Human activities on the Earth's surface change the landscape of natural ecosystems. Mining practices are one of the most severe human activities, drastically altering the chemical, physical and biological properties of the soil environment. Bacterial communities in soil play an important role in the maintenance of ecological relationships. This work shows bacterial diversity, metabolic repertoi...

Based on the fundamental combustible systems properties - distributed nonlinear energy sources and flow connection between environment elements an analysis of various combustion dust modes is presented. Depending ratio betweencharacteristic burning times (thermokinetic characteristics) heat transfer (scale characteristics), limiting are considered as self-ignition, diffusion auto-wave combustio...

The explosive atmosphere may be caused by flammable gases / vapours or combustible dust. If the amount of substance, mixed with air, is sufficient, then a source ignition needed to cause an explosion. Liquids (for example petrol and other fuels) solvents from industrial products emit which, when can ignite explode. At normal temperatures, liquids enough form mixtures heat, often thick, black, t...

In this study, MIE values measured with two different explosion tubes, HARTMANN and MIKE 3, are compared. Generally, MIKE 3 apparatus provides MIE results, which are equal or lower to those measured with the HARTMANN apparatus; this is particularly true for the energy ranges between 1 and 10mJ and higher than 100mJ. Differences observed can modify samples classification according to their sensi...