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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:06 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Collagen fluorescence measurements on nanosilver treated leather
Authors:
Ana Maria Dragne(a), Iulian Ionita(a), Carmen Gaidau(b)
Affiliation:
(a) University of Bucharest
(b) Leather And Footwear Research Institute Bucharest
E-mail
iulian.ionita@g.unibuc.ro
Keywords:
Fluorescence, collagene, nanosilver
Abstract:
Silver is known from many years for its antibacterial properties. Silver ions are a strong antiseptic with a broad spectrum. Treatment of textiles and leather with nanosilver particles is a new idea for real clean wear. The nanometer-size particles have a large specific surface resulting in the release of silver ions in antiseptic concentration on the surface of the product. Nanosilver applying on leather products provides anti-bacterial and anti-fungus function which makes good maintenance for leather more.
One way to investigate nanosilver treated leather is the intrinsic fluorescence of organic material. This fluorescence is provided mainly by collagen content. Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals, making up about 25 per cent to 35 per cent of the whole body protein content. There are four types of collagen throughout the body, but only Collagen One is found in the skin. Collagen has an unusual sequence of amino acids: Glycine (Gly), which is found at every third residue, Proline (Pro) and two uncommon derivate amino acids, Hydroxyproline and Hydroxylysine.
This work is a part of a research project to study collagen fluorescence of leather used in shoes industry. The Skin Skan spectrofluorometer was used, the only portable high performance, in-vivo, fiber-optic spectrofluorometer designed specifically for skin-fluorescence measurements, which also allows very low area measurements. During the experiment, the emission spectra were recorded for 360 nm excitation. Emission spectra were registered in two different areas of every leather sample. Measurements were made on Nanosilver particle solutions, Nanosilver leather treated and genuine leather.
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