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The therapeutic effect of the photodynamic therapy (PDT) depends on a combination of parameters that include drug dose, drug-light interval, oxygen in cells and light irradiance rate. It also varies according to the wavelength distribution of the light source. Finally, a homogeneous and reproducible illumination during the clinical PDT is determinant in preventing under- or overtreatment. So, the ...

Increasing oil-prices, a growing threat of oil-shortages, Kyoto agreements on green house gases, environmental effects and climate changes, are all elements that contribute to the concern for the future of our oil based economy. Not only the search for biofuels but also for bio-based polymers and a more extensive use of the natural resources by upgrading the value of natural fibres and side produ ...