JP5608450B2 - Method for producing germinated barley - Google Patents

Description

The present invention relates to a method for producing germinated barley that is rich in γ-aminobutyric acid (GABA).

Barley is rich in vitamins and dietary fiber, so it has been mixed with white rice. In recent years, it has been found that germinated barley from which barley is germinated is rich in γ-aminobutyric acid (GABA). GABA is a kind of amino acid and is attracting attention for its effects such as suppression of hypertension and mental stability. It is also expected to have effects such as improvement of blood flow in the brain (for example, prevention of stroke, etc.), activation of kidney / liver function, promotion of alcohol metabolism, deodorization, suppression of colorectal cancer and the like.

In barley, when the dormant state is broken by the addition of water, the hormone secreted from the embryo activates the saccharifying enzyme in the glue layer that exists in a thin film between the cocoon and the endosperm, and the starch content of the endosperm It is saccharified into maltose and germinated as nutrients.
Thus, since a paste layer is required for germinating barley, germinated barley is usually produced by germinating barley with cocoons (hulls) attached, and removing the hulls after germination by a pearling process. (For example, Patent Document 1).

JP 2006-296247 A

Unlike barley, rice is strongly bound to the endosperm, unlike rice, so it is common to grind the outer skin using a rotating whetstone in the wheat polishing process. However, germinated barley is decomposed by saccharification of the endosperm. Since the endosperm becomes brittle compared to before germination, the germinated barley is easily broken in the pearling process.
As a result, germinated barley that was crushed to a size smaller than the predetermined size was selected and removed in the selection process, resulting in a low yield as a finished product, a poor appearance, and a loss of texture. .

Therefore, an object of the present invention is to realize a method for producing germinated barley that can improve the yield of germinated barley.

In order to achieve the above object, according to the first aspect of the present invention, in the invention according to claim 1, 5 to 25% by weight is ground and removed from the barley surface mainly from the outer skin by using the barley apparatus to expose part of the endosperm Technical means comprising: a first wheat process, a germination process for germinating barley that has undergone the first wheat process, and a second wheat process that removes the remaining hull of the barley germinated by the germination process. Use.

According to the first aspect of the invention, after removing the barley from the barley from the appropriate amount of a sufficient amount of the barley necessary for germination in the first pearling step and germinating in the germination step, In the second wheat polishing step, the remaining hull can be sufficiently removed. Since a part of the outer skin is removed in the first wheat polishing step S1, the outer skin can be easily peeled off, so that the force applied to the brown wheat in the second wheat polishing step can be reduced, and the endosperm is crushed. Since it becomes difficult, the yield of germinated barley can be improved.

According to a second aspect of the present invention, in the method for producing a germinated barley according to the first aspect, the method further includes a step of heating and compressing the germinated barley that has undergone the second pearled step to a predetermined thickness. Use means.

As in the invention described in claim 2, the germinated barley can be used as germinated pressed barley by further comprising a step of heating and compressing the germinated barley that has undergone the second wheat polishing process to a predetermined thickness. According to this, the texture when mixed with white rice and eaten can be improved.

It is explanatory drawing which shows the manufacturing process of the germinated barley of this invention. It is explanatory drawing which shows the relationship between a weight decreasing rate and a germination rate. It is explanatory drawing which shows the change of the external appearance by the degree of pearling in the 1st pearling process. It is explanatory drawing which compared the barley which passed through the manufacturing process of the germinated barley of this invention with the external appearance of the barley which passed through the conventional manufacturing process.

The method for producing the germinated barley of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment.

As shown in FIG. 1, the germinated barley is produced through a first wheat process S1, a germination process S2, a second wheat process S3, and a selection process S4.

First, in the first wheat polishing step S1, a predetermined amount of barley as a raw material is prepared, and a part of the outer skin is removed by the wheat polishing equipment. As the barley equipment, publicly known barley equipment can be used, for example, a horizontal type barley machine with strong polishing power is used.
In the first wheat polishing step S1, conditions are set so that the degree of wheat polishing is removed from the surface of germinated barley by 5 to 25% by weight mainly from the outer skin. Thereby, a part of the outer skin is removed and a part of the endosperm is exposed, and barley in a state where a sufficient amount of paste powder layer necessary for germination is secured is obtained.

If the removal amount mainly composed of the outer skin is less than 5%, it becomes difficult to peel the outer skin in the second wheat process described later, so that a large grinding force must be applied, and the endosperm is easily crushed. Moreover, when the removal amount exceeds 25%, the amount of the paste powder layer is insufficient, and the germination rate in the germination step S2 described later is lowered.

The first wheat polishing step S1 may be performed as a single wheat operation, or may be removed so as to gradually scrape the outer skin by a plurality of wheat operations.
According to this, since the force loaded on the barley can be reduced, it is possible to further prevent the barley from being crushed in the first wheat polishing step S1.

In the subsequent germination step S2, the barley from which a part of the outer skin has been removed in the first wheat polishing step S1 is germinated. As this step, a normal barley germination step can be employed. For example, after sufficient moisture is contained, the mixture is held at 7 ° C. for several hours, and after breaking the dormancy, the germination is performed by holding at 15 ° C. for 4 days. be able to.

In the subsequent second wheat polishing step S3, the remaining hull of the barley germinated through the germination step S2 is sufficiently removed (for example, 95% or more). Here, the germinated barley has the endosperm fragile due to saccharification, but since the outer skin is partially removed in the first pearling step S1, the outer skin can be easily peeled off. Thereby, since the force loaded on brown barley can be made small, since endosperm becomes difficult to be crushed, the yield of germinated barley can be improved.

In the second wheat polishing step S3, it is preferable to perform grinding under the wheat polishing conditions where the grinding force is smaller than that in the first wheat polishing step S1 so as not to apply an excessive force to the endosperm. As the wheat polishing equipment, for example, a vertical wheat polishing machine capable of grinding under conditions where the polishing power is weaker than that of a horizontal wheat polishing machine can be used.

The second wheat polishing step S3 may be performed as a single wheat operation, or may be removed so as to gradually scrape the outer shell by a plurality of wheat operations.
According to this, since the force applied to the endosperm can be reduced, it is possible to further prevent the endosperm from being crushed in the second wheat polishing step S3.

Then, only barley having a predetermined size or more is selected in the selection process S4, and germinated oats larger than a predetermined size are used as a finished product.

In the production process of the germinated barley described above, a part of the barley's outer skin is secured in the first pearled wheat process S1 by securing a sufficient amount of the paste powder layer necessary for germination, and an appropriate amount is removed and germinated in the germination process S2. After that, the remaining hull is sufficiently removed in the second pearled step S3. Since a part of the outer skin is removed in the first wheat polishing step S1, the outer skin can be easily peeled off, so that the force applied to the genus bud can be reduced, and the endosperm is less likely to be crushed. The yield of germinated barley can be improved.

(Example of change)
It is also possible to adjust the amount of water so as to include moisture in the germinated barley from which the outer skin has been removed, and to allow the moisture to uniformly penetrate into the germinated barley, and then to heat and compress it to form oats. According to this, the texture when mixed with white rice and eaten can be improved.

Example 1
The change of the barley weight and the surface state was examined by changing the degree of the barley in the first barley process.
A horizontal type barley machine is a device which cuts barley from the outside by rotation of a grindstone, and this horizontal type barley machine is called a long stroke. The scouring process by a long process is performed 1 to 4 times, and the weight loss is shown in Table 1.
As shown in Table 1, the weight loss increases as the number of wheat operations increases. As shown in FIG. 3, it can be seen that the outer skin is removed, the weight is reduced, and the area where the endosperm is exposed is increased with the increase in the number of operations of the barley.

Next, the germination test of the barley which passed through the 1st wheat process was done, and the relationship between the weight loss in the 1st wheat process and the germination rate was investigated. In the germination test, sufficient moisture can be contained, held at 7 ° C. for several hours, and after breaking dormancy, germination can be performed by holding at 15 ° C. for 4 days. As shown in FIG. 2, the germination rate decreased as the weight loss increased, but the germination rate showed a high value of 85% even when the weight loss was 23%.

(Example 2)
The yield of germinated barley produced by the production method of the present invention was compared with the germinated barley produced by the conventional production method.
For the barley of Example 1, germinated oats were prepared, and the yield of barley of a predetermined size or more was compared with the yield of germinated oats by a conventional method. Here, the predetermined dimension is a dimension that remains in a screen of 8 mesh (within 1 inch).
In the present Example, the 1st wheat polishing process was made into the wheat polishing process by a horizontal type wheat mill.
In the conventional production method, the amount of crushed barley was large and the yield was about 19%, whereas in the method of the present invention, the amount of crushed barley was greatly reduced and the yield was 61%. .
From the above, it was confirmed that the yield can be improved while maintaining a high germination rate.
Moreover, as shown in FIG. 4, in the conventional manufacturing method, even if it was more than a predetermined dimension, there were many broken barleys, but in the method of this invention, most barleys kept the original form. . Thereby, the external appearance was improved and the texture could be improved.

(Example 3)
The content of GABA in the germinated barley produced by the production method of the present invention was compared with the germinated barley produced by the conventional production method. Germination conditions are: germination condition A for 5 days after breaking a predetermined dormancy break, holding at 7 ° C. for 5 days, and then holding for 15 days at 15 ° C. B was adopted.
The GABA content was measured by a known amino acid analysis method. As shown in Table 2, the content of GABA in the germinated barley produced by the production method of the present invention was equal to or greater than that of the germinated barley produced by the conventional production method in both germination conditions A and B. Thereby, it was confirmed that germinating barley containing a large amount of GABA can be produced.

[Effect of the embodiment]
According to the production process of the germinated barley of the present invention, a sufficient amount of the paste layer necessary for germination is secured in a part of the outer barley of the barley in the first wheat refinement process S1, and an appropriate amount is removed, and the germination process S2 After germination in step 2, the remaining hull is sufficiently removed in the second pearled step S3. Since a part of the outer skin is removed in the first wheat polishing step S1, the outer skin can be easily peeled off, so that the force applied to the brown wheat can be reduced and the endosperm is less likely to be crushed. The yield of barley can be improved.

S1 ... 1st wheat process S2 ... Germination process S3 ... 2nd wheat process

Claims (2)

A first wheat polishing step in which 5 to 25% by weight is ground and removed from the surface of barley by the barley apparatus to expose a part of the endosperm,
Germination step of germinating barley that has undergone the first pearled step;
A second wheat polishing step for removing the remaining hull of the barley germinated by the germination step;
A method for producing germinated barley, comprising: The method for producing germinated barley according to claim 1, further comprising a step of heating and compressing the germinated barley that has undergone the second pearled step to a predetermined thickness.

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