Gabriela Marginean

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Synopsis The photoprotective efficacy of some topical sunscreens was determined ex-vivo by spectrophotometric assay using an irradiation monochromator and a diffuse reflectance sphere. Transmission scans were run from 400 to 290 nm through human epidermis samples before and after application of products and protection factors (PF) were calculated. The(More)
Plasma chemically modified carbon nanofibers were characterized by X-ray photoelectron spectroscopy with regard to the content of carbon, oxygen, and nitrogen and the contribution of carboxylic groups or ester, carbonyl and hydroxylic groups or ether on the surface. Unfortunately, X-ray photoelectron spectroscopy only provides an average value of the first(More)
As-grown and heat-treated vapour grown carbon fibres (VGCF) in the as-prepared state, washed in HCl/H(2)O, and treated in O(2) plasma for different periods have been investigated by means of XPS and scanning electron microscopy (SEM). The surface energy of the carbon fibres before and after plasma treatment was determined from the wetting contact angle.(More)
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