KR20160017407A - Mushrooms pretreated by using millimeter wave and method for pretreatment thereof - Google Patents

Abstract

The present invention relates to a mushroom pretreated with millimeter waves and a pretreatment method thereof, wherein a millimeter wave is irradiated to a mushroom to sterilize a microorganism, lowering the rate of freshly cleaved matter, and generally decreasing with time It is possible not only to improve the hardness but also to improve the retraction phenomenon.

Description

[0001] Mushrooms pretreated with millimeter waves and pretreatment methods thereof [0002]

The present invention relates to mushrooms pretreated in a non-heated manner by irradiating mushrooms with millimeter waves and a pretreatment method thereof.

Mushroom is a nutrient-requiring microorganism that does not have photosynthesis and uses organic form of carbon. It is a generic term for fungi. It is a type of fungi that is produced by spores (fungi) And most of them belong to the bacterium family, and the part used for the edible use of the mushrooms is the fruit body part.

There are more than 180 kinds of mushrooms which are currently being edible, and they are divided into three types: edible mushrooms, medicinal mushrooms, and poisonous mushrooms. Natural mushrooms that can not be cultivated include matsutake mushroom, chestnut mushroom, mushroom mushroom, and mulberry mushroom. Cultivated mushrooms include shiitake mushroom, oyster mushroom, mushroom mushroom, and medicinal mushroom.

The general composition of the mushrooms is similar to that of vegetables, and the content of ergosterol, provitamin D2, is high. In addition, mushrooms have a high palatability because they have a lot of enzymes and are easy to deteriorate and have a unique flavor (flavor, taste).

In addition, mushrooms that have been naturally grown at room temperature have been reported to have an antiviral effect and a lowering effect on blood cholesterol, and it is known that not only a large amount of important nutrients such as amino acids, vitamins, proteins, inorganic salts, enzymes, polysaccharides, It has recently been shown that it contains an ingredient called erytadenine, which reduces cholesterol, and has anticancer effects.

On the other hand, a millimeter wave refers to a certain frequency band (30 to 300 GHz) among frequencies of a microwave (300 MHz to 300 GHz), and is a frequency band which is not yet used in the food field.

Microwave applications for food originate from the principle of the generation of vibrational heat as a result of the absorption of the innumerable short wavelengths in the frequency band between 300 MHz and 300 GHz by food materials and for the first time since the end of World War II And has begun to be applied to new devices for cooking food. The first food appliance was a microwave oven made by General Electric Company of the United States, which was used mainly for heating sausage, hamburger, and sandwich. At this time, the permitted frequencies are slightly different for each country depending on the purpose of use, and mainly use 915 ± 25 MHz and 2450 ± 50 MHz.

Therefore, there is a need for a method for pretreating mushrooms which can be stored for a long time while retaining texture as a fresh food which has not been subjected to heat treatment using a specific frequency band, and which can have excellent functionality.

Korean Patent No. 0749215 Japanese Patent Application Laid-Open No. 2005-0062032

It is an object of the present invention to provide mushrooms which have been pretreated in a non-heated manner by irradiating mushrooms with millimeter waves.

Another object of the present invention is to provide a method of pretreating mushrooms with millimeter waves.

It is still another object of the present invention to provide a method for increasing the distribution period of mushrooms.

It is still another object of the present invention to provide a method for lowering the rate of freshly extracted mushrooms.

It is still another object of the present invention to provide a method for enhancing the hardness of mushrooms.

It is another object of the present invention to provide a method for improving the backwardness of mushrooms.

In order to accomplish the above object, the present invention provides a pretreatment method for mushrooms which irradiates mushrooms with a millimeter wave having a frequency of 30 to 300 GHz.

The frequency of the millimeter wave may be 30 to 150 GHz, preferably 35 to 70 GHz.

The irradiation time of the millimeter wave may be 10 to 2500 seconds.

The mushrooms may include at least one selected from the group consisting of mushroom mushroom, shiitake mushroom, mushroom mushroom, mushroom mushroom, oyster mushroom and mushroom mushroom.

In order to achieve the above object, the pretreated mushroom of the present invention may be irradiated with a millimeter wave having a frequency of 30 to 300 GHz.

The frequency of the millimeter wave may be 35 to 70 GHz, and the irradiation time of the millimeter wave may be 10 to 2500 seconds.

According to another aspect of the present invention, there is provided a method for increasing the circulation period of mushrooms in refrigerated or normal temperature (20 to 28 ° C) by irradiating a millimeter wave having a frequency of 30 to 300 GHz.

According to another aspect of the present invention, there is provided a method for lowering the rate of freshly extracted mushrooms by irradiating a millimeter wave having a frequency of 30 to 300 GHz.

According to another aspect of the present invention, there is provided a method of increasing the hardness of mushrooms by irradiating a millimeter wave having a frequency of 30 to 300 GHz.

According to another aspect of the present invention, there is provided a method for improving mushroom backlog by irradiating a millimeter wave having a frequency of 30 to 300 GHz.

The pretreated mushroom of the present invention can sterilize a large amount of aerobic bacteria, Escherichia coli, yeast and fungi by irradiating millimeter waves to mushrooms, and it is also possible to produce aerobic bacteria, Escherichia coli, yeast and mold Can be suppressed.

In addition, the pretreated mushrooms of the present invention are excellent in quality because they do not exceed 50% of the freshness of the mushroom even over time, and they are not restored even in the course of time and increase hardness and inhibit the production of microorganisms, Long-term preservation is possible. Generally, when a microwave (microwave) used for food is irradiated, heat is applied to the mushroom, and the rate of heat removal is much higher than 50%, the hardness is reduced and the mushroom is easily repelled. The pretreated mushroom of the present invention has a millimeter wave The opposite effect can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of an apparatus for emitting millimeter waves according to an embodiment of the present invention.

The present invention relates to mushrooms pretreated in a non-heated manner by irradiating mushrooms with millimeter waves and a pretreatment method thereof.

Hereinafter, the present invention will be described in detail.

The present invention relates to a pretreatment method for irradiating mushrooms with a millimeter wave.

Microwaves are collectively referred to as radio waves having a frequency of 300 MHz to 300 GHz (wavelength: 1 mm to 1 m), and a frequency band of 30 to 300 GHz (wavelength: 1 to 10 mm) is referred to as a millimeter wave do. Since the millimeter wave is very close to the light in the middle between the currently used radio frequency band and the infrared ray (about 0.1 mm in wavelength), it is usually used in high resolution radar or microwave spectroscopy and is not used in the food field.

The millimeter wave according to the present invention irradiates mushrooms with a frequency of 30 to 150 GHz, preferably 35 to 70 GHz, for 10 to 2500 seconds, preferably 30 to 1800 seconds. Since the millimeter wave is not affected by the temperature, the temperature at the time of irradiation is not critical, but millimeter waves are preferably irradiated at a room temperature of 0 to 30 占 폚.

If the frequency of the millimeter wave is lower than the lower limit value, there is no sterilizing effect and the fresh heat removal rate can be increased. If the frequency is higher than the upper limit value, the texture and the sensibility can be lowered.

If the irradiation time of the millimeter wave is less than the lower limit value, the sterilizing effect is not obtained and the fresh heat removal rate can be increased. If the irradiation time exceeds the upper limit value, the fresh heat removal rate is increased, the sensibility is decreased, and it can be easily retracted.

The mushrooms pretreated with the millimeter wave have low freshness and hardness and do not retreat. Specifically, millimeter waves are irradiated for 40 to 800 seconds, preferably 60 to 300 seconds, after which the freshly isolated rate is 15 to 40% ; The hardness is improved by 3 to 20% after irradiation of the millimeter wave for 40 to 1600 seconds, preferably 60 to 900 seconds; Millimeter waves were irradiated for 40 to 1600 seconds, preferably 60 to 900 seconds, and the physical load was improved by 3 to 20% (not retracted). The freshness ratios are based on the 7th day of storage at 4 ° C, and the hardness and backwardness are based on the 5th day of storage at 4 ° C.

In addition, the pretreated mushroom may be used as a processed food processed by roasting, grinding, roasting, drying and the like.

The mushrooms include at least one selected from the group consisting of mushroom mushroom, shiitake mushroom, mushroom mushroom, mushroom mushroom, oyster mushroom and mushroom mushroom.

The millimeter wave of the present invention is irradiated through the millimeter wave generator 100 of FIG. 1, and when the optimum frequency is searched, the optimal frequency absorption region is scanned through the generator 100, Search for frequency.

The millimeter wave generator 100 includes a millimeter wave generator 110, a duplexer and a circulator 120, an antenna 130, and a signal and data a display and record unit 150, and a control and power supply unit 160. In addition,

The millimeter wave generator 110 is a device that emits a millimeter wave so that millimeter waves can be scattered through the antenna 130.

The duplexer and the coupler unit 120 are coupled to a duplexer and a caculator. In the duplexer, power can be transmitted in both directions of transmission and reception, and millimeter waves can be transmitted from both sides at the same time. Also, the circuit is a circuit in which the direction of input and output is set cyclically between terminals having many directions.

The antenna unit 130 may irradiate millimeter waves to the food by spraying the millimeter wave applied from the millimeter wave generator 110 in the air. Also, when searching for the optimum frequency, it can be used to scan the optimal frequency absorption region.

The signal processing unit 140 controls signals according to transmission / reception of input / output signals and control information.

The storage and display unit 150 stores a command or data to be processed in a memory and visually expresses data on a monitor.

The power supply control and supply unit 160 controls power on and off of each element constituting the millimeter wave generator 100 or monitors a power supply anomaly state.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. Such variations and modifications are intended to be within the scope of the appended claims.

Production Examples 1 to 6.

The millimeter wave (port ELM program) at 0 GHz, 20 GHz, 50 GHz, 70 GHz, 100 GHz and 200 GHz frequency was irradiated to 1 kg of mushroom mushroom for 60 seconds at room temperature.

≪ Test Examples 1 and 2 &

The millimeter-wave irradiated mushroom was placed in a polyethylene packaging film and stored at 4 ° C. to measure the change with storage time.

Test Example 1. Measurement of aerobic bacteria count

For the microbial analysis using the dry film culture method, 5 g of the sample was taken and 45 ml of sterilized 0.85% physiological saline was mixed and homogenized for 3 minutes using a stomacher (Bagmixer 400, Interscience, Co., Saint Nom, France) 1 ml of each sample solution was diluted with 9 ml of dilution. The culture broth was purchased from 3M Co., Inc. (USA), and the plate count agar (Difco Lab.) Was used for the dry film culture. The number of bacteria was expressed as log colony forming unit (log CFU / g) .

division Aerobic bacteria (log CFU / g) 0 day 3 day 5 day 7 day Production Example 1 Untreated 6.09 6.55 6.58 7.02 Production Example 2 20 GHz 6.05 5.84 6.43 6.80 Production Example 3 50 GHz 6.10 5.99 6.29 6.72 Production Example 4 70 GHz 6.20 6.04 6.56 6.81 Production Example 5 100 GHz 5.94 6.26 6.64 6.86 Production Example 6 200 GHz 6.17 6.38 6.78 6.94

As shown in Table 1, it was confirmed that Production Examples 2 to 6 irradiated with millimeter waves had less aerobic bacteria than Production Example 1 not irradiated with millimeter waves.

In particular, the lowest aerobic bacterium of mushrooms of Production Examples 2 and 3 was detected.

Test Example  2. Sensuality  inspection

The mushrooms were stored for 7 days in a millimeter wave and stored for 5 minutes. The mushrooms were then tasted by 12 professional panelists and then subjected to sensory evaluation by a 9-point scale. The results are shown in Table 2 below.

- Appearance preference degree, taste, texture, comprehensive preference degree: 1 point = very bad, 9 point = very good

division Appearance flavor Texture Comprehensive preference Production Example 1 Untreated 4.12 3.05 3.25 3.70 Production Example 2 20 GHz 4.80 4.75 4.10 4.25 Production Example 3 50 GHz 6.50 5.95 5.20 5.25 Production Example 4 70 GHz 6.05 5.20 4.95 5.00 Production Example 5 100 GHz 5.75 4.85 4.20 4.85 Production Example 6 200 GHz 5.05 4.75 4.00 3.95

As shown in Table 2, the mushrooms of Production Examples 2 to 6 were superior to those of Production Example 1 in terms of appearance taste, taste, texture and overall taste.

Particularly, in Production Example 3, a large number of aerobic bacteria were killed over time, and it was confirmed that the product had excellent appearance taste, taste, texture and overall taste as compared with Production Examples 1, 2 and 4 to 6.

In addition, the optimal frequency absorption region for the mushroom was scanned (using a port ELM program), and it was found that the optimal frequency was 54.47 GHz in conjunction with the auto scan.

In Test Examples 1 and 2, the mushroom of Preparation Example 3 irradiated with a frequency of 50 GHz was superior to the mushroom mushroom irradiated at different frequencies, and the result of the auto-scan was 54.47 GHz. And a frequency of 54.47 GHz was used as a millimeter wave frequency.

Example  1. Mushroom mushroom + 54.47 GHz

Millimeter waves of 54.47 GHz frequency were examined over time in 1 kg of mushroom mushroom at room temperature.

Example  2. Oyster mushroom + 54.47 GHz

The same procedure as in Example 1 was carried out except that Mushroom mushroom was used instead of Mushroom mushroom.

Comparative Example  One. Mushroom mushroom + 0 sec

The same procedure as in Example 1 was carried out except that the millimeter wave was not processed.

Comparative Example  2. Oyster mushroom + 0 second

The same procedure as in Example 2 was carried out except that the millimeter wave was not processed.

< Test Example  3 to 7>

The mushrooms treated according to the above Examples and Comparative Examples were placed in a polyethylene packaging film and stored at 4 ° C. to measure the change with storage period.

Test Example  3. Measurement of aerobic bacteria count

The number of bacteria was measured in the same manner as in Test Example 1 above.

division 0 day 1 day 3 day 5 day 7 day Comparative Example 1 Untreated 6.09 6.54 6.55 6.58 7.02 Example 1 30 seconds 6.20 5.84 5.92 6.10 6.13 60 seconds 6.10 5.68 5.86 6.24 6.70 300 seconds 6.53 5.97 6.25 6.49 6.54 900 seconds 5.71 5.99 6.03 6.07 6.44 1800 seconds 6.05 6.08 6.34 7.17 6.97 Comparative Example 2 Untreated 6.05 6.34 6.68 6.84 7.12 Example 2 30 seconds 6.13 5.62 5.73 5.89 5.94 60 seconds 6.34 6.04 6.28 6.53 6.72 300 seconds 6.51 6.00 6.31 6.62 6.88 900 seconds 6.21 6.11 6.27 6.40 6.53 1800 seconds 6.06 6.07 6.38 6.67 6.86

As shown in the above Table 3, the number of aerobic microorganisms produced in Examples 1 and 2 of the present invention is not reduced or increased much compared with Comparative Examples 1 and 2, so that when millimeter waves are irradiated, the growth of aerobic microorganisms . &Lt; / RTI &gt;

Especially, mushrooms irradiated with millimeter wave for 30 seconds showed that the number of aerobic microorganisms decreased by 7 days.

Test Example  4. Coliform number  Measure

For the microbial analysis using the dry film culture method, 5 g of the sample was taken and 45 ml of sterilized 0.85% physiological saline was mixed and homogenized for 3 minutes using a stomacher (Bagmixer 400, Interscience, Co., Saint Nom, France) 1 ml of each sample solution was diluted with 9 ml of dilution. The culture medium was purchased from 3M Co., Ltd. (Minnesota, USA), and E. coli and E. coli (PEC, 3M) were used as the dry film medium. The number of bacteria was expressed as log colony forming unit (log CFU / g) per 1 g of sample.

division 0 day 1 day 3 day 5 day 7 day Comparative Example 1 Untreated 4.41 3.30 3.50 5.00 5.00 Example 1 30 seconds 3.50 3.97 4.10 4.31 3.50 60 seconds 3.50 3.58 3.00 3.58 4.44 300 seconds 3.50 3.83 3.74 3.65 4.00 900 seconds 3.50 3.93 4.00 5.02 3.48 1800 seconds 3.00 N.D. N.D. N.D. N.D. Comparative Example 2 Untreated 4.56 4.19 4.51 4.89 4.98 Example 2 30 seconds 3.43 3.37 3.59 3.81 3.73 60 seconds 3.52 3.68 3.81 4.08 4.29 300 seconds 3.49 3.21 3.58 3.73 3.91 900 seconds 3.45 3.13 3.38 3.22 3.31 1800 seconds 3.01 N.D. N.D. N.D. N.D.

N.D .: Not detected

As shown in Table 4 above, the mushrooms prepared according to Examples 1 and 2 of the present invention do not show much increase in the number of E. coli compared to Comparative Examples 1 and 2, so that irradiation with millimeter waves can inhibit the growth of E. coli Respectively.

Especially, the number of E. coli was decreased on the 7th day after storage for 900 to 1800 seconds, and the number of E. coli was not detected on the 1st day after storage for 1800 seconds.

Test Example  5. Yeast and mold

For the microbial analysis using the dry film culture method, 5 g of the sample was taken and 45 ml of sterilized 0.85% physiological saline was mixed and homogenized for 3 minutes using a stomacher (Bagmixer 400, Interscience, Co., Saint Nom, France) 1 ml of each sample solution was diluted with 9 ml of dilution. The medium was purchased from 3M Co., Inc. (USA), and yeast and mold (PYM, 3M) were used as the dry film medium. The number of bacteria was expressed as log colony forming unit (log CFU / g) per 1 g of sample.

division 0 day 1 day 3 day 5 day 7 day Comparative Example 1 Untreated 5.09 5.00 5.21 5.38 5.49 Example 1 30 seconds 4.60 4.88 5.03 5.21 5.37 60 seconds 5.01 4.73 4.71 4.71 4.94 300 seconds 5.11 5.18 5.26 5.34 5.21 900 seconds 5.15 5.22 5.28 5.30 5.34 1800 seconds 5.29 5.31 5.39 5.43 5.48 Comparative Example 2 Untreated 5.16 5.05 5.34 5.57 5.64 Example 2 30 seconds 5.04 5.00 5.21 5.38 5.45 60 seconds 5.16 4.88 4.97 5.00 5.01 300 seconds 4.99 4.91 5.19 5.23 5.33 900 seconds 5.07 5.01 5.22 5.37 5.48 1800 seconds 5.13 4.96 5.19 5.40 5.52

As shown in Table 5, the mushrooms prepared according to Examples 1 and 2 of the present invention do not increase the number of yeasts and molds much as compared with Comparative Examples 1 and 2. Therefore, when millimeter waves are irradiated, the growth of E. coli is suppressed .

In particular, the number of yeast and fungi was reduced on the 7th day after storage for 60 seconds in millimeter wave.

Test Example  6. Freshly Cleavage rate  Measure

The amount of mushrooms that were completely cleared from each pavement was investigated and the ratio of mushrooms in the whole mushroom to the total number of mushrooms in the pavement was expressed as a percentage.

division 1 day 3 day 5 day 7 day Comparative Example 1 Untreated 0.0 23.4 31.9 70.2 Example 1 30 seconds 0.0 23.5 24.5 59.4 60 seconds 0.0 7.4 12.6 18.3 300 seconds 0.0 13.9 35.1 37.6 900 seconds 0.0 41.8 58.7 61.2 1800 seconds 0.0 51.4 62.7 68.9 Comparative Example 2 Untreated 0.0 49.8 61.5 72.4 Example 2 30 seconds 0.0 26.2 38.4 54.8 60 seconds 0.0 6.4 11.7 17.6 300 seconds 0.0 16.9 30.5 38.4 900 seconds 0.0 39.7 52.8 63.7 1800 seconds 0.0 46.9 67.4 70.2

As shown in Table 6 above, it was confirmed that the mushrooms prepared according to Examples 1 and 2 of the present invention had a lower rate of freshly opened than Comparative Examples 1 and 2.

Generally, it is judged that the quality of the mushroom may be deteriorated when the freshness of the freshness is over 50%. If the millimeter wave is irradiated for 60 to 300 seconds, the freshness is less than 50% Respectively.

Test Example  7. Measurement of texture

The texture of the mushrooms treated according to the above examples and comparative examples was measured using a blade with a flat end at a pre-test speed of 2 mm / sec, a test speed of 4 mm / sec, a post-speed of 10 mm / 45 mm.

division 0 day 1 day 3 day 5 day 7 day Hardness (kg) Comparative Example 1 Untreated 1.40 1.36 1.35 1.36 1.35 Example 1 30 seconds 1.87 1.33 1.41 1.43 1.52 60 seconds 1.50 1.65 1.37 1.63 1.38 300 seconds 1.74 1.63 2.00 1.79 1.60 900 seconds 1.35 1.39 1.34 1.53 1.10 1800 seconds 1.62 1.79 1.00 1.30 1.57 Comparative Example 2 Untreated 1.43 1.42 1.40 1.37 1.34 Example 2 30 seconds 1.72 1.70 1.61 1.50 1.46 60 seconds 1.56 1.67 1.73 1.79 1.50 300 seconds 1.49 1.54 1.59 1.73 1.44 900 seconds 1.33 1.41 1.48 1.51 1.21 1800 seconds 1.60 1.53 1.49 1.46 1.46 gradient
(kg / sec) Comparative Example 1 Untreated 1.20 0.77 0.58 0.56 0.48 Example 1 30 seconds 1.38 0.84 0.87 0.76 0.59 60 seconds 1.65 1.41 1.11 1.75 0.56 300 seconds 1.49 1.30 1.93 1.54 0.73 900 seconds 0.68 1.02 0.81 0.75 0.59 1800 seconds 1.08 1.43 0.50 0.44 0.53 Comparative Example 2 Untreated 1.17 0.84 0.71 0.59 0.56 Example 2 30 seconds 1.26 0.99 0.70 0.65 0.61 60 seconds 1.38 1.68 1.69 1.54 0.54 300 seconds 1.60 1.76 1.83 1.74 0.66 900 seconds 1.17 1.53 1.41 1.35 0.59 1800 seconds 1.44 1.01 0.75 0.64 0.61

As shown in Table 7, the mushrooms prepared according to Examples 1 and 2 of the present invention had a hardness of 3 to 20% when irradiated with a millimeter wave for 60 to 900 seconds on the fifth day of storage, Respectively.

On the other hand, it was confirmed that the hardness decreased in Comparative Examples 1 and 2 in which millimeter waves were not irradiated, and in millimeter waves irradiated in 30 seconds and 1800 seconds.

Also, the gradient is a slope of the peak interval from zero point, and even if the sample shows the same force, it can be confirmed that the slope of the slope depends on the degree of the slope. The mushrooms prepared according to Examples 1 and 2 of the present invention were found not to retract because the gradient was increased by 3 to 20% as compared to Day 0 when the millimeter wave was irradiated for 60 to 900 seconds on the fifth day of storage.

On the other hand, in Comparative Examples 1 and 2 in which millimeter waves were not irradiated, those in which millimeter waves were irradiated for 30 seconds and 1800 seconds were found to be in progress.

In addition, it was confirmed that after the millimeter wave was irradiated for 60 to 900 seconds, the hardness became lower and the retraction progressed after 5 days.

Test Example  8. Sensuality  inspection

The mushrooms of the pretreated and comparative examples stored for 7 days were irradiated with millimeter waves and boiled for 5 minutes and then tasted by 12 professional panelists. The sensory evaluation was then carried out using the 9-point scale method, Respectively.

- Appearance preference degree, taste, texture, comprehensive preference degree: 1 point = very bad, 9 point = very good

division 0 day 1 day 3 day 5 day 7 day Appearance Comparative Example 1 Untreated 5.25 5.00 5.05 4.65 4.12 Example 1 30 seconds 7.35 7.00 6.55 6.15 6.00 60 seconds 7.40 7.15 6.85 6.65 6.60 300 seconds 7.30 7.10 6.85 6.45 6.20 900 seconds 7.00 6.70 6.10 5.90 5.80 1800 seconds 6.75 6.25 6.00 5.70 5.50 Comparative Example 2 Untreated 5.10 5.00 4.55 4.20 4.05 Example 2 30 seconds 6.80 6.50 6.15 5.80 5.75 60 seconds 7.25 7.05 6.70 6.45 6.45 300 seconds 7.35 7.10 6.50 6.15 6.00 900 seconds 6.90 6.50 6.10 5.85 5.75 1800 seconds 6.85 6.75 6.05 5.50 5.35 flavor Comparative Example 1 Untreated 4.85 4.25 4.00 4.35 3.05 Example 1 30 seconds 7.00 6.20 5.90 5.65 5.55 60 seconds 7.20 7.00 6.55 6.10 6.05 300 seconds 7.10 6.95 6.20 5.85 5.60 900 seconds 6.80 6.60 6.15 5.40 5.10 1800 seconds 6.45 6.05 5.25 4.90 4.75 Comparative Example 2 Untreated 4.55 4.05 3.65 3.10 2.85 Example 2 30 seconds 6.85 6.25 6.10 5.70 5.50 60 seconds 7.05 6.75 6.40 6.15 6.10 300 seconds 7.00 6.55 6.05 5.70 5.45 900 seconds 6.50 6.10 5.65 5.00 4.85 1800 seconds 6.15 5.85 5.00 4.75 4.60 Texture Comparative Example 1 Untreated 4.80 4.50 4.00 3.35 3.25 Example 1 30 seconds 6.55 6.10 5.65 4.95 4.70 60 seconds 7.10 6.45 6.15 5.70 5.35 300 seconds 7.15 6.55 5.75 5.20 5.05 900 seconds 6.85 6.10 5.55 5.05 4.75 1800 seconds 6.40 5.90 5.25 4.55 4.20 Comparative Example 2 Untreated 4.65 4.20 3.80 3.25 3.00 Example 2 30 seconds 6.65 6.15 5.70 5.10 4.55 60 seconds 7.05 6.30 5.80 5.25 5.10 300 seconds 6.90 6.10 5.35 4.95 4.85 900 seconds 6.55 6.05 5.55 4.60 4.40 1800 seconds 6.10 5.75 5.10 4.20 4.15 Comprehensive likelihood Comparative Example 1 Untreated 4.95 4.20 3.80 3.95 3.70 Example 1 30 seconds 5.80 5.30 4.90 4.60 4.55 60 seconds 6.25 6.00 5.70 5.45 5.35 300 seconds 6.50 6.10 5.80 5.15 5.05 900 seconds 5.95 5.25 5.05 4.85 4.65 1800 seconds 5.40 5.10 5.05 4.40 4.25 Comparative Example 2 Untreated 4.80 4.45 4.05 3.85 3.55 Example 2 30 seconds 5.95 5.35 5.00 4.85 4.60 60 seconds 6.35 6.05 5.75 5.35 5.20 300 seconds 6.00 5.25 5.45 5.00 4.95 900 seconds 5.55 5.10 4.80 4.85 4.50 1800 seconds 5.20 5.25 4.65 4.15 4.05

As shown in Table 8, it was confirmed that the mushrooms prepared according to Examples 1 and 2 of the present invention are superior to Comparative Examples 1 and 2 in appearance taste, taste, texture and overall taste.

100: millimeter wave generator 110: millimeter wave generator
120: Duplex and Culician section 130: Antenna section
140: signal processing device part 150: storage and display part
160: Power control and supply unit

Claims (11)

Wherein the mushroom is irradiated with a millimeter wave having a frequency of 30 to 300 GHz. The method according to claim 1, wherein the frequency of the millimeter wave is 35 to 70 GHz. The method according to claim 1, wherein the irradiation time of the millimeter wave is 10 to 2500 seconds. [3] The method according to claim 1, wherein the mushroom is at least one selected from the group consisting of mushroom mushroom, shiitake mushroom, mushroom mushroom, mushroom mushroom, oyster mushroom and mushroom mushroom. Wherein mushrooms are irradiated with a millimeter wave having a frequency of 30 to 300 GHz and circulated in a cold state or at a normal temperature, and mushrooms pretreated with millimeter waves. 6. The mushroom pretreated with millimeter waves according to claim 5, wherein the frequency of the millimeter wave is 35 to 70 GHz. 6. The mushroom pretreated with millimeter waves according to claim 5, wherein the irradiation time of the millimeter wave is 10 to 2500 seconds. A method of increasing the shelf life of fresh mushrooms at refrigeration or at room temperature by irradiating mushrooms with millimeter waves having a frequency of 30 to 300 GHz. A method of lowering the rate of fresh mushrooms by irradiating mushrooms with millimeter waves having a frequency of 30 to 300 GHz. A method of increasing the hardness of mushrooms by irradiating mushrooms with millimeter waves having a frequency of 30 to 300 GHz. A method of improving the retraction of mushrooms by irradiating mushrooms with millimeter waves having a frequency of 30 to 300 GHz.

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