Introduction: Diabetes mellitus is the most common metabolic disease in the world. There is very important influence of patients knowledge and their families knowledge about type 2 diabetes to the risk reduction, treatment and prevention of disease. The aim: The aim of the research was to estimate the connection between the knowledge of patients and their families about the risk factors, symptoms, treatment and prevention of type 2 diabetes and occurrence of diabetes. Participians and methods: The study was conducted by randomly interviewing 102 volunteers in Tuzla. The main instrument of the research was self-designed questionnaire on risk, symptoms and the treatment of diabetes. We measured values of glucose in blood for all volunteers. Results: The results of this study suggest that patients and their family members are not informed enough about the risks, symptoms and treatment of type 2 diabetes. Conclusion: There was a significant connection between the number of correct answers with the knowledge of diabetes.

In this paper, for characteristic polytropic change of state of ideal gas is given graphical planimetric graphical representation of the most important energy values in workplace and thermal diagram, trough the appropriate area. In this paper, we used differential forms of First and Second law of thermodynamics and basic equation which define the observed change of state, written in a suitable form. The results for the polytropic change of state, are applied to the isobaric and isochoric change of state. It is shown that any of the energy values ( q12, w12, wt12, Δh12, Δu12) can be present in both workplace (p, v) as well as thermal (T-s) diagram. Graphical solutions, compared to the analytical, provide efficient theoretical explain and presentation of various thermo-dynamical processes of ideal gas with different aspects and greatly assist a clearer view of the problem and enhance each other living arrangement. Graphical representation of external influences or energy values shown in the diagrams, make it possible to more clearly we see connection between these effects, change of state, as well as their each other relations. This is particularly evident in the case when there are (p, v) and (T-s) diagram for a particular ideal gas, which is common in technical practices (e. g., air as an ideal gas).