Study On Processing Characteristics Of Different Antiseptic Technology Of Chapped Jujube

This thesis taked Taigu Huping jujube which was not moldy chapped jujube as test materials. It taked the microwave, hot-air, chlorine dioxide these antisepsis treatment for chapped jujube, compared with different jujube products required raw materials, analysed of the change of chapped jujube texture and nutrient of different maturation stages, different antisepsis ways to determine the type of processing product. The results are as follows:1.Used720w microwave of chapped jujube, kept working180s, jujube had the smell of cooking, accelerated the degradation of chlorophyll in the jujube peel, jujube peel faded green become yellow, inhibited jujube coloration area’s enlargement, and textures became soften. Used microwave of chapped jujube, hardness, chewiness, springiness, cohesiveness and Vc content decreased, adhesiveness, soluble solids content and titratable acid content increased. After processing, hardness was3.89～18.8N, the elasticity of2.54-3.54mm, adhesion was2.08-3.64N.mm, chewiness was9.70～24.86mJ, cohesiveness was0.18～0.27, soluble solids content of16.57～24.43%, titratable acid of0.37～0.59%, total sugar content of14.54～21.47%,Vc content of32.3-243.9mg/1OOg.2. Used70℃hot-air of chapped jujube, kept working2h, due to the maillard reaction, the color of jujube deepened. Hot-air treatment three maturity chapped, jujube hardness was3.89～37.37N, the elasticity of4.40～5.34mm, adhesive was1.42～2.92N.mm, chewiness was18.40～46.90mJ, cohesion is0.21～0.32, soluble solids content of20.43～27.02%, titratable acid of0.32～0.57%, total sugar content of14.84～23.22%,Vc content of11.2～135.8mg/100g. Vc content of jujube loss serious, other indicators change smaller.3. Used90mg/L chlorine dioxide concentration for20min, hardness was36.80～42.12N, the elasticity of4.36～5.82mm, adhesive was1.26～2.32N.mm, chewiness was39.30-56.90mJ, cohesion was0.21～0.34, soluble solids content of16.12～24.43%, titratable acid of0.37～0.54%, total sugar content of14.23～21.57%,Vc content of132.6～361.3mg/100g. The minimum of change on chapped jujube hardness, springiness, chewiness, cohesiveness and adhesiveness; due to breathing metabolic consumption, titratable acid content decreased obviously; soluble solids content·increased; Effectively keep Vc content of jujube.4. Used chlorine dioxide and hot-air of chapped jujube suitable for processing into dry products; chapped jujube treated by three kinds of anticorrosive processing, suitable for processing into jujube paste products, jujube powder, jujube juice and fermentation products,...