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 atheism atheism as a way of life in his 1972 book, "Positive Atheism". Similarly, the Atheist Community of Austin (ACA) uses the term "positive atheism" in the sense of putting a positive face to atheism and dispelling the false and negative image of atheism portrayed by religious people, especially in places of worship. "Positive Atheism Magazine" "sees atheism as being a positive, healthy outlook -- much healthier than any theistic approach to life." Agnostics are not always merely implicit atheists. For instance, Philip Pullman, the English author of the "His Dark Materials" fantasy trilogy, which has atheism as a major theme,