Products are categorised into various types supported their relation with microbial growth. There are three sorts of products. • Growth associated products. • Non-Growth associated products. • Mixed mode product formation. In growth associated products, product is made alongside the expansion of the microbial cells and merchandise concentration is nearly directly proportional to microbial rate of growth. Whereas in non-growth associated products, product formation is nowhere related with rate of growth of microbial cells but it’s a function of cell concentration and that we can say that product formation and microbial rate of growth are almost inversely proportional to every other. A journal may be a scholarly publication containing articles written by researchers, professors and other experts. Journals specialise in a selected discipline or field of study. Unlike newspapers and magazines, journals are intended for a tutorial or technical audience, not general readers. Journals are published on a daily basis (monthly, quarterly, etc.) and are sequentially numbered. Each copy may be a n issue; a group of issues makes a volume (usually annually is a separate volume).