AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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Autori: RAMONA I. CHELCEA, DUMITRIȚA MOLDOVAN, DAN E. DEMCO, EUGEN CULEA, RADU FECHETE.
DOI: http://dx.doi.org/10.24193/subbchem.2017.1.06
Published Online: 2017-03-17
Published Print: 2017-03-31
VIEW PDF: IN VITRO DEGRADATION AND PHASE COMPOSITION OF COSMETIC EMULSIONS
Microscopic properties like network dynamics and phase compositions were studied for a series of commercially available cosmetics emulsions like hair shampoo, anti-UV shielding creams and hand and body creams. Proton longitudinal and transverse nuclear magnetic relaxations were measured by recording the 1D CPMG and 2D saturation recovery–CPMG echoes decays. The one and bi-dimensional inverse Laplace transformations reveals subtitle features which characterize the microscopic dynamic behaviour associated with the in vitro natural degradation of cosmetics. The IR and UV–VIS spectra were recorded and correlated with the NMR measurement.
Keywords: commercial cosmetics; NMR; T2 relaxation; T1-T2 correlation; NMR-MOUSE®, IR and UV-VIS spectroscopy
