Renal Ultrasound: Sonography of the Kidneys. Review literature: (Singer et al, 2006). Technique of Renal Ultrasound. Sonography of the kidney is best done in supine position and with inspiration of the patient. In adverse conditions, an elevation of the examination side by 30 degrees is helpful.
By Anne Marie Helmenstine, Ph.D. Chemical Change Definition: A chemical change is a process where one or more substances are altered into one or more new and different substances. Also Known As: chemical reaction.
By Anne Marie Helmenstine, Ph.D. Definition: A phase change is a change in the state of matter of a sample. A phase change is an example of a physical change. Also Known As: phase transition.Examples: An example of a phase change is water changing from a liquid to vapor. Another example of a phase change is melted wax cooling into solid wax. phase change is an example of a physical change. Also Known As: phase transition. Examples: An example of a phase change is water changing from a liquid to vapor. Another example of a phase change is melted wax cooling into solid wax.