CN1124575A - Fresh-keeping process for red dates - Google Patents
Fresh-keeping process for red dates Download PDFInfo
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- CN1124575A CN1124575A CN 95113721 CN95113721A CN1124575A CN 1124575 A CN1124575 A CN 1124575A CN 95113721 CN95113721 CN 95113721 CN 95113721 A CN95113721 A CN 95113721A CN 1124575 A CN1124575 A CN 1124575A
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Abstract
The fresh-keeping method for red jujube technically features that the fresh jujubes that have been selected, washed and have surface water low-temp. dried are sealed, and they are then irradiated by gamma ray from Co-60 irradiation source, and this method has the advantages of simple process, low cost, long fresh-keeping period and no toxic by -effect.
Description
The invention belongs to the postharvest technology of fruits and vegetables field, be specifically related to a kind of red date fresh-keeping new method.
At present, the most frequently used fresh-keeping method is the antistaling agent fresh-keeping method both at home and abroad, the used antistaling agent of this method contains mostly to the disadvantageous material of health, and the red date nutrient composition there is adverse effect, its freshness date does not have significant difference with the result who handles without antistaling agent, as red date only about about 15 days with the fresh-keeping fresh keeping time of this method, no practical value.Another kind of preservation method commonly used is the exposed irradiation fresh-keeping methods of fruits and vegetables, and is because this simple irradiation preservation method has a series of correlation techniques to be difficult to solve, existing mostly only in the experimental stage, technology is still immature, fresh-keeping effect is very not obvious, and freshness date only has 10-20 days, can't enter the practical stage.The cardinal principle of simple exposed irradiation fresh-keeping method is to kill microorganism and its original molecule structure of change that fruits and vegetables carry with the form of gamma-ray irradiation fruits and vegetables, in the hope of reaching the purpose that prolongs storage period, but the following open defect of physical presence: 1, the germ-free condition of effect of irradiation formation is not taked effective protection measure, very fast quilt pollutes again in storage, fortune, pin process, the germ-free condition that irradiation forms can not keep for a long time, after polluting again, because action of microorganisms, fruits and vegetables can be in very short time endometamorphism corruption, thereby has lost the function and significance of irradiation; Though 2, simple irradiation has changed the original molecule structure of fruits and vegetables, though metabolism, breathe and be subjected to certain inhibition, also can play certain preservation, to some fruit individualities less (as red date, single fruit weight 5-15 grams; Grape, about 5 grams of single fruit weight) fruits and vegetables, although mashed, also can become dry fruit because of natural temperature, humidity factor influence and cross-ventilation act on natural air drying in very short time.Its fresh keeping time is very short, does not have significant difference with irradiation fruits and vegetables holding time not, does not have good effect.
Purpose of the present invention just is to have overcome above-mentioned the deficiencies in the prior art, and a kind of red date fresh-keeping new method is provided.
Purpose of the present invention is realized by following technical scheme and technology:
1, the principal character of this invention scheme and technology is: irradiation after " sealing+irradiation " and the sealing earlier;
2, the implementing method of this scheme is: select harvesting fresh intactly have no mechanical damage, the bright jujube (go-on-go is rogued) of free from insect pests, clean then, low temperature regularly dries when cleaning the moisture content attached to bright jujube surface, the sealing in the nontoxic bag that can play sealing function, (box or jar) of packing into after the classification, sealing should≤6 days apart from plucking day.Bright jujube after the sealing is made quantitative radiation treatment in order to cobalt-60 for the gamma-rays of irradiation bomb, irradiation finishes apart from answering≤4 days sealing day, effective, safe dose that bright jujube absorbs are 0.5KGY-4.0KGY, when absorbed dose of radiation reaches two of accumulated dose/for the moment, to be done 180 degree rotations by the bright jujube of irradiation, and make its absorbed dose of radiation evenly, accurately.
3, the technological process of this technical scheme is as follows:
Bright jujube → primary election → cleaning → low temperature is regularly dried effective, the security → finished product → warehouse-in that packs the quantitative irradiation of (box, jar) → single-piece metering → sealing → check sealing effectiveness → gamma-rays → check irradiation dose when cleaning attached to the moisture content → selected roguing → classification on bright jujube surface.
The principle of this invention:
One, the function of gamma-ray irradiation and effect:
1, gamma-rays has the ability of very strong penetrating material, can penetrate the surface and the material inside of packaging material and content product thereof, and can be to its generation effect.
2, the bright jujube of gamma-ray irradiation, series of chemical such as can produce ionization to it, excite can change the original molecule structure of bright jujube, thereby can suppress to breathe, metabolism, delay senility and reduce ripe speed, has tangible preservation.
When 3, the gamma-rays of doses passes material, can effectively kill bright jujube surface and inner pathogenic bacteria, bacterium, mould, other microorganism and worm's ovum, have good sterilization and antisepsis.
Two, Mi Feng effect:
1, has the effect of isolating bright jujube and outside hygienic conditions, can effectively prevent the pollution again behind the radiation sterilization.
2, sealing makes bright jujube and isolate from outer air, and the bright jujube in the bag (box or jar) is in certain, more stable gaseous state (oxygen and carbon dioxide) environment, and this environment has and suppresses that bright jujube is breathed, metabolism, delays senility and the effect of the ripe speed that slows down.
3, it also has protection against the tide and prevents the effect of natural air drying.
Three, " sealing+irradiation " and the effect of sealing back irradiation earlier:
" sealing+irradiation " and the most basic effect of sealing back irradiation technique scheme earlier are: make the chance and the condition that no longer there are repeated contamination by fresh-keeping article behind irradiation.
The present invention has the following advantages and good effect: the one, and fresh keeping time is long, effective, red date irradiation preservation technique is sophisticated to the practical stage from theoretical, experimental stage raising, and the bright jujube of handling through this invention technical scheme still had the original quality of fresh fruit, taste, physical features, nutrition in 180 days.When detecting in the 254th day behind the irradiation, its water content is 61.6%, total reducing sugar 20.05%, VC96.0mg/100g, Ca55.55mg/100g, Fe0.215mg/100g, protein 1.68%; The 2nd, technology is simple, can be on a large scale, on a large scale, produce in enormous quantities and processing; The 3rd, storage environment, condition there are not specific (special) requirements, can store at normal temperatures, do not stored the humidity in the environment and the influence of sanitary condition; The 4th, nontoxic, bacterium does not exceed standard, the 254th day testing result in the fresh-keeping back of irradiation for " total number of bacterial colonies (individual/g)＜10, coliform (individual/100g)＜30, pathogenic bacteria do not detect ", clean hygiene, and with chemical preservative, not comtaminated, the characteristics that can keep its natural green food meet current food consumption main flow feature; The 5th, equipment simple (except the irradiation apparatus), investment is little, input-output ratio big, increment amplitude big (can make bright jujube increment more than 66.24%).Use this technology, can produce high technology content, high-grade product, obtain the economic benefit of deep processing with the investment of preliminary working.
Embodiments of the invention are: choosing is plucked fresh intact have no mechanical damage and after the bright jujube of free from insect pests cleans, low temperature with≤55 ℃, when oven dry is cleaned in≤5 minutes time ranges attached to the moisture content on red date surface, from counting of harvesting, in 4 days, pack into and seal in the bag (box or jar), sealing back was that by fresh-keeping jujube the connected bag (box or jar) of irradiation bomb after to sealing made quantitative irradiation in order to cobalt-60 in 2 days, when the irradiation absorbed dose of radiation reaches two of accumulated dose/a period of time radiation exposed bright jujube is done 180 degree rotations, so that irradiation dose is evenly distributed, accurately, its gamma-ray irradiation absorbed dose of radiation that can reach best fresh-keeping effect is 0.9KGY-20KGY.Fresh-keeping jujube after above method is handled freshness date at normal temperatures can reach 9 first quarter moons.
Claims (3)
1, a kind of red date fresh-keeping new method is characterized in that:
Irradiation after a, " sealing+irradiation " and the sealing earlier;
B, technological process are: the moisture content → selected roguing → classification attached to bright jujube surface when bright jujube → primary election → cleaning → low temperature is regularly dried cleaning packs effective, the security → finished product → warehouse-in of (box or the jar) → quantitative irradiation of single-piece metering → sealing → check sealing effectiveness → gamma-rays → check irradiation dose;
Effective, safe dose that c, bright jujube absorb gamma-ray irradiation are 0.5KGY-40KGY;
D, sealing were answered≤6 days apart from harvesting day, and irradiation finishes apart from answering≤4 days sealing day.
2, a kind of red date fresh-keeping new method according to claim 1 is characterized in that: low temperature regularly bake out temperature is answered≤55 ℃, and drying time was answered≤5 minutes.
3, a kind of red date fresh-keeping new method according to claim 1, it is characterized in that: the gamma-ray irradiation absorbed dose of radiation that can reach best fresh-keeping effect is 0.95KGY-2.0KGY.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95113721 CN1124575A (en) | 1995-08-14 | 1995-08-14 | Fresh-keeping process for red dates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95113721 CN1124575A (en) | 1995-08-14 | 1995-08-14 | Fresh-keeping process for red dates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1124575A true CN1124575A (en) | 1996-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95113721 Pending CN1124575A (en) | 1995-08-14 | 1995-08-14 | Fresh-keeping process for red dates |
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| CN (1) | CN1124575A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062718C (en) * | 1998-06-05 | 2001-03-07 | 邓西民 | Freezing storage method for fresh date |
| CN1063927C (en) * | 1997-08-19 | 2001-04-04 | 中国肉类食品综合研究中心 | Method for making cooked food contg. meats with long shelf-life |
| CN101390533B (en) * | 2008-11-05 | 2011-05-04 | 陈兆喜 | Coconut hulling fresh-keeping process |
| CN102125237A (en) * | 2011-01-26 | 2011-07-20 | 中国农业大学 | Processing method of wash-free red dates |
| CN102172251A (en) * | 2011-03-24 | 2011-09-07 | 西南大学 | Method for prolonging preservation period of fresh konjak |
| CN104839314A (en) * | 2015-04-22 | 2015-08-19 | 江苏省农业科学院 | Fresh dasheen preservation method |
-
1995
- 1995-08-14 CN CN 95113721 patent/CN1124575A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1063927C (en) * | 1997-08-19 | 2001-04-04 | 中国肉类食品综合研究中心 | Method for making cooked food contg. meats with long shelf-life |
| CN1062718C (en) * | 1998-06-05 | 2001-03-07 | 邓西民 | Freezing storage method for fresh date |
| CN101390533B (en) * | 2008-11-05 | 2011-05-04 | 陈兆喜 | Coconut hulling fresh-keeping process |
| CN102125237A (en) * | 2011-01-26 | 2011-07-20 | 中国农业大学 | Processing method of wash-free red dates |
| CN102125237B (en) * | 2011-01-26 | 2012-10-10 | 中国农业大学 | Processing method of wash-free red dates |
| CN102172251A (en) * | 2011-03-24 | 2011-09-07 | 西南大学 | Method for prolonging preservation period of fresh konjak |
| CN104839314A (en) * | 2015-04-22 | 2015-08-19 | 江苏省农业科学院 | Fresh dasheen preservation method |
| CN104839314B (en) * | 2015-04-22 | 2018-03-06 | 江苏省农业科学院 | A kind of method for preserving of fresh taro |
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