KR102463105B1 - Manufacturing method of potato bread using starch cultured solid yeast - Google Patents

Abstract

The present invention relates to a manufacturing method of a potato bread using starch cultured solid yeast. According to the present invention, a manufacturing method of a potato bread using starch cultured solid yeast uses the saccharomyces cerevisiae LE PAIN2021-1 strain (accession number KCTC 14504BP) with reduced off-flavor, and the unique off-odor of yeast is reduced to feel the unique taste and aroma of potatoes, and the potato bread with a softer texture can be produced by excellent fermentation expansion.

Description

Potato bread manufacturing method using starch cultured solid yeast {MANUFACTURING METHOD OF POTATO BREAD USING STARCH CULTURED SOLID YEAST}

The present invention relates to a method for producing potato bread using starch-cultured solid yeast.

Bread is widely consumed as a simple meal replacement for modern people, but it is true that it has many calories and much less nutrients than wheat flour dough rice bread. Bread is a food made by kneading wheat flour containing salt, sugar, oil, baking powder or yeast, fermenting it, and then baking or steaming it. With the development, various breads that contain a large amount of the taste and nutrients of the bread are also being developed.

As industry develops and dietary life improves, food culture develops, and accordingly, an atmosphere is created to eat food that is beneficial not only for taste but also for health. However, there is a problem that goes against the flow of the times because there are many cases where high-carbohydrate diets such as bread increase due to the westernization of dietary life, which negatively affects blood pressure or blood sugar.

In addition, due to the development of such bread technology, the number of people using bread as a meal substitute, which can be easily consumed without distinguishing between East and West, while providing a feeling of satiety and nutrients, is rapidly increasing.

Republic of Korea Patent Publication No. 10-2014-0154817

An object of the present invention is to provide a method for producing potato bread using starch cultured solid yeast.

According to an embodiment of the present invention, 1) mixing flour, sugar, salt, starch cultured solid yeast, mashed potatoes, milk and water at 100 ~ 150rpm; 2) mixing at 200 to 280 rpm, and mixing at 280 to 380 rpm; 3) adding olive oil while mixing at 100 to 150 rpm; 4) mixing at 200 to 280 rpm, and mixing at 280 to 380 rpm; 5) adding potato dice while mixing at 100 ~ 150rpm; 6) primary fermentation of the dough at room temperature; 7) dividing the dough into 130 ~ 170g and secondary fermentation at 34℃; 8) Applying olive oil to the dough, and provides a method for producing potato bread comprising the step of baking in an oven.

The starch cultured solid yeast is characterized in that it was prepared by culturing the Saccharomyces cerevisiae LE PAIN2021-1 strain deposited under the accession number KCTC 14504BP in starch dough granules having a size of 20 to 60 mesh.

The strain is characterized in that it comprises the 18s rRNA sequence of [SEQ ID NO: 1].

The strain is characterized in that the isobutyric acid content in the cells after 20 hours of culture is 100 ppm or less.

In step 1), 1000 g of flour, 20 g of sugar, 20 g of salt, 15 g of starch cultured solid yeast, 200 g of mashed potatoes, 200 g of milk, and 700 g of water are mixed in a mixing bowl and mixed at 125 rpm for 5 minutes. do.

The method for producing potato bread using the starch-cultured solid yeast of the present invention uses the Saccharomyces cerevisiae LE PAIN2021-1 strain (Accession No. KCTC 14504BP) with reduced off-flavor, and the unique off-flavor of yeast is reduced This makes it possible to feel the unique taste and aroma of the ingredients, and to produce potato bread with a softer texture due to its excellent fermenting expansion power.

1 is a view showing the phylogenetic tree of the Saccharomyces cerevisiae LE PAIN2021-1 strain (Accession No. KCTC 14504BP) of the present invention.

In the present specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

According to one embodiment of the present invention, there is provided a method for producing potato bread using the starch cultured solid yeast of the present invention.

The present inventors have disclosed a solid medium composition comprising a dough in a previous patent application. However, in the case of the dough, there was a disadvantage in that the yeast was not properly cultured because the flour hardened during the sterilization process for use as a medium. However, in the case of starch, the present inventor confirmed that the state of the dough was maintained during the sterilization process, and a solid medium (for example, starch granules or starch dough granules) was used for culturing yeast to complete starch culture solid yeast, The related contents were applied for as a patent application number of No. 10-2022-0000810 as of January 04, 2022.

Starch is a natural polymer in which a plurality of α-glucose molecules are polymerized by glycosidic bonds. The starch is a starch granule or starch dough granule, and a dough is prepared by mixing starch powder and a liquid medium, and the dough is 20 to 60 mesh. It can be prepared by filtering through a sieve.

In addition, the liquid medium added when preparing the starch dough may further include a culture medium of a strain to be cultured in a solid medium (eg, starch granules or starch dough granules). According to the present inventor's experiment, when the strain to be cultured in the liquid medium is cultured in the liquid medium and then included in the liquid medium, compared to using a pure liquid medium when preparing starch dough, it can be confirmed that the strain is cultured better. there was. The culture medium of the strain may contain 1 to 99% by weight, preferably 1 to 50% by weight, more preferably 1 to 30% by weight relative to the total weight of the liquid medium.

Therefore, the starch granules are used as structures and carriers for yeast to grow, and in the case of starch, it is edible, so there is no need to separate the medium and yeast after the yeast is cultured in the solid medium. Yeast containing a solid medium It has the advantage of being able to use itself.

The starch may be any one of sweet potato starch, potato starch, corn starch, tapioca starch, wheat starch, and mixtures thereof, but is not limited thereto.

When preparing the starch dough, the liquid medium may be mixed in an amount of 10 to 90% by weight based on the total weight of the starch. Most preferably, it may be added in an amount of 30 to 60% by weight based on the total weight of the starch. When the liquid medium is added in less than 30% by weight or in excess of 60% by weight, the Jeonbuk dough becomes too hard or soft, making granulation difficult, and there is a disadvantage that it cannot provide an environment in which yeast can be cultured. Preferably, the moisture content of the starch dough is 60 to 80%.

The liquid medium may further include a carbon source, a nitrogen source, an inorganic salt or a growth factor, but is not limited thereto.

The starch dough may be used for culturing yeast by spraying liquid cultured yeast.

A typical yeast manufacturing process consists of seed culture - raw material preparation - main culture - centrifugation - washing - dehydration - drying. The yeast manufacturing process is a step in which the division and death of yeast occur at the same rate in the state of the stationary phase in the main culture step. Therefore, dead yeast or unhealthy yeast gives off a musty smell.

When the yeast culture solution of the main culturing step is diluted with a liquid medium and evenly sprayed on the starch dough, the sprayed yeast can be re-cultivated in the starch dough, so that only healthy yeast can be used in the production of raw yeast during the cultivation process. At the same time, since the drying process can be performed in the culturing process, the (centrifugation-washing-dehydration) process can be omitted, thereby reducing the manufacturing cost of live yeast.

The carbon source may be one or more selected from the group consisting of glucose, lactose, fructose, molasses, maltose and sugar, but is not limited thereto.

The nitrogen source is an organic nitrogen source, beef extract, yeast extract, peptone, malt extract, tryptone, soybean meal, corn steep liquor ); The inorganic nitrogen source may be at least one selected from the group consisting of NaNO ₂ , KNO ₃ , NH ₄ Cl, (NH ₄ ) ₂ SO ₄ , (NH ₄ ) ₂ HPO ₄ and urea, but is not limited thereto.

The inorganic salts are copper sulfate (CuSO ₄ ), magnesium sulfate (MgSO ₄ ), sodium chloride (NaCl), potassium chloride (KCl), potassium monohydrogen phosphate (K ₂ HPO ₄ ), potassium dihydrogen phosphate (KH ₂ PO ₄ ), sulfuric acid Potassium (K ₂ SO ₄ ), zinc sulfate (ZnSO ₄ ), calcium chloride (CaCl ₂ ) and iron chloride (FeCl ₂ (II)) may be at least one selected from the group consisting of, but is not limited thereto.

The growth factor may be at least one selected from the group consisting of nicotinic acid, biotin, inositol, thiamine hydrochloride (thiamine HCl), folic acid and ascorbic acid. However, it is not limited thereto.

The starch dough is Saccharomyces cerevisiae ( Saccharomyces cerevisiase ), Saccharomyces carlsbergensis ( Saccharomyces carlsbergensis ), Lactobacillus curvatus ( Lactobacillus curvatus ), Lactobacillus plantarum ( Lactobacillus plantarum ), Lactobacillus brevis ), Lactobacillus helveticus ( Lactobacillus helveticus ) It is possible to culture one or more microorganisms selected from the group consisting of, but is not limited thereto.

The starch cultured solid yeast may be produced by a manufacturing method comprising spraying a yeast culture solution on the starch granules or starch dough granules.

The yeast culture medium is a microorganism, preferably a yeast culture with shaking, and the number of viable cells in the sprayed yeast culture medium may be 10 ⁷ to 10 ¹⁰ CFU, but is not limited thereto. The sprayed yeast culture solution may have a pH of 4.0 to 5.0, preferably a pH of 4.0 to 4.5.

In another embodiment, the yeast culture solution may be the strain culture solution itself, but may be a strain solution prepared by precipitating the cultured yeast, removing the supernatant, and suspending it in distilled water.

The strain solution may also have a pH of 4.0 to 5.0, preferably a pH of 4.0 to 4.5, like the yeast culture.

Adjusting the pH of the yeast culture solution or the strain solution to 4.0 ~ 5.0 is to prevent other strains from growing through the pH control because a separate sterilization process is not performed when preparing the starch dough. According to the present inventor's experiment, after the starch dough was prepared and sterilized through an autoclave, the starch dough became thin and agglomerated with each other, and granules could not be formed.

Specifically, the method for preparing a starch-cultured solid yeast comprises the steps of culturing the yeast as a seed; culturing the seed cultured yeast for a sufficient time; spraying the yeast culture solution on a solid medium (eg, starch granules or starch dough granules); It may include the step of culturing yeast in the solid medium, and the cultured yeast is dried in a cultured state in the solid medium, so that it can be commercialized together with packaging.

The sprayed yeast culture solution may be sprayed in an amount of 1 to 20% by weight, preferably 5 to 15% by weight, and most preferably 10% by weight relative to the total weight of the solid medium, but is not limited thereto.

In the step of culturing the yeast, the culturing time may be 1 to 4 days. The incubation time is preferably performed until the moisture content of the solid medium becomes 50% or less. According to the present inventor's experiment, in the case of culturing for 2-3 days in the recultivation step, it was confirmed that the water content was 50% or less and the number of viable cells was cultured to 1 x 10 ¹⁰ CFU or more, thereby culturing to a level capable of commercialization.

In order to commercialize yeast as live yeast, the number of viable cells must be 1 x 10 ¹⁰ CFU or more, and the moisture content must be 50% or less.

However, when the solid medium of the present invention is used, only healthy yeast remains in the culturing step without going through a separate drying process, and the drying process can be performed at the same time, so the above (centrifugation-washing-dehydration) process is omitted. Therefore, it is possible to reduce the cost of culturing and manufacturing yeast.

Therefore, in the case of culturing yeast using the solid medium of the present invention, the formulation for commercialization can be performed immediately after the culturing step, so the process is significantly simpler than the existing live yeast manufacturing method, and thus the live yeast can reduce the manufacturing cost of

According to the experimental results of the present inventor, it can be seen that yeast is re-cultured in the solid medium of the present invention, and only healthy yeast remains by this culturing step, and finally, live yeast can be produced only with healthy yeast. .

The yeast may be Saccharomyces cerevisiae LE PAIN2021-1 strain (Accession No. KCTC 14504BP), but is not limited thereto.

The Saccharomyces cerevisiae LE PAIN2021-1 strain (Accession No. KCTC 14504BP) used in the present invention is a strain with a reduced odor peculiar to yeast compared to commercialized baker's yeast. Bread with excellent flavor and texture can be produced because it exhibits a fermenting power similar to that of baked baker's yeast.

The strain is a novel Saccharomyces cerevisiae strain isolated from whole wheat by the present inventors, and as a result of identification, it belongs to the Saccharomyces cerevisiae strain, and the present invention belongs to the Saccharomyces cerevisiae strain. It was named as Saccharomyces cerevisiae LE PAIN2021-1 and deposited with the Korea Research Institute of Bioscience and Biotechnology on March 22, 2021, and was given an accession number as KCTC 14504BP.

The strain contains the 18s rRNA sequence of [SEQ ID NO: 1].

The strain exhibits a reduced effect of yeast-specific odor compared to commercially available yeast. According to the inventor's experiment, as a result of measuring the isobutyric acid content after culturing the strain for 20 hours, the present invention Saccharomyces cerevisiae LE PAIN2021-1 strain has an isobutyric acid content compared to commercialized baker's yeast I could see that this was very little. The strain is characterized in that the isobutyric acid content in the cells after 20 hours of culture is 100 ppm or less.

The yeast cultured in the solid medium may be yeast for baking, but is not limited thereto, and the yeast cultured in the solid medium is characterized in that the odor is reduced compared to commercial yeast.

Since the yeast has a very low content of isobutyric acid, it is possible to increase the inherent taste and flavor of the bread material because it has less odor peculiar to yeast compared to general commercialized yeast.

Therefore, after preparing starch-cultured solid yeast using the yeast, when it is used for bread production, the characteristic odor of yeast is reduced, so that the inherent taste and flavor of the material can be felt, and a softer texture due to excellent fermentation expansion power of potato bread can be made.

Specifically, the potato bread manufacturing method of the present invention comprises the steps of 1) mixing flour, sugar, salt, starch cultured solid yeast, mashed potatoes, milk and water at 100 to 150 rpm; 2) mixing at 200 to 280 rpm, and mixing at 280 to 380 rpm; 3) adding olive oil while mixing at 100 to 150 rpm; 4) mixing at 200 to 280 rpm, and mixing at 280 to 380 rpm; 5) adding potato dice while mixing at 100 ~ 150rpm; 6) primary fermentation of the dough at room temperature; 7) dividing the dough into 130 ~ 170g and fermenting the dough at 34°C for secondary fermentation, and 8) applying olive oil to the dough and baking it in an oven.

Step 1) is the raw material mixing step, where 900 ~ 1200 g of flour, 10 ~ 30 g of sugar, 10 ~ 30 g of salt, 10 ~ 20 g of starch cultured solid yeast, 100 ~ 300 g of mashed potatoes, 100 ~ 300 g of milk, and 500 ~ 600 g of water are mixed. , Preferably mix flour 1000g, sugar 20g, salt 20g, starch cultured solid yeast 15g, mashed potatoes 200g, milk 200g, water 700g. The raw materials are mixed and mixed at 100 to 150 rpm. Preferably mixing at 125 rpm.

Step 2) is the first mixing step, mixing at medium speed for 5 minutes, and then mixing at high speed for 2 minutes. Specifically, the medium speed may be 200 to 280 rpm, and the high speed may be 280 to 380 rpm.

Step 3) is the step of adding olive oil. When the dough is smooth and elastic by the mixing, the mixing speed is lowered to a low speed (100 ~ 150rpm), and olive oil is added. The olive oil is added in an amount of 50 to 150 g, preferably 100 g, and is added in two to three portions without adding immediately.

Step 4) is the second mixing step for mixing olive oil, and the mixing speed and time are the same as in step 2).

Step 5) is a step of adding dice potatoes, lowering the mixing speed to 100 to 150 rpm, adding 300 to 500 g of diced potatoes, and further mixing at 100 to 150 rpm for 1 minute.

Step 6) is a step of first fermenting the dough at room temperature, and the mixed dough may be fermented at room temperature for 20 to 40 minutes.

Step 7) is the second fermentation step. First, the dough is divided into 130 ~ 170g each and round, and secondarily fermented at 32 ~ 36℃ for 20 ~ 40 minutes. Preferably, the dough is divided into rounds by 150 g each, and secondarily fermented at 34° C. for 30 minutes.

Step 8) is a step of baking the dough in an oven. Apply olive oil to the fermented dough, and bake for 8 to 12 minutes in an oven with an upper temperature of 240 °C and a lower temperature of 220 °C.

<Example>

1. Isolation of strains

To isolate yeast strains, whole wheat was used as a separation source, and even if 5 g of whole wheat flour was added to 45 ml of sterilized YM liquid medium (0.3% yeast extract, 0.3% malt extract, 0.5% peptone, 1.0% glucose), It was incubated for a period of time.

Then, the microorganisms cultured in the YM liquid medium were buried in the YM solid medium, spread on the surface of the plate medium, and cultured at 30° C. for 72 hours to separate the grown colonies.

The single colony was cultured in 500 ml of sterilized YM liquid medium, and a sensory test was performed on 10 subjects, and a strain with a low yeast-specific odor was selected. It was identified as Saccharomyces cerevisiae .

The present inventor named the strain Saccharomyces cerevisiae LE PAIN2021-1 and deposited it on March 22, 2021 at the Korea Research Institute of Bioscience and Biotechnology (Accession No. KCTC 14504BP).

The 18s rRNA sequence of Saccharomyces cerevisiae LE PAIN2021-1 is as follows:

[SEQ ID NO: 1]

AGGTCCTCATGTCTAGTATAGCATTTATACAGTGAAACTGCGAATGGCTCATTAAATCAGTTATCGTTTATTTGATAGTTCCTTTACTACATGGTATAACTGTGGTAATTCTAGAGCTAATACATGCTTAAAATCTCGACCCTTTGGAAGAGATGTATTTATTAGATAAAAAATCAATGTCTTCGGACTCTTTGATGATTCATAATAACTTTTCGAATCGCATGGCCTTGTGCTGGCGATGGTTCATTCAAATTTCTGCCCTATCAACTTTCGATGGTAGGATAGTGGCCTACCATGGTTTCAACGGGTAACGGGGAATAAGGGTTCGATTCCGGAGAGGGAGCCTGAGAAACGGCTACCACATCCAAGGAAGGCAGCAGGCGCGCAAATTACCCAATCCTAATTCAGGGAGGTAGTGACAATAAATAACGATACAGGGCCCATTCGGGTCTTGTAATTGGAATGAGTACAATGTAAATACCTTAACGAGGAACAATTGGAGGGCAAGTCTGGTGCCAGCAGCCGCGGTAATTCCAGCTCCAATAGCGTATATTAAAGTTGTTGCAGTTAAAAAGCTCGTAGTTGAACTTTGGGCCCGGTTGGCCGGTCCGATTTTTTCGTGTACTGGATTTCCAACGGGGCCTTTCCTTCTGGCTAACCTTGAGTCCTTGTGGCTCTTGGCGAACCAGGACTTTTACTTTGAAAAAATTAGAGTGTTCAAAGCAGGCGTATTGCTCGAATATATTAGCATGGAATAATAGAATAGGACGTTTGGTTCTATTTTGTTGGTTTCTAGGACCATCGTAATGATTAATAGGGACGGTCGGGGGCATCAGTATTCAATTGTCAGAGGTGAAATTCTTGGATTTATTGAAGACTAACTACTGCGAAAGCATTTGCCAAGGACGTTTTCATTAATCAAGAACGAAAGTTAGGGGATCGAAGATGATCAGATACCGTCGTAGTCTTAACCATAAACTATGCCGACTAGGGATCGGGT GGTGTTTTTTTAATGACCCACTCGGCACCTTACGAGAAATCAAAGTCTTTGGGTTCTGGGGGGAGTATGGTCGCAAGGCTGAAACTTAAAGGAATTGACGGAAGGGCACCACCAGGAGTGGAGCCTGCGGCTTAATTTGACTCAACACGGGGAAACTCACCAGGTCCAGACACAATAAGGATTGACAGATTGAGAGCTCTTTCTTGATTTTGTGGGTGGTGGTGCATGGCCGTTCTTAGTTGGTGGAGTGATTTGTCTGCTTAATTGCGATAACGAACGAGACCTTAACCTACTAAATAGTGGTGCTAGCATTTGCTGGTTATCCACTTCTTAGAGGGACTATCGGTTTCAAGCCGATGGAAGTTTGAGGCAATAACAGGTCTGTGATGCCCTTAGACGTTCTGGGCCGCACGCGCGCTACACTGACGGAGCCAGCGAGTCTAACCTTGGCCGAGAGGTCTTGGTAATCTTGTGAAACTCCGTCGTGCTGGGGATAGAGCATTGTAATTATTGCTCTTCAACGAGGAATTCCTAGTAAGCGCAAGTCATCAGCTTGCGTTGATTACGTCCCTGCCCTTTGTACACACCGCCCGTCGCTAGTACCGATTGAATGGCTTAGTGAGGCCTCAGGATCTGCTTAGAGAAGGGGGCAACTCCATCTCAGAGCGGAGAATTTGGACAAACTTGGTCATTAGAGAACAAAAGTAGAAACCGC

2. LE PAIN2021-1 Yeast Culture Using Solid Medium Containing Starch Dough Granules

A YM liquid medium (Yeast Extract 3.0g, Malt Extract 3.0g, Peptone 5.0g, Dextrose 10.0g Per Liter) was prepared, and the prepared YM liquid medium was autoclaved at 121° C. at 1 atm (15 psi). Sterilize for 15 minutes.

Platinum in 50ml of YM liquid medium (Yeast Extract 3.0g, Malt Extract 3.0g, Peptone 5.0g, Dextrose 10.0g Per Liter) sterilized with the isolated strain Saccharomyces cerevisiae LE PAIN2021-1 After incubation using a shaking incubator at a temperature of 30 ℃, 200 rpm for 48 hours. When the number of viable cells reached 10 ⁸ to 10 ⁹ CFU, the culture solution was mixed in a new sterile YM liquid medium in a weight ratio of 9:1 to prepare a strain solution.

Add 30 g of YM strain mixed medium to 70 g of potato starch powder and knead. The starch dough is granulated using a sieve of 20 to 60 mesh.

100 g of the starch dough granules were spread on a plate, and 10 g of the strain solution was sprayed every 2 hours, and incubated for 48 to 72 hours at a temperature of 30° C. and oxygen conditions. The incubation was carried out until the moisture content of the starch solid medium became 50% or less.

3. Potato Bread

Put 1000g of flour, 20g of sugar, 20g of salt, 15g of starch cultured solid yeast, 200g of mashed potatoes, 200g of milk, and 700g of water in a mixing bowl and mix at 125rpm for 5 minutes. If the flour is not visible and the ingredients stand well, mix at 250 rpm for 5 minutes and at 350 rpm for 2 minutes. When the elastic dough is completed, lower it to 125rpm, add 100g of olive oil, mix again at 250rpm for 5 minutes, and mix at 350rpm for 3 minutes. After that, lower it to 125rpm again, add 400g of potato dice, and mix at 125rpm for 1 minute.

The dough is first fermented at room temperature for 40 minutes, and the dough is divided into 150 g each and rounded. Give it a rest for 5-10 minutes, and let the rested dough ferment for 40 minutes at 34℃. Apply olive oil to the fermented dough and bake it in an oven at 240℃ upper temperature and 220℃ lower temperature for 10 minutes.

<Comparative example>

In the above example, Saccharomyces cerevisiae ( Saccharomyces cerevisiae ) Instead of LE PAIN2021-1, a commercially available general baker's yeast was used, and the yeast was cultured in the same manner as in the above Example, and potato bread was prepared.

<Experimental example>

1. Evaluation of Saccharomyces cerevisiae culture ability of solid medium

Saccharomyces cerevisiae of the solid medium culturing ability evaluation was measured by the number of viable cells.

Take 10 g of the yeast solid medium cultured in Examples and Comparative Examples, add 90 mL of sterile water, dilute step by step, spread 20 μL of MRS broth agar medium, and then the number of viable cells after culturing for 24 hours in an incubator at 30 ° C. was expressed as colony forming unit (CFU)/ml.

Example comparative example Number of viable cells (CFU/ml) 3.2 x 10 ¹⁰ 1.8 x 10 ¹⁰

Referring to [Table 1], it can be seen that the yeast is best cultured in the solid medium of Examples.

In the case of the embodiment, the size of the starch dough granules is 20 to 60 mesh. In the case of this size of granules, oxygen supply is smooth through the pores between the granules, and it can be said that it provides an appropriate surface area for yeast to be cultured. According to an additional experiment by the present inventors, when the starch dough is granulated using a sieve of less than 20 mesh, it is 1.6 x 10 ⁸ CFU/ml, and when the starch dough is granulated using a sieve of more than 60 mesh, 1.5 x 10 It was confirmed that the yeast culturing ability was reduced when the size of the starch dough was out of 20 to 60 mesh at ⁷ CFU/ml.

2. Determination of isobutyric acid content

Substances that cause odor peculiar to yeast consist of various compounds, and although it is difficult to limit to one type of compound, isobutyric acid, known as a linear fatty acid having a putrefactive odor, is presumed to be one of the causative substances.

In order to measure the isobutyric acid content of yeast obtained from Saccharomyces cerevisiae LE PAIN2021-1 strain, 20 g of yeast solid medium cultured in Examples and Comparative Examples was transferred to YM liquid medium in a 500 ml Erlenmeyer flask. Incubated for 20 hours at 30 °C in 100ml, the culture medium was centrifuged at 3,000rpm for 5 minutes to remove the supernatant, and washed twice with distilled water.

Then, 20 ml of distilled water was added to the precipitated cells, and after ultrasonic pulverization, centrifugation at 10,000 rpm, 10 minutes, the isobutyric acid content of the supernatant was measured by gas chromatography, and commercially available baker's yeast (comparative example) The content of isobutyric acid was measured in the same manner as above.

Example comparative example Commercial Bakery Yeast Isobutyric acid content (ppm) 78 206 564

Referring to [Table 2], it can be seen that the Saccharomyces cerevisiae LE PAIN2021-1 strain exhibits a characteristic of reducing the characteristic odor of yeast. In addition, referring to the comparative example, it was confirmed that, when the commercialized baker's yeast was cultured in a starch solid medium, the characteristic that the commercialized baker's yeast also showed a reduction in off-flavor.

3. Sensory evaluation

For sensory evaluation of the prepared potato bread, 10 men and women (5 men / 5 women) were selected and evaluated with a 10-point preference scale method for smell (offense level), texture (softness), taste and overall preference. . The evaluation was very good 10 points, good 7 points, average 5 points, dislike 3 points, and dislike 1 point. In the case of odor, a low score was given to the subject group with off-flavor.

Example comparative example Commercial Bakery Yeast Odor (degree of odor) 9.26 ± 0.34 7.98 ± 1.22 7.18 ± 0.66 Texture (softness) 9.14 ± 1.25 7.88 ± 1.48 8.12 ± 1.52 taste 9.06 ± 0.66 8.26 ± 1.64 7.96 ± 1.24 full symbol 9.72 ± 1.22 8.14 ± 1.24 7.44 ± 0.84

Referring to [Table 3], it was confirmed that the potato bread prepared with the yeast of the example of the present invention had a reduced odor compared to other breads.

According to the inventor's experiment, it was confirmed that the fermentation expansion power of the dough prepared with the yeast of Example was superior to that of the dough prepared with other yeast. It was evaluated as excellent in the baked potato bread.

Therefore, in the case of the potato bread prepared with the yeast of Example, it was evaluated that the taste and overall preference were excellent compared to the potato bread prepared with other yeast. It is judged that the potato bread prepared with the yeast of Example was able to receive excellent evaluation in taste and overall preference because there is no yeast-specific odor and furthermore, the texture is excellent (soft) due to excellent fermentation and expansion power. In addition, it was confirmed that the taste and flavor of the potatoes contained in the potato bread were superior because there was no odor of special yeast.

Korea Institute of Bioscience and Biotechnology KCTC14504BP 20210322

<110> IM,, Tae Eon <120> MANUFACTURING METHOD OF POTATO BREAD USING STARCH CULTURED SOLID YEAST <130> Pn-2022-0086 <160> 1 <170> KoPatentIn 3.0 <210> 1 <211> 1715 <212> RNA <213> Saccharomyces cerevisiae <400> 1 aggtcctcat gtctagtata gcatttatac agtgaaactg cgaatggctc attaaatcag 60 ttatcgttta tttgatagtt cctttactac atggtataac tgtggtaatt ctagagctaa 120 tacatgctta aaatctcgac cctttggaag agatgtattt attagataaa aaatcaatgt 180 cttcggactc tttgatgatt cataataact tttcgaatcg catggccttg tgctggcgat 240 ggttcattca aatttctgcc ctatcaactt tcgatggtag gatagtggcc taccatggtt 300 tcaacgggta acggggaata agggttcgat tccggagagg gagcctgaga aacggctacc 360 acatccaagg aaggcagcag gcgcgcaaat tacccaatcc taattcaggg aggtagtgac 420 aataaataac gatacagggc ccattcgggt cttgtaattg gaatgagtac aatgtaaata 480 ccttaacgag gaacaattgg agggcaagtc tggtgccagc agccgcggta attccagctc 540 caatagcgta tattaaagtt gttgcagtta aaaagctcgt agttgaactt tgggcccggt 600 tggccggtcc gattttttcg tgtactggat ttccaacggg gcctttcctt ctggctaacc 660 ttgagtcctt gtggctcttg gcgaaccagg acttttactt tgaaaaaatt agagtgttca 720 aagcaggcgt attgctcgaa tatattagca tggaataata gaataggacg tttggttcta 780 ttttgttggt ttctaggacc atcgtaatga ttaataggga cggtcggggg catcagtatt 840 caattgtcag aggtgaaatt cttggattta ttgaagacta actactgcga aagcatttgc 900 caaggacgtt ttcattaatc aagaacgaaa gttaggggat cgaagatgat cagataccgt 960 cgtagtctta accataaact atgccgacta gggatcgggt ggtgtttttt taatgaccca 1020 ctcggcacct tacgagaaat caaagtcttt gggttctggg gggagtatgg tcgcaaggct 1080 gaaacttaaa ggaattgacg gaagggcacc accaggagtg gagcctgcgg cttaatttga 1140 ctcaacacgg ggaaactcac caggtccaga cacaataagg attgacagat tgagagctct 1200 ttcttgattt tgtgggtggt ggtgcatggc cgttcttagt tggtggagtg atttgtctgc 1260 ttaattgcga taacgaacga gaccttaacc tactaaatag tggtgctagc atttgctggt 1320 tatccacttc ttagagggac tatcggtttc aagccgatgg aagtttgagg caataacagg 1380 tctgtgatgc ccttagacgt tctgggccgc acgcgcgcta cactgacgga gccagcgagt 1440 ctaaccttgg ccgagaggtc ttggtaatct tgtgaaactc cgtcgtgctg gggatagagc 1500 attgtaatta ttgctcttca acgaggaatt cctagtaagc gcaagtcatc agcttgcgtt 1560 gattacgtcc ctgccctttg tacacaccgc ccgtcgctag taccgattga atggcttagt 1620 gaggcctcag gatctgctta gagaaggggg caactccatc tcagagcgga gaatttggac 1680 aaacttggtc attagagaac aaaagtagaa accgc 1715

Claims (5)

1) mixing flour, sugar, salt, starch cultured solid yeast, mashed potatoes, milk and water at 100 to 150 rpm;
2) mixing at 200 to 280 rpm, and mixing at 280 to 380 rpm;
3) adding olive oil while mixing at 100 to 150 rpm;
4) mixing at 200 to 280 rpm, and mixing at 280 to 380 rpm;
5) adding potato dice while mixing at 100 ~ 150rpm;
6) primary fermentation of the dough at room temperature;
7) dividing the dough into 130 ~ 170g and secondary fermentation at 34℃;
8) grease the dough with olive oil and bake in the oven,
The starch culture solid yeast is Saccharomyces cerevisiae deposited under the accession number KCTC 14504BP LE PAIN2021-1 strain 20 to 60 mesh potato, characterized in that it is prepared by culturing in starch dough granules Bread making method.
delete According to claim 1,
The strain is a method for producing potato bread, characterized in that it comprises the 18s rRNA sequence of [SEQ ID NO: 1].
According to claim 1,
The method for producing potato bread, characterized in that the isobutyric acid content in the cells is 100 ppm or less after the strain is cultured for 20 hours.
According to claim 1,
In step 1), 1000 g of flour, 20 g of sugar, 20 g of salt, 15 g of starch cultured solid yeast, 200 g of mashed potatoes, 200 g of milk, and 700 g of water are mixed in a mixing bowl and mixed at 125 rpm for 5 minutes. How to make potato bread.

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