Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content

Heading


ID#:14806
Description:Caption:
This image from 1975, depicts a spot plate containing three rows of specimen wells. The closest row, i.e., Row 1, contains an unknown culture specimen with no added indicator. Row 2, or the middle row wells contain culture specimens, to which Bromthymol Blue (bromothymol blue, BTB) indicator had been added. At right, you can see the partially filled bottle of indicator with its dropper top applicator. BTB can be used as an indicator when a change in pH is suspected. Under acidic conditions, where the pH is less than 7.0, the indicator will display a yellow coloration, and under alkaline, or basic conditions, where a pH greater than 7, BTB will display a blue coloration. Under neutral conditions, where the pH is 7.0, BTB will display a gray-green coloration.
High Resolution: Click here for hi-resolution image (18.37 MB)
Content Providers(s):CDC/ Dr. Gilda Jones
Creation Date:1975
Photo Credit:
Links:
Categories:
CDC Organization
Skip Navigation Links.

MeSH
Skip Navigation Links.
Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.

TOP