Making Medicines. Not long ago, if you were diabetic, the insulin your doctor prescribed would have come from a pig. If you required human growth hormone, it would have come from human cadavers, a source that is costly, not to mention a little creepy. Now, these and other medicines can be made by specially-modified bacteria, called transgenic bacteria. These single-celled organisms have foreign genes along side their own DNA.
publication. n. 1. (Journalism & Publishing) the act or process of publishing a printed work. 2. (Journalism & Publishing) any printed work offered for sale or distribution. 3. the act or an instance of making information public. 4. (Law) the act of disseminating defamatory matter, esp by communicating it to a third person.
Periodical is a term used to describe any publication that is published multiple times (periodically). Periodicals include materials such as popular magazines, scholarly journals, and newspapers. It is important to understand the difference between a popular and a scholarly periodical. When you are doing research, most of your sources should be scholarly. Often popular periodicals are called magazines and scholarly periodicals are called journals.