Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong

Ginger (Zingiber officinale Roscoe) is a popular culinary herb used in the Eastern culture. The essential cultivar of the Zingiber genus is rich in antioxidants and is crucial in the fight against oxidative stress-related diseases. The antioxidant properties of dried ginger were evaluated and compar...

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Main Authors: Mustafa, Iswaibah, Chin, Nyuk Ling
Format: Article
Published: Multidisciplinary Digital Publishing Institute 2022
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author Mustafa, Iswaibah
Chin, Nyuk Ling
author_facet Mustafa, Iswaibah
Chin, Nyuk Ling
author_sort Mustafa, Iswaibah
collection UPM
description Ginger (Zingiber officinale Roscoe) is a popular culinary herb used in the Eastern culture. The essential cultivar of the Zingiber genus is rich in antioxidants and is crucial in the fight against oxidative stress-related diseases. The antioxidant properties of dried ginger were evaluated and compared for their efficacy from different drying processes (sun-, oven-, vacuum- and freeze-drying) and using three extraction solvents: hot water, aqueous ethanol (80%, v/v) and ethanol. The drying process demonstrated a positive effect on the antioxidant activities of ginger. A significant difference (p < 0.05) was observed in the extracting ability of each solvent. Sun-dried ginger extracted with ethanol performed better than the fresh ginger extract in the form of increased yield (3.04-fold), TFC values (12.25-fold), reducing power (FRAP) (15.35-fold), total antioxidant activity (TAA) (6.82-fold) and inhibition of ABTS•+ radical cation (3.51-fold) and DPPH• radical (95%). Meanwhile, freeze-dried aqueous ginger extracts demonstrated significantly higher TPC (1.66-fold), TFC (3.71-fold), FRAP (3.26-fold), TAA (2.97-fold), ABTS•+ scavenging activity (1.48-fold) and DPPH• radical inhibition (77%), compared to fresh ginger extracts. In addition, it was found that ethanol was significantly superior to aqueous ethanol in phenolic content recovery, despite the lower yield. Furthermore, ethanol ginger extracts exhibited higher antioxidant activity than aqueous ethanol extracts. On the other hand, hot water was the least potent solvent for extraction. In summary, there was an excellent correlation between TPC, TFC and antioxidant activity. Sun-drying is the most desirable method for preserving and enhancing ginger quality due to its cost effectiveness and bioactive compound efficacy.
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spelling upm.eprints-1002982024-03-18T04:05:56Z http://psasir.upm.edu.my/id/eprint/100298/ Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong Mustafa, Iswaibah Chin, Nyuk Ling Ginger (Zingiber officinale Roscoe) is a popular culinary herb used in the Eastern culture. The essential cultivar of the Zingiber genus is rich in antioxidants and is crucial in the fight against oxidative stress-related diseases. The antioxidant properties of dried ginger were evaluated and compared for their efficacy from different drying processes (sun-, oven-, vacuum- and freeze-drying) and using three extraction solvents: hot water, aqueous ethanol (80%, v/v) and ethanol. The drying process demonstrated a positive effect on the antioxidant activities of ginger. A significant difference (p < 0.05) was observed in the extracting ability of each solvent. Sun-dried ginger extracted with ethanol performed better than the fresh ginger extract in the form of increased yield (3.04-fold), TFC values (12.25-fold), reducing power (FRAP) (15.35-fold), total antioxidant activity (TAA) (6.82-fold) and inhibition of ABTS•+ radical cation (3.51-fold) and DPPH• radical (95%). Meanwhile, freeze-dried aqueous ginger extracts demonstrated significantly higher TPC (1.66-fold), TFC (3.71-fold), FRAP (3.26-fold), TAA (2.97-fold), ABTS•+ scavenging activity (1.48-fold) and DPPH• radical inhibition (77%), compared to fresh ginger extracts. In addition, it was found that ethanol was significantly superior to aqueous ethanol in phenolic content recovery, despite the lower yield. Furthermore, ethanol ginger extracts exhibited higher antioxidant activity than aqueous ethanol extracts. On the other hand, hot water was the least potent solvent for extraction. In summary, there was an excellent correlation between TPC, TFC and antioxidant activity. Sun-drying is the most desirable method for preserving and enhancing ginger quality due to its cost effectiveness and bioactive compound efficacy. Multidisciplinary Digital Publishing Institute 2022-01-01 Article PeerReviewed Mustafa, Iswaibah and Chin, Nyuk Ling (2022) Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong. Foods, 12 (1). art. no. 178. pp. 1-18. ISSN 2304-8158 https://www.mdpi.com/2304-8158/12/1/178 10.3390/foods12010178
spellingShingle Mustafa, Iswaibah
Chin, Nyuk Ling
Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong
title Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong
title_full Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong
title_fullStr Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong
title_full_unstemmed Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong
title_short Antioxidant properties of dried ginger (Zingiber officinale Roscoe) var. Bentong
title_sort antioxidant properties of dried ginger zingiber officinale roscoe var bentong
work_keys_str_mv AT mustafaiswaibah antioxidantpropertiesofdriedgingerzingiberofficinaleroscoevarbentong
AT chinnyukling antioxidantpropertiesofdriedgingerzingiberofficinaleroscoevarbentong