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https://www.readbyqxmd.com/read/28938248/a-youth-compendium-of-physical-activities-activity-codes-and-metabolic-intensities
#1
Nancy F Butte, Kathleen B Watson, Kate Ridley, Issa F Zakeri, Robert G McMurray, Karin A Pfeiffer, Scott E Crouter, Stephen D Herrmann, David R Bassett, Alexander Long, Zekarias Berhane, Stewart G Trost, Barbara E Ainsworth, David Berrigan, Janet E Fulton
PURPOSE: A Youth Compendium of Physical Activities (Youth Compendium) was developed to estimate the energy costs of physical activities using data on youth only. METHODS: Based on a literature search and pooled data of energy expenditure measurements in youth, the energy costs of 196 activities were compiled in 16 activity categories to form a Youth Compendium of Physical Activities. To estimate the intensity of each activity, measured oxygen consumption (V[Combining Dot Above]O2) was divided by basal metabolic rate (Schofield age-, sex- and mass-specific equations) to produce a youth MET (METy)...
September 21, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28938208/effects-of-process-operating-conditions-on-the-autotrophic-denitrification-of-nitrate-contaminated-groundwater-using-bioelectrochemical-systems
#2
D Cecconet, M Devecseri, A Callegari, A G Capodaglio
Nitrates have been detected in groundwater worldwide, and their presence can lead to serious groundwater use limitations, especially because of potential health problems. Amongst different options for their removal, bioelectrochemical systems (BESs) have achieved promising results; in particular, attention has raised on BES-driven autotrophic denitrification processes. In this work, the performance of a microbial electrolysis cell (MEC) for groundwater autotrophic denitrification, is assessed in different conditions of nitrate load, hydraulic retention time (HRT) and process configuration...
September 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28938201/achieving-enhanced-denitrification-via-hydrocyclone-treatment-on-mixed-liquor-recirculation-in-the-anoxic-aerobic-process
#3
Yi Liu, Hualin Wang, Yinxiang Xu, Qingsong Tu, Xiurong Chen
This work presents the novel application of hydrocyclones for mixed liquor recirculation (MLR) treatment in the anoxic/aerobic (A/O) process to enhance the denitrification process. An exhaustive investigation on treated activated sludge and A/O effluents was conducted in batch and continuous operation tests. The median diameter of the sludge flocs was decreased from 78.82 μm to 15.77-23.31 μm, and the extracellular polymeric substances (EPS) desorption was observed, thus leading to the release of the soluble chemical oxygen demand (SCOD)...
September 12, 2017: Chemosphere
https://www.readbyqxmd.com/read/28938066/systematic-optimization-of-battery-materials-key-parameter-optimization-for-the-scalable-synthesis-of-uniform-high-energy-and-high-stability-lini0-6mn0-2co0-2o2-cathode-material-for-lithium-ion-batteries
#4
Dong Ren, Yun Shen, Yao Yang, Luxi Shen, Barnaby D A Levin, Yingchao Yu, David A Muller, Héctor D Abruña
Ni-rich LiNixMnyCo1-x-yO2 (x>0.5) (NMC) materials have attracted a great deal of interest as promising cathode candidates for Li-ion batteries (LIBs) due to their low cost and high energy density. However, several issues, including sensitivity to moisture, difficulty in reproducibly preparing well-controlled morphology particles and, poor cyclability, have hindered their large scale deployment; especially for electric vehicle (EV) applications. In this work, we have developed a uniform, highly stable, high-energy density, Ni-rich LiNi0...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937764/is-vitamin-a-an-antioxidant-or-a-prooxidant
#5
Duy Quang Dao, Thi Chinh Ngo, Nguyen Minh Thong, Pham Cam Nam
Antioxidant efficiency of all-trans-retinol has been studied on the basis of characteristic thermochemical properties using density functional theory. The influence of the solvent polarity has also been evaluated. It is found that retinol may act in parallel as an effective antioxidant via H-atom donating as well as a prooxidant in yielding reactive hydroxyl radical. In fact, the lowest values of bond dissociation enthalpy were found at C18-H and C18-OH positions. Retinol was also determined as good electron donor but bad acceptor in the single electron transfer (ET) reaction with hydroperoxyl (HOO●) radical...
September 22, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28937740/ab-initio-study-of-the-atomic-level-structure-of-the-rutile-tio2-110-titanium-nitride-tin-interface
#6
Jose Julio Gutierrez Moreno, Michael Nolan
Titanium nitride (TiN) is widely used in industry as a protective coating due to its hardness and resistance to corrosion and can spontaneously form a thin oxide layer when it is exposed to air, which could modify the properties of the coating. With limited understanding of the TiO2 - TiN interfacial system at present, this work aims to describe the structural and electronic properties of oxidized TiN based on a density functional theory (DFT) study of the rutile TiO2 (110) - TiN (100) interface model system, also including Hubbard +U correction on Ti 3d states...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937660/a-low-power-consumption-algorithm-for-efficient-energy-consumption-in-zigbee-motes
#7
Daniel Vaquerizo-Hdez, Pablo Muñoz, María D R-Moreno, David F Barrero
Wireless Sensor Networks (WSNs) are becoming increasingly popular since they can gather information from different locations without wires. This advantage is exploited in applications such as robotic systems, telecare, domotic or smart cities, among others. To gain independence from the electricity grid, WSNs devices are equipped with batteries, therefore their operational time is determined by the time that the batteries can power on the device. As a consequence, engineers must consider low energy consumption as a critical objective to design WSNs...
September 22, 2017: Sensors
https://www.readbyqxmd.com/read/28937167/an-unsaturated-metal-site-promoted-approach-to-construct-strongly-coupled-noble-metal-hnb3o8-nanosheets-for-efficient-thermo-photo-catalytic-reduction
#8
Lijuan Shen, Yuzhou Xia, Sen Lin, Shijing Liang, Ling Wu
Creating two-dimensional (2D) crystal-metal heterostructures with an ultrathin thickness has spurred increasing research endeavors in catalysis because of its fascinating opportunities in tuning the electronic state at the surface and enhancing the chemical reactivity. Here we report a novel and facile Nb(4+)-assisted strategy for the in situ growth of highly dispersed Pd nanoparticles (NPs) on monolayer HNb3O8 nanosheets (HNb3O8 NS) constituting a 2D Pd/HNb3O8 NS heterostructure composite without using extra reducing agents and stabilizing agents...
September 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28936391/evaluation-of-a-multi-year-policy-focused-intervention-to-increase-physical-activity-and-related-behaviors-in-lower-resourced-early-care-and-education-settings-active-early-2-0
#9
Emily J Tomayko, Ronald J Prince, Jill Hoiting, Abbe Braun, Tara L LaRowe, Alexandra K Adams
Physical activity is a critical component of obesity prevention, but few interventions targeting early childhood have been described. The Active Early guide was designed to increase physical activity in early care and education (ECE) settings. The purpose of Active Early 2.0 was to evaluate the effectiveness of Active Early along with provider training, microgrant support, and technical assistance over 2 years (2012-2014) to increase physical activity and related behaviors (e.g., nutrition) in settings serving a high proportion of children from underserved groups in recognition of significant disparities in obesity and challenges meeting physical activity recommendations in low-resource settings...
December 2017: Preventive Medicine Reports
https://www.readbyqxmd.com/read/28936160/the-energy-metabolism-dysfunction-in-psychiatric-disorders-postmortem-brains-focus-on-proteomic-evidence
#10
REVIEW
Giuliana S Zuccoli, Verônica M Saia-Cereda, Juliana M Nascimento, Daniel Martins-de-Souza
Psychiatric disorders represent a great medical and social challenge and people suffering from these conditions face many impairments regarding personal and professional life. In addition, a mental disorder will manifest itself in approximately one quarter of the world's population at some period of their life. Dysfunction in energy metabolism is one of the most consistent scientific findings associated with these disorders. With this is mind, this review compiled data on disturbances in energy metabolism found by proteomic analyses of postmortem brains collected from patients affected by the most prevalent psychiatric disorders: schizophrenia (SCZ), bipolar disorder (BPD), and major depressive disorder (MDD)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28936029/silicon-nanoporous-membranes-as-a-rigorous-platform-for-validation-of-biomolecular-transport-models
#11
Benjamin J Feinberg, Jeff C Hsiao, Jaehyun Park, Andrew L Zydney, William H Fissell, Shuvo Roy
Microelectromechanical systems (MEMS), a technology that resulted from significant innovation in semiconductor fabrication, have recently been applied to the development of silicon nanopore membranes (SNM). In contrast to membranes fabricated from polymeric materials, SNM exhibit slit-shaped pores, monodisperse pore size, constant surface porosity, zero pore overlap, and sub-micron thickness. This development in membrane fabrication is applied herein for the validation of the XDLVO (extended Derjaguin, Landau, Verwey, and Overbeek) theory of membrane transport within the context of hemofiltration...
August 15, 2017: Journal of Membrane Science
https://www.readbyqxmd.com/read/28934653/mixed-sulfate-reducing-bacteria-enriched-microbial-fuel-cells-for-the-treatment-of-wastewater-containing-copper
#12
Waheed Miran, Jiseon Jang, Mohsin Nawaz, Asif Shahzad, Sang Eun Jeong, Che Ok Jeon, Dae Sung Lee
Microbial fuel cells (MFCs) have been widely investigated for organic-based waste/substrate conversion to electricity. However, toxic compounds such as heavy metals are ubiquitous in organic waste and wastewater. In this work, a sulfate reducing bacteria (SRB)-enriched anode is used to study the impact of Cu(2+) on MFC performance. This study demonstrates that MFC performance is slightly enhanced at concentrations of up to 20 mg/L of Cu(2+), owing to the stimulating effect of metals on biological reactions...
September 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28934546/oxygen-vacancy-promoted-heterogeneous-fenton-like-degradation-of-ofloxacin-at-ph-3-2-9-0-by-cu-substituted-magnetic-fe3o4-feooh-nanocomposite
#13
Hang Jin, Xike Tian, Yulun Nie, Zhaoxin Zhou, Chao Yang, Yong Li, Liqiang Lu
To develop an ultra-efficient and reusable heterogeneous Fenton-like catalyst at a wide working pH range is a great challenge for its application in practical water treatment. We report an oxygen vacancy promoted heterogeneous Fenton-like reaction mechanism and an unprecedented ofloxacin (OFX) degradation efficiency of Cu doped Fe3O4@FeOOH magnetic nanocomposite. Without the aid of external energy, OFX was always completely removed within 30 min at pH 3.2-9.0. Compared with Fe3O4@FeOOH, the pseudo-first-order reaction constant was enhanced by 10 times due to Cu substitution (9...
September 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28934271/dc-based-smart-pv-powered-home-energy-management-system-based-on-voltage-matching-and-rf-module
#14
Ahmad H Sabry, W Z W Hasan, Mza Ab Kadir, M A M Radzi, S Shafie
The main tool for measuring system efficiency in homes and offices is the energy monitoring of the household appliances' consumption. With the help of GUI through a PC or smart phone, there are various applications that can be developed for energy saving. This work describes the design and prototype implementation of a wireless PV-powered home energy management system under a DC-distribution environment, which allows remote monitoring of appliances' energy consumptions and power rate quality. The system can be managed by a central computer, which obtains the energy data based on XBee RF modules that access the sensor measurements of system components...
2017: PloS One
https://www.readbyqxmd.com/read/28933853/exchange-hole-dipole-dispersion-model-for-accurate-energy-ranking-in-molecular-crystal-structure-prediction-ii-non-planar-molecules
#15
Sarah R Whittleton, Alberto Otero-de-la-Roza, Erin R Johnson
The crystal structure prediction (CSP) of a given compound from its molecular diagram is a fundamental challenge in computational chemistry with implications in relevant technological fields. A key component of CSP is the method to calculate the lattice energy of a crystal, which allows the ranking of candidate structures. This work is the second part of our investigation to assess the potential of the exchange-hole dipole moment dispersion (XDM) model for crystal structure prediction. In this article, we study the relatively large, non-planar, mostly flexible molecules in the first five blind tests held by the Cambridge Crystallographic Data Centre...
September 21, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28933850/an-efficient-strategy-for-the-calculation-of-solvation-free-energies-in-water-and-chloroform-at-the-quantum-mechanical-molecular-mechanical-level
#16
Meiting Wang, Pengfei Li, Xiangyu Jia, Wei Liu, Yihan Shao, Wenxin Hu, Jun Zheng, Bernard R Brooks, Ye Mei
The partitioning of solute molecules between immiscible solvents with significantly different polarities is of great importance. The polarization between the solute and solvent molecules plays an essential role in determining the solubility of the solute, which makes computational studies utilizing molecular mechanics (MM) rather difficult. In contrast, quantum mechanics (QM) can provide more reliable predictions. In this work, the partition coefficients of the side chain analogs of some amino acids between water and chloroform were computed...
September 21, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28933837/a-quartz-crystal-microbalance-model-for-quantitatively-probing-the-deformation-of-adsorbed-particles-at-low-surface-coverage
#17
Jurriaan J J Gillissen, Joshua Alexander Jackman, Seyed R Tabaei, Bo Kyeong Yoon, Nam-Joon Cho
Characterizing the deformation of nanoscale, soft-matter particulates at solid-liquid interfaces is a demanding task, and there are limited experimental options to perform quantitative measurements in a non-perturbative manner. Previous attempts, based on the quartz crystal microbalance (QCM) technique, focused on the high surface coverage regime and modeled the adsorbed particles as a homogeneous film, while not considering the coupling between particles and surrounding fluid and hence resulting in an underestimation of the known particle height...
September 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28933835/light-induced-spin-state-switching-and-relaxation-in-spin-pairs-of-copper-ii-nitroxide-based-molecular-magnets
#18
Sergey V Tumanov, Sergey L Veber, Svyatoslav E Tolstikov, Natalia A Artiukhova, Galina V Romanenko, Victor I Ovcharenko, Matvey V Fedin
Similar to spin-crossover (SCO) compounds, spin states of copper(II)-nitroxide based molecular magnets can be switched by various external stimuli including temperature and light. Although photoswitching and reverse relaxation of nitroxide-copper(II)-nitroxide triads were investigated in some detail, similar study for copper(II)-nitroxide spin pairs was still missing. In this work we address photoswitching and relaxation phenomena in exchange-coupled spin pairs of this family of molecular magnets. Using electron paramagnetic resonance (EPR) spectroscopy with photoexcitation, we demonstrate that compared to triad-containing compounds the photoinduced weakly coupled spin (WS) states of copper(II)-nitroxide pairs are remarkably more stable at cryogenic temperatures and relax to the ground strongly coupled spin (SS) states on the scale of days...
September 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28933825/the-surface-chemistry-of-perovskite-type-electrodes-during-high-temperature-co2-electrolysis-investigated-by-operando-photoelectron-spectroscopy
#19
Alexander Karl Opitz, Andreas Nenning, Christoph Rameshan, Markus Kubicek, Thomas Götsch, Raoul Blume, Michael Hävecker, Axel Knop-Gericke, Gunther Rupprechter, Bernhard Klötzer, Juergen Fleig
Any substantial move of energy sources from fossil fuels to renewable resources requires large scale storage of excess energy, for example via power to fuel processes. In this respect electrochemical reduction of CO2 may become very important, since it offers a method of sustainable CO production, which is a crucial prerequisite for synthesis of sustainable fuels. Carbon dioxide reduction in solid oxide electrolysis cells (SOECs) is particularly promising owing to the high operating temperature, which leads to both improved thermodynamics and fast kinetics...
September 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28933553/bromide-photo-oxidation-sensitized-to-visible-light-in-consecutive-ion-pairs
#20
Guocan Li, Wesley B Swords, Gerald J Meyer
The titration of bromide into a [Ru(deeb)(bpz)2]2+ (Ru2+, deeb = 4,4'-diethylester-2,2'-bipyridine; bpz = 2,2'-bipyrazine) dichloromethane solution led to the formation of two consecutive ion-paired species, [Ru2+, Br]+ and [Ru2+, 2Br], each with distinct photophysical and electron transfer properties. Formation of the first ion pair was stoichiometric, Keq1 > 106 M1, and the second ion-pair equilibrium was estimated to be Keq2 = 2.4 ± 0.4  105 M‒1. The 1H NMR spectra recorded in deuterated dichloromethane indicated the presence of contact ion-pairs and provided insights into their structures that were complimented by density functional theory calculations...
September 21, 2017: Journal of the American Chemical Society
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