The pretreatment of French bean and the following its freezing was studied to obtain the material suitable for its long term freezing storage. The investigated object was made by dwarf yellow pod varieties (Laura, Tara) and yellow stake Atlas (Mamut type) one. The studied material was blanched in the water solutions at 60, 80 and 100°C with 1%, 2% or 5% NaCl and CaCl₂ at 1%, 2% respectively. The blanching time was 30, 60 and 120 s. The samples were air frozen at -35°C, the frozen material placed into the air-tight polyethylene bags and stored for 6 months at -30°C. The stored samples were assessed organoleptically every 14^th days. The longer blanching time at 100°C, the proportionally greater drip loss was recorded, in the extreme case up to 18% of sample weight before freezing. Application of NaCl and CaCl₂ affected changes of the cryoscopic point values. The not blanched samples underwent more intensive structure “lignification”.

Attempts to reduce net CO₂ emission and to increase the use of sustainable materials pose great challenges at the interface of chemical engineering and agricultural engineering. One of the products involved is thermoplastic starch that can partly substitute synthetic plastics, amongst others in packaging. In a first step a semi product is produced by mixing starch and a polyol in a cooking-extrusion process. The material obtained can than be used in other polymer processes, like extrusion, film blowing and injection moulding. Films with thicknesses of 200 μm can be achieved if gelatinisation is good and moisture content constant. In injection moulding shape stability can be retained by a judicious combination of moisture content and process temperature. The final objects can reach a strength comparable to commercial packaging plastics, like polystyrene. A problem that still exist is the sensitivity of the material to ambient moisture, both at short terms during production as at long times during usage. These problems increase with increasing surface to volume ratio of the final product like, for instance, films. Technologies where the material is coated or where the lubricant is immobilized have to be investigated to expand the use. From economical point of view it can be expected that the costs of the extra extrusion step during manufacturing of the semi-product can easily be covered by the price difference between starch and synthetic packaging plastics, like polyethylene, polypropylene or polystyrene.

Seeds of alfalfa c.v. Legend and hybrid alfalfa c.v. Radius were irradiated with divergent He-Ne laser bundle and sown on Petri dishes with four repetitions. Germination lasted for 10 days at a constant temperature 20 ±  1ºC. Seeds germinating normally, abnormally, hard seeds and those infected with pathogenic fungi were determined. The number of seeds germinating normally increased and hard seeds decreased upon laser stimulation.

Featured problematic modeling automatic control in process filtration cooling oil emulsion cooling elements of the bodymaker. Modeling process filling of tank build base by fuzzy logic. Selected method of the Takagi-Sugeno, enable prediction of level in tank filtration system. The automatic control system for the system filtration oil emulsion will allow for control of technological processes and maintenance. Furthermore, it will facilitate archiving of the process data and their analysis, at the same time facilitating use of the installation.

Featured methodic mathematical modeling and fuzzy logic model process membrane filtration cooling oil emulsion cooling elements of the bodymaker in production for food processing. Modeling by means of differential equation, when by membrane be due to smth dirtiness layer irreversible and gradually decline flux permeat is ineffective. It was made the analysis and selection control parameters. In article as alternative solution propose modeling by fuzzy logic.

The study presents the problems of automatic control of the filtration system of the emulsion that cools and lubricates working elements of the packaging press (body-maker). Lack of automatic control of this technological section (the subject of the study) made it impossible to integrate it with the packaging production line for agricultural and food products. The scope of the study comprised preparation of the control system on the basis of fuzzy logic. Working out the parameters and control factors, as well as the principles for fuzzy control allowed for achieving positive results of empirical verification. Conclusions point to the benefits achieved owing to the application of fuzzy logic for modelling and control of technological processes.

In this work the „brocade” method is presented and used to determine mechanical properties of biological materials. Young modulus and Poisson ratio have been determined for frozen fababean. Microscopy images of randomly deposited markers on samples surface have been transfered to computer memory. Then changes in marker positions were analyzed. The method is precise and can be applied also for wet materials. Moreover the method is not affected by any side effects present in the sample close to attachments. Results obtained for fresh, frozen and dried fababean have been compared. Young modulus and Poisson ratio were very close for frozen and fresh fababean samples.

The study presents modelling of subpressure in the milk chamber of the collector for changes of the milk flow diameter of 0, 1, 2, 3 mm. Computer simulation was made using Matlab^® Simulink software. The study was performed in the aspect of works on the automatic control of the milking apparatus for cows. Results of the simulation have been presented in diagrams which indicate that for the milk flux diameter of 0, 1, 2 and 3 mm, the sequences are of similar character. On this basis, a conclusion was drawn that changes of airflow volume caused by the change in milk flow diameter do not influence the value of subpressure changes in the milk chamber of the collector.