You may use interjections in casual and in creative writing. You should not use interjections in formal writing, like book reports and research papers. You can use a noun, a verb, or an adverb as an interjection. Noun as an interjection: 1  Foolishness! 2  Your dog is not smarter than my dog! 3  Clap! 4  He deserves some applause for that performance.
Here is a look at the composition of a compact disc or what CDs are made of. Answer: A compact disc or CD is a form of digital media. It is an optical device which can be encoded with digital data. When you examine a CD you can tell it is mainly plastic. In fact, a CD is almost pure polycarbonate plastic.
Casting a vertical slab gel. Vertical gels are cast in a cassette made up of two glass plates separated by spacers which run along the sides of the plates. The bottom of the cassette is sealed by some temporary means (tape, agarose, or a gasket).