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Fabrication of Organic Light‐Emitting Devices Comprising Stacked Light‐Emitting Units by Solution‐Based Processes

12-12-2014 | Yong‐Jin Pu, Takayuki Chiba, Kazushige Ideta, Shogo Takahashi, Naoya Aizawa, Tatsuya Hikichi, Junji Kido, Advanced Materials, 2014

Multi‐organic light‐emitting devices comprising two light‐emitting units stacked in series through a charge‐generation layer are fabricated by solution processes. A zinc oxide nanoparticles/polyethylene­imine bilayer is used as the electron‐injection layer and phosphomolybdic acid is used as ...

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Polypropylene membranes with the double sensitivity effect

12-12-2014 | Joanna Wolska, Katarzyna Smolinska‐Kempisty, Marek Bryjak, Wojciech Kujawski, Journal of Applied Polymer Science, 2014

ABSTRACT This article describes the modification of polypropylene membranes leading to the preparation of thermo‐ and pH‐sensitive structures. Poly(N‐isopropylacrylamide), poly(acrylic acid), or copolymer poly(N‐isopropylacrylamide‐co‐acrylic acid) was grafted on to the membranes' surface ...

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Properties of aligned poly(L‐lactic acid) electrospun fibers

12-12-2014 | Bin Mao, Keifer Geers, Sophia Hu, Marlet Mancera, Myra Sandoval, Joshua Port, Yazhe Zhu, Peggy Cebe, Journal of Applied Polymer Science, 2014

ABSTRACT Poly(L‐lactic acid) (PLLA)‐aligned fibers with diameters in the nano‐ to micrometer size scale are successfully prepared using the electrospinning technique from two types of solutions, different material parameters and working conditions. The fiber quality is evaluated using scanning ...

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Strategic Design of Three-Dimensional (3D) Urchin-Like Pt–Ni Nanoalloys: How This Unique Nanostructure Boosts the Bulk Heterojunction Polymer Solar Cells Efficiency to 8.48%

12-12-2014 | Shang-Wei Chou; Hsieh-Chih Chen; Zhiyun Zhang; Wei-Hsuan Tseng; Chih-I Wu; Ya-Yun Yang; Ching-Yen Lin; Pi-Tai Chou, Chemistry of Materials, 2014

In this study, a simple and systematic shape-controlled synthetic protocol for tailoring nanoscale structures to generate large and monodispersed of three-dimensional (3D) urchin-like Pt–Ni multipods (MPs) and spherical nanoparticles (NPs) is reported, for which the mechanism of production is ...

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Structural and Biochemical Analysis of the Hordeum vulgare L. HvGR-RBP1 Protein, a Glycine-Rich RNA-Binding Protein Involved in the Regulation of Barley Plant Development and Stress Response

12-12-2014 | Brian P. Tripet; Katelyn E. Mason; Brian J. Eilers; Jennifer Burns; Paul Powell; Andreas M. Fischer; Valérie Copié, Biochemistry, 2014

The timing of whole-plant senescence influences important agricultural traits such as yield and grain protein content. Post-transcriptional regulation by plant RNA-binding proteins is essential for proper control of gene expression, development, and stress responses. Here, we report the ...

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Sulfono‐γ‐AApeptides as a New Class of Nonnatural Helical Foldamer

11-12-2014 | Haifan Wu, Qiao Qiao, Yaogang Hu, Peng Teng, Wenyang Gao, Xiaobing Zuo, Lukasz Wojtas, Randy W. Larsen, Shengqian Ma ..., Chemistry - A European Journal, 2014

Abstract Foldamers offer an attractive opportunity for the design of novel molecules that mimic the structures and functions of proteins and enzymes including biocatalysis and biomolecular recognition. Herein we report a new class of nonnatural helical sulfono‐γ‐AApeptide foldamers of varying ...

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Including Thermal Disorder of Hydrogen Bonding to Describe the Vibrational Circular Dichroism Spectrum of Zwitterionic l-Alanine in Water

11-12-2014 | Ednilsom Orestes; Carlos Bistafa; Roberto Rivelino; Sylvio Canuto, Journal of Physical Chemistry A, 2014

The vibrational circular dichroism (VCD) spectrum of l-alanine amino acid in aqueous solution in ambient conditions has been studied. The emphasis has been placed on the inclusion of the thermal disorder of the solute–solvent hydrogen bonds that characterize the aqueous solution condition. A ...

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Conformational preferences in the [small beta]-peptide oligomers of cis-2-amino-1-fluorocyclobutane-1-carboxylic acid

09-12-2014 | David J Aitken; Thomas Boddaert; Claire M Grison; Ammar Hassoun; Regis Guillot, New Journal of Chemistry, 2014

An efficient synthesis of cis-2-amino-1-fluorocyclobutane-1-carboxylic acid in single enantiomer form was established and protected homo-oligomers (2-, 4-, and 6-mers) of this cyclic cis-β-amino acid were prepared. Conformational analysis of these oligomers using IR, NMR and CD techniques in ...

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Preparation, purification, crystallization and preliminary crystallographic analysis of dual‐domain β‐propeller phytase from Bacillus sp. HJB17

08-12-2014 | Fang Lu, Gangxin Guo, Qianqian Li, Duo Feng, Yong Liu, Huoqing Huang, Peilong Yang, Wei Gao, Bin Yao, Acta Crystallographica Section F, 2014

β‐Propeller phytases (BPPs) are abundant in nature. Recently, dual‐domain BPPs have been found in which the typical BPP domain is responsible for phytate hydrolysis. The dual‐domain BPP (PhyH) from Bacillus sp. HJB17 was obtained with an incomplete N‐terminal BPP domain (PhyH‐DI; residues ...

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Synthesis, characterization, and performance evaluation of the AM/AMPS/DMDAAC/SSS quadripolymer as a fluid loss additive for water‐based drilling fluid

08-12-2014 | Xiaodong Bai, Yi Yang, Dingyuan Xiao, Xiaolin Pu, Xu Wang, Journal of Applied Polymer Science, 2014

ABSTRACT According to the molecular structure design requirements of the fluid loss additive resistant to high temperature, 2‐acrylamide‐2‐methyl propane sulfonic acid (AMPS), acrylamide (AM), dimethyl diallyl ammonium chloride (DMDAAC) and sodium styrene sulfonate (SSS) are selected as the ...

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