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.
So, if youâre like Jon and donât like writing bibliographies, hereâs how you can insert citations into Word and format bibliographies using common formats, such as MLA, APA, and Chicago-style. To add a citation after a quote: 1  In your Word document, click on the References tab in the Ribbon. 2  In the Citations & Bibliography group, click the arrow next to Style. 3  Click the style that you want to use for the citation and source. 4  Click at the end of the sentence or phrase that you want to cite.