University, Diss., 2001--Bremen.

Universiẗat, Diss., 2000--Bonn.

Universiẗat, Diss., 2003--Heidelberg.

University, Diss., 2005--Jena.

The theme od this dissertation is " Application of Spectrophotometric methods for inspection adulteration of food". In the theoretical part, there are stated chapters regarding adulteration of food (in general), adulteration of honey, quality requirements on honey, spectroscopy and its categories. The dissertaion is focused on spectrophotometric measurements of honey and sugar syrup samples where colour and consistence of honey was monitored. The techniques used for the analysis are NIR spectrophotometry and UV/VIS spectrophotometry. The results gained were statistically and graphically processed. It follows from the outcome that using FT-NIR for adulteration of honey detection is an appropriate method for honey inspection. The least effective method for proving adulteration of honey is the spectrophotometry specification of the colour of honey. Using this method, it is not possible to prove the links between colour of honey and colour of sugar syrup.

Current trends in analytical chemistry is the introduction of instrumental methods that are quick and economical. This process is obviously not avoid potato field of chemistry, using optical methods - NIR spectroscopy. This thesis therefore focuses on the analysis of basic nutrition and most of all the determined parameters of potato tubers (dry matter, starch, N-substances and reducing sugars) using laboratory reference methods and their subsequent transfer to this new analytical method by creating appropriate calibration models. It is also part of the work is devoted to the statistical comparison of both analytical methods in order to determine whether these methods can replace each other. The measurement has been found that some parameters NIR spectroscopy can be replaced, while in others the conversion is not suitable. Specifically parameters starch, N-substances or dry matter had correlation coefficients (R) 0.901; 0.806 and 0.977, meaning satisfactory calibration models. Whereas on parameters carbohydrates, carbohydrates after hydrolysis with the values of correlation coefficients 0.769 and 0.786 is impossible to apply the method of NIR spectroscopy. Models for determining these are not suitable.

No description available.

The purpose of this review is to compile preclinical and clinical results on phthalocyanines (Pcs) as photosensitizers (PS) for Photodynamic Therapy (PDT) and contrast agents for fluorescence imaging. Indeed, Pcs are excellent candidates in these fields due to their strong absorbance in the NIR region and high chemical and photo-stability. In particular, this is mostly relevant for their in vivo activation in deeper tissular regions. However, most Pcs present two major limitations, i.e., a strong tendency to aggregate and a low water-solubility. In order to overcome these issues, both chemical tuning and pharmaceutical formulation combined with tumor targeting strategies were applied. These aspects will be developed in this review for the most extensively studied Pcs during the last 25 years, i.e., aluminium-, zinc- and silicon-based Pcs.

No description available.

No description available.