Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods
Gingerols and shogaols are compounds found in ginger (Zingiber officinale Roscoe); shogaols are found in lower concentration than gingerols but exhibit higher biological activities. This work studied the effects of different drying methods including open sun drying (OSD) solar tunnel drying (STD) an...
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| Format: | Conference or Workshop Item |
| Language: | English |
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Faculty of Agriculture, Universiti Putra Malaysia
2018
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| Online Access: | http://psasir.upm.edu.my/id/eprint/77283/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-2.pdf |
| _version_ | 1825950823385923584 |
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| author | Jaafar, Hawa Z. E. Ghasemzadeh, Ali |
| author_facet | Jaafar, Hawa Z. E. Ghasemzadeh, Ali |
| author_sort | Jaafar, Hawa Z. E. |
| collection | UPM |
| description | Gingerols and shogaols are compounds found in ginger (Zingiber officinale Roscoe); shogaols are found in lower concentration than gingerols but exhibit higher biological activities. This work studied the effects of different drying methods including open sun drying (OSD) solar tunnel drying (STD) and hot air drying (HAD) with various temperature on the formation of six main active compounds in ginger rhizomes, namely 6-, 8-, and 10-gingerols and 6-, 8-, and 10-shogaols, as well as essential oil content. High performance liquid chromatography (HPLC) analysis showed that after HAD with variable temperature (120, 150 and 180 °C), contents of 6-, 8-, and 10-gingerols decreased, while contents of 6-, 8-, and 10-shogaol increased. High formation of 6-, 8-, and 10-shogaol contents were observed in HAD (at 150 °C for 6 h) followed by STD and OSD, respectively. Ginger-treated with HAD exhibited the highest DPPH (IC50 of 57.8 mg/g DW) activity, compared to STD and OSD method. Result of this study confirmed that conversion of gingerols to shogaols was significantly affected by different drying temperature and time. HAD at 150 °C for 6 h, provides a method for enhancing shogaols content in ginger rhizomes with improving antioxidant activities. |
| first_indexed | 2024-03-06T10:20:31Z |
| format | Conference or Workshop Item |
| id | upm.eprints-77283 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T10:20:31Z |
| publishDate | 2018 |
| publisher | Faculty of Agriculture, Universiti Putra Malaysia |
| record_format | dspace |
| spelling | upm.eprints-772832020-03-04T07:28:47Z http://psasir.upm.edu.my/id/eprint/77283/ Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods Jaafar, Hawa Z. E. Ghasemzadeh, Ali Gingerols and shogaols are compounds found in ginger (Zingiber officinale Roscoe); shogaols are found in lower concentration than gingerols but exhibit higher biological activities. This work studied the effects of different drying methods including open sun drying (OSD) solar tunnel drying (STD) and hot air drying (HAD) with various temperature on the formation of six main active compounds in ginger rhizomes, namely 6-, 8-, and 10-gingerols and 6-, 8-, and 10-shogaols, as well as essential oil content. High performance liquid chromatography (HPLC) analysis showed that after HAD with variable temperature (120, 150 and 180 °C), contents of 6-, 8-, and 10-gingerols decreased, while contents of 6-, 8-, and 10-shogaol increased. High formation of 6-, 8-, and 10-shogaol contents were observed in HAD (at 150 °C for 6 h) followed by STD and OSD, respectively. Ginger-treated with HAD exhibited the highest DPPH (IC50 of 57.8 mg/g DW) activity, compared to STD and OSD method. Result of this study confirmed that conversion of gingerols to shogaols was significantly affected by different drying temperature and time. HAD at 150 °C for 6 h, provides a method for enhancing shogaols content in ginger rhizomes with improving antioxidant activities. Faculty of Agriculture, Universiti Putra Malaysia 2018 Conference or Workshop Item PeerReviewed text en http://psasir.upm.edu.my/id/eprint/77283/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-2.pdf Jaafar, Hawa Z. E. and Ghasemzadeh, Ali (2018) Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods. In: Joint Symposium of the 8th International Agriculture Congress 2018 and 6th International Symposium for Food & Agriculture 2018 (8th IAC – 6th ISFA 2018), 13-15 Nov. 2018, Auditorium Rashdan Baba, TNCPI Building, Universiti Putra Malaysia. (pp. 17-20). |
| spellingShingle | Jaafar, Hawa Z. E. Ghasemzadeh, Ali Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods |
| title | Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods |
| title_full | Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods |
| title_fullStr | Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods |
| title_full_unstemmed | Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods |
| title_short | Alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods |
| title_sort | alteration in phytochemical constituents and antioxidant activity in ginger through application of different drying methods |
| url | http://psasir.upm.edu.my/id/eprint/77283/1/8TH%20IAC%20%E2%80%93%206TH%20ISFA%202018-2.pdf |
| work_keys_str_mv | AT jaafarhawaze alterationinphytochemicalconstituentsandantioxidantactivityingingerthroughapplicationofdifferentdryingmethods AT ghasemzadehali alterationinphytochemicalconstituentsandantioxidantactivityingingerthroughapplicationofdifferentdryingmethods |