Effect of drying methods (microwave vacuum, freeze, hot air and sun drying) on physical, chemical and nutritional attributes of five pepper (Capsicum annuum var. annuum) cultivars
2018/01/04 by Vaibhav Kumar Maurya, Kodiveri Muthukaliannan Gothandam, Vijay Ranjan +2 · 16 citations
Agricultural and Biological Sciences · Neuroscience · #Food Drying and Modeling #Microencapsulation and Drying Processes #Ion Channels and Receptors
paper · doi:10.1002/jsfa.8868
Abstract
Abstract BACKGROUND A randomized block design experiment was performed to investigate the influence of drying on the physical, chemical and nutritional quality attributes of five prominent cultivars of India under sun drying (SD) (mean temperature 35.5 °C, average daily radiation 5.26 kW h m −2 and mean relative humidity 73.66% RH), hot air drying (HD) at 65 °C, microwave vacuum drying (MVD) (800 W, 5 kPa) and freeze drying (FD) (−50 °C, 5 kPa). Water activity, pH, total phenolic content (TPC), ascorbic acid (AA), capsaicin, β‐carotene, color and Scoville heat unit were studied. RESULTS TPC, AA, capsaicin content, β‐carotene, color and water activity were significantly affected by the drying method. FD was observed to be most efficient in minimizing the loss of color, capsaicin and β‐carotene. The hotness of analyzed samples decreased in the order ‘Bird's Eye’ > ‘Sannam S4’ > ‘CO‐4’ > ‘PLR‐1’ > ‘PKM‐1’ among the studied cultivars, and FD > MVD > HD > SD among the drying methods. CONCLUSION The FD method was observed to be the most efficient drying method for retaining capsaicin content over other drying methods (SD, HD, MVD), whereas MVD was found to be most efficient in minimizing the loss to nutritional attributes for all five pepper cultivars. © 2018 Society of Chemical Industry
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