Canker sore. In some cases, the exact cause of a canker sore is unknown, but trauma or injury to the mouth or oral soft tissues may be the culprit. Other possible causes are food sensitivities, spicy, salty or acidic foods, vitamin B deficiency, hormonal shifts and stress. Cold sore.
What does xoxo mean? Hugs and kisses or xoxo is a term used for expressing affection or good friendship at the end of a written letter, email or SMS text message.
Xanthine oxidase (XO or XOA) is an enzyme that catalyzes the chain reactions of hypoxanthine oxidizing to xanthine and xanthine oxidizing to uric acid and hydrogen peroxide (H2O2).Oxidation requires the addition of oxygen and water.anthine oxidase is mainly produced and located in the liver. Someone with a deficiency of XO should drink large amounts of water to help the kidneys. People suffering with a kidney stone may experience blood in their urine. When the liver is damaged, the hepatic cells release xanthine oxidase into the blood.