What's the difference between cooling and devitrification?

Cooling


Definition:

  • (p. pr. & vb. n.) of Cool
  • (p.a.) Adapted to cool and refresh; allaying heat.

Example Sentences:

  • (1) Do [MPs] remember the madness of those advertisements that talked of the cool fresh mountain air of menthol cigarettes?
  • (2) "In a sea of bubblegum-cute popsters, Sistar stand out for their cool and sexy image," says Scobie.
  • (3) The fact that proteolytic activity could be detected within 2 days at 7 degrees C is significant, since bulk cooled milk is normally held for 3 to 4 days at temperatures between 4 and 7 degrees C at farms or factories prior to processing.
  • (4) The rise of the membrane resistance during cooling was unaffected.
  • (5) Cooling of the necrotic limb with the application of a tourniquet and general nonoperative treatment were conducted in preparation for amputation.
  • (6) A study was carried out to evaluate the effects of direct cooling on the exocrine pancreas.
  • (7) Day-0 rabbits kept for 1 h in a warm (41 degrees C), neutral 39 degrees C) or cool (28 degrees C) environment selected a different TE at 39.8, 39.5 and 37.3 degrees C, giving colonic temperatures (TC) of 40.8, 39.9 and 37.7 degrees C, respectively.
  • (8) Single postganglionic neurones to hairy skin and hairless skin of the hindleg were investigated on spinal cord heating and spinal cord cooling in chloralose anesthetized cats.
  • (9) During suction a flow of cold, dry room air replaces the warm, moist cavity air, causing cooling both directly and by vaporization of water.
  • (10) The conformational similarity between tubules, sheets, and the dry powder is corroborated by calorimetry, which reveals a cooling exotherm at the same temperature where tubules form upon cooling hydrated sheets.
  • (11) The mechanism of action of cooling was investigated.
  • (12) There was a best negative correlation between latencies (P27, P40 and the interpeak latency between P40 and P27 (P40-P27)) and nasopharyngeal temperature, but no correlation was found between latencies and plantar temperature during cooling and rewarming (27-37 degrees C) with cardiopulmonary bypass.
  • (13) Breath was passed through a cooled loop of alumina to adsorb, concentrate, and release, on heating, pentane.
  • (14) Napthine chose not to directly criticise Tony Abbott – it’s not his style – but the coolness was clear.
  • (15) It would appear that there was airborne spread of the organism from these cooling water systems which had not received conventional treatment to inhibit corrosion and organic growth.
  • (16) Observed proliferations of E. coli inocula in cooling cartons of product were compared with the proliferations calculated from temperature histories obtained from sites close to inocula.
  • (17) Recent experiments involving cooling of the human arm are then described.
  • (18) But Matt Collins of Exeter University said it was unlikely to cause an absolute cooling: "It could offset some of the warming, but really the greenhouse gas signal wins over the AMOC.
  • (19) To examine the effects of focally cooling three areas (rostral, intermediate, and caudal) of the ventral medullary surface (VMS) on respiratory oscillations in cervical sympathetic and phrenic nerve activity, 12 cats were anesthetized, vagotomized, paralyzed, and artificially ventilated with 7% CO2 in O2.
  • (20) The other method allowed the castings to bench cool to room temperature.

Devitrification


Definition:

  • (n.) The act or process of devitrifying, or the state of being devitrified. Specifically, the conversion of molten glassy matter into a stony mass by slow cooling, the result being the formation of crystallites, microbites, etc., in the glassy base, which are then called devitrification products.

Example Sentences:

  • (1) This suggests that the devitrification occurring during the use of these materials in high-temperature environments will not necessarily enhance their adverse biological activities despite the production of one phase of crystalline silica.
  • (2) Devitrification (ice formation during warming) is one of the primary obstacles to successful organ vitrification (solidification without ice formation).
  • (3) The fibres were examined in the 'as-manufactured' state and after heating at 1200 and 1400 degrees C. Devitrification of the fibres at 1200 degrees C probably gave mullite crystals on the surface and caused the formation of the high-temperature form of cristobalite and, in zirconia grade fibres, the high-temperature, tetragonal form of zirconia as well.
  • (4) The highest heating rates we observed using catheters occurred at temperatures ranging from about -70 to -40 degrees C, the temperature zone where devitrification usually appears in unstable solutions during slow warming.
  • (5) Biological data showed that this devitrification was associated with severe loss of cell function.
  • (6) This, together with the RGA results, suggests the absence of devitrification or ice crystal growth during the drying procedure.
  • (7) Of particular note is the anomalous shift in devitrification temperature (Td) to lower temperatures following increased time of annealing at sub-Tg temperatures.
  • (8) The purpose of the present studies was to define the devitrification process: to determine nucleation rates, ice-crystal growth rates, and the distribution of ice-crystal size and to evaluate the applicability of existing quantitative models of these processes which have successfully approximated the behavior of other aqueous systems.
  • (9) Very high rates of survival (77-89%) of oocytes exposed to the cryoprotectant media, but without the vitrification, together with extreme variability in results between straws in the vitrified groups, suggest that losses in viability during vitrification may result from ice damage during devitrification of the medium.
  • (10) Devitrification is a major problem which must be overcome for successful organ cryopreservation.
  • (11) However, if these cell suspensions were warmed rapidly to -70 degrees C and then held for 5 min, allowing devitrification to occur, the preparation contained significant amounts of both intra- and extracellular ice.
  • (12) Results obtained indicate that drying is complete below the devitrification temperature of amorphous phase tissue water.
  • (13) It appears that it should be possible to warm vitrified rabbit kidneys rapidly enough under high-pressure conditions to protect them from devitrification.
  • (14) As a result of these studies we concluded that: intracellular freezing is lethal, but avoidance of freezing during fast cooling is not sufficient to provide complete protection; a subtle freezing injury in the cryoprotected monocytes can be correlated with a measurable increase in devitrification on warming; and the cell contents form more stable glasses than the Hanks' balanced salt solution with fetal calf serum used as the extracellular medium.
  • (15) In both cases, high survival requires that subsequent warming be rapid, to prevent recrystallization or devitrification.
  • (16) A systematic study of the errors of low-temperature recording of kinetics of the cytochrome oxidase-CO reaction had identified the classic devitrification process of Keilin & Hartree [(1950) Nature (London)165, 504-505].
  • (17) Devitrification can be initiated on fracture planes and on bubbles, but the focus of attention here is on devitrification by ordinary heterogeneous and homogeneous mechanisms, which are the most relevant for organ preservation by vitrification.
  • (18) An apparatus has been produced that can remove amorphous phase tissue water via molecular distillation without devitrification or rehydration.
  • (19) Whether corneas can be cooled fast enough in these solutions to achieve vitrification and warmed fast enough to avoid devitrification remains to be determined.
  • (20) Glass transitions, devitrification, recrystallization and melting behaviour of aqueous solutions of polyvinylpyrrolidone, hydroxyethyl starch and dextran have been established.

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