In August 2015, Morris self-released five songs as a self-titled extended play, Maren Morris, on Spotify. The songs garnered 2.5 million streams on Spotify in a month, with three songs appearing in Spotify's US and Global Viral 50 chart.
Differential Staining. Gram stain technique is a differential staining technique, which separates bacteria into two groups (discussed in earlier chapters), Gram-positive bacteria and Gram-negative bacteria. Another differential staining technique is acid-fast technique which differentiates species of Mycobacterium from other bacteria.
The final and third. step is applying a counter stain. A counter stain is used to stain all unstained biological. materials. Counter stains are usually a contrasting color to the primary stain. With the. Gram stain, the primary stain colors the cells violet and the counter stained bacteria are. red. Violet cells are âGram positiveâ because they have reacted to the stain.