The results of statistic estimation of measurements done within surface waters monitoring programme were described. The biogens concentrations (the years 1994-1998) and the oxygen indicators (the years 1992-1996) in the measurement point on Odra river in Krajnik Dolny constituted the date base. The time changeability of these indicators was well described by Jog-normal and gamma distributions was shown. The normalised distributions were also given.The autocorrelation and the periodicity were examined. It was stated that the considered time sequences were characterised by the strong autocorrelation and the periodicity. Using the ARIMA process the modelling of measurement series was realised. After the selection of models, the programming of examined indicators changes was accomplished. It was shown that using ARIMA models valuable results can be obtained.

A catalytic combustion of organic admixtures of air belongs to the basic technologies of gas purification. A macrokinetics of admixtures combustion over the porous catalysts was described. The theoretical approach is in agreement with standard description of macrokinetics of the catalytic processes. The relationship between the fundamental magnitudes: observed process rate r*, reaction rate r in the kinetic zone, and a coefficient of the surface utilization η in the form r*= r · η have been described. These magnitudes combines the Thiele module φ. A kinetics equation for the isothermal and non-isothermal conditions was provided. The influence of mass and heat transfer in the catalyst grain on the course of the process was described by means of the surface utilization coefficient η. An equation describing this coefficient for both isothermal and non-isothermal conditions was given. The second part of this work concerns the application of theory. When the composition of purified gas is continuously varied, a quantitative approach is rather impossible. The theory was used for the qualitative analysis of process on the basis of the experimental results. A fulfillment of the first-order kinetics means that the degree of admixtures conversion does not depend on their initial concentrations. A non-isothermicity of the catalyst grain is expressed in such a way that the process rate observed over the large porous grains of the catalyst can be higher than the reaction rate in the kinetic zone. A temperature deference between the catalyst grains and flowing gas causes that the reactor can be stably operated at varied concentrations of admixtures and temperature over a relatively wide range. It was also demonstrated that the flammable admixtures may advantageously influence the conversion of hardly combustible admixtures

Research results of fluorine accumulation in fallow deers bones in Western Pomerania were presented. Fluorine contents denotation was made by potentiometer method with ioneselective elektrode use. Dependence of fluorine accumulation on age and individual features of animals, regions properties of investigated area and distances from emission sources of fluorine compounds were examined. Dependences characteristic for probabilistic variables were obtained. For measurements results description were used neural networks MLP, RBP, GRNN.