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.
For instance, methanol, CH3OH, has an OH, but the OH is preceded by CH3, which is not a metal, so this is not an Arrhenius base. Here are some examples of Arrhenius bases (the hydroxide ion is preceded by metals). There are substances that are classified as bases, but they are not Arrhenius bases.