Low-temperature microscopic differential scanning calorimetry system body apparatus

Abstract

The invention discloses a main device of a cryogenic micro-differential scanning calorimetry system which comprises a cryostage, a sample support and a reference support; the cryostage is a cylinder, an annular nitrogen channel is arranged inside the cryostage, and the cyrostage is provided with a cold nitrogen inlet and a cold nitrogen outlet; two symmetrical cavities are opened along the central axis line of the cryostage, the upper half part of each cavity is cylindrical, the lower half part of each is rectangular, the sample support or the reference support is arranged in the rectangular cavities and fixed by a rectangular brass ring; cold nitrogen carries out the heat exchange with the cryostage after entering the annular channel, the cold energy is transferred to the sample and the reference support, thereby completing the cooling of the sample and a reference substance; the sample and the reference support adopt quartz glass as substrates, grid-shaped thin-film thermocouples are sputtered on the quartz substrates; the back surfaces of the quartz substrates are plated with transparent tin oxide heating thin films; the outsides of the thin-film thermocouples and the tin oxide heating thin films are respectively plated with SiO2 protective layers; the sample and the reference support are geometrically symmetrical and same in weight. The main device of the cryogenic micro-differential scanning calorimetry system can simultaneously obtain micro-images of the sample and various physical and chemical parameters during the temperature increase and the temperature decrease processes.

Description

technical field [0001] The invention relates to a main device of a combined test system of a cryogenic biological microscope and a differential scanning calorimetry (Differential scanning calorimetry, DSC). Background technique [0002] Low temperature biological microscope and differential scanning calorimetry (DSC) are two very important tools in low temperature biology and food research. Low-temperature biological microscope can directly observe and record the morphological changes of organisms in the process of heating and cooling; while DSC can obtain physical and chemical data in this process. The real-time morphological and physicochemical data analysis of organisms is very important for cryobiology, but the usual DSC test and cryomicroscope test are done separately, although the test parameters can be set to the same value, but because they are not "the same event ", unable to unify the results in time and space; especially with the development of food and biomateri...

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Problems solved by technology

[0003] In order to overcome the shortcomings in the prior art that the DSC test and the low-temperature microscope test are performed separately, the results cannot be unified in time and space, and the test results have low precision and are likely to cause misjudgment. The present invention proposes a low-temperature A new low-temperature micro-DSC system combining microscopy techniques and differential scanning calorimetry

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