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Clemencia Ovalle-Bracho, Carolina Camargo, Yira Díaz-Toro, Marcela Parra-Muñoz
INTRODUCTION: Multilocus enzyme electrophoresis (MLEE) is the reference standard for the characterization of Leishmania species. The test is restricted to specialized laboratories due to its technical complexity, cost, and time required to obtain results. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) is used to identify Leishmania species. OBJECTIVE: To establish the concordance between the two tests as identifying methods for circulating species in Colombia...
March 15, 2018: Biomédica: Revista del Instituto Nacional de Salud
Nelson José Alvis, Diana Patricia Díaz, Liliana Castillo, Nelson Rafael Alvis, María Isabel Bermúdez, Olga Maritza Berrío, Mauricio Beltrán, Carlos Andrés Castañeda-Orjuela
INTRODUCTION: Transfusion is a mechanism of transmission of Chagas' disease. There are no studies on the costs of the screening test in Colombian blood banks. OBJECTIVE: To estimate the costs of the screening test for Chagas' disease among blood donors in two Colombian blood banks, 2015. MATERIALS AND METHODS: We conducted a micro-costing study from the perspective of the health care provider to estimate the cost of Chagas' disease testing in two blood banks, Banco de Sangre de la Cruz Roja, Seccional Bolívar, and Banco de Sangre del Hospital de Yopal, Casanare, taking into account four cost categories: 1) Administrative costs: public services and insurance costs were calculated based on the blood bank area in square meters; 2) capital costs: building and equipment costs that were annualized using a 3% discount rate and a lifespan of 20 years for building and five for equipment; 3) costs of Chagas' disease test materials and reagents adjusted by blood bank production level, and 4) costs of staff in charge of Chagas' disease test processing...
March 15, 2018: Biomédica: Revista del Instituto Nacional de Salud
Simon J Pope, Thomas Stonelake, Kaitlin Phillips, Simon Coles, Peter Horton, Shannon Keane, Emily Stokes, Ian Fallis, Joseph Beames, Jianzhang Zhao, Kepeng Chen, Yuqi Hou, Andrew Hallett, Sean O'Kell
A series of substituted 2-phenylquinoxaline ligands have been explored to finely tune the visible emission properties of a corresponding set of cationic, cyclometalated iridium(III) complexes. The electronic and redox properties of the complexes were investigated using experimental (including time-resolved luminescence and transient absorption spectroscopy) and theoretical methods. The complexes display absorption and phosphorescent emission in the visible region attributed to MLCT transitions. The different substitution patterns of the ligands induce variations in these parameters...
April 18, 2018: Chemistry: a European Journal
Tracey Bushnik, Michael Tjepkema, Laurent Martel
BACKGROUND: Over the past century, life expectancy at birth in Canada has risen substantially. However, these gains in the quantity of life say little about gains in the quality of life. DATA AND METHODS: Health-adjusted life expectancy (HALE), an indicator of quality of life, was estimated for the household and institutional populations combined every four years from 1994/1995 to 2015. Health status was measured by the Health Utilities Index Mark 3 instrument in two national population health surveys, and was used to adjust life expectancy...
April 18, 2018: Health Reports
Yuzhen Liang, Tifany L Torralba-Sanchez, Dominic M Di Toro
Polyparameter Linear Free Energy Relationships (pp-LFERs) using Abraham system parameters have many useful applications. However, developing the Abraham system parameters depends on the availability and quality of the Abraham solute parameters. Using Quantum Chemically estimated Abraham solute Parameters (QCAP) is shown to produce pp-LFERs that have lower root mean square errors (RMSEs) of predictions for solvent-water partition coefficients than parameters that are estimated using other presently available methods...
April 18, 2018: Environmental Science. Processes & Impacts
Natalia Sergeeva, Alexander N Chaika, Brian Walls, Barry Murphy, Killian Walshe, David Martin, Billy D O Richards, Gin Jose, K Fleischer, Victor Aristov, Olga Molodtsova, Igor V Shvets, Sergey Krasnikov
Herein, we report a simple method for a covalent modification of surface-supported graphene with photoactive dyes. Graphene was fabricated on cubic-SiC/Si(001) wafers due to their low cost and suitability for mass-production of continuous graphene fit for electronic applications on millimetre scale. Functionalisation of the graphene surface was carried out in solution via white light-induced photochemical generation of phenazine radicals from phenazine diazonium salt. The resulting covalently bonded phenazine-graphene hybrid structure was characterised by scanning tunnelling microscopy (STM) and spectroscopy (STS), Raman spectroscopy and density functional theory (DFT) calculations...
April 18, 2018: Nanotechnology
Veronica Cabanas-Sanchez, Sara Higueras-Fresnillo, Miguel Ángel De La Camara, Oscar L Veiga, David Martinez-Gomez
The aims of the present study were: (i) to develop automated algorithms to identify the sleep period time in 24-h data from the Intelligent Device for Energy Expenditure and Activity (IDEEA) in older adults, and (ii) to analyze the agreement of these algorithms to identify the sleep period time as compared to self-reported data and expert visual analysis of accelerometer raw data.
 Approach. This study comprised 50 participants, aged 65 to 85 years. Fourteen automated algorithms were developed. Participants reported their bedtime and wake time in the days wearing the device...
April 18, 2018: Physiological Measurement
Debasish Panigrahi, Saibal Roychowdhury, Rahul Guhabiswas, Emmanuel Rupert, Mrinalendu Das, Pradeep Narayan
Background This study was designed to compare myocardial protection with del Nido cardioplegia and conventional blood cardioplegia in children undergoing cardiac surgery in Risk Adjustment for Congenital Heart Surgery categories 1 and 2. Methods Sixty patients were randomized into 2 groups receiving del Nido cardioplegia solution or conventional blood cardioplegia. Myocardial injury was assessed using biochemical markers (troponin I and creatine kinase-MB). Vasoactive-inotropic scores were calculated to compare inotropic requirements...
January 1, 2018: Asian Cardiovascular & Thoracic Annals
Shijia Wang, Jia Liu, Feng Yuan, Xiaojun Chen, Fenghua Ma, Guofu Zhang, Xiaomei Tian
Background Better selection of patients with intermediate and high-risk stage I endometrial carcinoma (EC) for lymphadenectomy has an important effect on the prognosis. Purpose To investigate the role of apparent diffusion coefficient (ADC) measurements in the assessment of stage I EC patients based on three risk categories. Material and Methods We retrospectively studied 80 patients with EC and 28 cervical cancer patients with normal endometrium. 1.5-T conventional magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) (b = 0, 1000 s/mm2 ) were performed, and ADC values were calculated...
January 1, 2018: Acta Radiologica
Leoné Malan, Andrea de Kock, Mark Hamer, Marike Cockeran, Nicolaas Theodor Malan
OBJECTIVES: Taxing psychosocial stress and defensive coping have been associated with hypoactivity in cortisol, a vasoconstrictive agent. Estradiol has vasodilatory properties with cardio- and neuroprotective effects. It can however also induce α1 -adrenergic vasoconstrictive responsiveness. We aimed to determine whether the cortisol-to-estradiol ratio (Cort:E2) may augment α1 -adrenergic responsiveness and hypertension risk when habitually using defensive coping. METHODS: African (n = 168) and Caucasian (n = 207) men and women (46 ± 9 years) were included...
April 18, 2018: Blood Pressure
C Collin Herb, Kaitlyn Grossman, Mark A Feger, Luke Donovan, Jay Hertel
CONTEXT:   Chronic ankle instability (CAI) is a condition characterized by range-of-motion, neuromuscular, and postural-control deficits and subjective disability, reinjury, and posttraumatic osteoarthritis. Differences have been reported in kinematics, kinetics, surface electromyography (EMG), and ground reaction forces during functional tasks performed by those with CAI. These measures are often collected independently, and the research on collecting measures simultaneously during a movement task is limited...
April 18, 2018: Journal of Athletic Training
Hongbo Fu, Huadong Wang, Junwei Jia, Zhibo Ni, Fengzhong Dong
Due to the influence of major elements' self-absorption, scarce observable spectral lines of trace elements, and relative efficiency correction of experimental system, accurate quantitative analysis with calibration-free laser-induced breakdown spectroscopy (CF-LIBS) is in fact not easy. In order to overcome these difficulties, standard reference line (SRL) combined with one-point calibration (OPC) is used to analyze six elements in three stainless-steel and five heat-resistant steel samples. The Stark broadening and Saha - Boltzmann plot of Fe are used to calculate the electron density and the plasma temperature, respectively...
January 1, 2018: Applied Spectroscopy
Jong Hyun Jung, Cheol-Hwan Park, Jisoon Ihm
The exfoliation energy, the energy required to peel off an atomic layer from the surface of a bulk material, is of fundamental importance in the science and engineering of two-dimensional materials. Traditionally, the exfoliation energy of a material has been obtained from first-principles by calculating the difference in the ground-state energy between (i) a slab of N atomic layers ( N ≫ 1) and (ii) a slab of N - 1 atomic layers plus an atomic layer separated from the slab. In this paper, we prove that the exfoliation energy can be obtained exactly as the difference in the ground-state energy between a bulk material (per atomic layer) and a single isolated layer...
April 18, 2018: Nano Letters
Daniel Friedrich, Marc Schlosser, Christian Näther, Arno Pfitzner
The selenogallates CsGaSe3 and Cs2 Ga2 Se5 release gaseous selenium upon heating. An in situ high-temperature X-ray powder diffraction analysis revealed a two-step degradation process from CsGaSe3 to Cs2 Ga2 Se5 and finally to CsGaSe2 . During each step, one Se2 2- unit of the anionic chains in Cs2 [Ga2 (Se2 )2- x Se2+ x ] ( x = 0, 1, 2) decomposes, and one equivalent of selenium is released. This thermal decomposition can be reverted by simple addition of elemental selenium and subsequent annealing of the samples below the decomposition temperature...
April 18, 2018: Inorganic Chemistry
Jing Xie, Harrison A Neal, Jennifer Szymanowski, Peter C Burns, Todd M Alam, May Nyman, Laura Gagliardi
We obtained a kerosene-soluble form of the lithium salt [UO2 (O2 )(OH)2 ]24 phase (Li-U24 ), by adding cetyltrimethylammonium bromide surfactant to aqueous Li-U24 . Interestingly, its variable-temperature solution 7 Li NMR spectroscopy resolves two narrowly spaced resonances down to -10 °C, which shift upfield with increasing temperature, and finally coalesce at temperatures > 85 °C. Comparison with solid-state NMR demonstrates that the Li dynamics in the Li-U24 -CTA phase involves only exchange between different local encapsulated environments...
April 18, 2018: Inorganic Chemistry
Sayani Das, Anindita Sarkar, Ananya Rakshit, Ankona Datta
We report the serendipitous discovery of an optical mercury sensor while trying to develop a water-soluble manganese probe. The sensor is based on a pentaaza macrocycle conjugated to a hemicyanine dye. The pentaaza macrocycle earlier designed in our group was used to develop photoinduced electron transfer (PET)-based "turn-on" fluorescent sensors for manganese. (1) In an attempt to increase the water-solubility of the manganese sensors we changed the dye from BODIPY to hemicyanine. The resultant molecule qHCM afforded a distinct reversible change in the absorption features and a concomitant visible color change upon binding to Hg2+ ions, leading to a highly water-soluble mercury sensor with a 10 ppb detection limit...
April 18, 2018: Inorganic Chemistry
Hyoung-Do Kim, Jong Heon Kim, Kyung Park, Yun Chang Park, Sunkook Kim, Yong Joo Kim, Jozeph Park, Hyun-Suk Kim
In this study, the properties of indium oxynitride (InON) semiconductor films grown by reactive radio frequency sputtering were examined both experimentally and theoretically. Also, thin film transistors (TFTs) incorporating InON as the active layer were evaluated for the first time. It is found that InON films exhibit high stability upon prolonged exposure to air, and the corresponding TFTs are more stable when subjected to negative bias illumination stress (NBIS), compared to devices based on indium oxide (In2O3) or zinc oxynitride (ZnON) semiconductors...
April 18, 2018: ACS Applied Materials & Interfaces
Jonathan P Singer, Joshua M Diamond, Michaela R Anderson, Patricia P Katz, Ken Covinsky, Michelle Oyster, Tatiana Blue, Allison Soong, Laurel Kalman, Pavan Shrestha, Selim M Arcasoy, John R Greenland, Lori Shah, Jasleen Kukreja, Nancy P Blumenthal, Imaani Easthausen, Jeffrey A Golden, Amika McBurnie, Ed Cantu, Joshua Sonett, Steven Hays, Hilary Robbins, Kashif Raza, Matthew Bacchetta, Rupal J Shah, Frank D'Ovidio, Aida Venado, Jason D Christie, David J Lederer
Frailty is associated with increased mortality among lung transplant candidates. We sought to determine the association between frailty, as measured by the Short Physical Performance Battery (SPPB) and mortality after lung transplantation. In a multicenter prospective cohort study of adults who underwent lung transplantation, pre-operative frailty was assessed with the SPPB (n=318) and, in a secondary analysis, the Fried Frailty Phenotype (FFP; n=299). We tested the association between pre-operative frailty and mortality following lung transplantation with propensity score adjusted Cox models...
April 18, 2018: American Journal of Transplantation
Valerie Seymour, Stephen Day, Gudrun Scholz, Kerstin Scheurell, Dinu Iuga, John Griffin, Erhard Kemnitz, John Hanna, Mark E Smith
Multinuclear (1H, 13C, 25Mg) solid-state NMR data is reported for a series of magnesium acetate phases Mg(CH3COO)2.nH2O (n = 0 (two polymorphs), 1, 4). The central focus here is 25Mg as this set of compounds provides an expanded range of local magnesium coordinations compared to what has previously been reported in the literature using NMR. These four compounds provide 10 distinct magnesium sites with varying NMR interaction parameters. One of the anhydrous crystal structures (α) has an MgO7 site which is reported, to the best of our knowledge, for the first time...
April 18, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
Ellison Chen, Keiko Amano, Valentina Pedoia, Richard B Souza, C Benjamin Ma, Xiaojuan Li
Patients who have suffered ACL injury are more likely to develop early onset post-traumatic osteoarthritis despite reconstruction. The purpose of our study was to evaluate the longitudinal changes in the tibiofemoral cartilage contact area size and location after ACL injury and reconstruction. Thirty-one patients with isolated unilateral ACL injury were followed with T2 weighted Fast Spin Echo, T1ρ and T2 MRI at baseline prior to reconstruction, and 6 months, 1 year, and 2 years after surgery. Areas were delineated in FSE images with an in-house Matlab program using a spline-based semi-automated segmentation algorithm...
April 18, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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