Products area unit categorized into numerous varieties supported their relation with microbic growth. There area unit 3 styles of product. the primary is Growth associated product then followed by Non-Growth associated product and Mixed mode product formation. In growth associated product, product is made along side the expansion of the microbic cells and merchandise concentration is sort of directly proportional to microbic rate. Whereas in non-growth associated product, product formation is obscurity connected with rate of microbic cells however its a perform of cell concentration and that we will say that product formation and microbic rate area unit virtually reciprocally proportional to every different. however with third class product formation may be a combination of each microbic cell concentration and microbic rate. A journal may be a periodical publication supposed to additional progress of science, sometimes by reportage new analysis. Most journals area unit extremely specialised, though a number of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a good vary of scientific fields. Journals contain articles that peer reviewed, in a trial to confirm that articles meet the journal's standards of quality, and scientific validity. every such journal article becomes a part of the permanent scientific record.