Papers by hanif ardhiansyah
Jurnal Bahan Alam Terbarukan
Turmeric (Curcuma longa L) is one of the many spices that grow on the Asian continent, especially... more Turmeric (Curcuma longa L) is one of the many spices that grow on the Asian continent, especially Southeast and South Asia, which can be utilized to its full potential, especially the antioxidant compounds contained in curcuminoids. This study aims to determine the effect of different forms of turmeric, powder and fresh, on the extraction using the reflux extraction method and antioxidant activity using the DPPH method (2,2-Diphenyl-1-PicrylHydrazyl). The reflux extraction process was carried out using distilled water with three variations of sample forms, turmeric powder, fresh turmeric (grated turmeric and pieces of turmeric) with a solute/solvent ratio (w/v) (1:5). The viscous extract in the form of a paste was obtained after the distillation process and solvent evaporation. The best extracts and essential oils obtained were extracts from powdered turmeric samples with yields of 8.28 (% w/w) and essential oils of 0.44 g, which were clearer than the other two samples. The analysis...
Advanced Science Letters, 2018
Advanced Science Letters, 2018
Journal of Physics: Conference Series
The availability of fossil energy as the main energy source makes its availability running low. O... more The availability of fossil energy as the main energy source makes its availability running low. One alternative energy source is biomass and it can be converted into biogas through a solid-state anaerobic digestion process. One of the many biomass types found in Indonesia is the wood-dust mahogany. The content of lignin contained in wood-dust mahogany makes the process of hydrolysis runs slowly. This causes the biogas production rate to be slow. This study examined the effects of temperature and duration of ultrasonic pretreatment on the characteristics of wood-dust mahogany and the rate of biogas formation along with kinetic study. This research was conducted in three stages, beginning with characterization stage to know the character of wood-dust mahogany, followed by ultrasonic pretreatment stage with time variation (10,20,30) minutes without heating and with heating temperature 70°C. The last stage was fermentation by using bioreactor for 60 days. The biogas produced was measure...
1. Membuat asam asetat dengan fermentasi aerob dari alkohol.
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Papers by hanif ardhiansyah