The pure #beta# and #alpha# forms of D-glucose rotate the plane of polarized light to the right by 112Â° and 18.7Â° respectively (denoted as +112 and +18.7). Are these two forms of glucose enantiomers or diastereomers?
A beef roast cooked to medium-rare should have an internal temperature of 145Â°F - 150ÂºF after the resting period, and a roast cooked to medium should have an internal temperature of 150Â°F to 160ÂºF. (See the note below). See Beef Doneness for more information on proper cooking temperatures.o not cover the roast and do not add any liquid (liquid is used for braising, not roasting). Allow the beef to roast at 450Â°F for 45 minutes and then begin checking the internal temperature of the meat with a meat thermometer.
Check the internal temperature of the roast as it nears its completion time. Beef, lamb or pork should register between 125 and 130 degrees Fahrenheit for rare, between 130 and 140 degrees for medium rare and about 140 to 145 degrees for medium.Cook poultry to an internal temperature of about 165 degrees Fahrenheit.Depending on how you want the roast done, increase the oven's temperature to 500 degrees about 15 minutes before it reaches its final temperature. Roast it at the higher temperature for another 10 minutes for a browned and crunchier crust.se a Dutch oven or a roasting pan. The key is to allow the meat to cook gradually. Slow cooking is more appropriate for beef, pork and lamb than it is for boneless poultry, though thighs and leg pieces work well with this method.