Journal article
Specific heat of polyglycine I and II in the temperature interval 150–375 K
Thermochimica acta, v 48(1), pp 51-59
1981
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Abstract
The specific heat,
C, of polyglycine I (β-sheet) and II (3
I helix) have been determined in the temperature interval 150–375 K by differential scanning calorimetry. The apparatus repeated National Bureau of Standards' adiabatic calorimetry specific heat measurements on sapphire to within 2% and on high density polyethylene to within 5%. The conformation of the lyophilized polyglycine samples was confirmed by IR spectroscopy. The specific heat of polyglycine is fitted by the following expressions to within ± 7% experimentally: polyglycine I:
C = 37.744 ± 0.218
T − 2.333 × 10
−6
T
2 (σ = 3.3) J mole
−1 K
−1 polyglycine II:
C = 57.598 + 0.05
T + 2.357 × 10
−4
T
2 (σ = 2.5) J mole
−1 K
−1 The specific heat of polyglycine I and II differs markedly and unexpectedly from that of poly-L-alanine in the α-helix and β-sheet forms. It is hoped that these results will encourage theoretical calculations.
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Details
- Title
- Specific heat of polyglycine I and II in the temperature interval 150–375 K
- Creators
- Leonard Finegold - Drexel UniversityPrasanna K. Kumar - Drexel University
- Publication Details
- Thermochimica acta, v 48(1), pp 51-59
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]
- Web of Science ID
- WOS:A1981MH27300005
- Scopus ID
- 2-s2.0-24444439426
- Other Identifier
- 991019174902104721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Analytical
- Chemistry, Physical
- Thermodynamics