Plasma medicine Plasma medicine Plasma medicine is an emerging field that combines plasma physics, life sciences and clinical medicine. It is being studied in disinfection, healing, and cancer. Most of the research is in vitro and in animal models. It uses ionized gas (physical plasma) for medical uses or dental applications . Plasma, often called the fourth state of matter, is an ionized gas containing positive ions and negative ions or electrons, but is approximately charge neutral on the whole. The plasma sources used for plasma medicine are generally low temperature plasmas, and they generate ions, chemically reactive atoms and molecules, and
Experiments and Observations on Electricity the Leyden jar had an accumulation of electrical fire, which he labeled as "positive" ("plus"), and the other side had a deficiency of electrical fire, labeled "negative" ("minus"). These losses and gains of electrification were exactly equal and are essentially the modern law of charge conservation except that it is now recognized that negative charges exist in their own right, not just as a deficiency of positive charges. It is an important principle in modern science that explains the microphysics of the electrification of gross bodies. In these letters, Franklin introduced technical words that we use today for things related