Solvents purification mainly used in pharmaceutical field such as acetone and methyl ethyl ketone (MEK) were performed through hybrid silica membranes and from binary and multi-components mixtures. Two hybrid silica membranes—zirconia doped bis(triethoxysilyl)methane and bis(triethoxysilyl)ethane (BTESE)—were studied. Flux, permeance, and separation factor were evaluated depending on temperature, composition, and number of organic compounds in the feed. Dehydration tests of acetone were operated at 30 and 45 °C following by acetone and MEK purification at 50 °C from multi-components hydro-organic mixtures where hydrophilic compounds (water, methanol) but also hydrophobic (dichloromethane (DCM) and/or toluene) were present. Results showed that the presence of Zr nanoparticles affected flux and improved selectivity in the case of dehydration. Experiments related to acetone and MEK purification, revealed a mass transfer alteration and a decrease of performance, from 99 to 97 wt% and from 98 to 95 wt% respectively, when the number of compounds in the initial feed grown up and more precisely, in the presence of DCM and toluene thus highlighting a possible coupling effect.
– HCTN7. Plasma cholesterol level plays an important role in atherosclerosis and cardiovascular diseases. Piperine, an alkaloid form of black pepper is known to reduce cholesterol uptake. In this paper, piperine-loaded chitosan nanoparticles (CTS-PIP NPs) were prepared by ionic gelation method. Molecular interactions among the components were confirmed by FT-IR spectroscopy. Transmission electron microscopy (TEM) images revealed spherical-shaped nanoparticles with diameter of <100 nm. CTS-PIP NPs displayed positive ζ-potential(ZP) of about 31.6 mV. Dynamic light scattering (DLS) particle size (PS) distribution analysis indicated the mean particle size of CTS-PIP NPs was 245.9 nm, polydispersity index of 31%
In this stuty, sea rough fish were hydrolyzed with alcalase/peptidase combined enzymes (EA/EP). Response surface methodology (RSM) was employed to optimize the EA/EP, hydrolysis time, hydrolysis temperature, and enzyme to substrate ratio (E/S) to obtain a high hydrolysis degree. The optimum RSM operating conditions were EA/EP of 2.9, temperature 55.8oC, incubation time of 4.9 h, and substrate concentration at 0.45 %. Under these conditions, DH value of 56.2 % was obtained. Raw materials proximate composition, amino acid content of the hydrolysate was also evaluated. The results indicated that sea rough fish contains potentially valuable fraction with high protein content and were successfully converted into hydrolysates rich in essential amino acids for potential recommendations in the supplementation of animal and human diets.
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