Under the light microscope, the epithelium of filiform papillae consists of an anterior and a posterior side. On the anterior side of filiform papillae the epithelium exhibited characteristics of soft keratinization, while on the posterior side – there were characteristics of hard keratinization. Conical papillae were covered by nonkeratinized epithelium. The keratinized layer was observed only on their ends. The filiform and conical papillae were separated by the interpapillary epithelium, which does not keratinize. The epithelium of the filiform and conical papillae were composed of three layers, i.e. basal, intermediate, and superficial layer.

The objective of the presented research project was to analyze pork quality factors with regard to various breeders of slaughter animals. Experiments were carried out on swine half carcasses, collected from fatteners delivered to slaughter house by three breeders from Wielkopolska province. Two types of muscles: m. longissimus lumborum and m. semimembranosus and two types of adipose tissue: subcutaneous (back fat) and internal (leaf fat) were analyzed. In meat samples the content of the following chemical components was analyzed: dry matter, total protein, fat and collagen content as well as physicochemical properties, such as: colour, acidity and drip loss. Besides, the effects of heat treatment on the sensory value of the raw meat, colour, exudates and tenderness were studied. Assessment of raw fats was carried out on the basis of measurement chemical components, selected physicochemical properties and content of fatty acids. Raw materials under investigation characterized by significant diversity between delivers of slaughter animals, however the quality of analyzed material was sufficient.

The metodology of a determination of some biometals content, i.e. chromium, cobalt, manganese, nickel and iron in Saccharomyces cerevisiae yeasts using UV-VIS spectrophotometer was worked out. An accuracy and precision of chosen analytical methods was determined. The comparison of results obtained with spectrometric ICP-AES method was conducted. Differences of mean values of results between those methods for analysed elements were +10.52, +8.11, -15.79, +1.33, +13.89, and +7.48 %, respectively. It was demonstrated that the UV-VIS spectrophotometric method may be successfully applied in analytical studies concerning a determination of microelements content in enriched yeasts biomass.