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https://www.readbyqxmd.com/read/28102334/cofe2o4-mil-100-fe-hybrid-magnetic-nanoparticles-exhibit-fast-and-selective-adsorption-of-arsenic-with-high-adsorption-capacity
#1
Ji-Chun Yang, Xue-Bo Yin
In this study, we report the synthesis and application of mesoporous CoFe2O4@MIL-100(Fe) hybrid magnetic nanoparticles (MNPs) for the simultaneous removal of inorganic arsenic (iAs). The hybrid adsorbent had a core-shell and mesoporous structure with an average diameter of 260 nm. The nanoscale size and mesoporous character impart a fast adsorption rate and high adsorption capacity for iAs. In total, 0.1 mg L(-1) As(V) and As(III) could be adsorbed within 2 min, and the maximum adsorption capacities were 114...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28101405/deep-tissue-photoacoustic-computed-tomography-with-a-fast-and-compact-laser-system
#2
Depeng Wang, Yuehang Wang, Weiran Wang, Dandan Luo, Upendra Chitgupi, Jumin Geng, Yang Zhou, Lidai Wang, Jonathan F Lovell, Jun Xia
Photoacoustic computed tomography (PACT) holds great promise for biomedical imaging, but wide-spread implementation is impeded by the bulkiness of flash-lamp-pumped laser systems, which typically weigh between 50 - 200 kg, require continuous water cooling, and operate at a low repetition rate. Here, we demonstrate that compact lasers based on emerging diode technologies are well-suited for preclinical and clinical PACT. The diode-pumped laser used in this study had a miniature footprint (13 × 14 × 7 cm(3)), weighed only 1...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28099164/investigation-of-time-resolved-proton-radiography-using-x-ray-flat-panel-imaging-system
#3
Kyung-Wook Jee, Rongxiao Zhang, El Bentefour, Paul Doolan, Ethan Cascio, Gregory Sharp, Jacob Flanz, Hsiao-Ming Lu
Proton beam therapy benefits from the Bragg peak and delivers highly conformal dose distributions. However, the location of the end-of-range is subject to uncertainties related to the accuracy of the relative proton stopping power estimates and thereby the water-equivalent path length (WEPL) along the beam. To remedy the range uncertainty, an in vivo measurement of the WEPL through the patient, i.e. a proton-range radiograph, is highly desirable. Towards that goal, we have explored a novel method of proton radiography based on the time-resolved dose measured by a flat panel imager (FPI)...
January 18, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28096662/synthetic-nanoparticles-of-bovine-serum-albumin-with-entrapped-salicylic-acid
#4
E S Bronze-Uhle, B C Costa, V F Ximenes, P N Lisboa-Filho
Bovine serum albumin (BSA) is highly water soluble and binds drugs or inorganic substances noncovalently for their effective delivery to various affected areas of the body. Due to the well-defined structure of the protein, containing charged amino acids, albumin nanoparticles (NPs) may allow electrostatic adsorption of negatively or positively charged molecules, such that substantial amounts of drug can be incorporated within the particle, due to different albumin-binding sites. During the synthesis procedure, pH changes significantly...
2017: Nanotechnology, Science and Applications
https://www.readbyqxmd.com/read/28094318/hydrogen-reduction-of-molybdenum-oxide-at-room-temperature
#5
Andreas Borgschulte, Olga Sambalova, Renaud Delmelle, Sandra Jenatsch, Roland Hany, Frank Nüesch
The color changes in chemo- and photochromic MoO3 used in sensors and in organic photovoltaic (OPV) cells can be traced back to intercalated hydrogen atoms stemming either from gaseous hydrogen dissociated at catalytic surfaces or from photocatalytically split water. In applications, the reversibility of the process is of utmost importance, and deterioration of the layer functionality due to side reactions is a critical challenge. Using the membrane approach for high-pressure XPS, we are able to follow the hydrogen reduction of MoO3 thin films using atomic hydrogen in a water free environment...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28092980/hydrogeochemical-and-isotope-study-of-perched-aquifers-in-the-cuvelai-etosha-basin-namibia
#6
Josefina T Hamutoko, Heike Wanke, Paul Koeniger, Matthias Beyer, Marcel Gaj
A hydrogeochemical and stable isotope study ((2)H and (18)O) was carried out in the Cuvelai-Etosha Basin in order to characterize available groundwater and to identify possible recharge mechanisms for the perched aquifers. Data were collected during seven field campaigns between 2013 and 2015 from a total of 24 shallow and deep groundwater hand-dug wells. In the investigated groundwaters, hydrogencarbonate is the dominating anion in both well types, whereas cations vary between calcium and magnesium in deep wells, and sodium and potassium in shallow wells...
January 16, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28092857/universal-efavirenz-determination-in-transport-study-rat-placenta-perfusion-and-placenta-lysate-by-hplc-uv
#7
Lucie Zelena, Josef Reznicek, Martina Ceckova, Hana Sklenarova
Efavirenz is an antiretroviral drug used in the treatment of HIV-positive patients. A simple, fast and sensitive high-performance liquid chromatography (HPLC) method was developed in order to determine efavirenz in three types of samples provided from pharmacokinetic studies. The analysis took 5min and was performed using a C18 analytical column (Discovery HS C18, 150×4.6mm, particle size of 5μm) in isocratic mode with a mobile phase containing acetonitrile and water (65:35, v/v), a flow rate of 1.6mLmin(-1), a sample volume of 10μL and UV detection at 245nm...
January 11, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28091849/dynamic-optical-absorption-characteristics-of-blood-after-slow-and-fast-heating
#8
Hao Jia, Bin Chen, Dong Li
Laser treatment is the most effective therapy in dermatology for vascular skin disorders, such as port-wine stains (PWS). Changes in heat-induced absorbance in blood must be determined for accurate numerical simulation and implementation of multi-pulse laser therapy for treatment of PWS. Thermally induced absorbance changes in hemoglobin in blood were compared in vitro between slow water bath heating and fast heating irradiated by using sub-millisecond Nd:YAG laser. Blood composition at different temperatures was calculated by comparing blood absorption spectra with those of pure HbO2, Hb, and metHb at room temperature...
January 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28091573/iron-oxide-films-prepared-by-rapid-thermal-processing-for-solar-energy-conversion
#9
B Wickman, A Bastos Fanta, A Burrows, A Hellman, J B Wagner, B Iandolo
Hematite is a promising and extensively investigated material for various photoelectrochemical (PEC) processes for energy conversion and storage, in particular for oxidation reactions. Thermal treatments during synthesis of hematite are found to affect the performance of hematite electrodes considerably. Herein, we present hematite thin films fabricated via one-step oxidation of Fe by rapid thermal processing (RTP). In particular, we investigate the effect of oxidation temperature on the PEC properties of hematite...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089828/nitrite-increases-glucose-stimulated-insulin-secretion-and-islet-insulin-content-in-obese-type-2-diabetic-male-rats
#10
Sevda Gheibi, Fatemeh Bakhtiarzadeh, Sajad Jeddi, Khadijeh Farrokhfall, Homeira Zardooz, Asghar Ghasemi
PURPOSE: Reduced bioavailability of nitric oxide (NO) is associated with pathogenesis of type 2 diabetes. Nitrite can act as a substrate for generation of systemic NO. The aim of this study was to examine the effects of nitrite administration on glucose-stimulated insulin secretion (GSIS) and islet insulin content in obese type 2 diabetic rats. METHODS: Male rats were divided into 4 groups: Control, control + nitrite, diabetes, and diabetes + nitrite. Sodium nitrite (50 mg/L in drinking water) was administered for 8 weeks...
January 9, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28088847/vapor-and-gas-bubble-growth-dynamics-around-laser-irradiated-water-immersed-plasmonic-nanoparticles
#11
Yuliang Wang, Mikhail E Zaytsev, Hai Le The, Jan Cornelis Titus Eijkel, Harold J W Zandvliet, Xuehua Zhang, Detlef Lohse
Microbubbles produced by exposing water-immersed metallic nanoparticles to resonant light play an important role in novel and efficient plasmonic-enhanced processes for catalytic conversion, solar energy harvesting, biomedical imaging technique or cancer therapy. How do these bubbles form and what is their gas composition? In this article, the growth dynamics of nucleating bubbles around laser irradiated water-immersed Au plasmonic nanoparticles are studied to determine the exact origin of the occurrence and growth of these bubbles...
January 16, 2017: ACS Nano
https://www.readbyqxmd.com/read/28088663/development-and-validation-of-a-sensitive-and-fast-uplc-ms-ms-method-for-simultaneous-determination-of-seven-bioactive-compounds-in-rat-plasma-after-oral-administration-of-guizhi-gancao-decoction
#12
Bin Ji, Limeng Zhuo, Bin Yang, Yang Wang, Lin Li, Miao Yu, Yunli Zhao, Zhiguo Yu
Rapid, sensitive, selective and accurate UPLC-MS/MS method was developed and fully validated for simultaneous determination of cinnamaldehyde, cinnamic acid, 2-methoxy cinnamic acid, glycyrrhizic acid, glycyrrhetinic acid, liquiritigenin and isoliquiritin in rat plasma after oral administration of Guizhi-gancao decoction. Plasma samples were processed with a simple protein precipitation technique using acetonitrile, followed by chromatographic separation using a Thermo Hypersil GOLD C18 column. A 11.0min linear gradient elution was used at a flow rate of 0...
January 9, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28081152/increased-serum-sodium-and-serum-osmolarity-are-independent-risk-factors-for-developing-chronic-kidney-disease-5-year-cohort-study
#13
Masanari Kuwabara, Ichiro Hisatome, Carlos A Roncal-Jimenez, Koichiro Niwa, Ana Andres-Hernando, Thomas Jensen, Petter Bjornstad, Tamara Milagres, Christina Cicerchi, Zhilin Song, Gabriela Garcia, Laura G Sánchez-Lozada, Minoru Ohno, Miguel A Lanaspa, Richard J Johnson
BACKGROUND: Epidemics of chronic kidney disease (CKD) not due to diabetes mellitus (DM) or hypertension have been observed among individuals working in hot environments in several areas of the world. Experimental models have documented that recurrent heat stress and water restriction can lead to CKD, and the mechanism may be mediated by hyperosmolarity that activates pathways (vasopressin, aldose reductase-fructokinase) that induce renal injury. Here we tested the hypothesis that elevated serum sodium, which reflects serum osmolality, may be an independent risk factor for the development of CKD...
2017: PloS One
https://www.readbyqxmd.com/read/28079959/removal-of-multiple-contaminants-from-water-by-polyoxometalate-supported-ionic-liquid-phases-pom-silps
#14
Sven Herrmann, Laura De Matteis, Jesús M de la Fuente, Scott G Mitchell, Carsten Streb
The simultaneous removal of organic, inorganic, and microbial contaminants from water by one material offers significant advantages when fast, facile, and robust water purification is required. Herein, we present a supported ionic liquid phase (SILP) composite where each component targets a specific type of water contaminant: a polyoxometalate-ionic liquid (POM-IL) is immobilized on porous silica, giving the heterogeneous SILP. The water-insoluble POM-IL is composed of antimicrobial alkylammonium cations and lacunary polyoxometalate anions with heavy-metal binding sites...
January 12, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28079198/oligomerization-of-fvflm-peptides-and-their-ability-to-inhibit-beta-amyloid-peptides-aggregation-consideration-as-a-possible-model
#15
M Kouza, A Banerji, A Kolinski, I A Buhimschi, A Kloczkowski
Preeclampsia, a pregnancy-specific disorder, shares typical pathophysiological features with protein misfolding disorders including Alzheimer's disease. Characteristic for preeclampsia is the involvement of multiple proteins of which fragments of SERPINA1 and β-amyloid co-aggregate in urine and placenta of preeclamptic women. To explore the biophysical basis of this interaction, we investigated the multidimensional efficacy of the FVFLM sequence in SERPINA1, as a model inhibitory agent of β-amyloid aggregation...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28079196/ultra-fast-charge-migration-competes-with-proton-transfer-in-the-early-chemistry-of-h2o%C3%AB
#16
Furong Wang, Uli Schmidhammer, Aurélien de La Lande, Mehran Mostafavi
Oxidation by the ultra-short lived radical cation of water, H2O˙(+), can potentially take place at the interface of water and numerous heterogeneous systems involved in radiation therapy, energy and environmental industries. The oxidation processes induced by H2O˙(+) can be mimicked in highly concentrated solutions where the nearest neighbors of H2O˙(+) may be molecules other than water. The reactivity of H2O˙(+) and D2O˙(+) is probed in hydrogenated and deuterated sulfuric acid solutions of various concentrations...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28077267/rapid-whole-brain-myelin-water-content-mapping-without-an-external-water-standard-at-1-5t
#17
Thanh D Nguyen, Pascal Spincemaille, Susan A Gauthier, Yi Wang
The objective of this study is to develop rapid whole brain mapping of myelin water content (MWC) at 1.5T. The Fast Acquisition with Spiral Trajectory and T2prep (FAST-T2) pulse sequence originally developed for myelin water fraction (MWF) mapping was modified to obtain fast mapping of T1 and receiver coil sensitivity needed for MWC computation. The accuracy of the proposed T1 mapping was evaluated by comparing with the standard IR-FSE method. Numerical simulations were performed to assess the accuracy and reliability of the proposed MWC mapping...
January 7, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28074743/synthesis-of-nanoporous-carbon-for-fast-uptake-of-cr-vi-and-ni-ii-from-aqueous-solution
#18
Imed Ghiloufi
Nanoporous carbon (NPC), based on organic xerogel compounds, was prepared at 650 ºC pyrolysis temperature by sol-gel method from pyrogallol and formaldehyde (PF-650) mixtures in water using picric acid as catalyst. The performance of NPC was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and nitrogen porosimetry. The metal uptake characteristics were explored using effective parameters including pH, contact time, initial metal ion concentration, and temperature...
January 10, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28074669/implementation-of-a-novel-ultra-fast-metabolic-stability-analysis-method-using-exact-mass-tof-ms
#19
Joseph D Manna, Samantha J Richardson, Mehran F Moghaddam
AIM: Increasing numbers of compounds requiring stability data means highly optimized methods capable of rapid turnaround are desirable during early discovery. Materials and methods/results: An advanced, generic analytical workflow for metabolic stability has been developed that utilizing ballistic gradient LC (sub 1 min run times), exact mass TOF-MS (Waters Xevo-G2-XS Q-TOF) and automated data processing (Waters UNIFI software) allowed for rapid integration and interpretation of all data produced, eliminating the need for method development and manual processing...
January 11, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28074609/rapid-chemical-shift-encoding-with-single-acquisition-single-slab-3d-grase
#20
Hahnsung Kim, Dong-Hyun Kim, Chul-Ho Sohn, Jaeseok Park
PURPOSE: To investigate the feasibility of chemical shift encoded, single-slab 3D GRASE for rapid fat-water separation within a single acquisition. METHODS: The proposed method incorporates signal-to-noise-ratio-optimal chemical shift encoding into single-slab 3D GRASE with variable flip angles. Chemical shift induced phase information was encoded in succession to different positions in k-space by inserting phase encoding blips between adjacent lobes of the oscillating readout gradients...
January 11, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
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