AI Article Synopsis
- The study investigates the fractal dimensions of large unilamellar vesicles created from three different phospholipids in the presence of La3+, using techniques like DLCA and RLCA for measurement.
- It examines how the zeta potential varies among the phospholipids (EYPC, DMPC, and DPPC) in response to increasing La3+ concentrations, highlighting that DMPC's zeta potential shifts from negative to near zero.
- The growth patterns of DPPC and DMPC were observed to follow different aggregation regimes depending on La3+ levels, with the final size of EYPC aggregates significantly impacted by La3+ concentration, resulting in fractal dimensions ranging from 1.8 to 2.1.
Article Abstract
A study of the fractal dimension of the aggregation of three different types of large unilamellar vesicles, formed by egg yolk phosphatidylcholine (EYPC), dimyristoyl-phosphocholine (DMPC), and dipalmitoyl-phosphocholine (DPPC), in the presence of La3+, is presented. Aggregate liposome fractal dimensions were calculated by two methods, aggregation kinetics, using the approaches diffusion-limited cluster aggregation (DLCA) and reaction-limited cluster aggregation (RLCA) and angle-scattering light dispersion. Electrophoretic measurements show a similar variation of the zeta potential (zeta potential) for EYPC and DPPC, with a small increase of initial positive values. However, the zeta potential of DMPC changes from a initial negative value to near zero with increasing La3+ concentration. The evolution of the aggregate sizes was followed by light scattering. DPPC and DMPC show a RLCA regimen growth at low La3+ concentrations and a DLCA regimen at higher concentrations. In the case of EYPC, the final size of aggregation strongly depends on La3+ concentration. The calculated fractal dimension is in the range 1.8 to 2.1.
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| http://dx.doi.org/10.1103/PhysRevE.76.011408 | DOI Listing |
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