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3.262 Aktuelle Fachpublikationen zum Thema temperature

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Investigation of membrane preparation condition effect on the PSD and porosity of the membranes using a novel image processing technique

13.09.2013 | Ashkan Zolfaghari Sharak, Armin Samimi, Seyyed Abbas Mousavi, Ramin Bozorgmehri Bozarjamhari, Journal of Applied Polymer Science, 2013

ABSTRACT A totally computerized image processing program package is developed to analyze the SEM images of membrane surface and cross‐section. Pore size distribution and porosity of the fabricated membranes are determined using the proposed image processing procedure. Furthermore, effect of ...

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Thermal response characteristics of fire blanket materials

12.09.2013 | Fumiaki Takahashi, Amber Abbott, Timothy M. Murray, James S. T'ien, Sandra L. Olson, Fire and Materials, 2013

SUMMARY The thermal response characteristics of over 50 relatively thin (0.15–3.7 mm) fire blanket materials from four different fiber groups (aramid, fiberglass, amorphous silica, and pre‐oxidized carbon) and their composites have been investigated. A plain or coated fabric sample was ...

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Metal–organic frameworks: a novel SERS substrate

11.09.2013 | Tsung‐Han Yu, Chin‐Hsian Ho, Cheng‐You Wu, Ching‐Hsuan Chien, Chia‐Her Lin, Szetsen Lee, Journal of Raman Spectroscopy, 2013

We report the direct observation of surface‐enhanced Raman scattering (SERS) effect using metal–organic frameworks (MOFs) as substrates. Without the aid of any metal colloids or enhancing agents, the SERS signals of methyl orange (MO) adsorbed in MOFs were observed and even remained active if ...

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Copper‐catalyzed highly efficient aerobic oxidative synthesis of benzimidazoles, benzoxazoles and benzothiazoles from aromatic alcohols under solvent‐free conditions in open air at room temperature

10.09.2013 | Jiatao Yu, Jian Xu, Ming Lu, Applied Organometallic Chemistry, 2013

Solvent‐free oxidative synthesis of benzimidazoles, benzoxazoles and benzothiazoles from aromatic alcohols and o‐phenylenediamine, o‐aminophenol and o‐aminothiophenol has been achieved by using CuCl, 2,2′‐bipyridine and TEMPO (2,2,6,6‐tetramethylpiperidine‐1‐oxyl). The reaction proceeds via a ...

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Experimental investigation and simulation of hollow fiber membrane process for SF6 recovery from GIS

10.09.2013 | Kee Hong Kim, Pravin G. Ingole, Jong Hak Kim, Hyung Keun Lee, Polymers for Advanced Technologies, 2013

In this present study, polyethersulfone hollow fiber membrane was used to recover sulfur hexafluoride (SF6) from gas‐insulated switchgear (GIS). SF6, N2 pure gas and mixed gas (12.5 vol.% of SF6) experiment was initiated to observe permeation behavior according to temperature and pressure ...

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Facile synthesis and catalytic activity of well‐defined amphiphilic block copolymers based on N‐vinylimidazolium

10.09.2013 | Chang Peng, Kai Huang, Mingsong Han, Wei Meng, Yuanqin Xiong, Weijian Xu, Polymers for Advanced Technologies, 2013

Well‐defined amphiphilic block copolymers, poly(styrene)‐b‐poly(N‐vinylimidazole) (PS‐b‐PVim), were successfully synthesized by macromolecular design via interchange of the xanthates/reversible addition–fragmentation chain transfer (RAFT) polymerization. The structure of the copolymer based on ...

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Micropatterned designs of thermoresponsive surfaces for modulating cell behaviors

10.09.2013 | Miaokun Yang, Ning Yang, Sixin Bi, Xiaoling He, Li Chen, Zhengyan Zhu, Yingtang Gao, Zhi Du, Polymers for Advanced Technologies, 2013

The chemistry and topography of the material surfaces have an important effect on cell behaviors. In this study, we reported the preparation of thermoresponsive micropatterned surfaces (TS) and galactosylated TS for modulating the adhesion/detachment of cells. A thickness of 1 µm of ...

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Acrylic bone cements: Effects of the poly(methyl methacrylate) powder size and chitosan addition on their properties

08.09.2013 | Tugba Endogan, Aysel Kiziltay, Gamze Torun Kose, Nil Comunoglu, Tahsin Beyzadeoglu, Nesrin Hasirci, Journal of Applied Polymer Science, 2013

ABSTRACT The effect of the particle size of poly(methyl methacrylate) (PMMA) and the incorporation of chitosan (CH) on the mechanical and thermal properties and the biocompatibility of acrylic bone cements were investigated. Three groups of bone cements were prepared with different PMMA ...

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Enantioseparation and Determination of the Chiral Fungicide Furametpyr Enantiomers in Rice, Soil, and Water by High‐Performance Liquid Chromatography

07.09.2013 | Fengshou Dong, Xiu Chen, Jun Xu, Xingang Liu, Zenglong Chen, Yuanbo Li, Hongjun Zhang, Yongquan Zheng, Chirality, 2013

ABSTRACT The chiral fungicide furametpyr is widely used in the rice field to control rice sheath blight; however, furametpyr enantiomers are treated as just one compound in traditional achiral analysis, which gives only partial information. An effective chiral analytical method was developed ...

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Embryonic development of chicken (Gallus Gallus Domesticus) from 1st to 19th day—ectodermal structures

06.09.2013 | Erika Toledo Fonseca, Fernanda Menezes De Oliveira Silva, Dayane Alcântara, Rafael Carvalho Cardoso, André Luís Fran ..., Microscopy Research and Technique, 2013

ABSTRACT Birds occupy a prominent place in the Brazilian economy not only in the poultry industry but also as an animal model in many areas of scientific research. Thus the aim of this study was to provide a description of macro and microscopic aspects of the ectoderm‐derived structures in ...

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