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A Method Of Preserving The Green Color Of Blanched Beanstalk Stored At Room Temperature

Posted on:2005-10-10Degree:MasterType:Thesis
Country:ChinaCandidate:Y HanFull Text:PDF
GTID:2121360125950779Subject:Agricultural Products Processing and Storage
Abstract/Summary:PDF Full Text Request
This subject is the son program of the warship vegetable fresh-keeping program of theMunitions University of PLA. Vegetable is people the indispensable food article in life andit takes very important role in the meal structure of people. America implemented "3high"(High heating quantity, high fat, high protein) meal structure after World War II, as aresult, caused "civilized disease" to overflow, so that it had to take forty billions dollarsevery year afterwards deal with "civilized disease". Therefore a lot of western nutritionistsgave high appraisement to china's the meal structure of green kind mainly with vegetableof set. Vegetable is one of foods that people of our country most like; it's also the firstclass food mainly to battlefield soldier of sergeant. But under room temperature,vegetables do not be easy to preserve. Now the best is also that the most general vegetablefresh-keeping method is to use angry tune deposit or the deposit of low temperature, thistwo deposit methods is put in, cost is plenty and losses high, the present development levelof our country is nearly impossible to popularize, it has caused high losses every year, andthis two deposit way of conditions do not meet armed forces harshly for the food conditionof field operation that stored under room temperature for a long period. Therefore we willdevelop the method of the deposit vegetable of normal temperature continuously so as tosuit a fight for warship out of the sea for a long period and the supply of vegetable tosoldier of poor transportation in inconvenient area. Vegetable contains rich nutrition composition, it's the indispensable composition inhuman food, but vegetable contains plenty of moistures, and after gains it still breathescontinuously to consume. This way is easy to infect microorganism very much, suffer insecthurt with chlorophyll degradation caused maximum loss, and the vegetable seasonal is verystrong and the consumption manpower on improving the culture management of materialresources in vegetable production does not be easy to get 10% yet or 20% increase production.Now, it is angry tune deposit to store the most easily to do law of green vegetable and also a70ABSTRACTbig investment covers a large area, application scope is narrow. It's hard to popularize for thepresent economic level of our country with development condition. According to statistics inour country vegetable loss rate is as high as 40% ~ 50% after picking and merchandise lossrate exceeds 30% , makes one startling. Therefore to solve the problem in processing andstoring fruit and vegetable under room temperature successfully is economic for improvementpeople's living standard and solid rural economy; make prosperous town market, satisfy theneeds of foreign trade, the aspects such as the logistics guarantee of armed forces have veryimportant meaning. And the vegetable deposit of room temperature in protect green problemhave became the bottleneck of fresh-keeping obstruction and vegetable processing is also worldbaffling problem. Now, the method of the fresh-keeping vegetable under room temperature has not beensolved successfully yet. In the research of the persons such as Donato, have adopted thezinc ion of higher quality grade (is higher than 500 mg/kg), is very hot handling short (losein 3 min) bleach, green vegetable go through caned kill bacterium or is dried after, canmaintain its original color for a long period. But in vegetable, zinc ion quality grade ishigher than 75 mg/kg. The feasible channel of another strip is to protect color with surfaceactivator and zinc alliance, in form chlorophyll metal ion Luo join thing, with propersurface activator with promote chlorophyll metal Luo join thing form, reduce vegetable inremain the content in metal. The persons such as Theuer in the research of this respect is inthe lead level, they adopt disaster dissolve the zinc salts of fatty acid such as the tristearinacid of sex, as well as the handl...
Keywords/Search Tags:blanched beanstalk, protect green color of soda processing, roomtemperature store, chlorophyll, NaHCO3, cane sugar, food additive
PDF Full Text Request
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