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https://www.readbyqxmd.com/read/28941414/synthesis-spectral-and-luminescence-study-crystal-structure-determination-and-dft-calculation-of-binuclear-palladium-ii-complexes
#1
S Seyfi, R Alizadeh, M Darvish Ganji, V Amani
Binuclear palladium(II) complexes with metal-metal (d(8)-d(8)) bonding interaction were synthesized by reactions of the 1-methyl-1H-1,2,3,4-tetrazole-5-thiol (Hmtzt) or a mixture of Hmtzt and 1,3-propanediamine (1,3-pda) ligands. Complex [Pd2(μ-mtzt)4]·2CH3CN (1) was synthesized by the reaction of Pd(OAc)2 with Hmtzt dissolved in acetonitrile and complex [Pd2(μ-mtzt)2(mtzt)2(1,3-pda)] (2) was synthesized by reaction of a mixture of Hmtzt and 1,3-propanediamine (dissolved in methanol) with PdCl2 (dissolved in acetonitrile) and were identified through elemental analysis, IR, UV-Vis, (1)H NMR, luminescence spectroscopy as well as single-crystal X-ray diffraction method...
September 14, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28941402/copper-ii-ions-interactions-in-the-systems-with-triamines-and-atp-potentiometric-and-spectroscopic-studies
#2
S K Hoffmann, J Goslar, R Bregier-Jarzebowska, A Gasowska, A Zalewska, L Lomozik
The mode of interaction and thermodynamic stability of complexes formed in binary and ternary Cu(II)/ATP/triamines systems were studied using potentiometric and spectroscopic (NMR, EPR, UV-Vis) methods. It was found that in binary metal-free systems ATP/HxPA species are formed (PA: Spd=spermidine or 3,3-tri=1,7-diamino-4-azaheptane) where the phosphate groups from nucleotides are preferred negative centers and protonated amine groups of amines are positive centers of reaction. In the ternary systems Cu/ATP/Hx(PA) as well as Cu/(ATP)(PA) species are formed...
September 9, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28941399/comparison-of-uv-led-and-low-pressure-uv-for-water-disinfection-photoreactivation-and-dark-repair-of-escherichia-coli
#3
Guo-Qiang Li, Wen-Long Wang, Zheng-Yang Huo, Yun Lu, Hong-Ying Hu
Studies on ultraviolet light-emitting diode (UV-LED) water disinfection have shown advantages, such as safety, flexible design, and lower starting voltages. However, information about reactivation after UV-LED disinfection is limited, which is an important issue of UV light-based technology. In this study, the photoreactivation and dark repair of Escherichia coli after UV-LEDs and low pressure (LP) UV disinfection were compared. Four UV-LED units, 265 nm, 280 nm, the combination of 265 + 280 (50%), and 265 + 280 (75%) were tested...
September 17, 2017: Water Research
https://www.readbyqxmd.com/read/28938765/advanced-oxidation-process-sanitization-of-hatching-eggs-reduces-salmonella-in-broiler-chicks
#4
A C Rehkopf, J A Byrd, C D Coufal, T Duong
The microbial quality of eggs entering the hatchery is an important critical control point for biosecurity, pathogen reduction, and food safety programs in poultry production. Developing interventions to reduce Salmonella contamination of eggs is important to improving the microbial food safety of poultry and poultry products. The hydrogen peroxide (H2O2) and ultraviolet light (UV) Advanced Oxidation Process (AOP) has been previously demonstrated to be effective in reducing Salmonella on the surface of experimentally contaminated eggs...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938214/dermal-transfer-and-environmental-release-of-ceo2-nanoparticles-used-as-uv-inhibitors-on-outdoor-surfaces-implications-for-human-and-environmental-health
#5
Justin G Clar, William E Platten, Eric J Baumann, Andrew Remsen, Steve M Harmon, Christina L Bennett-Stamper, Treye A Thomas, Todd P Luxton
A major area of growth for "nano-enabled" consumer products have been surface coatings, including paints stains and sealants. Ceria (CeO2) nanoparticles (NPs) are of interest as they have been used as additives in these these products to increase UV resistance. Currently, there is a lack of detailed information on the potential release, and speciation (i.e., ion vs. particle) of CeO2 NPs used in consumer-available surface coatings during intended use scenarios. In this study, both Micronized-Copper Azole pressure-treated lumber (MCA), and a commercially available composite decking were coated with CeO2 NPs dispersed in Milli-Q water or wood stain...
September 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28938203/green-synthesis-biological-and-spectroscopic-study-on-the-interaction-of-multi-component-mannich-bases-of-imidazo-2-1-b-benzothiazoles-with-human-serum-albumin
#6
Swetha K Maddili, Leela Prasad Yandrati, Shakuntala Siddam, Vijaya Kumar Kannekanti, Himabindu Gandham
A series of Mannich bases of imidazo[2, l-b]benzothiazoles were prepared through one-pot multi-component reaction in the presence of water as an eco-friendly solvent. All the synthesized compounds were confirmed from IR, (1)HNMR, (13)CNMR, and Mass spectroscopy. Evaluation of in vitro anti-inflammatory and anti-microbial activities of all the synthesized derivatives was further accomplished. These results clearly displayed that compound 6d exhibited outstanding anti-inflammatory activity with a percentage inhibition of 70...
August 19, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28938190/phytobeds-with-fimbristylis-dichotoma-and-ammannia-baccifera-for-treatment-of-real-textile-effluent-an-in-situ-treatment-anatomical-studies-and-toxicity-evaluation
#7
Suhas K Kadam, Vishal V Chandanshive, Niraj R Rane, Swapnil M Patil, Avinash R Gholave, Rahul V Khandare, Amrut R Bhosale, Byong-Hun Jeon, Sanjay P Govindwar
Fimbristylis dichotoma, Ammannia baccifera and their co-plantation consortium FA independently degraded Methyl Orange, simulated dye mixture and real textile effluent. Wild plants of F. dichotoma and A. baccifera with equal biomass showed 91% and 89% decolorization of Methyl Orange within 60h at a concentration of 50ppm, while 95% dye removal was achieved by consortium FA within 48h. Floating phyto-beds with co-plantation (F. dichotoma and A. baccifera) for the treatment of real textile effluent in a constructed wetland was observed to be more efficient and achieved 79%, 72%, 77%, 66% and 56% reductions in ADMI color value, COD, BOD, TDS and TSS of textile effluent, respectively...
September 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28938170/aromatic-hydrazones-derived-from-nicotinic-acid-hydrazide-as-fluorimetric-ph-sensing-molecules-structural-analysis-by-computational-and-spectroscopic-methods-in-solid-phase-and-in-solution
#8
T Benković, A Kenđel, J Parlov-Vuković, D Kontrec, V Chiş, S Miljanić, N Galić
Structural analyses of aroylhydrazones were performed by computational and spectroscopic methods (solid state NMR, 1 and 2D NMR spectroscopy, FT-IR (ATR) spectroscopy, Raman spectroscopy, UV-Vis spectrometry and spectrofluorimetry) in solid state and in solution. The studied compounds were N'-(2,3-dihydroxyphenylmethylidene)-3-pyridinecarbohydrazide (1), N'-(2,5-dihydroxyphenylmethylidene)-3-pyridinecarbohydrazide (2), N'-(3-chloro-2-hydroxy-phenylmethylidene)-3-pyridinecarbohydrazide (3), and N'-(2-hydroxy-4-methoxyphenyl-methylidene)-3-pyridinecarbohydrazide (4)...
September 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28938145/six-scalemic-mixtures-of-6-monosubstituted-dihydrobenzophenanthridine-alkaloids-from-chelidonium-majus-and-optically-active-structures-of-enantiomers
#9
An-Jun Deng, Hai-Jing Zhang, Qian Li, Zhi-Hong Li, Zhi-Hui Zhang, Lian-Qiu Wu, Li Li, Hai-Lin Qin
Six pairs of previously undescribed 6-monosubstituted dihydrobenzophenanthridine alkaloids were separated as corresponding six scalemic mixtures from the aerial part of Chelidonium majus. The elucidation for the 2D structures of these alkaloids was achieved using regular spectroscopic and chemical methods. The assignment of scalemic-mixture nature was achieved using combined examinations of their NMR data, CD spectra, calculation of specific rotations, and chiral HPLC profiles. The identification for the relative configurations of alkaloids possessing two asymmetric carbons directly connected up by a rotatable sp(3)-sp(3) carbon-carbon single bond was significantly facilitated by discussing the erythro and threo relative configurations defined by the mutuality of the orders of decreasing steric hindrances between the two sets of ligands linked to the two chiral centers...
September 19, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28938101/exposure-to-particulate-matter-air-pollution-and-risk-of-multiple-sclerosis-in-two-large-cohorts-of-us-nurses
#10
N Palacios, K L Munger, K C Fitzgerald, J E Hart, T Chitnis, A Ascherio, F Laden
BACKGROUND: Air pollution is thought to raise the risk of neurological disease by promoting neuroinflammation, oxidative stress, glial activation and cerebrovascular damage. Multiple Sclerosis is a common auto-immune disorder, primarily affecting young women. We conducted, to a large prospective study of particulate matter (PM) exposure and multiple sclerosis (MS) risk in two prospective cohorts of women: the Nurses Health Study (NHS) and the Nurses Health Study II (NHS II). METHODS: Cumulative average exposure to different size fractions of PM up to the onset of MS was estimated using spatio-temporal models...
September 19, 2017: Environment International
https://www.readbyqxmd.com/read/28938019/fabrication-of-3-methoxyphenol-sensor-based-on-fe3o4-decorated-carbon-nanotube-nanocomposites-for-environmental-safety-real-sample-analyses
#11
Mohammed M Rahman, Mohammad Musarraf Hussain, Abdullah M Asiri
Iron oxide ornamented carbon nanotube nanocomposites (Fe3O4.CNT NCs) were prepared by a wet-chemical process in basic means. The optical, morphological, and structural characterizations of Fe3O4.CNT NCs were performed using FTIR, UV/Vis., FESEM, TEM; XEDS, XPS, and XRD respectively. Flat GCE had been fabricated with a thin-layer of NCs using a coating binding agent. It was performed for the chemical sensor development by a dependable I-V technique. Among all interfering analytes, 3-methoxyphenol (3-MP) was selective towards the fabricated sensor...
2017: PloS One
https://www.readbyqxmd.com/read/28937967/acetogenins-and-alkaloids-during-the-initial-development-of-annona-muricata-l-annonaceae
#12
Christian Anabí Riley-Saldaña, María Del Rocío Cruz-Ortega, Mariano Martínez Vázquez, Iván De-la-Cruz-Chacón, Marisol Castro-Moreno, Alma Rosa González-Esquinca
In plants, the presence and distribution of specialized metabolites during the early stages of development are not documented enough, even though their biosynthesis is one of the most important strategies for survival. In this study, five alkaloids and four acetogenins were detected in Annona muricata L. during early development seedling, including three phases of root emergence and three of seedling formation. Hexane and alkaloid extracts were obtained from each organ, which were analyzed in a gas-mass chromatograph and in a high-performance liquid chromatograph coupled with a photodiode array UV detector (HPLC-DAD)...
September 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28937847/toxic-interaction-mechanism-of-two-fluoroquinolones-with-serum-albumin-by-spectroscopic-and-computational-methods
#13
Pengfei Qin, Xingren Pan, Rutao Liu, Changwei Hu, Yuliang Dong
To evaluate the toxicity of two fluoroquinolones (FQs), ciprofloxacin (CPFX), and enrofloxacin (ENFX), at the protein level, their binding modes with bovine serum albumin (BSA) were characterized by multiple spectroscopic and molecular docking methods under simulated physiological conditions. On the basis of fluorescence spectra, we concluded that both FQs greatly quenched the fluorescence intensity of BSA, which was attributed to the formation of a moderately strong complex mainly through electrostatic interactions...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937749/heterooctamolybdate-based-clusters-h3-cp-rh-4pmo8o32-and-h5-na2-cp-ir-4pmo8o34-and-derived-hybrid-nanomaterials-with-efficient-electrocatalytic-hydrogen-evolution-reaction-activity
#14
Vikram Singh, Pengtao Ma, Michael G B Drew, Jingyang Niu, Jingping Wang, Guo-Xin Jin
Polyoxometalates (POMs), emerging as a new class of porous molecular materials, play a promising role in homo- and heterogeneous catalysis. Among them, noble-metal-decorated POMs have a profound impact as catalytic materials. Thus, it is imperative to design and structurally explore new catalysts including noble metals. Herein, two new clusters, H3[(Cp*Rh)4PMo8O32]·14H2O (1) and H5[Na2(Cp*Ir)4PMo8O34]·13H2O (2) (Cp* = pentamethylcyclopentadienyl), based on a heterooctamolybdate anionic core were successfully obtained via a one-pot reaction using [Cp*MCl2]2 [M = Rh (1) and Ir (2)] and Na2MoO4 in acidic conditions...
September 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28937742/inorganic-nanoparticles-metal-organic-framework-hybrid-membrane-reactors-for-efficient-photocatalytic-conversion-of-co2
#15
James Wainaina Maina, Jurg Schutz, Luke Grundy, Elise Des Ligneris, Zhifeng Yi, Lingxue Kong, Cristina Pozo-Gonzalo, Mihail Ionescu, Ludovic F Dumée
Photocatalytic conversion of carbon dioxide (CO2) to useful products has potential to address the adverse environmental impact of global warming. However, most photocatalysts used to date exhibit limited catalytic performance, due to poor CO2 adsorption capacity, inability to efficiently generate photoexcited electrons, and/or poor transfer of the photo-generated electrons to CO2 molecules adsorbed on the catalyst surface. The integration of inorganic semiconductor nanoparticles across metal organic framework (MOF) materials has potential to yield new hybrid materials, combining high CO2 adsorption capacity of MOF and the ability of the semiconductor nanoparticles to generate photoexcited electrons...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937535/validation-of-a-commercial-assay-and-decision-support-tool-for-routine-paclitaxel-therapeutic-drug-monitoring-tdm
#16
Markus Joerger, Stefanie Kraff, Ulrich Jaehde, Ralf A Hilger, Jodi B Courtney, Daniel J Cline, Sonali Jog, Irina Baburina, M C Miller, Salvatore J Salamone
BACKGROUND: The value of therapeutic drug monitoring (TDM) for paclitaxel was recently demonstrated in the largest TDM trial ever conducted in oncology. The trial demonstrated significant reduction in neuropathy when using TDM. Dose adjustment for paclitaxel was based on time above a threshold concentration (Tc>0.05). Tc>0.05 must be calculated with a pharmacokinetic model and complex non-linear mixed effects (NLME) software. The use of the software and chromatographic methods to measure paclitaxel require specialized expertise...
September 18, 2017: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28937222/variable-lysozyme-transport-dynamics-on-oxidatively-functionalized-polystyrene-films
#17
Nicholas Anthony Moringo, Hao Shen, Lawrence J Tauzin, Wenxiao Wang, Logan D C Bishop, Christy F Landes
Tuning protein adsorption dynamics at polymeric interfaces is of great interest to many biomedical and material applications. Functionalization of polymer surfaces is a common method to introduce application specific surface chemistries to a polymer interface. In this work single molecule fluorescence microscopy is utilized to determine the adsorption dynamics of lysozyme, a well-studied antibacterial protein, at the interface of polystyrene oxidized via UV exposure, oxygen plasma, and functionalized by ligand grafting to produce varying degrees of surface hydrophilicity, surface roughness, and induced oxygen content...
September 22, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28937205/electrospun-p-type-nickel-oxide-semiconducting-nanowires-for-low-voltage-field-effect-transistors
#18
Ao Liu, You Meng, Huihui Zhu, Yong-Young Noh, Guoxia Liu, Fukai Shan
One-dimensional metal-oxide nanowires are regarded as important building blocks in nanoscale electronics due to their unique mechanical and electrical properties. In this work, p-type nickel oxide nanowires (NiO NWs) were fabricated by combining sol-gel and electrospinning processes. The polyvinylpyrrolidone (PVP) with 1,300,000 molecular weight was used as the polymer matrix to increase the viscosity of NiO precursor solution. The formation and properties of the as-spun NiO/PVP composite NWs before/after calcination treatment were investigated using various techniques...
September 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28937168/supracolloidal-chains-of-patchy-micelles-of-diblock-copolymers-with-in-situ-synthesized-nanoparticles
#19
Sukwoo Jang, Kyungtae Kim, Jonghyuk Jeon, Donghwi Kang, Byeong-Hyeok Sohn
Supracolloidal chains of diblock copolymer micelles were functionalized with gold and silver nanoparticles (NPs). Both NPs were independently synthesized in situ in the core of spherical micelles which were then converted to patchy micelles. With these patchy micelles as colloidal monomers, supracolloidal chains were polymerized by combining the patches of neighboring micelles. Since all micelles contained NPs, NPs were incorporated in every repeat unit of chains. In addition, a single gold NP was synthesized in the micellar core in contrast to several silver NPs so that we differentiated the chains with Au NPs from those with Ag NPs by the number of NPs in the repeat unit as well as by plasmonic bands in UV-Vis spectra...
September 22, 2017: Soft Matter
https://www.readbyqxmd.com/read/28937161/cold-sprayed-wo3-and-tio2-electrodes-for-photoelectrochemical-water-and-methanol-oxidation-in-renewable-energy-applications
#20
Christoph Haisch, Jenny Schneider, Manuel Fleisch, Henning Gutzmann, Thomas Klassen, Detlef W Bahnemann
Films prepared by cold spray have potential applications as photoanodes in electrochemical water splitting and waste water purification. In the present study cold sprayed photoelectrodes produced with WO3 (active under visible light illumination) and TiO2 (active under UV illumination) on titanium metal substrates were investigated as photoanodes for the oxidation of water and methanol, respectively. Methanol was chosen as organic model pollutant in acidic electrolytes. Main advantages of the cold sprayed photoelectrodes are the improved metal-semiconductor junctions and the superior mechanical stability...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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