SINCE the discovery of the xanthine oxidase of milk by Morgan, Stewart and Hopkins [1922] two main attempts have been made to purify this enzyme further; namely, by Dixon and Thurlow [1924, 1], and later by Sbarsky and Michlin [1925]. Dixon and Thurlow obtained an active and stable oxidase preparation by precipitating the enzyme, together with the caseinogen and fat, by halfsaturation of the mi...

The presence of a serum-activated lipase (lipoprotein lipase) in bovine milk was first reported by Quigley et al. (1958). A similar lipolytic system has been studied in milk of various species where it is assumed to be the predominant lipid-hydrolysing enzyme (Korn, 1962). It was found to be unable to hydrolyse milk triglycerides; its presence in milk has been explained as a result of a penetra...

An enzyme immunoassay (EIA) was developed for detecting Brucella antibodies in milk of cows infected with Brucella abortus. The enzyme immunoassay using heat-killed cells of B. abortus strain 19 was of comparable sensitivity to the Brucella ring test in detecting antibodies in milk of a reference positive control cow experimentally infected with B. abortus strain 2308 and in milk of 16 naturall...

One of the most significant tasks for proteomic research and industrial applications, is the preparation of recyclable enzyme reactor. Herein, a novel recyclable enzyme reactor has been developed based on monodispersed spherical poly(quaternary ammonium ionic liquid)s particles immobilized trypsin. A new quaternary ammonium ionic liquids functional monomer was first synthesized. The ionic l...