a structure in the chloroplast of photosynthesizing cells, usu. one of an interconnected stack, having a pigmented membrane that is the site of photosynthesis. [< German Thylakoid (1961) < Greek thÈ³lakoeidá¸s resembling a bag =thylak(os) sack + -oÄidÄs -oid]
Round or rump roast almost two hours to reach medium rare, 3-pound roast six hours on low or longer. In a crock pot. On the stove top in a Dutch oven around two hours. Extra 15 minutes may be extended for medium or 30 minutes for well done. (source: http://www.ehow.com/way_5260879_long-cook-pound-roast.html).
A three pound roast would cook aproximately 2 to 2 1/2 hours at 325. The inside temperature should be 140 degree â¦ s for rare, 160 degrees for medium, and 170 degrees for well-done. Use meat theomometer for this.ut oven up to 400 for 15 minutes to sear roast, then turn down to 350. If in doubt use a knife and put a small cut in the thickest part of the roast. If you like medium rare it should be just pink inside. If you like it well done then cook a little longer and check in 15 minutes and if juices run clear it's done.