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A time-varying effect model for intensive longitudinal data

The carcinogens in cigarette smoke belong to multiple chemical classes, including polycyclic aromatic hydrocarbons (PAHs),N-nitrosamines, aromatic amines, aldehydes, volatile organic hydrocarbons, and metals

Safety Tips When Using an Ozone Generator Although ozone generators are very effective, they must be used carefully

Designed by our friends at Craighill, the life-sized ceramic Talk To Me Party Hand is the only smoking device (or incense burner!) that opens the door to the other side. Each ceramic hand apparently weighs three pounds, sitting at 8.5 inches high, and comes with a black microsuede cover