A non-destructive 'in situ' Raman spectroscopic study was carried out on 28 artistic glasses grouped in eight age classes between 1750 and 1940, in order to characterize the authenticity (age) of these objects. Other non-'in situ' instrumental methods which require only micro amounts of sample, should be avoided in this ease owing to the great brittleness of the samples. Although it was not found possible to characterize the age of the samples from the Raman spectra, which were very similar for all the different glasses examined, nevertheless, the intensity of the fluorescence band increased with the age of the samples. The logarithm of the ratio between the 1880 cm(-1) Raman band intensity and that of the fluorescence band, obtained from the spectra where the fluorescence band was kept at the same intensity for the different samples, shows a linear relationship with the age of the glasses, and therefore constitutes a spectroscopic marker for the characterization of the authenticity of the samples.

Raman and infrared spectra of two types of disposable soft contact lenses are presented and discussed in order to correlate the chemical structures of the polymers to bacterial adhesion on their surface. The results of the adhesion study show that Staphylococcus aureus adheres better to more hydrophilic lenses. The spectroscopic results point out that the different chemical structures of the polymers can explain not only the different water amounts in the lenses, but also play an important role on the adhesion capability of Staphylococcus aureus.

ChemInformVolume 20, Issue 6 Reviews ChemInform Abstract: Molecular Interactions and Properties of Biologically Active Compounds: IR and Raman Spectroscopic Studies A. BERTOLUZZA, Dip. Biochim., Univ. Bologna, 40126 Bologna, ItalySearch for more papers by this authorC. FAGNANO, Dip. Biochim., Univ. Bologna, 40126 Bologna, ItalySearch for more papers by this authorG. FINI, Dip. Biochim., Univ. Bologna, 40126 Bologna, ItalySearch for more papers by this authorM. A. MORELLI, Dip. Biochim., Univ. Bologna, 40126 Bologna, ItalySearch for more papers by this author A. BERTOLUZZA, Dip. Biochim., Univ. Bologna, 40126 Bologna, ItalySearch for more papers by this authorC. FAGNANO, Dip. Biochim., Univ. Bologna, 40126 Bologna, ItalySearch for more papers by this authorG. FINI, Dip. Biochim., Univ. Bologna, 40126 Bologna, ItalySearch for more papers by this authorM. A. MORELLI, Dip. Biochim., Univ. Bologna, 40126 Bologna, ItalySearch for more papers by this author First published: February 7, 1989 https://doi.org/10.1002/chin.198906330Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume20, Issue6February 7, 1989 RelatedInformation

Infrared and Raman spectra of gels obtained from specially prepared solutions of Si(OC2H5)4 (TEOS) which have been thermally treated in the 40–800°C temperature range, are reported and discussed with reference to the spectra of fused quartz.

Examples of a class of glassy biomaterials with chemical composition similar to that of bone have been prepared by heating mixtures of calcium metaphosphate and hydroxylapatite. The Raman and infrared spectra of these materials are reported and discussed in relation to glass structure, which is of the linear polymeric type with chain length depending on the molar ratio R=[CaO]/[P2O5]. The products of the thermal decomposition of hydroxylapatite have also been characterized spectroscopically.

Infrared and Raman spectra of the three forms of metaboric acid (orthorhombic, monoclinic and cubic) are presented and discussed. The behaviour of the asymmetric stretching vibration voh and of the in-plane and out-of-plane deformations δOH and γOH shows that hydrogen bonds of different "strengths" are present in the three forms of metaboric acid, in accordance with X-ray diffraction measurements. This phenomenon is explained in a qualitative way by a valence bond treatment of the structural centres present in the three forms of metaboric acid. The remaining vibrational modes are related to the analogous modes present in borates and polyborates of known structure.

Infrared spectra of ternary glassy materials As2O3V2O5PbO are presented and discussed on the basis of a previous spectroscopic research on the binary systems As2O3PbO, V2O5PbO and As2O3V2O5.