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https://www.readbyqxmd.com/read/28820043/rapid-removal-of-chloroform-carbon-tetrachloride-and-trichloroethylene-in-water-by-aluminum-iron-alloy-particles
#1
Jie Xu, Yuan Pu, Xiao Jin Yang, Pingyu Wan, Rong Wang, Peng Song, Adrian Fisher
Water contamination with chlorinated hydrocarbons such as chloroform (CHCl3), carbon tetrachloride (CCl4) and trichloroethylene (TCE) is one of the major public health concerns. In this study, we explored the use of aluminum-iron alloys particles in millimeter scale for rapid removal of CHCl3, CCl4 and TCE from water. Three types of Al-Fe alloy particles containing 10, 20 and 58 wt% of Fe (termed as Al-Fe10, Al-Fe20 and Al-Fe58) were prepared and characterized by electrochemical polarization, X-ray diffraction and energy dispersive spectrometer...
August 18, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28817569/long-term-assessment-of-whale-shark-population-demography-and-connectivity-using-photo-identification-in-the-western-atlantic-ocean
#2
Jennifer A McKinney, Eric R Hoffmayer, Jason Holmberg, Rachel T Graham, William B Driggers, Rafael de la Parra-Venegas, Beatriz E Galván-Pastoriza, Steve Fox, Simon J Pierce, Alistair D M Dove
The predictable occurrence of whale sharks, Rhincodon typus, has been well documented in several areas. However, information relating to their migratory patterns, residency times and connectivity across broad spatial scales is limited. In the present study photo-identification data is used to describe whale shark population structure and connectivity among known aggregation sites within the Western Central Atlantic Ocean (WCA). From 1999 to 2015, 1,361 individuals were identified from four distinct areas: the Yucatan Peninsula, Mexico (n = 1,115); Honduras (n = 146); northern Gulf of Mexico, United States (n = 112), and Belize (n = 49)...
2017: PloS One
https://www.readbyqxmd.com/read/28817080/feasibility-study-of-an-optical-caustic-plasmonic-light-scattering-sensor-for-human-serum-anti-dengue-protein-e-antibody-detection
#3
Antonio A García, Lina S Franco, Miguel A Pirez-Gomez, José L Pech-Pacheco, Jorge F Mendez-Galvan, Carlos Machain-Williams, Lourdes Talavera-Aguilar, José H Espinosa-Carrillo, Miriam M Duarte-Villaseñor, Christian Be-Ortiz, Luz E Espinosa-de Los Monteros, Ariel Castillo-Pacheco, Julian E Garcina-Rejon
Antibody detection and accurate diagnosis of tropical diseases is essential to help prevent the spread of disease. However, most detection methods lack cost-effectiveness and field portability, which are essential features for achieving diagnosis in a timely manner. To address this, 3D-printed oblate spheroid sample chambers were fabricated to measure green light scattering of gold nanoparticles using an optical caustic focus to detect antibodies. Scattering signals of 20-200 nm gold nanoparticles using a green laser were compared to green light emitting diode (LED) light source signals and to Mie theory...
August 17, 2017: Diagnostics
https://www.readbyqxmd.com/read/28811094/-adaptation-and-validation-of-the-smp-t2d-questionnaire-in-spanish-for-evaluating-self-management-of-high-blood-pressure-and-type-2-diabetes-pag-dt2-hta
#4
G M Galván Flores, K Gallegos Carrillo, S Palomo Piñon, S Sánchez García, J Cuadros Moreno, M V Martínez Olivares, J J Cuevas Cancino, I Grijalva, R Sánchez Arenas
BACKGROUND: High blood pressure is one of the most common chronic conditions worldwide. It affects one in every 3 adults over 40, while one in 10 suffers from diabetes. For both diseases, adherence to pharmacological treatment is over 30%, and self-management, which takes into account diet and physical activity, is still unknown, as there is no tool available to measure self-management. Therefore, the object of this study was to adapt and validate the Spanish version of the self-management profile for type 2 diabetes (SMP-T2D) questionnaire in patients with type 2 diabetes and high blood pressure among users of first level care in the social security institution of Mexico...
August 12, 2017: Hipertensión y Riesgo Vascular
https://www.readbyqxmd.com/read/28805337/genetic-favoring-of-pheomelanin-based-pigmentation-limits-physiological-benefits-of-coloniality-in-lesser-kestrels-falco-naumanni
#5
Ismael Galván, Virginia Moraleda, Ignacio Otero, Ernesto Álvarez, Ângela Inácio
Pheomelanin contributes to the pigmentation phenotype of animals by producing orange and light brown colors in the integument. However, pheomelanin synthesis in melanocytes requires consumption of glutathione (GSH), the most important intracellular antioxidant. Therefore, a genetic control favoring the production of large amounts of pheomelanin for pigmentation may lead to physiological costs under environmental conditions that promote oxidative stress. We investigated this possibility in the context of breeding coloniality, a reproductive strategy that may affect oxidative stress...
August 14, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28800390/how-ag-nanospheres-are-transformed-into-agau-nanocages
#6
Liane M Moreau, Charles A Schurman, Sumit Kewalramani, Mohammad M Shahjamali, Chad A Mirkin, Michael J Bedzyk
Bimetallic hollow, porous noble metal nanoparticles are of broad interest for biomedical, optical and catalytic applications. The most straightforward method for preparing such structures involves the reaction between HAuCl4 and well-formed Ag particles, typically spheres, cubes, or triangular prisms, yet the mechanism underlying their formation is poorly understood at the atomic scale. By combining in situ nanoscopic and atomic-scale characterization techniques (XAFS, SAXS, XRF, and electron microscopy) to follow the process, we elucidate a plausible reaction pathway for the conversion of citrate-capped Ag nanospheres to AgAu nanocages; importantly, the hollowing event cannot be explained by the nanoscale Kirkendall effect, nor by Galvanic exchange alone, two processes that have been previously proposed...
August 11, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28798718/vestibular-modulation-of-sympathetic-nerve-activity-to-muscle-and-skin-in-humans
#7
REVIEW
Elie Hammam, Vaughan G Macefield
We review the existence of vestibulosympathetic reflexes in humans. While several methods to activate the human vestibular apparatus have been used, galvanic vestibular stimulation (GVS) is a means of selectively modulating vestibular afferent activity via electrodes over the mastoid processes, causing robust vestibular illusions of side-to-side movement. Sinusoidal GVS (sGVS) causes partial entrainment of sympathetic outflow to muscle and skin. Modulation of muscle sympathetic nerve activity (MSNA) from vestibular inputs competes with baroreceptor inputs, with stronger temporal coupling to the vestibular stimulus being observed at frequencies remote from the cardiac frequency; "super entrainment" was observed in some individuals...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28797521/increasing-chloride-in-rivers-of-the-conterminous-u-s-and-linkages-to-potential-corrosivity-and-lead-action-level-exceedances-in-drinking-water
#8
E G Stets, C J Lee, D A Lytle, M R Schock
Corrosion in water-distribution systems is a costly problem and controlling corrosion is a primary focus of efforts to reduce lead (Pb) and copper (Cu) in tap water. High chloride concentrations can increase the tendency of water to cause corrosion in distribution systems. The effects of chloride are also expressed in several indices commonly used to describe the potential corrosivity of water, the chloride-sulfate mass ratio (CSMR) and the Larson Ratio (LR). Elevated CSMR has been linked to the galvanic corrosion of Pb whereas LR is indicative of the corrosivity of water to iron and steel...
July 25, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28797069/biodegradability-and-platelets-adhesion-assessment-of-magnesium-based-alloys-using-a-microfluidic-system
#9
Lumei Liu, Youngmi Koo, Boyce Collins, Zhigang Xu, Jagannathan Sankar, Yeoheung Yun
Magnesium (Mg)-based stents are extensively explored to alleviate atherosclerosis due to their biodegradability and relative hemocompatibility. To ensure the quality, safety and cost-efficacy of bioresorbable scaffolds and full utilization of the material tunability afforded by alloying, it is critical to access degradability and thrombosis potential of Mg-based alloys using improved in vitro models that mimic as closely as possible the in vivo microenvironment. In this study, we investigated biodegradation and initial thrombogenic behavior of Mg-based alloys at the interface between Mg alloys' surface and simulated physiological environment using a microfluidic system...
2017: PloS One
https://www.readbyqxmd.com/read/28791866/short-and-long-term-lead-release-after-partial-lead-service-line-replacements-in-a-metropolitan-water-distribution-system
#10
Elise Deshommes, Laurent Laroche, Dominique Deveau, Shokoufeh Nour, Michèle Prévost
Thirty-three households were monitored in a full-scale water distribution system, to investigate the impact of recent (<2 yr) or old partial lead service line replacements (PLSLRs). Total and particulate lead concentrations were measured using repeat sampling over a period of 1-20 months. Point-of-entry filters were installed to capture sporadic release of particulate lead from the lead service lines (LSLs). Mean concentrations increased immediately after PLSLRs and erratic particulate lead spikes were observed over the 18 month post-PLSLR monitoring period...
August 9, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28783652/a-parametric-computational-analysis-into-galvanic-coupling-intrabody-communication
#11
M Amparo Callejon, P Del Campo, Javier Reina-Tosina, Laura M Roa
Intrabody Communication (IBC) uses the human body tissues as transmission media for electrical signals to interconnect personal health devices in wireless body area networks. The main goal of this work is to conduct a computational analysis covering some bioelectric issues that still have not been fully explained, such as the modeling of the skin-electrode impedance, the differences associated to the use of constant voltage or current excitation modes, or the influence on attenuation of the subject's anthropometrical and bioelectric properties...
August 2, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28783491/adaptation-of-postural-recovery-responses-to-a-vestibular-sensory-illusion-in-individuals-with-parkinson-disease-and-healthy-controls
#12
Mark E Lester, James T Cavanaugh, K Bo Foreman, Scott W Shaffer, Robin Marcus, Leland E Dibble
BACKGROUND: The ability to adapt postural responses to sensory illusions diminishes with age and is further impaired by Parkinson disease. However, limited information exists regarding training-related adaptions of sensory reweighting in these populations. METHODS: This study sought to determine whether Parkinson disease or age would differentially affect acute postural recovery or adaptive postural responses to novel or repeated exposure to sensory illusions using galvanic vestibular stimulation during quiet stance...
July 26, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28783302/monolayer-growth-front-of-precious-metals-through-insulating-mesoporous-membranes
#13
Nicholas Linck, Alex Peek, Bruce J Hinds
Monolayers of precious metals are deposited within the pores of insulating mesoporous anodized aluminum oxide (AAO) membranes via a new electrochemical underpotential Cu deposition growth front mechanism, followed by spontaneous galvanic replacement of copper by platinum or iridium as demonstrated by XPS, ICP-OES, conductivity, and current analysis. Applications include fuel cells, hydrogen storage, flow batteries, and electrocatalytic conversions.
August 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28780359/change-regularity-of-water-quality-parameters-in-leakage-flow-conditions-and-their-relationship-with-iron-release
#14
Jingqing Liu, Huabin Shentu, Huanyu Chen, Ping Ye, Bing Xu, Yifu Zhang, Hamid Bastani, Hongxi Peng, Lei Chen, Tuqiao Zhang
The long-term stagnation in metal water supply pipes, usually caused by intermittent consumption patterns, will cause significant iron release and water quality deterioration, especially at the terminus of pipelines. Another common phenomenon at the terminus of pipelines is leakage, which is considered helpful by allowing seepage of low-quality drinking water resulting from long-term stagnation. In this study, the effect of laminar flow on alleviating water quality deterioration under different leakage conditions was investigated, and the potential thresholds of the flow rate, which can affect the iron release process, were discussed...
July 16, 2017: Water Research
https://www.readbyqxmd.com/read/28777996/neural-connectivity-moderates-the-association-between-sleep-and-impulsivity-in-adolescents
#15
Sarah M Tashjian, Diane Goldenberg, Adriana Galván
Adolescence is characterized by chronic insufficient sleep and extensive brain development, but the relation between adolescent sleep and brain function remains unclear. We report the first functional magnetic resonance imaging study to investigate functional connectivity as a moderator between sleep and impulsivity, a problematic behavior during this developmental period. Naturalistic differences in sleep have not yet been explored as treatable contributors to adolescent impulsivity. Although public and scientific attention focuses on sleep duration, we report individual differences in sleep quality, not duration, in fifty-five adolescents (ages 14-18) yielded significant differences in functional connectivity between the prefrontal cortex and default mode network...
July 26, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28777556/metal-organic-framework-templated-chemiresistor-sensing-type-transition-from-p-to-n-using-hollow-metal-oxide-polyhedron-via-galvanic-replacement
#16
Ji-Soo Jang, Won-Tae Koo, Seon-Jin Choi, Il-Doo Kim
Facile synthesis of porous nanobuilding blocks with high surface area and uniform catalyst functionalization has always been regarded as an essential requirement for the development of highly sensitive and selective chemical sensors. Metal-organic frameworks (MOFs) are considered as one of the most ideal templates due to their ability to encapsulate ultra-small catalytic nanoparticles (NPs) in microporous MOF structures in addition to easy removal of the sacrificial MOF scaffold by calcination. Here we introduce a MOFs derived n-type SnO2 (n-SnO2) sensing layer with hollow polyhedron structures, obtained from p-n transition of MOF-templated p-type Co3O4 (p-Co3O4) hollow cubes during galvanic replacement reaction (GRR)...
August 4, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28774594/tissue-and-circulating-microrna-co-expression-analysis-reveals-potential-involvement-of-mirnas-in-the-pathobiology-of-frontal-fibrosing-alopecia
#17
Christos Tziotzios, Chrysanthi Ainali, Susan Holmes, Fiona Cunningham, Su M Lwin, Ioulios Palamaras, Kapil Bhargava, Janice Rymer, Catherine Stefanato, Niall Kirkpatrick, Sergio Vano-Galvan, Christos Petridis, David A Fenton, Michael A Simpson, Alexandros Onoufriadis, John A McGrath
No abstract text is available yet for this article.
July 31, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28774441/a-real-time-stress-classification-system-based-on-arousal-analysis-of-the-nervous-system-by-an-f-state-machine
#18
R Martinez, E Irigoyen, A Arruti, J I Martin, J Muguerza
BACKGROUND AND OBJECTIVE: Detection and labelling of an increment in the human stress level is a contribution focused principally on improving the quality of life of people. This work is aimed to develop a biophysical real-time stress identification and classification system, analysing two noninvasive signals, the galvanic skin response and the heart rate variability. METHODS: An experimental procedure was designed and configured in order to elicit a stressful situation that is similar to those found in real cases...
September 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28774033/the-effect-of-cu-ag-atomic-ratio-on-the-properties-of-sputtered-cu-ag-alloy-thin-films
#19
Janghsing Hsieh, Shunyang Hung
Cu-Ag thin films with various atomic ratios were prepared using a co-sputtering technique, followed by rapid thermal annealing at various temperatures. The films' structural, mechanical, and electrical properties were then characterized using X-ray diffractometry (XRD), atomic force microscopy (AFM), FESEM, nano-indentation, and TEM as functions of compositions and annealing conditions. In the as-deposited condition, the structure of these films transformed from a one-phase to a dual-phase state, and the resistivity shows a twin-peak pattern, which can be explained in part by Nordheim's Rule and the miscibility gap of Cu-Ag alloy...
November 10, 2016: Materials
https://www.readbyqxmd.com/read/28773788/corrosion-behavior-and-strength-of-dissimilar-bonding-material-between-ti-and-mg-alloys-fabricated-by-spark-plasma-sintering
#20
Patchara Pripanapong, Shota Kariya, Tachai Luangvaranunt, Junko Umeda, Seiichiro Tsutsumi, Makoto Takahashi, Katsuyoshi Kondoh
Ti and solution treated Mg alloys such as AZ31B (ST), AZ61 (ST), AZ80 (ST) and AZ91 (ST) were successfully bonded at 475 °C by spark plasma sintering, which is a promising new method in welding field. The formation of Ti₃Al intermetallic compound was found to be an important factor in controlling the bonding strength and galvanic corrosion resistance of dissimilar materials. The maximum bonding strength and bonding efficiency at 193 MPa and 96% were obtained from Ti/AZ91 (ST), in which a thick and uniform nano-level Ti₃Al layer was observed...
August 6, 2016: Materials
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