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https://www.readbyqxmd.com/read/28449381/predicting-solubility-of-sulfur-a-cosmo-rs-based-approach-to-investigate-electrolytes-for-li-s-batteries
#1
Steffen Jeschke, Patrik Johansson
Lithium-sulfur (Li-S) batteries are in theory, from their basic reactions, very promising from a specific energy density point-of-view, but have bad power rate capabilities. The dissolution of sulfur from the C/S cathodes into the electrolyte is a rate determining and crucial step for the functionality. So far, time-consuming experimental methods, such as HPLC/UV, have been used to quantify the corresponding solubilities. Here, we use a computational fluid phase thermodynamics approach, the conductor-like screening model for real solvents (COSMO-RS), to compute the solubility of sulfur in different binary and ternary electrolytes...
April 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28449284/pediatric-melanoma
#2
REVIEW
Christina Stefanaki, Leonidas Chardalias, Efthymia Soura, Alexandra Katsarou, Alexander Stratigos
Pediatric melanoma, although rare, is the most common skin cancer in children. Our current knowledge on pediatric melanoma incidence trends is expanding, as several studies have addressed this issue with conflicting results. Known risk factors for pediatric melanoma include family history of melanoma, a previous history of malignancy, large congenital nevi, numerous melanocytic nevi, sunburns, increased UV exposure and a sun-sensitive phenotype. In younger children melanoma more often presents with atypical features, such as a changing, amelanotic or uniformly colored, often bleeding lesion, not fulfilling in most cases the conventional ABCDE criteria...
April 27, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28449224/validation-of-omi-uv-satellite-data-using-spectral-and-broadband-surface-based-measurements-at-a-queensland-site
#3
Mustapha A Jebar, Alfio V Parisi, Nathan J Downs, Joanna F Turner
This research reconstructed and validated the broadband UVA irradiances derived from discrete spectral irradiance data retrieved from the Ozone Monitoring Instrument (OMI) satellite from 1 January to 31 December 2009. OMI data at solar noon was compared to ground based spectral irradiances at Toowoomba (27°36' S 151°55' E), Australia at 310, 324 and 380 nm for both cloud free and all sky conditions. There was a strong relationship between the ground based UV spectroradiometer data and satellite based measurements with an R(2) of 0...
April 27, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28449221/assessment-of-sun-protective-attitudes-and-behaviours-of-australian-medical-students
#4
A J Scott, V Harris, A Lee, S D Smith
Skin cancer is a major public health concern in Australia and around the world, and UV radiation exposure is accepted as the most readily modifiable risk factor for the disease(1) . The attitudes and behaviours of young adults towards sun protection play an important role in their future risk of skin cancer, and are thus an important target for sun-safety messaging. A cross-sectional study aiming to investigate the sun-protective behaviours and attitudes of Australian medical students during both everyday outdoor activities and while travelling for leisure was conducted via an online questionnaire...
April 27, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28448912/effects-of-low-levels-of-ultraviolet-radiation-on-antioxidant-mechanisms-of-japanese-medaka-oryzias-latipes
#5
Wilson F Ramírez-Duarte, Tomofumi Kurobe, Swee J Teh
Extreme weather events like drought are expected to increase with climate change, which will increase exposure of freshwater fish to ultraviolet (UV) radiation. Compared to fully grown adult fish, fish in early life stages are more susceptible to UV radiation due to the lack of well-developed pigmentation. Even though several studies have described affectation of fish health after exposure to UV radiation, most of the studies have used intensities that are only found on the surface of the earth crust or at shallow depths in water bodies, and little is known about impacts of weaker UV radiation, which can be found in deep water...
April 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/28448901/tailoring-of-tio2-films-by-h2so4-treatment-and-uv-irradiation-to-improve-anticoagulant-ability-and-endothelial-cell-compatibility
#6
Yuzhen Liao, Linhua Li, Jiang Chen, Ping Yang, Ansha Zhao, Hong Sun, Nan Huang
Surfaces with dual functions that simultaneously exhibit good anticoagulant ability and endothelial cell (EC) compatibility are desirable for blood contact materials. However, these dual functions have rarely been achieved by inorganic materials. In this study, titanium dioxide (TiO2) films were treated by sulphuric acid (H2SO4) and ultraviolet (UV) irradiation successively (TiO2H2SO4-UV), resulting in good anticoagulant ability and EC compatibility simultaneously. We found that UV irradiation improved the anticoagulant ability of TiO2 films significantly while enhancing EC compatibility, though not significantly...
April 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28448885/development-and-validation-of-a-liquid-chromatographic-method-for-the-analysis-of-squaric-acid-dibutyl-ester-and-its-impurities
#7
Marwa F Mansour, Peixi Zhu, Ann Van Schepdael, Erwin Adams
A simple, fast and selective stability indicating liquid chromatographic method has been described for the simultaneous determination of squaric acid dibutyl ester and its impurities. The chromatographic separation was achieved on a C2 column (250mm×4.6mm i.d., 5μm) using a mobile phase consisting of 0.15% phosphoric acid - acetonitrile - methanol (30:60:10, v/v/v). Isocratic elution was performed at a flow rate of 1.0mLmin(-1). The analytes were detected by UV at 252nm. The method was validated according to the ICH guidelines and satisfactory results were obtained...
April 18, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28448877/synthesis-structure-and-cytotoxicity-of-a-series-of-dioxidomolybdenum-vi-complexes-featuring-salan-ligands
#8
Satabdi Roy, Monalisa Mohanty, Sagarika Pasayat, Sudarshana Majumder, Kulanthaivel Senthilguru, Indranil Banerjee, Martin Reichelt, Hans Reuter, Ekkehard Sinn, Rupam Dinda
Seven hexacoordinated cis-dioxidomolybdenum(VI) complexes [MoO2L(1-7)] (1-7) derived from various tetradentate diamino bis(phenolato) "salan" ligands, N,N'-dimethyl-N,N'-bis-(2-hydroxy-3-X-5-Y-6-Z-benzyl)-1,2-diaminoethane {(X=Br, Y=Me, Z=H (H2L(1)); X=Me, YCl, Z=H (H2L(2)); X=(i)Pr, Y=Cl, Z=Me (H2L(3))} and N,N'-bis-(2-hydroxy-3-X-5-Y-6-Z-benzyl)-1,2-diaminopropane {(X=Y=(t)Bu, Z=H (H2L(4)); X=Y=Me, Z=H (H2L(5)); X=(i)Pr, YCl, Z=Me (H2L(6)); X=Y=Br, Z=H (H2L(7))} containing O-N donor atoms, have been isolated and structurally characterized...
April 18, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28448832/fabrication-of-a-novel-z-scheme-g-c3n4-bi4o7-heterojunction-photocatalyst-with-enhanced-visible-light-driven-activity-toward-organic-pollutants
#9
Meng Sun, Yu Wang, Yu Shao, Yunhui He, Qi Zeng, Huikai Liang, Tao Yan, Bin Du
In this work, highly efficient g-C3N4/Bi4O7 heterojunction photocatalysts have been successfully fabricated by a facile method. Compared with the bare photocatalysts, the obtained g-C3N4/Bi4O7 hybrid photocatalysts exhibited efficient degradation activity toward methylene blue (MB), phenol, rhodamine B (RhB), and bisphenol A (BPA) under visible light irradiation. The influences of different g-C3N4 contents on the photocatalytic efficiency of the hybrid photocatalysts have been investigated. The results revealed that the g-C3N4/Bi4O7 with g-C3N4 mass ratio of 30% exhibited the best photocatalytic activity...
April 19, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28448750/simultaneous-atrazine-degradation-and-e-coli-inactivation-by-simulated-solar-photo-fenton-like-process-using-persulfate
#10
Natalya Garkusheva, Galina Matafonova, Irina Tsenter, Sara Beck, Valeriy Batoev, Karl Linden
This work evaluated the feasibility of a photo-Fenton-like process using persulfate (PS) and ferrous iron (Fe(2+)) under simulated solar radiation for degrading the herbicide atrazine (ATZ, 6-Chloro-N-ethyl-N'-isopropyl-1,3,5-triazine-2,4-diamine) and inactivating E. coli. Milli Q water, lake water, and diluted wastewater effluents were spiked both simultaneously and separately with ATZ (4 mg/L) and E. coli (10(5) CFU/mL), and exposed to treatment. A method for determining the average irradiance throughout the water media in the UV(A+B) range of the Xe lamp emission was developed for bench-scale experiments...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448742/choreography-of-parental-histones-in-damaged-chromatin
#11
Juliette Dabin, Sophie E Polo
In the cell nucleus, DNA repair machineries operate on a chromatin substrate, whose integrity is key for preserving cell functions and identity. Yet, it is still unclear how the epigenetic information conveyed by chromatin is maintained during the DNA repair process. We recently characterized the dynamics of parental histones coupled to UV-C damage repair in human cells, providing insights into how the pre-damage chromatin state may be restored. Here, we summarize our main findings and discuss them in the context of epigenome maintenance following DNA damage...
February 23, 2017: Nucleus
https://www.readbyqxmd.com/read/28448635/excited-state-dynamics-of-bis-dehydroxycurcumin-tert-butyl-ester-a-diketo-shifted-derivative-of-the-photosensitizer-curcumin
#12
Luca Nardo, Angelo Maspero, Andrea Penoni, Giovanni Palmisano, Erika Ferrari, Monica Saladini
Bis-dehydroxycurcumin tert-butyl ester (K2T23) is a derivative of the natural spice curcumin. Curcumin is widely studied for its multiple therapeutic properties, including photosensitized cytotoxicity. However, the full exploitation of curcumin phototoxic potential is hindered by the extreme instability of its excited state, caused by very efficient non radiative decay by means of transfer of the enolic proton to the nearby keto oxygen. K2T23 is designed to exhibit a tautomeric equilibrium shifted toward the diketo conformers with respect to natural curcumin...
2017: PloS One
https://www.readbyqxmd.com/read/28448436/role-of-archaeal-hera-protein-in-the-biology-of-the-bacterium-thermus-thermophilus
#13
Alba Blesa, Nieves G Quintans, Ignacio Baquedano, Carlos P Mata, José R Castón, José Berenguer
Intense gene flux between prokaryotes result in high percentage of archaeal genes in the genome of the thermophilic bacteria Thermus spp. Among these archaeal genes a homolog to the Sulfolobus spp. HerA protein appears in all of the Thermus spp. strains so far sequenced (HepA). The role of HepA in Thermus thermophilus HB27 has been analyzed using deletion mutants, and its structure resolved at low resolution by electron microscopy. Recombinant HepA shows DNA-dependent ATPase activity and its structure revealed a double ring, conically-shaped hexamer with an upper diameter of 150 Å and a bottom module of 95 Å...
April 27, 2017: Genes
https://www.readbyqxmd.com/read/28448169/decolorization-and-mineralization-of-amaranth-dye-using-multiple-zoned-aerobic-and-anaerobic-baffled-constructed-wetland
#14
Harvinder Kaur Lehl, Soon-An Ong, Li-Ngee Ho, Yee-Shian Wong, Farah Naemah Mohd Saad, Yoong-Ling Oon, Yoong-Sin Oon, Wei-Eng Thung, Chin-Yii Yong
The objective of this study is to determine the reduction efficiency of COD as well as the removal of color and Amaranth dye metabolites by the Aerobic-anaerobic Baffled Constructed Wetland Reactor (ABCW). The ABCW reactor was planted with common reed (Phragmite australis) where the HRT was set to 1 day and was fed with synthetic wastewater with the addition of Amaranth dye. Supplementary aeration was supplied in designated compartments of the ABCW reactor to control the aerobic and anaerobic zones. After Amaranth dye addition the COD reduction efficiency dropped from 98% to 91% while the color removal efficiency was 100%...
April 27, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28447907/nanotherapy-of-cancer-by-photoelectrons-emitted-from-the-surface-of-nanoparticles-exposed-to-nonionizing-ultraviolet-radiation
#15
Renat R Letfullin, Thomas F George
AIM: We introduce a new method for selectively destroying cancer cell organelles by electrons emitted from the surface of intracellularly localized nanoparticles exposed to the nonionizing ultraviolet (UV) radiation. METHODS: We propose to target cancerous intracellular organelles by nanoparticles and expose them to UV radiation with energy density safe for healthy tissue. RESULTS: We simulate the number of photoelectrons produced by the nanoparticles made of various metals and radii, calculate their kinetic energy and compare it to the threshold energy for producing biological damage...
April 27, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28447795/chemisorbed-and-physisorbed-water-at-the-tio2-water-interface
#16
Saman Hosseinpour, Fujie Tang, Fenglong Wang, Ruth Ackerman Livingstone, Simon J Schlegel, Tatsuhiko Ohto, Mischa Bonn, Yuki Nagata, Ellen H G Backus
The interfacial structure of water in contact with TiO2 is the key to understand the mechanism of photocatalytic water dissociation as well as photoinduced superhydrophilicity. We investigate the interfacial molecular structure of water at the surface of anatase TiO2, using phase sensitive sum frequency generation spectroscopy together with spectra simulation using ab-initio molecular dynamic trajectories. We identify two oppositely oriented, weakly and strongly hydrogen-bonded sub-ensembles of O-H groups at the superhydrophilic UV-irradiated TiO2 surface...
April 27, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28447784/dft-based-comparative-study-about-the-influence-of-fluorine-and-hydroxyl-anions-on-opto-electric-properties-of-borate-crystals-choice-for-better-anion
#17
Beenish Bashir, Bingbing Zhang, Ming-Hsien Lee, Shilie Pan, Zhihua Yang
Replacing hydroxyl anions OH¯ by fluorine anions F¯ in borates can cause the blue shift of the UV cutoff edge and also exhibits apparent differences in nonlinear optical (NLO) properties. To clarify the intrinsic difference between OH¯ anions and F¯ anions, several typical borates with different types of cations (p-cations with lone-pair electrons, trivalent rare-earth, and alkaline earth metals) have been studied. The theoretical studies reveal that the blue shift in the band gap of borates with fluorine as compared to those with hydroxyl can be assumed to be the result of weaker interaction of the cation-fluoride (La/Bi/B-F) bonds compared to that of the cation-oxygen and hydroxyl bonds...
April 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28447776/investigation-of-the-changes-in-electronic-properties-of-nickel-oxide-niox-due-to-uv-ozone-treatment
#18
Raisul Islam, Gang Chen, Pranav Ramesh, Junkyo Suh, Nobi Fuchigami, Donovan Lee, Karl A Littau, Kurt Weiner, Reuben T Collins, Krishna C Saraswat
Drastic reduction in nickel oxide (NiOx) film resistivity and ionization potential is observed when subjected to ultraviolet (UV)/ ozone (O3) treatment. X-ray photoemission spectroscopy suggests that UV/O3 treatment changes the film stoichiometry by introducing Ni vacancy defects. Oxygen-rich NiOx having Ni vacancy defects behaves as a p type semiconductor. Therefore, in this work, a simple and effective technique to introduce doping in NiOx is shown. Angle resolved XPS reveals that the effect of UV/O3 treatment does not only alter the film surface property, but also introduces oxygen-rich stoichiometry throughout the depth of the film...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28447693/modulating-the-electronic-structure-of-lanthanum-manganite-by-ruthenium-doping-for-enhanced-photocatalytic-water-oxidation
#19
Anindya Sundar Patra, Gaurangi Gogoi, Ranjan Kumar Sahu, Mohammad Qureshi
To the best of our knowledge this is the first report in which ruthenium doped polycrystalline lanthanum manganite, LaMn1-xRuxO3 (x = 0.0-0.4), having high efficacy for oxygen production from water without the use of any sacrificial reagent or co-catalyst and as an efficient photocatalyst for dye degradation is reported. Ruthenium doping alters the crystal structure of the parent LaMnO3 (LMO) due to the induced chemical pressure of the larger Ru(4+) ion, which facilitates a bond angle of 180° in the Mn(3+)-O-Mn(4+) plane resulting in the easy extraction of a photo-generated charge carrier population leading to enhanced photocatalytic activity...
April 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28447481/a-correction-method-for-attenuated-total-reflection-far-ultraviolet-spectra-via-the-use-of-charge-transfer-to-solvent-band-intensities-of-iodide-in-the-ultraviolet-region
#20
Akifumi Ikehata, Takeyoshi Goto, Yusuke Morisawa
Attenuated total reflection (ATR) spectra, which are often used in IR analysis, can be transformed into extinction and refraction spectra by Kramers-Kronig transformation (KKT) with Fresnel equations. However, it is often difficult to obtain correct optical indices due to the inherent instrumental functions. This paper proposes a simple practical method for correction of KKT with two parameters, which include all the effects of the instrumental function. In order to obtain the parameters of the instrumental function, absorption ratios of charge transfer to solvent (CTTS) transitions of aqueous iodide ions observed at 195 nm and 230 nm were used as a standard...
January 1, 2017: Applied Spectroscopy
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