Results 21 to 30 of about 368,707 (256)
Unraveling Aging Processes by Molecular Dynamics in High Impact Polystyrene/Organoclay Nanocomposites using Solid-State NMR to understand the microplastics generation [PDF]
Anais da Academia Brasileira de CiênciasHigh-impact polystyrene (HIPS) nanocomposites containing organoclay were investigated under UV-accelerated aging using solid-state NMR to elucidate the evolution of molecular mobility and morphology.
PAULO SERGIO RANGEL CRUZ DA SILVA +1 more
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Organic Materials, 2022 Electrical conductivity is one of the key parameters for organic thermoelectrics and depends on both the concentration and mobility of charge carriers. To increase the carrier concentration, molecular dopants have to be added into organic semiconductor ...
Yan Zeng, Guangchao Han, Yuanping Yi
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Molecular mobility in glassy dispersions
The Journal of Chemical Physics, 2016 Dielectric spectroscopy was used to characterize the structural relaxation in pharmaceutical dispersions containing nifedipine (NIF) and either poly(vinyl) pyrrolidone (PVP) or hydroxypropyl methylcellulose acetate succinate (HPMCAS). The shape of the dielectric response (permittivity versus log time) curve was observed to be independent of temperature.
Mehak Mehta +2 more
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ОСОБЕННОСТИ САМОДИФФУЗИИ В НЕФТИ ТУЛЬСКОГО ГОРИЗОНТА ЯМАШИНСКОГО МЕСТОРОЖДЕНИЯ
Известия высших учебных заведений: Нефть и газ, 2016 Using the NMR method with a pulsed magnetic field gradient the features of crude oil self-diffusion were investigated on samples of oil from the Tula horizon, the oil field Yamashinskoye. It was found that the samples were characterized by a complicated (
N. K. Dvoyashkin, R. N. Burkhanov
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Frontiers in Chemistry, 2021 Charge mobility is an essential factor of organic crystalline materials. Although many investigators have made important progress, the exact relationship between the crystal structure and carrier mobility remains to be clarified. Fortunately, a series of
Shi-Ping Wang +7 more
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Molecular Mobility of the Paracetamol Amorphous Form.
Chemical and Pharmaceutical Bulletin, 2000 The purpose of this paper is to study the molecular mobility of paracetamol molecules in their amorphous state below the glass transition temperature (Tg) in order to evaluate the thermodynamic driving force which allows the amorphous form to recrystallize under different polymorphic modifications. Samples were aged at temperatures of -15, 0, 6, and 12
DI MARTINO, Piera +2 more
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Pharmaceutics, 2019 Biodegradable poly lactic-co-glycolic acid (PLGA) microspheres can be used to encapsulate peptide and offer a promising drug-delivery vehicle. In this work we investigate the dynamics of PLGA microspheres prepared by freeze-drying and the molecular ...
Talia A. Shmool +4 more
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Rheological and Microstructure Evaluations of Amorphous Sucrose-Maltodextrin-Sodium Citrate Mixture
Applied Rheology, 2017 Rheological properties and the mechanical relaxation behavior of rubbery amorphous sucrose-maltodextrin-sodium citrate systems were studied at room temperature using the small amplitude oscillatory shear test in the frequency range of 0.1 - 150 Hz.
Sritham Eakasit, Gunasekaran Sundaram
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Pharmaceutics, 2018 Amorphous solid dispersions are considered a promising formulation strategy for the oral delivery of poorly soluble drugs. The limiting factor for the applicability of this approach is the physical (in)stability of the amorphous phase in solid samples ...
Michael Brunsteiner +2 more
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Classical Molecular Dynamics with Mobile Protons [PDF]
Journal of Chemical Information and Modeling, 2017 An important limitation of standard classical molecular dynamics simulations is the inability to make or break chemical bonds. This restricts severely our ability to study processes that involve even the simplest of chemical reactions, the transfer of a proton.
Themis Lazaridis, Gerhard Hummer
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