JP2002320465A - Raw sea urchin product having prolonged best-before- date and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a raw sea urchin product having a prolonged time period of minimum durability. SOLUTION: This method for producing the raw sea urchin product comprises treating the sea urchin with an aqueous solution of an alkali while making the sea urchin live, then washing or neutralizing the aqueous solution of the alkali sticking to the treated sea urchin and subsequently taking out the ovary from the treated sea urchin or taking out the ovary from the raw sea urchin once, then treating the resultant ovary with the aqueous solution of the alkali and subsequently washing or neutralizing the aqueous solution of the alkali sticking to the ovary of the treated raw sea urchin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw sea urchin product having an extended shelf life and a method for producing the same.

[0002]

2. Description of the Related Art Sea urchins are raw foods mainly composed of ovaries of sea urchins, and are prized in Japan as a kind of delicacy. However, since sea urchins are easily rotted by various bacteria, it is necessary to eat ovaries taken out as soon as possible after capture. Normally, the ovary of a raw sea urchin rots in about two days at room temperature, causing drooling and odor. On the other hand, there is also a method of storing raw sea urchin ovary in a frozen state, which certainly extends the shelf life of the raw sea urchin ovary, but upon thawing, the ovary deteriorates or deteriorates immediately, resulting in dropout or smell. Or occur.

Therefore, even after thawing, it is necessary to taste the ovary of the raw sea urchin as soon as possible. As described above, the ovary of the raw sea urchin is easily deteriorated, and therefore, in the market, for example, at a wholesale or retail stage, an appropriate amount of purchase corresponding to the demand is performed. Usually, it is very difficult to store and manage the ovary of the raw sea urchin, such as the need to sell it out as soon as possible. Those that do not sell out within a predetermined short shelf life are discarded, wasting or wasting resources. Also, at home, if an amount larger than the demand at home is purchased or obtained, it may not be consumed at home, and in such a case, it is wasted. Therefore, obtaining the ovary of the raw sea urchin whose expiration date is greatly extended is very preferable in facilitating the handling of the raw sea urchin and preventing waste of resources. However, a method for extending the ovarian shelf life of raw sea urchins has not been proposed so far.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a raw sea urchin product having an extended shelf life.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that after treating a sea urchin with an alkaline aqueous solution while alive, the alkaline aqueous solution attached to the treated sea urchin is washed. Or by neutralizing and then removing the ovaries from the treated sea urchins, or once removing the ovaries from the raw sea urchins, the resulting ovaries are treated with an aqueous alkaline solution and then treated The inventors have found that the above-mentioned problems can be solved by washing or neutralizing the alkaline aqueous solution attached to the ovaries of sea urchins, and have reached the present invention. The present inventor has unexpectedly found that the fresh yellow color of the ovary of the raw sea urchin is less likely to deteriorate or brown,
It was also found that the elasticity and volume of the obtained ovaries were maintained for a long period of time.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. Sea urchins are a kind of echinoderms, and their friends include, for example, bahun sea urchins, akauni, and purple sea urchins. The sea urchin to which the present invention is applied is not particularly limited, and various sea urchins can be used as long as it is a member of the echinoderm sea urchin and is edible.

In the present invention, sea urchins may be those immediately after capture on a ship or the like in coastal waters or the like, or those obtained by freezing or chilling the captured sea urchin and then thawing it. However, immediately applying the present invention to those caught on board from the ship, from the viewpoint of extending the shelf life,
Most preferred. The earlier the sea urchin ovaries are removed from fresh or freshly caught sea urchins, the better the freshness and the longer the shelf life can be.

When the sea urchin dies, decay progresses from the body surface and internal organs. The part of the ovary located adjacent to the rotten organs also gradually rots after the sea urchin dies. While alive, spoilage is prevented, but it is still contaminated with germs. After death, it is considered that spoilage progresses due to the growth of the germs. Therefore, if the ovary of the sea urchin is taken out and left to stand, its decay progresses gradually as well as rapidly, and more rapidly after its death. Therefore, performing the treatment of the present invention on sea urchin as fresh as possible or performing the treatment of the present invention as soon as possible after removing the ovaries from the fresh sea urchin is very suitable in terms of obtaining a long shelf life. It is.

In the present invention, it is considered that such a germ can be killed or removed by treatment with an alkaline aqueous solution. For this reason, after performing this treatment, it is possible to preserve freshness for a long period of time even in the ovary of a raw sea urchin. In addition, various effects as described below can be obtained. In the present invention, first, the captured sea urchin is allowed to survive as it is in an alkaline aqueous solution, or an ovary is taken out of the captured sea urchin and treated with an alkaline aqueous solution. Sea urchins are
You can live for a while. During its life, sea urchins
By repeatedly inhaling and discharging the alkaline aqueous solution, the internal organs, particularly the seawater of the digestive system are replaced with the alkaline aqueous solution, and various bacteria living in the internal organs and ovaries adjacent thereto are killed or sterilized. For this reason, the shelf life of the obtained raw sea urchin ovaries is greatly extended.

As the alkaline aqueous solution to be used, for example, a solution in which an alkaline agent is dissolved in water can be used. As the alkali agent, various alkali agents can be used as long as they can impart alkalinity to the aqueous solution. Such alkaline agents include, for example, calcium oxide, sodium hydroxide, potassium hydroxide, calcium hydroxide, disodium hydrogen phosphate, trisodium phosphate, dipotassium hydrogen phosphate, tripotassium phosphate, diammonium hydrogen phosphate, polyammonium, and the like. Examples include sodium phosphate, potassium polyphosphate, calcium phosphate, magnesium carbonate, ammonium carbonate, sodium carbonate, potassium carbonate, calcium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, and the like. These alkaline agents may be used alone or as a mixture.
Examples of these alkaline agents include readily available materials such as calcium oxide, calcium carbonate, and sodium carbonate.

The treatment with an alkaline aqueous solution is performed, for example, by immersing the sea urchin immediately after being captured in an alkaline aqueous solution, or after removing the ovaries, immersing the ovary in an alkaline aqueous solution or spraying the alkaline aqueous solution. Can be done by The raw sea urchin or its ovary may be frozen or frozen in a immersed state. In such a case, the subsequent washing or neutralization can also be performed by immersing in water or an acidic solution or the like when thawing at a factory or the like after freezing or frozen transportation. In particular, when the raw sea urchin or its ovary is immersed or frozen or frozen, the elasticity of the ovary is greatly improved. The fresh color of the ovaries is also preserved for a long time.

The pH of the alkaline aqueous solution is the pH of seawater.
(Approximately 8.2). For example, in order to ensure prompt processing, a higher pH value is preferable. For example, the pH value is usually 8.5 to 13.0, preferably
8.7 to 13.0, particularly preferably 9.5 to 12.0, are suitable. The processing time with the alkaline aqueous solution usually varies depending on the processing temperature. Usually, processing time is 1 minute to
24 hours, preferably 15 minutes to 1 hour.

The treatment temperature is usually 0 to 10 ° C, preferably 0 to 5 ° C. When the treatment temperature is lower than 0 ° C., the raw sea urchin or its ovaries are less likely to be contaminated by various bacteria and the ovaries are prevented from deteriorating, but the treatment time becomes longer. On the other hand, when the processing temperature exceeds 10 ° C.,
Ovarian metamorphosis or deterioration is accelerated, and there is a problem that the body easily loses its body and generates odor. In addition, in the alkaline aqueous solution,
If necessary, for example, a saccharide or a salt (for example, sodium chloride or the like) may be blended to improve the permeability of the alkaline aqueous solution into the material. Various saccharides can be used as the saccharide used, and examples thereof include reduced maltose, sorbitol, and sucrose.

[0014] The sea urchin or its ovary thus treated with alkali is preferably immediately or after any additional treatment, and then the aqueous alkaline solution attached to the sea urchin or its ovary is washed with water, or Neutralize. The washing time is
It varies depending on the time or degree of the alkali treatment, but usually 1 minute to 24 hours, preferably 30 minutes to 3 hours. Washing can be performed with tap water, or with salt water, for example, 1 to 6%, preferably 1 to 4%. In the latter case, the ovaries are tightened,
This is preferable because the elasticity and the volume feeling are further increased.
The neutralization treatment can be performed, for example, by spraying an acidic solution on the raw sea urchin or its ovary, or by immersing it in an acidic solution.

As the acidic solution, for example, an aqueous solution of an inorganic acid such as hydrochloric acid, sulfuric acid or nitric acid, or an organic acid such as acetic acid, sulfonic acid or citric acid can be used. Preferred acids are, for example, acetic acid and citric acid. When spraying, the pH is usually 4.0 to 6.6, preferably,
5.0 to 6.5. The pH of the acidic solution for immersion is, for example, 4.0 to 6.8, preferably 5.5 to 6.5. Neutralization may be performed as acidic in salt water. In this case, the salt water concentration is, for example, 1 to 10% by mass,
Preferably, 3 to 8% by mass is suitable. The neutralization temperature is
For example, a range of about 5 to 15 ° C. is preferable.

The neutralization time can vary depending on the alkali treatment time, but is usually 10 minutes to 2 hours, preferably 3 minutes.
0 minutes to 1 hour is appropriate. It may be weakly acidic as measured by the pH of water on the body surface of the neutralized sea urchin or its ovaries. In the present invention, the sea urchins thus washed or neutralized are ovaries taken out or removed by an ordinary method. Removed or removed ovaries, or
The treated raw sea urchin ovary is sold as it is or after seasoning with a seasoning, etc., from a factory or the like, through a wholesale store, or directly at a retail store such as a supermarket.

[0017]

The present invention will be described in more detail with reference to the following examples. Example 1 A composition for an alkaline treatment solution having the following composition was prepared and dissolved in water to prepare an aqueous alkali solution having a calcium oxide (alkali agent) concentration of 0.5% by mass. Sodium acetate (buffering agent) 38% Calcium oxide (alkali agent) 30% Glucose (penetrating agent) 32% Immediately after the sea urchin is caught, it is immersed in the obtained alkaline aqueous solution for 1 hour and then washed with water for 30 minutes Then, the ovary was taken out by breaking the shell of the sea urchin, and the change in color and elasticity of the ovary with time were observed at room temperature (8 to 15 ° C.) based on the time when the ovary was taken out. The results are as follows.

Immediately after taking out the ovary (1) Color change It had a yellow color peculiar to fresh sea urchin. (2) Characteristics of ovary The ovary was elastic and had a voluminous feel. (3) Odor There was no odor.

24 hours after removal of the ovaries (1) Color change The yellow color characteristic of almost fresh sea urchin was maintained. (2) Characteristics of ovary The ovary had elasticity and maintained a voluminous feeling in the ovary itself. (3) Odor There was no odor.

Forty-eight hours after the removal of the ovaries, (1) the color change slightly changed to brown, but this was not a problem. (2) Characteristics of ovaries The elasticity and the voluminous feeling began to decrease, but they were to the extent that there was no problem. (3) Odor There was almost no odor.

COMPARATIVE EXAMPLE 1 The sea urchin immediately after its capture was not subjected to an alkali aqueous solution treatment and a water washing treatment, but its shell was cracked and an ovary was taken out. Observation and evaluation were performed based on the time when the sample was taken out. The results are shown below.

Immediately after removing the ovaries (1) Color change It had a yellow color unique to almost fresh sea urchins. (2) Characteristics of ovaries The elasticity and the feeling of volume were not so much felt as compared with those obtained in Example 1. (3) Odor There was no odor.

24 hours after removing the ovaries (1) Color change Browning was rapidly progressing. (2) Characteristics of ovaries The elasticity and voluminous feeling were significantly reduced. (3) Odor Smell began to be generated.

48 hours after removal of the ovaries (1) Color change A large browning was observed. (2) Characteristics of ovaries The elasticity and voluminous feeling were significantly reduced. (3) Smell The smell became very large.

From the above results, it can be seen that in Comparative Example 1, at room temperature or so, at most 24 hours is the limit of the expiration period. On the other hand, in Example 1, it can be seen that the shelf life can be provided for at least 48 hours or more at about room temperature. In particular, it was found that the elasticity and voluminousness of the ovary of the sea urchin of Example 1 were significantly improved by performing the treatment of the present invention. Such an effect was unexpected.

Example 2 The sea urchin shell immediately after being captured was broken, the ovaries were taken out, and then, using the aqueous alkali solution used in Example 1, the ovaries of the sea urchin were placed in one liter of an alkaline aqueous solution for 1 hour. After immersion, it was washed with water for 30 minutes. Next, the color change of the ovary and the change over time in elasticity were observed and evaluated at room temperature (8 to 15 ° C.) with the ovary taken out as a base point. Comparative Example 2 After the sea urchin shell was cracked immediately after being captured and the ovary was taken out, the color change and the elasticity of the ovary over time were taken out without performing the alkaline aqueous solution treatment and the water washing treatment. Observation and evaluation were performed with the base point. The results of Example 2 and Comparative Example 2 were almost the same as those of Example 1 and Comparative Example 1. However, it is considered that the sea urchin itself subjected to the treatment of the present invention has better ovarian elasticity and volume.

According to the present invention, a raw sea urchin product having a greatly extended shelf life can be obtained. In addition, the raw sea urchin ovary treated according to the present invention has greatly improved ovarian elasticity and voluminous feel as compared with those not subjected to such treatment. Further, the sea urchin product obtained by the present invention may be used as it is, or may be subjected to salt water treatment, salt storage, or the like, and may be further seasoned with soy sauce flavor, miso flavor, or the like. Further, a combination with a small fish or the like may be used. For example, the grain sea urchin is a raw sea urchin ovary, for example, 100% salt water,
It is obtained by immersion at a low temperature of about 2 ° C. In addition, salted sea urchins are lined with raw ovaries,
It is obtained by providing a layer of salt from both sides of the arranged ovaries, dehydrating the ovaries, and increasing umami.
The ovaries of the raw sea urchin of the present invention are suitable not only for such salt water and salt storage treatments, but also for various treatments.

Claims (4)

[Claims] The present invention is characterized in that after the sea urchin is treated with an alkaline aqueous solution while the sea urchin is alive, the alkaline aqueous solution attached to the obtained sea urchin is washed or neutralized, and then the ovaries are taken out from the obtained sea urchin. A method for producing a raw sea urchin product. 2. After the sea urchin is treated with an aqueous alkali solution while being alive, the obtained aqueous alkali solution is washed or neutralized, and then the ovaries are removed from the obtained sea urchin. A sea urchin raw product characterized by being produced. 3. An ovary obtained by removing an ovary from a sea urchin, treating the obtained ovary with an alkaline aqueous solution, and then washing or neutralizing the alkaline aqueous solution attached to the treated ovary. How to make a product. 4. After the ovaries are taken out of the sea urchin, the obtained ovaries are treated with an aqueous alkaline solution, and then the alkaline aqueous solution attached to the treated ovaries is washed or neutralized. And sea urchin raw products.