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https://www.readbyqxmd.com/read/28810226/rapid-removal-of-organic-pollutants-by-activation-sulfite-with-ferrate
#1
Jing Zhang, Liang Zhu, Zhenyu Shi, Ying Gao
With the addition of sulfite, almost complete removal of seven out of eight tested contaminants, i.e. benzotriazole, phenol, ciprofloxacin, methyl blue, rhodamine B, methyl orange and sulfamethoxazole, was observed in 30 s except for sulfamethoxazole at pH 9.0, while Fe(VI) alone only resulted in less than 6% removal. In this study, the mechanism of sulfite/Fe(VI) process was explored for the first time. Firstly, sulfite attacks Fe(VI) via a 1-e(-) transfer forming the primary sulfite radical (SO3(-)), then SO3(-) reacts rapidly with oxygen in a diffusion controlled rate to form a much more reactive peroxyl radical SO5(-), which further reacts with HSO3(-) and produces SO4(-)...
July 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/28807731/time-resolved-generation-of-membrane-potential-by-ba3-cytochrome-c-oxidase-from-thermus-thermophilus-coupled-to-single-electron-injection-into-the-o-and-oh-states
#2
Sergey A Siletsky, Ilya Belevich, Nikolay P Belevich, Tewfik Soulimane, Mårten Wikström
Two electrogenic phases with characteristic times of ~14μs and ~290μs are resolved in the kinetics of membrane potential generation coupled to single-electron reduction of the oxidized "relaxed" O state of ba3 oxidase from T. thermophilus (O→E transition). The rapid phase reflects electron redistribution between CuA and heme b. The slow phase includes electron redistribution from both CuA and heme b to heme a3, and electrogenic proton transfer coupled to reduction of heme a3. The distance of proton translocation corresponds to uptake of a proton from the inner water phase into the binuclear center where heme a3 is reduced, but there is no proton pumping and no reduction of CuB...
August 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28807564/reduced-metallic-artefacts-in-3%C3%A2-t-knee-mri-using-fast-spin-echo-multi-point-dixon-compared-to-fast-spin-echo-t2-weighted-sequences
#3
H J Park, S Y Lee, S H Choi, H P Hong, Y J Choi, M S Kim
AIM: To compare multi-point Dixon magnetic resonance imaging (MRI) and fast spin-echo (FSE) T2-weighted imaging (WI) with regard to the size of metallic artefacts when imaging the knee joint. MATERIALS AND METHODS: A total of 42 patients who underwent anterior cruciate ligament (ACL) reconstruction and follow-up imaging with 3 T MRI using the multi-point Dixon technique was included in this retrospective study. The maximal distance of the image distortion area around the metallic artefact was measured (interference screw of femoral tunnel area) on sagittal images of both FSE T2WI (T2WI and fat-suppressed [FS] T2WI) and multi-point Dixon (water only image and in-phase image) sequences...
August 11, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28803071/responses-of-szarvasi-1-energy-grass-to-sewage-sludge-treatments-in-hydroponics
#4
Ambrus Rév, Brigitta Tóth, Ádám Solti, Gyula Sipos, Ferenc Fodor
Sewage sludge (SS) originating from communal wastewater is a hazardous material but have a potentially great nutritive value. Its disposal after treatment in agricultural lands can be a very economical and safe way of utilization once fast growing, high biomass, perennial plants of renewable energy production are cultivated. Szarvasi-1 energy grass (Elymus elongatus subsp. ponticus cv. Szarvasi-1), a good candidate for this application, was grown in hydroponics in order to assess its metal accumulation and tolerance under increasing SS amendments...
August 1, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28801918/motion-compensation-in-the-region-of-the-coronary-arteries-based-on-partial-angle-reconstructions-from-short-scan-ct-data
#5
Juliane Hahn, Herbert Bruder, Christopher Rohkohl, Thomas Allmendinger, Karl Stierstorfer, Thomas Flohr, Marc Kachelrieß
PURPOSE: In order to mitigate motion-induced artifacts, several motion compensation (MoCo) methods have been developed, which are either able to a) compensate for severe artifacts, but utilize the data for the reconstruction of several cardiac phases, or b) improve image quality of a single reconstruction with only moderate motion artifacts. We propose a method combining both benefits: dose efficiency by utilizing only the data needed for a single short-scan reconstruction while still being able to compensate for severe artifacts...
August 12, 2017: Medical Physics
https://www.readbyqxmd.com/read/28796442/total-environmental-impacts-of-biofuels-from-corn-stover-using-a-hybrid-life-cycle-assessment-lca-model-combining-process-lca-and-economic-input-output-lca
#6
Changqi Liu, Yaji Huang, Xinye Wang, Yang Tai, Lingqin Liu, Hao Liu
Studies on the environmental analysis of biofuels by fast pyrolysis and hydroprocessing (BFPH) have so far only focused on the environmental impacts from direct emissions and included few indirect emissions. The influence of ignoring some indirect emissions on the environmental performance of BFPH has not been well investigated and hence is not really understood. In addition, in order to avoid shifting environmental problems from one media to another, a comprehensive assessment of environmental impacts caused by the processes must quantify the environmental emissions to all media (air, water, and land) in relation to each life cycle stage...
August 10, 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/28793810/remote-sensing-tropical-coral-reefs-the-view-from-above
#7
Sam J Purkis
Carbonate precipitation has been a common life strategy for marine organisms for 3.7 billion years, as, therefore, has their construction of reefs. As favored by modern corals, reef-forming organisms have typically adopted a niche in warm, shallow, well-lit, tropical marine waters, where they are capable of building vast carbonate edifices. Because fossil reefs form water aquifers and hydrocarbon reservoirs, considerable effort has been dedicated to understanding their anatomy and morphology. Remote sensing has a particular role to play here...
August 9, 2017: Annual Review of Marine Science
https://www.readbyqxmd.com/read/28792045/rapid-fabrication-of-bio-inspired-nanostructure-with-hydrophobicity-and-antireflectivity-on-polystyrene-surface-replicating-from-cicada-wings
#8
Heng Xie, Han-Xiong Huang, Yu-Jiang Peng
The fine nanostructure on the cicada wing of Cryptotympana atrata fabricius, which exhibits hydrophobicity and antireflectivity, is carefully examined. A promising strategy is proposed for facilely and successively replicating the natural functional nanostructure of the cicada wing onto polystyrene (PS) surfaces. First, a nickel replica with tapered nanopores is fabricated by combining electroless plating and subsequent electroplating with the natural cicada wing as an original template. Then, using microinjection compression molding, with the nickel replica as a template, the tapered nanopores are transcribed onto the PS surface, resulting in orderly and densely arranged nanopillars with a mean diameter of about 156 nm and a mean pitch of about 180 nm...
August 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28783885/performance-of-life-support-breathing-apparatus-for-under-ice-diving-operations
#9
Michael A Lang, John R Clarke
INTRODUCTION: Single-hose scuba regulators dived in very cold water may suffer first- or second-stage malfunction, yielding complete occlusion of air flow or massive freeflow that rapidly expends a diver's air supply. PURPOSE: This study, conducted in Antarctica, evaluated the under-ice performance of a sampling of commercially available regulators. METHODS: Seventeen science divers logged a total of 305 dives in -1.86°C seawater under 6-meter-thick Antarctic fast-ice over two field seasons in 2008 and 2009...
July 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/28783498/a-fe-ii-citrate-uv-pms-process-for-carbamazepine-degradation-at-a-very-low-fe-ii-pms-ratio-and-neutral-ph-the-mechanisms
#10
Li Ling, Dapeng Zhang, Chihhao Fan, Chii Shang
A novel Fe(II)/citrate/UV/PMS process for degrading a model micropollutant, carbamazepine (CBZ), at a low Fe(II)/PMS ratio and neutral pH has been proposed in this study, and the mechanisms of radical generation in the system was explored. With a UV dose of 302.4 mJ/cm(2), an initial pH of 7, and CBZ, PMS, Fe(II) and citrate at initial concentrations of 10, 100, 12 and 26 μM, respectively, the CBZ degradation efficiency reached 71% in 20 min in the Fe(II)/citrate/UV/PMS process, which was 4.7 times higher than that in either the citrate/UV/PMS or Fe(II)/citrate/PMS process...
July 27, 2017: Water Research
https://www.readbyqxmd.com/read/28769996/a-procedure-for-maize-genotypes-discrimination-to-drought-by-chlorophyll-fluorescence-imaging-rapid-light-curves
#11
Carlos Antônio Ferreira de Sousa, Dayane Silva de Paiva, Raphael Augusto das Chagas Noqueli Casari, Nelson Geraldo de Oliveira, Hugo Bruno Correa Molinari, Adilson Kenji Kobayashi, Paulo Cesar Magalhães, Reinaldo Lúcio Gomide, Manoel Teixeira Souza
BACKGROUND: Photosynthesis can be roughly separated into biochemical and photochemical processes. Both are affected by drought and can be assessed by non-invasive standard methods. Gas exchange, which mainly assesses the first process, has well-defined protocols. It is considered a standard method for evaluation of plant responses to drought. Under such stress, assessment of photochemical apparatus by chlorophyll fluorescence needs improvement to become faster and reproducible, especially in growing plants under field conditions...
2017: Plant Methods
https://www.readbyqxmd.com/read/28761485/molecular-determination-of-fasciola-spp-isolates-from-domestic-ruminants-fecal-samples-in-the-northwest-of-iran
#12
Abbas Imani Baran, Habib Cheraghi Saray, Farzad Katiraee
BACKGROUND: Fasciola species are the main causes for fascioliasis with great financial losses and are among the most important food/water-borne parasites worldwide. The basic proceedings such as epidemiology and effective control of fascioliasis rely mainly on precise identification of Fasciola species. The present study was conducted to determine the Fasciola species in ruminant fecal samples from East Azerbaijan Province in Iran. METHODS: Overall, 2012 fecal samples were collected and processed initially for microscopic examination of Fasciola eggs in 2014-15...
April 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28751633/chemical-characterization-of-the-adhesive-secretions-of-the-salamander-plethodon-shermani-caudata-plethodontidae
#13
Janek von Byern, Ingo Grunwald, Max Kosok, Ralph A Saporito, Ursula Dicke, Oliver Wetjen, Karsten Thiel, Kai Borcherding, Thomas Kowalik, Martina Marchetti-Deschmann
Salamanders have developed a wide variety of antipredator mechanisms, including tail autotomy, colour patterns, and noxious skin secretions. As an addition to these tactics, the red-legged salamander (Plethodon shermani) uses adhesive secretions as part of its defensive strategy. The high bonding strength, the fast-curing nature, and the composition of the biobased materials makes salamander adhesives interesting for practical applications in the medical sector. To understand the adhesive secretions of P. shermani, its components were chemically analysed by energy dispersive X-ray spectroscopy (EDX), inductively coupled plasma mass spectrometry (ICP-MS), amino acid analysis, and spectroscopy (ATR-IR, Raman)...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28750534/functionalization-free-microfluidic-electronic-tongue-based-on-a-single-response
#14
Flavio M Shimizu, Fagner R Todão, Angelo L Gobbi, Osvaldo N Oliveira, Carlos D Garcia, Renato S Lima
Electronic tongues (e-tongues) are promising analytical devices for a variety of applications to address the challenges of quality control in water monitoring and industries of foods, beverages, and pharmaceuticals. A crucial drawback in the current e-tongues is the need to recalibrate the device when one or more sensing units (usually with modified surface) are replaced. Another downside is the necessity to perform subsequent surface modifications and analyses to each of the diverse sensing units, undermining the simplicity and velocity of the method...
July 28, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28750527/novel-biomimic-crystalline-colloidal-array-for-fast-detection-of-trace-parathion
#15
Xihao Zhang, Yanguang Cui, Jialei Bai, Zhiyong Sun, Baoan Ning, Shuang Li, Jiang Wang, Yuan Peng, Zhixian Gao
A novel gold doped inverse opal photonic crystal (IO PC) was successfully fabricated with combination of molecularly imprinted technical for the fast determination of parathion. First, a closest silica array arrangement behaved as the 3D photonic crystal precursors to build the opal photonic crystal (O PC). Second, the parathion-containing polymeric solution with gold nanoparticles was drawn into the 3D array cracks. After polymerization, the well-designed O PC was treated with HF solution for the etching of the silica skeleton...
July 28, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28743310/the-effect-of-frequency-specific-sound-signals-on-the-germination-of-maize-seeds
#16
Carlos M Vicient
OBJECTIVE: The effects of sound treatments on the germination of maize seeds were determined. RESULTS: White noise and bass sounds (300 Hz) had a positive effect on the germination rate. Only 3 h treatment produced an increase of about 8%, and 5 h increased germination in about 10%. Fast-green staining shows that at least part of the effects of sound are due to a physical alteration in the integrity of the pericarp, increasing the porosity of the pericarp and facilitating oxygen availability and water and oxygen uptake...
July 25, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28743250/child-and-parent-perspectives-on-healthier-side-dishes-and-beverages-in-restaurant-kids-meals-results-from-a-national-survey-in-the-united-states
#17
Eleanor T Shonkoff, Stephanie Anzman-Frasca, Vanessa M Lynskey, Grace Chan, Meaghan E Glenn, Christina D Economos
BACKGROUND: Children frequently consume foods from restaurants; considering the quick-service sector alone, 1/3 of children eat food from these restaurants on a given day, and among these consumers, 1/3 of their daily calories come from fast food. Restaurant foods and beverages are second only to grocery store foods and beverages in their contribution to total energy intake of U.S. 4- to 11-year-olds. Shifting their restaurant consumption in healthier directions could have a positive impact on child health...
July 25, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28741595/3d-range-modulator-for-scanned-particle-therapy-development-monte-carlo-simulations-and-experimental-evaluation
#18
Yuri Simeonov, Uli Weber, Petar Penchev, Toke Printz Ringbæk, Christoph Schuy, Stephan Brons, Rita Engenhart-Cabillic, Jens Bliedtner, Klemens Zink
The purpose of this work was to design and manufacture a 3D range-modulator for scanned particle therapy. The modulator is intended to create a highly conformal dose distribution with only one fixed energy, simultaneously reducing considerably the treatment time. As a proof of concept, a 3D range-modulator was developed for a spherical target volume with a diameter of 5 cm, placed at a depth of 25 cm in a water phantom. It consists of a large number of thin pins with a well-defined shape and different lengths to modulate the necessary shift of the Bragg peak...
August 11, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28737409/low-buffer-capacity-and-alternating-motility-along-the-human-gastrointestinal-tract-implications-for-in-vivo-dissolution-and-absorption-of-ionizable-drugs
#19
Bart Hens, Yasuhiro Tsume, Marival Bermejo, Paulo Paixao, Mark J Koenigsknecht, Jason R Baker, William L Hasler, Robert Lionberger, Jianghong Fan, Joseph Dickens, Kerby Shedden, Bo Wen, Jeffrey Wysocki, Raimar Loebenberg, Allen Lee, Ann Frances, Greg Amidon, Alex Yu, Gail Benninghoff, Niloufar Salehi, Arjang Talattof, Duxin Sun, Gordon L Amidon
In this study, we determined the pH and buffer capacity of human gastrointestinal (GI) fluids (aspirated from the stomach, duodenum, proximal jejunum, and mid/distal jejunum) as a function of time, from 37 healthy subjects after oral administration of an 800 mg immediate-release tablet of ibuprofen (reference listed drug; RLD) under typical prescribed bioequivalence (BE) study protocol conditions in both fasted and fed states (simulated by ingestion of a liquid meal). Simultaneously, motility was continuously monitored using water-perfused manometry...
August 4, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28734706/emerging-minimally-invasive-treatment-options-for-male-lower-urinary-tract-symptoms
#20
REVIEW
Giuseppe Magistro, Christopher R Chapple, Mostafa Elhilali, Peter Gilling, Kevin T McVary, Claus G Roehrborn, Christian G Stief, Henry H Woo, Christian Gratzke
CONTEXT: Lower urinary tract symptoms (LUTS) are one of the most common and troublesome nonmalignant conditions affecting quality of life in aging men. A spectrum of established medical and surgical options is available to provide relief of bothersome LUTS. Both the adverse events of medication and the morbidity with surgical treatment modalities have to be counterbalanced against efficacy. Novel minimally invasive treatment options aim to be effective, ideally to be performed in an ambulatory setting under local anaesthesia and to offer a more favourable safety profile than existing reference techniques...
July 19, 2017: European Urology
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