Author(s):

Syed Zubair, AR Sawate, RB Kshirsagar, BS Agarkar and BM Patil

Abstract: Present work have been undertaken to study the effects of different processing methods on essential oil and oleoresin contents, phyto-chemical constituents and antioxidant activity of dried ginger rhizome. Ginger (Zingiber officinale roscoe) is branched and horizontal rhizome and its size is near about 5 to 15 cm in length, 3 to 6 cm width and 0.5 to 1.5 cm thickness. Ginger is grown in most Indian states namely Meghalaya, Kerala, Arunachal Pradesh, Sikkim, Nagaland Mizoram, and Orissa. Ginger is known for its analgesic, antimicrobial, antibacterial, antidiabetic, antiemetic, antifungal, anthelmintic, anti-inflammatory, antithrombic, antitumor, antitussive, antiulcer, antiviral properties. The medicinal properties of ginger are contributed by presence of bioactive components, polyphenolic compound, flavonoids etc. The dried ginger rhizome (Sunth) can be prepared by using commercially adopted technologies like Surat method, Malabar method and MPKV method. From the investigation it was observed that ginger processed by MPKV method got superior result over Surat and Malabar method with respect to essential oil, oleoresin and gingerol contents i.e. 1.61 percent, 4.28 percent and 79.04 µg/ml respectively. The dried ginger (MPKV method) possess highest content of poly phenolic compounds, total flavonoids and total alkaloids i.e. 80.43 µg/ml, 426.40 µg/ml and 2.52 percent respectively. It was observed that highest antioxidant activity was found in dried ginger processed by MPKV method i.e. 5.31 mg/ml. From the present investigation it was concluded that the ginger sample processed by MPKV, rahuri method found significantly superior over other processing method with respect to phyto-chemical constituents and antioxidant activity.

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