Reusing dormant yeast

[RishoBrew]

Greetings and Salutations!

I saved the dormant yeast from my recent brewing adventures and wanted to your opinion if I can reuse it. One such specimen has been in a fridge 4/27-2015 (today is 5/18) and looks like the first photo. There isn't much separation.

Below is the one I harvested 24 hours ago from brew, looks lot better.

 

[flars]

Both jars are full of good yeast. The first jar has a little more hop debris, but the bottom layer still contains a large number of good yeast cells. This yeast can definitely be repitched if it was not from a very high gravity beer. Yeast from high gravity beers may have been to stressed to repitch. (How high is to high, I'm not sure.)
This thread will give you reassuring information.
https://www.homebrewtalk.com/showthread.php?t=519995