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5.218 Aktuelle Fachpublikationen zum Thema temperature

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Understanding the photothermal heating effect in non-lamellar liquid crystalline systems, and the design of new mixed lipid systems for photothermal on-demand drug delivery

22.10.2014 | Wye-Khay Fong; Tracey L. Hanley; Benjamin Thierry; Adam Tilley; Nigel Kirby; Lynne J. Waddington; Ben J. Boyd, Physical Chemistry Chemical Physics, 2014

Lipid-based liquid crystalline systems are showing potential as stimuli-responsive nanomaterials, and NIR-responsive gold nanoparticles have been demonstrated to provide control of transitions in non-lamellar phases. In this study, we focus on a deeper understanding of the photothermal response ...

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Numerical modeling of multilayer film coextrusion with experimental validation

18.10.2014 | James Champion, M. Kieran Looney, Mark J.H. Simmons, Polymer Engineering and Science, 2014

Computational fluid dynamics (CFD) using a finite volume technique and the volume of fluid method of interface tracking is used to model the production of polyester‐based multilayered films via coextrusion. Experimental methods encompass both overall flow validation and secondary layer thickness ...

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Effects of an ionic liquid as an additive on the thermal denaturation/degradation of lysozyme crystals

17.10.2014 | Zhanzhong Wang, Wenzhi Fang, Lijie Li, Yan Li, Xiaoting Yu, Qing Gu, Fengjuan Zhou, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT Ionic liquids (ILs) have biomaterial applications and are used for protein crystallization. The present study explores the thermal denaturation and degradation kinetics of the lysozyme crystals induced by IL [C4mim]Cl using differential scanning calorimetry (DSC). Lysozyme crystals ...

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[Special Issue Report] Evidence of nonthermal particles in coronal loops heated impulsively by nanoflares

17.10.2014 | P. Testa; B. De Pontieu; J. Allred; M. Carlsson; F. Reale; A. Daw; V. Hansteen; J. Martinez-Sykora; W. Liu; E. E. De ..., Science , 2014

The physical processes causing energy exchange between the Sun’s hot corona and its cool lower atmosphere remain poorly understood. The chromosphere and transition region (TR) form an interface region between the surface and the corona that is highly sensitive to the coronal heating mechanism. ...

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[Special Issue Report] The unresolved fine structure resolved: IRIS observations of the solar transition region

17.10.2014 | V. Hansteen; B. De Pontieu; M. Carlsson; J. Lemen; A. Title; P. Boerner; N. Hurlburt; T. D. Tarbell; J. P. Wuelser; ..., Science , 2014

The heating of the outer solar atmospheric layers, i.e., the transition region and corona, to high temperatures is a long-standing problem in solar (and stellar) physics. Solutions have been hampered by an incomplete understanding of the magnetically controlled structure of these regions. The ...

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[Special Issue Report] On the prevalence of small-scale twist in the solar chromosphere and transition region

17.10.2014 | B. De Pontieu; L. Rouppe van der Voort; S. W. McIntosh; T. M. D. Pereira; M. Carlsson; V. Hansteen; H. Skogsrud; J. ..., Science , 2014

The solar chromosphere and transition region (TR) form an interface between the Sun’s surface and its hot outer atmosphere. There, most of the nonthermal energy that powers the solar atmosphere is transformed into heat, although the detailed mechanism remains elusive. High-resolution (0.33–arc ...

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Structural Changes of 6a-Hydroxy-Pterocarpans Upon Heating Modulate Their Estrogenicity

17.10.2014 | Milou G. M. van de Schans; Jean-Paul Vincken; Toine F. H. Bovee; Alfredo David Cervantes; Madelon J. Logtenberg; Har ..., Journal of Agricultural and Food Chemistry, 2014

The isoflavonoid composition of an ethanolic extract of fungus-treated soybean sprouts was strongly altered by a combined acid/heat treatment. UHPLC-MS analysis showed that 6a-hydroxy-pterocarpans were completely converted to their respective, more stable, 6a,11a-pterocarpenes, whereas other ...

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C60‐Mediated Molecular Shape Sorting: Separation and Purification of Geometrical Isomers

16.10.2014 | Moumita Rana, R. Bharathanatha Reddy, Bibhuti Bhusan Rath, Ujjal K. Gautam, Angewandte Chemie International Edition, 2014

Abstract A supramolecular crystallization‐based approach has been developed for the shape‐dependent separation of geometrical isomers under near‐ambient conditions. Difficulties to separate such isomers arise because of their very similar physical properties. The present approach relies on the ...

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Unexpected Fluorescence of Polyols and PEGylated Nanoparticles Derived from Carbon Dot Formation

16.10.2014 | Hailong Dong, Marcus Roming, Claus Feldmann, Particle & Particle Systems Characterization, 2014

Synthesis of nanoparticles in high‐boiling alcohols (so‐called polyol synthesis) and surface functionalization of nanoparticles with polyethylene glycol (so‐called PEGylation) in combination with certain heating are often accompanied with an intense fluorescence in the blue to green spectral ...

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Formation and Characterisation of the Silver Hydride Nanocluster Cation [Ag3H2((Ph2P)2CH2)]+ and Its Release of Hydrogen

16.10.2014 | Marion Girod, Marjan Krstić, Rodolphe Antoine, Luke MacAleese, Jérome Lemoine, Athanasios Zavras, George N. Khairall ..., Chemistry - A European Journal, 2014

Abstract Multistage mass spectrometry and density functional theory (DFT) were used to characterise the small silver hydride nanocluster, [Ag3H2L]+ (where L=(Ph2P)2CH2) and its gas‐phase unimolecular chemistry. Collision‐induced dissociation (CID) yields [Ag2HL]+ as the major product while ...

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