Dissertation > Excellent graduate degree dissertation topics show

Studies on the Quality of Phisio-Chemical and Fresh Keeping Technologies of Post-Harvest in Volvariella Volvacea

Author: ZuoLianJing
Tutor: ChenMingJie;XingZengTao
School: Nanjing Agricultural College
Course: Microbiology
Keywords: Volvariella volvacea fresh keeping irradiation MAP perforate phisio-chemical real-time quantitative PCR
CLC: S646.13
Type: Master's thesis
Year: 2011
Downloads: 31
Quote: 0
Read: Download Dissertation

Abstract


Volvariella volvacea is perishable and has a limited shelf-life, usually only 2 to 3 d at 15℃,so it is one of the most difficult storage in edible mushroom. This article used electron-beam irradiation MAP(modified atmosphere package) and modified atmosphere package films with perforated packaging method treatment with molecule level, research the phisio-chemical quality of Volvariella volvacea and found the apposite fresh keeping method in the post-harvest storage. The results of the experiments are followed:1. The fruiting bodies of Volvariella volvacea were irradiated by different dose levels of 1.0 kGy,1.5 kGy,2.0 kGy and 2.5 kGy electron-beam irradiation. They were storaged at 15℃and evaluated by sensory assessment weightlessness and hardness at different storage times. The results showed that the fruiting bodies of control which were not irradiated had higher sensory assessment which were 6 at the 4 d, but the fruiting bodies treated with different doses had lower sensory assessment which were out of edible; Hardness of all samples was falling during storage, but the samples of control had higher hardness; The fruiting bodies of control had lower weightlessness than other samples. Electron-beam irradiation at these levels did not affect in fresh keeping of Volvariella volvacea.2. Using different modified atmosphere package(MAP)films packaged the fruiting bodies of Volvariella volvacea. The results suggested that the quality of all samples were falling during storage. The fruiting bodies of control had higher sensory assessment; The weightlessness of control samples were significantly different with others which were lower; The hardness of all samples were falling during storage and the samples of control were 2-3 times higher than others; The soluble protein content were rapid descent in all samples at 24 h, but the rate of falling in samples of control was lower; The content of MDA was similar in all samples during storage and the activity of SOD、CAT had late peak value in samples of control. The results showed that MAP films package did not affect.3. The effect of modified atmosphere package films with perforated packaging method on the quality and shelf life of Volvariella volvacea during storage were investigated, compared with non-packaging. The results showed that the storage quality of non-packaging were bad than films with perforated packaging and the PVC12-6 was the best packaging method. The fruiting bodies packaged by PVC12-6 retained higher soluble protein content、activity of SOD、CAT、hardness、sensory assessment, exhibited lower MDA content、weightlessness and activity of protease. The same time the quality during storage were best and the storage time were 2-3 d longer than samples of control which storage time were only3-4 d.4. Based on the result of the third experiment, we studied the nitrogen metabolism of Volvariella volvacea in different storage time to find the best fresh keeping method. The fruiting bodies of control、PE11-6、PVC12-6 were tested in this experiment. The expression of the serine protease gene of the samples in different storage time were investigated by real-time quantitative PCR. The results showed that the relative expression of Ser gene of all samples exhibited a rapid increase at 48h, then they were continuous decrease. But the rate of decreased expression in control was lower than other samples. This result was coincidence relation with the third experiment.

Related Dissertations

  1. The City Image Analysis and Research of the Jilin City,TU984
  2. Study on Channel Coding Algorithm in IEEE802.16e,TN911.22
  3. Research on Multi-Robot Cooperative Pursuit Problem,TP242
  4. The Application of Mind Map in Science Teaching,G633.98
  5. The Application and Research of Concept Maps in Senior Middle School Biological Teaching,G633.91
  6. The Design and Research of Health Management Based on Smartphone Environment,TN929.53
  7. The Study on the Creep Resistance Property of Ultra-High Molecular Weight Polyethylene Fiber,TQ342.61
  8. Genetic Analysis and Molecular Mapping of QTL for Rice Black-Streaked Dwarf Disease Resistance in Rice,S511
  9. Experiment and Research on Mathematics Layering Review for Junior High School Graduation Exam,G633.6
  10. Study on Chitosan-Based Composiate Nano-Coating Dope and Its Effect of Fresh-Keeping for Coated Egg,TS253.2
  11. Genetic Analysis and Mapping of the Mutant Locus of a Dwarf and Compact Spike Mutant NAUH164 from Wheat Variety Sumai 3,S512.1
  12. Construction of Molecular Linkage Map of (Wangshuibai×Alondra’s) RIL Population and Mapping of ESTs Related with Fusarium Head Blight Resistance,S512.1
  13. Inheritance of Main Traits Related to Yield and Quality, and Their QTL Mapping in Peanut (Arachis Hypogaea L.),S565.2
  14. Genetic Linkage Map Construction of Prunus. Kansuensis and Molecular Markers for Resistance to Root-Kont Nematode (Meloidogyne Incognita),S662.1
  15. The Related Study of Breast-conserving Surgery Plus Postoperative Tangential Irradiation,R737.9
  16. Construction of Linkage Genetic Map and Detection of QTL for Seven Agronomic Traits Including 100-seed Weight in Soybean (Glycine Max L. Merr.),S565.1
  17. Characterization and QTL Mapping of a High-tillering and Dwarf Mutant of Wheat Variety Wangshuibai,S512.1
  18. Studies on the Physiology and Biochemistry Characteristics and Fresh Keeping Technology of Post-Harvest in Pleurotus Eryngii,S646
  19. QTL Analysis of Salt Tolerance from Solanum Cheesmanii during Seed Germination and Seedling Stages Using Advanced Backcross Population,S641.2
  20. Construction of Molecular Genetic Map and Gene Mapping of Fruit Skin Color for Pyrus Pyrifolia Nakai,S661.2

CLC: > Agricultural Sciences > Gardening > Vegetable gardening > Fungi ( mushroom ) > Fold Agarics > Straw mushroom
© 2012 www.DissertationTopic.Net  Mobile