In the present study, catalytic activity of dense, porous, electrospun membranes polysulfone (PSF) and with sulfonated polystyrene (PSF_PSS) have been evaluated in reactions esterification oleic acid methanol, times that varied from 10 to 480 minutes. Conversion biodiesel has confirmed by FTIR quantified through gas chromatography. The results showed catalysts used were effective reaction studi...

abstract sesbania grandiflora leaves are extensively used locally since ancient time as in traditional systems. base on mainly folkloric use, we investigated to know the potential of sesbania grandiflora leaves extracts through biological works in vivo and in vitro. the ethanolic extract of s. grandiflora leaves was partitioned into ethyl acetate soluble fraction (esf), petroleum ether soluble ...

We tested whether increased mucin secretion due to ingestion of insoluble dietary fiber (IDF) affects small intestinal nutrient absorption in rats. Polystyrene foam (PSF) with a true expansion ratio of 54.9 was used as a model for IDF with high bulk-forming properties. In Expt. 1, rats were fed a control diet or diet containing 50 g PSF/kg for 1, 3, 5, or 7 d. Small intestinal mucin fractions w...

We describe the timeand position-dependent point spread function (PSF) variation of the Wide Field Channel (WFC) of the Advanced Camera for Surveys (ACS) with the principal component analysis (PCA) technique. The timedependent change is caused by the temporal variation of the HST focus whereas the position-dependent PSF variation in ACS/WFC at a given focus is mainly the result of changes in ab...

Objetivos. Examiné los efectos combinados del acceso a la atención primaria mediante el Programa de Salud Familiar (PSF) y las transferencias condicionadas de dinero en efectivo del Programa Bolsa Familia (PBF) sobre la mortalidad infantil posneonatal (MIPN) en Brasil. Métodos. Empleé un análisis ecológico longitudinal usando datos en panel de 4 583 municipios brasileños de 1998 al 2010, con 54...

Indo-Malaysian tropical peat swamp forests (PSF) sequester enormous stores of carbon in the form of phenolic compounds, particularly lignin as well as tannins. These phenolic compounds are crucial for ecosystem functioning in PSF through their inter-related roles in peat formation and plant defenses. Disturbance of PSF causes destruction of the peat substrate, but the specific impact of disturb...

BACKGROUND The image formed by the eye's optics is blurred by the ocular aberrations, specific to each eye. Recent studies demonstrated that the eye is adapted to the level of blur produced by the high order aberrations (HOA). We examined whether visual coding is also adapted to the orientation of the natural HOA of the eye. METHODS AND FINDINGS Judgments of perceived blur were measured in 5 ...

Even though 96% of the Universe is consisted of dark matter and dark energy, their nature is unknown since modern physics are not adequate to define their characteristics. One new approach that cosmologists are using, tries to define the dark Universe by precisely measuring the shear effects on galaxy images due to gravitational lensing. Except the shear effect on the galaxies, there is also an...