Occupational Exposure Limits. The amount of toluene that a worker breathes over a work day is determined by the concentration in air, and the length of time the worker is in that atmosphere.Enforceable limits in the United States for the concentration in air have been established by Federal OSHA.he amount of toluene that a worker breathes over a work day is determined by the concentration in air, and the length of time the worker is in that atmosphere.
At night, your mouth is much less active, which allows bacteria more time to grow without being mechanicalyl sloughed off. Many years ago my orthodontist told me that it was most important to brush your teeth before going to sleep (I guess either for the night, or for a nap). Saliva production is down, and if you happen to sleep with your mouth gaping open, your teeth dry out and don't have that protective layer of saliva.
Why should I brush my teeth in the morning? My teeth are just going to get dirty again when I eat breakfast 5 minutes later. Plus, I've already done an extensive cleaning (floss, brush, mouthwash) the night before. My teeth should not be getting dirtier as I sleep. I've heard people say their breakfast tastes better after brushing theire teeth. I've never experienced bad taste from not brushing.