A barium X-ray is a radiographic (X-ray) examination of the gastrointestinal (GI) tract. Barium X-rays (also called upper and lower GI series) are used to diagnose abnormalities of the GI tract, such as tumors, ulcers and other inflammatory conditions, polyps, hernias, and strictures.f the small intestine is to be examined, the patient may be asked to drink additional barium and a series of X-rays will be taken until the barium reaches the colon. Following the examination, barium may cause constipation.
Dr. Kevin J Mckenna, MD, is a Colorectal Surgery (Proctology) specialist in Hershey, Pennsylvania. He attended and graduated from State University Of New York Health Science Center Of Syracuse in 1988, having over 30 years of diverse experience, especially in Colorectal Surgery (Proctology).
These bacteria were lysed to release phage progeny. The progeny of the phages that were originally labeled with 32 P remained labeled, while the progeny of the phages originally labeled with 35 S were unlabeled. Thus, the HersheyâChase experiment helped confirm that DNA, not protein, is the genetic material.Hershey and Chase showed that the introduction of deoxyribonuclease (referred to as DNase), an enzyme that breaks down DNA, into a solution containing the labeled bacteriophages did not introduce any 32 P into the solution.he results of the AveryâMacLeodâMcCarty experiment, published in 1944, suggested that DNA was the genetic material, but there was still some hesitation within the general scientific community to accept this, which set the stage for the HersheyâChase experiment.