Parvez Hassan

Antibacterial activity of Alangium salviifolium flowers

The methanol extract of Alangium salviifolium flowers showed a wide spectrum of antibacterial activity against both gram-positive and gram-negative bacteria.

Isolation, purification and characterization of three lectins from ant eggs (Oecophylla smaragdina fabr.)

Abstract Three lectins have been isolated from an extract of ant egg and purified by gel filtration on Sephadex G-75 of the 100% ammonium sulfate fraction from the crude extract, followed by ion-exchange chromatography on DEAE-cellulose. All the lectins were homogeneous as judged by polyacrylamide gel electrophoresis. The molecular weights of the lectins, AEL-I, AEL-II, and AEL-III, as estimated by gel filtration, were 195,000, 105,500, and 84,000. All the lectins were found to be composed of four sub-units of unequal sizes, and are glycoproteins with a neutral sugar content of 3.0–7.5%. The lectins agglutinated rat red blood-cells; in a hapten-inhibition study, D -galactose was found to be a better inhibitor for AEL-I and AEL-II whereas D -mannose was a better inhibitor for AEL-III.