PTFE flasks used in digestion underwent a rigorous cleaning process consisting of washing with detergent, a 24 h soak in 5 M HNO3, rinsing with detergent, distilled water, and deionized water, followed by oven-drying to prevent cross-contamination
Alternatives to cigarettes typically eliminate the combustion of tobacco, which is the primary cause of smoking-related disease
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Under their own weight and controlled humidity, the tobacco naturally heats and that heat is watched carefully
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