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.
Chemical reaction is a process of changing from one chemical state to another and chemical change is a change in the state of a material. For example, Iron when exposed to atmosphere becomes rust. Here, chemical reaction is called ârustingâ and the chemical change is âfrom iron to iron oxideâ.