After a criminal act a perpetrator may try to wash the bloodstains, either by hand wash in cold water or using a regular washing machine. The washing procedure can alter original bloodstains on fabric. The current experiment was focused on determining an effect of blood drying time and various washing conditions (water temperature, detergent use, machine, and hand wash simulated washing) on presentation of bloodstains on washed cotton fabric. The result of this experiment suggests that regular hand wash procedure in cold water (30°C), regardless of drying time lapsed from the deposition of blood on fabric until washing, would not be sufficient to completely remove or destroy original contour of the bloodstain on cotton fabric. All tested samples washed at 60 and 95°C suggest that a machine washing procedure with the usage of detergent should be sufficient for removing visible bloodstains from cotton fabric, but not for latent bloodstains. As an advice for prosecutors, even in case of no obvious bloodstains, bloodstain pattern analysts should always examine clothing of the suspects in all criminal cases connected with bloodshed event.

Banana is a climacteric fruit that undergoes a ripening process in airtight chambers at a certain temperature, appropriate ethylene concentration, and the time it takes for the fruit to reach maturity level 4 on the ripening scale. For commercial purposes an ethylene concentration of 1000 ppm is used, and depending on other factors the concentration may vary. Through a research the best result has been achieved with an ethylene concentration of 900 ppm and the fruit exposure to 18C for a treatment period of 120 h. These parameters reduced costs by RSD 91.896,95 at annual level compared to the commercial concentration of ethylene, the quality of the fruit did not deteriorate greater efficiency in business has been achieved.