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https://www.readbyqxmd.com/read/28929329/somatic-health-effects-of-chernobyl-30-years-on
#1
REVIEW
Maureen Hatch, Elisabeth Cardis
2016 marked the 30th anniversary of the Chernobyl Nuclear Power Plant accident. We and others wrote reviews for the 25th anniversary. Since then, additional papers have appeared and it seems timely to highlight lessons learned. To present, not a systematic review, but a commentary drawing attention to notable findings. We include not only recent reports and updates on previous results, but key findings from prior Chernobyl studies. The dose-dependent increase in Papillary Thyroid Cancer (PTC) following childhood I-131 exposure in Ukraine and Belarus has now been shown to persist for decades...
September 19, 2017: European Journal of Epidemiology
https://www.readbyqxmd.com/read/28923941/intermittent-photocatalytic-activity-of-single-cds-nanoparticles
#2
Yimin Fang, Zhimin Li, Yingyan Jiang, Xian Wang, Hong-Yuan Chen, Nongjian Tao, Wei Wang
Semiconductor photocatalysis holds promising keys to address various energy and environmental challenges. Most studies to date are based on ensemble analysis, which may mask critical photocatalytic kinetics in single nanocatalysts. Here we report a study of imaging photocatalytic hydrogen production of single CdS nanoparticles with a plasmonic microscopy in an in operando manner. Surprisingly, we find that the photocatalytic reaction switches on and off stochastically despite the fact that the illumination is kept constant...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28912659/power-time-curve-comparison-between-weightlifting-derivatives
#3
Timothy J Suchomel, Christopher J Sole
This study examined the power production differences between weightlifting derivatives through a comparison of power-time (P-t) curves. Thirteen resistance-trained males performed hang power clean (HPC), jump shrug (JS), and hang high pull (HHP) repetitions at relative loads of 30%, 45%, 65%, and 80% of their one repetition maximum (1RM) HPC. Relative peak power (PPRel), work (WRel), and P-t curves were compared. The JS produced greater PPRel than the HPC (p < 0.001, d = 2.53) and the HHP (p < 0.001, d = 2...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28902119/determination-of-vertical-jump-as-a-measure-of-neuromuscular-readiness-and-fatigue
#4
Casey M Watkins, Saldiam R Barillas, Megan A Wong, David C Archer, Ian J Dobbs, Robert G Lockie, Jared W Coburn, Tai T Tran, Lee E Brown
Coaches closely monitor training loads and periodize sessions throughout the season to create optimal adaptations at the proper time. However, only monitoring training loads ignores the innate physiological stress each athlete feels individually. Vertical jump (VJ) is widely used as a measure of lower body power, and has been used in post-match studies to demonstrate fatigue levels. However, no pre-training monitoring via VJ performance has been previously studied. Therefore, the purpose of this study was to determine the sensitivity of VJ as a measure of readiness and fatigue on a daily sessional basis...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28895467/kinetic-and-kinematic-patterns-during-high-intensity-clean-movement-searching-for-optimal-load
#5
Achraf Ammar, Bryan L Riemann, Liwa Masmoudi, Marcel Blaumann, Osama Abdelkarim, Anita Hökelmann
The aim of the present study was to investigate loading effects on kinematic and kinetic variables among elite-weightlifters in order to identify an optimal training load to maximize power production for clean-movement. Nine elite-weightlifter (age: 24 ± 4years, body-mass: 77 ± 6.5kg, height: 176 ± 6.1cm and 1RM clean: 170 ± 5kg) performed 2 separate repetitions of the clean using 85, 90, 95% and 100%, in a randomized order, while standing on a force platform and being recorded using 3D-capture-system. Differences in kinematics (barbell displacement, velocity and acceleration) and kinetics (power, vertical ground reaction force (vGRF), rate of force development (RFD), and work) across the loads were statistically assessed...
September 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28880556/initial-stages-in-the-formation-of-nickel-phosphides
#6
Rodrigo García-Muelas, Qiang Li, Nuria Lopez
Metal phosphides have emerged as a new powerful class of materials that can be employed as heterogeneous catalysts in transformations mainly devoted to the formulation of new energy vectors and the valorization of renewables. Synthetic protocols based on wet techniques are available for their formulations that are based on the decomposition of the organic layer decorating the nanoparticles. For nickel, the phosphine of choice is trioctylphosphine and this leads to the formation of NiPx materials but the temperature at which the decomposition starts has been found to depend on the quality of the nickel surface...
September 7, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28873689/liquid-chromatography-high-resolution-mass-spectrometry-for-the-analysis-of-phytochemicals-in-vegetal-derived-food-and-beverages
#7
REVIEW
Giorgia La Barbera, Anna Laura Capriotti, Chiara Cavaliere, Carmela Maria Montone, Susy Piovesana, Roberto Samperi, Riccardo Zenezini Chiozzi, Aldo Laganà
The recent years witnessed a change in the perception of nutrition. Diet does not only provide nutrients to meet the metabolic requirements of the body, but it also constitutes an active way for the consumption of compounds beneficial for human health. Fruit and vegetables are an excellent source of such compounds, thus the growing interest in characterizing phytochemical sources, structures and activities. Given the interest for phytochemicals in food, the development of advanced and suitable analytical techniques for their identification is fundamental for the advancement of food research...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28844381/assessment-of-half-mask-elastomeric-respirator-and-powered-air-purifying-respirator-reprocessing-for-an-influenza-pandemic
#8
Caryn Lawrence, Delbert A Harnish, Megan Sandoval-Powers, Devin Mills, Michael Bergman, Brian K Heimbuch
BACKGROUND: Health care facilities are considering the use of reusable respiratory protective devices (RPDs) to mitigate a potential N95 filtering facepiece respirator shortage caused by an influenza pandemic. US regulators are also considering stockpiling reusable RPDs for pandemic preparedness, but limited data exist on the effectiveness of cleaning and disinfection of these devices. This study defines reprocessing protocols and evaluates their effectiveness against a pandemic influenza strain in a laboratory setting...
August 22, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28834766/co2-saturated-water-as-two-phase-flow-for-fouling-control-in-reverse-electrodialysis
#9
J Moreno, N de Hart, M Saakes, K Nijmeijer
When natural feed waters are used in the operation of a reverse electrodialysis (RED) stack, severe fouling on the ion exchange membranes and spacers occurs. Fouling of the RED stack has a strong influence on the gross power density output; which can decrease up to 50%. Moreover, an increase in the pressure loss occurs between the feed water inlet and outlet, increasing the pumping energy and thus decreasing the net power density that can be obtained. In this work, we extensively investigated the use of CO2 saturated water as two-phase flow cleaning for fouling mitigation in RED using natural feed waters...
August 9, 2017: Water Research
https://www.readbyqxmd.com/read/28827964/antioxidant-and-antiproliferative-activity-of-asparagopsis-taxiformis
#10
P V Neethu, K Suthindhiran, M A Jayasri
BACKGROUND: Asparagopsis taxiformis (Rhodophyta) is a species of red algae belonging to the family Bonnemaisoniaceae. The objective of the present study was to evaluate antioxidant and antiproliferative activity of four fractions (petroleum ether, chloroform, ethyl acetate, and methanol) of A. taxiformis. MATERIALS AND METHODS: The red seaweed, A. taxiformis was collected from Mandapam Coastal Region, Gulf of Mannar, Tamil Nadu. Epiphytes present in algal extracts were cleaned and washed with seawater and fresh water...
July 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28819831/biodiversity-variability-and-metal-accumulation-strategies-in-plants-spontaneously-inhibiting-fly-ash-lagoon-india
#11
Suchita Mukhopadhyay, Vivek Rana, Adarsh Kumar, Subodh Kumar Maiti
Out of 29 plant species taken into consideration for biodiversity investigations, the present study screened out Cyperus rotundus L., Calotropis procera (Aiton) W.T. Aiton, Croton bonplandianus Baill., Eclipta prostrata (L.) L., and Vernonia cinerea (L.) Less. as the most suitable metal-tolerant plant species (high relative density and frequency) which can grow on metal-laden fly ash (FA) lagoon. Total (aqua-regia), residual (HNO3) and plant available (CaCl2) metal concentrations were assessed for the clean-up of metal-contaminated FA disposal site using naturally colonized plants...
August 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28816434/bifacial-perovskite-solar-cells-featuring-semitransparent-electrodes
#12
Chintam Hanmandlu, Chien-Yu Chen, Karunakara Moorthy Boopathi, Hao-Wu Lin, Chao-Sung Lai, Chih-Wei Chu
Inorganic-organic hybrid perovskite solar cells (PSCs) are promising devices for providing future clean energy because of their low cost, ease of fabrication, and high efficiencies, similar to those of silicon solar cells. These materials have been investigated for their potential use in bifacial PSCs, which can absorb light from both sides of the electrodes. Here, we fabricated bifacial PSCs featuring transparent BCP/Ag/MoO3 rear electrodes, which we formed through low-temperature processing using thermal evaporation methods...
September 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28792949/does-environmental-policy-affect-scaling-laws-between-population-and-pollution-evidence-from-american-metropolitan-areas
#13
Nicholas Z Muller, Akshaya Jha
Modern cities are engines of production, innovation, and growth. However, urbanization also increases both local and global pollution from household consumption and firms' production. Do emissions change proportionately to city size or does pollution tend to outpace or lag urbanization? Do emissions scale differently with population versus economic growth or are emissions, population, and economic growth inextricably linked? How are the scaling relationships between emissions, population, and economic growth affected by environmental regulation? This paper examines the link between urbanization, economic growth and pollution using data from Metropolitan Statistical Areas (MSAs) in the United States between 1999 and 2011...
2017: PloS One
https://www.readbyqxmd.com/read/28792857/redistributing-load-using-wearable-resistance-during-power-clean-training-improves-athletic-performance
#14
Caleb R Marriner, John B Cronin, Paul Macadam, Adam Storey
A popular method to improve athletic performance and lower body power is to train with wearable resistance (WR), for example, weighted vests. However, it is currently unknown what training effect this loading method has on full-body explosive movements such as the power clean. The purpose of this study was to determine what effects WR equivalent to 12% body mass (BM) had on the power clean and countermovement jump (CMJ) performance. Sixteen male subjects (age: 23.2 ± 2.7 years; BM: 90.5 ± 10.3 kg) were randomly assigned to five weeks of traditional (TR) power clean training or training with 12% BM redistributed from the bar to the body using WR...
October 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28783898/innovative-spe-lc-ms-ms-technique-for-the-assessment-of-63-pharmaceuticals-and-the-detection-of-antibiotic-resistant-bacteria-a-case-study-natural-water-sources-in-lebanon
#15
Samia Mokh, Mohammad El Khatib, Mohamad Koubar, Zeina Daher, Mohamad Al Iskandarani
A powerful analytical method for simultaneous determination of 63 pharmaceuticals and some metabolites in aqueous samples has been developed. The list of compounds amenable to the methods includes different therapeutic classes belonging to antibiotics, stimulants, antidepressants, mucolytics, and antiparasites. The method involves concentration and clean up by an offline solid phase extraction SPE followed by liquid chromatography coupled to tandem mass spectrometry (LC-ESI-MS/MS). The recovery of the target compounds from water samples was most efficient on Waters Oasis HLB SPE cartridge, while acetonitrile/water (60/40) was shown to be the most suitable solvent for desorbing the compounds from SPE...
December 31, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28777249/isometric-mid-thigh-pull-performance-is-associated-with-athletic-performance-and-sprinting-kinetics-in-division-i-men-and-women-s-basketball-players
#16
Jeremy R Townsend, David Bender, William Vantrease, John Hudy, Kevin Huet, Cassie Williamson, Emily Bechke, Paul Serafini, Gerald T Mangine
PURPOSE: To examine the relationships between isometric mid-thigh pull (IMTP) force, athletic performance measures, and sprint kinetics in Division I men's and women's basketball players. METHODS: Twenty-three (male = 8, female = 15) division 1 basketball players completed a maximal 20-m sprint trial while tethered to a device which provided kinetic feedback (peak and average sprinting power, velocity and force). Additionally, one repetition-maximal (1RM) front squat, 1RM hang clean, vertical jump height, and agility (pro-agility and lane agility) tests were performed...
July 31, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28773182/thermostability-of-hybrid-thermoelectric-materials-consisting-of-poly-ni-ethenetetrathiolate-polyimide-and-carbon-nanotubes
#17
Keisuke Oshima, Shifumi Sadakata, Hitoshi Asano, Yukihide Shiraishi, Naoki Toshima
Three-component organic/inorganic hybrid films were fabricated by drop-casting the mixed dispersion of nanodispersed-poly(nickel 1,1,2,2-ethenetetrathiolate) (nano-PETT), polyimide (PI) and super growth carbon nanotubes (SG-CNTs) in N-methylpyrrolidone (NMP) at the designed ratio on a substrate. The dried nano-PETT/PI/SG-CNT hybrid films were prepared by the stepwise cleaning of NMP and methanol, and were dried once more. The thermoelectric properties of Seebeck coefficient S and electrical conductivity σ were measured by a thin-film thermoelectric measurement system ADVANCE RIKO ZEM-3M8 at 330-380 K...
July 18, 2017: Materials
https://www.readbyqxmd.com/read/28772468/obtaining-cross-sections-of-paint-layers-in-cultural-artifacts-using-femtosecond-pulsed-lasers
#18
Takaaki Harada, Stephanie Spence, Athanasios Margiolakis, Skylar Deckoff-Jones, Rebecca Ploeger, Aaron N Shugar, James F Hamm, Keshav M Dani, Anya R Dani
Recently, ultrafast lasers exhibiting high peak powers and extremely short pulse durations have created a new paradigm in materials processing. The precision and minimal thermal damage provided by ultrafast lasers in the machining of metals and dielectrics also suggests a novel application in obtaining precise cross-sections of fragile, combustible paint layers in artwork and cultural heritage property. Cross-sections of paint and other decorative layers on artwork provide critical information into its history and authenticity...
January 26, 2017: Materials
https://www.readbyqxmd.com/read/28768518/water-sanitation-and-hygiene-infrastructure-and-quality-in-rural-healthcare-facilities-in-rwanda
#19
Alexandra Huttinger, Robert Dreibelbis, Felix Kayigamba, Fidel Ngabo, Leodomir Mfura, Brittney Merryweather, Amelie Cardon, Christine Moe
BACKGROUND: WHO and UNICEF have proposed an action plan to achieve universal water, sanitation and hygiene (WASH) coverage in healthcare facilities (HCFs) by 2030. The WASH targets and indicators for HCFs include: an improved water source on the premises accessible to all users, basic sanitation facilities, a hand washing facility with soap and water at all sanitation facilities and patient care areas. To establish viable targets for WASH in HCFs, investigation beyond 'access' is needed to address the state of WASH infrastructure and service provision...
August 3, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28768081/evaluation-of-the-carefusion-alaris-pc-infusion-pump-for-hyperbaric-oxygen-therapy-conditions-technical-report
#20
Andrew Smale, Theo Tsouras
We present a standardized test methodology and results for our evaluation of the Carefusion Alaris PC infusion pump, comprising the model 8015 PC Unit and the model 8100 Large Volume Pump (LVP) module. The evaluation consisted of basic suitability testing, internal component inspection, surface temperature measurement of selected internal components, and critical performance testing (infusion rate accuracy and occlusion alarm pressure) during conditions of typical hyperbaric oxygen (HBO₂) treatment in our facility's class A multiplace chamber...
January 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
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