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https://www.readbyqxmd.com/read/28645085/extending-the-functionality-of-the-slurry-ferrihydrite-dgt-method-performance-evaluation-for-the-measurement-of-vanadate-arsenate-antimonate-and-molybdate-in-water
#1
Shu Zhang, Paul N Williams, Chun-Yang Zhou, Lena Q Ma, Jun Luo
The monitoring of oxyanions in waters, presents significant challenges due to their relatively low concentrations, and a characteristically changeable/unstable/reactive geochemistry with high spatial and temporal turnover. This results in a very heterogeneous pattern of mobility and bioavailability, which is difficult to capture reliably and in a cost effective manner. The diffusive gradients in thin-films (DGT) technique is a popular analytical tool for testing water quality, primarily because it provides a time-integrated measurement...
June 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28645034/formation-of-hematite-nanoparticle-monolayers-of-controlled-coverage-and-structure-at-polymeric-microparticles
#2
Marta Sadowska, Zbigniew Adamczyk, Małgorzata Nattich-Rak
The deposition of hematite nanoparticles (22nm and 29nm in diameter) on negatively charged polystyrene microspheres (820nm in diameter) was studied by micro-electrophoretic measurements and AFM. The influence of ionic strength, varied between 10(-4) and 10(-2)M, was determined. Initially, the electrophoretic mobility change of microspheres upon the addition of controlled amount of hematite nanoparticles were measured. These dependencies were quantitatively interpreted in terms of the general electrokinetic model...
June 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28643133/children-with-elevated-psychosocial-risk-load-benefit-most-from-a-family-based-preventive-intervention-exploratory-differential-analyses-from-the-german-strengthening-families-program-10-14-adaptation-trial
#3
Sonja Bröning, Christiane Baldus, Monika Thomsen, Peter-Michael Sack, Nicolas Arnaud, Rainer Thomasius
While the effectiveness of substance use prevention programs such as the Strengthening Families Program 10-14 (SFP) has been demonstrated in the USA, European SFP adaptations have not replicated these sizable effects. Following the rationale of the risk moderation hypothesis positing that elevated risk groups may benefit more from a preventive intervention than lower-risk groups, we reanalyzed evaluation data from a randomized controlled trial testing the adapted German version of SFP (SFP-D). We hypothesized a differential impact of risk status on intervention results...
June 22, 2017: Prevention Science: the Official Journal of the Society for Prevention Research
https://www.readbyqxmd.com/read/28643003/recent-developments-in-solution-nuclear-magnetic-resonance-nmr-based-molecular-biology
#4
REVIEW
Joshua J Ziarek, Diego Baptista, Gerhard Wagner
Visualizing post-translational modifications, conformations, and interaction surfaces of protein structures at atomic resolution underpins the development of novel therapeutics to combat disease. As computational resources expand, in silico calculations coupled with experimentally derived structures and functional assays have led to an explosion in structure-based drug design (SBDD) with several compounds in clinical trials. It is increasingly clear that "hidden" transition-state structures along activation trajectories can be harnessed to develop novel classes of allosteric inhibitors...
June 23, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28642929/influence-of-dentin-pretreatment-on-bond-strength-of-universal-adhesives
#5
Claudio Poggio, Riccardo Beltrami, Marco Colombo, Marco Chiesa, Andrea Scribante
Objective: The purpose of the present study was to compare bond strength of different universal adhesives under three different testing conditions: when no pretreatment was applied, after 37% phosphoric acid etching and after glycine application. Materials and methods: One hundred and fifty bovine permanent mandibular incisors were used as a substitute for human teeth. Five different universal adhesives were tested: Futurabond M+, Scotchbond Universal, Clearfil Universal Bond, G-Premio BOND, Peak Universal Bond...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642923/the-influence-of-particle-size-and-curing-conditions-on-testing-mineral-trioxide-aggregate-cement
#6
William Nguyen Ha, Bill Kahler, Laurence James Walsh
Objectives: To assess the effects on curing conditions (dry versus submerged curing) and particle size on the compressive strength (CS) and flexural strength (FS) of set MTA cement. Materials and methods: Two different Portland cements were created, P1 and P2, with P1 < P2 in particle size. These were then used to create two experimental MTA products, M1 and M2, with M1 < M2 in particle size. Particle size analysis was performed according to ISO 13320. The particle size at the 90th percentile (i.e. the larger particles) was P1: 15...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28641357/-the-german-thorax-registry-implementation-of-an-established-tool-of-perioperative-health-care-research
#7
Jérôme Defosse, Mark Schieren, Torsten Loop, Cerstin Arndt, Rainer Röhrig, Erich Stoelben, Corinna Ludwig, Alexander Schleppers, Frank Wappler, Mark Gerbershagen, Alberto Lopez-Pastorini
The collection of clinical treatment data in registry databases is an important aspect of health services research. It allows for a critical evaluation of the safety, efficacy and cost-effectiveness of clinical treatment concepts in large patient populations. The findings of registry research represent real-world patients and treatment structures as they are not limited by strict inclusion criteria or unrealistic conditions as applied in prospective clinical trials. The implementation of the German Thorax Registry has enabled the collection and analysis of data on the interdisciplinary care (thoracic surgery, anaesthesiology, intensive care, pain management) of patients undergoing thoracic surgery...
June 2017: Zentralblatt Für Chirurgie
https://www.readbyqxmd.com/read/28641199/influence-of-weight-bearing-visual-feedback-on-movement-symmetry-during-sit-to-stand-task
#8
Sumayeh Abujaber, Federico Pozzi, Joseph Zeni
BACKGROUND: Weight-bearing asymmetry is common in individuals with hip osteoarthritis and after total hip arthroplasty. Including symmetry training to the rehabilitation programs may normalize movement strategies during dynamic tasks. The purpose of this study was to evaluate the immediate influences of real-time visual feedback of weight distribution on the interlimb movement symmetry during the sit-to-stand task, before and after total hip arthroplasty, and to determine whether physical impairments affect the response to visual feedback...
June 8, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28641182/unraveling-the-complexities-of-the-velocity-dependency-of-e-coli-retention-and-release-parameters-in-saturated-porous-media
#9
Salini Sasidharan, Scott A Bradford, Saeed Torkzaban, Xueyan Ye, Joanne Vanderzalm, Xinqiang Du, Declan Page
Escherichia coli transport and release experiments were conducted to investigate the pore-water velocity (v) dependency of the sticking efficiency (α), the fraction of the solid surface area that contributed to retention (Sf), the percentage of injected cells that were irreversibly retained (Mirr), and cell release under different (10-300mM) ionic strength (IS) conditions. Values of α, Sf, and Mirr increased with increasing IS and decreasing v, but the dependency on v was greatest at intermediate IS (30 and 50mM)...
June 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28640772/the-effect-of-a-carbohydrate-mouth-rinse-on-upper-body-muscular-strength-and-endurance
#10
James E Dunkin, Shaun M Phillips
Dunkin, JE and Phillips, SM. The effect of a carbohydrate mouth rinse on upper-body muscular strength and endurance. J Strength Cond Res 31(7): 1948-1953, 2017-Carbohydrate (CHO) mouth rinsing rapidly increases corticomotor output and maximal muscle force production, which could enhance muscular strength and endurance during resistance exercise. However, previous research has found no effect of CHO rinsing on muscular strength or endurance. The current study altered the CHO rinse composition and frequency and the muscular endurance test to further investigate the effects of a CHO mouth rinse on upper-body muscular strength and endurance...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28640771/comparison-of-jamar-and-bodygrip-dynamometers-for-handgrip-strength-measurement
#11
Rita S Guerra, Teresa F Amaral, Ana S Sousa, Isabel Fonseca, Fernando Pichel, Maria T Restivo
Guerra, RS, Amaral, TF, Sousa, AS, Fonseca, I, Pichel, F, and Restivo, MT. Comparison of Jamar and Bodygrip dynamometers for handgrip strength measurement. J Strength Cond Res 31(7): 1931-1940, 2017-Studies that compared the agreement between Jamar and other models of dynamometers for handgrip strength (HGS) measurement have exhibited variability in the provided results. The lack of comparability between dynamometers led to the development of the Bodygrip dynamometer. This study aims to examine the reliability of the Bodygrip for HGS measurement, to compare it with the Jamar, and to explore the HGS differences between instruments considering the ergonomic effect of using the Bodygrip with 2 different handles...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28640770/physiological-responses-and-time-motion-analysis-of-small-combat-games-in-kickboxing-impact-of-ring-size-and-number-of-within-round-sparring-partners
#12
Ibrahim Ouergui, Nizar Houcine, Hamza Marzouki, Philip Davis, Emerson Franchini, Nabil Gmada, Ezzedine Bouhlel
Ouergui, I, Houcine, N, Marzouki, H, Davis, P, Franchini, E, Gmada, N, and Bouhlel, E. Physiological responses and time-motion analysis of small combat games in kickboxing: impact of ring size and number of within-round sparring partners. J Strength Cond Res 31(7): 1840-1846, 2017-The study aimed to investigate the physiological responses and time-structure of small combat games (SCGs) in kickboxing according to ring sizes and number of sparring partners. Twenty athletes from regional (n = 13) and national levels (n = 7) participated in the study (mean ± SD, age: 20...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28640315/formation-and-field-driven-dynamics-of-nematic-spheroids
#13
Fred Fu, Nasser Mohieddin Abukhdeir
Unlike the canonical application of liquid crystals (LCs), LC displays, emerging technologies based on LC materials are increasingly leveraging the presence of nanoscale defects. The inherent nanoscale characteristics of LC defects present both significant opportunities as well as barriers for the application of this fascinating class of materials. Simulation-based approaches to the study of the effects of confinement and interface anchoring conditions on LC domains has resulted in significant progress over the past decade, where simulations are now able to access experimentally-relevant length scales while simultaneously capturing nanoscale defect structures...
June 22, 2017: Soft Matter
https://www.readbyqxmd.com/read/28640152/preseason-workload-volume-and-high-risk-periods-for-noncontact-injury-across-multiple-australian-football-league-seasons
#14
Marcus J Colby, Brian Dawson, Jarryd Heasman, Brent Rogalski, Michael Rosenberg, Leanne Lester, Peter Peeling
Colby, MJ, Dawson, B, Heasman, J, Rogalski, B, Rosenberg, M, Lester, L, and Peeling, P. Preseason workload volume and high-risk periods for noncontact injury across multiple Australian Football League seasons. J Strength Cond Res 31(7): 1821-1829, 2017-The purpose of this study was to assess the association between preseason workloads and noncontact injury risk in Australian football players. Individual player injury data were recorded over 4 full seasons (2012-15) from one professional club. Noncontact injury incidence (per 1,000 "on legs" field training and game hours) was compared across the preseason, precompetition, and in-season phases to determine relative noncontact injury risk...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28639534/synthesis-of-bioadditives-of-fuels-from-biodiesel-derived-glycerol-by-esterification-with-acetic-acid-on-solid-catalysts
#15
Gabriel A Bedogni, Mauro D Acevedo, Federico Aguzín, Nora B Okulik, Cristina L Padró
In this paper, glycerol esterification with acetic acid was studied on several solid acid catalysts: Al2O3, Al-MCM-41, HPA/SiO2, HBEA, Amberlyst-15 and Amberlyst-36 with the aim of determining the reaction conditions and the nature of the surface acid sites required to produce selectively triacetylglycerol (triacetin). The acidity of the catalysts (nature, density and strength of acid sites) was characterized by temperature programmed desorption of NH3 and FTIR of adsorbed pyridine. Al2O3 (Lewis acidity) did not show any activity in the reaction...
June 22, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28639206/are-associations-between-sexist-video-games-and-decreased-empathy-toward-women-robust-a-reanalysis-of-gabbiadini-et-al-2016
#16
Christopher J Ferguson, M Brent Donnellan
Gabbiadini, A., Riva, P., Andrighetto, L., Volpato, C., & Bushman, B, (PloS ONE, 2016) provided evidence for a connection between "sexist" video games and decreased empathy toward girls using an experimental paradigm. These claims are based on a moderated mediation model. They reported a three-way interaction between game condition, gender, and avatar identification when predicting masculine ideology in their original study. Masculine ideology was associated, in turn, with decreased empathy. However, there were no main experimental effects for video game condition on empathy...
June 21, 2017: Journal of Youth and Adolescence
https://www.readbyqxmd.com/read/28637509/genetic-effects-of-rs3740199-polymorphism-in-adam12-gene-on-knee-osteoarthritis-a-meta-analysis
#17
Zheng Hao, Xin Li, Jin Dai, Baocheng Zhao, Qing Jiang
BACKGROUND: Knee osteoarthritis (OA) is a complex arthritic condition in which genetic factors play an important role. ADAM12 gene is one of the recognized candidate genes although the results are conflicting. To derive a more precise estimation of the association between rs3740199 polymorphism in ADAM12 gene and risk of knee OA, we performed a meta-analysis based on six related studies, including a total of 2185 cases and 3716 controls. METHODS: A comprehensive search was performed to identify related studies up to April 14, 2017...
June 20, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28635681/antimicrobial-activity-of-nitric-oxide-releasing-ti-6al-4v-metal-oxide
#18
Nina A Reger, Wilson S Meng, Ellen S Gawalt
Titanium and titanium alloy materials are commonly used in joint replacements, due to the high strength of the materials. Pathogenic microorganisms can easily adhere to the surface of the metal implant, leading to an increased potential for implant failure. The surface of a titanium-aluminum-vanadium (Ti-6Al-4V) metal oxide implant material was functionalized to deliver an small antibacterial molecule, nitric oxide. S-nitroso-penicillamine, a S-nitrosothiol nitric oxide donor, was covalently immobilized on the metal oxide surface using self-assembled monolayers...
June 21, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28635503/practical-guidelines-to-minimise-language-and-cognitive-confounds-in-the-diagnosis-of-capd-a-brief-tutorial
#19
Gail D Chermak, Doris-Eva Bamiou, Vasiliki Vivian Iliadou, Frank E Musiek
OBJECTIVE: To provide audiologists with strategies to minimise confounding cognitive and language processing variables and accurately diagnose central auditory processing disorder (CAPD). DESIGN: Tutorial. STUDY SAMPLE: None. RESULTS: Strategies are reviewed to minimise confounding cognitive and language processing variables and accurately diagnose CAPD. CONCLUSIONS: Differential diagnosis is exceedingly important and can be quite challenging...
February 28, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28635367/in-vivo-and-in-vitro-depolymerizations-of-intracellular-medium-chain-length-poly-3-hydroxyalkanoates-produced-by-pseudomonas-putida-bet001
#20
Siti Nor Syairah Anis, Mohamad Suffian Mohamad Annuar, Khanom Simarani
In vivo and in vitro depolymerizations of intracellular medium-chain-length poly-3-hydroxyalkanoates (mcl-PHA) in Pseudomonas putida Bet001 grown on lauric acid was studied. Both processes were studied under optimum conditions for mcl-PHA depolymerization viz. 0.2 M Tris-HCl buffer, pH 9, ionic strength (I) = 0.2 M at 30 °C. For in vitro depolymerization studies, cell-free system was obtained from lysing bacterial cells suspension by ultrasonication at optimum conditions (frequency 37 kHz, 30% of power output, <25 (°)C for 120 minutes)...
June 21, 2017: Preparative Biochemistry & Biotechnology
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