Essential oils of ripe fruits and umbels of Chaerophyllum coloraturn L. (Apiaceae) were found by GC and GC/MS to contain very high percentage of (E)-Pfarnesene (79.21% and 68.40% respectively).

The transport of dangerous goods by road represents a specific problem, considering that these vehicles can have great negative effects on people and the environment in the event of an accident. In the last few decades, various methods have been defined for risk management in this area. Most of these methods are based on reducing the probability and the consequences of an accident. In a large number of cases, the probability of the occurrence is in much greater focus than the consequences. To fill this gap, we created a new model for assessing the consequences on the population in the event of a fire during gasoline transportation. The model is based on the hypothesis that hazard intensity is directly proportional to the intensity of the heat generated by the fire and inversely proportional to the distance from the accident. The model was implemented through a Belgrade case study with multi-agent simulation. The results of the paper show that there is a 43% probability that there would be between 11 and 28 casualties in the observed location in the event of an accident. This confirms the initial hypothesis and shows that the model can be successfully used to assess the consequences.

The buses have an irreplaceable role in the public transport system, regardless of city size. Buses powered by internal combustion engines (diesel, CNG) are still the most common concept of city buses, but in the last few years, the use of fully electric buses has been growing. One of the reasons for the increasing use of electric buses is their environmental advantages over conventional buses: zero emissions at the local level (tank-to-wheel) emission, more favorable CO2 emissions at the regional or national level (well-to-wheel), and higher energy efficiency. The EKO1 line (Vukov Spomenik-Belvil) has operated in Belgrade since 2016, with five full electric buses. The paper will present the environmental aspects of using electric buses on line EKO1 compared to diesel and CNG buses. The environmental aspects of electric buses were researched through the effects of reducing the emission of harmful exhaust gases caused by eliminating the use of diesel-powered or CNG-powered buses and introducing electric buses. Within the ecological suitability of the using electric buses, the emission of CO2 that occurs indirectly during electric-ity production was researched and a comparison was made with the emissions of CO2 caused by the combustion of diesel fuel and CNG in buses with conventional propulsion. The paper also examined the energy efficiency of buses with different drive systems on the line EKO1, based on the analyzed energy consumption. As a result of the analysis, the introduction of electric buses on the EKO1 line was justified from the point of view of improving the environment through the reduction of harmful gas emissions and decarbonization as well as better energy efficiency.

Razvoj različitih podsustava javnog gradskog prijevoza je uzrokovan različitim razinom zahtjeva korisnika, okruženjem i prirodnim ograničenjima i preprekama. U želji da se prevladaju zemljopisne i topografske prepreka kao što su...

The emergence of new sustainable transport options - micromobility, has opened up a number of different issues, among which the most prominent ones are: the issue of infrastructure and the need to transform urban space, and the issue of the safety of users of these vehicles in traffic. Despite the advantages that micromobility offers: flexibility, accessibility, efficiency on short distances, attractiveness, etc., there are also evident problems that represent a great challenge for the coexistence of new mobility options with traditional modes of transport. In the first part of this paper, through a literature review will be considered the most common issues related to the integration of micromobility into modern transport systems: the impact on urban mobility, redistribution and lack of space and traffic safety. The second part deals with the challenges faced by decision-makers, engineers of various professions, as well as users of new transport options in the Republic of Serbia in the process of implementing these vehicles, including a brief analysis of the road users traffic safety. In the following, the most significant results will be presented and discussed with the aim of pointing out the various aspects and effects (at the global and national level) that the use of micromobility vehicles brings with it, and especially their impact on sustainable urban mobility and traffic safety.