Heat capacities of l-histidine, l-phenylalanine, l-proline, l-tryptophan and l-tyrosine

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F21%3A43922435" target="_blank" >RIV/60461373:22340/21:43922435 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22810/21:43922435

Result on the web

<a href="https://doi.org/10.3390/molecules26144298" target="_blank" >https://doi.org/10.3390/molecules26144298</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/molecules26144298" target="_blank" >10.3390/molecules26144298</a>

Result language

angličtina

Original language name

Heat capacities of l-histidine, l-phenylalanine, l-proline, l-tryptophan and l-tyrosine

Original language description

In an effort to establish reliable thermodynamic data for proteinogenic amino acids, heat capacities for L-histidine (CAS RN: 71-00-1), L-phenylalanine (CAS RN: 63-91-2), L-proline (CAS RN: 147-85-3), L-tryptophan (CAS RN: 73-22-3), and L-tyrosine (CAS RN: 60-18-4) were measured over a wide temperature range. Prior to heat capacity measurements, thermogravimetric analysis was performed to determine the decomposition temperatures while X-ray powder diffraction (XRPD) and heat-flux differential scanning calorimetry (DSC) were used to identify the initial crystal structures and their possible transformations. Crystal heat capacities of all five amino acids were measured by Tian–Calvet calorimetry in the temperature interval from 262 to 358 K and by power compensation DSC in the temperature interval from 307 to 437 K. Experimental values determined in this work were then combined with the literature data obtained by adiabatic calorimetry. Low temperature heat capacities of L-histidine, for which no literature data were available, were determined in this work using the relaxation (heat pulse) calorimetry from 2 K. As a result, isobaric crystal heat capacities and standard thermodynamic functions up to 430 K for all five crystalline amino acids were developed. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/GA19-02889S" target="_blank" >GA19-02889S: Stability of amorphous solid dispersions: Predictions by SAFT equations of state and their experimental verification</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Molecules

ISSN

1420-3049

e-ISSN

—

Volume of the periodical

26

Issue of the periodical within the volume

14

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

4298

UT code for WoS article

000676354700001

EID of the result in the Scopus database

2-s2.0-85111077064