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 ?
Similar observation can also be found in the melt endotherm of p-MWNT containing nanocomposites (Fig.
Similar to the data in Figure 8, the 1st scan data exhibit a [T.sub.g], stress relaxation endotherm, and a residual cure exotherm.
Energetic demands are roughly an order of magnitude greater in endotherms relative to ectotherms of the same size (e.g., Humphreys, 1979; Bennet and Ruben, 1979; Hayes, 2010; recently reviewed by Glazier, 2014).
Based on the result, all the endotherm peak is within temperature range at about 50[degrees]C-200[degrees]C.
Hence, the denaturation endotherm does not appear on the DSC cycle for minimally or 'just surface' adsorbed samples.
Thermoanalysis of the polymer revealed a glass transition temperature [T.sub.g] of 4.3[degrees]C, a cold crystallization point [T.sub.c] at 67.2[degrees]C, and two melting endotherms [T.sub.m1] and [T.sub.m2] at 130.2 and 140.6[degrees]C.
According to Bergmann's rule, endotherm (warm blooded) vertebrates living in cooler climates tend to be larger than members of the same genus in warmer climates.
Pure nifedipine, carbamazepine, and ibuprofen exhibit a sharp melting endotherm peaks at 174.76[degrees]C, 192.65[degrees]C, and 74.77[degrees]C, respectively, and corresponding to their melting points and crystalline nature [23].
The DSC curve of psyllium shows a broad endotherm at 70.29[degrees]C with heat of fusion of 181.3 J/g followed by an exotherm at 308.50[degrees]C with heat flow of 240.1 J/g.
After that the sample was held at zero temperature for 5 min and then heated to 190 [degrees]C at the same rate to get an endotherm. Both melting and crystallization parameters were obtained from the exotherms and endotherms.
A broad endotherm was observed around 120[degrees]C irrespective of moulding temperature.
After cooling from 70[degrees]C to -120[degrees]C at 10[degrees]C/ min, the SBO sample exhibited a small endotherm at -77[degrees]C which was immediately followed by a significant crystallization exotherm and two endotherms with peak temperatures of -39 and -25[degrees]C This behavior suggests that the original crystallites formed during the controlled cooling were quite imperfect resulting in a relatively low melting temperature and immediate recrystallization to produce the higher temperature endotherms.

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