Forensics: Ink Chromatography Lab 2015. Background: Chromatography is a method for analyzing mixtures by separating them into the. chemicals from which they are made. It can be used to separate mixtures like ink, blood, gasoline, and lipstick. In ink chromatography, you are separating the colored pigments that. make up the color of the pen.
Imaging diagnosis: Vascular loop syndrome with 7th - 8th CN Compression, Hemifacial spasm. Vascular loop syndrome Abnormal anatomical variation or course of vessel causing symptomatic compression over cranial nerves at IAC or Cp Angle cistern. Spasmodic hyperfunction of nerve due to compression.
A vascular ring is a congenital defect in which there is an abnormal formation of the aorta and/or its surrounding blood vessels. The trachea and esophagus are completely encircled and sometimes compressed by a ring formed by these vessels, which can lead to breathing and digestive difficulties. Most often this is because of persistence of the double aortic arch after the second month of fetal life.