Drying characteristics, quality and safety aspects of bamboo shoots using difference drying methods

Physical and chemical properties of bamboo shoots revealed that the middle part of bamboo shoots was suitable for drying and consumption. The optimum conditions for cyanide reduction were boiling at 100°C for 30 min. Modified Halsey and Modified Oswin models were the best fit for fresh and boiled bamboo shoots, respectively. Drying constant was increased with high drying temperature or microwave power as well as boiling treatment. The three parameter model was the most effective model to describe the drying behaviors of bamboo shoots. Boiled bamboo shoots and dried using microwave power at 720 W could decrease drying time up to 20 fold and increase the retention of total phenolics (11.08%), 2, 2-diphenyl-1-picrylhydrazyl (DPPH) (20.75%) and 2, 2'-azino-bis (3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) (2.13%) compared to conventional tray drying at high temperature of 60°C and provide the lowest cyanide residue and shortest drying time

The solar drying of bananas

In 2 volsSIGLEAvailable from British Library Document Supply Centre-DSC:DXN027310 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Changes and degradation kinetics of some bioactive compounds in dried Orthosiphon aristatus (Java tea) leaves during elevated temperature storage

BACKGROUND Orthosiphon aristatus is a traditional medicinal herb mostly used in South East Asia, and has many health benefits. The packaging types and storage temperatures were investigated in order to select the best condition to produce high bioactive compounds (BC) of two kinds of dried Orthosiphon aristatus leaves. RESULTS Blanched leaves were vacuum packed in polypropylene (PP) and aluminum foil laminated with polyethylene terephthalate and polyethylene (PET/Al/PE) and dried in a freeze dryer (B_FD) or heat pump‐assisted dehumidified dryer (B_HPD60) at 60°C prior to storage at 15°, 25° and 35°C for 6 months. Leaves in PET/Al/PE bags had higher total phenolic content (TPC), antioxidant activity (AOA) and BC than in PP bags (p≤0.05). Storage at 15 °C retained the highest TPC and AOA in PET/Al/PE bags (p≤0.05). The degradation kinetics for BC, sinensetin and eupatorin, followed first‐order kinetics. Half‐lives (t1/2) for BC in PET/Al/PE were higher than in PP and were the highest at 15°C for both packaging types. CONCLUSIONS Low temperature and PET/Al/PE bags provided the highest bioactive compound retention. The dried leaves from B_HPD60 and packed in PET/Al/PE bags had higher resistant to degradation of sinensetin than B_FD in PP bags.This accepted article is published as Klungboonkrong, V., Lamsal, B.P., Phoungchandang, S., Changes and Degradation Kinetics of some Bioactive Compounds in dried Orthosiphon Aristatus (Java Tea) Leaves during Elevated Temperature Storage. Journal of the Science of Food and Agricuture, 2018; Doi: 10.1002/jsfa.9268. Posted with permission. </p