RADIOLOGIST: X-rayted cameraman.
RAFFINOSE is a trisaccharide found in
cottonseed and other plants. Raffinose when broken down into individual sugar
molecules will give glucose, galactose, and fructose.
REFRIGERANT - an agent which
alleviates heat, fever, or thirst.
RESINS are amorphous substances
consisting of the hardened secretions of plants; these secretions may be
volatile oils. Resin is also a term used to indicate organic substances soluble
in ether but not in water.
RHAMNETIN (7-methylquercetin) is a
flavonoid found in belladonna and cloves.
RHAMNOSE is a sugar found in alfalfa,
comfrey, pectin, and senna.
RHEIN is an anthraquinone found in
senna and the rhubarb plant. It has laxative properties.
RNA (Ribonucleic acid) is a nucleic
acid found principally in the nucleolus, microsomes, and mitochondria of cells.
RNA reacts with and carries an activated amino acid to participate in the
manufacture of protein molecules. It takes the place of DNA in certain viruses;
it differs from DNA in that its sugar is ribose and the pyrimidine uracil is
present rather than thymine. The three major forms of RNA are transfer RNA
(tRNA), messenger RNA (mRNA), and ribosomal RNA (rRNA).