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  • 1 UNESP Faculdade de Ciências Farmacêuticas Araraquara Brasil Araraquara Brasil
  • | 2 UNESP Instituto de Química Araraquara Brasil CP. 355 14801-970 SP Araraquara Brasil CP. 355 14801-970 SP
  • | 3 DQCA-IBILCE-UNESP S. J. Rio Preto Brasil S. J. Rio Preto Brasil
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Abstract  

The guava seed protein isolate (PI) was obtained from the protein precipitation belonging to the class of the gluteline (Ip 4.5). The conditions for the preparation of the PI were determined by both the solubility curve and simultaneous thermogravimetry-differential thermal analysis (TG-DTA): pH 11.5, absence of NaCl and whiteners and T=(253)C. Under these conditions a yield of 77.00.4%, protein content of 94.20.3, ashes 0.500.05% and thermal stability, T=200C, were obtained. The TG-DTA curves and the PI emulsification capacity study showed the presence of hydrophobic microdomains at pH 11.5 and 3.0 suggesting a random coil protein conformation and, to pH 10.0, an open protein conformation. The capacity of emulsification (CE), in the absence of NaCl, was verified for: 1 – pH 3.0 and 8.5, using the IP extracted at pH 10.0 and 11.5, CE≥3435 g of emulsified oil/g of protein; 2 – pH 6.60 just for the PI obtained at pH 11.5, CE≥1408 g of emulsified oil/g of protein.

Manuscript Submission: HERE

  • Impact Factor (2019): 2.731
  • Scimago Journal Rank (2019): 0.415
  • SJR Hirsch-Index (2019): 87
  • SJR Quartile Score (2019): Q3 Condensed Matter Physics
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • Impact Factor (2018): 2.471
  • Scimago Journal Rank (2018): 0.634
  • SJR Hirsch-Index (2018): 78
  • SJR Quartile Score (2018): Q2 Condensed Matter Physics
  • SJR Quartile Score (2018): Q2 Physical and Theoretical Chemistry

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
4
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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