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Aisyah Tri Septiana
Jurusan Teknologi Pertanian, Fakultas Pertanian, UNSOED, Purwokerto
Agriculture, Biological Sciences & Forestry

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Pengaruh Spesies Zingiberaceae (Jahe, Temulawak, Kunyit, dan Kunyit Putih) dan Keetbalan Isiran Sebelum Pengeringan terhadap Kadar dan Aktivitas Antioksidan Ekstrak Aseton yang Dihasilkan Aisyah Tri Septiana; Mustaufik Mustaufik; Hidayah Dwiyanti; Deddy Muchtadi; Fransiska Zakaria; Maria Menu Ola
agriTECH Vol 26, No 2 (2006)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1468.305 KB) | DOI: 10.22146/agritech.9473

Abstract

This research was aimed to determine the influence ofzingiberaceae species and the influence ofslice thickness before drying process by using cabinet dryer to the antioxidant content (total phenolics and curcumin) and antioxidant activity (absorbance of peroxide and malonaldehide ). The results of the research showed that total phenolics of turmeric extract (216.57 ppm) and temulawak (190.41 ppm) > ginger (127,97 ppm) > white turmeric extract (31,13 ppm), where as curcumin content of turmeric (55,93 ppm) and temulawak extract (48,95 ppm) > white turmeric (6,51 ppm) and ginger extract (4,67 ppm). The antioxidant activity that is indicated peroxide and malonaldehide forming from 1 inoleic acid which is supplemented to temulawak extract, turmeric, and ginger extract > white turmeric extract. Turmeric, temulawak, and ginger extract had the antioxidant activity higher than tocopherol, where as white turmeric had lower antioxidant activity than a tocopherol. The slicing sample with slice size of 4 mm before drying process with cabinet dryer had rate and antioxidant activity better than that of 2 mm. The total phenolics of zingiberaceae extract with slice size of 4 mm (161,86 ppm) > 2 mm (121,18 ppm), and the curcumin content of zingiberaceae extract with slice of 4 mm (34,58 ppm) > 2 mm (23,45 ppm). The slice of 4 mm had a relatff higher value than the slice of 2 mm to the antioxidant activity zingiberaceae extract that is indicated peroxide and malonaldehide formation.
Penghambatan Oksidasi LDL oleh Ekstrak Air Jahe (Zingiber officinale Roscoe) Secara In Vitro Aisyah Tri Septiana; Fransiska Rungkat Zakaria
agriTECH Vol 22, No 1 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1345.393 KB) | DOI: 10.22146/agritech.13575

Abstract

Oxidative modification of LDL is believed to play an important role in atherogenesis. Water extract of ginger rhizomes exhibited antioxidative activity is higher than α tocopherol using linoleic acid as substrate. In addition, these extract is kind of ginger extract that daily consumed so may be can be used as functional food. We investigated the effect of in vitro these extract enrichment of LDL on the prevention of oxidative LDL by CuSO4. Plasma was supplemented with 430 or 4300 µg/ml water extract in dimethylsulfoxide (DMSO) (10 µ DMSO per ml plasma), incubated, and the LDL was isolated. Ginger extract also was suplemented on LDL was isolate, and incubated. Lag phase and malonaldehide content was analized after the isolated LDL was oxidized using CuSO4. The result showed that water extract of ginger rhizomes suplementation reduced melonaldehide formation depended on its suplementation. Suplementation these extract on plasma (4300 µg/ml plasma) only reduced 19,04 % malonaldehide content, whereas α tocopherol suplemtation can reduced 26,29 % malonaldehide formation. These extract suplementation on LDL isolate can reduced 43,91 % malonaldehide formation. This research has shown that ginger extract is capable of protecting LDL from oxidation.
Co-Authors Deddy Muchtadi Fransiska Rungkat Zakaria Fransiska Zakaria Hidayah Dwiyanti Maria Menu Ola Mustaufik