Dremel 543 and EZ544 are both carbide cutting wheels for cutting and shaping on woods, fiberglass, plastics and laminates. Do not use them on metals. For 543 the mandrel is included; for EZ544 use the EZ402 Mandrel.
After Domagk published his findings in 1935, doctors found that Prontosil could control many bacterial infections. Subsequently, other researchers developed derivatives based on the Prontosil sulfonamide group. The resulting so-called sulfa drugs revolutionized medicine and saved many thousands of lives.
There is a lot of understandable confusion about the difference between sulfa drugs, sulfites, sulfates and sulfur. Many people are allergic to sulfa drugs and sulfites and thus assume that they have to avoid sulfates and sulfur, also.I will explain the difference between these four substances in this article.llergies to sulfa containing drugs are not unusual. Sulfa drugs actually contain a molecule called sulfonamide. Sulfonamides contain Sulfur, Oxygen, Nitrogen, and Hydrogen. The sulfonamide drugs were the first antimicrobial drugs (antibiotics) These molecules plug up the bacteriaâs ability to reproduce.