Thermal analysis of some α-amino acids with similar structures

Rodante, F.; Marrosu, Giancarlo; Catalani, G.

doi:10.1016/0040-6031(92)80018-r

Cited by 94 publications

(71 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Investigating the thermal stability of the individual amino-acids by thermogravimetry (TGA) with 10 K·min -1 we found, in line with results from the literature [13,14] that all of them decompose mainly within the range of 200-300 °C (see Table 3). Namely, Glutamic, or Aspartic acid as well as Leucine should be decomposed by at least 50% each at the temperature at which the micro-tubes were obtained.…”

Section: Resultssupporting

confidence: 65%

Keratin made micro-tubes: The paradoxical thermal behavior of cortex and cuticle

Istrate

Er-Rafik²,

Popescu

et al. 2016

International Journal of Biological Macromolecules

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 65%

Keratin made micro-tubes: The paradoxical thermal behavior of cortex and cuticle

Istrate

Er-Rafik²,

Popescu

et al. 2016

International Journal of Biological Macromolecules

View full text Add to dashboard Cite

“…In conclusion, the components of the two class of pesticides also in the cases of similar but not identical structures show different thermal behaviour ( with the exception of the compounds bearing S-CH3 and O-CH3 substituents) contrary to what occurs for some standard o~-amino acids [11]. Therefore, the TG-DSC curves represent a rapid tool enabling a first evidence for the presence of these compounds.…”

Section: Resultsmentioning

confidence: 96%

“…However, this technique can supply useful information on the characterization of some compounds with similar structures. In this manner, it was possible [11] to group some a-amino acids by the shape of their thermoanalytical curves and related thermodynamic quantities.…”

Section: CLmentioning

confidence: 99%

Thermal analysis and kinetic study of decomposition processes of some pesticides

Rodante¹,

Marrosu²,

Catalani

1992

Journal of Thermal Analysis

Self Cite

View full text Add to dashboard Cite

The thermal analysis of some pesticides using simultaneous TG-DSC measurements and kinetic calculations by the dynamic TG technique have been carded out.With this technique it was attempted to group compounds with similar structures according to the shape and number of peaks of their thermoanalytieal curves and to characterize their features by means of thermodynamic and kinetic quantities.Small variations in the structure of the components of a class make larger variations in the thermodynamic and kinetic values being in close agreement with the observed differences in their biological behaviour.

show abstract

“…The structure of glycine makes it more resilient to high temperatures when compared to other amino acids (Rodante et al 1992). We suspect that if glycine and alanine were produced on the parent body during the aqueous alteration regime, they should have survived the asteroidal heating by sublimation and dissipation through cracks or connected voids into zones where the temperature was more benign.…”

Section: Nitrogen Isotopic Compositionsmentioning

confidence: 99%

Amino acid compositions in heated carbonaceous chondrites and their compound-specific nitrogen isotopic ratios

et al. 2016

View full text Add to dashboard Cite

A novel method has been developed for compound-specific nitrogen isotope compositions with an achiral column which was previously shown to offer high precision for nitrogen isotopic analysis. We applied the method to determine the amino acid contents and stable nitrogen isotopic compositions of individual amino acids from the thermally metamorphosed (above 500°C) Antarctic carbonaceous chondrites Ivuna-like (CI)1 (or CI-like) Yamato (Y) 980115 and Ornans-like (CO)3.5 Allan Hills (ALH) A77003 with the use of gas chromatography/combustion/isotope ratio mass spectrometry. ALHA77003 was deprived of amino acids due to its extended thermal alteration history. Amino acids were unambiguously identified in Y-980115, and the δ 15 N values of selected amino acids (glycine +144.8 ‰; α-alanine +121.2 ‰) are clearly extraterrestrial. Y-980115 has experienced an extended period of aqueous alteration as indicated by the presence of hydrous mineral phases. It has also been exposed to at least one post-hydration short-lived thermal metamorphism. Glycine and alanine were possibly produced shortly after the accretion event of the asteroid parent body during the course of an extensive aqueous alteration event and have abstained from the short-term post-aqueous alteration heating due to the heterogeneity of the parent body composition and porosity. These carbonaceous chondrite samples are good analogs that offer important insights into the target asteroid Ryugu of the Hayabusa-2 mission, which is a C-type asteroid likely composed of heterogeneous materials including hydrated and dehydrated minerals.

show abstract

Thermal analysis of some α-amino acids with similar structures

Cited by 94 publications

References 29 publications

Keratin made micro-tubes: The paradoxical thermal behavior of cortex and cuticle

Keratin made micro-tubes: The paradoxical thermal behavior of cortex and cuticle

Thermal analysis and kinetic study of decomposition processes of some pesticides

Amino acid compositions in heated carbonaceous chondrites and their compound-specific nitrogen isotopic ratios

Contact Info

Product

Resources

About