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Application of MAP & UHP in Storage of Bamboo Shoots

Author: ChenJinFeng
Tutor: MaoLinChun
School: Zhejiang University
Course: Of Food Science
Keywords: Bamboo shoots Modified atmosphere Extra high voltage Fresh Quality Enzyme
CLC: TS255.3
Type: Master's thesis
Year: 2011
Downloads: 118
Quote: 0
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Abstract


The trial to study the effect of low density polyethylene bags of fresh bamboo shoots and methods . Respectively 0.02,0.03 and 0.04 mm thickness of low-density polyethylene (LDPE) film bag bamboo shoots , each bagged amount were 0.25, 0.50 and 0.75kg storage at 2 ℃ . The results showed that the the the LDPE bags thickness of 0.04 mm , and put the amount of 0.75kg of fresh bamboo shoots the best . LDPE bag in to reduce bamboo shoots weightlessness and browning at the same time , you can significantly reduce crude fiber and lignin content , and effective inhibition of peroxidase and phenylalanine ammonia lyase activity significantly stimulate the activity of polyphenol oxidase . The results prove suitable LDPE bag bamboo shoots the lignification and aging far lower than packing bamboo shoots , The low temperature LDPE bag storage bamboo shoots good preservation . Provide a theoretical basis for the preservation and processing of ultra - high pressure technology for bamboo shoots to study ultra-high pressure processing of bamboo shoots sensory , nutrition, and activity . The test using 200 MPa to 400 MPa and 600 MPa three pressure , combined with a processing time of 10 min and 20 min , and ultra-high pressure processing of bamboo shoots . Found that high pressure treatment caused decreased bamboo shoots surface white , some loss of soluble protein ; peroxidase ultra-high pressure has a strong resistance , phenylalanine ammonia lyase and polyphenol oxidase with increasing pressure obviously show a downward trend , high pressure treatment has the effect of stimulus cellulase activity . 600 MPa-10 min high pressure treatment can help to inhibit the bamboo shoots lignin synthesis and enzymatic browning inhibition of cellulose to increase , it is the best combination of conditions in this experiment .

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CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > Fruits, vegetables,nuts processing industry > Fruit and vegetable processing and preservation
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