Lactase Immobilized on Alumina

Enhanced activity and stability of a-amylase immobilized on alumina

a-amylase was immobilized on alumina via adsorption. The support and the immobilized enzymes were characterized using XRD, IR spectra and N2 adsorption studies. The efficiency of immobilized enzymes for starch hydrolysis was tested in a batch reactor. The effect of two different calcination temperatures on properties of the support as well as on immobilization was studied. From XRD, IR and N2 a...

Studies on the Lactase of Escherichia Coli

A "lactase solution" was prepared from Escherichia coli. The mechanism of its action has been studied and changes in the rate of hydrolysis under various conditions investigated. The hydrolysis of lactose by the enzyme approximates the course of reaction of the integrated Michaelis-Menten equation. One molecule of enzyme combines with one molecule of substrate. E. coli lactase is readily inacti...

Microseparation and stripe wear in alumina-on-alumina hip implants.

The combination of materials that still has highest wear resistance for total hip replacement is ceramic-on-ceramic. However, brittleness is a major concern for ceramics: in vivo and in vitro studies on ceramic hip prostheses correlate microseparation with hip noise, ceramic wear, or ceramic liner damage. Ceramic microseparation can lead to edge load, ceramic head wear, and squeaking. The aim o...

Highly active heterogeneous Fenton catalyst using iron oxide nanoparticles immobilized in alumina coated mesoporous silica.

A highly active heterogeneous Fenton catalyst was fabricated by impregnating iron oxide nanoparticles in alumina coated mesoporous SBA-15 silica.

Alumina-debris-induced osteolysis in contemporary alumina-on-alumina total hip arthroplasty. A case report.