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807 Aktuelle Fachpublikationen zum Thema temperature

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van der Waals Interactions on the Mesoscale: Open-Science Implementation, Anisotropy, Retardation, and Solvent Effects

09.04.2015 | Daniel M. Dryden; Jaime C. Hopkins; Lin K. Denoyer; Lokendra Poudel; Nicole F. Steinmetz; Wai-Yim Ching; Rudolf Podg ..., Langmuir, 2015

The self-assembly of heterogeneous mesoscale systems is mediated by long-range interactions, including van der Waals forces. Diverse mesoscale architectures, built of optically and morphologically anisotropic elements such as DNA, collagen, single-walled carbon nanotubes, and inorganic materials, ...

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Effects of Cholesterol and Saturated Sphingolipids on Acyl Chain Order in 1-Palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine Bilayers—A Comparative Study with Phase-Selective Fluorophores

02.04.2015 | Oskar Engberg; Henrik Nurmi; Thomas K.M. Nyholm; J.Peter Slotte, Langmuir, 2015

Saturated sphingolipids have high acyl chain order. Our aim was to study how palmitoylated sphingomyelin (PSM), ceramide (PCer), glucosyl (GlcPCer)-, and galactosylceramide (GalPCer) were able to order the bulk acyl chains of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), in comparison ...

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Nonspherical Nanoparticles with Controlled Morphologies via Seeded Surface-Initiated Single Electron Transfer Radical Polymerization in Soap-Free Emulsion

30.03.2015 | Jinfeng Yuan; Lixia Wang; Lei Zhu; Mingwang Pan; Wenjie Wang; Ying Liu; Gang Liu, Langmuir, 2015

This work reports a facile novel approach to prepare asymmetric poly(vinylidene fluoride)/polystyrene (PVDF/PS) composite latex particles with controllable morphologies using one-step soap-free seeded emulsion polymerization, i.e., surface-initiated single electron transfer radical polymerization ...

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Micromechanical Cohesion Force between Gas Hydrate Particles Measured under High Pressure and Low Temperature Conditions

26.03.2015 | Bo Ram Lee; Amadeu K. Sum, Langmuir, 2015

To prevent hydrate plugging conditions in the transportation of oil/gas in multiphase flowlines, one of the key processes to control is the agglomeration/deposition of hydrate particles, which are determined by the cohesive/adhesive forces. Previous studies reporting measurements of the ...

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Advanced Structural Analysis of Nanoporous Materials by Thermal Response Measurements

25.03.2015 | Martin Oschatz; Matthias Leistner; Winfried Nickel; Stefan Kaskel, Langmuir, 2015

Thermal response measurements based on optical adsorption calorimetry are presented as a versatile tool for the time-saving and profound characterization of the pore structure of porous carbon-based materials. This technique measures the time-resolved temperature change of an adsorbent during ...

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Thermomechanical Transitions of Egg-Ceramide Monolayers

25.03.2015 | Elisa R. Catapano; M. P. Lillo; C. García Rodríguez; P. Natale; D. Langevin; F. Monroy; I. López-Montero, Langmuir, 2015

Ceramides have unique biophysical properties. Their high melting temperature and their ability to form lateral domains have converted ceramides into the paradigm of rigid lipids. Here, using shear surface rheology of egg-ceramide Langmuir monolayers, a solid to fluid transition was evidenced as a ...

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Electronic Signatures of a Model Pollutant–Particle System: Chemisorbed Phenol on TiO2(110)

23.03.2015 | Matthew C. Patterson; Chad A. Thibodeaux; Orhan Kizilkaya; Richard L. Kurtz; E. D. Poliakoff; Phillip T. Sprunger, Langmuir, 2015

Environmentally persistent free radicals (EPFRs) are a class of composite organic/metal oxide pollutants that have recently been discovered to form from a wide variety of substituted benzenes chemisorbed to commonly encountered oxides. Although a qualitative understanding of EPFR formation on ...

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Pressure–Temperature Phase Behavior of Mixtures of Natural Sphingomyelin and Ceramide Extracts

19.03.2015 | Hanna M. G. Barriga; Edward S. Parsons; Nicola L. C. McCarthy; Oscar Ces; John M. Seddon; Robert V. Law; Nicholas J. ..., Langmuir, 2015

Ceramides are a group of sphingolipids that act as highly important signaling molecules in a variety of cellular processes including differentiation and apoptosis. The predominant in vivo synthetic pathway for ceramide formation is via sphingomyelinase catalyzed hydrolysis of sphingomyelin. The ...

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Nanotextured Pillars of Electrosprayed Bismuth Vanadate for Efficient Photoelectrochemical Water Splitting

17.03.2015 | Hyun Yoon; Mukund G. Mali; Jae Young Choi; Min-woo Kim; Sung Kyu Choi; Hyunwoong Park; Salem S. Al-Deyab; Mark T. Sw ..., Langmuir, 2015

We demonstrate, for the first time, electrostatically sprayed bismuth vanadate (BiVO4) thin films for photoelectrochemical water splitting. Characterization of these films by X-ray diffraction, Raman scattering, and high-resolution scanning electron microscopy analyses revealed the formation of ...

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Imidazolium-Based Zwitterionic Surfactants: Characterization of Normal and Reverse Micelles and Stabilization of Nanoparticles

16.03.2015 | Franciane D. Souza; Bruno S. Souza; Daniel W. Tondo; Elder C. Leopoldino; Haidi D. Fiedler; Faruk Nome, Langmuir, 2015

This paper presents the physicochemical properties of micellar aggregates formed from a series of zwitterionic surfactants of the type 3-(1-alkyl-3-imidazolio)propane-sulfonate (ImS3-n), with n = 10, 12, 14, and 16. The ImS3-n dipolar ionic surfactants represent a versatile class of dipolar ionic ...

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