endotherm


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Related to endotherm: homeotherm

endotherm

[′en·də‚thərm]
(physical chemistry)
In differential thermal analysis, a graph of the temperature difference between a sample compound and a thermally inert reference compound (commonly aluminum oxide) as the substances are simultaneously heated to elevated temperatures at a predetermined rate, and the sample compound undergoes endothermal or exothermal processes.
(physiology)
An animal that produces enough heat from its own metabolism and employs devices to retard heat loss so that it is able to keep its body temperature higher than that of its environment.
References in periodicals archive ?
Exotherms are characterized by the presence of two crystallization peaks at 61-62 [degrees]C and 98 [degrees]C, whereas the endotherm has only one broad melting peak at 110-111 [degrees]C.
However, HP-[beta]-CD exhibits a broad endotherm in temperature of around 150[degrees]C and a sharp endotherm in temperature of around 230[degrees]C.
9 contains a small endotherm at 103[degrees]C and a small melt endotherm at 235[degrees]C for the MEKO -blocked isocyanate, with an exotherm maximum at 258[degrees]C.
In figure 3b, the lower ethylene content copolymer exhibits a prominent melting peak at ~98[degrees]C, corresponding to primary crystallites, and a weak endotherm at ~50[degrees]C, corresponding to secondary crystallites.
Another observation reported by Wissbrun, et al, is that the thermotropic nature of LCPs allows them to flow at temperatures below their DSC endotherm peak.
The lowest temperature endotherm (7)), which is located at temperature range ca.
In contrast to this, however, the energy of the crystalline melting endotherm shows (as expected) the AR/DR pair to have the most crystallinity and the CR/FR pair to have the least.
3b) for individual polymers exhibit only one main peak, corresponding to their crystallization and melting points, respectively, excepting for sPP melting endotherm which shows two peaks.
Annealing effects observable from DSC experiments are manifested as changes in the shape of the melting endotherm, in location of the peak melting temperature, and in the area under the endotherm peak.
More evidence of morpholine reactivity was seen in DSC analyses of silica-DTDM mixtures where a 10 [degrees] C shift in the melting endotherm of the mixture - which did not occur in an HAF control - indicated a probable reaction (figure 6).
With ageing the melting endotherm profile becomes longer and sharper; this suggests a narrower crystal size distribution [43-45].
However, rings in the bone suggest that Troodon stopped growing occasionally - more like an ectotherm than an endotherm.

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