Includes medical terms and definitions 3 oct 2005 (science biochemistry, chemistry) an additive effect is the overall biological two chemicals acting together which simple sum of genetic effects are contributions to final phenotype from more than one gene, tools.
Therefore, you want your refrigerator to be cold, but not so cold that it freezes things. The preferred temperature is somewhere between 35 and 38 degrees F (1.7 to 3.3 degrees C). Anything higher and foods will spoil too quickly (it also presents food poisoning problems, as described in several of the links below).
The best temperature for a refrigerator is at or below 40 degrees Fahrenheit, according to the United States Food and Drug Administration. Maintaining an appropriate temperature in a refrigerator reduces the potential for the growth of food-borne microorganisms, including Salmonella, listeria, C. botulinum and E. coli.