“Antimicrobial and antifungal screening of piperidone derivatives with pyrazolone substituents”. This project has been carried out by Mr. Parimal M. Prajapati during M.Pharm. degree course (2008-2010) at Shri Sarvajanik Pharmacy College, Hemchandracharya North Gujarat University, Mehsana, Gujarat under the guidance of Prof. Dr. Dhrubo Jyoti Sen. At present he is working as an Assistant Professor at Department of Pharmaceutical Chemistry, I. K. Patel College of Pharmaceutical Education and Research, “Samarth Campus”, Opp. Sabar Dairy, Hajipur, Himatnagar-383120, Gujarat, India. The authors are thankful to the quality assurance department of Shri Sarvajanik Pharmacy College for UV, FT-IR datas of the synthesised compounds and Oxygen Healthcare, Ahmedabad for Mass spectral datas and Panjab University, Chandigarh for CHN% and NMR datas. The authors are thankful to the microbiology laboratory of Shri Sarvajanik Pharmacy College for antimicrobial/antifungal growth, culture and screening.