pH modulation of porphyrins self-assembly onto polylysine

Article Abstract:

The fluorescence of porphyrins is altered by modulating the interactions between the anionic porphyrins and the protonated polylysine through the pH values. The tetraionic meso-tetrakis(4-sulfonatophenyl)porphine (H2TPPS) exists in monomeric form and its fluorescence is not pH-dependent. However, the addition of polylysine, self-aggregation in H2TPPS has been observed. Also, there is a modification in the intensity of the fluorescence versus the pH behavior showing a sigmoidal profile.

Porphyrins

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Structure and dynamics of lysozyme encapsulated in a silica sol-gel matrix

Article Abstract:

The structure and the dynamics of the model protein hen egg white lysozyme (HEWL) encapsulated in silica sol-gel matrices with enhanced stability are reported. The proteins are found to retain their native structure and functionality.

Science & research, Research, Electrostatics, Lysozyme, Structure, Monolithic poured slabs

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