PMC:2812708 / 22032-23622 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/2812708","sourcedb":"PMC","sourceid":"2812708","source_url":"https://www.ncbi.nlm.nih.gov/pmc/2812708","text":"Conclusion\nIndustrial β-carotene–gelatin composite particles are a highly heterogeneous system—both in particle size and chemical composition. Fractionation of this mixture in MWL-AUC allows to resolve individual components in the mixture and detect compositional changes in an experiment, which takes only 1 h. This proves the power of MWL-AUC as a direct technique that can differentiate particles with respect to size and UV/vis spectra. Although our current analysis does not allow to unambiguously assign the spectra to defined particles as the particle density, swelling, composition and size maybe varying simultaneously, the presented multiwavelength analysis allows insights into this complex system, which were not possible before by other techniques. We do not further evaluate the directly experimentally determined sedimentation coefficients as for our sample, in addition to the above mentioned polydispersity, pH effects as well as charge interactions between the colloids also have to be taken into account.\nDespite these restrictions, we have shown the existence of H-aggregates inside a sample that was previously known as J-aggregate and have detected spectral changes of different H-aggregate populations as well as changes in the electronic potential energy surfaces of different hybrid particles. We restricted ourselves to a semi-quantitative evaluation based on simple model-free transformations of the data of 1 out of 40 scans without any prior knowledge. Clearly, even richer phenomena can potentially be discovered with a global evaluation of the entire dataset.","divisions":[{"label":"title","span":{"begin":0,"end":10}},{"label":"p","span":{"begin":11,"end":1023}}],"tracks":[]}