108RB has absorption maxima at 220, 265, 375,and 446 nm in water and is yelloworange incolor. When aqueous solutions containingRB are exposed to s<strong>un</strong>light, RB is convertedinto lumichrome (LC) <strong>un</strong>der neutralconditions, and into lumiflavin (LF) inalkaline solutionsBased upon these studies, it can be concluded that in vivo riboflavin photochemistrydoes not lead to further health problems due to irradiation of riboflavin or the production of itsphotodegradation products, even over long periods of time.
10914. UTILIZAREA EXTRACTELOR VEGETALE IN OBTINEREA DE PRODUSE, CUEFECT TERAPEUTICD.Simion 1 , V.Trandafir 2 , I.Mitrana 3 , E.Sandu 4 , M. Radu 1 , F.Radu 1 , M.Simion 51Centrul de Cercetari pentru Materiale Macromoleculare si Membrane.SA, Spl.Independentei202 B, sector 6, Bucuresti2INCDTP, Filiala ICPI, Str. Minulescu 93, sector 1, Bucuresti3IFIN, Magurele, Bucuresti4DRML, Str.Elev. Stefanescu Stefan nr. 9, sector 2, Bucuresti5MEDCENTER, Sos. Berceni nr.8, sector 4, BucurestiS-au ales pentru studiu doua extracte vegetale (din: tuia, măcese) a căror corelatiedintre compozitia chimica si efectele terapeutice nu a fost pina in prezent, pe deplin elucidata.Dupa identifi<strong>care</strong>a compusilor bioactivi (prin cromatografie in strat subtire si reactiispecifice), s-au concentrat in extractele analizate prin tehnici membranare dar si printr-ocombinatie originala, de mentinere in cimpuri de ultras<strong>un</strong>ete si radiatii gama. Extractelevegetale astfel prelucrate au fost utilizate in realizarea de creme si membrane transdermice, cuefect terapeutic in cosmetica si medicina.Produsele au fost testate pe subiecti umani si animale si s-a constatat ca au acti<strong>un</strong>i:cicatrizante, antiseptice, dermoregenerative.