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Crystallization of alkane mixtures has been studied extensively for decades. However, majority of the available data consider the behaviour of alkanes with chain length of 21 C-atoms or more. Furthermore, important information about the…

Materials Science · Physics 2023-12-13 Diana Cholakova , Martin Pantov , Slavka Tcholakova , Nikolai Denkov

Uranus' bulk composition remains unknown. Although there are clear indications that Uranus' interior is not fully convective, and therefore has a non-adiabatic temperature profile, many interior models continue to assume an adiabatic…

Earth and Planetary Astrophysics · Physics 2024-01-23 Benno A. Neuenschwander , Simon Müller , Ravit Helled

Acrylic acid (AA) is a monomer commonly employed in emulsion polymerization to provide electrostatic colloidal stability and improve specific film performance. The addition of AA not only modifies the kinetics of the polymerization, but…

Statistical Mechanics · Physics 2008-05-31 Yuri Reyes-Mercado , Francisco J. Rodriguez-Gomez , Yurko Duda

Many organic molecules have been observed in the interstellar medium thanks to advances in radioastronomy, and very recently the presence of urea was also suggested. While those molecules were observed, it is not clear what the mechanisms…

Astrophysics of Galaxies · Physics 2018-02-21 Flavio Siro Brigiano , Yannick Jeanvoine , Antonio Largo , Riccardo Spezia

The effects of ion beam induced atomic mixing and subsequent thermal treatment in Si/C multilayer structures are investigated by use of the technique of grazing incidence X-ray diffraction (GIXRD) and Raman spectroscopy. The [Si (3.0 nm) /…

Materials Science · Physics 2007-05-23 Ram Prakash , S. Amirthapandian , D. M. Phase , S. K. Deshpande , R. Kesavamoorthy , K. G. M. Nair

This paper explores structural, interfacial and thermal properties of two types of Pickering emulsions containing alpha-cyclodextrin inclusion complexes: on one hand, emulsions were obtained between aqueous solutions of alpha-cyclodextrin…

Soft Condensed Matter · Physics 2018-10-02 Raul Diaz-Salmeron , Ismail Chaab , Florent Carn , Madeleine Djabourov , Kawthar Bouchemal

A combination of high-resolution x-ray diffraction and a new technique of x-ray standing wave uorescence at grazing incidence is employed to study the structure of (Ga,Mn)As diluted magnetic semiconductor and its changes during post-growth…

Materials Science · Physics 2009-11-11 V. Holy , Z. Matej , O. Pacherova , V. Novak , M. Cukr , K. Olejnik , T. Jungwirth

The shear-jamming of dense suspensions can be strongly affected by molecular-scale interactions between particles, e.g. by chemically controlling their propensity for hydrogen bonding. However, hydrogen bonding not only enhances…

Soft Condensed Matter · Physics 2019-01-16 Nicole M. James , Chiao-Peng Hsu , Nicholas D. Spencer , Heinrich M. Jaeger , Lucio Isa

Observations from Spitzer and ground-based infrared spectroscopy reveal significant diversity in the molecular emission from the inner few AU of T Tauri disks. We explore theoretically the possible origin of this diversity by expanding on…

Solar and Stellar Astrophysics · Physics 2015-05-30 Joan R. Najita , Mate Adamkovics , Alfred E. Glassgold

The entrance-channel mass-asymmetry dependence of the compound nucleus formation time in light heavy-ion reactions has been investigated within the framework of semiclassical dissipative collision models. the model calculations have been…

Nuclear Theory · Physics 2009-09-25 A. Szanto de Toledo , B. V. Carlson , C. Beck , M. Thoenessen

The growth morphology and the effects of surface reconstruction/relaxation of the habit faces on the crystal morphology of urea crystal are investigated from first principle using the Hartman-Perdok approach. A procedure has been developed…

Materials Science · Physics 2007-05-23 M. K. Singh

We use the C/N ratio as a monitor of the delivery of key ingredients of life to nascent terrestrial worlds. Total elemental C and N contents, and their ratio, are examined for the interstellar medium, comets, chondritic meteorites and…

Earth and Planetary Astrophysics · Physics 2015-12-02 Edwin A. Bergin , Geoffrey A. Blake , Fred Ciesla , Marc M. Hirschmann , Jie Li

A new two-dimensional axi-symmetric ultraviolet radiative transfer code is presented, which is used to calculate photodissociation and ionization rates for use in chemistry models of flaring circumstellar disks. Scattering and absorption of…

Hypotheses: The aggregation number and length of spherocylindrical (rodlike, wormlike) micelles in solutions of an ionic surfactant and salt can be predicted knowing the molecular parameters and the input concentrations of the species. This…

Soft Condensed Matter · Physics 2020-10-20 K. D. Danov , P. A. Kralchevsky , R. D. Stanimirova , S. D. Stoyanov , J. L. Cook , I. P. Stott

Urea is a prebiotic molecule that has been detected in few sources of the interstellar medium (ISM) and in Murchison meteorite. Being stable against ultraviolet radiation and high-energy electron bombardment, urea is expected to be present…

Astrophysics of Galaxies · Physics 2023-11-03 J. Perrero , A. Rimola

This paper addresses the structural characterisation of a series of U/Fe, U/Co and U/Gd multilayers. X-ray reflectivity has been employed to investigate the layer thickness and roughness parameters along the growth direction and high-angle…

Here, we show by solution nuclear magnetic resonance measurements that the urea-unfolded protein apoazurin becomes elongated when the synthetic crowding agent dextran 20 is present, in contrast to the prediction from the macromolecular…

The electronic structure of Au-Sn intermetallic layers of different compositions grown on Au(111) to the thickness of several nanometers has been studied in this work. The layer, interface and the substrate related components in the Au 4$f$…

A urea-based tripodal receptor L substituted with p-cyanophenyl groups has been studied for halide anions by $^1$H NMR spectroscopy, density functional theory (DFT) calculations and X-ray crystallography. The $^1$H NMR titration studies…

Materials Science · Physics 2013-12-24 Avijit Pramanik , Douglas R. Powell , Bryan M. Wong , Md. Alamgir Hossain

An association behavior of uranyl ions in aqueous solutions is explored. For this purpose a set of all-atom molecular dynamics simulations is performed. During the simulation, the fractions of uranyl ions involved in dimer and trimer…

Chemical Physics · Physics 2013-01-01 M. Druchok , M. Holovko
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