Liquid Dosage
From oral vaccines to immune-modulators and offering a broad range of applications in biotechnology and pharmaceutical research, development and analysis, bacterial lysates are widely used in the life science industries. Different methods can be used to prepare cell lysates from Escherichia coli (E. coli) cells, for example, including sonication, homogenization, enzymatic lysis and freezing/grinding.
Homogenizers, however, are the most commonly used devices to lyse large quantities of bacteria. A cell suspension is pumped through the minute orifice of a homogenizing valve at high pressure; this is followed by the sudden release of the pressure on the suspension, resulting in an instant expansion that provides the turbulence and liquid shear — combined with the high pressure — that breaks the cells.
The main disruptive factor in this process is the pressure applied to the sample and the subsequent pressure drop across the valve. This provides the impact and the shear stress, making the cells break in proportion to the operating pressure.
Compared with other methods, homogenization is both convenient and efficient, offering higher percentage cell disruption rates. Modern GEA homogenizers are able to work continuously, enabling large quantities of cells to be processed at high operational pressures, which eliminates the need to add deoxyribonuclease (DNase) to the cell suspension.
Suggested pressures for typical applications are 600–1000 bar with a single stage homogenizer; multiple passes (2–3) are generally required to achieve adequate lysis. It should be noted that high processing pressures result in a rise in operating temperatures. Cells should, therefore, be cooled (4 °C) prior to use to avoid inactivating proteins by foaming.
Fermenters, separators, decanters and cross-flow filtration technology for the gentle treatment of fragile cell cultures are also available from GEA. We understand that the careful treatment of living micro-organisms, sterility and efficiency are prerequisites to economical, reliable and efficient processing.
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Aseptic valves face exceptionally high demands within UltraClean and Aseptic processes. You can be assured that they all provide highest quality in terms of hygienic design and sustainability.
Innovative CIP-Konzepte von GEA erfüllen umfassende hohe Normen. Unsere Experten garantieren die Produktsicherheit an jeder Stelle des Prozesses. Jede Aktualisierung wird an die individuellen lokalen Bedingungen und Anforderungen der Kunden angepasst und führt zu erheblichen Einsparungen.
GEA Hilge offers a versatile range of centrifugal and positive displacement pumps for a wide variety of sensitive applications in the beverage, food and pharmaceutical industries.
Die GEA Kompressionsblöcke sind der pulsierende Kern der Homogenisierungsanlagen, da sie die Homogenisierung aktivieren, indem sie das Produkt mit hohem Druck pumpen, bis es innerhalb des Homogenisierventils zu fließen beginnt.
Mit dem GEA kytero 10 steht Forschenden und Entwicklern in der Biopharma-, Lebensmittel- und New Food-Industrie nun die neueste Generation eines leistungsstarken Beschleunigers zur Seite.
Das Leben von Michele Schneider nahm eine unerwartete Wendung, als sie ihren Ehemann Virlei heiratete, einen jungen, ambitionierten Milchviehhalter, und gemeinsam mit ihm den Milchviehbetrieb „Fazenda Inovação Schneider Milk“ in Brasilien gründete. Als Quereinsteigerin in der Milchviehhaltung entdeckte Michele rasch ihre Leidenschaft für die Tiere und die tägliche Arbeit auf dem Hof. Mit dieser Begeisterung wuchs jedoch auch ihr Arbeitspensum.
GEA unterstützt Kunden beim Testen und Skalieren alternativer Eiprodukte und Zutaten, die durch Präzisionsfermentation hergestellt werden.