نتایج جستجو برای: cosolvent
تعداد نتایج: 416 فیلتر نتایج به سال:
poor skin penetration. To improve the cutaneous absorption of drugs, various methods have been developed such as chemical penetration enhancers, novel vehicle systems and physical enhancement techniques including iontophoresis, sonophoresis, and electroporation. Supersaturated formulations are one of the vehicle systems, and its potential benefit has been examined by many investigators. Supersa...
Morphologies Observed in Ultraflexible Microemulsions with and without the Presence of a Strong Acid
We show that three different morphologies exist near the two-phase boundary of ternary systems containing a hydrotropic cosolvent. Based on synchrotron small- and wide-angle X-ray scattering combined with molecular dynamics, we rationalize the specific scattering signature of direct, bicontinuous, and reverse mesoscale solubilization. Surprisingly, these mesostructures are resilient toward stro...
The inactivation of spores of Penicillium oxalicum by supercritical carbon dioxide (SC-CO2) was optimized by response surface methodology. The optimal inactivation conditions of 16.8 MPa, 49°C, and 20 min were determined using ridge analysis, at which the predicted and experimental log10 reductions were obtained as 5.74 and 6.12, respectively. The synergistic effect of a cosolvent (ethanol), wh...
Mesoporous silica SBA-15 in the form of 10-30 μm sized sheets with unusually large ordered pores has been synthesized using heptane as a cosolvent in the presence of NH4F. The resulting morphology of 400 nm thick sheets that contain easily accessed, hexagonally arranged, 18 nm sized pores running parallel to sheet normal has not been previously reported. The material has a BET surface area of 5...
Under a wide variety of conditions, the addition of condensing agents to dilute solutions of random-coil DNA gives rise to highly compact particles that are toroidal in shape. The size of these condensates is remarkably constant and is largely independent of DNA molecular weight and basepair sequence, and of the nature of condensing agent (e.g., multivalent cation, polymers, or added cosolvent)...
Supercritical carbon dioxide extraction (scCO2) is chosen to a treatment to remove lignin and to peel off outer cell wall layers to expose S2 layer of aspen wood fibres. The aim is to find an effective and environmentally friendly method to advance the fibrillation of the BCTMP pulp. The effects of the treatment are analysed by using scanning electron microscopy (SEM). The chemicals used togeth...
Bicontinuous interfacially jammed emulsion gels (bijels) comprise networks of interpenetrating domains two immiscible liquids stabilized by nanoparticles at the fluid–fluid interface. Bijels were first reported in simulation, which subsequently spurred experimentalists to develop fabrication approaches including thermal quenching, cosolvent removal, and direct mixing explore bijels applications...
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