LYOPHILIZATION METHOD

LYOPHILIZATION METHOD

A method of inducing nucleation of freezing in a material within a chamber is provided. The material to be frozen is initially brought to a temperature near or below a phase transition temperature in an atmosphere within the chamber pressurized above ambient pressure after which the pressure of the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ROBERT REX SEVER, NIGEL GRINTER, MELINDA LEE VERDONE, THEODORE HALL GASTEYER, BALAZS HUNEK
Format: Patent
Sprache:eng ; por
Schlagworte:
BLASTING
DRYING
DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
HEATING
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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Beschreibung
Zusammenfassung:A method of inducing nucleation of freezing in a material within a chamber is provided. The material to be frozen is initially brought to a temperature near or below a phase transition temperature in an atmosphere within the chamber pressurized above ambient pressure after which the pressure of the atmosphere within the chamber proximate the material is decreased in 40 seconds or less or at a pressure rate drop, delta P / delta t, greater than about 0.2 psi (1,38 kPa) per second to uniformly induce nucleation of the phase transition in the material.