According to authors Jeanne W. Ross and David F. Feeny in their 1999 study, The Evolving Role of the CIO, first-generation IT leaders were typically senior or middle managers in what businesses called the electronic data processing department or, later, the information systems (IS) department.
Penicillin (PCN or pen) is a group of antibiotics which include penicillin G (intravenous use), penicillin V (oral use), procaine penicillin, and benzathine penicillin (intramuscular use).They are derived from Penicillium fungi.enicillin (PCN or pen) is a group of antibiotics which include penicillin G (intravenous use), penicillin V (oral use), procaine penicillin, and benzathine penicillin (intramuscular use).
Tipper and Strominger (2) hypoth-. esized that 1) penicillin is a substrate or transition state analog. of the acyl-D-Ala-D-Ala terminus of the pentapeptide side. chain of uncross-linked peptidoglycan and that 2) the highly. reactive p-lactam of the antibiotic irreversibly acylates the.