CN108260660A - A kind of preservation method of sun lotus and application - Google Patents
A kind of preservation method of sun lotus and application Download PDFInfo
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- CN108260660A CN108260660A CN201810050283.9A CN201810050283A CN108260660A CN 108260660 A CN108260660 A CN 108260660A CN 201810050283 A CN201810050283 A CN 201810050283A CN 108260660 A CN108260660 A CN 108260660A
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- 235000006510 Nelumbo pentapetala Nutrition 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000004321 preservation Methods 0.000 title claims abstract description 33
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- 201000010099 disease Diseases 0.000 claims abstract description 11
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims abstract description 11
- 238000005138 cryopreservation Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 23
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 9
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- 239000000243 solution Substances 0.000 description 35
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- 125000003047 N-acetyl group Chemical group 0.000 description 1
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- 244000061458 Solanum melongena Species 0.000 description 1
- FPIPGXGPPPQFEQ-BOOMUCAASA-N Vitamin A Natural products OC/C=C(/C)\C=C\C=C(\C)/C=C/C1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-BOOMUCAASA-N 0.000 description 1
- 229930003268 Vitamin C Natural products 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 241000963384 Zingiber mioga Species 0.000 description 1
- 241000310096 Zingiber striolatum Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- FPIPGXGPPPQFEQ-OVSJKPMPSA-N all-trans-retinol Chemical compound OC\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-OVSJKPMPSA-N 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- MSWZFWKMSRAUBD-UHFFFAOYSA-N beta-D-galactosamine Natural products NC1C(O)OC(CO)C(O)C1O MSWZFWKMSRAUBD-UHFFFAOYSA-N 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
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- 238000004320 controlled atmosphere Methods 0.000 description 1
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- 238000006297 dehydration reaction Methods 0.000 description 1
- 206010012601 diabetes mellitus Diseases 0.000 description 1
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 229960002442 glucosamine Drugs 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 229930182478 glucoside Natural products 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000002846 norbornadienes Chemical class 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
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- 230000005068 transpiration Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 235000019155 vitamin A Nutrition 0.000 description 1
- 239000011719 vitamin A Substances 0.000 description 1
- 235000019154 vitamin C Nutrition 0.000 description 1
- 239000011718 vitamin C Substances 0.000 description 1
- 229940045997 vitamin a Drugs 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids
- A23B7/154—Organic compounds; Microorganisms; Enzymes
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/04—Freezing; Subsequent thawing; Cooling
- A23B7/0425—Freezing; Subsequent thawing; Cooling the material not being transported through or in the apparatus, with or without shaping, e.g. in the form of powder, granules or flakes
- A23B7/0433—Freezing; Subsequent thawing; Cooling the material not being transported through or in the apparatus, with or without shaping, e.g. in the form of powder, granules or flakes with packages or with shaping in the form of blocks or portions
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Microbiology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a kind of preservation method of positive lotus, the preservation method of the sun lotus includes the following steps：1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；2) positive lotus is immersed in the chitosan solution of a concentration of 0.5~1.2% grams per milliliter, impregnates 1~8 minute, pull out, dry；3) the positive lotus dried is placed in the space of a concentration of 0.5~1.5 microlitre/liter of 1 methyl cyclopropene and fumigated 6~15 hours, the positive lotus cryopreservation after fumigating.The invention also discloses a kind of application of preservation method of positive lotus in terms of the positive lotus shelf-life is extended.Preservation method provided by the invention can effectively extend the shelf-life of positive lotus, and the shelf-life can extend to 45~70 days, and can retain positive lotus intrinsic flavor and nutritive value, while operating method is simple, safe and at low cost.
Description
Method field
The present invention relates to agricultural products fresh-keeping technical fields, and in particular to a kind of preservation method of sun lotus and application.
Background method
Positive lotus (Zingiber striolatum Diels) is Zingiber zingiber herbaceos perennial, You Ming Zingiber miogas, open country
Ginger, monkey ginger, wild old ginger, are a kind of edible wild herbs of integration of drinking and medicinal herbs, and the tender shoots tender stem cone bamboo shoot tongue that the positive lotus early spring is formed is positive lotus bamboo shoot,
Its top is in aubergine, and basal part of stem color gradually bleaches, and for single fresh bamboo shoot weight up to 200 grams or more, length can after artificial cultivation
Up to 30 centimetres.The maturity period of positive lotus bud is concentrated mainly on the summer in 7~October.Positive lotus complete stool has unique fragrance, branch
Leaf, rhizome, flowers and fruits can be full of nutrition with wind-expelling pain-stopping, clear swollen removing toxic substances, relieving cough and asthma, tender shoots, stem fruit delicious flavour, according to grinding
Record is studied carefully, per 100g sun lotus tender stems and the anti-2.2g of petal 12.4g containing protein, fat, cellulose 28.1g, vitamin C and vitamin
A is total to about 95.85mg, also containing the various trace elements such as iron, zinc, selenium and aromatic ester etc..Wherein, institute's containing cellulose is that one kind is not produced
The holoside nutrient substance of heat energy, disperse accumulation stomach invigorating are conducive to keep alimentary canal unobstructed, can treat constipation, have special efficacy to diabetes,
It is often edible, it can keep fit and healthy, the moist colour of skin, slow down aging, there is high medical value.
Since the positive lotus maturity period is concentrated mainly on high temperature in 7~October, high humidity season, picking time is short, and adopts rear respiratory metabolism
It is vigorous, it consumes a large number of nutrients and leads to aging.The freshness date of positive lotus is only 1~2 day under room temperature, over time,
Most of sun lotuses start gradual dehydration, discoloration, and 7 days or so i.e. all rotten rotten, loses edible value and commodity value, seriously
Influence the economic interests of vegetable grower.
Previous people mostly using marinated and brine it is canned the methods of extend supply phase and the expansion extent of supply, although energy
Enough economic benefits for improving positive lotus, still, these methods more or less affect to a certain extent the intrinsic flavor of positive lotus and
Nutritive value.At present, the fresh-keeping mode of use has cryopreservation fresh-keeping and controlled atmosphere storage, but these preservation methods exist and throw
Money is big, popularize difficulty, fresh-keeping effect is limited, preservation is costly, has the problems such as chemical residue.Therefore, research and development one kind can
Effectively extend the positive lotus shelf-life, and its intrinsic flavor and nutritive value can be retained, while operating method is simple, safety and cost
The preservation method of low positive lotus has very big application value and commercial promise.
Invention content
So-called sun lotus refers to positive lotus bamboo shoot and/or positive lotus bud in content below the application.
The purpose of the present invention is to provide a kind of shelf-life that can effectively extend positive lotus and retain the intrinsic wind of positive lotus
Taste and nutritive value, while operating method is simple, the preservation method of safe and at low cost positive lotus and application, it is existing to solve
Technology there are the problem of.
Specifically, to achieve the above object, the first aspect of the present invention provides a kind of preservation method of positive lotus, the sun
The preservation method of lotus includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 0.5~1.2% grams per milliliter, impregnated 1~8 minute, fishing
Go out, dry；
3) the positive lotus dried is placed in the space of a concentration of 0.5~1.5 microlitre/liter of 1- methyl cyclopropenes and fumigates 6~15
Hour, the positive lotus cryopreservation after fumigating.
Further, step 3) replaces with：3 ') that the positive lotus dried is placed in 1- methyl cyclopropenes a concentration of 0.5~1 is micro-
In freshness protection package/crisper of liter/liter, sealing storage.
Further, in step 2), the temperature of drying dried is 15~18 DEG C, and flash-off time is 1~1.5 hour.
Further, in step 3), before fumigate, the positive lotus dried is subjected to layering and divides processing.
Further, in step 3), after fumigating, positive lotus is fitted into freshness protection package, is then 2~6 in refrigerated storage temperature
DEG C, relative humidity is stored under conditions of being 80~90%.
Further, the chitosan solution preparation method is：0.5~1.2 gram of chitosan is weighed, is dissolved in
100 milliliters of pH are in 3.5~4.2 glacial acetic acid solution, and stir evenly, and obtain a concentration of 0.5~1.2% grams per milliliter
Chitosan solution.
The second aspect of the present invention provides a kind of preservation method answering in terms of the positive lotus shelf-life is extended of above-mentioned positive lotus
With.
Further, the positive lotus shelf-life can extend to 45~70 days.
Chitosan (chitosan) belongs to natural products, is the catabolite of chitin deacetylation, by Glucosamine and
The polysaccharide large biological molecule that a small amount of N- acetyl group glucose is got up by β -1,4- glucosides key connections.Chitosan solution is sprayed at
Fruit and vegetable surfaces form polymer semi-permeable membrane, which has permselectivity, water preventing ability, to CO2, C2H4And O2Selective infiltration
Effect.On the one hand extraneous air is prevented to enter in film, on the other hand makes CO inside fruits and vegetables2Content increases, O2Content reduces, suppression
Respiratory metabolism intensity has been made, and has had antibacterial, bactericidal effect to many microorganisms.So as to significantly inhibit fruits and vegetables respiration, transpiration
The physiological and biochemical procedures such as effect, moisture evaporation, metabolism and the conversion of fruit color, postpone physiological aging, extend storage period, play guarantor
Fresh effect.
1- methyl cyclopropenes (1-methylcyclopropene, 1-MCP) are a kind of double bond containing cyclic hydrocarbons,
Exist at normal temperatures with gaseous state, colorless and odorless, boiling point is about 12 DEG C, in a liquid state less stable.1- methyl ring third
Alkene (1-MCP) be it has recently found that a kind of ethylene receptor inhibitor.It can irreversibly act on ethylene receptor, so as to block with
The normal combination of ethylene, inhibit that it is induced with a series of relevant biochemical reactions of fruits and vegetables, cut-flower after-ripening or aging.With
STS, 2,5- the norbornadienes ethylene inhibitor traditional with AVG etc. are compared, and 1-MCP has many advantages, such as nontoxic, low amounts, efficient.
The invention has the advantages that：
1) positive lotus is immersed in chitosan solution by the present invention first, uniform envelope is formed on its surface, so as to reach
The purpose of sterilization fresh-keeping processing is carried out to positive lotus, is then fumigated with 1-MCP, ethylene generation can be reduced, slowed down aging, first
Two kinds of fresh-keeping means of positive lotus, mutual seats are acted on afterwards, and collective effect plays the effect of synergy, can not only effectively prolong
The shelf-life of long sun lotus, while retain positive lotus intrinsic flavor and nutritive value, achieve the effect that fresh-keeping.
2) there are an optimum concentration dividing value, concentration crosses low-permeable increasing for influence of the chitosan solution processing to positive lotus,
Excessive concentration can make the envelope formed on positive lotus surface excessively fine and close, positive lotus adnormal respiration be made to accelerate and rot, by repeatedly trying
The concentration for obtaining chitosan solution is tested in 0.5~1.2% grams per milliliter, treatment effect is preferable.
3) present invention uses glacial acetic acid that chitosan is configured to pH for 3.5~4.2 acid solution, under acid system,
The positive lotus red pigment that positive lotus contains more is stablized so that positive lotus lovely luster is as before.
4) the method for the present invention is simple, and operability is strong, can in production large-scale use, have a good application prospect.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1
A kind of preservation method of sun lotus, includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 0.5% grams per milliliter, impregnates 8 minutes, pull out, dry, dry in the air
Dry temperature is 15 DEG C, and flash-off time is 1.5 hours；
3) the positive lotus dried is placed in the crisper of a concentration of 0.5 microlitre/liter of 1- methyl cyclopropenes (1-MCP) and fumigates 15
Hour, after fumigating, positive lotus is taken out, positive lotus is fitted into freshness protection package, be placed in 6 DEG C, relative humidity is 80~90% condition
Lower storage.
Wherein, chitosan solution preparation method is：0.5 gram of chitosan is weighed, is dissolved in 100mL distilled water,
And stir evenly, obtain the chitosan solution of a concentration of 0.5% grams per milliliter.
After storage 48 days, positive lotus bamboo shoot notch brown stain starts to decay, and positive lotus bud has mildew, there is peculiar smell.
Embodiment 2
A kind of preservation method of sun lotus, includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 0.7% grams per milliliter, impregnates 6 minutes, pull out, dry, dry in the air
Dry temperature is 15 DEG C, and flash-off time is 1.5 hours；
3) the positive lotus dried is placed in the crisper of a concentration of 0.8 microlitre/liter of 1- methyl cyclopropenes (1-MCP) and fumigates 12
Hour, after fumigating, positive lotus is taken out, positive lotus is fitted into freshness protection package, be placed in 4 DEG C, relative humidity is 80~90% condition
Lower storage.
Wherein, chitosan solution preparation method is：0.7 gram of chitosan is weighed, it is 3.5 to be dissolved in 100mL pH
It in glacial acetic acid solution, and stirs evenly, obtains the chitosan solution of a concentration of 0.7% grams per milliliter.
After storage 59 days, the positive slight brown stain of lotus bamboo shoot notch has a small amount of mildew, and positive lotus bud is in dead color, slightly peculiar smell.
Embodiment 3
A kind of preservation method of sun lotus, includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 0.9% grams per milliliter, impregnates 6 minutes, pull out, dry, dry in the air
Dry temperature is 16 DEG C, and flash-off time is 1 hour；
3) the positive lotus dried is placed in the crisper of a concentration of 1 microlitre/liter of 1- methyl cyclopropenes (1-MCP) fumigate it is 10 small
When, after fumigating, positive lotus is taken out, positive lotus is fitted into freshness protection package, be placed in 4 DEG C, under conditions of relative humidity is 80~90%
Storage.
Wherein, chitosan solution preparation method is：0.9 gram of chitosan is weighed, it is 3.8 to be dissolved in 100mL pH
It in glacial acetic acid solution, and stirs evenly, obtains the chitosan solution of a concentration of 0.9% grams per milliliter.
After storage 68 days, the positive slight brown stain of lotus bamboo shoot notch has a small amount of mildew, and positive lotus bud is in dead color, slightly peculiar smell.
Embodiment 4
A kind of preservation method of sun lotus, includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 1.1% grams per milliliter, impregnates 4 minutes, pull out, dry, dry in the air
Dry temperature is 18 DEG C, and flash-off time is 1 hour；
3) the positive lotus dried is placed in the crisper of a concentration of 1.2 microlitre/liter of 1- methyl cyclopropenes (1-MCP) and fumigates 8
Hour, after fumigating, positive lotus is taken out, positive lotus is fitted into freshness protection package, be placed in 2 DEG C, relative humidity is 80~90% condition
Lower storage.
Wherein, chitosan solution preparation method is：1.1 grams of chitosan is weighed, is dissolved in the ice that 100mL pH are 4
It in acetum, and stirs evenly, obtains the chitosan solution of a concentration of 1.1% grams per milliliter.
After storage 60 days, positive lotus bamboo shoot notch brown stain has a small amount of mildew, slightly positive lotus bud dull, peculiar smell.
Embodiment 5
A kind of preservation method of sun lotus, includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 1.2% grams per milliliter, impregnates 1 minute, pull out, dry, dry in the air
Dry temperature is 18 DEG C, and flash-off time is 1 hour；
3) the positive lotus dried is placed in the crisper of a concentration of 1.5 microlitre/liter of 1- methyl cyclopropenes (1-MCP) and fumigates 6
Hour, after fumigating, positive lotus is taken out, positive lotus is fitted into freshness protection package, be placed in 5 DEG C, relative humidity is 80~90% condition
Lower storage.
Wherein, chitosan solution preparation method is：1.2 grams of chitosan is weighed, it is 4.2 to be dissolved in 100mL pH
It in glacial acetic acid solution, and stirs evenly, obtains the chitosan solution of a concentration of 1.2% grams per milliliter.
After storage 53 days, positive lotus bamboo shoot notch brown stain starts to decay, and positive lotus bud has a small amount of mildew, there is peculiar smell.
Embodiment 6
A kind of preservation method of sun lotus, includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 1.1% grams per milliliter, impregnates 4 minutes, pull out, dry, dry in the air
Dry temperature is 18 DEG C, and flash-off time is 1 hour；
3) the positive lotus dried is placed in the crisper of a concentration of 1 microlitre/liter of 1- methyl cyclopropenes (1-MCP), sealing storage
It hides.
Wherein, chitosan solution preparation method is：1.1 grams of chitosan is weighed, is dissolved in the ice that 100mL pH are 4
It in acetum, and stirs evenly, obtains the chitosan solution of a concentration of 1.1% grams per milliliter.
After storage 62 days, positive lotus bamboo shoot notch brown stain has a small amount of mildew, slightly positive lotus bud dull, peculiar smell.
Comparative example 1
A kind of preservation method of sun lotus, includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 0.5% grams per milliliter, impregnates 8 minutes, pull out, dry, dry in the air
Dry temperature is 15 DEG C, and flash-off time is 1.5 hours；
Wherein, chitosan solution preparation method is：0.5 gram of chitosan is weighed, is dissolved in 100mL distilled water,
And stir evenly, obtain the chitosan solution of a concentration of 0.5% grams per milliliter.
After storage 21 days, positive lotus bamboo shoot cut out portion mildew starts to decay, and positive lotus bud is mouldy serious, there is peculiar smell.
Comparative example 2
A kind of preservation method of sun lotus, includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) the positive lotus dried is placed in the crisper of a concentration of 0.5 microlitre/liter of 1- methyl cyclopropenes (1-MCP) and fumigates 15
Hour, after fumigating, positive lotus is taken out, positive lotus is fitted into freshness protection package, be placed in 6 DEG C, relative humidity is 80~90% condition
Lower storage.
After storage 16 days, positive lotus bamboo shoot notch festers, and has mildew, and positive lotus bud grows a large amount of mildews, there is peculiar smell.
Comparative example 3
The preservation method of the positive lotus of this comparative example is substantially the same manner as Example 3, the difference lies in：
In step 2), positive lotus is immersed in a concentration of 0.4% grams per milliliter, pH is in 3.5 chitosan solution.
After storage 23 days, positive lotus bamboo shoot notch brown stain starts to decay, and positive lotus bud is mouldy serious, there is peculiar smell.
Comparative example 4
The preservation method of the positive lotus of this comparative example is substantially the same manner as Example 3, the difference lies in：
In step 2), positive lotus is immersed in a concentration of 1.3% grams per milliliter, pH is in 3.5 chitosan solution.
After storage 15 days, positive lotus bamboo shoot notch brown stain starts to decay, and positive lotus bud is mouldy serious, there is peculiar smell.
Comparative example 5
The preservation method of the positive lotus of this comparative example is substantially the same manner as Example 2, the difference lies in：
In step 2), positive lotus is immersed in a concentration of 0.7% grams per milliliter, pH is in 3 chitosan solution.
Compared to embodiment 2, the positive lotus of this comparative example has heavier tart flavour, and discoloration, color and luster occurs ahead of time in positive lotus bud
The phenomenon that dim.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this is obvious for art processes personnel.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention belong to the scope of protection of present invention.
Claims (8)
1. a kind of preservation method of sun lotus, which is characterized in that the preservation method of the sun lotus includes the following steps：
1) timely picking, fresh no disease and pests harm, the positive lotus having no mechanical damage are selected；
2) positive lotus is immersed in the chitosan solution of a concentration of 0.5~1.2% grams per milliliter, impregnates 1~8 minute, pull out, dry in the air
It is dry；
3) the positive lotus dried is placed in the space of a concentration of 0.5~1.5 microlitre/liter of 1- methyl cyclopropenes and fumigated 6~15 hours,
Positive lotus cryopreservation after stifling.
2. the preservation method of sun lotus according to claim 1, which is characterized in that step 3) replaces with：
3 ') the positive lotus dried is placed in freshness protection package/crisper of a concentration of 0.5~1 microlitre/liter of 1- methyl cyclopropenes, sealed
Storage.
3. it is according to claim 1 sun lotus preservation method, which is characterized in that in step 2), it is described dry dry temperature
It is 15~18 DEG C to spend, and flash-off time is 1~1.5 hour.
4. the preservation method of sun lotus according to claim 1, which is characterized in that, will before fumigate in step 3)
The positive lotus dried carries out layering and divides processing.
5. the preservation method of sun lotus according to claim 1, which is characterized in that in step 3), after fumigating, by positive lotus
It is fitted into freshness protection package, is then 2~6 DEG C in refrigerated storage temperature, relative humidity is stored under conditions of being 80~90%.
6. the preservation method of sun lotus according to claim 1, which is characterized in that the chitosan solution preparation method is：
0.5~1.2 gram of chitosan is weighed, is dissolved in the glacial acetic acid solution that 100 milliliters of pH are 3.5~4.2, and is stirred equal
It is even, obtain the chitosan solution of a concentration of 0.5~1.2% grams per milliliter.
7. a kind of application of preservation method of positive lotus described in claim 1 in terms of the positive lotus shelf-life is extended.
8. application according to claim 7, which is characterized in that the positive lotus shelf-life can extend to 45~70 days.
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Application publication date: 20180710 |