[ÉªËvan pÊ²ÉªËtrovÊ²ÉªtÉ ËpavlÉf]. ; 26 September [ O.S. 14 September] 1849 â 27 February 1936) was a Russian physiologist known primarily for his work in classical conditioning. From his childhood days Pavlov demonstrated intellectual brilliance along with an unusual energy which he named the instinct for research.
Both pink and red grapefruit are a bit higher in calories than white grapefruit. One whole pink or red grapefruit, raw, has about 104 calories, while one whole white grapefruit, raw, has about 78, according to the USDA National Nutrient Database. These calorie counts are for a medium grapefruit.
Grapefruit Vitamin C Content. One serving of grapefruit is half of a medium grapefruit, which is 4 inches in diameter. Each serving contains 44 milligrams of vitamin C, which is 73 percent of the daily value of 60 milligrams for people following a 2,000-calorie diet. If you eat an entire grapefruit, you will have consumed the recommended amount of vitamin C for the day. This makes grapefruit an excellent source of vitamin C.