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https://www.readbyqxmd.com/read/27915427/observed-volatilization-fluxes-of-s-metolachlor-and-benoxacor-applied-on-soil-with-and-without-crop-residues
#1
C Bedos, L Alletto, B Durand, O Fanucci, A Brut, M Bourdat-Deschamps, S Giuliano, B Loubet, E Ceschia, P Benoit
Volatilization may represent a major dissipation pathway for pesticides applied to soils or crops, and these losses may be modified by soil surface conditions or in the presence of plant residues. This paper investigates the effect of surface conditions on volatilization through experimental results. The two experiments consisted of volatilization flux measurements for 3 days after an application of S-metolachlor together with benoxacor: one with two wind tunnels to compare the effect of the presence of crop residues on the soil on volatilization losses and another one at the field scale from bare soil without crop residues...
December 3, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27915412/formation-of-indigoidine-derived-pigments-contributes-to-the-adaptation-of-vogesella-sp-strain-eb-to-cold-aquatic-iron-oxidizing-environments
#2
Paula Arrúa Day, María S Villalba, O Marisa Herrero, Luz Alejandra Arancibia, Héctor M Alvarez
We investigated previously under explored cold aquatic environments of Andean Patagonia, Argentina. Oily sheens similar to an oil spill are frequently observed at the surface of water in creeks and small ponds in these places. Chemical analysis of a water sample revealed the occurrence of high concentrations of iron and the presence of a free insoluble indigoidine-derived pigment. A blue pigment-producing bacterium (strain EB) was isolated from the water sample and identified as Vogesella sp. by molecular analysis...
December 3, 2016: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/27915097/effects-of-chronic-lead-exposure-on-bone-mineral-properties-in-femurs-of-growing-rats
#3
Pedro Álvarez-Lloret, Ching Ming Lee, María Inés Conti, Antonela Romina Terrizzi, Santiago González-López, María Pilar Martínez
Lead exposure has been associated with several defective skeletal growth processes and bone mineral alterations. The aim of the present study is to make a more detailed description of the toxic effects of lead intoxication on bone intrinsic material properties as mineral composition, morphology and microstructural characteristics. For this purpose, Wistar rats were exposed (n=12) to 1000ppm lead acetate in drinking water for 90days while control group (n=8) were treated with sodium acetate. Femurs were examined using inductively coupled plasma optical emission spectrometry (ICP-OES), Attenuated Total Reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), and micro-Computed Tomography (μCT)...
November 30, 2016: Toxicology
https://www.readbyqxmd.com/read/27914785/effect-of-macroporous-adsorption-resin-membrane-bioreactor-hybrid-system-against-fouling-for-municipal-wastewater-treatment
#4
Weiwei Chen, Jing Luo, Ruyi Cao, Yuting Li, Jinrong Liu
Membrane bioreactor (MBR) displays significant advantages in effluent quality, sludge production, footprint, and operation. However, membrane fouling limits the application of MBR. This study investigated membrane fouling in a macroporous adsorption resin-membrane bioreactor hybrid system established by adding macroporous adsorption resin (MAR) into MBR. MAR addition increased the critical flux by 27.97%, indicating that membrane fouling was successfully mitigated. Consequently, comparative experiments were designed to analyze the pathway...
November 25, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27914777/polonium-210-accumulates-in-a-lake-receiving-coal-mine-discharges-anthropogenic-or-natural
#5
A W Nelson, E S Eitrheim, A W Knight, D May, M D Wichman, T Z Forbes, M K Schultz
Coal is an integral part of global energy production; however, coal mining is associated with numerous environmental health impacts. It is well documented that coal-mine waste can contaminate the environment with naturally-occurring radionuclides from the uranium-238 ((238)U) decay series. However, the behavior of the final radionuclide in the (238)U-series, i.e., polonium-210 ((210)Po) arising from coal-mine waste-water discharge is largely unexplored. Here, results of a year-long (2014-2015) field study, in which the concentrations of (210)Po in sediments and surface water of a lake that receives coal-mine waste-water discharge in West Virginia are presented...
November 30, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/27914641/reduction-of-neonicotinoid-insecticide-residues-in-prairie-wetlands-by-common-wetland-plants
#6
Anson R Main, Jessica Fehr, Karsten Liber, John V Headley, Kerry M Peru, Christy A Morrissey
Neonicotinoid insecticides are frequently detected in wetlands during the early to mid-growing period of the Canadian Prairie cropping season. These detections also overlap with the growth of macrophytes that commonly surround agricultural wetlands which we hypothesized may reduce neonicotinoid transport and retention in wetlands. We sampled 20 agricultural wetlands and 11 macrophyte species in central Saskatchewan, Canada, over eight weeks to investigate whether macrophytes were capable of reducing movement of neonicotinoids from cultivated fields and/or reducing concentrations in surface water by accumulating insecticide residues into their tissues...
November 30, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27914582/photochemistry-of-nanoporous-carbons-perspectives-in-energy-conversion-and-environmental-remediation
#7
REVIEW
Alicia Gomis-Berenguer, Leticia F Velasco, Inmaculada Velo-Gala, Conchi O Ania
The interest in the use of nanoporous carbon materials in applications related to energy conversion and storage, either as catalysts or additives, has grown over recent decades in various disciplines. Since the early studies reporting the benefits of the use of nanoporous carbons as inert supports of semiconductors and as electron acceptors that enhance the splitting of the photogenerated excitons, many researchers have investigated the key role of carbon matrices coupled to all types of photoactive materials...
November 16, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27914391/frequency-based-noise-coherence-function-extension-and-application-to-passive-bottom-loss-estimation
#8
Lanfranco Muzi, Martin Siderius, Peter L Nielsen
Accurate modeling of acoustic propagation in the ocean waveguide is important to SONAR-performance prediction. Particularly in shallow waters, a crucial contribution to the total transmission loss is the bottom refection loss, which can be estimated passively by beamforming the natural surface-noise acoustic field recorded by a vertical line array of hydrophones. However, the performance in this task of arrays below 2 m of length is problematic for frequencies below 10 kHz It is shown in this paper that, when the data are free of interference from sources other than wind and wave surface noise, data from a shorter array can be used to approximate the coherence function of a longer array...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27914380/an-airborne-acoustic-method-to-reconstruct-a-dynamically-rough-flow-surface
#9
Anton Krynkin, Kirill V Horoshenkov, Timothy Van Renterghem
Currently, there is no airborne in situ method to reconstruct with high fidelity the instantaneous elevation of a dynamically rough surface of a turbulent flow. This work proposes a holographic method that reconstructs the elevation of a one-dimensional rough water surface from airborne acoustic pressure data. This method can be implemented practically using an array of microphones deployed over a dynamically rough surface or using a single microphone which is traversed above the surface at a speed that is much higher than the phase velocity of the roughness pattern...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27914341/single-crystalline-titanium-dioxide-hollow-tetragonal-nanocones-with-large-exposed-101-facets-for-excellent-photocatalysis
#10
Zhengcui Wu, Yejing Xue, Zexian Zou, Xia Wang, Feng Gao
Crystal facet engineering and surface modification of semiconductor have become important strategies to improve photocatalytic activity by optimizing surface charge carrier separation/transfer and extending solar spectrum utilization. In this work, we report anatase single-crystalline TiO2 hollow tetragonal nanocones with large exposed (101) facets by a facile liquid-phase interfacial synthetic strategy, using the hydrolysis of tetrabutyltitanate with adscititious water in the organic solvent of cyclohexane and a capping agent of 1, 6-hexanediamine...
November 23, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27914021/surface-modified-cobalt-ferrite-nanoparticles-for-rapid-capture-detection-and-removal-of-pathogens-a-potential-material-for-water-purification
#11
Raghvendra A Bohara, Nanasaheb D Throat, Nayeem A Mulla, Shivaji H Pawar
Enteric infections resulting from the consumption of contaminated drinking water, inadequate supply of water for personal hygiene, and poor sanitation take a heavy toll worldwide, and developing countries are the major sufferers. Consumption of microbiologically contaminated water leads to diseases such as amoebiasis, cholera, shigellosis, typhoid, and viral infections leading to gastroenteritis and hepatitis B. The present investigation deals with the development of effective method to capture and eliminate microbial contamination of water and improve the quality of water and thus decreasing the contaminated waterborne infections...
December 2, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27913958/the-effect-of-mass-transfer-parameterization-and-ice-retention-on-the-scavenging-and-redistribution-of-so2-by-a-deep-convective-cloud
#12
Vladan Vučković, Dragana Vujović
A chemistry module with the aqueous chemistry coupled with the complex 3D nonhydrostatic atmospheric model is used to investigate how the representation of gas-aqueous mass transfer and ice retention affect the SO2 redistribution in the presence of a convective cloud. Gas uptake to the liquid water is calculated using both Henry's law equilibrium (HE) and kinetic mass transport (KMT). The constant retention coefficients for SO2 (k ret = 0.46) and for H2O2 (k ret = 0.64) are used. It is shown that the amount of SO2 in the air at higher altitudes (10-12 km) is greater when partial retention (PR) is included...
December 2, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27913928/coordination-complexes-of-4-methylimidazole-with-zn-ii-and-cu-ii-in-gas-phase-and-in-water-a-dft-study
#13
Malek Boukallaba, Boutheïna Kerkeni, Christine Lepetit, Dorothée Berthomieu
A quantum chemistry study of mononuclear metal coordination with four 4-methylimidazole ligands (4-MeIm) was investigated. The four complexes [Cu(4-MeIm)4](2+), [Cu(4-MeIm)4, H2O](2+), [Zn(4-MeIm)4](2+) and [Zn(4-MeIm)4, H2O](2+) were studied with particular attention to the Nπ or Nτ possible coordinations of the 4-MeIm ring with the metals, using different DFT methods. The results suggest that the Nτ coordination of 4-MeIm ring to Zn(II) or Cu(II) is more favorable whatever the level of calculation. In contrast, the addition of one water molecule in the first coordination sphere of the metal ions provides five-coordinated complexes showing no Nπ or Nτ preferences...
December 2016: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/27913309/sequence-determinants-of-the-caenhorhabditis-elegansdopamine-transporter-dictating-in-vivoaxonal-export-and-synaptic-localization
#14
Sarah B Robinson, J Andrew Hardaway, Shannon L Hardie, Jane Wright, Ryan M Glynn, Daniel P Bermingham, Qiao Han, Sarah M Sturgeon, Phyllis Freeman, Randy D Blakely
The monoamine neurotransmitter dopamine (DA) acts across phylogeny to modulate both simple and complex behaviors. The presynaptic DA transporter (DAT) is a major determinant of DA signaling capacity in ensuring efficient extracellular DA clearance. In humans, DAT is also a major target for prescribed and abused psychostimulants. Multiple structural determinants of DAT function and regulation have been defined, though largely these findings have arisen from heterologous expression or ex vivo cell culture studies...
November 29, 2016: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/27913241/evaluation-of-highly-branched-cyclic-dextrin-in-inhalable-particles-of-combined-antibiotics-for-the-pulmonary-delivery-of-anti-tuberculosis-drugs
#15
Kazunori Kadota, Arisa Senda, Hideaki Tagishi, John Oluwasogo Ayorinde, Yuichi Tozuka
This work aims to identify a suitable formulation for the pulmonary delivery of combinations of inhalational drugs using highly branched cyclic dextrin (HBCD) macromolecules. We compared the effectiveness between powders prepared from HBCD with those prepared from five alternative excipients (lactose, maltose, sucrose, β-cyclodextrin and methyl β-cyclodextrin) in the pulmonary delivery of a single-dosage form of two anti-tuberculosis drugs (isoniazid and rifampicin). Fine particles of untreated active pharmaceutical ingredients (APIs) and combination products using excipients were prepared by spray drying...
November 29, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27913213/enhanced-efficacy-of-combination-heat-shock-targeted-polymer-therapeutics-with-high-intensity-focused-ultrasound
#16
Nick Frazier, Allison Payne, Christopher Dillon, Nithya Subrahmanyam, Hamidreza Ghandehari
Combination of polymer therapeutics and hyperthermia has been shown to enhance accumulation in selectively heated tumor tissue. The additional use of heat shock (HS)-targeting towards tumor tissues can further enhance accumulation and retention, and improve therapeutic outcomes. In this work, high intensity focused ultrasound (HIFU) was used to generate hyperthermia in prostate tumor tissue. Upregulation of the cell surface HS receptor glucose regulated protein 78kDa (GRP78) was observed after treatment with HIFU hyperthermia which was then targeted by specific HS-targeting peptides...
November 29, 2016: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/27913187/molecular-recognition-of-a-lipophilic-guanosine-derivative-in-langmuir-films-at-the-air-water-interface
#17
Lucija Čoga, Lea Spindler, Stefano Masiero, Irena Drevenšek-Olenik
Molecular recognition of a lipophilic deoxyguanosine derivative at the air-water interface was investigated by film balance experiments and Brewster Angle Microscopy. Results showed that guanosine, despite strong tendency towards self-assembly, interacts with both complementary and noncomplementary liponucleosides (lipophilic derivatives of deoxycytidine and deoxythymidine). At surface pressures below 17 mN/m, attractive and repulsive interactions were present in case of both mixed monolayers and were strongest at guanosine molar fractions of 0...
November 29, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27913024/impact-of-wastewater-treatment-plant-discharge-on-the-contamination-of-river-biofilms-by-pharmaceuticals-and-antibiotic-resistance
#18
Elodie Aubertheau, Thibault Stalder, Leslie Mondamert, Marie-Cécile Ploy, Christophe Dagot, Jérôme Labanowski
Wastewater treatment plants (WWTPs) are one of the main sources of pharmaceutical residue in surface water. Epilithic biofilms were collected downstream from 12 WWTPs of various types and capacities to study the impacts of their discharge through the changes in biofilm composition (compared to a corresponding upstream biofilm) in terms of pharmaceutical concentrations and bacterial community modifications (microbial diversity and resistance integrons). The biofilm is a promising indicator to evaluate the impacts of WWTPs on the surrounding aquatic environment...
November 29, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27913019/persistent-organic-pollutants-in-shallow-percolated-water-of-the-alps-karst-system-zugspitze-summit-germany
#19
Walkiria Levy, Marchela Pandelova, Bernhard Henkelmann, Silke Bernhöft, Norbert Fischer, Felix Antritter, Karl-Werner Schramm
In the German Calcareous Alps at the Zugspitze, percolated water close to a permafrost bedrock in a tunnel system was monitored long-term for polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF), polychlorinated biphenyls (PCB), polycyclic aromatic hydrocarbons (PAH), and 28 organochlorine pesticides (OCP). Semi-permeable membrane devices (SPMD) were deployed in a temporary surface water system at the Zugspitze plateau and analysed for PCB, PAH, and OCP. The high-volume water sampling was successfully implemented and all compounds were identified in the water percolated through the Karst system...
November 30, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27912187/holistic-risk-assessment-of-surface-water-contamination-due-to-pb-210-in-oil-produced-water-from-the-bakken-shale
#20
Luisa Torres, Om Prakash Yadav, Eakalak Khan
A holistic risk assessment of surface water (SW) contamination due to lead-210 (Pb-210) in oil produced water (PW) from the Bakken Shale in North Dakota (ND) was conducted. Pb-210 is a relatively long-lived radionuclide and very mobile in water. Because of limited data on Pb-210, a simulation model was developed to determine its concentration based on its parent radium-226 and historical total dissolved solids levels in PW. Scenarios where PW spills could reach SW were analyzed by applying the four steps of the risk assessment process...
November 29, 2016: Chemosphere
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