The hole-punch method is the only suitable diffusion technique for aqueous extracts, because interference by particulate matter is much less than with other types of reservoirs. To ensure that the sample does not leak under the agar layer, fixed agar is left on the bottom of the hole (Cole,...
You might think that feeding cattle is as simple as just putting some hay in front of them. However, the reality is that it involves knowing what feed is available, what and how much your cattle should be fed, and how that feed is going to...