They may cover all or part of the body and are usually very itchy. 1  Hives usually break out first on the covered areas of the skin such as the trunk and upper parts of the arms and legs.  Wheals appear in batches. Each wheal may last from a few minutes to six hours.
Early years [edit]. Arrhenius was born on February 19, 1859, at Vik (also spelled Wik or Wijk), near Uppsala, Sweden, the son of Svante Gustav and Carolina Thunberg Arrhenius.oday, Arrhenius is best known for his study published in 1896, on the greenhouse effect.
What weâre really looking at here is whatâs known as the Arrhenius equation. Svante August Arrhenius was a Nobel Prize winning Swedish chemist around the turn of the century. He observed that an increase of 18Â° F will about double the rate of the average chemical reaction. And the same holds true in reverse: the colder the temperature, the less the rate of reaction.