CN109362876A - A kind of dragon fruit Chinese medicine composite coating preservative and its preparation method and application - Google Patents
A kind of dragon fruit Chinese medicine composite coating preservative and its preparation method and application Download PDFInfo
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- CN109362876A CN109362876A CN201810980433.6A CN201810980433A CN109362876A CN 109362876 A CN109362876 A CN 109362876A CN 201810980433 A CN201810980433 A CN 201810980433A CN 109362876 A CN109362876 A CN 109362876A
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- dragon fruit
- chinese medicine
- fruit
- antistaling agent
- composite coating
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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
- A23B7/16—Coating with a protective layer; 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
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth 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)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The present invention relates to fresh fruit green antiseptic preservation technology fields, and in particular to a kind of Chinese medicine composite coating preservative of dragon fruit and its preparation method and application.Antistaling agent of the present invention is mixed in proportion by Chinese medical extract and auxiliary material, wherein, Chinese medical extract is that Golden Larch Bark, the tuber of stemona and frutus cnidii are prepared according to weight percent 2:1:1 through ethyl alcohol extraction, and auxiliary material includes konjaku glucomannan, ascorbic acid, phytic acid and glycerol.Healthy fruit reaches 71.2% when antistaling agent of the invention can make dragon fruit healthy fruit reached 83.8%, room temperature storage 20 days at cryopreservation 24 days, can effectively inhibit dragon fruit to rot and dehydration, keep fruit organoleptic quality.And raw materials used is green natural raw material, safe and non-toxic.
Description
Technical field
The present invention relates to fresh fruit green antiseptic preservation technology fields, and in particular to a kind of compound painting of the Chinese medicine of dragon fruit
Film antistaling agent and its preparation method and application.
Background technique
Dragon fruit is Cactaceae (Cactaceae) hylocereus category (Hylocereus), belongs to typical tropical plants.Flue
Fruits are rich in vitamin, betanin, water-soluble dietary fiber etc., have reducing blood lipid, antitumor, beauty treatment weight-reducing, it is anti-oxidant and
It is anti-aging and other effects, thus liked that there is very vast market prospect by the majority of consumers deeply.But dragon fruit is normal after adopting
Warm storage easily dehydration shrinkage, it is easier to it is infected by latent germ, causes to rot, majority at source can only nearby be sold,
It is inconvenient outwards to transport and sell.Wherein, the raw sickle-like bacteria of layer (F.proliferatum) and tack anthrax-bacilus
It (C.fructicola) is the main pathogenic fungi for causing to adopt rear dragon fruit fruit rot, their infectivities are strong, harm is big, serious shadow
Fruit quality and commodity value are rung, heavy economic losses is caused.Therefore, effective dragon fruit preservation technology is researched and developed, is delayed
Its ageing process keeps storage quality, prolongs storage period, and adopts rear logistics loss to reduction, increases economic benefit with important
Meaning.
Currently, adopting rear dragon fruit fruit storage relies primarily on preservation by low temperature and chemical preservation.Low temperature environment can be effectively suppressed
Microbial activities is reduced and is rotted, and still, dragon fruit is more sensitive to low temperature, and too low can lead to of reserve temperature damages to plants caused by sudden drop in temperature generation, not only
The appearance and quality of fruit are influenced, and after the fruit damaged to plants caused by sudden drop in temperature moves on to room temperature from low temperature, because of own physiological disorder, leads to fruit
It is real to rot faster.In addition, the excessive use of chemical preservative has resulted in many problems, such as food safety hazards, pathogen
Drug resistance and the destruction of ecological environment etc..As people are food-safe and the pay attention to day by day of environmental protection, natural, economic, peace
The development and application of full anti-rot and fresh-keeping method has caused the extensive concern of people.
In recent years, research finds that some Chinese herbal medicines have good antibacterial effect, and toxic side effect is small, wide by people
It is general to be applied to pharmaceuticals industry.Since Chinese herbal medicine is harmless to the human body, no pollution to the environment, and there is, processing low using concentration
The advantages that method is easy is the very promising developing direction of postharvest technology of fruits and vegetables.China has natural vegetable Chinese herbal medicine abundant
Resource provides good basis to develop safe and effective crude antistaling agent.The present invention is directed to clearly several Chinese herbal medicines to extract
Object adopts the inhibiting effect of rear rot-causing fungi to dragon fruit, provides foundation for the further research and development of natural antiseptic agent.
Summary of the invention
In view of shortcoming and defect existing for existing dragon fruit postharvest disease control method, the present invention is killed Chinese medical extract
Bacterium property, the film forming of konjaku glucomannan, ascorbic acid and phytic acid inoxidizability and glycerol combine prepare it is a kind of multiple
Coating antistaling agent is closed, can effectively inhibit the main pathogenic fungi sickle-like bacteria and the anthrax-bacilus that cause dragon fruit postharvest decay, reduce
Rotting rate, percentage of water loss extend shelf life.
Goal of the invention to realize the present invention, an object of the present invention are to provide a kind of dragon fruit Chinese medicine compelx coating guarantor
Fresh dose, which is mixed in proportion by Chinese medical extract and auxiliary material, which is characterized in that the Chinese medical extract is
Using Golden Larch Bark, the tuber of stemona and frutus cnidii as mixed extract made from raw material, the auxiliary material includes konjaku glucomannan, Vitamin C
Acid, phytic acid and glycerol.
In some preferred embodiments, the Chinese medical extract is by Golden Larch Bark, the tuber of stemona and frutus cnidii according to weight percent
2:1:1 is prepared through ethyl alcohol extraction.
In some preferred embodiments, the auxiliary material is composed of the following parts by weight: konjaku glucomannan 0.5~
1.5 parts, 0.5~2.0 part of ascorbic acid, 0.1~0.2 part of phytic acid, 1~2 part of glycerol.
In some preferred embodiments, the parts by weight of the Chinese medical extract in the antistaling agent are 10~40 parts.
The preparation method of the dragon fruit Chinese medicine composite coating preservative follows the steps below:
(1) it the preparation of Chinese medical extract: is crushed to after Golden Larch Bark, the tuber of stemona, three taste Chinese medicine of frutus cnidii are mixed in proportion super
Fine powder；50~60% ethanol solution is added according to solid-liquid ratio 1:10, the extraction of room temperature ultrasound, filtering, filtrate is freeze-dried to be obtained
To Chinese medical extract；
(2) preparation of antistaling agent: konjaku glucomannan is dissolved to obtain the hydrosol, according to parts by weight by traditional Chinese medicine extraction
Object, ascorbic acid, phytic acid, glycerol be added the hydrosol in, be uniformly mixed to get.
On the other hand, the present invention provides the method for the processing dragon fruit of antistaling agent described in one kind, through this process method, can
Effectively to lower dragon fruit fruit rotting rate, extends storage period, significantly improve dragon fruit quality.
In some preferred embodiments, using the method for antistaling agent processing dragon fruit are as follows: by Chinese medical extract and auxiliary material
Be mixed and made into antistaling agent in proportion, impregnate fresh dragon fruit, when immersion a length of 1~5min, taking-up air-dry to dragon fruit surface without
It is water stain, it can be packed or be stored.
In addition, there is Chinese medicine composition of the present invention preparation to inhibit the raw sickle-like bacteria of layer or tack anthrax on dragon fruit
The purposes of the reagent of bacterium, preferably, the Chinese medicine composition is by Golden Larch Bark, the tuber of stemona and frutus cnidii according to weight percent 2:1:1
It is prepared through ethyl alcohol extraction.
The beneficial effects of the invention are as follows:
(1) present invention carries out bacteriostatic test for the pathogen for causing dragon fruit morbidity rotten, is screened according to bacteriostatic test
The natural materials for providing anti-corrosive antibacterial function carry out organic assembling with auxiliary materials such as konjaku glucomannans.What the present invention developed
Antistaling agent compatibility is reasonable, and above-mentioned compatibility and preparation method make to cooperate between each component of antistaling agent of the invention, Jin Erji
Play to big degree each component effective component and its between synergistic function, obtained antistaling agent not only fresh-keeping effect
It is good, and raw materials used is green natural raw material, it is safe and non-toxic.Antistaling agent of the invention can make dragon fruit in cryopreservation
Healthy fruit reaches 71.2% when healthy fruit reaches 83.8%, room temperature storage 20 days at 24 days.And by being formed in fruit surface
Film prevents the physiological aging of dragon fruit, and keeps pericarp good colour.
(2) antistaling agent obtained by the present invention is easy to use, puts into without large scale equipment, and production cost is low, has preferable
Application prospect and economic benefit.
The raw material of antistaling agent of the present invention has the function of as described below:
1, Golden Larch Bark, the tuber of stemona, frutus cnidii
Golden Larch Bark, the tuber of stemona, frutus cnidii have certain bacteriostasis, can play inhibiting effect to a variety of fungies, bacterium, and
And the tuber of stemona also has the function of reducing breathing.Under normal circumstances, Golden Larch Bark, the tuber of stemona, frutus cnidii three's compatibility are commonly used to preparation use
In the medicament for the treatment of skin disease etc., present invention discover that Golden Larch Bark, the tuber of stemona, frutus cnidii are to the main disease for causing dragon fruit putrid and deteriorated
The raw sickle-like bacteria of opportunistic pathogen layer and tack anthrax-bacilus have stronger inhibiting effect, and three's compatibility can significantly alleviate dragon fruit and rot,
Show collaboration fresh-keeping effect.
2, konjaku glucomannan
Konjaku glucomannan has good water-retaining property, gelation and film forming, can form thin film in fruit surface,
To O2、CO2Deng have certain selected area update strategy effect, can prevent moisture from evaporating, reduce respiratory intensity of fruit, reduction nutriment
Loss, and have the function of inhibiting germ and mould.The present invention by by Chinese medical extract in conjunction with konjaku glucomannan,
So that prepared antistaling agent can show to form semitransparent thin film in dragon fruit, acted on by selectively being penetrated to gas,
The carbon dioxide in dragon fruit, ethylene can be made to exclude, and a small amount of oxygen is allowed to enter in fruit, the physiology for reducing dragon fruit declines
Always.
3, ascorbic acid and phytic acid
Ascorbic acid is a kind of antioxidant, has and alleviates tissue aging, mitigates cell membrane damage and protection fruit colour
Effect.Phytic acid is to be present in one of vegetable seeds organic acid, and the physiological action that not only fruit can be maintained faint reaches
Ideal permeable, permeability, and fruits and vegetables antioxygenic property can be significantly improved, it is effectively prevent brown stain, improves fruit gloss.
4, glycerol
Glycerol is rich in hydroxyl, can form hydrogen bond with hydrone, improve the moisture pick-up properties of film, reduce the brittleness of film, assign
Film is preferably flexible.Dragon fruit fruit body is larger, is easy to cause film forming layer to fall off in friction or collision, and addition glycerol can effectively change
The film forming characteristics of kind konjaku glucomannan.
Detailed description of the invention
Fig. 1 be in the embodiment of the present invention 2 three kinds of Chinese medical extracts to inoculation pathogenic bacteria dragon fruit cryopreservation during
The influence of rotting rate.Wherein, (A) figure indicates the dragon fruit fruit rotting rate of the raw sickle-like bacteria of seed layer, and (B) figure indicates inoculation tack
The dragon fruit fruit rotting rate of anthrax-bacilus.
Fig. 2 is influence of three kinds of Chinese medical extracts to rotting rate during dragon fruit cryopreservation in the embodiment of the present invention 3
Fig. 3 is that the Chinese medicine composite coating preservative that different quality matches in the embodiment of the present invention 5 is store to dragon fruit low temperature
The fresh-keeping effect of hiding.Wherein, (A) figure indicates that, using the influence after antistaling agent to dragon fruit rotting rate, (B) figure is indicated using fresh-keeping
To the influence of dragon fruit weight-loss ratio after agent, (C) figure is indicated using the influence after antistaling agent to dragon fruit hardness.
Specific embodiment
Below with reference to embodiment, the content of the present invention will be explained in more detail.It should be appreciated that implementation of the invention is not limited to
In the following examples, the accommodation in any form and/or change made to the present invention fall within the scope of the present invention.
In the present invention, if not refering in particular to, all parts, percentage are unit of weight, and all equipment and raw material etc. are equal
It is commercially available or the industry is common.If the method that embodiment uses is technology generally in the art without specializing.
Embodiment 1: the inhibiting effect of Golden Larch Bark, the tuber of stemona and common cnidium fruit P.E to dragon fruit postharvest pathogen
(1) take high-quality dry Golden Larch Bark, the tuber of stemona and frutus cnidii crush 300 mesh superfine powder, according to solid-liquid ratio 1:10 (W/
V the ethanol solution of 60% (V/V)) is added, room temperature ultrasound (power 300W) extracts 1~3 time, 2~3h of each ultrasound, mistake after extraction
Filter, merging filtrate are simultaneously freeze-dried, and it is spare to respectively obtain Cortex Pseudolaricis extract, Radix Stemonae extract and common cnidium fruit P.E powder.
(2) Golden Larch Bark, the tuber of stemona and common cnidium fruit P.E test the inhibition of dragon fruit postharvest pathogen
For trying strain: the raw sickle-like bacteria of layer and tack anthrax-bacilus are this laboratory preservation strain, are isolated from red meat dragon fruit.
Fungistatic effect experiment: Cortex Pseudolaricis extract, Radix Stemonae extract and common cnidium fruit P.E are dissolved in distilled water respectively,
And it is fully emulsified that 10% Tween-20 is added.PDA culture medium to be melted is cooled to 50 DEG C or so, is separately added into the native chaste tree of 200 μ L
Skin extracting solution, tuber of stemona extracting solution and frutus cnidii extracting solution, sufficiently inverted plate after oscillation mixing.It is spat with only adding same amount of 10%
The culture medium flat plate of temperature -20 is control.Being beaten on the pathogen plate of culture 7d with aseptic card punch and taking diameter is that 6mm fungus block is put
In PDA plate (diameter 90mm) center.It is placed in 28 DEG C of biochemical cultivation cases and cultivates 6d, observe fungistatic effect.Using right-angled intersection
Method measurement colony diameter simultaneously calculates inhibiting rate.3 plates of each concentration gradient, test are repeated 3 times.Inhibiting rate calculation formula are as follows:
Inhibiting rate (%)=(control group colony diameter-processing group colony diameter)/(control group colony diameter) × 100.
Inhibitory effect of the 1 three kinds of Chinese medical extracts of table to dragon fruit Main postharvest pathogens
The above results show that Cortex Pseudolaricis extract, Radix Stemonae extract and common cnidium fruit P.E are to the raw sickle-like bacteria of layer and tack
Anthrax-bacilus all has stronger inhibitory effect, and wherein the fungistatic effect of Golden Larch Bark and the tuber of stemona is significantly higher than frutus cnidii.
Embodiment 2: the living body bacteriostasis of Golden Larch Bark, the tuber of stemona and common cnidium fruit P.E
(1) three kinds of Chinese medical extracts described in Example 1, are dissolved in distilled water respectively, and 10% Tween-20 is added and increases
It is molten, respectively obtain Golden Larch Bark extracting solution, tuber of stemona extracting solution and frutus cnidii extracting solution.
(2) it in order to further study the living body fungistatic effect of three kinds of Chinese medicine extracts, is detected using the method for artificial infection
Effect of three kinds of Chinese medical extracts to flue fruits pathogenic bacteria.The raw sickle-like bacteria of layer and tack anthrax-bacilus is living with PDA culture medium
It is spare that bacteria suspension is made with sterile water in picking mycelia after change.The dragon fruit for picking 7~8 maturity, it is uniform, disease-free to select fruit shape
Insect pest, the fruit without machinery wound are cleaned with clear water, carry out surface sterilization with 50% alcohol, after drying, extracted respectively with Golden Larch Bark
Liquid, tuber of stemona extracting solution and frutus cnidii extracting solution impregnate 5~10min, with clear water immersion group as control.After taking-up is dried, respectively
Spray prepared sickle-like bacteria and anthrax spores suspension (spore concentration 105CFU/mL).After artificial infection pathogenic bacteria
Dragon fruit is placed in 7 DEG C of storages, observes dragon fruit Decay every 4d, and calculate rotting rate.
(3) after result using Golden Larch Bark extracting solution, tuber of stemona extracting solution and frutus cnidii extracting solution as shown in Figure 1, handled, significantly
Reduce rotting rate of the dragon fruit of the raw sickle-like bacteria of seed layer or tack anthrax-bacilus in storage.It is inoculated with the flue of sickle-like bacteria
For fruits when storage is to 24d, control group rotting rate is 72.1%, and frutus cnidii extracting solution processing group is 32.1%, and the tuber of stemona mentions
Taking object extracting solution is 21.7%, and Golden Larch Bark extracting solution processing group is only 12.6%.The flue fruits of inoculation anthrax-bacilus are being store
When hiding is to 20d, control group rotting rate is 64.3%, and frutus cnidii extracting solution processing group is 35.1%, tuber of stemona extracting solution processing group
It is 24.8%, and Golden Larch Bark extracting solution processing group is only 16.7%.
Embodiment 3: the fresh-keeping effect of Golden Larch Bark, the tuber of stemona and common cnidium fruit P.E in dragon fruit cryopreservation
(1) three kinds of Chinese medical extracts described in Example 1, are dissolved in distilled water respectively, and 10% Tween-20 is added and increases
It is molten, respectively obtain Golden Larch Bark extracting solution, tuber of stemona extracting solution and frutus cnidii extracting solution.
(2) according to weight percent 2:1:1,300 mesh are crushed to obtain after Golden Larch Bark, the tuber of stemona, three taste Chinese medicine of frutus cnidii are mixed
Superfine powder.The ethanol solution of 50~60% (V/V), room temperature ultrasound (power 300W) extraction 1 are added according to solid-liquid ratio 1:10 (W/V)
~3 times, 2~3h of each ultrasound is filtered, merging filtrate is freeze-dried to obtain mixing Chinese medicinal extracts after extraction；It is dissolved in
In distilled water, and 10% Tween-20 solubilising is added, obtains mixing Chinese medicine extract.
(3) pick 7~8 maturity dragon fruit, select fruit shape uniformly, no disease and pests harm, the fruit without machinery wound.Use clear water
After cleaning, drying, Golden Larch Bark, the tuber of stemona, frutus cnidii and mixing Chinese medicine extract are sprayed respectively and is placed in 7 DEG C of storages after taking-up is dried
Hiding.Routine observation dragon fruit Decay, calculates its rotting rate.
(4) result using Golden Larch Bark extracting solution, tuber of stemona extracting solution, frutus cnidii extracting solution and mixing Chinese medicine as shown in Fig. 2, mentioned
After taking liquid to handle, the rotting rate during dragon fruit cryopreservation is reduced.After storing 24d, the rotting rate for compareing fruit reaches
To 42.1%, frutus cnidii extracting solution processing group is 28.6%, and tuber of stemona extracting solution processing group is 22.5%, the processing of Golden Larch Bark extracting solution
Group is 15.6%, and mixed extract processing group is only 10.5%.As can be seen that three kinds of Chinese medical extracts can reduce flue
Rotting rate of the fruit in cryopreservation, extends the shelf life, and three's compatibility has and preferably prevents effect of rotting, and illustrating can between three
There can be synergistic effect.
Embodiment 4: a kind of preparation and application of dragon fruit Chinese medicine composite preservative
(1) according to weight percent 2:1:1,300 mesh are crushed to obtain after Golden Larch Bark, the tuber of stemona, three taste Chinese medicine of frutus cnidii are mixed
Superfine powder.The ethanol solution of 50~60% (V/V), room temperature ultrasound (power 300W) extraction 1 are added according to solid-liquid ratio 1:10 (W/V)
~3 times, 2~3h of each ultrasound is filtered, the freeze-dried mixed-powder for obtaining Chinese medical extract of merging filtrate is standby after extraction
With.
(2) prepared by composite coating preservative: the antistaling agent raw material of different weight number is weighed by formula, by konjak portuguese gansu polyose
Sugar is added in distilled water, and 60 DEG C of heating water baths stir 2~3h and obtain the hydrosol, and Chinese medical extract, ascorbic acid, phytic acid are added
In the hydrosol, and glycerol is added as film coalescing aid, stirs 20~30min, be uniformly dissolved each component, finally plus water constant volume,
Obtain Chinese medicine composite coating preservative.Antistaling agent parts by weight proportion is as follows:
A:0.5 parts of konjaku glucomannans of antistaling agent, 0.5 part of ascorbic acid, 0.1 part of phytic acid, 1 part of glycerol, water add to 100.
B:10 parts of Chinese herbal medicine extracts of antistaling agent, 0.5 part of konjaku glucomannan, 0.5 part of ascorbic acid, 0.1 part of phytic acid, 1
Part glycerol, water add to 100.
C:20 parts of Chinese herbal medicine extracts of antistaling agent, 1.5 parts of konjaku glucomannans, 2.0 parts of ascorbic acid, 0.2 part of phytic acid, 2
Part glycerol, water add to 100.
D:30 parts of Chinese herbal medicine extracts of antistaling agent, 1.5 parts of konjaku glucomannans, 2.0 parts of ascorbic acid, 0.2 part of phytic acid, 2
Part glycerol, water add to 100.
E:40 parts of Chinese herbal medicine extracts of antistaling agent, 1.0 parts of konjaku glucomannans, 1.5 parts of ascorbic acid, 0.1 part of phytic acid,
1.5 parts of glycerol, water add to 100.
Embodiment 5: the fresh-keeping effect of Chinese medicine composite preservative when cryopreservation
(1) processing method: select maturity is consistent, fruit shape uniformly, no disease and pests harm, the flue fruits without machinery wound, will
It is randomly divided into 6 groups.Flue fruits are respectively put into the fresh-keeping liquid of different quality proportion prepared by embodiment 4, immersion 1~
It pulls drying after 5min out, is control with without any processing group.Treated, and fruit is placed at 7 DEG C stores, and observation fruit is rotten
Rotten rate, and measure its weight-loss ratio and hardness.Weight-loss ratio (%)=(m1-m2))/m1× 100, in formula: m1For the matter of fresh dragon fruit
It measures (g)；m2For the quality (g) of dragon fruit after storage n d.
(2) as shown in Figure 3A, when storing 12d and 24d, antistaling agent B, antistaling agent C, antistaling agent D and antistaling agent E processing group fire
Imperial fruit rotting rate is substantially less than and compares, and wherein antistaling agent A inhibits rotten effect without apparent, but mentions with a certain amount of Chinese medicine
Composite preservative after taking object compatibility shows apparent Perishing prevention effect, this illustrates Chinese medicine compelx coating provided by the invention
Antistaling agent can significantly reduce disease of the dragon fruit in storage and occur, and reduce dragon fruit and rot, and with Chinese medical extract
Concentration is positively correlated, and the effect of antistaling agent E is best.When storing 24d, control group rotting rate is about 33.4%, and antistaling agent E is handled
Group rotting rate is about 16.2%.As shown in Figure 3B, each group weight-loss ratio all rises with the increase of storage number of days, but at antistaling agent
The ascendant trend of reason group weight-loss ratio is all obviously delayed in control group, this is because the barrier that antistaling agent film is formed reduces moisture
Evaporation.As shown in Figure 3 C, in storage period, the hardness of each group dragon fruit is all reduced with the increase of storage number of days, is being stored
Early period, each group did not find out significant difference directly, but after storing 18d, the hardness of each antistaling agent processing group is obviously higher than control
Group illustrates that Chinese medicine composite coating preservative can slow down dragon fruit in the softening of anaphase storage, but the difference between concentration is simultaneously
It is unobvious.
Embodiment 6: the fresh-keeping effect of Chinese medicine composite preservative when room temperature storage
(1) processing method: select maturity is consistent, fruit shape uniformly, no disease and pests harm, the flue fruits without machinery wound, will
It is randomly divided into 6 groups.Flue fruits are respectively put into the fresh-keeping liquid of different quality proportion prepared by embodiment 4, immersion 1~
It pulls drying after 5min out, is control with without any processing group.Treated, and fruit places storage (25 DEG C of temperature) at normal temperature,
Fruit rotting rate is observed, and measures its weight-loss ratio and hardness.
(2) generally, dragon fruit normal-temperature shelf life is very short, stores 5~7 days, and dehydration wilting, browning phenomenon occurs in scale, storage
7 days or more the scale base portions in hiding and areola start to decay.Experimental result similar trend when showing with cryopreservation, antistaling agent B,
Antistaling agent C, antistaling agent D and antistaling agent E processing group can be substantially reduced dragon fruit storage rot incidence, slow down dragon fruit and storing
Hide the dehydration and softening in later period.When storing 20d, control group rotting rate is about 83.5%, and antistaling agent E processing group rotting rate is about
28.8%.
For the fresh-keeping effect for further comparing antistaling agent of the present invention, water is commonly used with antistaling agent E and on the market respectively
(commercially available) the processing dragon fruit of fresh-keeping agent of fruits observes the organoleptic quality of 20 days dragon fruits of room temperature storage, and preservation method is referring to this
The invention method, wherein processing group is to use antistaling agent of the present invention, and contrast groups 1 are using commercially available fresh-keeping
Agent, contrast groups 2 are not take Preservation Treatment, and concrete condition see the table below:
2 dragon fruit Preservation Treatment organoleptic quality situation table of table
In conclusion Chinese medicine composite coating preservative of the present invention has good fresh-keeping effect, fire can be substantially reduced
Rotting rate and percentage of water loss during imperial fruit low temperature, room temperature storage keep the preferable organoleptic quality of dragon fruit, wherein antistaling agent E
Fresh-keeping effect it is best.
Above description is the detailed description for the present invention preferably possible embodiments, but embodiment is not limited to this hair
Bright patent claim, it is all the present invention suggested by technical spirit under completed same changes or modifications change, should all belong to
In the covered the scope of the patents of the present invention.
Claims (7)
1. a kind of dragon fruit Chinese medicine composite coating preservative, the antistaling agent be mixed in proportion by Chinese medical extract and auxiliary material and
At, which is characterized in that the Chinese medical extract is the institute using Golden Larch Bark, the tuber of stemona and frutus cnidii as mixed extract made from raw material
Stating auxiliary material includes konjaku glucomannan, ascorbic acid, phytic acid and glycerol.
2. dragon fruit Chinese medicine composite coating preservative according to claim 1, which is characterized in that the Chinese medical extract is
It is prepared according to weight percent 2:1:1 through ethyl alcohol extraction by Golden Larch Bark, the tuber of stemona and frutus cnidii.
3. dragon fruit Chinese medicine composite coating preservative according to claim 1, which is characterized in that the auxiliary material is by following heavy
The group of amount number is grouped as: 0.5 ~ 1.5 part of konjaku glucomannan, 0.5 ~ 2.0 part of ascorbic acid, and 0.1 ~ 0.2 part of phytic acid, glycerol 1 ~
2 parts.
4. dragon fruit Chinese medicine composite coating preservative according to claim 1, which is characterized in that in the antistaling agent
The parts by weight of medicament extract are 10 ~ 40 parts.
5. a kind of preparation method of the dragon fruit Chinese medicine composite coating preservative as described in any one of claim 1-4,
It is characterized in that, includes the following steps:
(1) preparation of Chinese medical extract: superfine powder is crushed to after Golden Larch Bark, the tuber of stemona, three taste Chinese medicine of frutus cnidii are mixed in proportion；
50 ~ 60% ethanol solution is added according to solid-liquid ratio 1:10, the extraction of room temperature ultrasound is filtered, and the freeze-dried Chinese medicine that obtains of filtrate mentions
Take object；
(2) preparation of antistaling agent: konjaku glucomannan being dissolved to obtain the hydrosol, according to parts by weight by Chinese medical extract, anti-
Bad hematic acid, phytic acid, glycerol be added the hydrosol in, be uniformly mixed to get.
6. a kind of side using the fresh-keeping dragon fruit of Chinese medicine composite coating preservative as described in any one of claim 1-4
Method, which is characterized in that Chinese medical extract and auxiliary material are mixed and made into antistaling agent in proportion, impregnate fresh dragon fruit, impregnates duration
For 1 ~ 5 min, taking-up air-dry to dragon fruit surface water stain-free to get.
7. a kind of Chinese medicine composition inhibits the purposes of the reagent of the raw sickle-like bacteria of layer or tack anthrax-bacilus on dragon fruit in preparation,
Be characterized in that, the Chinese medicine composition by Golden Larch Bark, the tuber of stemona and frutus cnidii according to weight percent 2:1:1 through ethyl alcohol extract preparation and
?.
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| CN110651821A (en) * | 2019-10-31 | 2020-01-07 | 华南农业大学 | Pitaya preservative |
| CN114698689A (en) * | 2022-05-12 | 2022-07-05 | 中国热带农业科学院南亚热带作物研究所 | Pitaya flake preservative |
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| CN106332960A (en) * | 2016-08-23 | 2017-01-18 | 陈小洁 | Pawpaw preservative |
| CN106509083A (en) * | 2016-10-11 | 2017-03-22 | 常州市鼎日环保科技有限公司 | Preparation method for fresh-keeping film coating agent for fruits |
| CN107494716A (en) * | 2017-09-29 | 2017-12-22 | 甘肃宝成物流有限公司 | A kind of fresh-keeping method of pawpaw long-distance transport |
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| CN101953395A (en) * | 2009-07-21 | 2011-01-26 | 西北农林科技大学 | Apple coating agent and treatment method thereof |
| CN106332960A (en) * | 2016-08-23 | 2017-01-18 | 陈小洁 | Pawpaw preservative |
| CN106509083A (en) * | 2016-10-11 | 2017-03-22 | 常州市鼎日环保科技有限公司 | Preparation method for fresh-keeping film coating agent for fruits |
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| CN110651821A (en) * | 2019-10-31 | 2020-01-07 | 华南农业大学 | Pitaya preservative |
| CN114698689A (en) * | 2022-05-12 | 2022-07-05 | 中国热带农业科学院南亚热带作物研究所 | Pitaya flake preservative |
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Application publication date: 20190222 |