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https://www.readbyqxmd.com/read/28335574/proof-of-concept-development-of-snow-liquid-water-content-profiler-using-cs650-reflectometers-at-caribou-me-usa
#1
Carlos L Pérez Díaz, Jonathan Muñoz, Tarendra Lakhankar, Reza Khanbilvardi, Peter Romanov
The quantity of liquid water in the snowpack defines its wetness. The temporal evolution of snow wetness's plays a significant role in wet-snow avalanche prediction, meltwater release, and water availability estimations and assessments within a river basin. However, it remains a difficult task and a demanding issue to measure the snowpack's liquid water content (LWC) and its temporal evolution with conventional in situ techniques. We propose an approach based on the use of time-domain reflectometry (TDR) and CS650 soil water content reflectometers to measure the snowpack's LWC and temperature profiles...
March 21, 2017: Sensors
https://www.readbyqxmd.com/read/28335439/mercury-levels-in-human-hair-and-farmed-fish-near-artisanal-and-small-scale-gold-mining-communities-in-the-madre-de-dios-river-basin-peru
#2
Aubrey L Langeland, Rebecca D Hardin, Richard L Neitzel
Artisanal and small-scale gold mining (ASGM) has been an important source of income for communities in the Madre de Dios River Basin in Peru for hundreds of years. However, in recent decades, the scale of ASGM activities in the region has increased dramatically, and exposures to a variety of occupational and environmental hazards related to ASGM, including mercury, are becoming more widespread. The aims of our study were to: (1) examine patterns in the total hair mercury level of human participants in several communities in the region and compare these results to the 2...
March 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28335276/flexible-textile-based-organic-transistors-using-graphene-ag-nanoparticle-electrode
#3
Youn Kim, Yeon Ju Kwon, Kang Eun Lee, Youngseok Oh, Moon-Kwang Um, Dong Gi Seong, Jea Uk Lee
Highly flexible and electrically-conductive multifunctional textiles are desirable for use in wearable electronic applications. In this study, we fabricated multifunctional textile composites by vacuum filtration and wet-transfer of graphene oxide films on a flexible polyethylene terephthalate (PET) textile in association with embedding Ag nanoparticles (AgNPs) to improve the electrical conductivity. A flexible organic transistor can be developed by direct transfer of a dielectric/semiconducting double layer on the graphene/AgNP textile composite, where the textile composite was used as both flexible substrate and conductive gate electrode...
August 16, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335201/size-and-shape-dependent-antibacterial-studies-of-silver-nanoparticles-synthesized-by-wet-chemical-routes
#4
Muhammad Akram Raza, Zakia Kanwal, Anum Rauf, Anjum Nasim Sabri, Saira Riaz, Shahzad Naseem
Silver nanoparticles (AgNPs) of different shapes and sizes were prepared by solution-based chemical reduction routes. Silver nitrate was used as a precursor, tri-sodium citrate (TSC) and sodium borohydride as reducing agents, while polyvinylpyrrolidone (PVP) was used as a stabilizing agent. The morphology, size, and structural properties of obtained nanoparticles were characterized by scanning electron microscopy (SEM), UV-visible spectroscopy (UV-VIS), and X-ray diffraction (XRD) techniques. Spherical AgNPs, as depicted by SEM, were found to have diameters in the range of 15 to 90 nm while lengths of the edges of the triangular particles were about 150 nm...
April 15, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335093/carbohydrate-and-lipid-spectroscopic-molecular-structures-of-different-alfalfa-hay-and-their-relationship-with-nutrient-availability-in-ruminants
#5
Mojtaba Yari, Reza Valizadeh, Abbas Ali Naserian, Arjan Jonker, Peiqiang Yu
Objective: This study was conducted to determine molecular structures related to carbohydrates and lipid in alfalfa hay cut at early bud, late bud and early flower and in the afternoon and next morning using Fourier Transform Infrared Spectroscopy (FT/IR) and to determine their relationship with alfalfa hay nutrient profile and availability in ruminants. Methods: Chemical composition analysis, carbohydrate fractionation, in situ ruminal degradability and DVE/OEB model were used to measure nutrient profile and availability of alfalfa hay...
March 21, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28334553/a-multi-matrix-hilic-ms-ms-method-for-the-quantitation-of-endogenous-small-molecule-neurological-biomarker-n-acetyl-aspartic-acid-naa
#6
Dewakar Sangaraju, Sheerin K Shahidi-Latham, Braydon L Burgess, Brian Dean, Xiao Ding
A multi-matrix hydrophilic interaction liquid chromatography tandem mass spectrometric method (HILIC-MS/MS) was developed for the quantitation of N-Acetyl Aspartic acid (NAA) using stable isotope labeled internal standard, D3-NAA in various biological matrices such as human plasma, human CSF, mouse plasma, brain and spinal cord. A high throughput 96-well plate format supported liquid extraction (SLE) procedure was developed and used for sample preparation. Mass spectrometric analysis of NAA was performed using selected reaction monitoring transitions in positive electrospray ionization mode...
March 14, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28334221/enhanced-pest-ant-control-with-hydrophobic-bait
#7
R K Vander Meer, D E Milne
The red imported fire ant, Solenopsis invicta (Buren), left most of its natural enemies behind in South America when it arrived in Mobile, AL, in the 1930s and spread rapidly throughout the southeastern United States, reaching population levels up to 10 times those found in South America. The large population densities and propensity for disturbed habitats led to direct conflict with human activities. Bait control methods were first developed for fire ants in the early 1960s and little has changed in the subsequent decades, despite the drawback that the bait carrier rapidly breaks down when wet...
February 20, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28333675/basics-of-compounding-compounding-films
#8
Loyd V Allen
Films, which are a dosage form designed to dissolve on contact with a wet surface within a very short time, are thin sheets placed in the oral cavity for dissolution and absorption of the active drug. This dosage form is gaining popularity because of its convenience. Discussed within this article are the applications, advantages/disadvantages, composition, preparation, physicochemical considerations, quality control, packaging/labeling/storage, stability, and formulation considerations as they relate to films...
July 2016: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28333458/declining-trends-of-polychlorinated-naphthalenes-in-seabird-eggs-from-the-canadian-arctic-1975-2014
#9
Birgit M Braune, Derek C G Muir
There are relatively few studies of polychlorinated naphthalenes (PCNs) for biota in polar regions and even fewer reports of temporal trends. We determined concentrations of PCNs in eggs of thick-billed murres (Uria lomvia) collected from the Canadian high Arctic between 1975 and 2014 and calculated their associated toxic equivalents (TEQs). Concentrations of Σ67PCN decreased significantly in the murre eggs between 1975 and 2014 at an average annual rate of -14.9 pg g(-1) wet weight. Although the penta- and tetra-CNs (predominantly CN-52/60 and CN-42) dominated the PCN profile, the hexa-CNs (mainly CN-66/67) accounted for the majority of the Σ67TEQ-PCN, concentrations of which also decreased significantly between 1975 to 2014...
March 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28333171/dual-dimensional-nanostructures-with-highly-durable-non-wetting-properties-under-dynamic-and-underwater-conditions
#10
Seunghyeon Baek, Wuseok Kim, Sangmin Jeon, Kijung Yong
Non-wetting states with high durability under both dynamic and underwater conditions are very desirable for practical applications of superhydrophobic surfaces in various fields. Despite increasing demands for this dual stability of non-wetting surfaces, studies investigating both the impact dynamics and underwater stability are very rare. In the current study, we performed water droplet impact dynamics and underwater stability studies using ZnO/Si hierarchical nanostructures (HNs) as a model system. The effects of the surface structure on the non-wetting states under dynamic conditions were first studied by comparing various surface structures, such as ZnO nanowires (NWs), Si microposts (MPs), ZnO/Si HNs with controlled MP interspacings, and lotus leaf (LL)...
March 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28333156/an-in-vitro-bacterial-surface-migration-assay-underneath-sterile-barrier-material-commonly-found-in-a-hospital-setting
#11
J D Shih, L S Y Wood, C L Dambkowski, S Torres, E F Chehab, R Venook, J K Wall
OBJECTIVE: To determine what barrier material used in hospital neonatal intensive care units most effectively blocks bacterial migration. STUDY DESIGN: Bacterial migration distance was compared across simple and complex solid media using Escherichia coli, an early and common neonatal gut colonizer, and Staphylococcus aureus, a common skin bacterium, across polystyrene, medical-grade silicone, hydrocolloid dressing and transparent film dressing as barrier materials on complex solid media...
March 23, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28333054/removal-of-organic-phosphorus-and-formaldehyde-in-glyphosate-wastewater-by-cwo-and-the-lime-catalyzed-formose-reaction
#12
Bo Xing, Honglin Chen, Xiaoming Zhang
Glyphosate (PMG) wastewater with 40-600 mg/L organic phosphorus (OP) and 1-4% CH2O was treated by catalytic wet oxidation (CWO) and the lime-catalyzed formose reaction to remove total phosphorus (TP) and improve biodegradability. Activated carbons (ACs) modified by H2O2 oxidation and thermal treatment with melamine were used as CWO catalysts and characterized by N2 adsorption/desorption and XPS. The CWO experiments were performed in an autoclave reactor at 110-130 °C and 1.0 MPa. The modified AC showed higher catalytic activity than the parent AC due to the introduction of nitrogen-containing functional groups, exhibited over 90% OP removal for various real PMG wastewaters, and had good stability for 20 consecutive CWO runs...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28332926/efficient-degradation-of-organic-phosphorus-in-glyphosate-wastewater-by-catalytic-wet-oxidation-using-modified-activated-carbon-as-a-catalyst
#13
Bo Xing, Honglin Chen, Xiaoming Zhang
Glyphosate (PMG) wastewater, which is an organic phosphorus (OP) wastewater containing 200-3000 mg/L glyphosate, was treated via catalytic wet oxidation (CWO) to degrade glyphosate to orthophosphate (PO4(3-)). The catalysts were activated carbons (ACs) modified by H2O2 oxidation and thermal treatment with ammonia or melamine. The catalysts were characterized using N2 adsorption/desorption, Boehm titration, and XPS. The CWO experiments were performed in a co-current upflow fixed bed reactor at 110-130 °C and under 1...
March 23, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28332469/marrying-step-feed-with-clarifier-improvements-increase-wet-weather-capacity-integrated-methodology
#14
Glen T Daigger John S Siczka Thomas F Smith David A Frank J A McCorquodale
The need to increase the peak wet weather secondary treatment capacity of the City of Akron, OH, Water Reclamation Facility (WRF) provided the opportunity to test an integrated methodology for maximizing the peak wet weather secondary treatment capacity of activated sludge systems. An initial investigation, consisting of process modeling of the secondary treatment system and computational fluid dynamics (CFD) analysis of the existing relatively shallow secondary clarifiers (3.3 and 3.7 m sidewater depth in 30...
March 22, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28332396/salinity-dependent-contact-angle-alteration-in-oil-brine-silicate-systems-the-critical-role-of-divalent-cations
#15
Martin E J Haagh, Igor Siretanu, Michael H G Duits, Frieder Mugele
The effectiveness of water flooding oil recovery depends to an important extent on the competitive wetting of oil and water on the solid rock matrix. Here, we use macroscopic contact angle goniometry in highly idealized model systems to evaluate how brine salinity affects the balance of wetting forces and to infer the microscopic origin of the resulting contact angle alteration. We focus in particular on two competing mechanisms debated in the literature, namely double layer expansion and divalent cation bridging...
March 23, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28332204/evaluation-of-hmw-gs-20-and-2-2-from-near-isogenic-lines-nils-of-wheat-variety-hd2329-for-bread-quality-improvement
#16
Sonia Goel, Sapna Grewal, N K Singh
BACKGROUND: Hexaploid wheat (Triticum aestivum L.) dominates the list of the most important human food sources ever. Its complex genetic background is the reason behind the wide diversity that exists in nutritional as well as food end- product quality. High molecular weight glutenin subunits (HMW-GS) are the main grain storage proteins in the endosperm of wheat and related species. It is well established that the composition and quantity of allelic variation in (HMW-GS) genes substantially affect the taste and appearance of dough products and therefore work in this area is highly desired...
March 23, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28331413/resurrection-of-bronchocela-burmana-blanford-1878-for-the-green-crested-lizard-squamata-agamidae-of-southern-myanmar
#17
George R Zug, Daniel G Mulcahy, Jens V Vindum
Recent fieldwork in southern Tanintharyi revealed the presence of a small Green Crested Lizard in the wet evergreen forest. We generated mtDNA sequence data (ND2) that demonstrates that this population's nearest relative is Bronchocela rayaensis Grismer et al., 2015 of Pulau Langkawi, northwestern Peninsular Malaysia and Phuket Island. Morphologically the Burmese Bronchocela shares many features with Bronchocela rayaensis, which potentially would make this recently described Thai-Malay species a synonym of Bronchocela burmana Blanford, 1878; however, we interpret the genetic and morphological differences to reflect evolutionary divergence and recommend the recognition of both species...
2017: ZooKeys
https://www.readbyqxmd.com/read/28331234/effect-of-vertically-oriented-few-layer-graphene-on-the-wettability-and-interfacial-reactions-of-the-agcuti-sio2f-sio2-system
#18
Z Sun, L X Zhang, J L Qi, Z H Zhang, T D Hao, J C Feng
With the aim of expanding their applications, particularly when joining metals, a simple but effective method is reported whereby the surface chemical reactivity of SiO2f/SiO2 (SiO2f/SiO2 stands for silica fibre reinforced silica based composite materials and f is short for fibre) composites with vertically oriented few-layer graphene (VFG, 3-10 atomic layers of graphene vertically oriented to the substrate) can be tailored. VFG was uniformly grown on the surface of a SiO2f/SiO2 composite by using plasma enhanced chemical vapour deposition (PECVD)...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28330341/wetting-at-the-nanoscale-a-molecular-dynamics-study
#19
Mohammad Khalkhali, Nasser Kazemi, Hao Zhang, Qingxia Liu
A novel method to calculate the solid-liquid contact angle is introduced in this study. Using the 3D configuration of a liquid droplet on a solid surface, this method calculates the contact angle along the contact line and provides an angular distribution. Although this method uses the 3D configuration of liquid droplets, it does not require the calculation of the 3D density profile to identify the boundaries of the droplet. This decreases the computational cost of the contact angle calculation greatly. Moreover, no presumption about the shape of the liquid droplet is needed when using the method introduced in this study...
March 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28330198/pretreatment-and-enzymatic-process-modification-strategies-to-improve-efficiency-of-sugar-production-from-sugarcane-bagasse
#20
Siddhartha Pal, Shereena Joy, Kalpana D Trimukhe, Pramod S Kumbhar, Anjani J Varma, Sasisanker Padmanabhan
Pretreatment and enzymatic hydrolysis play a critical role in the economic production of sugars and fuels from lignocellulosic biomass. In this study, we evaluated diverse pilot-scale pretreatments and different post-pretreatment strategies for the production of fermentable sugars from sugarcane bagasse. For the pretreatment of bagasse at pilot-scale level, steam explosion without catalyst and combination of sulfuric and oxalic acids at low and high loadings were used. Subsequently, to enhance the efficiency of enzymatic hydrolysis of the pretreated bagasse, three different post-pretreatment process schemes were investigated...
December 2016: 3 Biotech
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