نتایج جستجو برای: date cores particles

تعداد نتایج: 325916  

Journal: :Soft matter 2016
A Rauh M Rey L Barbera M Zanini M Karg L Isa

Soft hydrogel particles show a rich structural and mechanical behaviour compared to hard particles, both in bulk and when confined in two dimensions at a fluid interface. Moreover, encapsulation into hydrogel shells makes it possible to transfer the tunability of soft steric interactions to hard nanoparticle cores, which bear interest for applications, e.g. in terms of optical, magnetic and rei...

2000
Jordi Miralda-Escudé

Spergel & Steinhardt proposed the possibility that the dark matter particles are self-interacting, as a solution to two discrepancies between the predictions of cold dark matter models and the observations: first, the observed dark matter distribution in some dwarf galaxies has large, constant-density cores, as opposed to the predicted central cusps; and second, small satellites of normal galax...

2005
Huiping Xu Laurent Menard Anatoly Frenkel Ralph Nuzzo Duane Johnson Judith Yang

Our direct density function-based simulations of Ru-, Ptand mixed Ru-Pt clusters on carbon-based supports reveal that substrates can mediate the PtRu5 particles [1]. Oblate structure of PtRu5 on C has been found [2]. Nevertheless, the cluster-substrate interface interactions are still unknown. In this work, we present the applications of combinations of quantitative zcontrast imaging and high r...

2012
CHARLES A. NITTROUER

Floodplain sedimentation removes particles from fluvial transport and constructs stratigraphic records of flooding, biogeochemical sequestration and other aspects of the environmental history of river basins—insight that is enhanced by accurate geochronology. The natural fallout radionuclide 210Pb, often employed to date lacustrine and marine sediments, has previously been used to determine flo...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2012
Rolf Aalto Charles A Nittrouer

Floodplain sedimentation removes particles from fluvial transport and constructs stratigraphic records of flooding, biogeochemical sequestration and other aspects of the environmental history of river basins-insight that is enhanced by accurate geochronology. The natural fallout radionuclide (210)Pb, often employed to date lacustrine and marine sediments, has previously been used to determine f...

Metal nanoshells consists of a dielectric core surrounded by a thin noble metal shell, possess unique optical properties that render nanoshells attractive for use in different technologies. This paper reports a facile method for growth of small gold nanoparticles on the functionalized surface of larger silica nanoparticles. Mono-dispersed silica particles and gold nanoparticles were prepared by...

A. Kompany E. Goharshadi M. K. Otoufi, N. Shahtahmasebebi

Metal nanoshells consists of a dielectric core surrounded by a thin noble metal shell, possess unique optical properties, which render nanoshells attractive for use in different technologies. This paper reports a facile method for growth of small gold nanoparticles on the functionalized surface of larger silica nanoparticles. Mono-dispersed silica particles and gold nanoparticles were prepared ...

Journal: :Nucleic acids research 1981
V W Zayetz S G Bavykin V L Karpov A D Mirzabekov

The sequential arrangement of histones along DNA in nucleosome core particles was determined between 0.5 and 600 mM salt and from 0 to 8 M urea. These concentrations of salt and urea up to 6 M had no significant effect on the linear order of histones along DNA but 8 M urea caused the rearrangement of histones. Conformational changes in cores have been identified within these ranges of condition...

Journal: :The Journal of General Physiology 1966
A. D. Kaiser

The structure of bacteriophage lambda has been studied by electron microscopy of negatively stained particles. The phage particles will eject their DNA if they are heated or dialyzed against a chelating agent. The ghost particles, so formed, have a channel running down their tails. Since the channel is not visible in normal particles, the channel may be filled with part of the DNA molecule. Up ...

Journal: :Journal of the American Chemical Society 2007
Jean-Luc Bridot Anne-Charlotte Faure Sophie Laurent Charlotte Rivière Claire Billotey Bassem Hiba Marc Janier Véronique Josserand Jean-Luc Coll Luce Vander Elst Robert Muller Stéphane Roux Pascal Perriat Olivier Tillement

Luminescent hybrid nanoparticles with a paramagnetic Gd2O3 core were applied as contrast agents for both in vivo fluorescence and magnetic resonance imaging. These hybrid particles were obtained by encapsulating Gd2O3 cores within a polysiloxane shell which carries organic fluorophores and carboxylated PEG covalently tethered to the inorganic network. Longitudinal proton relaxivities of these p...

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