CN108783371A - A kind of processing method of instant fresh walnut - Google Patents

A kind of processing method of instant fresh walnut Download PDF

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Publication number
CN108783371A
CN108783371A CN201810736188.4A CN201810736188A CN108783371A CN 108783371 A CN108783371 A CN 108783371A CN 201810736188 A CN201810736188 A CN 201810736188A CN 108783371 A CN108783371 A CN 108783371A
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CN
China
Prior art keywords
walnut kernel
fresh
fresh walnut
walnut
instant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810736188.4A
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Chinese (zh)
Inventor
�田�浩
李宏
侯朝祥
易霞
于丽娟
潘俊
王瀚墨
杨宏
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Institute Of Agro-Products Processing Yaas
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Institute Of Agro-Products Processing Yaas
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Priority to CN201810736188.4A priority Critical patent/CN108783371A/en
Publication of CN108783371A publication Critical patent/CN108783371A/en
Pending legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L25/00Food consisting mainly of nutmeat or seeds; Preparation or treatment thereof
    • A23L25/20Food consisting mainly of nutmeat or seeds; Preparation or treatment thereof consisting of whole seeds or seed fragments
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23BPRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B9/00Preservation of edible seeds, e.g. cereals
    • A23B9/005Processes or apparatus using pressure variation or mechanical force, e.g. shock, acceleration, shear stress, contortion
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L5/00Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/30Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00Food compositions, function of food ingredients or processes for food or foodstuffs

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Seeds, Soups, And Other Foods (AREA)

Abstract

The present invention relates to a kind of processing methods of instant fresh walnut, belong to food preservative technology field, the present invention specifically includes following steps:1)Fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;2)Fresh walnut kernel is put into packaging bag, is vacuum-packed, by the pressure treatment 5-10min of super-pressure 100-550MPa, obtains instant fresh walnut kernel product;3)It will treated that instant fresh walnut kernel product is placed under 4-10 DEG C of cryogenic conditions stores;The invention belongs to the physical treatment methods of zero addition, are not necessarily to any additive, and walnut kernel nutriment is lost in few, long shelf-life, while walnut kernel and bitter inner membrance(Skin)Easily peelable, consumer can select gross weight edible or peeling according to personal like, convenient, increase consumer's alternative.

Description

A kind of processing method of instant fresh walnut
Technical field
The invention belongs to food preservative technology fields, specifically, are related to a kind of processing method of instant fresh walnut.
Background technology
Include mainly at the Preservation Treatments such as color protection, anti-corrosion and peeling currently, in fresh walnut processing and its antistaling process Reason.Wherein fresh-keeping to mostly use color stabilizer to protect color, chemical preservative is added, and long bacterium, going mouldy reaches anti-corrosion effect preventing, There is the introducing of chemical substance in the process.Chemical reagent can make thalline generate resistance using frequently, and bactericidal effect can weaken. Meanwhile the product that chemical reagent is generated with material effect in microbial cell will produce harmful effect to human body, be remained in food Chemical reagent also brings along the problem of edible safety.Though there is part to use plant extract agent, the taste of plant itself that can influence The flavor of walnut.
Walnut kernel wraps up inner membrance (skin), has bitter taste, uncomfortable taste of part population, so would generally be to fresh walnut Benevolence carries out peeling processing, and common method includes:1. NaHCO3 solution hot dippings, ice water cold soaking rinse, normal-temperature water rinsing is completed Skin;2. aqueous slkali soaking, high pressure water washing peeling;3. being put into quenching in ice water after steam treatment to handle, then tap water washes Clothing;4. decorticating agent (NaOH and EDTA) is added leads to hot steam again;5. skinning machine hairbrush brushes away skin.
There are more defects for existing barking method, if buck bubble, addition decorticating agent can introduce new chemical substance, to human body Generate negative effect;Contain a large amount of unsaturated fatty acid in walnut kernel, heat drift can cause unsaturated fatty acid in walnut kernel to be sent out Raw oxidation reaction, destroys the nutriment of walnut.Furthermore though with bitter mouthfeel, it has mends the inner membrance (skin) of walnut kernel Gas, promoting blood circulation, adjusting the five internal organs and other effects, not everyone is not all liked and is eaten yet, in the process segment directly by walnut kernel inner membrance (skin) Removal, lacks selectivity for consumers.
Invention content
In order to solve the problems, such as background technology, the present invention provides a kind of processing methods of instant fresh walnut, belong to In the physical treatment method of zero addition, it is not necessarily to any additive, walnut kernel nutriment is lost in few, long shelf-life, while walnut Benevolence and bitter inner membrance (skin) are easily peelable, and consumer can select gross weight edible or peeling according to personal like, convenient, increase Consumer is alternative.
To achieve the above object, the present invention is achieved through the following technical solutions:
The processing method of the instant fresh walnut, specifically includes following steps:
1) fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2) fresh walnut kernel is put into packaging bag, is vacuum-packed, by ultra high pressure treatment, obtain instant fresh walnut kernel production Product;
3) the instant fresh walnut kernel product cryopreservation for obtaining step 2).
Further, in step 2), the pressure of ultra high pressure treatment is 100-550MPa.
Further, the pressure of ultra high pressure treatment is 300-550MPa.
Further, in step 2), the ultra high pressure treatment time is 5-10min.
Further, in step 3), cryopreservation refers to being placed under 4-10 DEG C of cryogenic conditions to store.
Beneficial effects of the present invention:
1, compared with prior art, this method belongs to the physical treatment method of zero addition, using superhigh pressure technique processing Fresh walnut kernel is not necessarily to any additive, and the nutriment for reducing walnut kernel is lost in, and also better keeps the natural wind of walnut Taste.Under the conditions of 4 DEG C of deepfreezes, long shelf-life can be made up to 1 year, extend the shelf-life.
2, the instant fresh walnut kernel product handled by this method, without complicated pre-treatment, walnut kernel and bitter inner membrance (skin) can be removed easily, and consumer can select gross weight edible or peeling according to personal like, convenient, increase consumer It is alternative.
Specific implementation mode
It, below will be to the preferred reality of the present invention in order to keep the purpose of the present invention, technical solution and advantageous effect clearer It applies example to be described in detail, to facilitate the technical staff to understand.
Embodiment 1
A kind of processing method of instant fresh walnut, specifically includes following steps:
1) fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2) fresh walnut kernel is put into packaging bag, is vacuum-packed, by the pressure treatment 10min of super-pressure 100MPa, obtains To instant fresh walnut kernel product;
3) the instant fresh walnut kernel product that step 2) obtains is placed under 4 DEG C of cryogenic conditions and is stored.
Embodiment 2
A kind of processing method of instant fresh walnut, specifically includes following steps:
1) fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2) fresh walnut kernel is put into packaging bag, is vacuum-packed, by the pressure treatment 5min of super-pressure 300MPa, obtains Instant fresh walnut kernel product;
3) the instant fresh walnut kernel product that step 2) obtains is placed under 4 DEG C of cryogenic conditions and is stored.
Embodiment 3
A kind of processing method of instant fresh walnut, specifically includes following steps:
1) fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2) fresh walnut kernel is put into packaging bag, is vacuum-packed, by the pressure treatment 10min of super-pressure 300MPa, obtains To instant fresh walnut kernel product;
3) the instant fresh walnut kernel product that step 2) obtains is placed under 7 DEG C of cryogenic conditions and is stored.
Embodiment 4
A kind of processing method of instant fresh walnut, specifically includes following steps:
1) fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2) fresh walnut kernel is put into packaging bag, is vacuum-packed, by the pressure treatment 5min of super-pressure 500MPa, obtains Instant fresh walnut kernel product;
3) the instant fresh walnut kernel product that step 2) obtains is placed under 4 DEG C of cryogenic conditions and is stored.
Embodiment 5
A kind of processing method of instant fresh walnut, specifically includes following steps:
1) fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2) fresh walnut kernel is put into packaging bag, is vacuum-packed, by the pressure treatment 10min of super-pressure 500MPa, obtains To instant fresh walnut kernel product;
3) the instant fresh walnut kernel product that step 2) obtains is placed under 10 DEG C of cryogenic conditions and is stored.
Comparative example 1
1) fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2) walnut kernel is immersed in 0.1% polylysine, 0.1% natamycin, 0.1% chitosan and 1.0% Sodium chloride solution.After natural air drying, 4 DEG C of precoolings.
3) fresh walnut kernel after precooling is put into packaging bag, is vacuum-packed, by the pressure treatment of super-pressure 200MPa 10min obtains fresh walnut kernel product;
4) the fresh walnut kernel product that step 3) obtains is placed under 4 DEG C of cryogenic conditions and is stored.
Comparative example 2
1) fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2) walnut kernel is immersed in 1% NaHCO3It in solution, hot dipping 2min and then is transferred quickly in 4 DEG C of cold water, soaks Steep 5min.
3) by treated, fresh walnut kernel is put into packaging bag, and vacuum packaging obtains fresh walnut kernel product;
4) the fresh walnut kernel product that step 3) obtains is placed under 4 DEG C of cryogenic conditions and is stored.
Experimental analysis
Embodiment 1-5 and the fresh walnut product quality that conventional method (comparative example 1-2) is handled are compared, as a result such as table Shown in 1.
The fresh walnut quality versus of 1 embodiment 1-5 of table and comparative example 1-2 processing
As seen from the above table, the fresh walnut product by super-pressure 100-550MPa processing can reache a certain level fresh-keeping Effect.Wherein, the fresh walnut product through super-pressure 100MPa processing, can store 4 months, and part core under the conditions of deepfreeze Peach endothelium is not allowed easily peelable.It is more by the residual of raw microorganism in the inner later, lead to own metabolism oxidation, the bag that occurs rising is existing As in turn resulting in nutriment loss.And the fresh walnut product Jing Guo 300MPa or more ultra high pressure treatments, peeling effect and fresh-keeping Effect is preferable, and the shelf-life, it is existing to will appear the bag that rises for part walnut later up to 12 months, but due to there being raw microorganism in a small amount of As.It is best by the fresh walnut product peeling effect and fresh-keeping effect of 550MPa ultra high pressure treatments, under the conditions of deepfreeze, protect The matter phase is up to 1 year, does not occur bag phenomenon that rises.
The sample that 300MPa-550MPa is handled, preservation effect are calculated from actual count.Processing time is typically chosen 5 Minute or more, 5-10min is typically chosen in actual production, processing time is longer, and production cost is higher.4-10 DEG C of reserve temperature is Can, temperature is lower, and the cost of storage is higher.
Currently, the fresh walnut resting period is longer, dehydration effect can lead to walnut drying shrinkage, and oxygen is generated with contacting external air Changing reaction and the effect of walnut own metabolism etc. can cause walnut discoloration, nutriment to be lost in.Simultaneously as microbial action is easy Cause walnut to go mouldy, stores walnut in humid conditions and there is also germination phenomenon.
Compared with conventional method, this method belongs to the physical treatment method of zero addition, and sealing vacuum preserves isolation air, adopts The fresh walnut kernel processed with superhigh pressure technique reduces autoxidation without any additive by reducing its internal enzymatic activity Reduction reaction, and then the nutriment for reducing walnut kernel is lost in, and has preferably kept the natural flavor of walnut.Kill core simultaneously Microorganism in peach reduces iso-metamorphism phenomenon of going mouldy caused by microorganism.The walnut kernel product resting period of 550MPa processing is most It is long, long shelf-life can be made up to 1 year, effectively extend the shelf-life.
Furthermore the instant fresh walnut kernel product handled by this method, without complicated pre-treatment, walnut kernel is interior with bitterness Film (skin) can be removed easily, and consumer can select gross weight edible or peeling according to personal like, convenient, increase consumption Person is alternative.
Finally illustrate, preferred embodiment above is only used to illustrate the technical scheme of the present invention and unrestricted, although logical It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be Various changes are made to it in form and in details, without departing from claims of the present invention limited range.

Claims (5)

1. a kind of processing method of instant fresh walnut, it is characterised in that:Specifically include following steps:
1)Fresh green walnut is cleaned, decladding, obtains fresh walnut kernel;
2)Fresh walnut kernel is put into packaging bag, is vacuum-packed, by ultra high pressure treatment, obtains instant fresh walnut kernel product;
3)By step 2)Obtained instant fresh walnut kernel product cryopreservation.
2. a kind of processing method of instant fresh walnut according to claim 1, it is characterised in that:Step 2)In, super-pressure The pressure of processing is 100-550MPa.
3. according to a kind of processing method of instant fresh walnut of claim 1-2 any one of them, it is characterised in that:At super-pressure The pressure of reason is 300-550MPa.
4. a kind of processing method of instant fresh walnut according to claim 1, it is characterised in that:Step 2)In, super-pressure Processing time is 5-10min.
5. a kind of processing method of instant fresh walnut according to claim 1, it is characterised in that:Step 3)In, low temperature storage Tibetan refers to being placed under 4-10 DEG C of cryogenic conditions to store.
CN201810736188.4A 2018-07-06 2018-07-06 A kind of processing method of instant fresh walnut Pending CN108783371A (en)

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CN201810736188.4A CN108783371A (en) 2018-07-06 2018-07-06 A kind of processing method of instant fresh walnut

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113142544A (en) * 2021-04-08 2021-07-23 云南省农业科学院农产品加工研究所 A food processing method using tree tomato as raw material
CN115530235A (en) * 2022-09-29 2022-12-30 中国林业科学研究院林业研究所 Storage and preservation method of fresh hazelnuts

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN101390629A (en) * 2007-09-17 2009-03-25 吴迪男 Naked walhut and processing method thereof
CN103349312A (en) * 2013-07-12 2013-10-16 四川茂华食品有限公司 Process for storing and processing walnuts
CN104542961A (en) * 2015-01-05 2015-04-29 天津商业大学 Method for preserving fresh walnut kernels

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101390629A (en) * 2007-09-17 2009-03-25 吴迪男 Naked walhut and processing method thereof
CN103349312A (en) * 2013-07-12 2013-10-16 四川茂华食品有限公司 Process for storing and processing walnuts
CN104542961A (en) * 2015-01-05 2015-04-29 天津商业大学 Method for preserving fresh walnut kernels

Non-Patent Citations (1)

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Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113142544A (en) * 2021-04-08 2021-07-23 云南省农业科学院农产品加工研究所 A food processing method using tree tomato as raw material
CN115530235A (en) * 2022-09-29 2022-12-30 中国林业科学研究院林业研究所 Storage and preservation method of fresh hazelnuts
CN115530235B (en) * 2022-09-29 2024-03-26 中国林业科学研究院林业研究所 Method for storing and preserving fresh hazelnuts

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