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Effect of Amphipathic HIV Fusion Inhibitor Peptides on POPC and POPC/Cholestero...

T-20 and T-1249 fusion inhibitor peptides were shown to interact with 1-palmitoyl-2-oleyl-phosphatidylcholine (POPC) (liquid disordered, ld) and POPC/cholesterol (1:1) (POPC/Chol) (liquid ordered, lo) bilayers, and they do so to different extents. Although they both possess a tryptophan-rich domain (TRD), T-20 lacks a pocket binding domain (PBD), which is present in T-1249. It has been postulated that the PBD d...

Diffusion coefficients of 2,2,2-trifluoroethanol/water mixtures

Aqueous mixtures of 2,2,2-trifluoroethanol have received significant attention in the last years because their applications, such as working fluid in Rankine cycle thermal engines or as solvent in studies of protein stability (protein folding). From the fundamental point of view, fluoroalcohols have an amphyphile character, due to the simultaneous presence of a hydrophobic (and alkane-phobic) fluorinated surfac...

Diffusion coefficients of chlorophenols in water by computer simulation

Cholophenols have found extensive industrial applications as wood preservatives or intermediated compounds for pesticide synthesis, and are also by-products of wood pulp bleaching processes [1]. As a result, they are nowadays common natural water contaminants, being considered priority substances by recent European Directives for Environmental Protection, due to their toxicity and persistence. The establishment...

A Family of Styrylcoumarins: Synthesis, Spectroscopic, Photophysical and Photoc...

A new family of 5-styrylcoumarins exhibit E–Z isomerization around the Cα[DOUBLE BOND]Cβ bond with large extinction coefficients, medium-lived excited states, and moderate fluorescence quantum yields (see picture). The alteration of these photophysical properties is also corroborated by computational studies.

Sensing and awareness of 360º immersive videos on the move

Tese de mestrado em Engenharia Informática, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2013 ; Ao apelar a vários sentidos e transmitir um conjunto muito rico de informação, o vídeo tem o potencial para causar um forte impacto emocional nos espectadores, assim como para a criação de uma forte sensação de presença e ligação com o vídeo. Estas potencialidades podem ser estendidas atra...

DFT Study on Redox-Switchable Second-Order Nonlinear Optical Properties of η5-M...

Density functional theory (DFT) has been carried out to investigate the switching of the second-order nonlinear optical (NLO) properties of η5-monocyclopentadienyliron(II) and ruthenium(II) model complexes presenting 5-(3-(thiophen-2-yl)benzo[c]thiophen-1-yl)thiophene-2-carbonitrile as a ligand. The switching properties were induced by redox means. Both oxidation and reduction stimulus have been considered and ...

Photochromism of 5-styryl coumarins: potential utility as memory media

Photochromism of 5-styryl coumarins: potential utility as memory media Sérgio Martins1, João Avó2, A. Jorge Parola2, João C. Lima2, Paula S. Branco2, João Paulo Ramalho1 and António Pereira1 1Centro de Química, Departamento de Química, Universidade de Évora, Évora, Portugal. 2REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Portugal. Photochromism, the rever...

Excess Thermodynamic Properties of Mixtures Involving Xenon and Light Alkanes: ...

As a natural extension of a previous work, excess molar enthalpies and excess molar volumes as a function of composition in a wide range of temperatures have been obtained for binary mixtures of xenon with ethane, propane, and n-butane by Monte Carlo computer simulation. Xenon was modeled by a simple spherical Lennard-Jones potential, and the TraPPE-UA force field was used to describe the n-alkanes. One of the ...

Effect of the structure of commercial poly(ethylene oxide-b-propylene oxide) de...

Water-in-crude oil emulsions are formed during petroleum production and asphaltenes play an important role in their stabilization. Demulsifiers are added to destabilize such emulsions,however the demulsification mechanism is not completely known. In this paper, the performances of commercial poly(ethylene oxide-b-propylene oxide) demulsifiers were studied using synthetic water-in-oil emulsions and model-systems...

Thyroid Function, Serum Lipids and Insulin Resistance in Patients with Autoimmu...