The Zingiberaceae Plant and its Properties

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Studies done by Sirirugsa (1999) detailed that Zingiberaceae consists of 1,500 species around the world. In Malaysia there are 650 species growing well involving 25 genera. Zingiber zerumbet (Z. zerumbet) is most popular among the species in this family. Malaysians are more familiar with this plant as 'lempoyang' by the Malays, 'Qiu Hong Jiang' by the Chinese and Indians as 'narkuchur'. Many researchers interested in reviewing this plant because its advantages. This plant is much use as a food, spices, dye, perfumes, toiletries, nutraceutical and cosmetics products. Moreover, it is also rich in phytochemical contents that can prevent and treat disease. This plant first attracted public attention in Malaysia when in 2011, a study conducted at University Putra Malaysia (UPM) for the prevention of cervical cancer without any side effects (Abdelwahab, 2011).

Many researchers have studied this from the standpoint of plant phytochemicals such as studies on the essential oil composition Z. zerumbet studied as early as 1943 by Varier. Followed by a very high content zerumbone (Hasnah, 1991), (Vahirua et al., 1993; Srivastava et al., 2000; Murakami et al., 2002; Yu et al., 2010) including humulene, Cambrian, camphene, borneol and camphor (Okamoto et al., 2011). Phytochemical content in Z.zerumbet a plant capable of making a high content of antioxidants and could be potentially induced nephrotoxicity; relieve some pain condition (Abdul Hamid et al., 2012).

This plant is beneficial to humans to improve the quality of health, but the quantity and quality of its influenced by various factors such as environmental factors. Right handling in postharvest is very important to maximize phytochemical composition. It is influenced by several facto...

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...were subject to two different drying methods: (1) oven-drying and (2) freeze-drying. Each drying method, 1kg of rhizomes was used. Rhizomes were oven dried using Memmert model 800 for 31 hours at temperature 50oC. In the freeze drying, the samples were lyophilized overnight in a vacuum flask at 0.125 bars and -50oC in freeze dryer (Labconco). The drying condition employed in each method after achieving a percentage moisture content <10%.

3.2.3 Essential oil extraction
Sample of 400g fresh rhizome using 2L of distilled water and 100g dried sample using 5L of distilled water was extracted using hydro-distillation with modified Clevenger type glass apparatus for 4 hours in isolation of oil separately. The oil samples were stored at room temperature (25±1oC) in airtight amber vials after drying them over anhydrous sodium sulfate before going into GC_MS analysis.

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