Author:Singh, A; Smit, Jacoba E; Karsten, AE; Grobler, AF; Sparrow, RWDate:Sep 2010This study aims to extract and compare attenuation coefficients of different liquid skin-like phantoms representing Skin Types 1 to V1 with two methods, Spectrophotometric and Integrating Sphere methods. The correlation between the results ...Read more
Author:Van Kets, V; Karsten, A; Davids, LDate:Sep 2010Photodynamic therapy (PDT) has recently emerged as a treatment modality for photorejuvenation of the skin. This study is a preliminary investigation into the effect of different light sources to activate hypericin, a plant-derived photosensitizer ...Read more
Author:Karsten, A; Singh, A; Almonem, SADate:Sep 2010Raytracing computer models are valuable tools to determine the fluence at a specific depth into issue, but need to be verified before they can be used with confidence. Such a model for skin showed good agreement (within 10%) when compared ...Read more
Author:Abdalmonem, S; Harith, MA; Amin, RM; Karsten, A; Singh, ADate:Sep 2010Determination of the optical properties of solid and liquid samples has great importance. Since the integrating sphere-based setup is used to measure the amount of reflected and transmitted light by the examined samples, optical properties ...Read more
Author:Govender, P; Couling, VWDate:Sep 2010An adapted Michelson interferometric technique was used to measure strain induced birefringence in perspex. The birefringence was then used to determine the Kerr constant in perspex. The result obtained is compared to a colarimetric result ...Read more
Author:Masina, Bathusile N; Forbes, ADate:Sep 2010This presentation acknowledges that temperature induces damage in the diamond bits due to friction during the drilling process. The temperature of the diamond sample can be raised by laser heating it.Read more
Author:de Clercq, L; Botha, L; Uys, H; Du Plessis, A; Rohwer, EDate:Sep 2010Coherent control of the upper vibrational level populations in the electronic ground state of a polyatomic molecule was simulated. Results indicate that selective excitation of a specific upper state level is possibleRead more
Author:De Clercq, L; Botha, L; Uys, H; Du Plessis, A; Rohwer, EDate:Sep 2010Coherent control of the upper vibrational level populations in the electronic ground state of a polyatomic molecule was simulated. Results indicate that selective excitation of a specific upper state level is possible.Read more
Author:Ombinda-Lemboumba, Saturnin; du Plessis, A; Botha, LR; Rohwer, EG; Steenkamp, CMDate:Oct 2010The ultrafast dynamics of Zinc Phthalocyanine was studied using trasient absorption pump probe spectroscopy. Zinc Phthalocyanine was excited (pumped) at 672nm and probed by a white light continuum. The pump-probe technique used in this study ...Read more