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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Water sorption properties of papaya seeds (Carica papaya L.) formosa variety: An assessment under storage and drying conditions

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Author(s):
Rosa, Daniele Penteado [1] ; Evangelista, Rodrigo Rodrigues [1] ; Borges Machado, Andre Luiz [1] ; Ribeiro Sanches, Marcio Augusto [1] ; Telis-Romero, Javier [1]
Total Authors: 5
Affiliation:
[1] State Univ Sao Paulo, Food Engn & Technol Dept, Campus Sao Jose do Rio Preto, BR-15054000 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: LWT-FOOD SCIENCE AND TECHNOLOGY; v. 138, MAR 2021.
Web of Science Citations: 1
Abstract

In this research, sorption isotherms and thermodynamic properties of papaya seeds were evaluated by simulating storage and drying temperatures. Papaya seeds and its oil were evaluated for their proximate composition and physicochemical parameters, respectively. Water adsorption isotherms of papaya seeds were determined at seven temperatures (20-80 degrees C) by the gravimetric-static method. The net isosteric heat of sorption was determined by using Clausius-Clapeyron Equation. The differential enthalpy and entropy and the free Gibbs energy were calculated using the sorption data. The adsorption surface area was determined using the monolayer moisture content obtained from GAB model fitting. Peleg model was selected to describe the sorption isotherms of papaya seeds because it presented great precision (R-Adj(2) > 0.993 and chi(2) <= 0.00031). The equilibrium moisture content of the papaya seeds decreased with increasing temperature. At all temperatures, sorption isotherms exhibited type II sigmoid shape. The net isosteric heat of sorption (0.56-8.71 kJ/mol), differential enthalpy (-8.71 to -0.56 kJ/mol), and entropy (0.08-20.13 J/molK) decreased with the increasing of equilibrium moisture content. The enthalpy-entropy compensation theory was validated. The increase in temperature decreased the value of the surface area of sorption. The process was enthalpy-driven and nonspontaneous (+Delta G(B)). (AU)

FAPESP's process: 13/18947-4 - Extraction of oil from orange seeds by unconventional methods - Comparative study of Ultrasonic Extraction and Supercritical Fluid
Grantee:Daniele Penteado Rosa
Support Opportunities: Scholarships in Brazil - Doctorate