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https://www.readbyqxmd.com/read/29457781/efficient-synthesis-of-tungsten-oxide-hydrate-based-nanocomposites-for-applications-in-bifunctional-electrochromic-energy-storage-devices
#1
Xueting Chang, Ruirui Hu, Shibin Sun, Tong Lu, Tao Liu, Yanhua Lei, Lihua Dong, Yansheng Yin, Yanqiu Zhu
In this work, we realized the large-scale synthesis of WO3·H2O nanoflakes (NFs), g-C3N4/WO3·H2O nanocomposite (NC) and graphene (G)/WO3·H2O NC via a sonochemical process with tungsten salt as the precursor, g-C3N4 or G sheets as the supports, and distilled water as the solvent. Both the g-C3N4/WO3·H2O NC and the G/WO3·H2O NC exhibited much better EC performance (higher coloration efficiencies and faster response times) than that of the WO3·H2O NFs. Using the WO3·H2O-based materials as electrode materials, EC batteries that integrate the energy storage and EC functions in one device have been assembled...
February 19, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29457597/injectable-collagen-rgd-systems-for-bone-tissue-engineering-applications
#2
Fu-Chen Kung
Imbalance crosslink density and polymer concentration gradient is formed within the traditional alginate hydrogel using calcium chloride as a crosslinking agent in external gelation for instantaneously process. In this studying, type I collagen (Col I) blended calcium salt form of poly(γ-glutamic acid) (γCaPGA) was mixing with RGD-modified alginate with convenient gelation process and suitable for practical use. The hydrophilicity of the resulting hydrogels was evaluated through swelling tests, water retention capacity tests, and water vapor permeation tests...
2018: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/29457459/spontaneous-aerobic-oxidation-of-1-1-2-2-tetrakis-n-methylpyridin-4-ium-ethane-iodide-to-the-alkene-and-the-epoxide
#3
Nikolai A Tcyrulnikov, Anastasiia A Tikhomirova, Sergei Tcyrulnikov, R Marshall Wilson
The tetrapyridinium salt 1 was found to undergo quantitative air oxidation upon dissolving it in water. The corresponding alkene and the epoxide were found as the only products of the oxidation. A mechanism that involves an alkyl hydroperoxide intermediate 1″ undergoing a transformation that yields both products is proposed. Air oxidation of 1 shows the potential of the acceptor substituted alkanes to be used in the studies of mostly unknown direct epoxidation of single C-C bonds.
February 19, 2018: Organic Letters
https://www.readbyqxmd.com/read/29456267/inorganic-carbon-and-oxygen-dynamics-in-a-marsh-dominated-estuary
#4
Shiyu Rachel Wang, Daniela Di Iorio, Wei-Jun Cai, Charles S Hopkinson
We conducted a free-water mass balance-based study to address the rate of metabolism and net carbon exchange for the tidal wetland and estuarine portion of the coastal ocean and the uncertainties associated with this approach were assessed. We measured open water diurnal O2 and dissolved inorganic carbon (DIC) dynamics seasonally in a salt marsh-estuary in Georgia, U.S.A. with a focus on the marsh-estuary linkage associated with tidal flooding. We observed that the overall estuarine system was a net source of CO2 to the atmosphere and coastal ocean and a net sink for oceanic and atmospheric O2 ...
January 2018: Limnology and Oceanography
https://www.readbyqxmd.com/read/29454239/phenol-separation-from-phenol-laden-saline-wastewater-by-membrane-aromatic-recovery-system-like-membrane-contactor-using-superhydrophobic-organophilic-electrospun-pdms-pmma-membrane
#5
Long-Fei Ren, Mister Adeel, Jun Li, Cong Xu, Zheng Xu, Xiaofan Zhang, Jiahui Shao, Yiliang He
Phenol recovery from phenol-laden saline wastewater plays an important role in the waste reclamation and pollution control. A membrane aromatic recovery system-like membrane contactor (MARS-like membrane contactor) was set up in this study using electrospun polydimethylsiloxane/polymethyl methacrylate (PDMS/PMMA) membrane with 0.0048 m 2 effective area to separate phenol from saline wastewater. Phenol and water contact angles of 0° and 162° were achieved on this membrane surface simultaneously, indicating its potential in the separation of phenol and water-soluble salt...
February 10, 2018: Water Research
https://www.readbyqxmd.com/read/29451332/characterizing-the-effects-of-a-switchable-water-additive-on-the-aqueous-solubility-of-small-molecules
#6
Jesse R Vanderveen, Sarika Burra, Jialing Geng, Alexandre Goyon, Alexander Jardine, Hyejin E Shin, Tamer Andrea, Paul J Dyson, Philip G Jessop
"Switchable water" is an aqueous solution containing a water-soluble amine additive that exhibits CO 2 -switchable properties, such as large changes in ionic strength, by forming an ammonium bicarbonate salt. Switchable water has been used to reversibly "salt-out" organic compounds from water. This study explores the salting out of several compounds in switchable water when CO 2 is present and also explores the solubility of small molecules in switchable water, compared to pure water, when CO 2 is absent...
January 25, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29448020/an-anaerobic-membrane-bioreactor-membrane-distillation-hybrid-system-for-energy-recovery-and-water-reuse-removal-performance-of-organic-carbon-nutrients-and-trace-organic-contaminants
#7
Xiaoye Song, Wenhai Luo, James McDonald, Stuart J Khan, Faisal I Hai, William E Price, Long D Nghiem
In this study, a direct contact membrane distillation (MD) unit was integrated with an anaerobic membrane bioreactor (AnMBR) to simultaneously recover energy and produce high quality water for reuse from wastewater. Results show that AnMBR could produce 0.3-0.5L/g COD added biogas with a stable methane content of approximately 65%. By integrating MD with AnMBR, bulk organic matter and phosphate were almost completely removed. The removal of the 26 selected trace organic contaminants by AnMBR was compound specific, but the MD process could complement AnMBR removal, leading to an overall efficiency from 76% to complete removal by the integrated system...
February 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29447972/novel-asymmetric-chitosan-pvp-nanocellulose-wound-dressing-in-vitro-and-in-vivo-evaluation
#8
R Poonguzhali, S Khaleel Basha, V Sugantha Kumari
The present study was to develop a novel chitosan based symmetric and asymmetric bionanocomposite for potential wound dressing application. Chitosan (C)/Poly (vinyl pyrrolidone) (P)/nanocellulose (NC) membrane were fabricated by salt leaching method with the addition of 3% and 5% wt of nanocellulose. To obtain asymmetric material one side of the membrane was coated by stearic acid (S) which could form hydrophobic surface and another side acts as a hydrophilic surface. Nanocellulose of size 2-10 nm was synthesized and characterized by TEM analysis...
February 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29446685/inactivation-of-salmonella-and-surrogate-bacteria-on-cashews-and-macadamia-nuts-exposed-to-commercial-propylene-oxide-processing-conditions
#9
Thomas Saunders, Jian Wu, Robert C Williams, Haibo Huang, Monica A Ponder
Propylene oxide (PPO), a chemical fumigant, has been validated to reduce Salmonella on bulk almonds but has not been evaluated for other tree nuts. There is a need to identify nonpathogenic surrogate microorganisms whose inactivation is comparable to that of Salmonella to assure effective PPO processing parameters in different packaging configurations without introducing Salmonella into the pasteurization facility. The objective of this research was to compare the reduction of Salmonella and three potential surrogate bacterial strains, Enterococcus faecium ATCC 8459, Pediococcus acidilactici ATCC 8042, or Staphylococcus carnosus ATCC 51365, on cashews and macadamia nuts processed by using PPO...
February 15, 2018: Journal of Food Protection
https://www.readbyqxmd.com/read/29445901/geology-and-geochemistry-of-the-atacama-desert
#10
J Tapia, R González, B Townley, V Oliveros, F Álvarez, G Aguilar, A Menzies, M Calderón
The Atacama Desert, the driest of its kind on Earth, hosts a number of unique geological and geochemical features that make it unlike any other environment on the planet. Considering its location on the western border of South America, between 17 and 28 °S, its climate has been characterized as arid to hyperarid for at least the past 10 million years. Notably dry climatic conditions of the Atacama Desert have been related to uplift of the Andes and are believed to have played an important role in the development of the most distinctive features of this desert, including: (i) nitrates and iodine deposits in the Central Depression, (ii) secondary enrichment in porphyry copper deposits in the Precordillera, (iii) Li enrichment in salt flats of the Altiplano, and (iv) life in extreme habitats...
February 14, 2018: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/29445820/a-drastic-influence-of-the-anion-nature-and-concentration-on-high-pressure-intrusion-extrusion-of-electrolyte-solutions-in-silicalite-1
#11
A Ryzhikov, H Nouali, T J Daou, J Patarin
High pressure intrusion-extrusion of concentrated solutions of sodium salts in a pure-silica MFI-type zeolite (Silicalite-1) was studied for potential applications in mechanical energy absorption and storage. It was discovered that the anion nature has a drastic influence on the behavior and the energetic performances of "Silicalite-1 - concentrated Na + X - solution" systems, where X = Cl - , Br - , I - , NO 2 - , NO 3 - , ClO 4 - and CrO 4 2- . In the case of NaNO 2 , NaClO 4 , Na 2 CrO 4 , and NaI a combination of bumper and shock-absorber behaviors with a partial irreversible solution intrusion was observed, whereas a fully reversible spring behavior is demonstrated for the intrusion-extrusion of NaBr, NaCl and NaNO 3 solutions...
February 15, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29445161/anti-fouling-graphene-based-membranes-for-effective-water-desalination
#12
Dong Han Seo, Shafique Pineda, Yun Chul Woo, Ming Xie, Adrian T Murdock, Elisa Y M Ang, Yalong Jiao, Myoung Jun Park, Sung Il Lim, Malcolm Lawn, Fabricio Frizera Borghi, Zhao Jun Han, Stephen Gray, Graeme Millar, Aijun Du, Ho Kyong Shon, Teng Yong Ng, Kostya Ken Ostrikov
The inability of membranes to handle a wide spectrum of pollutants is an important unsolved problem for water treatment. Here we demonstrate water desalination via a membrane distillation process using a graphene membrane where water permeation is enabled by nanochannels of multilayer, mismatched, partially overlapping graphene grains. Graphene films derived from renewable oil exhibit significantly superior retention of water vapour flux and salt rejection rates, and a superior antifouling capability under a mixture of saline water containing contaminants such as oils and surfactants, compared to commercial distillation membranes...
February 14, 2018: Nature Communications
https://www.readbyqxmd.com/read/29442628/antibacterial-properties-enhancement-of-layer-by-layer-self-assembled-nanofiltration-membranes
#13
Zhonghua Huang, Mengkun Li, Na Li, Xinyuan Tang, Zhiyu Ouyang
Membrane technology is now being widely used in the field of water treatment for its unique advantages. Layer-by-layer (LbL) self-assembly technique is a convenient and versatile method of modified nanofiltration (NF) membranes fabrication, which can be used to control the thickness and the surface properties of membranes by chemical deposition of polyelectrolytes. Herein, a new kind of composite NF membrane with enhanced antibacterial properties was successfully fabricated through LbL self-assembly method, having polyether sulfone (PES) ultrafiltration (UF) membrane as support layer, N-[(2-hydroxy-3-trimethylammonium)propyl] chloride chitosan (HTCC) and polyacrylic acid (PAA) as active layer, and epichlorohydrin (ECH) as crosslinking reagent...
July 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29441817/return-to-surfing-using-an-adapted-prosthesis-a-case-report
#14
Erica Schvirtz, Laurent Bensoussan, Bertrand Tourret Couderc, Jean-Michel Viton, Alain Delarque, Marjorie Kerzoncuf
BACKGROUND: Surfing with transfemoral knee prosthesis requires flexion of the hip, knee, and ankle and balance between flexibility and stiffness of the prosthetic limb. We report on Mr D, a transfemoral amputee, who wanted to surf again. Case Description and Methods: Technical specifications were based on Mr D's complaint. The prosthesis is salt water resistant and combines a shock absorber associated with elastic tendons to permit the knee to bend easily and to facilitate eccentric braking...
February 1, 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29437394/physical-removal-of-anions-from-aqueous-media-by-means-of-a-macrocycle-containing-polymeric-network
#15
Xiaofan Ji, Ren-Tsung Wu, Lingliang Long, Chenxing Guo, Niveen M Khashab, Feihe Huang, Jonathan L Sessler
Reported here is a hydrogel-forming polymer network that contains a water-soluble tetracationic macrocycle. Upon immersion of this polymer network in aqueous solutions containing various inorganic and organic salts, changes in the physical properties are observed that are consistent with absorption of the constituent anions into the polymer network. This absorption is ascribed to host-guest interactions involving the tetracationic macrocyclic receptor. Removal of the anions may then be achieved by lifting the resulting hydrogels out of the aqueous phase...
February 19, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29436685/anti-angiogenic-and-pro-apoptotic-effects-of-a-small-molecule-jfd-ws-in-in-vitro-and-breast-cancer-xenograft-mouse-models
#16
Appu Rathinavelu, Thanigaivelan Kanagasabai, Sivanesan Dhandayuthapani, Khalid Alhazzani
A small molecule that was developed for blocking vascular endothelial growth factor receptor 2 (VEGFR2) has been tested and confirmed for its anti-angiogenic activity. Subsequently, it was modified into a water soluble salt form (JFD-WS) to increase bioavailability and distribution during in vivo pre-clinical testing. The present study was designed to further evaluate the anti-angiogenic and pro-apoptotic effects of JFD-WS in monotherapy as well as in combination with paclitaxel (Taxol) using a mouse xenograft model...
February 9, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29433210/delineation-of-salts-ripening-and-gentle-heating-effects-on-molecular-structure-of-cantal-type-cheese-by-mid-infrared-spectroscopy
#17
M Loudiyi, A Aït-Kaddour
In this study, five Cantal-type cheeses with different salts (NaCl and KCl) and two ripening times (5 and 15days) were analyzed for their physicochemical characteristics, their structure at a molecular level and their rheological properties during heating (20 to 60°C). The analysis of the molecular structure of cheeses was investigated by MIR spectroscopy coupled with ICA (Independent Components Analysis) and rheological properties by small-amplitude oscillatory rheology. ICA on physicochemical characteristics showed a good discrimination of the cheeses as a function of their chemical characteristics and ripening time...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29431704/brackish-water-desalination-using-electrodialysis-predictive-mass-transfer-and-concentration-distribution-model-along-the-electrodialyzer
#18
Azadeh Ghorbani, Abbas Ghassemi
This study employs theory and experimental data from a laboratory-scale electrodialyzer to predict sodium chloride (NaCl) mass transport and concentration distribution along the electrodialyzer as a function of feed concentration, feed flow rate, applied voltage, and pressure. Moreover, a model was developed to predict the ion removal as a function of driving forces through solving the complete Navier-Stokes, continuity, and steady state Nernst-Planck equations by the finite difference numerical method. The findings of the experiments confirmed that concentration distributions are nonlinear along both the dilute and concentrate compartments...
February 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29428711/2005-2014-trends-of-pm10-source-contributions-in-an-industrialized-area-of-southern-spain
#19
Jiwei Li, Bing Chen, Ana M Sánchez de la Campa, Andrés Alastuey, Xavier Querol, Jesus D de la Rosa
Particulate matter with a diameter of 10 μm or less (PM10) using receptor modelling was determined at an urban (La Linea, LL) and an industrial area (Puente Mayorga, PMY) in Southern Spain with samples collected during 2005-2014. The concentrations of PM10 had been decreasing at both sites in three distinctive periods: 1) the initial PM10 levels approached or exceeded the Spain and EU PM10 annual guidelines of 40 μg/m3 during 2005-2007 at LL and 2005-2009 at PMY; 2) then PM10 dropped by 25%-∼30 μg/m3 during 2008-2011 at LL and during 2010-2011 at PMY; 3) since 2012, the PM10 concentrations gradually decreased to <30 μg/m3...
February 8, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29428662/antihypertensive-and-antioxidant-effects-of-protocatechuic-acid-in-deoxycorticosterone-acetate-salt-hypertensive-rats
#20
Leila Safaeian, Reyhaneh Emami, Valiollah Hajhashemi, Zahra Haghighatian
Protocatechuic acid (PCA) is a natural antioxidant with beneficial cardiovascular properties. In this study, the effect of supplementation with PCA was investigated in deoxycorticosterone acetate (DOCA)-salt hypertension. Male Wistar rats received DOCA (25 mg/kg, s.c.) twice weekly and 1% NaCl in drinking water and simultaneously treated with PCA (50, 100 and 200 mg/kg, p.o.) for 4 weeks. Systolic blood pressure (SBP) was detected using tail-cuff method. Electrolytes including Na+, K+ and chloride, catalase activity, glutathione, total antioxidant capacity, malondialdehyde (MDA) and hydroperoxides concentration were measured in serum samples...
February 8, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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