Apparatus consists of thermocouple connected to semiconductor reference junction. Junction is connected to amplifier that boosts signal by 1,000. High-level signal is displayed on recorder and fed into second amplifier where it is compared with signal from potentiometer of programmed dc reference in bag-temperature programer. Difference in signals indicates output voltage. Remaining circuitry provides zero-phase, time-proportion control of heaters such that heater power is directly proportional to error signal.


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    Titel :

    Controlled freezing of biological samples


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    01.06.1978



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Controlled Temperature Gradient Improves Freezing Alloy

    Schmidt, Deborah / Alter, Wendy S. / Hamilton, William D. | NTRS | 1991


    FREEZING-INDUCED FLUID-MATRIX INTERACTION IN BIOLOGICAL TISSUE

    Han, B. | British Library Conference Proceedings | 2007


    Storage of biological samples.

    Fraser, T. M. | NTRS | 1968


    Storage of biological samples

    Fraser, T. M. | TIBKAT | 1967


    Ultrafast UV pulses excite biological samples

    British Library Online Contents | 1997