JP5829728B2 - Culture medium - Google Patents

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JP5829728B2
JP5829728B2 JP2014138056A JP2014138056A JP5829728B2 JP 5829728 B2 JP5829728 B2 JP 5829728B2 JP 2014138056 A JP2014138056 A JP 2014138056A JP 2014138056 A JP2014138056 A JP 2014138056A JP 5829728 B2 JP5829728 B2 JP 5829728B2
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rapeseed meal
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sieving
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三四郎 齋藤
三四郎 齋藤
佐藤 俊郎
俊郎 佐藤
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株式会社J−オイルミルズ
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Description

本発明は菌の生育が良好な培地源を利用した培地に関する。   The present invention relates to a medium using a medium source with good growth of bacteria.

菌の培養に用いる培地には、窒素、炭水化物、ミネラルなどの栄養素を用途に適した量を配合して作成され、その栄養源は農産物やその加工品、抽出精製品、合成品、食品残渣など多岐に渡る。特に窒素に関しては蛋白質や核酸を構成するのに必須な成分であり、ほとんど全ての菌が生育のために必須としているにもかかわらず、これを豊富に含む培地素材はそれほど多くはない。例えば一般的な微生物培養に用いる窒素栄養源としては、ペプトン、酵母エキス、肉エキス、ホエー、カザミノ酸、カシトン、ソイトン、各種アミノ酸、動物血液、尿素、アンモニウム塩、などが多く利用され、食品生産場面においてはヨーグルトにおける牛乳、しょうゆや味噌、納豆における大豆なども窒素源となる。   The culture medium used for culturing fungi is prepared by blending nutrients such as nitrogen, carbohydrates, and minerals suitable for the intended use, and the nutrient source is agricultural products, processed products, extracted refined products, synthetic products, food residues, etc. Wide variety. In particular, nitrogen is an essential component for constructing proteins and nucleic acids, and despite the fact that almost all bacteria are essential for growth, there are not so many medium materials containing them. For example, as a nitrogen nutrient source used for general microorganism culture, peptone, yeast extract, meat extract, whey, casamino acid, casitaton, soyton, various amino acids, animal blood, urea, ammonium salt, etc. are often used for food production In the scene, milk in yogurt, soy sauce and miso, and soybeans in natto are also sources of nitrogen.

一方で家畜に対する窒素栄養源としては、最も使用量が多い大豆ミール、2番目に多い菜種ミールが大半を占め、コーングルテンミール、魚粉、肉骨粉、脱脂粉乳、乾燥ホエーなどがこれらに続く。先に述べたとおり、菌の培養においては様々な窒素源が利用されているが、飼料として使用率が高い菜種ミールについては利用が少ない。理由は、食品分野においては菜種ミールを発酵させた食品が存在しないこともある。しかしながら何よりも、菜種ミール自体が菌の生育に適さず、窒素源として培地に利用しようとしても菌が成長あるいは増殖しにくいという問題点があった。   On the other hand, as the nitrogen nutrient source for livestock, the most used soybean meal and the second most rapeseed meal account for the majority, followed by corn gluten meal, fish meal, meat-and-bone meal, skim milk powder, and dried whey. As described above, various nitrogen sources are used for culturing bacteria, but rapeseed meal, which has a high usage rate as feed, is less used. The reason is that there is no food in which rapeseed meal is fermented in the food field. However, above all, the rapeseed meal itself is not suitable for the growth of the fungus, and there is a problem that the fungus is difficult to grow or proliferate even if it is used as a nitrogen source in the medium.

また、この菜種ミールの成分の改善に関しては、特許第3970917号において、特定のメッシュのふるいで篩うことにより窒素含量を調整する方法が開示されている。しかし、培地への効果については全く記載がされていない。菜種ミールはそもそも窒素が豊富に含まれており、培地として利用されにくかった問題点は、窒素含量が調節されることによって解決されるものではない。
特許第3970917号
Regarding the improvement of the rapeseed meal component, Japanese Patent No. 39701717 discloses a method of adjusting the nitrogen content by sieving with a specific mesh sieve. However, there is no description about the effect on the medium. The rapeseed meal is rich in nitrogen in the first place, and the problem that was difficult to be used as a medium cannot be solved by adjusting the nitrogen content.
Japanese Patent No. 39701717

従って、本発明の目的は、豊富な窒素を含んでいるにもかかわらず、窒素源として菌等の成長しにくい、あるいは増殖しにくい菜種ミールの問題点に鑑みて、菜種ミールを利用した菌等の発育に適した培地源を含む培地を提供せんとするものである。   Therefore, in view of the problem of rapeseed meal that is difficult to grow or proliferate as a nitrogen source despite containing abundant nitrogen, the object of the present invention is to use a rapeseed meal, etc. It is intended to provide a medium containing a medium source suitable for the development of the above.

本発明者らは上記の課題を解決するために鋭意研究を重ねたところ、菜種ミールを分画して得られる各画分が菌の増殖に優れることを見出し、さらに研究を重ねた結果、本発明を完成した。   As a result of repeated research, the present inventors have found that each fraction obtained by fractionating rapeseed meal is excellent in bacterial growth. Completed the invention.

豊富な窒素を含んでいるにもかかわらず、菌等の培地源として利用されにくかった菜種ミールを菌等の発育に適した培地として有効に利用できるようになる。   Even though it contains abundant nitrogen, rapeseed meal, which has been difficult to be used as a medium source for bacteria and the like, can be effectively used as a medium suitable for the growth of bacteria and the like.

本明細書における篩の規格としては、Tyler標準篩を採用する。本明細書記載のメッシュとは、例えば、32メッシュは目開き0.5mm、60メッシュは目開き0.25mmである。また、例えば、50メッシュ篩上画分とは、50メッシュの篩で篩分けした後に篩に残った成分のことであり、一方50メッシュ篩下画分とは篩に残らなかった成分のことであり、32〜50メッシュ篩画分とは、32メッシュの篩で篩分けした後に篩に残らず、かつ、50メッシュの篩で篩分けした後に篩に残った成分のことである。   Tyler standard sieve is adopted as the standard of the sieve in this specification. The mesh described in the present specification is, for example, 32 mesh having an opening of 0.5 mm and 60 mesh having an opening of 0.25 mm. In addition, for example, the 50 mesh sieve fraction is a component that remains on the sieve after sieving with a 50 mesh sieve, while the 50 mesh sieve fraction is a component that does not remain on the sieve. Yes, the 32 to 50 mesh sieve fraction is a component that does not remain on the sieve after sieving with a 32 mesh sieve and remains on the sieve after sieving with a 50 mesh sieve.

菜種ミールを120メッシュよりも粗いメッシュ、より好ましくは8〜100メッシュ、さらに好ましくは32〜60メッシュの篩いで篩うことにより得られる菜種ミールを利用することで、菌の生育に優れた培地の作成が可能となる。菌の生育のために適した培地中の篩分け菜種ミールの配合割合は乾物換算で1〜99.5%である。配合量が1%よりも少ない場合には配合した効果が見られない場合があり、99.5%より多い場合には他の栄養素が不足する、あるいは菌の生育が阻害されるなどの弊害が起こる場合がある。   By using the rapeseed meal obtained by sieving the rapeseed meal with a coarser mesh than 120 mesh, more preferably 8 to 100 mesh, more preferably 32 to 60 mesh, Can be created. The blending ratio of the sieved rapeseed meal in the medium suitable for the growth of the fungus is 1 to 99.5% in terms of dry matter. If the blending amount is less than 1%, the blended effect may not be seen. If the blending amount is more than 99.5%, other nutrients may be deficient or the growth of bacteria may be inhibited. There is.

本発明による培地源は、チーズ、納豆、ヨーグルト、漬物、サイレージなどに利用され乳酸菌や納豆菌などに代表される細菌や、パン、酒、きのこ、薬剤製造などに利用されるツボカビ門、子嚢菌門、担子菌門、接合菌門、不完全菌類、などあらゆる菌類の生育に適す。粒度の細かい篩下画分については、水分が10%〜70%程度の状態で加熱殺菌処理を行うとくっついて塊ができやすい性質があり、塊ができた状態では菌の生育能力が十分に発揮できないことがあるため、固形分重量に対する水分重量の比率が3倍以上となる培地に使用するとより良い生育が得られる。粒度の粗い篩上画分については、固形分重量に対する水分重量の比率が0.1〜5倍、好ましくは0.1〜3倍となる培地においても塊ができにくく、特に菌の生育が良い特徴を持ち、サイレージや菌床用途に好適である。   The medium source according to the present invention is used for cheese, natto, yogurt, pickles, silage, and the like, and bacteria represented by lactic acid bacteria and natto bacteria, as well as bread, liquor, mushrooms, aspergillus and ascomycetes Suitable for growth of all fungi such as phylum, basidiomycetes, zygomycetes, and incomplete fungi. The fine sieving fraction has the property that when it is heated and sterilized in a state where the water content is about 10% to 70%, it tends to form clumps. Since it may not be able to be exhibited, better growth can be obtained when it is used in a medium in which the ratio of water weight to solid weight is 3 times or more. For the sieved fraction with a coarse particle size, the ratio of the moisture weight to the solid weight is 0.1 to 5 times, preferably 0.1 to 3 times in a medium that is difficult to clump, and has a particularly good growth of bacteria, Suitable for silage and fungus bed applications.

以下に、実施例および比較例を用いて、本発明をより詳細に説明する。しかし、実施例の内容が本発明の技術的範囲を限定するものではない。   Hereinafter, the present invention will be described in more detail using Examples and Comparative Examples. However, the contents of the examples do not limit the technical scope of the present invention.

(菜種ミールの篩分け)
以下に示す実施例に記載のメッシュの篩に菜種粕((株)J-オイルミルズ製)を500g載せ、手作業にて10分間篩分けした。2種類以上の篩で篩分けする場合(例えば、「32〜50メッシュ篩画分」)、上部を目の粗いメッシュの篩になるよう積み上げて、最上部に菜種粕を載せ、同様におこなった。
(Sieving rapeseed meal)
500 g of rapeseed meal (manufactured by J-Oil Mills Co., Ltd.) was placed on a mesh sieve described in the Examples below, and sieved manually for 10 minutes. When sieving with two or more types of sieves (for example, “32-50 mesh sieving fraction”), the upper part was piled up so as to become a coarse mesh sieve, and the rapeseed meal was placed on the uppermost part in the same manner. .

菜種ミールおよび、これの篩上画分、篩下画分を含む培地への菌の生育、ビタミンK2生産、ホスフォリパーゼD生産を比較する目的で、以下の操作を行った。   The following operations were carried out for the purpose of comparing rapeseed meal and the growth of fungi on the medium containing the sieving fraction and the sieving fraction, vitamin K2 production, and phospholipase D production.

(乳酸菌の培養)
日水製薬のGAMブイヨン培地を作成し、120℃、20分間滅菌処理した。この溶液10mlを120℃、20分間滅菌済みの通常菜種ミール、菜種ミール篩上画分、菜種ミール篩下画分の3種類各2gに添加してGAMブイヨン-菜種ミール培地を完成した。これにカスピ海ヨーグルト10μlを添加し、35℃にて48時間培養後、上清液の660nmの濁度を測定した。表1に示したとおり、乳酸菌の生育は菜種ミールの篩分け処理により優れたものとなった。特に篩下画分において顕著な生育向上が見られた。
(Cultivation of lactic acid bacteria)
Nissui Pharmaceutical's GAM bouillon medium was prepared and sterilized at 120 ° C. for 20 minutes. 10 ml of this solution was added to 2 g each of three types of rapeseed meal, rapeseed meal top fraction, and rapeseed meal bottom fraction sterilized at 120 ° C. for 20 minutes to complete a GAM bouillon-rapeseed meal medium. 10 μl of Caspian Sea yogurt was added thereto, and after culturing at 35 ° C. for 48 hours, the turbidity at 660 nm of the supernatant was measured. As shown in Table 1, the growth of lactic acid bacteria was improved by sieving treatment of rapeseed meal. In particular, a significant improvement in growth was observed in the subsieving fraction.

Figure 0005829728
Figure 0005829728

(納豆菌の培養)
ペプトン0.5%、酵母エキス0.25%、塩化ナトリウム0.25%の溶液を作成し、120℃、20分間滅菌処理した。この溶液10mlを120℃、20分間滅菌済みの通常菜種ミール、菜種ミール篩上画分、菜種ミール篩下画分の3種類各2gに添加して菜種ミール含有納豆菌培地を完成した。これに納豆菌培養液10μlを添加して35℃にて培養し、2日後の上清液の660nmの濁度を測定した。
納豆菌の培養結果を表2に示した。納豆菌の生育は、菜種ミールの篩分け処理により優れたものとなった。特に篩下画分において顕著な生育向上が見られた。
(Cultivation of Bacillus natto)
A solution of 0.5% peptone, 0.25% yeast extract, and 0.25% sodium chloride was prepared and sterilized at 120 ° C. for 20 minutes. 10 ml of this solution was added to 2 g each of three types of rapeseed meal, rapeseed meal top fraction, and rapeseed meal bottom fraction, which had been sterilized at 120 ° C. for 20 minutes, to complete a rapeseed meal-containing natto culture medium. To this was added 10 μl of Bacillus natto culture, and the mixture was cultured at 35 ° C., and the turbidity at 660 nm of the supernatant after 2 days was measured.
The culture results of Bacillus natto are shown in Table 2. The growth of Bacillus natto was improved by sieving treatment of rapeseed meal. In particular, a significant improvement in growth was observed in the subsieving fraction.

Figure 0005829728
Figure 0005829728

(菌類の培養)
1リットル当たりにバレイショ抽出液100gとブドウ糖10gを含む栄養源溶液を作成した。次に通常菜種ミール、菜種ミールの50メッシュ篩上画分、菜種ミールの50メッシュ篩下画分の3種類をそれぞれ30g秤量し、これに先の栄養源溶液32mlを混ぜてポテトデキストロース-菜種ミール培地とし、120℃、20分間滅菌処理を行った。この滅菌済み培地約10gずつを直径約8.5cmの滅菌シャーレ5枚に小分けし、菌1.Cladosporium cladosporioides、菌2.Eurotium repens、菌3.Penicillium roquefortii、菌4.Flammulina velutipes、菌5.Phycomyces nitensの懸濁液1mlをまき、25℃にて培養を行った。1〜4については培養開始4日後、5については培養開始翌日の生育状況を観察した。結果を図1に示した。菌類の生育は、菜種ミールの篩分け処理により優れたものとなり、特に篩上画分において顕著な生育の向上が見られた。
(Cultivation of fungi)
A nutrient solution containing 100 g of potato extract and 10 g of glucose per liter was prepared. Next, weigh 30g each of the rapeseed meal, the 50 mesh sieve fraction of rapeseed meal, and the 50 mesh sieve fraction of rapeseed meal, and mix 32 ml of the above nutrient solution with potato dextrose-rapeseed meal. The medium was sterilized at 120 ° C. for 20 minutes. About 10 g of this sterilized medium is subdivided into 5 sterilized dishes with a diameter of about 8.5 cm. Cladosporium cladosporioides, fungus 2. Eurotium repens, fungus 3. Penicillium roquefortii, fungus 4. Flammulina velutipes, fungus 5. 1 ml of a suspension of Phycomyces nitens was seeded and cultured at 25 ° C. For 1 to 4, the growth state was observed 4 days after the start of culture, and for 5 the day after the start of the culture. The results are shown in FIG. The growth of fungi was improved by sieving treatment of rapeseed meal, and a remarkable improvement in growth was observed particularly in the fraction on the sieve.

(固体培養による納豆菌のビタミンK2生産)
100gの通常菜種ミールおよび様々なメッシュサイズで篩い分けした菜種ミールを1%グリセリン含有水に浸漬後、蒸煮してから種菌(納豆菌胞子懸濁液1×108cell/ml;三浦菌)を散布し、37℃で発酵させた。発酵時間96時間とし、納豆菌によるビタミンK2(メナキノンー7)の生産量を文献(Sato et al.(2002) Br. J. Nutr. 87, 307-314)の方法に従い高速液体クロマトグラフィーで分析した。
その結果を表3に示した。固体培養での納豆菌によるビタミンK2生産は、菜種ミールを8〜100メッシュの篩で分画した篩上画分、32〜100メッシュの篩で分画した篩下画分で、菌の生育に比例して向上し、特に菜種ミール篩上画分が優れていることがわかった。120メッシュの篩下画分は十分な量が得られなかった。120メッシュ篩上画分と8メッシュ篩下画分は通常品と同等の効果となった。
(Production of vitamin K2 of Bacillus natto by solid culture)
100g of normal rapeseed meal and rapeseed meal sieved with various mesh sizes are immersed in water containing 1% glycerin and boiled, then sprayed with inoculum (natto fungal spore suspension 1 × 108cell / ml; Miura) And fermented at 37 ° C. Fermentation time was 96 hours, and the production of vitamin K2 (menaquinone-7) by Bacillus natto was analyzed by high performance liquid chromatography according to the method of literature (Sato et al. (2002) Br. J. Nutr. 87, 307-314). .
The results are shown in Table 3. Vitamin K2 production by Bacillus natto in solid culture is a sieving fraction obtained by fractionating rapeseed meal with an 8-100 mesh sieve and an undersieving fraction fractionated with a 32-100 mesh sieve. It was found that the rapeseed meal sieve fraction was particularly excellent. A sufficient amount of the sieving fraction of 120 mesh was not obtained. The 120 mesh sieve fraction and the 8 mesh sieve fraction had the same effect as the normal product.

Figure 0005829728
Figure 0005829728

(液体培養による納豆菌のビタミンK2生産)
1L中の重量が、通常菜種ミール若しくは篩分けした菜種ミール30g、グリセロール50g、シュクロース10g、K2HPO40.2gとなるように作成した培地50mlを500ml容量の坂口フラスコにいれ、オートクレーブで滅菌後、種菌(納豆菌胞子懸濁液1×108cell/ml;三浦菌)1mlを加え、37℃にて、120 strokes/minの速度で振とう培養した。培養物のビタミンK2濃度の分析結果を表4に示した。振とう培養における納豆菌によるビタミンK2生産は、菜種ミールを32〜100メッシュの篩で分画することで向上した。120メッシュの篩下画分は十分な量が得られなかった。120メッシュ篩上画分と8メッシュ篩下画分は通常品と同等の効果となった。ビタミンK2生産は、菌の生育に比例しており、菜種ミール篩下画分が特に優れていることがわかった。
(Production of vitamin K2 in natto by liquid culture)
Place 1 ml of rapeseed meal or sieved rapeseed meal 30 g, glycerol 50 g, sucrose 10 g, K2HPO 40.2 g in a 500 ml Sakaguchi flask, sterilize in an autoclave, and inoculate 1 ml of natto bacillus spore suspension (1 × 10 8 cells / ml; Miura) was added and cultured at 37 ° C. with shaking at a rate of 120 strokes / min. The results of analysis of vitamin K2 concentration in the culture are shown in Table 4. Vitamin K2 production by Bacillus natto in shaking culture was improved by fractionating rapeseed meal with a 32-100 mesh sieve. A sufficient amount of the sieving fraction of 120 mesh was not obtained. The 120 mesh sieve fraction and the 8 mesh sieve fraction had the same effect as the normal product. Vitamin K2 production was proportional to the growth of the fungus, and it was found that the rapeseed meal sieving fraction was particularly excellent.

Figure 0005829728
Figure 0005829728

(固体培養による放線菌のホスフォリパーゼD生産)
固体培養による放線菌のホスフォリパーゼD生産について調べた。放線菌は、Streptomyces lydicus D-121株とStreptomyces antibioticus S-170株(Shimbo et al. (1989) Agric. Biol. Chem. 53, 3083-3085)を使用した。100gの通常菜種ミールおよび様々なメッシュサイズで篩い分けした菜種ミールを0.5%グルコース含有水に浸漬後、蒸煮してから種菌(放線菌胞子懸濁液1×108cell/ml)を散布し、30℃で72時間静置培養した。培養後、培地10gを100mlの生理食塩水に懸濁し、1時間静置後の上澄み液のホスフォリパーゼD活性を、文献(Shimbo et al. (1989) Agric. Biol. Chem. 53, 3083-3085)の方法に従い分析した。ホスフォリパーゼD活性値は、培地1gあたりの活性で求めた(表5)。通常品と比べて、特に篩上画分において顕著にホスフォリパーゼD生産量が多くなった。120メッシュの篩下画分は十分な量が得られなかった。120メッシュ篩上画分と8メッシュ篩下画分は通常品と同等若しくはそれ以下の効果となった。このことから、固体培養での放線菌によるホスフォリパーゼD生産は菜種ミールを篩で分画することで向上することがわかった。ホスフォリパーゼDの生産は、菌の生育に比例しており、菜種ミール篩上画分が特に優れていた。
(Production of phospholipase D of actinomycetes by solid culture)
The production of actinomycete phospholipase D by solid culture was investigated. Streptomyces lydicus D-121 strain and Streptomyces antibioticus S-170 strain (Shimbo et al. (1989) Agric. Biol. Chem. 53, 3083-3085) were used as actinomycetes. 100g of normal rapeseed meal and rapeseed meal screened with various mesh sizes are immersed in water containing 0.5% glucose, then boiled and sprayed with the inoculum (actinomycete spore suspension 1 x 108cell / ml), 30 ° C For 72 hours. After culturing, 10 g of the medium was suspended in 100 ml of physiological saline, and the phospholipase D activity of the supernatant after standing for 1 hour was determined according to the literature (Shimbo et al. (1989) Agric. Biol. Chem. 53, 3083- 3085). The phospholipase D activity value was determined by the activity per gram of medium (Table 5). Compared with normal products, the amount of phospholipase D produced was significantly increased, especially in the sieve fraction. A sufficient amount of the sieving fraction of 120 mesh was not obtained. The 120-mesh sieving fraction and the 8-mesh sieving fraction were equivalent to or less than the normal product. This shows that phospholipase D production by actinomycetes in solid culture is improved by fractionating rapeseed meal with a sieve. The production of phospholipase D was proportional to the growth of the fungus, and the rapeseed meal sieve fraction was particularly excellent.

Figure 0005829728
Figure 0005829728

(液体培養における放線菌のホスフォリパーゼD生産)
放線菌は、Streptomyces lydicus D-121株とStreptomyces antibioticus S-170株(Shimbo et al. (1989) Agric. Biol. Chem. 53, 3083-3085)を使用した。表6に示した組成の培地50mlを500ml容量の坂口フラスコにいれ、オートクレーブで滅菌後、放線菌種菌1mlを加え、30℃にて、170 strokes/minの速度で振とう培養した。文献(Shimbo et al. (1989) Agric. Biol. Chem. 53, 3083-3085)の方法により培地中のホスフォリパーゼD活性を測定した結果を表7に示した。振とう培養における放線菌Streptomyces lydicus D-121株およびStreptomyces antibioticus S-170株によるホスフォリパーゼD生産は、菜種ミールを32〜100メッシュの篩で分画することで向上した。120メッシュの篩下画分は十分な量が得られなかった。120メッシュ篩上画分と8メッシュ篩下画分は通常品と同等の効果となった。ホスフォリパーゼD生産は、菌の生育に比例しており、菜種ミール篩下画分が特に優れていることがわかった。
(Production of phospholipase D of actinomycetes in liquid culture)
Streptomyces lydicus D-121 strain and Streptomyces antibioticus S-170 strain (Shimbo et al. (1989) Agric. Biol. Chem. 53, 3083-3085) were used as actinomycetes. 50 ml of a medium having the composition shown in Table 6 was placed in a 500 ml Sakaguchi flask, sterilized by autoclave, 1 ml of actinomycetes was added, and cultured at 30 ° C. at a rate of 170 strokes / min. Table 7 shows the results of measuring the phospholipase D activity in the medium by the method described in the literature (Shimbo et al. (1989) Agric. Biol. Chem. 53, 3083-3085). Phospholipase D production by Streptomyces lydicus strain D-121 and Streptomyces antibioticus strain S-170 in shake cultures was improved by fractionating rapeseed meal with a 32-100 mesh sieve. A sufficient amount of the sieving fraction of 120 mesh was not obtained. The 120 mesh sieve fraction and the 8 mesh sieve fraction had the same effect as the normal product. Phospholipase D production was proportional to the growth of the fungus, and it was found that the rapeseed meal sieving fraction was particularly excellent.

Figure 0005829728
Figure 0005829728

Figure 0005829728
Figure 0005829728

菌の生育状況を観察した結果をまとめたものである。It summarizes the results of observation of the growth of the fungus.

Claims (2)

菜種ミールを篩分けした画分であって、32〜100メッシュの篩による篩下画分をそのまま培地に含む液体培地。 A liquid medium in which a rapeseed meal is sifted and the medium is directly subjected to a sieving fraction of 32 to 100 mesh. 菜種ミールを篩分けした画分であって、8〜100メッシュの篩による篩上画分をそのまま培地に含み、前記篩上画分を固形物として含む、固体培地。 A fraction obtained by sieving rapeseed meal , wherein the sieving fraction obtained by sieving 8 to 100 mesh is directly contained in the medium, and the sieving fraction is contained as a solid matter .
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