Journal of Chemical and Pharmaceutical Research

ABSTRACT: In present investigation an attempt has been made to investigate corrosion rate of mild steel, Tor steel and CRS steel in reinforced concrete. The five concrete block sites have been selected. The factor causing corrosion and conditions of the environment has been studied. Attempt has been made to consider conditions which will help to get greater protection against corrosion problem for industries as well as household articles.   Introduction :   Corrosion is the destructive attack on a metal or a metal alloy by chemical or electrochemical reaction with its environment . Metal and its alloys tend themselves to many engineering application because of their combination of lightness with strength, thermal and electrochemical conductivity, reflectivity and non toxic qualities . Iron is used in the form of stainless steel for making cutlery, hospital and food service equipment. Carbon steel is the most common, cheapest and most versatile metal used in indu...

ABSTRACT: 4-Aminopyrimidine-5-carbaldehyde 1 underwent facile condensation with various aromatic ketone derivatives in the presence of K2CO3 and small catalytic amount of KI in acetone was afforded corresponding 7-Substituted pyrido[2,3-d]pyrimidine derivatives 3a-j. Their chemical structures were characterized using IR, H1 NMR and Mass spectral studies. All the above compounds were screened for anti-microbial activity, anti-oxidant activity and their bioassay showed them to possess significant antimicrobial activity and anti-oxidant activity. Introduction :   For small organic molecules, simple nitrogen-containing heterocycles receive a large amount of attention in the literature, of these heterocycles, the synthesis, reactions and biological activities of pyridine containing molecules stands as an ever expanding area of research in hetero aromatic chemistry. pyrido[2,3-d]pyrimidine heterocycles have received much less attention in the literature, in spite of their ...