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Chemico-physical and functional properties of inorganic sunscreens in cosmetic products (1994)

SEMENZATO, A. ; DALL'AGLIO, C. ; BOSCARINI, G.M. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

International journal of cosmetic science 16 (1994), S. 0

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ISSN: 1468-2494

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Medicine

Notes: This paper reports preliminary results of a study carried out on liquid crystal emulsions added to three different inorganic sunscreens: ultrafine zinc oxide, ultrafine titanium dioxide (inorganic-treated) and ultrafine titanium dioxide (organic-treated hydrophobically).The aim of the work was to investigate the influence of chemico-physical properties of inorganic sunscreens on the microstructure of cosmetic emulsions. The study was carried out using three different techniques: rheological measurements performed in dynamic conditions, to study the homogeneity of samples and their structural features; dispersion of powders in emulsions by optical microscopy and SEM/EDX analysis; and functionality of emulsions by UV spectroscopy, with adhesive tape as substrate.Results show that the different chemico-physical properties of the micropigments lead to different interactions with emulsion components; these interactions may affect the functionality and microstructure of the whole system, with loss of stability.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1467-2494.1994.tb00101.x

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X-ray crystallographic characterization of 10,11-dihydro-5H-dibenz[b, f ]azepine-5-carboxamide (1992)

Bandoli, G. ; Nicolini, M. ; Ongaro, A. ; [et al.]

Springer

Journal of chemical crystallography 22 (1992), S. 177-183

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ISSN: 1572-8854

Source: Springer Online Journal Archives 1860-2000

Topics: Geosciences , Physics

Notes: Abstract The structure of the title compound was determined by the direct methods and refined by fullmatrix least-squares to anR of 0.041 for 1467 diffractometer-measured reflections. The dihedral angle between the aromatic-ring mean planes is 128° and the central seven-membered azepine ring adopts a boat conformation, as usual for compounds of this type. X-ray powder diffraction of the compound indicates that the crystal selected appears to be representative of the sample as a whole.