Honey is a source of natural antioxidant compounds exerting several health-beneficial effects. Since urban beekeeping is quite common, the fear among potential consumers about the quality and the safety of honey produced exclusively in the cities is observed. However, the antioxidant properties of urban honey have not yet been tested. We described the antioxidant properties of linden honey from urban and rural areas. We analyzed the total phenolic content, DPPH• radical scavenging activity, Trolox equivalent antioxidant activity assay, the protein content, and catalase activity. The analysis showed that all tested parameters were significantly higher in honey from rural areas than in urban samples. The differences in the obtained results are certainly not the effect of the floral composition of honey, but rather due to the location of the honeybee colonies. It seems that the consumption of honey from urban areas for health purposes should be considered.

In present study the authors determine the impact of active environment on destruction processes developing in single polymer polyester composites. The processes impact on the structure and selected (e.g. viscosity) mechanical features of these composites were examined. The work included the following stages: manufacturing of ordered and disordered linear fiber single polyester composites, preparation of samples in accordance with applicable testing standards, performing composites� degradation tests in different media (distilled water and sea water at 30oC,). Literature review has shown that this kind of material has not been examined in reference to active media impact on degradation processes. This work is part of the research on discussed composites� properties and recycling.

The Processes of Globalisation, mobility of the society, modernization of transport infrastructure, the desire to own means of transport contribute to the increased number of road vehicles and many transport problems. These include, above all, the occurrence of transport congestion, which in turn is the source of further problems of road transport systems. Environmental pollution, increased noise, occurring traffic hazards, difficult communication has a negative impact on the functioning of users of urban transport systems. In contrast to the increasing expectations of users of urban transport systems, systems supporting their safety and increasing the capacity of transport networks come out. One of the examples of the system is traffic lights. The implementation of this system allows for safer movement of individual road users, including pedestrians. The article discusses the problem of pedestrian safety in road traffic. The analysis of police statistical data on the number of accidents and their effects with the participation of pedestrians was presented. In addition, the results of research on the subjective assessment of pedestrian safety at road intersections using traffic lights are present-ed. The method of direct interview involving pedestrians as participants of road traffic was used.

Vulcanised rubber as a complex system is made from the basic component being virgin rubber and various components amounting to 10-15 per cent or even more. The material gains its most valuable properties in the final phase of processing i.e. vulcanisation. In mechanical as well as automotive engineering it is important for vulcanised rubber to be resistant to grease, oil and fuel in high operating temperatures. Being one of the very valuable isolation materials, vulcanised rubber is also characterised by dielectric and elastic properties as well as distinguished resistance to operating conditions (high/low temperature, weather conditions). All the above mentioned applications of vulcanised rubbers are also found in the shipyard industry. Their use is also very much predicated on the properties such as: ability to attenuate mechanical vibrations, high elasticity, considerable elastic deformability under static and dynamic loads, low permeability of water and gas, resistance to various chemicals, and other. The purpose of this article was to determine the hardness of vulcanised rubber samples obtained from various places on the “Izabel” inland barge. The scope of the study covered sampling and preparing the samples for testing (i.e. cleaning and degreasing the samples). Then, the hardness of the samples was measured using the Shore hardness test. The first part of the article presents the general concept of vulcanised rubber, its main components, properties, applications, and ageing. The second part focuses on the research scope and measuring the hardness of vulcanised rubber samples obtained from the “Izabel” inland barge.