Cooking at a constant oven temperature of 300Â°F (160Â°C), a 5- to 8-lb standing rib roast will take 17-19 minutes per pound for rare, 20-22 for medium rare, 23-25 minutes for medium, and 27-30 minutes for well done.f you roast at 325Â°F (160Â°C), subtract 2 minutes or so per pound. If the roast is refrigerated just before going into the oven, add 2 or 3 minutes per pound. More: Set the roast out an hour or so before putting it in the oven.
The causes of schizophrenia include environmental and genetic factors. Possible environmental factors include being raised in a city, cannabis use, certain infections, parental age, and poor nutrition during pregnancy. Genetic factors include a variety of common and rare genetic variants.
What causes personality disorders? Research suggests that genetics, abuse and other factors contribute to the development of obsessive-compulsive, narcissistic or other personality disorders. In the past, some believed that people with personality disorders were just lazy or even evil. Genetics. Researchers are beginning to identify some possible genetic factors behind personality disorders. One team, for instance, has identified a malfunctioning gene that may be a factor in obsessive-compulsive disorder.