CN102986863B - Compound freshness retaining method for pomes - Google Patents
Compound freshness retaining method for pomes Download PDFInfo
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- CN102986863B CN102986863B CN201210519792.4A CN201210519792A CN102986863B CN 102986863 B CN102986863 B CN 102986863B CN 201210519792 A CN201210519792 A CN 201210519792A CN 102986863 B CN102986863 B CN 102986863B
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Abstract
The invention discloses a compound freshness retaining method for pomes. The compound freshness retaining method is characterized by comprising the following steps of: determining the optimal irradiation dose according to the conductivity, and determining the optimal chitosan using amount according to the optimal irradiation dose. After freshness retaining liquid is prepared and is used for soaking film coating treatment; then irradiation is performed according to the optimal chitosan using amount, so that germs are killed, and physiological activities such as breathing of fruits and water loss are suppressed; and therefore, the aim of obviously improving the freshness retaining effect compared with that of the single chitosan film coating is fulfilled. By the method, the pome freshness retaining effect is obviously enhanced, and the chitosan using amount is reduced; the irradiation cost is lowered; and the environment is not polluted.
Description
Technical field
The present invention relates to a kind of fruit freshness preserving technology, the preservation method of the operatic circle that especially a kind of moisture content is large, specifically a kind of by the operatic circle composite fresh-keeping method that chitosan applies and irradiation combines.
Background technology
One of fruit that Li Shi China is important.Because moisture is higher, the moisture transpiration effect of being undertaken by the epidermal cell of evacuating after adopting is strong, easily occurs to rot during storage.After pear fruit harvesting, except selling immediately on a small quantity, great majority enter freezer stock.In the time of need to selling, then from freezer, go out fortune.Fruit is from outbound to selling to client's hand, nearly 1-2 week from the storehouse transhipment time.Now, the temperature of external environment, humidity, atmospheric condition all in the raw, are difficult to control.In addition the most of regional pear supplies of China are to adopt retail mode, open wide and peddle, the storage conditions of each stand varies.This section is that pear fruit rots and loss " high incidence period " from the storehouse time, is pear fruit fresh-keeping " blind spot ".Adopt safe and effective preservation technique to extend pear fruit shelf life, to reducing the loss of pear fruit product, improve pear fruit product quality, increasing profit on sales, significant.
Many experts and scholars have carried out broad research to its processing and storage technique.For the physiology of pears duration of storage, the feature of disease, fresh-keeping existing traditional indoor storage of pears, mound storage, the storage of canopy cellar for storing things, cave dwelling storage, the storage of ventilation storehouse, refrigeration, there are again air conditioned storage, radiation gamma preservation, ozone preservation, high-pressure electrostatic fresh-keeping, or the several different methods application that combines.These preservation methods all can reduce the loss of nutritional labeling, and the senescence process after slowing down pears and adopting extends the shelf life of pears.
Shitosan has safe, nontoxic, good filming performance, and shitosan fruit and vegetable preservation utilizes it at fruit and vegetable surfaces, form the water white film of one deck and realize.Shitosan can suppress the growth of several fungies, and the pellicle of formation can change fruit tissue internal gas and forms and reduce evaporating loss, and suppress fruit and rot, be the desirable Perserving materials of fruit.The relevant report with chitosan coating fruit and vegetable preservation is a lot, but in the market, has at normal temperatures the chitosan coating fresh-keeping liquid of significant prolongation fruit shelf life also rarely found.Main cause is: 1) different fruit has different storing properties, and specific fruit is carried out need to considering when fresh-keeping the problems such as water-soluble, the film of film and the adhesion property between fruit, optimization formula.2) when selecting fresh-keeping liquid concentration, often to make repeated attempts.When plastics concentration is too low, the film that is coated in fruit surface is too thin, and choke effect is bad; When plastics excessive concentration, the viscosity of fresh-keeping liquid is bigger than normal, is not easy to be dried after being coated in fruit surface, easily grows microorganism, also easily causes filming inhomogeneous, and the blocked up respiratory intensity that also can affect fruit of filming, accelerates the rotten process of fruit on the contrary.3) mechanical strength of film is influential in transfer process to fruit.In a word, the fresh-keeping effect of chitosan coating fresh-keeping liquid can not meet market demands.
Radiotechnology is a kind of pollution-free food process technology.Because it has non-environmental-pollution deposits yields,, the advantage such as do not heat up residual without material, over nearly more than 20 years at food sterilization desinsection, suppress potato garlic and germinate and extend in the aspects such as meat products shelf life and be used widely.Within 2011, China's food irradiation year treating capacity has reached 200,000 tons.But apply this technical finesse fruit and only limit to so far fruit import and export quarantine.This technology is applied to pear fresh preservation and has proved the generating capacity that can suppress endogenous ethylene, reduce respiratory intensity, postpone the appearance of respiratory climacteric, reduce the natural wastage that the factors such as respiratory metabolism cause, and there is sterilization effect, reduce mouldy rate and rotting rate, thereby extend the operatic circle shelf life.But practical application still exists some to have difficulty to be overcome: as irradiation destroy cell membrane integrality, make Vc loss.Having test to show, adopt gamma-ray irradiation Kuerle delicious pear, can make fruit internal depth softening during the super 5kGy of dosage, there is hole in pulp organization, even makes pericarp burn, produces foxiness; The too low effect of killing the pathogenic contaminated bacteria of fruit surface that do not reach again of dosage.Thereby, reduce and select suitable irradiation dose the application in pear fruit storage is fresh-keeping is a very important ring for this technology.
As can be seen here, the difficulty that single irradiation or shitosan preservation technique all exist some to be difficult to overcome in the fresh-keeping application of the operatic circle.
Summary of the invention
The object of the invention is in the fresh-keeping application of the operatic circle, to be all difficult to reach for single irradiation or shitosan preservation technique the problem in fresh-keeping cycle of expection, design and a kind ofly can reduce chitosan consumption, the shitosan that can prolong storage period again applies the operatic circle composite fresh-keeping method combining with irradiation.
Technical scheme of the present invention is:
A composite fresh-keeping method, is characterized in that it comprises the following steps:
First, determine the best irradiation dose for the treatment of fresh-keeping the operatic circle, some parts of fresh-keeping the operatic circle is treated in extraction, wherein at least portion does not carry out irradiation as a control group, remaining is treated to fresh-keeping the operatic circle takes different irradiation doses to carry out irradiation, sampling and measuring relative conductivity immediately after irradiation finishes, get relative conductivity than irradiation group that irradiation group increases 8-12% as the suitableeest fresh-keeping irradiation group, corresponding irradiation dose is chosen to be dose,optimum and is denoted as D;
Secondly, according to determined dose,optimum, by following decision rule, determine the percentage by weight of shitosan in fresh-keeping liquid:
1) D≤0.8 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 1.2-1.5%;
2) 0.8 kGy <D<2.0 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 1.0-1.2%;
3) D >=2.0 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 0.8-1.0%;
The 3rd, according to the percentage by weight of the definite shitosan of decision rule, prepare according to a conventional method fresh-keeping liquid; Shitosan used is bread and cheese level shitosan, and deacetylation is greater than 85%, and carboxy methylation or n-trimethyl chitosan chloride are better;
The 4th, the dose,optimum definite by the first step carries out irradiation to the operatic circle after fresh-keeping liquid immersion treatment; Make the physiology process until fresh-keeping the operatic circle has not only delayed the operatic circle harvesting by filming after, and by the further sterilization of radiation treatment and suppress respiration of fruits and the physiological activity of dehydration, thereby the freshness date of the operatic circle is all significantly increased than single chitosan coating or single irradiation.
During definite best irradiation dose until fresh-keeping the operatic circle, adopt the principle of dosage escalation to carry out, the irradiation dose scope of using is 0.2-5.0kGy.
The quantity of the operatic circle extracting while determining the best irradiation dose until fresh-keeping the operatic circle is no less than 27, is at least divided into 9 groups, and the dosage irradiation of 9 groups is followed successively by 0,0.2,0.4,0.6,0.8,1.0,2.0,3.0,5.0kGy.
Described irradiation is for adopting electron beam or Dynarad to carry out treatment with irradiation to the operatic circle.
beneficial effect of the present invention:
1, fresh-keeping effect significantly strengthens.General 10% left and right that extends of single chitosan coating the operatic circle shelf life, simple radiation treatment extends 8% left and right, the physiological activity effects such as the existing inhibition respiration of fruits of technique of the present invention and dehydration have again sterilizing function, the shelf-life of processed group extends 30% than control group, because the index of quality of the less the operatic circle of irradiation dose is without marked change.
2, strengthening bactericidal effect.First, shitosan itself can induce fruit tissue to produce defense reaction, the activity of antibiotic enzyme in active cell, the disease resistance of raising fruit.Meanwhile, with regard to radiation sterilizing technology, the Chitosan Film in Food Preservation forming on the operatic circle is again the isolation barrier of one deck contaminated bacteria, avoids the secondary pollution after fruit irradiation sterilization.
3, compare with single filming, reduced chitosan dosage.The consumption of general chitosan coating is in 2% left and right, and technique chitosan dosage of the present invention, between 0.8%-1.5%, can be saved shitosan raw material 25%-60%.This is because irradiation ratio is filmed and had physiological activity effects such as suppressing more significantly respiration of fruits and dehydration, is especially storing the later stage, thereby is reducing film layer thickness.
4, reduce irradiation dose, not only saved irradiation cost but also reduce the damage to fruit.From the sterilization needs of fruit, irradiation dose should be more than 5.0kGy, and technique irradiation dose of the present invention is 0.2-3.0kGy.High dosage irradiation reduces the hardness of fruit, and Vc loss, even induces brown abnormal pigmentary deposit on the skin.
5, irradiation technique facilitates feasible.The operatic circle film after bagging
→dress up FCL irradiation
→store at normal temperatures
→sell, be suitable for producing in batches operation.
6, green, safe, pollution-free.Shitosan is natural material, and irradiation is again green processing technology, and the two combines not only without chemical residue but also environmental pollution, safe and reliable.
7, the present invention finds to using that by great many of experiments electrical conductivity, as judging the definite foundation of best irradiation dose, can reach and prolong storage period, and can guarantee again mouthfeel and the hardness of the operatic circle, can also reduce costs the consumption of very high shitosan simultaneously.This is because integrated degree and the stability of the height reacting cells film of cell leakage represent the situation that cell or tissue is hurt to a certain extent.Relative conductivity is the important indicator of response organization's cell leakage.Irradiation is shown in Fig. 1 to the impact of pear fruit relative conductivity and pears quality.Within the scope of 0-5kGy, along with the increase of irradiation dose, the relative conductivity of imperial crown and Kuerle pear fruit tissue raises, pear fruit quality (hardness, color and luster, mouthfeel) phase strain differential.When relative conductivity increases to 10%, imperial crown pears and Kuerle pears absorbed dose of radiation are respectively 1.0kGy, 3.0kGy, and pear fruit quality is respectively 83 minutes, 86 minutes.There are some researches prove, the average absorbed dose of fruits and vegetables class sprout inhibition, after-ripening is 0.1-3.0kGy(food irradiation process principle and technology [M], Shi Peixin, 2004).In conjunction with pear fruit irradiation, kill the lowest dose level requirement of the pathogenic bacteria such as Escherichia coli, salmonella, can determine that the suitableeest irradiation dose scope of pear fruit is 0.2-3.0kGy, and the suitableeest irradiation dose definite is that to take the absorbed dose of radiation of relative conductivity when irradiation does not increase by 10% be standard.
The chitosan dosage of single chitosan coating is in 2% left and right.By aforementioned, chitosan coating pear fruit has the multiple effect such as suppress respiration of fruits, enhance disease resistance.Since radiation treatment also has said function, apparent, last part technology---fruit radiation treatment can reduce FEOL---chitosan dosage of chitosan coating, irradiation has and strengthens the effect effect of filming.Test shows, is not changing under the prerequisite of pear fruit fresh-keeping effect, and chitosan dosage is minimum drops to 0.8%.
8, the present invention has also determined the best relation between irradiation dose and chitosan dosage by a large amount of experiments, for each dosage section provides best chitosan dosage.
Accompanying drawing explanation
Fig. 1 is the affect schematic diagram of the irradiation that carries out of the present invention on the operatic circle (imperial crown pears, Kuerle pears) relative conductivity and pears quality.In figure: E represents pear fruit relative conductivity; Q represents the scoring of pear fruit quality.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
A composite fresh-keeping method, it comprises the following steps:
1, first determine the suitableeest fresh-keeping radiation treatment dosage and chitosan dosage: select disease-free, without 27 of brown abnormal pigmentary deposit on the skin, even, the of the same size pear fruits of color and luster, be divided into 9 groups, from 0 to 5.0 kGy carries out ascending-dose irradiation (as 0,0.2,0.4,0.6,0.8,1.0,2.0,3.0,5.0kGy), immediately sampling and measuring relative conductivity.Getting relative conductivity increases by 10% irradiation group as the suitableeest fresh-keeping irradiation group than irradiation group not, and corresponding irradiation dose is chosen to be dose,optimum (being denoted as D).Pear fruit radiation treatment adopts electron beam or γ irradiation irradiation devices; Shitosan is bread and cheese level shitosan, and deacetylation is greater than 85%, and carboxy methylation or n-trimethyl chitosan chloride are better.
2, according to measured the suitableeest fresh-keeping radiation treatment dosage, by following rule, determine the consumption of the best shitosan in fresh-keeping liquid:
1) D≤0.8 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 1.2-1.5%;
2) 0.8 kGy <D<2.0 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 1.0-1.2%;
3) D >=2.0 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 0.8-1.0%;
3, according to the decision rule of the first step the suitableeest determined fresh-keeping radiation treatment dosage and second step, preparation chitosan, and with addition of mass percent, be that 1-2% acetic acid dissolves in chitosan, mass percent is 0.35% sodium chloride, mass percent is 2% Tween-80, add water, make fresh-keeping liquid.
4, the operatic circle after plucking is immersed in to 1-2 minute in fresh-keeping liquid, pulls out, air-dry, bagging, vanning.
5, the FCL the operatic circle of having filmed is sent into irradiation station and processed, control irradiation dose within the scope of 0.2-3.0kGy.
6, the operatic circle after irradiation is placed under normal temperature and stores.
example 1.
Pears kind is imperial crown pears, and chitosan main material is intended adopting n-trimethyl chitosan chloride, and deacetylation is greater than 85%.Radiation treatment dosage and chitosan dosage are determined: select disease-free, without 27 of brown abnormal pigmentary deposit on the skin, even, the of the same size imperial crown pear fruits of color and luster, be divided into 9 groups, carry out various dose processing, after measured, 1.0kGy processed group relative conductivity increases by 10% than control group (not irradiation), so chitosan dosage can be 1.0%-1.2%.In 1% acetic acid aqueous solution, add 1% shitosan, 0.35% sodium chloride, 2% Tween-80, makes fresh-keeping liquid.The operatic circle is immersed in fresh-keeping liquid to 1 minute, pulls out, air-dry, bagging, vanning, irradiation 1.0kGy, the imperial crown the operatic circle after irradiation is placed under 20-25 C and stores.Freshness date can extend 20 days.As the control group of the present embodiment, in fresh-keeping liquid, the content of shitosan freshness date lower than 1.0% time does not only extend, and slightly declines on the contrary, and while surpassing 1.2%, freshness date is without obvious increase.The content of shitosan is between 1.0%-1.2% time, and freshness date extends best results.
example 2.
Pears kind is for liking to delay pears, and chitosan main material intends adopting bread and cheese level shitosan, and deacetylation is greater than 85%.Radiation treatment dosage and chitosan dosage are determined: select disease-free, without delay 27 of pear fruits of brown abnormal pigmentary deposit on the skin, even, the of the same size love of color and luster, be divided into 9 groups, carry out various dose processing, after measured, 0.9kGy processed group relative conductivity increases by 8% than control group (not irradiation), so chitosan dosage can be 1.0%-1.2%.In 1% acetic acid aqueous solution, add 1.0% shitosan, 0.35% sodium chloride, 2% Tween-80, makes fresh-keeping liquid.The operatic circle is immersed in fresh-keeping liquid to 1 minute, pulls out, air-dry, bagging, vanning, irradiation 0.9kGy, the operatic circle of delaying is placed under 18-25 C and stores the love after irradiation.Freshness date can extend 25 days.As the control group of the present embodiment, in fresh-keeping liquid, the content of shitosan freshness date lower than 1.0% time obviously declines, and while surpassing 1.2%, freshness date is without obvious increase.The content of shitosan is between 1.0%-1.2% time, and freshness date extends best results.
example 3.
Pears kind is Dangshan pear, and chitosan main material intends adopting Carboxymethyl chitosan.Radiation treatment dosage and chitosan dosage are determined: select disease-free, without 27 of brown abnormal pigmentary deposit on the skin, even, the of the same size Dangshan pear fruits of color and luster, be divided into 9 groups, carry out various dose processing, after measured, 0.6kGy processed group relative conductivity increases by 12% than control group (not irradiation), so chitosan dosage can be 1.2-1.5%.In 1% acetic acid aqueous solution, add 1.3% shitosan, 0.35% sodium chloride, 2% Tween-80, makes fresh-keeping liquid.The operatic circle is immersed in fresh-keeping liquid to 1 minute, pulls out, air-dry, bagging, vanning, irradiation 0.6kGy, the Dangshan the operatic circle after irradiation is placed under 18-25 C and stores.Freshness date can extend 20 days.As the control group of the present embodiment, in fresh-keeping liquid, the content of shitosan freshness date lower than 1.2% time is suitable with conventional method, and while surpassing 1.5%, freshness date is without obvious increase.The content of shitosan is between 1.2%-1.5% time, and freshness date extends best results.
example 4.
Pears kind is abundance of water pears, and chitosan main material intends adopting bread and cheese level shitosan, and deacetylation is greater than 85%.Radiation treatment dosage and chitosan dosage are determined: select disease-free, without 27 of brown abnormal pigmentary deposit on the skin, even, the of the same size abundance of water pear fruits of color and luster, be divided into 9 groups, carry out various dose processing, after measured, 0.3kGy processed group relative conductivity increases by 9% than control group (not irradiation), so chitosan dosage can be 1.2-1.5%.In 1% acetic acid aqueous solution, add 1.3% shitosan, 0.35% sodium chloride, 2% Tween-80, makes fresh-keeping liquid.The operatic circle is immersed in fresh-keeping liquid to 1 minute, pulls out, air-dry, bagging, vanning, irradiation 0.3kGy, the abundance of water the operatic circle after irradiation is placed under 20-25 C and stores.Freshness date can extend 20 days.
example 5.
Pears kind is Jinhua Pear, and chitosan main material intends adopting bread and cheese level shitosan, and deacetylation is greater than 85%.Radiation treatment dosage and chitosan dosage are determined: select disease-free, without 27 of brown abnormal pigmentary deposit on the skin, even, the of the same size Jinhua Pear fruits of color and luster, be divided into 9 groups, carry out various dose processing, after measured, 0.85kGy processed group relative conductivity increases by 11% than control group (not irradiation), so chitosan dosage can be 1.0-1.2%.In 1% acetic acid aqueous solution, add 1.0% shitosan, 0.35% sodium chloride, 2% Tween-80, makes fresh-keeping liquid.The operatic circle is immersed in fresh-keeping liquid to 1 minute, pulls out, air-dry, bagging, vanning, irradiation 0.85kGy, the golden flower the operatic circle after irradiation is placed under 20-25 C and stores.Freshness date can extend 20 days.
example 6.
Pears kind is new peak pears, and chitosan main material intends adopting n-trimethyl chitosan chloride.Radiation treatment dosage and chitosan dosage are determined: select disease-free, without 27 of brown abnormal pigmentary deposit on the skin, even, the of the same size new peak pear fruits of color and luster, be divided into 9 groups, carry out various dose processing, after measured, 2.2kGy processed group relative conductivity increases by 10% than control group (not irradiation), so chitosan dosage can be 0.8-1.0%.In 1% acetic acid aqueous solution, add 0.8% shitosan, 0.35% sodium chloride, 2% Tween-80, makes fresh-keeping liquid.The operatic circle is immersed in fresh-keeping liquid to 1 minute, pulls out, air-dry, bagging, vanning, irradiation 2.2kGy, the new peak the operatic circle after irradiation is placed under 18-25 C and stores.Freshness date can extend 25 days.As the control group of the present embodiment, in fresh-keeping liquid, the content of shitosan freshness date lower than 0.8% time obviously declines, and while surpassing 1.0%, freshness date is without obvious increase.The content of shitosan is between 0.8%-1.0% time, and freshness date extends best results.
example 7.
Pears kind is tribute pears, and chitosan main material intends adopting bread and cheese level shitosan, and deacetylation is greater than 85%.Radiation treatment dosage and chitosan dosage are determined: select disease-free, without 27 of brown abnormal pigmentary deposit on the skin, even, the of the same size tribute pear fruits of color and luster, be divided into 9 groups, carry out various dose processing, after measured, 0.2kGy processed group relative conductivity increases by 8% than control group (not irradiation), so chitosan dosage can be 1.2-1.5%.In 1% acetic acid aqueous solution, add 1.2% shitosan, 0.35% sodium chloride, 2% Tween-80, makes fresh-keeping liquid.The operatic circle is immersed in fresh-keeping liquid to 1 minute, pulls out, air-dry, bagging, vanning, irradiation 0.2kGy, the tribute the operatic circle after irradiation is placed under 20-25 C and stores.Freshness date can extend 15 days.As the control group of the present embodiment, in fresh-keeping liquid, the content of shitosan freshness date lower than 1.2% time obviously declines, and while surpassing 1.5%, freshness date is without obvious increase.The content of shitosan is between 1.2%-1.5% time, and freshness date extends best results.
example 8.
Pears kind is Kuerle pears, and chitosan main material intends adopting n-trimethyl chitosan chloride.Radiation treatment dosage and chitosan dosage are determined: select disease-free, without 27 of brown abnormal pigmentary deposit on the skin, even, the of the same size Kuerle of color and luster pear fruits, be divided into 9 groups, carry out various dose processing, after measured, 3.0kGy processed group relative conductivity increases by 10% than control group (not irradiation), so chitosan dosage can be 0.8-1.0%.In 2% acetic acid aqueous solution, add 0.9% shitosan, 0.35% sodium chloride, 2% Tween-80, makes fresh-keeping liquid.The operatic circle is immersed in fresh-keeping liquid to 1 minute, pulls out, air-dry, bagging, vanning, irradiation 3.0kGy, the Kuerle the operatic circle after irradiation is placed under 18-25 C and stores.Freshness date can extend 28 days.As the control group of the present embodiment, in fresh-keeping liquid, the content of shitosan freshness date lower than 0.8% time obviously declines, and while surpassing 1.0%, freshness date is without obvious increase.The content of shitosan is between 0.8%-1.0% time, and freshness date extends best results.
Percentage in embodiment 1-8 is mass percent.
The part that the present invention does not relate to all prior art that maybe can adopt same as the prior art is realized.
Claims (4)
1. a operatic circle composite fresh-keeping method, is characterized in that it comprises the following steps:
First, determine the best irradiation dose for the treatment of fresh-keeping the operatic circle; Some parts of fresh-keeping the operatic circle is treated in extraction, wherein at least portion does not carry out irradiation as a control group, remaining is treated to fresh-keeping the operatic circle takes different irradiation doses to carry out irradiation, sampling and measuring relative conductivity immediately after irradiation finishes, get the relative conductivity ratio irradiation group that irradiation group does not increase 8-12% as the suitableeest fresh-keeping irradiation group, corresponding irradiation dose is chosen to be dose,optimum and is denoted as D;
Secondly, according to determined dose,optimum, by following decision rule, determine the percentage by weight of shitosan in fresh-keeping liquid:
1) D≤0.8 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 1.2-1.5%;
2) 0.8 kGy <D<2.0 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 1.0-1.2%;
3) D >=2.0 kGy, the percentage by weight of the shitosan in fresh-keeping liquid is 0.8-1.0%;
The 3rd, according to the percentage by weight of the definite shitosan of decision rule, prepare fresh-keeping liquid and make fresh-keeping liquid;
The 4th, the dose,optimum definite by the first step carries out irradiation to the operatic circle after fresh-keeping liquid immersion treatment; Make the physiology process until fresh-keeping the operatic circle has not only delayed the operatic circle harvesting by filming after, and by the further sterilization of radiation treatment and suppress respiration of fruits and the physiological activity of dehydration, thereby the freshness date of the operatic circle is all significantly increased than single chitosan coating or single irradiation.
2. method according to claim 1, adopts the principle of dosage escalation to carry out while it is characterized in that definite best irradiation dose until fresh-keeping the operatic circle, and the irradiation dose scope of using is 0.2-5.0kGy; Described shitosan is bread and cheese level shitosan.
3. method according to claim 1, the quantity of the operatic circle extracting while it is characterized in that definite best irradiation dose until fresh-keeping the operatic circle is no less than 27, at least be divided into 9 groups, the dosage irradiation of 9 groups is followed successively by 0,0.2,0.4,0.6,0.8,1.0,2.0,3.0,5.0kGy.
4. method according to claim 1, is characterized in that described irradiation is for adopting electron beam or Dynarad to carry out treatment with irradiation to the operatic circle.
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| CN103404585B (en) * | 2013-06-28 | 2015-09-09 | 句容市后白镇玉琴果品专业合作社 | A kind of fresh-keeping preparation of non-harmful pears and preservation method thereof |
| CN103651775B (en) * | 2013-12-06 | 2015-04-01 | 中国农业科学院农产品加工研究所 | Blueberry preservation method |
| CN105767133A (en) * | 2016-03-09 | 2016-07-20 | 广西鹿寨县绿享科技有限责任公司 | Freshness preservation method of passion fruits |
| CN107637652A (en) * | 2017-11-19 | 2018-01-30 | 山东明鑫集团有限公司 | A kind of store method of kelp food |
| CN115968936A (en) * | 2022-11-25 | 2023-04-18 | 苏州中核华东辐照有限公司 | Irradiation sterilization treatment method for plastic packaged fruits and application of method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220832A (en) * | 1997-12-25 | 1999-06-30 | 陈方 | Cold-storage and fresh-keeping method for sweet pear |
| EP1082016B1 (en) * | 1998-06-05 | 2002-09-25 | Biotechnology Research And Development Corporation | Biological coating with a protective and curative effect for the control of postharvest decay |
| CN102669253A (en) * | 2012-06-07 | 2012-09-19 | 临沂兴大工程有限责任公司 | Vegetable sterilization method |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220832A (en) * | 1997-12-25 | 1999-06-30 | 陈方 | Cold-storage and fresh-keeping method for sweet pear |
| EP1082016B1 (en) * | 1998-06-05 | 2002-09-25 | Biotechnology Research And Development Corporation | Biological coating with a protective and curative effect for the control of postharvest decay |
| CN102669253A (en) * | 2012-06-07 | 2012-09-19 | 临沂兴大工程有限责任公司 | Vegetable sterilization method |
Non-Patent Citations (1)
| Title |
|---|
| 壳聚糖涂膜保鲜香梨的研究;傅乐峰，等;《食品工业》;20051231(第2期);第57-58页 * |
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