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https://www.readbyqxmd.com/read/28792949/does-environmental-policy-affect-scaling-laws-between-population-and-pollution-evidence-from-american-metropolitan-areas
#1
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
#2
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...
August 9, 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
#3
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...
July 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
#4
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
#5
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
#6
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
#7
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
#8
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
https://www.readbyqxmd.com/read/28761817/purely-ultrasonic-enzyme-extraction-from-activated-sludge-in-an-ultrasonic-cleaning-bath
#9
Mario Plattes, Christian Koehler, Tom Gallé
Enzymes are important in biological wastewater treatment systems, since they are responsible for breakdown of macro- and micropollutants, thereby making the pollutants available for metabolism. Enzyme activity has been investigated in particular in activated sludge processes, since the activated sludge technology is the most important and widely spread wastewater treatment technology used today. Various methods have been used to extract enzymes from activated sludge in order to measure their activity, these include stirring with additives like detergents and cation exchange resins, ultrasonication (with probes) and combinations of the three [1], [2], [3]...
2017: MethodsX
https://www.readbyqxmd.com/read/28753624/muscular-fatigue-in-response-to-different-modalities-of-crossfit-sessions
#10
José Luis Maté-Muñoz, Juan H Lougedo, Manuel Barba, Pablo García-Fernández, Manuel V Garnacho-Castaño, Raúl Domínguez
BACKGROUND: CrossFit is a new strength and conditioning regimen involving short intense daily workouts called workouts of the day (WOD). This study assesses muscular fatigue levels induced by the three modalities of CrossFit WOD; gymnastics (G), metabolic conditioning (M) and weightlifting (W). MATERIAL AND METHODS: 34 healthy subjects undertook three WOD (one per week): a G WOD consisting of completing the highest number of sets of 5 pull-ups, 10 push-ups and 15 air squats in 20 min; an M WOD, in which the maximum number of double skipping rope jumps was executed in 8 sets (20 s), resting (10 s) between sets; and finally, a W WOD in which the maximum number of power cleans was executed in 5 min, lifting a load equivalent to 40% of the individual's 1RM...
2017: PloS One
https://www.readbyqxmd.com/read/28738648/matrix-interference-evaluation-employing-gc-and-lc-coupled-to-triple-quadrupole-tandem-mass-spectrometry
#11
S Uclés, A Lozano, A Sosa, P Parrilla Vázquez, A Valverde, A R Fernández-Alba
Gas and liquid chromatography coupled to triple quadrupole tandem mass spectrometry are currently the most powerful tools employed for the routine analysis of pesticide residues in food control laboratories. However, whatever the multiresidue extraction method, there will be a residual matrix effect making it difficult to identify/quantify some specific compounds in certain cases. Two main effects stand out: (i) co-elution with isobaric matrix interferents, which can be a major drawback for unequivocal identification, and therefore false negative detections, and (ii) signal suppression/enhancement, commonly called the "matrix effect", which may cause serious problems including inaccurate quantitation, low analyte detectability and increased method uncertainty...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28732972/state-of-the-art-and-recent-advances-in-the-ultrasound-assisted-synthesis-exfoliation-and-functionalization-of-graphene-derivatives
#12
REVIEW
Kasturi Muthoosamy, Sivakumar Manickam
Sonochemistry, an almost a century old technique was predominantly employed in the cleaning and extraction processes but this tool has now slowly gained tremendous attention in the synthesis of nanoparticles (NPs) where particles of sub-micron have been produced with great stability. Following this, ultrasonication techniques have been largely employed in graphene synthesis and its dispersion in various solvents which would conventionally take days and offers poor yield. Ultrasonic irradiation allows the production of thin-layered graphene oxide (GO) and reduced graphene oxide (RGO) of up to 1nm thickness and can be produced in single layers...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28720114/effects-of-the-equip-quasi-experimental-study-testing-a-collaborative-quality-improvement-approach-for-maternal-and-newborn-health-care-in-tanzania-and-uganda
#13
P Waiswa, F Manzi, G Mbaruku, A K Rowe, M Marx, G Tomson, T Marchant, B A Willey, J Schellenberg, S Peterson, C Hanson
BACKGROUND: Quality improvement is a recommended strategy to improve implementation levels for evidence-based essential interventions, but experience of and evidence for its effects in low-resource settings are limited. We hypothesised that a systemic and collaborative quality improvement approach covering district, facility and community levels, supported by report cards generated through continuous household and health facility surveys, could improve the implementation levels and have a measurable population-level impact on coverage and quality of essential services...
July 18, 2017: Implementation Science: IS
https://www.readbyqxmd.com/read/28719082/determination-of-seven-drugs-of-abuse-and-their-metabolites-in-surface-and-waste-water-using-solid-phase-extraction-coupled-to-liquid-chromatography-with-high-resolution-mass-spectrometry
#14
Helena Prosen, Núria Fontanals, Francesc Borrull, Rosa Maria Marcé
A method based on liquid chromatography with electrospray ionization high-resolution mass spectrometry (Exactive Orbitrap) combined with solid-phase extraction using a strong cationic exchange mixed-mode sorbent has been developed for the determination of seven drugs of abuse, including two synthetic cathinones, as well as some of their metabolites in environmental water samples. The method provides low detection limits and a high confirmation power thanks to the diagnostic and two fragment ions monitored for each compound in high-resolution mass spectrometry, providing six identification points for each analyte...
July 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28706190/clean-power-generation-from-the-intractable-natural-coalfield-fires-turn-harm-into-benefit
#15
Bobo Shi, Hetao Su, Jinshi Li, Haining Qi, Fubao Zhou, José L Torero, Zhongwei Chen
The coal fires, a global catastrophe for hundreds of years, have been proved extremely difficult to control, and hit almost every coal-bearing area globally. Meanwhile, underground coal fires contain tremendous reservoir of geothermal energy. Approximately one billion tons of coal burns underground annually in the world, which could generate ~1000 GW per annum. A game-changing approach, environmentally sound thermal energy extraction from the intractable natural coalfield fires, is being developed by utilizing the waste energy and reducing the temperature of coalfield fires at the same time...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28702919/experimental-investigation-of-performance-and-emissions-of-a-vcr-diesel-engine-fuelled-with-n-butanol-diesel-blends-under-varying-engine-parameters
#16
Ashish Nayyar, Dilip Sharma, Shyam Lal Soni, Alok Mathur
The continuous rise in the cost of fossil fuels as well as in environmental pollution has attracted research in the area of clean alternative fuels for improving the performance and emissions of internal combustion (IC) engines. In the present work, n-butanol is treated as a bio-fuel and investigations have been made to evaluate the feasibility of replacing diesel with a suitable n-butanol-diesel blend. In the current research, an experimental investigation was carried out on a variable compression ratio CI engine with n-butanol-diesel blends (10-25% by volume) to determine the optimum blending ratio and optimum operating parameters of the engine for reduced emissions...
July 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28683665/nordic-registry-based-cohort-studies-possibilities-and-pitfalls-when-combining-nordic-registry-data
#17
REVIEW
John Maret-Ouda, Wenjing Tao, Karl Wahlin, Jesper Lagergren
AIMS: All five Nordic countries (Denmark, Finland, Iceland, Norway and Sweden) have nationwide registries with similar data structure and validity, as well as personal identity numbers enabling linkage between registries. These resources provide opportunities for medical research that is based on large registry-based cohort studies with long and complete follow-up. This review describes practical aspects, opportunities and challenges encountered when setting up all-Nordic registry-based cohort studies...
July 2017: Scandinavian Journal of Public Health
https://www.readbyqxmd.com/read/28669067/determining-the-optimal-dose-of-1940-nm-thulium-fiber-laser-for-assisting-the-endodontic-treatment
#18
Ayse Sena Kabas Sarp, Murat Gulsoy
Insufficient cleaning, the complex anatomy of the root canal system, inaccessible accessory canals, and inadequate penetration of irrigants through dentinal tubules minimizes the success of the conventional endodontic treatment. Laser-assisted endodontic treatment enhances the quality of conventional treatment, but each laser wavelength has its own its own limitations. The optimal parameters for the antibacterial efficiency of a new wavelength, 1940-nm Thulium Fiber Laser, were firstly investigated in this study...
July 1, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28654211/cleaning-lateral-morphological-features-of-the-root-canal-the-role-of-streaming-and-cavitation
#19
J P Robinson, R G Macedo, B Verhaagen, M Versluis, P R Cooper, L W M van der Sluis, A D Walmsley
AIM: To investigate the effects of ultrasonic activation file type, lateral canal location and irrigant on the removal of a biofilm-mimicking hydrogel from a fabricated lateral canal. Additionally, the amount of cavitation and streaming was quantified for these parameters. METHODOLOGY: An intracanal sonochemical dosimetry method was used to quantify the cavitation generated by an IrriSafe 25 mm length, size 25 file inside a root canal model filled with filtered degassed/saturated water or three different concentrations of NaOCl...
June 27, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28647262/development-of-a-hybrid-photo-bioreactor-and-nanoparticle-adsorbent-system-for-the-removal-of-co2-and-selected-organic-and-metal-co-pollutants
#20
Andrea A Rocha, Christian Wilde, Zhenzhong Hu, Oleg Nepotchatykh, Yevgen Nazarenko, Parisa A Ariya
Fossil fuel combustion and many industrial processes generate gaseous emissions that contain a number of toxic organic pollutants and carbon dioxide (CO2) which contribute to climate change and atmospheric pollution. There is a need for green and sustainable solutions to remove air pollutants, as opposed to conventional techniques which can be expensive, consume additional energy and generate further waste. We developed a novel integrated bioreactor combined with recyclable iron oxide nano/micro-particle adsorption interfaces, to remove CO2, and undesired organic air pollutants using natural particles, while generating oxygen...
July 2017: Journal of Environmental Sciences (China)
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