Darstellung und Charakterisierung eines Lipoproteins mit Antigenwirksamkeit im Lp-System

Zusammenfassung Unter Anwendung verfeinerter Trennverfahren wurde das -Lp(a+)-Lipoprotein des menschlichen Serums in immunologisch und elektrophoretisch reiner Form dargestellt. Es wurde hinsichtlich seiner Lipidzusammensetzung analysiert und mit ebenfalls immunologisch und elektrophoretisch rein erhaltenen -Lp(a-)- und ₁-Lipoproteinen verglichen.

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Separation and characterization of a lipoprotein with antigenic activity in the Lp-system

Summary Through application of refined separation techniques the -Lp(a+)-lipoprotein of human serum was characterized in an immunologically and electrophoretically pure form. It was analyzed with regard to its lipid-composition and compared to likewise electrophoretically and immunologically pure -Lp(a-)- and ₁-lipoproteins.

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Untersuchung mit Unterstützung durch die Deutsche Forschungsgemeinschaft     

Examination of Market Foods for Coliform Organisms

Food specimens (490) in nine categories were examined for total aerobic plate count and numbers and types of coliform organisms, including the enteropathogenic Escherichia coli (EEC). The total counts were compared with various suggested standards, and a limit of 100,000/g appeared to be a realistic goal, except for certain food types with a high level of natural flora. Plate counts in VRB were compared to counts obtained by isolation by enrichment in LST Broth, and the latter method produced a higher percentage of isolations. The presence of E. coli was determined by use of EC Medium incubated at 44.5 +/- 0.1 C. Only 40.4% of the positive EC tubes, however, contained E. coli. It appeared that a limit of 10 coliform organisms per g as a suggested standard could be met with several types of foods. Isolation of EEC was obtained only three times, or in 0.6% of the specimens.