Purpose: To evaluate the effect of fullerene on chemical properties of naphazoline drug in   water by density functional theory (DFT) methods.   Materials and Methods: Naphazoline belongs to the imidazoline class of sympathomimetics.   The present study on naphazoline drug and its fullerene connected form were carried out using   computerized calculations of Gaussian program in b3lyp/6-31g le...

beverage emulsions are systems that are composed of two liquids including oil and water which are prepared by homogenizing oil phase in an acidic aqueous phase. they must be stable in both concentrated and diluted form for a period of 6-12 months upon standing at room temperature. two immiscible phases contained systems are thermodynamically unsta-ble. in other words, they are vulnerable to bre...

Initial burst is one of the major challenges in protein-encapsulated microparticle systems. Since protein release during the initial stage depends mostly on the diffusional escape of the protein, major approaches to prevent the initial burst have focused on efficient encapsulation of the protein within the microparticles. For this reason, control of encapsulation efficiency and the extent of in...

deviation from planarity—such as observed during cis/trans isomerization occurring in protein folding—should result in major changes in reactivity and other chemical properties of the amide bond. For example, rotation of the amide bond is coupled with formal rehybridization of the nitrogen atom to sp, with attendant pyramidalization and greatly increased basicity. The most common experimental a...

Detergents are customarily used to solubilize cell membranes and keep membrane proteins soluble in aqueous buffers, but they often lead to irreversible protein inactivation. Hemifluorinated amphiphiles with hybrid hydrophobic chains have been specifically designed to minimize the denaturating propensity of surfactants toward membrane proteins. We have studied the physical-chemical and biochemic...

Silica-titania monoliths with micrometer-scale macroporous and nanometer-scale mesoporous structure and high titania contents are prepared by sol-gel process and phase separation. Titanium alkoxide precursor was not effective in the preparation of high titania content composites because of strong decrease in phase separation tendency. Bimodal porous gels with high titania content were obtained ...

scanning impedance microscopy (sim) is one of the novel scanning probe microscopy (spm) techniques, which has been developed to taking image from sample surface, providing quantitative information with high lateral resolution on the interface capacitance, and investigating the local capacitance–voltage (c–v) behavior of the interface and ac transport properties. the sim is an ordinary afm equip...

silica refractory bricks are used especially in the metallurgical industries, due to desirable properties suchas high melting point, rigidity, and high temperatures strength. in this research, different amount of sicwere added to silica refractory containing different binders such as borax, boric acid, calcium nitride,sodium tri poly phosphate, sodium hexa meta phosphate (shmp) and lime. physic...