The basic principle for coal preparation is to first liberate the coal particles from the gangue (quartz) and then, by applying different water based techniques, separate the coal particles and gangue particles.
Acetaminophen in the Treatment of Acute Low Back Pain. For low back pain, acetaminophen can be effectively used as an analgesic (or pain killer). Doctor-written article on acetaminophen as a pain reliever for lower back pain.
An oral steroid (e.g., prednisone) is sometimes prescribed for acute episodes of low back pain. Patients are started on a high dose that is gradually reduced over 5 or 6 days. Serious side effects associated with steroid use may include bone loss, impaired wound healing, headache, and others.