JPH04356156A - Production of processed shellfish - Google Patents

Abstract

PURPOSE:To produce a processed shellfish having its contents in a substantially raw state by simple operations, by applying a high pressure to a raw shellfish with a shell and subsequently opening the shell. CONSTITUTION:A raw shellfish with a shell such as an oyster, calm or short- necked calm and sea water are sealed with a plastic container and subsequently subjected to a high pressure of 1-44 atmospheres. The shell of the treated shellfish is easily opened to provide the objective processed shellfish.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel method for producing processed shellfish.

0002

2. Description of the Related Art It has been well known that it is quite difficult to open the shell of raw shellfish such as oysters.

0003

[Problem to be solved by the invention] In other words, not only does it take a considerable amount of force to open the shell of a raw shellfish, but it also requires a lot of effort in normal work, as the shell will break if the person is not a skilled person. Requires skill. Therefore, it would be of great operational benefit if raw shells could be opened easily, more specifically, simply by hand. Therefore, an object of the present invention is to provide a method for manufacturing processed shellfish in which raw shells can be easily opened by hand.

0004

[Means for Solving the Problems] As a result of intensive research, the present inventors have found that the above object can be achieved by utilizing high pressure processing means, and have completed the present invention. The present invention provides a method for producing processed shellfish, which is characterized by applying high pressure to raw shellfish with shells.

The present invention will be explained in detail below. In the present invention, raw shellfish with shells refers to shellfishes that are still alive with their shells still attached. Although not limited by the type of shellfish, representative examples include oysters, clams, and clams.

According to the method of the present invention, high pressure is applied to such raw shellfish with shells. Here, "high pressure" generally refers to a pressure 1,000 times or more higher than atmospheric pressure. Practically 1
~4,000 atmospheres (1 atmosphere is about 1 kg/cm2) may be sufficient. Furthermore, "applying high pressure" refers to holding raw shellfish with shells under such atmospheric pressure for a certain period of time. Specifically 2
3 to 10 minutes for 1,000 atmospheres, 0.5 minutes for 3,000 atmospheres
~5 minutes, and in the case of 4,000 atmospheres, approximately 0.5 to 3 minutes may be used as a guide. If the retention time is too short, it will be difficult to achieve the intended purpose of the present invention, and if the retention time is too long,
After the above-mentioned holding time, the shell is already easily opened by hand, which is not only uneconomical, but also tends to cause the protein components of the shellfish to deteriorate easily.

The method of applying high pressure is not particularly limited, but in reality, for example, raw shellfish with shells are stored in a plastic container together with seawater, sealed, and then placed in a high-pressure processing device (for example, MCT-150 type manufactured by Mitsubishi Heavy Industries, Ltd.)
, and apply a predetermined high pressure.

Processed shellfish produced by the method of the present invention as described above can be easily opened by hand, and is therefore much easier to work with than conventional shell openings.

[0009]

[Effect] When high pressure is applied to a raw shellfish with a shell attached, the muscles in the scallop part are probably affected in some way, making it difficult to close the shell, making it difficult to open the shell by hand. It is thought that it may be possible to do so.

0010

EXAMPLES The present invention will be explained in more detail below with reference to Examples and Test Examples. Example 1 Two raw oysters with shells were placed in a plastic bag with approximately the same volume of seawater, and after sealing, the bag was placed in a high-pressure processing device MCT-150 manufactured by Mitsubishi Heavy Industries, Ltd. and heated to 3,000 atmospheres. Processed oysters of the present invention were produced by applying high pressure for 3 minutes.

Example 2 Four raw clams with shells were placed in a plastic bag with approximately the same volume of seawater, sealed, and then placed in the high-pressure processing equipment used in Example 1 above and heated at 4,000 atmospheres. Processed clams of the present invention were produced by applying high pressure for 2 minutes.

Test Example A comparative test was conducted on the degree of opening of the shells by hand between the processed oysters of the present invention obtained in Example 1 and, as a control, raw oysters with shells that had not been subjected to high-pressure treatment. However, the results were as follows. Note 1: ○ means that the shell of the shellfish can be easily opened by human hands, × means that the shell of the shellfish cannot be opened easily by human hands. 2: When the shells of the processed oysters of the present invention were opened, they were found to be in substantially the same condition as raw oysters.

[0013]

Effects of the Invention The method of the present invention provides processed shellfish whose shells are extremely easy to open and whose flesh remains substantially raw.

Claims (1)

[Claims] 1. A method for producing processed shellfish, which comprises applying high pressure to raw shellfish with shells.