demonstrated the highest power conversion efficiency of any known LSC fabricated with either QDs or Si PV cells, 4...
January 6, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28058722/cell-level-anatomical-characteristics-explain-high-mesophyll-conductance-and-photosynthetic-capacity-in-sclerophyllous-mediterranean-oaks
#7
José Javier Peguero-Pina, Sergio Sisó, Jaume Flexas, Jeroni Galmés, Ana García-Nogales, Ülo Niinemets, Domingo Sancho-Knapik, Miguel Ángel Saz, Eustaquio Gil-Pelegrín
Leaf mass per area (LMA) has been suggested to negatively affect the mesophyll conductance to CO2 (gm ), which is the most limiting factor for area-based photosynthesis (AN ) in many Mediterranean sclerophyll species. However, despite their high LMA, these species have similar AN to plants from other biomes. Variations in other leaf anatomical traits, such as mesophyll and chloroplast surface area exposed to intercellular air space (Sm /S and Sc /S), may offset the restrictions imposed by high LMA in gm and AN in these species...
January 6, 2017: New Phytologist
https://www.readbyqxmd.com/read/28050480/comparison-of-dexmedetomidine-propofol-versus-fentanyl-propofol-on-insertion-conditions-of-proseal-laryngeal-mask-airway
#8
Shalaka Sandeep Nellore, Abhijeet Dattatray Waychal, Preeti Sachin Rustagi
INTRODUCTION: Proseal Laryngeal Mask Airway (PLMA) is a newer supraglottic airway device that requires adequate depth of anaesthesia and suppression of upper airway reflexes thereby providing optimal insertion conditions. AIM: To compare dexmedetomidine and fentanyl for co-induction with propofol with respect to PLMA insertion conditions, haemodynamic variation and the total dose requirement of propofol. MATERIALS AND METHODS: This was a prospective randomized double-blinded study conducted in 60 cases of American Society of Anaesthesiologists (ASA) class I/II undergoing elective surgery under general anaesthesia...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28018681/unilateral-vocal-cord-paralysis-following-insertion-of-a-supreme-laryngeal-mask-in-a-patient-with-sj%C3%A3-gren-s-syndrome
#9
T O J Masarwa, I H F Herold, M Tabor, R A Bouwman
Since its introduction in 1988 by Dr. Archie Brain, the laryngeal mask airway (LMA) is being used with increasing frequency. Its ease of use has made it a very popular device in airway management and compared to endotracheal intubation it is less invasive. The use of LMA was on the rise, so has been the incidence of its related complications. We report severe unilateral vocal cord paralysis following the use of the supreme laryngeal mask (sLMA) in a patient with Sjögren's syndrome. In addition, we propose possible mechanisms of injury, review the existing case reports, and discuss our findings...
2016: Case Reports in Anesthesiology
https://www.readbyqxmd.com/read/28004199/the-effect-of-esophagogastroduodenoscopy-probe-insertion-on-the-intracuff-pressure-of-airway-devices-in-children-during-general-anesthesia
#10
Onur Balaban, Mineto Kamata, Mumin Hakim, Dmitry Tumin, Joseph D Tobias
Given the size of the esophagogastroduodenoscopy (EGD) probe and the compressibility of the pediatric airway, the EGD probe may increase the intracuff pressure (IP) of an airway device. The current study evaluated IP changes during EGD examination under general anesthesia in pediatric patients. Following the induction of anesthesia, a laryngeal mask airway (LMA) or endotracheal tube (ETT) was placed without neuromuscular blockade. The IP was measured at baseline, during EGD probe insertion, while the EGD probe was in place, and after probe removal...
December 21, 2016: Journal of Anesthesia
https://www.readbyqxmd.com/read/27991884/global-leaf-trait-estimates-biased-due-to-plasticity-in-the-shade
#11
Trevor F Keenan, Ülo Niinemets
The study of leaf functional trait relationships, the so-called leaf economics spectrum(1,2), is based on the assumption of high-light conditions (as experienced by sunlit leaves). Owing to the exponential decrease of light availability through canopies, however, the vast majority of the world's vegetation exists in at least partial shade. Plant functional traits vary in direct dependence of light availability(3), with different traits varying to different degrees, sometimes in conflict with expectations from the economic spectrum(3)...
December 19, 2016: Nature Plants
https://www.readbyqxmd.com/read/27975923/resorcylic-lactones-from-lasiodiplodia-theobromae-mub65-a-fungal-endophyte-isolated-from-myracrodruon-urundeuva
#12
Acm Sobreira, Odl Pessoa, Kgd Florêncio, D V Wilke, Fco Freire, Fjt Gonçalves, Prv Ribeiro, Lma Silva, E S Brito, K M Canuto
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27889843/a-randomized-comparison-of-the-ambu-auragain-versus-the-lma-supreme-in-patients-undergoing-gynaecologic-laparoscopic-surgery
#13
Ana M Lopez, Merce Agusti, Pedro Gambus, Montserrat Pons, Teresa Anglada, Ricard Valero
Second generation supraglottic airway devices providing high seal airway pressures are suitable for patients undergoing gynecologic laparoscopy. We compared the seal pressure achieved by the new Ambu AuraGain™ versus LMA Supreme™ following pneumoperitoneum in the Trendelenburg position. Sixty female patients were randomly allocated to ventilation with either the AuraGain or the Supreme. A target-controlled system was used to administer total intravenous anesthesia. Intracuff pressure was maintained below 60 cm H2O...
November 26, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27871600/comparison-of-a-new-visual-stylet-discopo-guided-laryngeal-mask-airway-placement-vs-conventional-blind-technique-a-prospective-randomized-study
#14
Linlin Zhao, Junfeng Zhang, Quanhong Zhou, Wei Jiang
STUDY OBJECTIVE: To compare the ease of laryngeal mask airway (LMA) insertion and fiberoptic view of LMA after placement using the Discopo visual stylet-guided insertion and conventional blind technique. DESIGN: Prospective, randomized controlled study. SETTING: Operating room in a university hospital. PATIENTS: One hundred adult patients scheduled for elective surgery under LMA general anesthesia were enrolled. INTERVENTIONS: Patients were randomly allocated to 2 groups: GLMA group using a visual stylet-guided technique (n=50) and BLMA group using standard blind technique (n=50)...
December 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27866188/feasibility-of-laryngeal-mask-airway-device-placement-in-neonates
#15
Amanda A Wanous, Andrew Wey, Kyle D Rudser, Kari D Roberts
BACKGROUND: The laryngeal mask airway (LMA) has been used in adult and pediatric populations for decades. While the familiarity of its use in the neonatal population is increasing, there are few data investigating this. OBJECTIVE: The objective of this study was to determine the feasibility of LMA placement in neonates by investigating the time and number of attempts required for successful placement and physiologic stability during the placement of the device. METHODS: This study is one component of a national, multicenter, randomized controlled trial investigating surfactant administration through an LMA in neonates...
November 19, 2016: Neonatology
https://www.readbyqxmd.com/read/27863730/psoas-muscle-area-and-length-of-stay-in-older-adults-undergoing-cardiac-operations
#16
Jesse Zuckerman, Matthew Ades, Louis Mullie, Amanda Trnkus, Jean-Francois Morin, Yves Langlois, Felix Ma, Mark Levental, José A Morais, Jonathan Afilalo
BACKGROUND: Frailty assessment can help predict which older adults will experience adverse events after cardiac surgical procedures. Low muscle mass is a core component of frailty that is suboptimally captured by self-reported weight loss; refined measures using computed tomographic (CT) images have emerged and are predictive of outcomes in noncardiac surgical procedures. The objective of this study was to evaluate the association between CT muscle area and length of stay (LOS) after cardiac surgical procedures...
November 15, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27861696/a-cadaver-study-comparing-three-fibreoptic-assisted-techniques-for-converting-a-supraglottic-airway-to-a-cuffed-tracheal-tube
#17
B L Olesnicky, A Rehak, W B Bestic, J T Brock, L Watterson
After rescuing an airway with a supraglottic airway device, a method to convert it to a cuffed tracheal tube is often needed. The best method to do this has never been directly studied. We compared three techniques for conversion of a standard LMA(®) Unique airway to a cuffed endotracheal tube using a fibrescope. The primary endpoint was time to intubation, with secondary endpoints of success rate, perceived difficulty and preferred technique. We also investigated the relationship between level of training and prior training and experience with the techniques on the primary outcome...
November 11, 2016: Anaesthesia
https://www.readbyqxmd.com/read/27859952/strong-thermal-acclimation-of-photosynthesis-in-tropical-and-temperate-wet-forest-tree-species-the-importance-of-altered-rubisco-content
#18
Andrew P Scafaro, Shuang Xiang, Benedict M Long, Nur H A Bahar, Lasantha K Weerasinghe, Danielle Creek, John R Evans, Peter B Reich, Owen K Atkin
Understanding of the extent of acclimation of light-saturated net photosynthesis (An ) to temperature (T), and associated underlying mechanisms, remains limited. This is a key knowledge gap given the importance of thermal acclimation for plant functioning, both under current and future higher temperatures, limiting the accuracy and realism of Earth system model (ESM) predictions. Given this, we analysed and modelled T-dependent changes in photosynthetic capacity in 10 wet-forest tree species: six from temperate forests and four from tropical forests...
November 16, 2016: Global Change Biology
https://www.readbyqxmd.com/read/27847515/the-ambu%C3%A2-aura-i%C3%A2-laryngeal-mask-and-lma-supreme%C3%A2-a-randomized-trial-of-clinical-performance-and-fibreoptic-positioning-in-unparalysed-anaesthetised-patients-by-novices
#19
Zanahriah Yahaya, Wendy H Teoh, Nora A Dintan, Ravi Agrawal
Introduction. Manikin studies' data cannot accurately be extrapolated to real-life scenarios and inherent differences in design and materials of newer products may affect their clinical performance. Methods. Hence, we compared the AMBU® Aura-i™ and LMA Supreme™ in this randomized trial involving 100 ASA 1-2 unparalysed anaesthetised patients undergoing minor gynaecological surgery. Investigators had <20 Aura-i insertions. Primary outcome was time to achieve effective ventilation and secondarily insertion parameters, oropharyngeal leak pressures (OLP), fibreoptic positioning, and pharyngeal morbidity...
2016: Anesthesiology Research and Practice
https://www.readbyqxmd.com/read/27843359/a-new-laryngeal-mask-supraglottic-airway-device-with-integrated-balloon-line-a-descriptive-and-comparative-bench-study
#20
YingHai Zhou, Korinne Jew
Laryngeal masks are invasive devices for airway management placed in the supraglottic position. The Shiley™ laryngeal mask (Shiley™ LM) features an integrated inflation tube and airway shaft to facilitate product insertion and reduce the chance of tube occlusion when patients bite down. This study compared the Shiley LM to two other disposable laryngeal mask devices, the Ambu(®) AuraStraight™ and the LMA Unique™. Overall device design, tensile strength, flexibility of various structures, and sealing performance were measured...
2016: Medical Devices: Evidence and Research
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