You could measure smoking cessation as a person not smoking a cigarette for 1 month, or as a person who has not smoked in a year, or a 50% reduction in the number of cigarettes smoked. Clearly the operational definition of the dependent variable is an important step in the design of the study.Some other health related conceptual variables that have many operational definitions: intelligence, fitness, health, quality of life.ou could measure smoking cessation as a person not smoking a cigarette for 1 month, or as a person who has not smoked in a year, or a 50% reduction in the number of cigarettes smoked. Clearly the operational definition of the dependent variable is an important step in the design of the study.
The majority of influenza vaccines distributed in the United States contain thimerosal as a preservative. However, an increasing amount is thimerosal-free. While the multiple dose vials still have thimerosal to prevent bacterial growth, the single-dose preparations do not.The amount of influenza vaccine that is thimerosal-free is growing every year. Thimerosal contains ethyl mercury. 2  This is a different chemical compound than mercury found in the environment (methylmercury). 3  Thimerosal has been used as a preservative since the 1930s to prevent bacterial growth in vials containing multiple doses of vaccine and other medical products.
Bactrim Dosage. Bactrim tablets are white and round and contain 80 milligrams (mg) of trimethoprim and 400 mg of sulfamethoxazole. Bactrim DS tablets are white and oval, containing 160 mg of trimethoprim and 800 mg of sulfamethoxazole.regnancy and Bactrim. Bactrim may harm a developing fetus. The drug has a warning that if you take it when you're pregnant, it can cause such birth defects as urinary tract defects, cleft lip or palate, or club feet. Before taking Bactrim, tell your doctor if you are pregnant or may get pregnant.