1. The protective bioactivity of punicalagin, a high molecular weight polyphenol isolated from pomegranate fruit pith and Carpellary membrane, against oxidative damages to lipids, amino acids constituting the proteins, and guanosine as a model for DNA has been investigated

2. 1-Methyladenine, deoxyadenosine (deoxy-A), deoxyadenosine-5′-monophosphate (deoxy-5′-AMP), adenylyl-(3′→5′)-adenosine (APA) and adenylyl-(3′→5′)-guanosine (APG) were studied at various pH-values by differential pulse polarography at the dropping mercury electrode.

3. Acyclovir is a synthetic analog of the purine nucleoside, guanosine, with potent antiviral activity against herpes simplex viruses type 1 and 2, varicella-zoster virus and other viruses of the herpesvirus family.After conversion in vivo to the active metabolite Acyclovir triphosphate by viral thymidine kinase, Acyclovir competitively inhibits viral DNA polymerase by incorporating into the