NDLI: Changes in physical properties and relations with allicin degradation during convective drying of garlic

Content Provider	Springer Nature Link
Author	Lilia, Méndez Lagunas Juan, Rodríguez Ramírez David, Reyes Vásquez Anabel, López Ortiz
Copyright Year	2017
Abstract	The objective of this work was to establish the relationship between the physical properties and the ability to retain precursors of allicin into the structural matrix of garlic during convective drying. The study evaluated the retention of allicin and its relation to changes in the structural properties: apparent density (ρ$_{b}$), true density (ρ$_{p}$), porosity (ε) and shrinkage (S$_{b}$) during the garlic drying process. Drying kinetics, structural properties (SP) and allicin content (AC) were determined in garlic slices subjected to drying temperatures of 50 and 60 °C with airflow of 1.5 m/s. To calculate structural properties, the experimental data volume of the solid was determined using volumetric displacement and gas stereopycnometer methods. The AC was determined by the HPLC method. Data were correlated using Pearson’s equation. The results showed a strong relationship between AC and S$_{b}$, ρ$_{p}$ and ρ$_{b}$, while a weak relation to the Ɛ was found for both temperatures. The kinetics showed two stages, the first showed a rapid increase in the ρ$_{p}$, ρ$_{b}$ and S$_{b}$, according to the loss of allicin. In the second, the increase of ρ$_{p}$, ρ$_{b}$ and S$_{b}$ remained without significant losses of allicin. The results suggest that a denser structure prevents the penetration of oxygen through the solid reducing the degradation of bioactive compounds during the first stage. Both, the temperature and changes in the SP affect the retention of allicin. The drying temperature of 60 °C can induce more rapid shrinkage and dense structures and partially inactivate the enzyme alliinase.
Starting Page	1227
Ending Page	1232
Page Count	6
File Format	PDF
ISSN	21934126
Journal	Sensing and Instrumentation for Food Quality and Safety
Volume Number	11
Issue Number	3
e-ISSN	21934134
Language	English
Publisher	Springer US
Publisher Date	2017-03-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Garlic Allicin Allium sativum L. Convective drying Physical properties Food Science Chemistry/Food Science Engineering
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Chemical Engineering Safety, Risk, Reliability and Quality Food Science

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