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Water‐soluble polymeric chemosensor for selective detection of Hg2+ in aqueous solution using rhodamine‐based modified poly(acrylamide–acrylic acid)

23-Mar-2015 | Tong‐Mou Geng, Da‐Yu Wu, Luminescence, 2015

Abstract We report the fabrication of a novel easily available turn‐on fluorescent water‐soluble polymeric chemosensor for Hg2+ ions that was simply prepared by micellar free radical polymerization of a water‐insoluble organic rhodamine‐based Hg2+‐recognizing monomer (GR6GH), with hydrophilic ...


Phototransformation mechanism of monuron induced by the triplet benzophenone in aqueous solution

18-Mar-2015 | Qiuxia Wu, Xuming Zheng, Kemei Pei, Journal of Physical Organic Chemistry, 2015

Phototransformation mechanism of monuron induced by the triplet benzophenone in aqueous solution was investigated by laser flash photolysis technique, while quenching of the triplet benzophenone by monuron was studied by nanosecond transient absorption spectroscopy. The transient species in the ...


New formula for calculating time to ignition of semi‐infinite solids

18-Mar-2015 | Ulf Wickström, Fire and Materials, 2015

Summary An analytical closed form formula is presented for explicitly calculating time to reach ignition temperature of semi‐infinite solids exposed to constant incident radiation and gas temperature as for example in the cone calorimeter. The non‐linear boundary condition due to the emitted ...


Different bacterial models for in vitro induction of non‐cavitated enamel caries‐like lesions: Microhardness and polarized light miscroscopy analyses

17-Mar-2015 | Priscila Hernández De Campos, Mariane Emi Sanabe, Jonas Almeida Rodrigues, Danilo Antonio Duarte, Maria Teresa Botti ..., Microscopy Research and Technique, 2015

ABSTRACT The aim of this study was to compare different bacterial models for in vitro induction of non‐cavitated enamel caries‐like lesions by microhardness and polarized light microscopy analyses. One hundred blocks of bovine enamel were randomly divided into four groups (n = 25) according to ...


Development of a sensitive, stable and EGFR‐specific molecular imaging agent for surface enhanced Raman spectroscopy

17-Mar-2015 | Leanne J. Lucas, Claudio Tellez, Maiara L. Castilho, Christopher L. D. Lee, Michael A. Hupman, Lais S. Vieira, Isabe ..., Journal of Raman Spectroscopy, 2015

We created and studied a novel nanoprobe for spectroscopic molecular imaging of the epidermal growth factor (EGF) receptor, whose over‐expression is a hallmark of a wide range of cancers. Silver nanoparticles (AgNPs) of 45 nm diameter were synthesized and coupled to EGF by α‐lipoic acid, a short ...


Understanding and tailoring the degradation of PVA‐tyramine hydrogels

16-Mar-2015 | Khoon S. Lim, Justine J. Roberts, Marie‐Helene Alves, Laura A. Poole‐Warren, Penny J. Martens, Journal of Applied Polymer Science, 2015

ABSTRACT We have previously reported on a hydrogel system fabricated from poly(vinyl alcohol) (PVA) functionalized with tyramine groups (PVA‐Tyr) that has the ability to co‐polymerize with proteins in their native state. These gels were also shown to be hydrolytically degradable through the ...


Thermal properties and degradation behavior of poly(1,4‐butylene adipate)/modified layered double hydroxide nanocomposites

13-Mar-2015 | Mei‐Chen Chu, Yi‐Tong Hang, Yi‐An Chen, Tzong‐Ming Wu, Journal of Applied Polymer Science, 2015

ABSTRACT In this study, poly(1,4‐butylene adipate) (PBA)/organomodified layered double hydroxide (m‐LDH) nanocomposites were synthesized and characterized as a new material for green materials use. m‐LDH was initially prepared with magnesium nitrate hexahydrate, aluminum nitrate‐9‐hydrate, ...


Electrospinning of gelatin fibers using solutions with low acetic acid concentration: Effect of solvent composition on both diameter of electrospun fibers and cytotoxicity

13-Mar-2015 | Marisa Erencia, Francisco Cano, Jose A. Tornero, Margarida M. Fernandes, Tzanko Tzanov, Jorge Macanás, Fernando Carrillo, Journal of Applied Polymer Science, 2015

ABSTRACT Gelatin fibers were prepared by electrospinning of gelatin/acetic acid/water ternary mixtures with the aim of studying the feasibility of fabricating gelatin nanofiber mats at room temperature using an alternative benign solvent by significantly reducing the acetic acid concentration. ...


Rheology and crystallization behavior of PLLA/TiO2‐g‐PDLA composites

13-Mar-2015 | Zhanxin Jing, Xuetao Shi, Guangcheng Zhang, Jiang Li, Polymers for Advanced Technologies, 2015

Poly(L‐lactide) (PLLA) composites with TiO2‐g‐poly(D‐lactide) (PDLA), which was synthesized by surface‐initiated opening ring polymerization with TiO2 as initiator and Sn(Oct)2 as catalyst, were prepared by solution casting. The synthesized TiO2‐g‐PDLA was characterized by transmission electron ...


Dividing a complex reaction involving a hypervalent iodine reagent into three limiting mechanisms by ab initio molecular dynamics

13-Mar-2015 | Oliver Sala, Hans Peter Lüthi, Antonio Togni, Marcella Iannuzzi, Jürg Hutter, Journal of Computational Chemistry, 2015

The electrophilic N‐trifluoromethylation of MeCN with a hypervalent iodine reagent to form a nitrilium ion, that is rapidly trapped by an azole nucleophile, is thought to occur via reductive elimination (RE). A recent study showed that, depending on the solvent representation, the SN2 is ...


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