Porang (Amorphophallus muelleri Blume) as a non-timber forest product (NTFP) has many advantages compared to other food crops. In order to the cultivation aspect and excellence of the flour, it made this commodity a food sources in the future. Today, technical post-harvest processing become the current problems especially in getting optimum glucomannan. With increasing levels of glucomannan, it made the utilization and marketing of flour will be wider. This study aims to optimize of purification techniques of glucomannan. The research method is through soaking techniques with ethanol (30%, 40% and 50%) and sodium bisulfite (2%, 3% and 4%). The results showed that the leaching technique ethanol made a significant effect on the increase in glucomannan levels. The immersion technique with 50% ethanol and 2% sodium bisulfite can increase glucomannan from 32.65% to 83.96%. The process of soaking with ethanol not affects the content of ferrum (Fe) and calcium (Ca) in porang flour. ABSTRAK Porang (Amorphophallus muelleri Blume) sebagai salah satu jenis hasil hutan bukan kayu (HHBK) memiliki berbagai keunggulan dibandingkan dengan tanaman pangan lainnya. Berdasarkan aspek budidaya dan kandungan tepungnya, jenis komoditi ini bisa dimanfaatkan sebagai sumber pangan masa depan. Teknik pengolahan pasca panen menjadi permasalahan saat ini terutama dalam mendapatkan kadar glukomanan optimal. Ragam pemanfaatan dan pemasaran tepung porang akan semakin terbuka lebar dengan meningkatnya kadar glukomanan. Penelitian ini bertujuan untuk mendapatkan teknik pemurnian glukomanan yang optimal. Metode penelitian adalah melalui teknik perendaman dengan etanol (30%, 40%, dan 50%) dan natrium bisulfit (2%, 3%, dan 4%). Hasil penelitian menunjukkan bahwa teknik perendaman dengan etanol yang dilakukan berpengaruh nyata terhadap peningkatan kadar glukomanan. Pencucian dengan etanol 50% dan NaHSO 3 2% dapat meningkatkan glukomanan dari 32,65% menjadi 83,96%. Proses perendaman dengan etanol tidak mempengaruhi kandungan zat besi (Fe) dan kalsium (Ca) tepung porang.
Waluyo TK, Wibowo S. 2018. Dracorhodin: A potential marker compound for detecting the presence of dragon’s blood resin from Daemonorops originated from Indonesia. Biodiversitas 19: 1665-1671. Dragon's blood typifies as red-colored resin, which is presented by several plant genus, i.e., Dracaena, Daemonorops, Croton, and Pterocarpus. In Indonesia, dragon's blood is originated from Daemonorops which grows scattered in Sumatera and Kalimantan islands. Relevantly, this study was conducted to identify the specific compounds of dragon's blood originated from Indonesia's Daemonorops. Dragon's blood test samples were originated from 16 different towns in Indonesia, which are known as the center of dragon's blood-production. The samples were in powder and solid formation. The compounds of samples were analyzed using GC-MS instrument. Results revealed that dragon's blood in powder and solid formation were inherently similar. Dragon's blood powder was obtained from wet extraction, while dragon's blood solid from dry extraction. Results of chemical analysis on 16 dragon's blood samples disclosed that three compounds were frequently detected associated with dragon's blood presence. Dracorhodin compound was detected in 16 dragon's blood samples i.e 3,4-dihydro-5-methoxy-6-methyl-2-phenyl-2H-1-benzopyran-7-ol in 13 samples; and trendione in 9 samples. Accordingly, dracorhodin could serve as the most compound containing in dragon's blood originated from Indonesia's Daemonorops, which could be observed from 16 tested Daemonorops dragon's blood samples from several regions (towns) in Indonesia.
Dragon's blood is essentially a red-colored resin secreted by the fruits of rattan species. The dragon's blood originated from Indonesia which becomes widespread in international market is indigenous from The dragon's blood has been popularly used as traditional medicines. To confirm such dragon's blood efficacy, an assesment was already conducted regarding the phytochemical screening, antioxidant activity, and anticoagulant activity indicatively afforded by the dragon's blood resin produced by three rattan species, i.e. Mart, BL, and BL. Phytochemical screening aimed to identify the kinds of chemical compounds inside the dragon's blood resin; antioxidant tests used DPPH (2,2-diphenyl-1-picrylhydrazyl); and anticoagulation tests proceed in-vitro using rabbit blood. Results revealed that the dragon's blood from those three species, extracted using polar (methanol) and semi-polar (ethyl acetate) solvents, contained chemical compounds which are already renowed for medicinal efficacy and potent antioxidant, e.g. flavonoids, triterpenoids, and tannin. The greatest antioxidant potency was imparted by dragon's blood from Mart, as indicated by its lowest IC value (71.89U 3,89 mgL). The ethyl acetate dragon's blood extract, rather than promoting anticoagulat action on the rabbit-blood, in fact induced the blood coagulation, whereby the extract from Mart performed the most effectively (shortest in coagulation time).
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