Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
A third control test, which can be called the "reagent-medium control test," can be carried out to ensure that no component of the medium reacts or inter-reacts with other components to form a turbid filtrate which could falsely indicate microbiological growth when there was none. http://www.freepatentsonline.com/3981777.html
Audrey Foster Works in field Native speaker of: English PRO pts in category: 10
"Staphylococcus epidermidis strains isolated from clinical sources showed a wide range of abilities to adhere to glass and plastic materials. The degree of adherence depended on a number of factors, most notably, the composition of the growth medium."