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.
4. Bacterial Smears and Simple Stains Introduction The refractive index of most bacteria is only slightly greater than that of water; therefore bacteria are difficult to see in liquid suspension because they are almost transparent. To visualize bacteria, stains are used. Bacteria usually carry a negative charge (-).