Design of an apparatus with controlled rates of temperature change for use in cold tolerance tests of conifers Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/ng451k72n

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  • An apparatus was designed to permit freezing tests of needles and other tissue parts from coniferous trees under controlled rates of temperature change with time. The design is based on the principle of a balanced system of refrigeration demand and heat input to achieve a steady temperature state. The apparatus permits the operator to decrease temperatures from 0°C to -40°C at rates of 1, 2, 3, or 4°C per hour, to hold temperatures at the desired freezing level from 1 to 24 hours, and to increase to 0°C at rates of 1, 2, 3, or 4°C per hour. Temperatures achieved within the sample tubes are accurate to within ± 0. 9°C of the expected temperature.
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  • Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 Grayscale), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2009-02-05T15:15:27Z (GMT) No. of bitstreams: 1 Wessell_William_James_1968.pdf: 1492983 bytes, checksum: d4d84e31c16b9d4e40ff7eb3d8a1c558 (MD5)
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  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2009-02-05T15:17:38Z (GMT) No. of bitstreams: 1 Wessell_William_James_1968.pdf: 1492983 bytes, checksum: d4d84e31c16b9d4e40ff7eb3d8a1c558 (MD5)
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