Distance learning, also called online education, is very attractive to students, especially who want to continue education and work in field. At University of Pittsburgh-Bradford, 4 students are enrolled exclusively in online cources and 469 students are enrolled in some online courses based on 2015-2016 enrollment data.
Home Remedies for Whiter Teeth. Some people still prefer the age-old home remedy of baking soda and a toothbrush to gently whiten teeth at home. Also, some foods such as celery, apples, pears, and carrots trigger lots of saliva, which helps wash away food debris on your teeth.
Most tooth whiteners use one of two chemical agents: carbamide peroxide or hydrogen peroxide (the same stuff that will bleach your hair). When used in the mouth, carbamide peroxide breaks down into hydrogen peroxide and urea, with hydrogen peroxide being the active whitening ingredient.