An improved microscope stage for direct observation of freezing and freeze drying.

作者: Steven L. Nail , Lih‐Min Her , Christopher P. B. Proffitt , Lisa L. Nail

DOI: 10.1023/A:1018972428858

关键词: MicroscopeEutectic systemVideo microscopyHeat sinkThermodynamicsThermoelectric effectFreeze-dryingStage (hydrology)Thermoelectric coolingComposite materialChemistry

摘要: A microscope stage for observation of freezing and freeze drying is described. The uses thermoelectric (Peltier) heaters configured in two stages, with circulating fluid as a heat sink on the high temperature side. Lowest attainable sample about −47°C. Principal advantages this system are closed-loop control temperature, rapid response to changes set point, improved documentation experiments by use video recorder character generator which allows display identity temperature. Accuracy measuring field view was validated comparing observed values eutectic melting published series solutes temperatures range from −2°C −32°C. Good agreement obtained throughout range.

参考文章(6)
M.J. Pikal, S. Shah, D. Senior, J.E. Lang, Physical Chemistry of Freeze-drying: Measurement of Sublimation Rates for Frozen Aqueous Solutions by a Microbalance Technique Journal of Pharmaceutical Sciences. ,vol. 72, pp. 635- 650 ,(1983) , 10.1002/JPS.2600720614
MELVIN FREEDMAN, JAMES H. WHITTAM, HENRI L. ROSANO, TEMPERATURE GRADIENT FREEZE‐DRYING MICROSCOPE STAGE Journal of Food Science. ,vol. 37, pp. 492- 493 ,(1972) , 10.1111/J.1365-2621.1972.TB02672.X
J. M. FLINK, F. GEJL-HANSEN, M. KAREL, MICROSCOPIC INVESTIGATIONS OF THE FREEZE DRYING OF VOLATILE‐CONTAINING MODEL FOOD SOLUTIONS Journal of Food Science. ,vol. 38, pp. 1174- 1178 ,(1973) , 10.1111/J.1365-2621.1973.TB07231.X
James M. Flink, Frederik Gejl‐Hansen, Two simple freeze drying microscope stages Review of Scientific Instruments. ,vol. 49, pp. 269- 271 ,(1978) , 10.1063/1.1135387
M. Kochs, C. Koerber, P. Schwindke, A microscope stage for the dynamic observation of freezing and freeze drying in solutions and cell suspensions Cryo letters. ,vol. 10, pp. 401- 420 ,(1989)