The article deals with the process of “waxing” pipes and choice effective measures to prevent these negative phenomena. To assess nature asphalt-resin-paraffin deposits (ARPD) select a further investigation scheme, X-ray Spectral analysis was used. It is shown, that ARPD complex system structured by resinous-asphaltene substances paraffin-naphthenic or paraffin-aromatic hydrocarbons.Mass transf...

The low thermal conductivity of phase change material (PCM) leads to low heat storage/retrieval rates. The expanded graphite (EG) was used to enhance the thermal conductivity. EG/paraffin composite with the 7% mass fraction of EG was prepared as a good candidate for the latent thermal energy storage (LTES) system. A shell and tube LTES system built for room heating and hot water supply in a fam...

BACKGROUND Rabies is one of the most hazardous zoonoses in the world. Oral mass vaccination has developed into the most effective management method to control fox rabies. The future need to control the disease in large countries (i.e. Eastern Europe and the Americas) forces cost-benefit discussions. The 'Increase bait density' option refers to the usual management assumption that more baits per...

OBJECTIVE To explore what individuals at risk of injury from using paraffin (also known as kerosene) know about paraffin safety, what they do to protect themselves and their families from paraffin-related injury, and how they perceive their risk for such injury. Also, to explore interrelations between these factors and age, sex, education and income. METHODS A sample of 238 individuals was ra...