Thixotropic gel is an inert (nonreacting) synthetic substance in the bottom of certain tubes. When a specimen in a gel tube is centrifuged the gel undergoes a change in viscosity and moves to a position between the cells and the serum or plasma, forming a physical barrier between them. This separation prevents the cells from continuing to metabolize substances such as glucose in the serum or plasma.
Placement of Citations. 1  Place a citation as close to the quoted or paraphrased material as possible without disrupting the sentence. 2  When material from one source and the same page numbers is used throughout a paragraph, use one citation at the end of the paragraph rather than a citation at the end of each sentence.
How to Cite Legal Materials. Follow the Bluebook style, as closely as you can. Below are examples based on the 18th edition of the Bluebook. For more help and explanations, consult the latest edition of The Bluebook: A uniform system of citation, kept at. the Reference Desk [ KF 245. B88 ], or ask your professor. For an APA style reference list, treat legal citations as works with no authors. Order them alphabetically. according to the first significant word or abbreviation in the entry.