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
Negative and positive rights both "positive" and "negative" duties, but it seems that rights that do not involve forced labor can be phrased positively or negatively at will. The distinction between positive and negative may not be very useful, or justified, as rights requiring the provision of labor can be rephrased from "right to education" or "right to health care" to "right to take surplus money to pay teachers" or "right to take surplus money to pay doctors". Negative and positive rights Negative and positive rights are rights that oblige either action ("positive rights") or inaction ("negative rights"). These obligations may be of either