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The present investigation on Optimization of yeast level and duration for aerobic and anaerobic fermentationfor production of jack fruit (Artocarpus heterophllyus L.) wine was carried out in the department of Post Harvest Technology, Kittur Rani Channamma College of Horticulture (University of Horticultural Sciences, Bagalkot), Arabhavi, during the year 2010-2011. It consisting of different treatments viz T1 –20 g of yeast for 100 Kg of must+24 hrs aerobic and 7 days anaerobic fermentation, T2-30 g of yeast for 100 Kg of must+24 hrs aerobic and 7 days anaerobic fermentation, T3–20 g of yeast for 100 Kg of must+24 hrs aerobic and 14 days anaerobic fermentation, T4 –30 g of yeast for 100 Kg of must+24 hrs aerobic and 14 days anaerobic fermentation, T5 –20 g of yeast for 100 Kg of must+48 hrs aerobic and 7 days anaerobic fermentation, T6 –30 g of yeast for 100 Kg of must+48 hrs aerobic and 7 days anaerobic fermentation, T7 –20 g of yeast for 100 Kg of must+48 hrs aerobic and 14 days anaerobic fermentation and T8 –30 g of yeast for 100 Kg of must+48 hrs aerobic and 14 days anaerobic fermentation. The experiment was laid out in a completely randomized design with three replications. The main objective was to standardize the optimum yeast level and duration required for aerobic and anaerobic fermentation and also to study various biochemical and organoleptic quality of wine recorded at regular interval during the storage of wine. The highest TSS was maintained in treatment T1 (10.47) and T4 (10.47) in cold condition and in ambient condition T1 (10.43) followed by T2 (10.35) shows highest TSS. The pH value increases from 3.36 (fresh wine) to 3.89 (6 MAS in cold) and 3.84 (6 MAS in ambient) and acidity will decrease from 0.59 to 0.49 (Cold) and 0.52 (ambient). Alcohol content increase from 7.46 to 8.12 percent (Cold) and 8.04 (Ambient). Tannin per cent were showed non significant difference and decreasing trend can be seemed over period of aging, T8 (30 g of yeast + 48 hrs aerobic and 14 days of anaerobic fermentation) observe the highest per cent of tannins throughout the investigation.
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