Vitamin E and Alzheimer's Risk. A second study in the July issue of the Archives of Neurology shows that eating foods rich in vitamin E may help lower risks of developing dementia and Alzheimer's disease.
Ribose and Deoxyribose. The 5-carbon sugars ribose and deoxyribose are important components of nucleotides, and are found in RNA and DNA, respectively. The sugars found in nucleic acids are pentose sugars; a pentose sugar has five carbon atoms. A combination of a base and a sugar is called a nucleoside. Ribose, found in RNA, is a normal sugar, with one oxygen atom attached to each carbon atom. Deoxyribose, found in DNA, is a modified sugar, lacking one oxygen atom (hence the name deoxy).
The sugar that is part of a nucleotide is a 5-carbon atom sugar in its ring form. It will either be ribose in RNA or deoxyribose in DNA. The deoxy simply means that the ribose molecule has lost an oxygen. That missing oxygen happens to be from the second carbon, so the more correct name for deoxyribose is 2-deoxyribose.