WO2011052542A1 - 粉末米麹抽出組成物 - Google Patents
粉末米麹抽出組成物 Download PDFInfo
- Publication number
- WO2011052542A1 WO2011052542A1 PCT/JP2010/068865 JP2010068865W WO2011052542A1 WO 2011052542 A1 WO2011052542 A1 WO 2011052542A1 JP 2010068865 W JP2010068865 W JP 2010068865W WO 2011052542 A1 WO2011052542 A1 WO 2011052542A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rice bran
- lactic acid
- extract composition
- acid bacteria
- bran extract
- Prior art date
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P1/00—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes
- C12P1/04—Preparation of compounds or compositions, not provided for in groups C12P3/00 - C12P39/00, by using microorganisms or enzymes by using bacteria
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING OR TREATMENT THEREOF
- A23C9/00—Milk preparations; Milk powder or milk powder preparations
- A23C9/12—Fermented milk preparations; Treatment using microorganisms or enzymes
- A23C9/13—Fermented milk preparations; Treatment using microorganisms or enzymes using additives
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- A23L3/3472—
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/135—Bacteria or derivatives thereof, e.g. probiotics
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L7/00—Cereal-derived products; Malt products; Preparation or treatment thereof
- A23L7/20—Malt products
- A23L7/25—Fermentation of cereal malt or of cereal by malting
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2400/00—Lactic or propionic acid bacteria
- A23V2400/11—Lactobacillus
- A23V2400/169—Plantarum
Definitions
- the present invention relates to a powdered rice bran extract composition and a method for producing a plant lactic acid bacteria growth promoter, preservative and fermented food using the same.
- Lactic acid bacteria are a general term for microorganisms that generally produce lactic acid by fermentation, and play an important role in improving the flavor, structure, nutritional value of foods, or imparting preservability.
- various lactic acid bacteria such as the intestinal flora improving effect or the intestinal regulating action by ingesting live lactic acid bacteria, have been clarified, and foods, health foods, pharmaceuticals, etc. using the physiological action of the lactic acid bacteria has been researched and developed.
- plant lactic acid bacteria which are the main role of traditional fermented foods such as miso and pickles, are said to be strong lactic acid bacteria that can survive even in an environment with poor nutritional balance, and are attracting rapid attention.
- plant lactic acid bacteria have a particularly low ability to grow in milk compared to animal lactic acid bacteria, and their use in dairy products has been limited. Therefore, in lactic acid fermentation using plant lactic acid bacteria, if the growth promotion of the lactic acid bacteria, increase of the bacterial cell concentration, shortening of the fermentation time, etc. can be achieved, the industrial utility value is extremely large.
- sake lees sake lees extract, or enzymatic decomposition product of sake lees (see Patent Literatures 1 to 3), distillation residue of barley shochu (see Patent Literature 4), fermented wort (see Patent Literature 5), soybean meal
- fermented products see Patent Document 6
- sake lees have a unique smell and color, and there is a problem that the flavor, appearance and color of the final fermented food are impaired.
- the present invention provides a powdered rice bran extract composition that is easy to handle and does not impair the flavor of food, and a plant lactic acid bacteria growth promoter, preservative using the same, and a method for producing a fermented food using the same About.
- the present inventor can pulverize an aqueous extract of rice bran, which has been difficult to pulverize, with lactic acid bacteria, and this powdered rice bran extract composition has an excellent growth promoting effect on plant lactic acid bacteria.
- a plant lactic acid bacteria growth promoter when producing fermented foods, it further has a suppressive action on cosmetics or foods (hereinafter also referred to as “cosmetics etc.”). As found useful.
- the present invention relates to the following 1) to 10).
- a powdered rice bran extract composition obtained by inoculating and cultivating lactic acid bacteria in a liquid prepared from a rice bran aqueous extract having a Brix degree of 0.01 to 10 degrees, followed by cultivation.
- a method for producing a fermented food comprising fermenting milk, fruit juice or plant juice using plant lactic acid bacteria in the presence of the powdered rice bran extract composition of 1) or 2).
- a powdered rice bran extract composition characterized by inoculating and cultivating lactic acid bacteria in a liquid prepared from a rice bran aqueous extract to a Brix degree of 0.01 to 10 degrees, followed by cultivation. Production method.
- a method for promoting the growth of plant lactic acid bacteria comprising using the powdered rice bran extract composition of 1) or 2) above.
- a method for preserving cosmetics or foods wherein the powdered rice bran extract composition of 1) or 2) is used in cosmetics or foods.
- the powdered rice bran extract composition of the present invention or a plant lactic acid bacteria growth promoter containing the same is used, the growth of plant lactic acid bacteria can be promoted, and a savory fermented food, in particular, fermentation using plant lactic acid bacteria.
- a solid fermented milk that is difficult to produce in a short time.
- the powdered rice bran extract composition can be stored for a long period of time and is in a powder form and easy to handle, it is excellent in terms of work efficiency and cost in fermented food production.
- the powdered rice bran extract composition has antibacterial action against harmful bacteria such as Staphylococcus aureus, enterococci and Escherichia coli. , Its storage stability and stability can be improved.
- the graph which shows the influence with respect to the growth of Bacillus cerevisiae of a powdered rice bran extract composition (SN35N).
- the graph which shows the influence with respect to growth of Staphlococcus aureus of a powdered rice bran extract composition (SN35N).
- the graph which shows the influence with respect to the growth of Listeria rice monocytogenes of a powdered rice bran extract composition (SN35N).
- the graph which shows the growth promotion effect with respect to plant lactic acid bacteria of a powdered rice bran extract composition ((A): Powdered rice bran extract composition (pH 2.7), (B): Powdered rice bran extract composition (pH 5.3)).
- the water extract of rice bran used as a raw material is usually an aqueous solution containing a high concentration of glucose (for example, 20% (m / v) or more).
- an aqueous solution in which the water extract of the rice bran has a Brix degree of 5 to 40 degrees, more preferably 15 to 35 degrees is preferable.
- the Brix degree is usually a unit of the concentration of the sucrose solution and means the number of sucrose g in 100 g of the sucrose solution at 20 ° C.
- the Brix degree of the present invention is a value obtained by filtering a sample ( 20 ° C.) is a sucrose conversion value of a numerical value measured using a refractometer.
- the water extract of rice bran is obtained by adding water to extract rice bran, for example, suspending rice bran in water, adding a large amount of water to rice bran, etc. Is included.
- the water extract includes liquefaction and saccharification enzymes (starch hydrolase) produced by Aspergillus or rice low molecular weight products.
- starch hydrolase starch hydrolase
- the substrate rice is reduced in molecular weight by liquefaction and saccharification enzymatic decomposition, and an aqueous solution containing a high concentration of glucose, other monosaccharides, oligosaccharides, etc. It becomes a liquefied / saccharified solution.
- the residue (insoluble matter) removed by filtration at this time is also referred to as koji syrup (for example, yellow koji syrup when koji mold is A. oryzae, white koji syrup when A. kawachii is used).
- water extraction of rice bran is performed by adding 1 to 500 g (preferably 200 to 400 g) of rice bran (in terms of dry matter) to 1 L of an aqueous solution, and then at 30 to 70 ° C. (preferably 50 to 65 ° C.) for 1 minute. It may be allowed to stand for ⁇ 48 hours (preferably 18 to 30 hours).
- rice or a rice heat-treated product may be added, and stirring or shaking may be performed as necessary.
- Insoluble matter contained in the water extract eg, unliquefied rice, bacterial cells, enzymes, etc.
- “rice koji” means a koji mold culture of rice obtained by adding koji mold to rice or this heat-treated product or a suspension containing this, and culturing the koji mold.
- the koji mold culture may be carried out in accordance with a conventional method used in the production of sake or shochu. For example, rice or rice heat-treated product or a suspension containing the same is used as a medium, and the koji mold is inoculated and cultured. It may be performed by.
- rice bran examples include brown rice, polished rice, rice bran, or those obtained by physically pulverizing or crushing them (for example, rice flour), but polished rice having a high starch content. Or rice flour is preferred.
- rice heat-treated product when the rice is heat-treated in the presence of water, the subsequent saccharification / liquefaction of the rice is facilitated and sterilization is possible, so that the rice is cooked or wet-heated.
- the treatment include cooking polished rice, making it into a paste, treating the aqueous solution containing rice flour with pressure and heating, steaming the rice flour, and the like.
- the sterilized rice flour or steamed rice is more preferable as a raw material for making koji.
- Aspergillus is not particularly limited as long as it is capable of saccharifying and liquefying rice. Aspergillus oryzae, Aspergillus kawachii, used for sake, shochu, miso, soy sauce, etc .; Aspergillus kawachii Aspergillus oryzae; Aspergillus sojae; Aspergillus oryzae is particularly preferred. Aspergillus oryzae is particularly preferred. In addition, you may use the koji mold used individually or in combination of 2 or more types as appropriate.
- a water extract of the rice bran was prepared in a liquid prepared to have a Brix degree of 0.01 to 10 degrees (hereinafter also referred to as “water extract liquid”). After inoculating and culturing lactic acid bacteria, it can be dried. When inoculating lactic acid bacteria, the sugar content of the water extract of rice bran is adjusted so that the Brix degree is 0.01 to 10 degrees. Adjustment of the Brix degree may be performed by dilution with water, concentration, or the like. If the Brix degree of the raw material is within the range, there is no need to adjust the Brix degree. When the Brix degree is 0.01 to 10 degrees, the lactic acid bacteria can be cultured generally well.
- the solid content of the water extract liquid is preferably 0.5 to 4% by mass, more preferably 1 to 3% by mass.
- solid content (evaporation residue) means what remove
- lactic acid bacteria are inoculated into a solution containing an aqueous extract of rice bran having a adjusted Brix degree and cultured.
- the lactic acid bacteria culture may be carried out in accordance with a general lactic acid bacteria culture method.
- the lactic acid bacteria in the aqueous extract solution are 10 8 to the 9th order / mL (preferably 10 9th order or more / mL) and inoculating at 30 to 45 ° C. (preferably 30 to 40 ° C.) for 1 to 72 hours (preferably 16 to 32 hours).
- a pH adjusting agent such as sodium citrate and adjusting the medium pH to 5 to 8, more preferably 5 to 6, the number of lactic acid bacteria in the final product can be increased to a desired concentration. Therefore, it is preferable.
- a starter may be used for inoculation.
- the lactic acid bacteria to be used are not particularly limited, and for example, Lactobacillus bacteria, Streptococcus bacteria, Leuconostoc bacteria, Pediococcus bacteria, Bacillus bacteria, Lactococcus bacteria, Enterococcus bacteria, Tetragenococcus bacteria Examples include bacteria and Bifidobacterium.
- the separation source such as animals and plants is not particularly limited, and any of animal lactic acid bacteria and plant lactic acid bacteria may be used.
- plant lactic acid bacteria are preferable, and examples of the plant lactic acid bacteria include those described below. Among them, bacteria belonging to the genus Lactobacillus are preferable, and Lactobacillus plantarum is more preferable.
- the powdered rice bran extract composition of the present invention can be obtained by drying the culture solution.
- drying means general drying means may be used, for example, freeze drying, spray drying, hot air or cold air drying, etc., but freeze drying or cold air drying may be used in order to suppress denaturation of components. Spray drying is preferable from the viewpoint of work efficiency.
- the powdered rice bran extract composition Before drying, if necessary, sterilization treatment by heating, etc., centrifugation, removal of insoluble matter by filtration, etc., to sterilize lactic acid bacteria (in some cases lactic acid bacteria and bacilli), Insoluble matter may be removed, but when a strain with high health function is used as a plant lactic acid bacterium, the powdered rice bran extract composition has a useful function derived from the lactic acid bacterium in addition to the effect of promoting lactic acid bacterium growth. Since the effect by the sex molecule can be imparted, it is also useful to directly dry without performing sterilization treatment or insoluble matter removal treatment.
- a sterilization method used in general food production such as a pasteurization method, a high temperature sterilization method, a pressure heat sterilization method, or the like may be used. From the viewpoint of work efficiency, the pressure heat sterilization method is preferably used.
- Conventional water extract of rice bran is a liquid with high sugar content, so it is difficult to be powdered into a viscous liquid when dried, and therefore bulky and inconvenient to store and distribute, Since it contains water, its components are easily altered by various bacteria and enzymes, temperature, light, and the like, and when it is made viscous, its solubility in water deteriorates, making it difficult to handle industrially and commercially.
- the powdered rice bran extract composition can be used as a lactic acid bacteria growth promoter when performing lactic acid fermentation.
- Plant lactic acid bacteria generally have lower growth ability than animal lactic acid bacteria isolated from animal sources such as livestock meat and milk, and it is difficult to produce solid yogurt with plant lactic acid bacteria.
- the rice bran extract composition it is possible to produce a solid type yogurt.
- the powdered rice bran extract composition of the present invention comprises Streptococcus aureus, Enterococcus faecalis, Escherichia coli, Bacillus subtilis, Bacillus cereus, epidermal grape. It has the effect of suppressing the growth of harmful bacteria that cause food poisoning and infection such as Staphylococcus epidermidis and Listeria monocytogenes. Sake lees and sake lees extract are also known to have lactic acid bacteria growth promoting action, but at the same time activate the growth of Staphylococcus aureus and caries (Streptococcus mutans).
- the powdered rice bran extract composition of the present invention is more useful than sake lees when considering application to foods and the like.
- the powdered rice bran extract composition of the present invention having an action of suppressing the growth of harmful bacteria such as Staphylococcus aureus functions as a highly safe preservative derived from natural foods, and is incorporated into cosmetics and the like. , Exerts the effect of improving their storage stability and stability. In cosmetics, for example, lotion or lotion contained in bottles etc. is once received in the hand and applied to the skin, so there is a possibility that it will be contaminated with germs attached to the hand through the bottle receptacle, By adding a highly safe natural preservative, bacterial contamination of the product can be prevented.
- the plant lactic acid bacteria growth promoter of the present invention can be applied to plant lactic acid bacteria.
- Examples of applicable plant lactic acid bacteria isolated from plant sources such as cereals, vegetables, fruits, flowers, and medicinal plants include lactose. Lactobacillus plantarum, Lactobacillus hilgardii, Lactobacillus brevis, Lactobacillus curvatus, Lactobacillus curvatus, Lactobacillus fermentum ⁇ ⁇ ⁇ Lactobacillus fermentum (Leuconostoc mesenteroides), etc .; Enterococcus ⁇ munditi, Enterococcus Abium, etc .; Enterococcus Halophilus, etc.
- Examples of the genus bacteria include: Pediococcus pentosaceus, Pediococcus acidilactici and the like, and Bacillus coagulans and the like. .
- the plant lactic acid bacteria include Lactobacillus plantarum SN13T strain (NITE P-7), Lactobacillus plantarum SN26T strain (NITE P-8), Lactobacillus plantarum SN35N strain (NITE P-6), lacto Bacillus plantarum SN35M strain (NITE P-5), Lactococcus lactis subspecies Lactis SN26N strain (NITE P-9), Enterococcus species SN21I strain (NITE P-11), Enterococcus munti SN29N strain (NITE P-10) and Enterococcus Abium (NITE BP-142), Lactobacillus plantarum JCM 1149 strain, Lactobacillus plantarum JCM 8348 strain, Lactobacillus plantarum IFO 3070 (JCM 1057 shares), and the like Lactobacillus Hirugarudi NBRC15886 is.
- bacteria of the genus Lactobacillus are preferred because they grow well in the presence of the powdered rice bran extract composition of the present invention, and particularly Lactobacillus plantarum SN13T strain (NITE P-7). And Lactobacillus plantarum SN35N strain (NITE P-6).
- the powdered rice bran extract composition of the present invention is added to fermentation raw materials such as milk, vegetables and fruits so as to be in direct contact, or preferably in 0.01 to 10% (m / v) in 1 L of medium. More preferably 0.01 to 5% (m / v), still more preferably 0.5 to 2% (m / v), inoculated with lactic acid bacteria, and 10 to 80 at 25 to 45 ° C.
- fermented milk can be performed by culturing for a period of time.
- skim milk or milk in terms of dry matter
- m / v 0.1 to 20%
- an aqueous solution prepared by adjusting the concentration of non-fat milk solid content of milk to 8.0% (m / v) or more at a temperature of 65 to 130 ° C. for 1 second to 30 minutes.
- the mixture is sterilized by heating and cooled to a temperature of 30 to 45 ° C.
- milk liquid medium a liquid medium containing milk
- the powdered rice bran extract composition of the present invention is added to 0.1 to 5% (m / v) in 1 L of the medium, and the milk liquid medium containing the powdered rice bran extract composition is added.
- 0.1 to 6% (m / v) of lactic acid bacteria prepared as a starter and having a high concentration are inoculated into this medium.
- fermentation is performed in the presence of the powdered rice bran extract composition of the present invention at a temperature of 30 to 45 ° C. for 3 to 72 hours until the amount of lactic acid bacteria reaches 10 million cells / mL or more.
- the yogurt is cooled to the following.
- fermented milk beverages include milk (in aqueous solution, 1% (m / v) or more in terms of dry matter) or an aqueous solution prepared by mixing other ingredients at a temperature of 65 to 130 ° C. for 1 second to 30 minutes. And sterilize by heating for 30 minutes to cool to 30-45 ° C. Subsequently, 0.1 to 6% (m / v) of lactic acid bacteria are inoculated as a starter. After inoculation, fermentation is performed at a temperature of 30 to 45 ° C. for 12 to 72 hours in the presence of the powdered rice bran extract composition of the present invention. After the fermentation is complete, the cooled product is used as a fermented milk beverage.
- the drink may be used as it is, or may be diluted or sterilized.
- the content of the powder koji mold composition of the present invention in 1 L of an aqueous solution prepared with raw materials such as milk is preferably 0.1 to 2% (m / v).
- the fermented milk in addition to the raw milk, gelatin, agar, sugar, fragrance, pulp, nitrogen source, pH adjuster, and other ingredients used for the production of normal fermented beverages such as other lactic acid bacteria growth promoting components are used. It can also be added.
- sugars such as sucrose, glucose, fructose, palatinose, trehalose, sugar alcohols such as sorbitol, xylitol, erythritol, reduced starch syrup, high sweetness sweeteners such as aspartame, acesulfame potassium, sucrose fatty acid ester, glycerin fatty acid ester, lecithin Vitamin Add minerals such as calcium, iron, manganese, zinc, and other herbal medicines such as licorice, katsura, ginger, or food additives such as herbs, sodium glutamate, gardenia pigments, silicone, and phosphates. Is possible.
- milk that is a fermentation raw material
- animal milk such as cow's milk, goat milk, and sheep milk
- milk is particularly preferable.
- Such milk may be either non-sterilized milk or pasteurized milk, and concentrated milk or condensed milk prepared from these milks, skim milk, partially skimmed milk or powdered milk obtained by drying these powders. Etc.
- the fermented product (fermented milk) produced using the lactic acid bacteria growth promoter of the present invention thus obtained has a rapid progress of lactic acid fermentation as shown in the examples described later, that is, usually has a very low growth ability. Even when using a plant lactic acid bacterium that is said to be difficult to produce solid type fermented milk, it quickly becomes solid (solid fermented milk).
- the ability to grow plant lactic acid bacteria can be appropriately prepared, and any form of fermented milk such as plain type, soft type, drink type, solid (hard) type, frozen type, etc. It is possible to manufacture.
- the powdered rice bran extract composition of the present invention When used as a preservative, the powdered rice bran extract composition can be used as it is, but is further mixed with other additives to form a flaky, granular form Etc. may be prepared.
- the method of using the preservative may be added to foods, cosmetics and the like by an appropriate method, and the method of addition is not particularly limited.
- Foods to which the preservative of the present invention is applied include beverages such as fruit juice or vegetable juice beverages, carbonated beverages, tea beverages, alcoholic beverages, soft drinks, jelly-like foods and various snacks, baked goods, cakes, chocolates And various foods such as jams, breads, gums, rice cakes, soups, pickles, and boiled rice cakes.
- Cosmetics include basic cosmetics such as creams, emulsions, lotions, face wash, packs, makeup cosmetics such as lipsticks and foundations, detergents such as podisorps, soaps, hair nicks, hair liquids, hair set lotions. Any form of hair products such as hair blow agents, hair creams, hair coats, and hair care products such as shampoo, rinse, hair treatment toiletries, etc. may be used.
- the amount of the powdered rice bran extract composition added to foods and cosmetics varies depending on the type of food or cosmetic, and may be added in accordance with the purpose, but usually rice in 100 parts by mass of food or cosmetics
- the koji extract composition may be 0.5 to 10 parts by mass, preferably 1 to 5 parts by mass as the solid content.
- Example 1 Preparation of water extract of rice bran ⁇ Fungus used> A Lb. plantarum SN13T strain or Lb. plantarum SN35N strain of Lactobacillus plantarum was used. These are to the National Institute for Product Evaluation Technology Patent Microorganisms Depositary (Address: 2-8-8 Kazusa-Kamashita, Kisarazu City, Chiba Prefecture), Lactobacillus plantarum SN13T strain (NITE P-7) and Lactobacillus plantarum SN35N It has been deposited as a stock (NITE P-6) (Deposit date: July 6, 2004).
- the water extract of crude rice bran was roughly filtered, then sterilized by autoclave, and further subjected to fine filtration to obtain a water extract of rice bran (yellow syrup).
- the dried koji was obtained from Yaegaki Fermentation Engineering Co., Ltd. and was powdery.
- the solid content of the rice bran water extract (yellow syrup) was 21.6% by mass, and the Brix degree was 24.6 degrees.
- solid content is the value shown in (mass after drying / mass of jaundice syrup) ⁇ 100 (mass%) after heating the straw syrup at 105 ° C. and drying it. is there.
- the Brix degree is a sucrose-converted value of a numerical value obtained by filtering a sample (20 ° C.) using a refractometer.
- a sterilized rice bran extract liquid whose pH was not adjusted (pH 3.5) was used as a medium.
- the Lb. plantarum SN13T strain was inoculated into this medium, cultured at 37 ° C. for 24 hours (approximately 10 9 cells / mL or more), and then the culture was autoclaved at 121 ° C. for 20 minutes.
- the rice bran extract composition 1 (hereinafter also referred to as “powdered rice bran extract composition 1” or “13T (pH 3.5)”) obtained by lyophilizing the sterilized lactic acid bacteria culture solution is obtained. It was.
- ⁇ Preparation of rice bran extract composition 3> Also, except that the lactic acid bacterium to be inoculated was Lb. plantarum SN35N strain, when lactic acid bacteria were cultured in the same manner as in ⁇ Preparation of powdered rice bran extract composition 2> above, powdered rice bran extracted by freeze-drying was extracted. Composition 3 (hereinafter also referred to as “powdered rice bran extract composition 3” or “35N (pH 5.3)”) was obtained. ⁇ Preparation of sake lees powder> Commercially available sake lees were made into liquor powder by spray drying.
- Example 2 Lactic Acid Bacteria Growth Promotion Test (1) and Fermented Milk Solidification Test ⁇ Preculture (Preparation of Starter)>
- the Lb. plantarum SN35N strain was cultured in a lactic acid bacteria culture medium (MRS medium) at 37 ° C. for 24 hours. After the cultivation, it was washed with a phosphate buffer (pH 7.0) and suspended in sterilized water to prepare a starter of Lb. plantarum SN35N strain.
- MRS medium lactic acid bacteria culture medium
- a 13% nonfat dry milk-containing aqueous solution hereinafter, also referred to as “milk medium”
- 1.0% or 1.5% mass / Volume
- % (mass / volume) is referred to as “% (m / v)”
- a milk medium containing the powdered rice bran extract composition 1 of each concentration was prepared.
- a milk medium without the powdered rice bran extract composition was used as a control (also referred to as “CT”).
- a milk medium containing each concentration of sake cake was prepared in the same manner as described above except that “powdered rice cake extract composition 1” was replaced with “sake cake powder”.
- a starter (L. plantarum SN35N strain) prepared as described above was added to each of the above milk media so as to be 1% (v / v), and cultured at 37 ° C. for 36 hours.
- the powdered rice bran extract composition of the present invention has an effect of promoting the growth of lactic acid bacteria. I found it. At this time, solidification of the fermented milk of the plant lactic acid bacteria proceeds well at any concentration of 1.0% (m / v) and 1.5% (m / v), and almost no fermented milk is obtained in 24 hours. It was solidified. Furthermore, when the sake lees powder and the powdered rice bran extract composition were compared, even when 1.0% (m / v) of the sake lees powder was added, the smell of liquor was unique and the flavor of the solid fermented milk was impaired.
- the powdered rice bran extract composition of the present invention can be used for the production of solid fermented milk using plant lactic acid bacteria. Moreover, since the powdered rice bran extract composition itself does not have an unpleasant odor, the powdered rice bran extract composition of the present invention does not impair the flavor of the fermented food even if the amount added is increased. It has a high utility value.
- the non-adjusted (pH 3.5) was slightly solidified faster than the pH-adjusted (pH 5.3).
- the pH of the lactic acid bacteria culture solution for producing the powdered rice bran extract composition of the present invention may be in the range of 3-6.
- pH 3 even if lactic acid bacteria do not grow to a desired concentration, there is a possibility that the milk solidifies due to an additive effect with the acidity in the medium.
- the initial pH of the medium is preferably in the range of 5-6.
- the powdered rice bran extract composition 2 produced by culturing with Lactobacillus plantarum SN13T strain was earlier solidified than the powdered rice bran extract composition 3 produced by culturing with Lactobacillus plantarum SN35N strain.
- the lactic acid bacteria used in producing the powdered rice bran extract composition of the present invention may be animal lactic acid bacteria or plant lactic acid bacteria. I thought it was okay.
- Example 3 Growth promotion test of harmful bacteria (1) Staphlococcus aureus (IFO 12732) strain was used as harmful bacteria.
- the liquor powder used above, the powdered rice bran extract composition 1 (13T) or the powdered rice bran extract composition 3 (35N) prepared in Example 1 was used as a sample, and a Luria Broth (LB) medium (Sigma Aldrich) was used. (Japan)) 0.75% (m / v) of each medium to prepare each medium, each medium is inoculated with Staphlococcus aureus (IFO 12732) strain, and cultured at 37 ° C. The cell turbidity was measured every 6 hours (OD 600 nm).
- a medium (CT) not containing these was used as a control.
- CT a medium
- harmful bacteria grew in sake lees, whereas no harmful bacterial growth was observed in the powdered rice bran extract compositions 1 and 2. That is, the powdered rice bran extract composition of the present invention can grow lactic acid bacteria, particularly plant lactic acid bacteria having a slow growth ability, without causing harmful bacteria to grow, so it is considered highly useful in the food industry field. .
- MRSA methicillin-resistant Staphylococcus aureus
- multidrug-resistant bacteria multidrug-resistant bacteria
- Example 4 Growth promotion test of harmful bacteria (2) As harmful bacteria, Enterococcus faecalis IFO12964, Escherichia coli DH5 ⁇ , Bacillus subtilis ATCC6633, Bacillus cereus ATCC11778, Staphylococcus epidermidis NBRC12993, Listeria monocytogenes ATCC15313 strain were used. Also, Staphlococcus aureus was tested in the same manner as each bacterium using the same IFO 12732 strain as in Example 3 under the conditions shown below. Powdered rice bran extract composition (SN35N (pH 2.7)) produced by inoculating and culturing (pH 2.7) Lb.
- SN35N pH 2.7
- the powdered rice bran extract composition of the present invention was found to have an effect of suppressing the growth of harmful bacteria.
- the powdered rice bran extract composition is considered to be a preservative for foods and cosmetics.
- Example 5 Growth promotion test of plant lactic acid bacteria (2) The above-mentioned Lb. plantarum SN13T strain was used as a plant lactic acid bacterium. Powdered rice bran extract composition (SN13T (pH 2)) produced by inoculating and culturing (pH 2.7, pH 5.3) each of Lb. plantarum SN13T strain and Lb. plantarum SN35N strain in the same manner as in Example 1. 7), SN13T (pH 5.3), SN35N (pH 2.7), and SN35N (pH 5.3)) were used as samples and added to the MRS medium at 0.75% (m / v), respectively.
- SN13T pH 2
- the powdered rice bran extract composition of the present invention has an effect of promoting the growth of plant lactic acid bacteria, and this effect is obtained in a composition prepared by inoculating lactic acid bacteria at pH 5-6. It was shown to improve more.
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Abstract
Description
従って、植物乳酸菌を用いた乳酸発酵において、当該乳酸菌の増殖促進、菌体濃度の増加、発酵時間の短縮等が達成できれば、産業上の利用価値は極めて大きい。
しかしながら、酒粕や焼酎蒸留残液の如何なる成分に乳酸菌増殖促進作用があるのかは未だ明らかにされていない。また、酒粕には、独特の臭いや色があり最終品である発酵食品の、風味、外観や色合いを損ねると云う問題もある。
しかしながら、米麹の水抽出物に、植物乳酸菌増殖促進作用や、乳酸菌以外の菌に対しては抗菌作用があることは知られていない。
1) 米麹の水抽出物をブリックス度0.01~10度になるように調製した液に、乳酸菌を植菌して培養した後、乾燥して得られる粉末米麹抽出組成物。
2) 米麹が、黄麹菌培養物である前記1)の粉末米麹抽出組成物。
3) 前記1)又は2)の粉末米麹抽出組成物を含有する植物乳酸菌増殖促進剤。
4) 前記1)又は2)の粉末米麹抽出組成物を含有する防腐剤。
5) 化粧料に配合して用いる、前記4)の防腐剤。
6) 前記1)又は2)の粉末米麹抽出組成物の存在下、植物乳酸菌を用いて乳、果汁又は植物汁を発酵することを特徴とする発酵食品の製造方法。
7) 前記1)又は2)の粉末米麹抽出組成物の存在下、植物乳酸菌を用いて乳を発酵することによって製造されたはっ酵乳。
8) 米麹の水抽出物をブリックス度0.01~10度になるように調製した液に、乳酸菌を植菌して培養した後、乾燥することを特徴とする粉末米麹抽出組成物の製造方法。
9) 前記1)又は2)の粉末米麹抽出組成物を用いることを特徴とする植物乳酸菌の増殖促進方法。
10) 前記1)又は2)の粉末米麹抽出組成物を化粧料又は食品に用いることを特徴とする当該化粧料又は食品の防腐方法。
ここで、ブリックス度とは、通常はショ糖溶液の濃度の単位で、20℃におけるショ糖溶液100g中のショ糖g数を云うが、本発明のブリックス度とは、試料をろ過したもの(20℃)を、屈折糖度計を用いて計測された数値のショ糖換算値である。
また、水抽出物に含まれる不溶解物(例えば、未液化米、菌体や酵素等)を、遠心分離やろ過等によって除去してもよく、また加熱等によって麹菌を殺菌するか、酵素を失活させてもよい。
麹菌培養は、日本酒や焼酎の製造において行われる常法に従って行えばよいが、例えば、米若しくは米加熱処理物又はこれを含む懸濁液を培地として、これに、麹菌を接種して培養することにより行えばよい。
また、米加熱処理物としては、米を水の存在下で加熱処理するとその後の米の糖化・液化が容易となると共に殺菌もできるので、米を蒸煮処理又は湿熱加熱処理したものが好ましい。当該処理としては、例えば、精白米を炊くことやこれを更にペースト状にすること、また米粉を含む水溶液を加圧加熱処理することや米粉に水蒸気処理すること等が挙げられる。その殺菌済みの米粉や蒸米が麹をつくるための原料としてより好ましい。
なお、使用する麹菌は、適宜単独で又は2種以上組み合わせて用いてもよい。
乳酸菌の植菌に際し、米麹の水抽出物の糖度を、ブリックス度0.01~10度になるように調製する。ブリックス度の調整は、水での希釈や濃縮等により行えばよく、原料のブリックス度が当該範囲内であれば特に調整しなくともよい。
ブリックス度は、0.01~10度の場合に、乳酸菌の培養を概ね良好に行うことができるが、更に乳酸菌の培養を良好にする点で、0.05~5度、より0.1~4度であるのが好ましく、更に、作業効率の点から、0.5~3度であるのが好ましい。
また、この場合の水抽出物液の固形分は、0.5~4質量%、より1~3質量%であるのが好ましい。尚、固形分(蒸発残分)とは、水等の揮発できる成分を除いたものをいい、[(乾燥後の質量/乾燥前の質量)×100]で算出し、質量%で表示するものを云う。
乳酸菌培養は、一般的な乳酸菌培養方法に従って行えばよく、例えば、上記水抽出物液中、乳酸菌が、10の8乗から9乗オーダー個/mL(好ましくは、10の9乗オーダー個以上/mL)になるように接種し、30~45℃(好ましくは30~40℃)で、1~72時間(好ましくは16~32時間)行えばよい。このとき、クエン酸ナトリウム等のpH調整剤を添加して、培地pHを、5~8、より5~6に調整するのが、最終製品中の乳酸菌数を所望の濃度にまで高めることができるので、好ましい。
なお、植菌に際し、スターターを用いてもよい。
なお、使用する乳酸菌は、適宜単独で又は2種以上組み合わせて用いてもよい。
乾燥手段としては、一般的な乾燥手段を用いればよく、例えば、凍結乾燥、噴霧乾燥、及び温風若しくは冷風乾燥等が挙げられるが、成分の変性を抑制する点で、凍結乾燥や冷風乾燥が好ましく、作業効率の点で、噴霧乾燥が好ましい。
殺菌は、一般的な食品製造に用いる殺菌方法、例えば低温殺菌法、高温殺菌法、加圧加熱殺菌法等を用いればよく、作業効率の点から、加圧加熱殺菌法を用いるのが好ましい。
植物乳酸菌は、一般的に、畜肉・乳等の動物源から分離された動物乳酸菌に比べて増殖能が低く、植物乳酸菌では固形タイプのヨーグルトを製造することが困難であるが、本発明の粉末米麹抽出組成物を用いることにより固形タイプのヨーグルトを製造することが可能となる。
また、本発明の粉末米麹抽出組成物は、黄色ブドウ球菌(Streptococcus aureus)、腸球菌(Enterococcus faecalis)、大腸菌(Escherichia coli)、枯草菌(Bacillus subtilis)、セレウス菌(Bacillus cereus)、表皮ブドウ球菌(Staphylococcus epidermidis)、リステリア菌(Listeria monocytogenes)等の食中毒や感染症の原因となる有害菌の増殖を抑制する作用を有する。酒粕や酒粕抽出物も乳酸菌増殖促進作用を有することが知られているが、同時に黄色ブドウ球菌や虫歯菌(Streptococcus mutans)の増殖を活性化する。従って、本発明の粉末米麹抽出組成物は、食品等への応用を考えると、酒粕よりも有用性が高いと云える。
また、黄色ブドウ球菌等の有害菌の増殖を抑制する作用を有する本発明の粉末米麹抽出組成物は、天然食品由来の安全性が高い防腐剤として機能し、化粧料等に配合することにより、それらの保存性、安定性を高める効果を発揮する。化粧料においては、例えば、ボトルなどに入っている化粧水やローション等は一旦手に受けて皮膚に塗布するので、ボトルの受け口を通じて手に付着している雑菌で汚染される可能性があり、安全性の高い天然防腐剤を添加しておくことにより、当該製品の細菌汚染を防止することができる。
この植物乳酸菌のうち、本発明の粉末米麹抽出組成物の存在下で良好に増殖する点から、ラクトバチルス属細菌、更にラクトバチルスプランタルムが好ましく、特にラクトバチルス プランタルムSN13T株(NITE P-7)及びラクトバチルス プランタルムSN35N株(NITE P-6)が好ましい。
例えば、乳、野菜、果物等の発酵原料に、本発明の粉末米麹抽出組成物を、直接接触させるように添加したり、培地1L中、好ましくは0.01~10%(m/v)、より好ましくは0.01~5%(m/v)、更に好ましくは0.5~2%(m/v)になるように添加し、乳酸菌を接種し、25~45℃で10~80時間培養することにより行うことができる。
以下に、はっ酵乳を製造する場合を例に挙げて説明するが、はっ酵乳を製造する際に、培地1L中に、スキムミルクや乳(乾燥物換算)を0.1~20%(m/v)で含有するのが好ましい。
例えば、ヨーグルト発酵を行う場合、乳を主原料とする無脂乳固形分が8.0%(m/v)以上の濃度に調整した水溶液を、65~130℃の温度で1秒~30分の時間、加熱殺菌を行ない、30~45℃の温度まで冷却し、乳を含む液体培地(以下、「乳液体培地」とも云う)を調製する。この乳液体培地に、培地1L中、本発明の粉末米麹抽出組成物を0.1~5%(m/v)になるように添加し、当該粉末米麹抽出組成物を含む乳液体培地を調製する。続いて、この培地に、スターターとして調製され、高濃度となっている乳酸菌を、0.1~6%(m/v)接種する。接種後、本発明の粉末米麹抽出組成物の存在下、30~45℃の温度で3~72時間、乳酸菌量が1000万個/mL以上になるまで発酵を行ない、発酵終了後、10℃以下まで冷却したものをヨーグルトとする。
当該防腐剤の使用方法は、食品、化粧料等に適当な方法で添加すればよく、添加する方法は特に制限はない。
本発明の防腐剤を適用する食品としては、果汁又は野菜汁飲料、炭酸飲料、茶系飲料、アルコール飲料、清涼飲料等の飲料や、ゼリー状食品や各種スナック類、焼き菓子、ケーキ類、チョコレート、ジャム、パン、ガム、飴、スープ類、漬物、佃煮などの各種食品を挙げることができる。
また、化粧料としては、クリーム、乳液、ローション、洗顔料、パック等の基礎化粧料、口紅、ファンデーション等のメイクアップ化粧料、ポディソープ、石鹸等の洗浄剤、ヘアートニック、ヘアーリキッド、ヘアーセットローション、ヘアーブロー剤、ヘアークリーム、ヘアーコート等のヘアー製品やシャンプー、リンス、ヘアートリートメント等の頭髪用トイレタリー等のヘアーケアー製品の形態等の何れでもよい。
食品や化粧料への粉末米麹抽出組成物の添加量は、食品又は化粧料の種類により異なり、その目的に応じた量を添加すれば良いが、通常食品又は化粧料100質量部中の米麹抽出組成物を固形分として0.5~10質量部、好ましくは1~5質量部とすれば良い。
<使用する菌>
ラクトバチルス プランタルムの一種Lb. plantarum SN13T株又はLb. plantarum SN35N株を用いた。
これらは、独立行政法人製品評価技術基盤機構 特許微生物寄託センター(住所:千葉県木更津市かずさ鎌足2丁目5番8号)へ、ラクトバチルス プランタルムSN13T株(NITE P-7)及びラクトバチルス プランタルムSN35N株(NITE P-6)として寄託されているものである(寄託日:2004年7月6日)。
<米発酵エキスの調製>
乾燥麹(黄麹菌:Aspergillus oryzae)350gに水1Lを添加し、60℃で24時間糖化・液化を行いつつ水抽出を行い、粗米麹の水抽出物を得た。粗米麹の水抽出物を、粗ろ過し、次いでオートクレーブ殺菌し、更に精密ろ過し、米麹の水抽出物(黄麹シロップ)を得た。乾燥麹は、ヤエガキ醗酵技研(株)から入手し、粉末状であった。
米麹の水抽出物(黄麹シロップ)の固形分は、21.6質量%であり、ブリックス度は24.6度であった。
なお、固形分(蒸発残分)は、麹シロップを105℃で熱し、乾燥後、この質量を量り、(乾燥後の質量/黄麹シロップの質量)×100(質量%)で示した値である。
また、ブリックス(Brix)度は、試料をろ過したもの(20℃)を、屈折糖度計を用いて計測された数値のショ糖換算値である。
<粉末米麹抽出組成物1の調製>
上記で得られた米麹の水抽出物を水で10倍希釈した調製液(ブリックス度2.5度、固形分2.2質量%)を、121℃で、20分オートクレーブ殺菌し、殺菌済の米麹水抽出物液を調製した。
更に、殺菌済の米麹水抽出物液でpH未調整(pH3.5)のものを培地として用いた。
この培地にLb. plantarum SN13T菌株を植菌し、37℃で、24時間培養(概ね109個/mL以上)し、その後培養液を121℃、20分でオートクレーブ殺菌した。次いで、この殺菌済乳酸菌培養液を凍結乾燥することで粉末化した米麹抽出組成物1(以下、「粉末米麹抽出組成物1」又は「13T(pH3.5)」とも云う)が得られた。
なお、上記pH未調整の殺菌済の米麹水抽出物液に乳酸菌を植菌後、直ちにオートクレーブ殺菌し、凍結乾燥したが、粉末化できず、粘液状のままであった。
<粉末米麹抽出組成物2の調製>
また、植菌前の上記培地のpHをクエン酸NaでpH5.3に調整した以外は上記<粉末米麹抽出組成物1の調製>と同様にして乳酸菌の培養を行うと、凍結乾燥することで粉末化した米発酵物2(以下、「粉末米麹抽出組成物2」又は「13T(pH5.3)」とも云う)が得られた。
<米麹抽出組成物3の調製>
また、植菌する乳酸菌をLb. plantarum SN35N菌株とした以外は、上記<粉末米麹抽出組成物2の調製>と同様にして乳酸菌を培養すると、凍結乾燥することで粉末化した粉末米麹抽出組成物3(以下、「粉末米麹抽出組成物3」又は「35N(pH5.3)」とも云う)が得られた。
<酒粕粉末の調製>
市販品の酒粕を噴霧乾燥にて酒粕粉末とした。
<前培養(スターターの調製)>
上記Lb. plantarum SN35N株を乳酸菌培養培地(MRS培地)にて37℃で24時間培養した。培養後、リン酸バッファー(pH7.0)で洗浄し滅菌水に懸濁して、Lb. plantarum SN35N株のスターターを調製した。
<本培養(脱脂粉乳培地の使用)>
(1)13%脱脂粉乳含有水溶液(以下、「乳培地」とも云う)に、上記実施例1で製造された粉末米麹抽出組成物1を、それぞれ1.0又は1.5%(質量/容量)〔以下、「%(質量/容量)」を「%(m/v)」とする〕になるよう添加し、各濃度の粉末米麹抽出組成物1を含む乳培地を調製した。なお、粉末米麹抽出組成物の無添加の乳培地をコントロール(「CT」とも云う)とした。
また、「粉末米麹抽出組成物1」を「酒粕粉末」に代えた以外は、上記と同様にして、各濃度の酒粕を含む乳培地を調製した。
(2)また、「粉末米麹抽出組成物1」を「粉末米麹抽出組成物2」に代えた以外は、上記と同様にして、各濃度の粉末米麹抽出組成物2を含む乳培地を調製した。
(3)また、「粉末米麹抽出組成物1」を「粉末米麹抽出組成物3」に代えた以外は、上記と同様にして、各濃度の粉末米麹抽出組成物3を含む乳培地を調製した。
(4)上記各乳培地に、上述のとおり調製されたスターター(L. plantarum SN35N株)を1%(v/v)になるように加え、37℃で36時間培養を行った。
さらに、酒粕粉末と粉末米麹抽出組成物とを比較すると、酒粕粉末を1.0%(m/v)添加した場合でも酒独特の臭いがあり固形はっ酵乳の風味を損なったのに対し、粉末米麹抽出組成物を1.5%(m/v)添加した場合であっても不快な臭いはなく、得られた固形はっ酵乳の風味、食感、外観等を損なうこともなかったので、本発明の粉末米麹抽出組成物は、植物乳酸菌を用いた固形はっ酵乳の製造に使用できる。
また、もともと粉末米麹抽出組成物自体に不快臭がないので、添加量を増加させても発酵食品の風味を損なうことがないので、本発明の粉末米麹抽出組成物は、広範囲の発酵食品に利用できる利用価値の高いものである。
また、粉末米麹抽出組成物を得る際に、pH調製(pH5.3)したものよりも未調整(pH3.5)のものの方が、若干固化が早かったが、何れのものを用いても良好にはっ酵乳の固化が進行したので、本発明の粉末米麹抽出組成物を製造する際の乳酸菌培養液のpHは、3~6の範囲であればよい。ただし、pH3の場合は、乳酸菌が所望の濃度にまで増殖していなくとも、培地中の酸度との相加効果により乳が固化する可能性がある。はっ酵乳の場合は1mL当たり最低でも1000万個の乳酸菌数の存在が必須条件であるため、培地の初発のpHは5~6の範囲が望ましいと考えられる。
また、ラクトバシルス プランタルムSN35N株で培養を行って製造された粉末米麹抽出組成物3よりも、ラクトバシルス プランタルムSN13T株で培養を行って製造された粉末米麹抽出組成物2の方が、固化は早かったものの、何れの粉末米麹抽出組成物を用いても良好にはっ酵乳の固化が進行したので、本発明の粉末米麹抽出組成物を製造する際に使用する乳酸菌は、動物乳酸菌でも植物乳酸菌でもよいと考えた。
有害菌として、Staphlococcus aureus(IFO 12732)株を用いた。
また、上記で用いた酒粕粉末、実施例1で調製した粉末米麹抽出組成物1(13T)又は粉末米麹抽出組成物3(35N)を試料として用い、Luria Broth (LB)培地(シグマアルドリッチ・ジャパン社製)にそれぞれ0.75%(m/v)となるように添加して各培地を調製後、各培地に、Staphlococcus aureus(IFO 12732)菌株を接種し、37℃で、培養を行い、6時間ごとに、菌体濁度測定(OD600nm)を行った。これらを含まない培地(CT)をコントロールとして用いた。
図2に示すように、酒粕では有害菌が増殖するのに対し、粉末米麹抽出組成物1及び2共に有害菌の増殖が認められなかった。すなわち、本発明の粉末米麹抽出組成物は、有害菌を増殖させることなく、乳酸菌、特に増殖能の遅い植物乳酸菌を増殖させることができるので、食品工業分野においての利用性が高いと考えられる。また、黄色ブドウ球菌(Staphylococcus aureus)の有害菌の増殖を抑えることから、メチシリン耐性黄色ブドウ球菌(MRSA)を始めとする、各種抗生物質に対する耐性細菌(多剤耐性細菌)等の重篤な感染症の原因菌の増殖を抑えることが十分期待できる。
有害菌として、Enterococcus faecalis IFO12964、Escherichia coli DH5α、Bacillus subtilis ATCC6633、Bacillus cereus ATCC11778、Staphylococcus epidermidis NBRC12993、Listeria monocytogenes ATCC15313株を用いた。また、Staphlococcus aureusについても、実施例3と同様のIFO 12732株を用い、以下に示す条件で各菌と同様に試験を行った。
実施例1と同様の方法で、米麹水抽出物液にLb. plantarum SN35N株を植菌して培養(pH2.7)して製造された粉末米麹抽出組成物(SN35N(pH2.7))を試料として用い、Escherichia coli、Bacillus属、Staphylococcus属についてはLuria Broth(LB)培地(シグマアルドリッチ・ジャパン社製)、Enterococcus属およびLactobacillus属に関してはMRS培地、Listeria属に関してはTY培地(3(W/V)% triptic soya broth, 0.3(W/v)% yeast extract)に、それぞれ1.0%(m/v)となるように添加して各培地を調製後、各培地に、上記の各菌株を接種し、37℃で、培養を行い、6時間ごとに、菌体濁度測定(OD600nm)を行った。これらを含まない培地をコントロールとして用いた。
図3~9に示すように、本発明の粉末米麹抽出組成物は、有害菌の増殖を抑制する作用が認められた。当該粉末米麹抽出組成物は、食品や化粧品の防腐剤となり得ると考えられる。
植物乳酸菌として、上記のLb. plantarum SN13T株を用いた。
実施例1と同様の方法でLb. plantarum SN13T株及びLb. plantarum SN35N株をそれぞれ植菌して培養(pH2.7、pH5.3)して製造された粉末米麹抽出組成物(SN13T(pH2.7)、SN13T(pH5.3)、SN35N(pH2.7)、SN35N(pH5.3))を試料として用い、MRS培地にそれぞれ0.75%(m/v)となるように添加して各培地を調製後、各培地に、上記の植物乳酸菌株を接種し、37℃で、培養を行い、6時間ごとに、菌体濁度測定(OD600nm)を行った。これらを含まない培地をコントロールとして用いた。
図10に示すように、本発明の粉末米麹抽出組成物は、植物乳酸菌の増殖を促進する作用が認められ、当該作用は、pH5~6で乳酸菌を植菌して調製された組成物においてより向上することが示された。
Claims (10)
- 米麹の水抽出物をブリックス度0.01~10度になるように調製した液に、乳酸菌を植菌して培養した後、乾燥して得られる粉末米麹抽出組成物。
- 米麹が、黄麹菌培養物である請求項1記載の粉末米麹抽出組成物。
- 請求項1又は2記載の粉末米麹抽出組成物を含有する植物乳酸菌増殖促進剤。
- 請求項1又は2記載の粉末米麹抽出組成物を含有する防腐剤。
- 化粧料に配合して用いる、請求項4記載の防腐剤。
- 請求項1又は2記載の粉末米麹抽出組成物の存在下、植物乳酸菌を用いて乳、果汁又は植物汁を発酵することを特徴とする発酵食品の製造方法。
- 請求項1又は2記載の粉末米麹抽出組成物の存在下、植物乳酸菌を用いて乳を発酵することによって製造されたはっ酵乳。
- 米麹の水抽出物をブリックス度0.01~10度になるように調製した液に、乳酸菌を植菌して培養した後、乾燥することを特徴とする粉末米麹抽出組成物の製造方法。
- 請求項1又は2記載の粉末米麹抽出組成物を用いることを特徴とする植物乳酸菌の増殖促進方法。
- 請求項1又は2記載の粉末米麹抽出組成物を化粧料又は食品に用いることを特徴とする当該化粧料又は食品の防腐方法。
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CN103450062A (zh) * | 2013-01-25 | 2013-12-18 | 南通大学 | 一种治疗肿瘤的双靶点药物化合物及其制备方法和用途 |
JP2018012675A (ja) * | 2016-07-22 | 2018-01-25 | 国立大学法人広島大学 | 細菌増殖抑制剤 |
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KR20120099054A (ko) | 2012-09-06 |
TW201124090A (en) | 2011-07-16 |
JP6183794B2 (ja) | 2017-08-23 |
US8691220B2 (en) | 2014-04-08 |
JPWO2011052542A1 (ja) | 2013-03-21 |
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US20120263704A1 (en) | 2012-10-18 |
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