The Dates Candied Fruit Antioxidant Activity of Different Storage Time

• Main Authors: HUANG,PO-MIN, 黃柏閔
• Other Authors: Yen,Ming-Tsung
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/47836390624454576426

碩士 === 嘉南藥理大學 === 保健營養系 === 104 === Taiwan jujube also known as "Taiwanqingzao" or "Taiwan candied" origin in India Ceylon, as buckthorn (Rhamnaceae) semi-deciduous small tree. Department of Taiwan's agricultural sector through the continuous improvement of the experiment successfully developed a new fruit. Taiwan jujube fruit Roucui thin, fragrant and juicy. Dates (Jujube) tropical plants, likes the high temperature, after the introduction of the Taiwan region, mainly in the south cultivation, small and sour fruit early, neglected, and later through continuous improvement of varieties and varieties selection, crisp sweet and juicy, most consumers, along with the rapid increase in market demand, has now become one of the major agricultural products of the region. Fresh candied after harvest because of the impact on the environment and the rapid ripening that dates can not be saved at room temperature for too long, due to the concentration on 11 dates through March each year of the production season, it is easy to yield too many problems occurred in the production season in order to maintain its economic value it will candied dates (candied fruit) processed to extend shelf life and its economic value. Due dates in antioxidants and storage of environmental factors has considerable relevance, so the study will examine the dates candied fruit in 0 , 180 and 365 days storage at different times, the dates candied fruit for antioxidant capacity of influence. According to the experimental results show that the first 0,180,365 stored at room temperature Day, the first refrigerated storage days 0,180,365, 0,180,365 stored frozen first day dates preserves the moisture content was 32%, 26%, 30% 35%, 25%, 31%, 32%, 24%, 29%; 0,180,365 first day storage at room temperature, refrigerated storage first day 0,180,365, 0,180,365 stored frozen first day candied dates crude ash contents were 0.12%, 0.13%, 0.12%, 0.12%, 0.14%, 0.15%, 0.14%, 0.14%, 0.13%; 0,180,365 first day storage at room temperature, refrigerated storage 0, 180,365 days, and stored frozen 0,180,365 first day candied dates crude protein contents were 0.15%, 0.16%, 0.35%, 0.54%, 0.43%, 0.37%, 0.68%, 0.65%, 0.66%; chamber the first day of the storage temperature 0,180,365, 0,180,365 the first day of refrigerated storage, cryopreservation 0,180,365 first day candied dates crude fat contents were 1.46%, 1.32%, 1.47%, 1.36%, 1.47 %, 1.35%, 1.46%, 1.44%, 1.49%; 0,180,365 first day storage at room temperature, refrigerated storage first day 0,180,365, 0,180,365 stored frozen first day of the dates candied crude fiber content respectively, 1.44%, 1.30%, 1.44%, 1.46%, 1.42%, 1.41%, 1.45%, 1.46%, 1.42%; 0,180,365 first day storage at room temperature, refrigerated storage 0,180,365 first day, the first day of the 0,180,365 stored frozen candied dates carbohydrate content were 63.91%, 71.06%, 66.37%, 61.4%, 71.19%, 65.47%, 64.22%, 71.45%, 66.4%, the content of the measurement result in the total score display 0 days at room temperature, chilled, frozen dates preserves its phenolic contents were 18.25,16.39,14.09 (mg gallic acid / g), 180 days at room temperature, chilled, frozen dates preserves its phenolic content respectively 8.28,7.63,8.04 (mg gallic acid / g), place the first 365 days of room temperature, chilled, frozen dates preserves its phenolic contents were 20.36,18.90,18.80 (mg gallic acid / g); total flavonoids the measurement results show whether in any storage conditions, because prolonged heating, making preserves flavonoids are not be measured; measured in the number of microorganisms, placed at room temperature, chilled, frozen one day the dates candied fruit and refrigerated, frozen place candied dates and number of microorganisms content 180 365 days are in compliance with health standards Hattori number of microorganisms, but stored at room temperature 180 and 365 days of the dates candied their bacteria content was significantly higher; the dates candied fruit extracts reducing power measurement results show whether place room temperature (0,180,365 days), refrigerated (0,180,365 days), all without refrigeration (0,180,365 days) the dates candied reducing power of significant differences; 1,1-diphenyl Clear the measurement results bitterness-2 group with the ability to display the rising concentration clears, candied dates have the ability to extract the bitterness of 1,1-diphenyl-2-yl group good results, at a concentration of 20mg / ml at clearance rate can reach 80% -90%; ferrous ion chelating ability assay showed the dates candied fruit extract at a concentration of about 5mg / ml had a good chelating effect, regardless of the dates candied fruit extract any storage conditions which are chelating force more than 90%; the measurement results show clear ABTS radical, no matter what the dates candied fruit extract concentration of storage conditions at 5mg / ml are good ABTS radical scavenging ability.