keyword
MENU ▼
Read by QxMD icon Read
search

Fasting water

keyword
https://www.readbyqxmd.com/read/28812746/redox-titration-of-gold-and-platinum-surface-oxides-at-porous-microelectrodes
#1
Mareike Haensch, Julian Behnken, Luis Balboa, Alexander Dyck, Gunther Wittstock
The extension of the surface interrogation mode of scanning electrochemical microscopy (SI-SECM) is demonstrated for porous electrode materials. These materials are often high surface area powders which are very important electrocatalysts for instance in fuel cells or water electrolyzers. The powdered electrocatalyst material is filled into a cavity-microelectrode which is then operated as the sample electrode in SECM. After a surface oxide generation step, the oxides on the porous sample are reduced by [Ru(NH3)6](2+) formed at the microelectrode probe of the SECM while the sample is at open circuit potential...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28810226/rapid-removal-of-organic-pollutants-by-activation-sulfite-with-ferrate
#2
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/28810208/tungsten-doped-tio2-reduced-graphene-oxide-nano-composite-photocatalyst-for-degradation-of-phenol-a-system-to-reduce-surface%C3%A2-and-bulk-electron-hole-recombination
#3
Manisha Yadav, Asha Yadav, Rohan Fernandes, Yaksh Popat, Michele Orlandi, Alpa Dashora, D C Kothari, Antonio Miotello, B L Ahuja, Nainesh Patel
Recombination of photogenerated charges is the main factor affecting the photocatalytic activity of TiO2. Here, we report a combined strategy of suppressing both the bulk as well as the surface recombination processes by doping TiO2 with tungsten and forming a nanocomposite with reduced graphene oxide (rGO), respectively. Sol-gel method was used to dope and optimize the concentration of W in TiO2 powder. UV-Vis, XPS, PL and time resolved PL spectra along with DFT calculations indicate that W(6+) in TiO2 lattice creates an impurity level just below the conduction band of TiO2 to act as a trapping site of electrons, which causes to improve the lifetime of the photo-generated charges...
August 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28809537/confined-water-structure-dynamics-and-thermodynamics
#4
Sudip Chakraborty, Hemant Kumar, Chandan Dasgupta, Prabal K Maiti
Understanding the properties of strongly confined water is important for a variety of applications such as fast flow and desalination devices, voltage generation, flow sensing, and nanofluidics. Confined water also plays an important role in many biological processes such as flow through ion channels. Water in the bulk exhibits many unusual properties that arise primarily from the presence of a network of hydrogen bonds. Strong confinement in structures such as carbon nanotubes (CNTs) substantially modifies the structural, thermodynamic, and dynamic (both translational and orientational) properties of water by changing the structure of the hydrogen bond network...
August 15, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28807819/carrier-characteristics-influence-the-kinetics-of-passive-drug-loading-into-lipid-nanoemulsions
#5
Katrin Göke, Heike Bunjes
Passive loading as a novel screening approach is a material-saving tool for the efficient selection of a suitable colloidal lipid carrier system for poorly water soluble drug candidates. This method comprises incubation of preformed carrier systems with drug powder and subsequent determination of the resulting drug load of the carrier particles after removal of excess drug. For reliable routine use and to obtain meaningful loading results, information on the kinetics of the process is required. Passive loading proceeds via a dissolution-diffusion based mechanism, where drug surface area and drug water solubility are key parameters for fast passive loading...
August 11, 2017: European Journal of Pharmaceutics and Biopharmaceutics
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
#6
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/28807662/a-preliminary-study-of-osmotic-dehydration-in-zebrafish-embryos-implications-for-vitrification-and-ultra-fast-laser-warming
#7
Michelle H Connolly, Estefania Paredes, Peter Mazur
To date, traditional cryopreservation techniques have not been amenable to zebrafish (Danio rerio) embryos, due in part to their large yolky eggs, which have a low surface to volume ratio and limited permeability to water and cryoprotectants. However, recent vitrification and ultra-rapid warming studies in mice have demonstrated successful preservation by dehydrating 85% or more of their total water content. We hypothesized that this approach may help overcome the barriers to embryo cryopresrvation among D...
August 11, 2017: Cryobiology
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
#8
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/28806568/a-simple-high-performance-liquid-chromatography-mass-spectrometry-method-for-therapeutic-drug-monitoring-of-isavuconazole-and-four-other-antifungal-drugs-in-human-plasma-samples
#9
Giovanna Fatiguso, Fabio Favata, Ilaria Zedda, Amedeo De Nicolò, Jessica Cusato, Valeria Avataneo, Giovanni Di Perri, Antonio D'Avolio
Triazoles chanced the prevention and treatment of invasive fungal infections, but their pharmacokinetic properties are still unclear. In particular, isavuconazole (ISC) is a new broad-spectrum antifungal triazole approved in 2015 as first-line treatment for intravenous and oral use against invasive aspergillosis and for mucormycosis. Nowadays, the optimal management of the treatments with triazoles requires the use of Therapeutic Drug Monitoring (TDM), in order to prevent sub-therapeutic or toxic concentrations...
August 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28805531/fabrication-and-characterization-of-the-porous-duck-s-feet-collagen-sponge-for-wound-healing-applications
#10
Md Tipu Sultan, Ju Yeon Jeong, Ye Bin Seo, Ok Joo Lee, Hyung Woo Ju, Hyun Jung Park, Young Jin Lee, Ji Seung Lee, Soon Hee Kim, Chan Hum Park
There are several artificial dermis commonly use to cover the wound and promote healing. The major goal of wound management is fast and scarless healing. However, there is no ideal skin substitute, that is effective to accelerate wound healing without scar formation. Artificial dermis substitute also has some drawbacks, such as high cost, insufficient available period and donor pathogen infection. To overcome these problems, we developed duck's feet collagen (DFC) sponge as artificial dermal substitutes for the treatment of full-thickness skin defects...
August 14, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28805219/facile-synthesis-of-sponge-like-ni3n-nc-for-electrocatalytic-water-oxidation
#11
Mingxing Chen, Jing Qi, Dingyi Guo, Haitao Lei, Wei Zhang, Rui Cao
Sponge-like Ni3N/NC was prepared through a facile approach and was examined as a catalyst for the oxygen evolution reaction (OER). This material can efficiently catalyze water oxidation to reach a current density of 10 mA cm(-2) with a small overpotential of 310 mV in 1.0 M KOH aqueous solution. The high efficiency can be attributed to the good electronic conductivity, large specific surface area and fast mass diffusion ability of Ni3N/NC.
August 14, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28803207/phase-separation-of-in-situ-forming-poly-lactide-co-glycolide-acid-implants-investigated-using-a-hydrogel-based-subcutaneous-tissue-surrogate-and-uv-vis-imaging
#12
Yu Sun, Henrik Jensen, Nickolaj J Petersen, Susan W Larsen, Jesper Østergaard
Phase separation of in situ forming poly (lactide-co-glycolide acid) (PLGA) implants with agarose hydrogels as the provider of nonsolvent (water) mimicking subcutaneous tissue was investigated using a novel UV-vis imaging-based analytical platform. In situ forming implants of PLGA-1-methyl-2-pyrrolidinone and PLGA-triacetin representing fast and slow phase separating systems, respectively, were evaluated using this platform. Upon contact with the agarose hydrogel, the phase separation of the systems was followed by the study of changes in light transmission and absorbance as a function of time and position...
August 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28803071/responses-of-szarvasi-1-energy-grass-to-sewage-sludge-treatments-in-hydroponics
#13
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/28802186/a-l-type-lectin-gene-is-involved-in-the-response-to-hormonal-treatment-and-water-deficit-in-volkamer-lemon
#14
Dayse Drielly Sousa Santana Vieira, Giovanni Emiliani, Paola Bartolini, Alessandra Podda, Mauro Centritto, François Luro, Renata Del Carratore, Raphaël Morillon, Abelmon Gesteira, Biancaelena Maserti
Combination of biotic and abiotic stress is a major challenge for crop and fruit production. Thus, identification of genes involved in cross-response to abiotic and biotic stress is of great importance for breeding superior genotypes. Lectins are glycan-binding proteins with a functions in the developmental processes as well as in the response to biotic and abiotic stress. In this work, a lectin like gene, namely ClLectin1, was characterized in Volkamer lemon and its expression was studied in plants exposed to either water stress, hormonal elicitors (JA, SA, ABA) or wounding to understand whether this gene may have a function in the response to multiple stress combination...
August 1, 2017: Journal of Plant Physiology
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
#15
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/28801678/ultra-fast-hygrometer-based-on-u-shaped-optical-microfiber-with-nanoporous-polyelectrolyte-coating
#16
George Y Chen, Xuan Wu, Yvonne Qiongyue Kang, Li Yu, Tanya M Monro, David G Lancaster, Xiaokong Liu, Haolan Xu
Real-time measurement of the relative humidity of air has applications ranging from process control to safety. By using a microfiber form-factor, we demonstrate a miniature and fast-response hygrometer with the shortest-ever response time (3 ms). The sensor head consists of an optical microfiber of 10 µm diameter and 2 mm length configured to form a compact U-shaped probe, and functionalized with a polyelectrolyte multilayer coating of 1.0 bilayer. The sensing mechanism is primarily water-absorption-based optical loss...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801268/positron-emission-tomography-pet-guided-glioblastoma-targeting-by-a-fullerene-based-nanoplatform-with-fast-renal-clearance
#17
Yayun Peng, Dongzhi Yang, Weifei Lu, Xiongwei Hu, Hao Hong, Ting Cai
Various carbonaceous nanomaterials, including fullerene, carbon nanotube, graphene, and carbon dots, have attracted increasing attention during past decades for their potential applications in biological imaging and therapy. In this study, we have developed a fullerene-based tumor-targeted positron emission tomography (PET) imaging probe. Water-soluble functionalized C60 conjugates were radio-labeled with (64)Cu and modified with cyclo (Arg-Gly-Asp) peptides (cRGD) for targeting of integrin αvβ3 in glioblastoma...
August 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28801050/electron-transfer-through-arsenite-oxidase-insights-into-rieske-interaction-with-cytochrome-c
#18
Cameron Watson, Dimitri Niks, Russ Hille, Marta Vieira, Barbara Schoepp-Cothenet, Alexandra T Marques, Maria João Romão, Teresa Santos-Silva, Joanne M Santini
Arsenic is a widely distributed environmental toxin whose presence in drinking water poses a threat to >140 million people worldwide. The respiratory enzyme arsenite oxidase from various bacteria catalyses the oxidation of arsenite to arsenate and is being developed as a biosensor for arsenite. The arsenite oxidase from Rhizobium sp. str. NT-26 (a member of the Alphaproteobacteria) is a heterotetramer consisting of a large catalytic subunit (AioA), which contains a molybdenum centre and a 3Fe-4S cluster, and a small subunit (AioB) containing a Rieske 2Fe-2S cluster...
August 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28800433/global-gene-expression-analysis-of-the-muscle-tissues-of-medaka-acclimated-to-low-and-high-environmental-temperatures
#19
Daisuke Ikeda, Hiroki Koyama, Nanami Mizusawa, Nobuhiro Kan-No, Engkong Tan, Shuichi Asakawa, Shugo Watabe
Medaka (Oryzias latipes) is a temperate eurythermal fish that is able to survive over a wide range of water temperatures ranging from near zero to over 30°C throughout the year; it maintains its normal physiological and biochemical processes through temperature acclimation. To determine the mechanisms involved in temperature acclimation of fish, the fast skeletal muscle tissues of medaka underwent global gene expression analysis using next-generation sequencing. Ten individuals were placed into two aquariums at 24°C...
August 2, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28798856/fast-responsive-hydrogel-as-an-injectable-pump-for-rapid-on-demand-fluidic-flow-control
#20
Rongcong Luo, Ngoc-Duy Dinh, Chia-Hung Chen
Chemically synthesized functional hydrogels have been recognized as optimized soft pumps for on-demand fluidic regulation in micro-systems. However, the challenges regarding the slow responses of hydrogels have very much limited their application in effective fluidic flow control. In this study, a heterobifunctional crosslinker (4-hydroxybutyl acrylate)-enabled two-step hydrothermal phase separation process for preparing a highly porous hydrogel with fast response dynamics was investigated for the fabrication of novel microfluidic functional units, such as injectable valves and pumps...
May 2017: Biomicrofluidics
keyword
keyword
92099
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"