JPS5963134A - Reconstitution of fresh bamboo leaves - Google Patents

Abstract

PURPOSE:After stored in boxes by rapid refrigeration at a specific temperature, fresh bamboo leaves are thawed, inspected in quality and washed with chlorine water to provide fresh bamboo leaves always keeping fresh and bright color and smell throughout the year. CONSTITUTION:Fresh bamboo leaves collected are bundled every a certain number of sheets, a certain number of bundles are put in a box and frozen to their cores rapidly at -30--50 deg.C. Then, they are stored every box at -15--30 deg.C. Further, the frozen bamboo leaves are unbundled, stood for 10-15hr to effect half thawing, then washed with water to effect complete thawing and each leaf is inspected on its quality during washing. After inspection, the leaves are bundled again every fixed number of sheets and their top and tail ends are cut off so that the leaves have a certain size. The bundles of cut bamboo leaves are put in cages, dipped in a hot wter solution containing 0.05-0.5% sodium chloride at 95 deg.C for 10-20min to effect sterilization. Then, they are dipped in cool water at 10-15 deg.C. Finally, the cooled bamboo leaves are showered with washing water containing chlorine continuously and dried to prevent them from bing contaminated with microorganisms.

Description

DETAILED DESCRIPTION OF THE INVENTION The method of the present invention relates to a method for regenerating bamboo leaves in which the leaves are stored for a long period of time and then regenerated as fresh bamboo leaves.

Conventional methods for regenerating bamboo leaves include drying fresh bamboo leaves in the shade or drying them with hot air and layering them several times. However, if fresh bamboo leaves are dried in the shade or with hot air, the tissue of the bamboo leaves may die or be destroyed, and even if they are regenerated, the color of the leaves will fade and lose their freshness, and food products may When used as packaging or rugs, this has been a major cause of decreased commercial value. Unfortunately, since the bamboo leaves are dried and stored, they are often damaged during handling, which also causes a decrease in the yield of bamboo leaves.

The method of this invention solves the above problems by using the following regeneration method.

First, collect Kuma bamboo leaves produced in areas with a lot of snow such as Niigata and Toyama prefectures, for example, with dimensions of 6 crn or more in width and 2011 cm or more in length. If collected after August, the leaves are too hard and easily attract insects, making them unsuitable for use as food packaging or mats.

The raw bamboo leaves collected in this way are tied together as soon as possible (for example, within a day or two) in a certain number (for example, 50 leaves) with strings made of rubber, paper, vinyl, cotton, metal, etc. The process of tying together a certain number of raw bamboo leaves into a certain number of bundles (for example, 1
The process of storing bundles of fresh bamboo leaves in boxes made of paper, wood, metal, or plastic.The whole box containing the bundles of fresh bamboo leaves is placed in a freezer at a temperature of 35°C to -50°C for several days (9 and 90°C). The process of rapidly freezing the core of raw bamboo leaves (for example, for 2 days), the sudden temperature changes in this process and the low temperature traps that cannot inhabit living things, remove the larvae and insects that were attached to the raw bamboo leaves. The eggs are completely killed. In addition, rapid freezing causes the activity of the fibrous tissue in raw bamboo leaves to go into hibernation.

Next, bundles of bamboo leaves that have been frozen to the core are placed in a box at a temperature of 15°C to -15°C.
The process of storing frozen bamboo leaves in a refrigerator at a temperature of 30°C for a long period of time in a hibernating state.Unwrap the bundles of frozen bamboo leaves that have been stored for a long time, separate them into pieces one by one, and store them in a constant temperature room for 1.・
~The process of leaving it for 15 hours and partially defrosting it, and then half defrosting it! - Place the frozen bamboo leaves in a bamboo washing machine for 10 to 20 minutes and thaw them completely while washing them with water. However, there is a quality inspection process in which the damaged bamboo leaves are inspected for insects.Next, the bamboo leaves that have passed the quality inspection are tied together again in a certain number (for example, 50 pieces), and the leading and trailing ends are cut to give a certain size (for example, 18 pieces). A certain number of cut bamboo leaf bundles (for example, 60 bundles) are pressed into a metal, plastic, or bamboo heel, and the whole basket is heated at a temperature of 95°C. for a certain period of time (for example, 15 minutes),
The process of sterilizing the bamboo leaves in boiling water by soaking them in a hot water tank with 0.05 to 0.5 t of salt added.This process removes the oils that have oozed out from the surface of the bamboo leaves, and removes the fibers of the bamboo leaves. Increase the activities of the organization and further strengthen the growth of bamboo leaves.

After that, the sterilized bamboo leaf bundles are immersed in a cold water bath at a temperature of 10°C to 15'C for 30 to 60 minutes, followed by rapid cooling to prevent discoloration.Finally, the cooled bamboo leaves are The process of continuously showering the leaf bundle with cleaning water to which chlorine of o, i to 1.0 P P M is added to prevent drying of the bamboo leaves and prevention of bacteria from the outside air from adhering to the bamboo leaves, After storing bamboo leaves for a long time using this method, fresh bamboo leaves with exactly the same quality as freshly picked leaves can be regenerated. The experimental results for the process φ in the method of this invention are as follows.

Experimental results 1. Prepare 3,000 raw bamboo leaves that have been collected and left for 24 hours, tie 50 of these leaves into 60 bundles as one silk, and store the bundles of tied raw bamboo leaves at -30°C, -35°C,
Place 10 bundles each in freezers at -40℃, -45℃, and -50"C1-55℃ and quickly freeze them. After 48 hours, take them out to check the state of destruction of the fiber tissue of the raw bamboo leaves and the larvae attached to the leaves. When we investigated the growth status of insect eggs, we found that at -30°C, no destruction of the fiber group S paper on raw bamboo leaves was observed, but we found 16 bamboo leaves on which larvae or insect eggs were growing. .

Furthermore, 22 fresh bamboo leaves that had been frozen to the core were discovered. 3. In the temperature range of 35°C to -45°C, the p# tissues of fresh bamboo leaves are destroyed and the growth of larvae or insect eggs. At temperatures between 1° and 50°C, destruction of the fibrous tissue of three raw bamboo leaves was found, but no growth of larvae or insect eggs was observed.

At -55℃, the fibrous tissue of raw bamboo leaves is 13%
I found 232 pieces. No growth of fathers, larvae or insect eggs was observed.

Experimental results 2. Thaw 1 to 10 quality-tested bamboo leaves
Prepare 00 pieces, tie them into 20 bundles of 50 pieces, put them in a metal basket while looking at the tied bunches of bamboo leaves, and wait for 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes. When we investigated the state of destruction and sterilization of the fibrous tissue of bamboo leaves by immersing 4 bundles in a hot water tank at 95°C for 5 minutes, we found that no destruction of the fibrous tissue was observed in the leaves soaked for 5 minutes. Three photos were found to have bacteria such as Escherichia coli growing on them.

After soaking for 10 to 20 minutes, no destruction of fiber tissue or growth of various bacteria was observed on the bamboo leaves.

Although no bacterial growth was observed on the bamboo leaves soaked in 25 molecules of l-11, 18 leaves with destroyed fiber tissues were found.

Experimental results 3. Prepare 20 bundles of bamboo leaves (1 bundle of 50 leaves) that have been sterilized in boiling water and place them in a 10" cooling water tank at 0 to 15 degrees Celsius.
After soaking 10 bundles for 20 minutes and 30 minutes each, we found 25 bamboo leaves that had been soaked for 20 minutes and lacked green color due to insufficient cooling.

No bamboo leaves that were soaked for 30 minutes were found to be lacking in No.

Experimental results 4. 2 sterilized bamboo leaf bundles (1 bundle of 50 leaves)
Prepare 0 bundles and shower 5 bundles each continuously for 1 day, 1', 0 days, 1 month, and 6 months with washing water to which 0.1 to 1.0 P P M of chlorine has been added. When adjusting the adhesion state of bacteria, no bacteria was found in any of the experiments. As described above, when the method for regenerating fresh bamboo leaves of this invention is used, it is possible to
For example, during July, a large number of raw bamboo leaves are collected and quickly frozen to a temperature that does not cause destruction of the fiber tissue and kills larvae and insect eggs attached to the leaves before use. Since you can thaw and regenerate fresh bamboo leaves whenever you want, you can always provide fresh, brightly colored, and odor-free raw bamboo leaves throughout the year.

Claims (1)

[Claims] A method for regenerating bamboo leaves, which comprises the steps (a) to (b) below. (b) A process of tying the collected raw bamboo leaves into a certain number of leaves, (b) A process of storing the bundles of tied raw bamboo leaves in a certain number of boxes, (c) A process of storing each bundle of raw bamboo leaves in a certain number of boxes. 35℃～-50℃
A process of rapidly freezing raw bamboo leaves to the core at a temperature of 15°C to 15°C.
The process of storing the frozen leaves at a temperature of -30℃, θu The process of removing the frozen bamboo leaves from the box, unraveling the frozen bamboo leaves one by one, leaving them for 10 to 15 hours to partially thaw them, (f) The process of thawing the semi-thawed bamboo leaves while washing them with water for 10 to 20 minutes, (G) The process of inspecting the quality of the thawed bamboo leaves while washing them one by one, (7) The process of tying a certain number of bamboo leaves together again after the inspection. Step of cutting the leading and trailing ends to a certain size, (S) Place a certain number of cut bamboo leaves in a basket and heat the basket at a temperature of 95°C for 10 to 20 minutes.
A process of sterilizing the bamboo leaves by immersing them in warm water to which 0.5% salt has been added. (9) Cooling the sterilized bamboo leaves by immersing them together with the basket in cooling water at a temperature of 10°C to 15°C for 30 minutes or more. 00 A step of continuously showering the cooled bamboo leaf bundle with washing water to which 0.1 to 1.0 PPM of chlorine has been added to prevent the bamboo leaves from drying out and bacteria from adhering to them;