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https://www.readbyqxmd.com/read/28809982/coordination-polymer-derived-nano-sized-zinc-ferrite-with-excellent-performance-in-nitro-explosive-detection
#1
Debal Kanti Singha, Partha Mahata
Herein, a mixed metal coordination polymer, {(H2pip)[Zn1/3Fe2/3(pydc-2,5)2(H2O)]·2H2O} 1 {where H2pip = piperazinediium and pydc-2,5 = pyridine-2,5-dicarboxylate}, was successfully synthesized using a hydrothermal technique. To confirm the structure and phase purity of 1, single crystals of an isomorphous pure Fe compound, {(H2pip)[Fe(pydc-2,5)2(H2O)]·2H2O} 1a, were synthesized based on similar synthetic conditions. Single crystal X-ray data of 1a confirmed the one-dimensional anionic metal-organic coordination polymer hydrogen bonded with protonated piprazine (piperazinediium) and lattice water molecules...
August 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28807691/size-optimization-and-in-vitro-biocompatibility-studies-of-chitosan-nanoparticles
#2
Thandapani Gomathi, P Supriya Prasad, P N Sudha, Sukumaran Anil
Chitosan (CS), an amino polysaccharide has fascinating scientific applications due to its many flexible properties. The advantages of Chitosan tend to increase when it was modified. Thus, in the present research work, to improve the properties of chitosan, it was converted into chitosan nanoparticles (CS-NPs) through the ionic gelation method using sodium tripoyphosphate (TPP) and sodium hexametaphosphate (SHMP) as a crosslinker. The size optimization was done by varying the parameters such as crosslinker concentration, agitation method and rate, agitation time, temperature and drying method...
August 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28806682/photolytic-insertion-of-albumin-on-activated-carbon-modified-with-ozone
#3
Regina de Fátima Peralta Muniz Moreira, Eduardo Humeres, Carolina Berger, M Isabel Fernández, J A Santaballa, Moisés Canle
254nm photolyses of bovine serum albumin [BSA] in aqueous solutions, were carried out in the presence of activated carbons modified by reaction with ozone. The photolyses were monitored by fluorescence spectroscopy and UV spectrophotometry, and the products were characterized by elemental analysis, FTIR, TGA, total organic carbon analyses [TOC], and XPS. The ozonation reaction was carried out at room temperature with O3 under dry and wet conditions. The carbon characterization showed that the reaction increased the amount of epoxide and carbonyl groups on the carbon matrix...
August 2, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28805503/the-effect-of-hydrolysis-on-combustion-characteristics-of-sewage-sludge-and-leaching-behavior-of-heavy-metals
#4
Mujahid Ali, Qunxing Huang, Bingcheng Lin, Binhang Hu, Wang Fei, Chi Yong
The aim of this paper is to present the effect of hydrolysis treatment on the thermal reaction characteristics of sludge and the leaching test of heavy metals contained in the sludge. Raw and hydrolysis treated sludge (at temperature of 200 °C and pressure 0.4MPa) samples were collected from local municipal sewage sludge treatment plant. Thermogravimetric analysis (TGA) was carried out between 25 to 900 °C at the heating rate of 10 and 20 °C/min under incineration and pyrolysis atmospheres. The leaching behavior of toxic heavy metals in the sludge was studied along with ash composition...
August 14, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28804851/thrombin-generation-assays-tgas
#5
Gian Luca Salvagno, Erik Berntorp
In recent years, there has been a revival of interest in a time-honored tool of the clotting trade: the thrombin generation curve or thrombin generation (TG) assay (TGA) as we now call it. Thrombin generation is a key coagulation process that determines the extent of a hemostatic plug or a thrombotic process. The recent development of newer tests based on the continuous registration of TG under in vitro conditions that mimic more closely what occurs in vivo prompted us to reinvestigate the balance between procoagulants and anticoagulants in patients...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28803476/rationally-turning-the-interface-activity-of-mesoporous-silicas-for-preparing-pickering-foam-and-dry-water
#6
Xia Rong, Hengquan Yang, Ning Zhao
We develop a novel protocol to prepare smart, gas/water interface-active, mesoporous silica particles. This protocol involves modification of highly mesoporous silicas with a mixture of hydrophobic octyl organosilane and hydrophilic triamine organosilane. Their structure and compositions are characterized by transmission electron microscopy (TEM), N2 sorption, solid state NMR, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FT-IR), Thermogravimetric analysis (TGA) and elemental analysis...
August 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28802246/preparation-and-adsorption-characteristics-of-an-ion-imprinted-polymer-for-fast-removal-of-ni-ii-ions-from-aqueous-solution
#7
Zhiyong Zhou, Delong Kong, Huiying Zhu, Nian Wang, Zhuo Wang, Qi Wang, Wei Liu, Qunsheng Li, Weidong Zhang, Zhongqi Ren
A novel Ni(II) ion-imprinted polymer (IIP) was synthesized by bulk polymerization for fast removal of Ni(II) ions from aqueous solution. Effects of preparation conditions on adsorption performance were investigated. Diphenylcarbazide (DPC) and N,N-azobisisobutyronitrile (AIBN) were used as ligand and initiator, respectively. Various monomers, solvents, cross-linking agents and molar ratios of template, monomer and cross-linking agent for polymerization were studied to obtain the largest adsorption capacity...
June 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28800109/effects-of-zno-nanoparticle-on-the-gas-separation-performance-of-polyurethane-mixed-matrix-membrane
#8
Banafsheh Soltani, Morteza Asghari
Polyurethane (PU)-ZnO mixed matrix membranes (MMM) were fabricated and characterized for gas separation. A thermogravimetric analysis (TGA), a scanning electron microscope (SEM) test and an atomic-force microscopy (AFM) revealed that the physical properties and thermal stability of the membranes were improved through filler loading. Hydrogen Bonding Index, obtained from the Fourier transform infrared spectroscopy (FTIR), demonstrate that the degree of phase separation in PU-ZnO 0.5 wt % MMM was more than the neat PU, while in PU-ZnO 1...
August 11, 2017: Membranes
https://www.readbyqxmd.com/read/28798377/peo-based-brush-type-amphiphilic-macro-raft-agents-and-their-assembled-polyhipe-monolithic-structures-for-applications-in-separation-science
#9
Aminreza Khodabandeh, R Dario Arrua, Fotouh R Mansour, Stuart C Thickett, Emily F Hilder
Polymerized High Internal Phase Emulsions (PolyHIPEs) were prepared using emulsion-templating, stabilized by an amphiphilic diblock copolymer prepared by reversible addition fragmentation chain transfer (RAFT) polymerization. The diblock copolymer consisted of a hydrophilic poly(ethylene glycol) methyl ether acrylate (PEO MA, average Mn 480) segment and a hydrophobic styrene segment, with a trithiocarbonate end-group. These diblock copolymers were the sole emulsifiers used in stabilizing "inverse" (oil-in-water) high internal phase emulsion templates, which upon polymerization resulted in a polyHIPE exhibiting a highly interconnected monolithic structure...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28797969/bioactive-mesoporous-silica-nanostructures-with-anti-microbial-and-anti-biofilm-properties
#10
Paul Cătălin Balaure, Bianca Boarca, Roxana Cristina Popescu, Diana Savu, Roxana Trusca, Bogdan Ștefan Vasile, Alexandru Mihai Grumezescu, Alina Maria Holban, Alexandra Bolocan, Ecaterina Andronescu
The increasing rate of antibiotic resistant bacteria associated with nosocomial infections in severely ill patients has urged the need for new antibacterial therapies. Nanostructured materials represent emerging innovative approaches to controlled delivery of different antimicrobial drugs. Delivery systems encapsulating natural compounds with antibacterial effects, such as essential oils have shown a great potential. Herein we report the development of SiO2 mesoporous nanosystems loaded with eucalyptus (EUC), orange (ORA), and cinnamon (CIN) essential oils...
August 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28797817/biodegradable-poly-lactic-acid-cellulose-nanocrystals-cncs-composite-microcellular-foam-effect-of-nanofillers-on-foam-cellular-morphology-thermal-and-wettability-behavior
#11
Shasanka Sekhar Borkotoky, Prodyut Dhar, Vimal Katiyar
This article addresses the elegant and green approach for fabrication of bio-based poly (lactic acid) (PLA)/cellulose nanocrystal (CNCs) bionanocomposite foam (PLA/CNC) with cellular morphology and hydrophobic surface behavior. Highly porous (porosity >80%) structure is obtained with interconnected pores and the effect of CNCs in the cell density (Nf) and cell size of foams are thoroughly investigated by morphological analysis. The thermo-mechanical investigations are performed for the foam samples and almost ∼1...
August 7, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28797146/qualitative-and-quantitative-characterisation-of-adsorption-mechanisms-of-lead-on-four-biochars
#12
Zhengtao Shen, Yiyun Zhang, Fei Jin, Oliver McMillan, Abir Al-Tabbaa
The adsorption mechanisms of lead (Pb(2+)) on four biochars (SB produced from British hardwood at 600°C and three standard biochars produced from wheat straw pellets at 700°C (WSP700), rice husk at 700°C (RH700) and soft wood pellets at 550°C (SWP550)) were characterised qualitatively and quantitatively, using a combination of chemical and micro-structural methods. Sequential extraction test results show that Pb(2+) was predominantly adsorbed on SB (85.31%), WSP700 (75.61%) and RH700 (85.76%) as acidic soluble fraction, which was potentially bioavailable if applied in soil...
August 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28796484/superhydrophobic-superoleophilic-and-reinforced-ethyl-cellulose-sponges-for-oil-water-separation-synergistic-strategies-of-cross-linking-carbon-nanotube-composite-and-nanosilica-modification
#13
Yeqiang Lu, Weizhong Yuan
Superhydrophobic/superoleophilic and reinforced ethyl cellulose (SEC) sponges were prepared by cross-linking EC with epichlorohydrin (ECH) and complexing with silanized carbon nanotubes (Si-CNTs) followed by coating nanosilica on the surface of porous sponges and subsequent modification with hexadecyltrimethoxysilane (HDTMS). These synergistic strategies endowed the SEC sponges with the superhydrophobic/superoleophilic properties (θwater=158.2°, θoil=0°, sliding angle=3°) and outstanding mechanical properties (could bear the pressure of 28...
August 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28796423/direct-carbonation-of-glycerol-with-co2-catalyzed-by-metal-oxides
#14
Claudio J A Mota, Leonardo Ozório
Five metal oxides (ZnO, SnO2, Fe2O3, CeO2, La2O3) were produced by the sol-gel method and tested in the direct carbonation of glycerol with CO2. Initial tests with Fe2O3 showed that the best reaction condition was 180 °C, 150 bar and 12 h. The other oxides were evaluated at these conditions and were all active to the formation of glycerol carbonate. Zinc oxide was the most active catalyst, with a yield of 8.1% in the organic carbonate. The catalytic activity decreased upon washing and drying the ZnO catalyst between the runs...
August 10, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28792747/the-effect-of-water-on-rheology-of-native-cellulose-ionic-liquids-solutions
#15
Behzad Nazari, Nyalaliska Utomo, Ralph H Colby
Cellulose coagulates upon adding water to its solutions in ionic liquids. Although cellulose remains in solution with much higher water contents, here we report the effect of 0-3 wt.% water on solution rheology of cellulose in 1-butyl-3-methylimidazolium chloride (BMImCl) and 1-ethyl-3-methylimidazolium acetate (EMImAc). Fourier transform infrared (FTIR) spectroscopy, thermal gravimetric analysis (TGA), and polarized light microscopy were also used to study water absorbance to the solutions. Tiny amounts of water (0...
August 9, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28791210/biosynthesis-of-mgo-nanoparticles-using-mushroom-extract-effect-on-peanut-arachis-hypogaea-l-seed-germination
#16
K Jhansi, N Jayarambabu, K Paul Reddy, N Manohar Reddy, R Padma Suvarna, K Venkateswara Rao, V Ramesh Kumar, V Rajendar
Current study describes the green, environmental friendly, and cost-effectiveness technique for the preparation of MgO nanoparticles (NPs) via white button mushroom aqueous extract. The synthesized MgO NPs were characterized using equipments such as X-ray diffraction, dynamic light scattering (DLS), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and thermal gravimetric analysis (TGA) for average crystalline size, particle size, morphology, elemental analysis, and weight loss of the materials, respectively...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28780456/synthesis-single-crystal-dna-interaction-spectrophotometric-and-spectroscopic-characterization-of-the-hydrogen-bonded-charge-transfer-complex-of-2-aminopyrimidine-with-%C3%AF-acceptor-chloranilic-acid-at-different-temperature-in-acetonitrile
#17
Zulkarnain, Lal Miyan, Afaq Ahmad, Md Fazle Alam, Hina Younus
The charge transfer (CT) interaction of 2-aminopyrimidine (AP) with chloranilic acid (CLA) as π-acceptor was investigated spectrophotometrically in acetonitrile at different temperatures in the range of 25-50°C. The 1:1 stoichiometry of the synthesized CT complex was detected using straight line method. Benesi-Hildebrand equation was used to determine the association constant (KCT), molar extinction coefficient (ε) and other physical parameters. Various thermodynamics parameters such as enthalpy (ΔH), entropy (ΔS) and free energy (ΔG) were determined using UV-Visible spectrophotometry in acetonitrile at different temperatures...
July 4, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28780338/facile-functionalization-of-cotton-with-nanostructured-silver-titania-for-visible-light-plasmonic-photocatalysis
#18
Marwa Abid, Soraa Bouattour, Ana M Ferraria, David S Conceição, Ana P Carapeto, Luís F Vieira Ferreira, Ana M Botelho do Rego, Mohamed M Chehimi, Manuel Rei Vilar, Sami Boufi
In the present work, a simple, reliable and cost-effective approach to functionalize cotton fabrics with Ag-TiO2 nanoparticles strongly bound to the fibres and with visible-light-responsive photo-activity is presented. The hybrid cotton-Ag-TiO2 fabrics were characterized by Raman, AFM, FE-SEM, TGA, XPS GSDR, and LIL to confirm the generation of metallic Ag nanoparticles and crystalline TiO2 and investigate how the concentration of Ag and TiO2 precursors affected the morphology and the luminescence properties of the nanostructured layer grafted on the cotton fibres...
July 29, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28780270/development-of-natural-cellulase-inhibitor-mediated-intensified-biological-pretreatment-technology-using-pleurotus-florida-for-maximum-recovery-of-cellulose-from-paddy-straw-under-solid-state-condition
#19
Manickam Naresh Kumar, Rajarathinam Ravikumar, Senniyappan Thenmozhi, Muthuvelu Kirupa Sankar
Inhibitor mediated intensified bio-pretreatment (IMBP) technology using natural cellulase inhibitor (NCI) for maximum cellulose recovery from paddy straw was studied. Pretreatment was carried out under solid state condition. Supplementation of 8% NCI in pretreatment medium improves cellulose recovery and delignification by 1.2 and 1.5-fold respectively, compared to conventional bio-pretreatment due to inhibition of 61% of cellulase activity in IMBP. Further increase in NCI concentration showed negative effect on Pleurotus florida growth and suppress the laccase productivity by 1...
July 22, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28780267/coproduction-of-lignin-and-glucose-from-vine-shoots-by-eco-friendly-strategies-toward-the-development-of-an-integrated-biorefinery
#20
Izaskun Dávila, Patricia Gullón, María A Andrés, Jalel Labidi
The objective of this work was to study the suitability of the pretreated vine shoots as a source of lignin and to determine its structural features. The best conditions to achieve the aim of this work were 12% NaOH, 124°C and 105min, as they permitted a removal of 67.7% of the lignin present in the pretreated vine shoots and the obtaining of a solid with a 69.4% of glucan. This delignified solid was subjected to an enzymatic hydrolysis achieving a conversion of glucan to glucose close to 100%. The characterization of lignins extracted from pretreated vine shoots was carried out for the first time and the following techniques were employed: a quantitative acid hydrolysis, HPSEC, TGA, FTIR and Pyrolysis-GC/MS...
July 21, 2017: Bioresource Technology
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