JP6486618B2 - Powder composition containing dihydroquercetin and water-soluble dietary fiber - Google Patents
Powder composition containing dihydroquercetin and water-soluble dietary fiber Download PDFInfo
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- JP6486618B2 JP6486618B2 JP2014126770A JP2014126770A JP6486618B2 JP 6486618 B2 JP6486618 B2 JP 6486618B2 JP 2014126770 A JP2014126770 A JP 2014126770A JP 2014126770 A JP2014126770 A JP 2014126770A JP 6486618 B2 JP6486618 B2 JP 6486618B2
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- Prior art keywords
- dihydroquercetin
- water
- solubility
- mass
- dietary fiber
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- CXQWRCVTCMQVQX-LSDHHAIUSA-N (+)-taxifolin Chemical compound C1([C@@H]2[C@H](C(C3=C(O)C=C(O)C=C3O2)=O)O)=CC=C(O)C(O)=C1 CXQWRCVTCMQVQX-LSDHHAIUSA-N 0.000 title claims description 91
- XCGZWJIXHMSSQC-UHFFFAOYSA-N dihydroquercetin Natural products OC1=CC2OC(=C(O)C(=O)C2C(O)=C1)c1ccc(O)c(O)c1 XCGZWJIXHMSSQC-UHFFFAOYSA-N 0.000 title claims description 84
- 239000000203 mixture Substances 0.000 title claims description 23
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- REFJWTPEDVJJIY-UHFFFAOYSA-N Quercetin Chemical compound C=1C(O)=CC(O)=C(C(C=2O)=O)C=1OC=2C1=CC=C(O)C(O)=C1 REFJWTPEDVJJIY-UHFFFAOYSA-N 0.000 description 6
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- MWDZOUNAPSSOEL-UHFFFAOYSA-N kaempferol Natural products OC1=C(C(=O)c2cc(O)cc(O)c2O1)c3ccc(O)cc3 MWDZOUNAPSSOEL-UHFFFAOYSA-N 0.000 description 3
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- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 2
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- 239000001100 (2S)-5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one Substances 0.000 description 1
- FYGDTMLNYKFZSV-URKRLVJHSA-N (2s,3r,4s,5s,6r)-2-[(2r,4r,5r,6s)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(2r,4r,5r,6s)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1[C@@H](CO)O[C@@H](OC2[C@H](O[C@H](O)[C@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O FYGDTMLNYKFZSV-URKRLVJHSA-N 0.000 description 1
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- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
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- IVTMALDHFAHOGL-UHFFFAOYSA-N eriodictyol 7-O-rutinoside Natural products OC1C(O)C(O)C(C)OC1OCC1C(O)C(O)C(O)C(OC=2C=C3C(C(C(O)=C(O3)C=3C=C(O)C(O)=CC=3)=O)=C(O)C=2)O1 IVTMALDHFAHOGL-UHFFFAOYSA-N 0.000 description 1
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- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical compound [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 description 1
Landscapes
- Coloring Foods And Improving Nutritive Qualities (AREA)
- Non-Alcoholic Beverages (AREA)
- Medicinal Preparation (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
本発明は、ジヒドロケルセチンと水溶性食物繊維含有粉末組成物に関する。 The present invention relates to a powder composition containing dihydroquercetin and water-soluble dietary fiber.
近年フラボノイド化合物の一種であるケルセチン（クェルセチンとも表記される）の代謝物であるジヒドロケルセチンが注目されている。ジヒドロケルセチンは、ロシア東部の内陸、コルィマ地方とアニュイ地方のユカギール人や、ヴェルホヤンスク周辺のヤクート人の伝統的な冬季の食品であるカラマツ（落葉松）の樹皮をはぎ落とした形成層や木部の煮汁中に存在することが知られている。
ジヒドロケルセチンは、フェニルアラニンからケルセチンが生合成される過程の中間産物であることが知られている。ジヒドロケルセチンは、タキシフォリンとも呼ばれている。
ジヒドロケルセチンの作用効果は、活性酸素消去（特許文献１）、美白作用（特許文献２）、膀胱機能改善及び排尿障害治療（特許文献３）ウレアーゼ阻害（特許文献４）、ドライアイの軽減（特許文献５）などの用途が提案されている。
ジヒドロケルセチンの供給源としてはオウギの葉（特許文献１）、あるいはシベリア又は、ダフリアカラマツの辺材の抽出物などがある。
ジヒドロケルセチンを含む組成物は、前記のオウギの葉抽出物以外に、ナトリウム及びエタノールを含む調味料組成物（特許文献６）、ルチンを含む組成物（特許文献７）などが提案されている。
現在、ジヒドロケルセチンは、健康食品サプリメントや化粧品に広く利用されている。そしてこのような用途に適した原料としてジヒドロケルセチンを８０％以上含むシベリアカラマツ抽出物の粉末が販売されている。
しかしジヒドロケルセチンは水溶性が低く、飲料や食品に配合する場合、高濃度に溶解させることができず、取り扱いにくい性質を有している。ジヒドロケルセチンの溶解度は、温度依存性があり、２５℃で１ｍｇ／ｍｌ以下、９０℃では５２ｍｇ／ｍｌといわれている（Ｔａｘｉｆｏｌｉａ ＬＴＤホームページ参照）。
また、ジヒドロケルセチンのようなフラボノイドは、配糖体化することで水への溶解度が向上することが知られている。たとえば、特許文献８にはα−グルコシル化することで難水溶性ヘスペリジンの溶解度を改善する技術が記載されている。
In recent years, dihydroquercetin, which is a metabolite of quercetin (also referred to as quercetin), which is a kind of flavonoid compound, has attracted attention. Dihydroquercetin is a simmered layer of bark from the larch of the larch (deciduous pine), a traditional winter food of the Yukagirs of Kolyma and Anui regions in the eastern part of Russia and the Yakut people around Verhoyansk. It is known to exist inside.
Dihydroquercetin is known to be an intermediate product in the process of biosynthesis of quercetin from phenylalanine. Dihydroquercetin is also called taxifolin.
The action and effect of dihydroquercetin are: elimination of active oxygen (Patent Document 1), whitening action (Patent Document 2), improvement of bladder function and treatment of urination disorder (Patent Document 3), inhibition of urease (Patent Document 4), reduction of dry eye (Patent Applications such as literature 5) have been proposed.
Examples of the source of dihydroquercetin include ogi leaves (Patent Document 1), siberian or sapwood extract of Daphnia larch.
As the composition containing dihydroquercetin, a seasoning composition containing sodium and ethanol (Patent Document 6), a composition containing rutin (Patent Document 7), and the like have been proposed in addition to the above-mentioned extract of ogi leaves.
Currently, dihydroquercetin is widely used in health food supplements and cosmetics. As a raw material suitable for such applications, powder of Siberian larch extract containing 80% or more of dihydroquercetin is on the market.
However, dihydroquercetin has low water solubility, and cannot be dissolved at a high concentration when blended in beverages or foods, and has a property that is difficult to handle. The solubility of dihydroquercetin is temperature-dependent, and is said to be 1 mg / ml or less at 25 ° C. and 52 mg / ml at 90 ° C. (see Taxifolia LTD home page).
In addition, it is known that flavonoids such as dihydroquercetin are improved in solubility in water by glycosylation. For example, Patent Document 8 describes a technique for improving the solubility of poorly water-soluble hesperidin by α-glucosylation.
本発明は、ジヒドロケルセチンの溶解性が改善されたジヒドロケルセチン含有粉末組成物を提供することを課題とする。 An object of the present invention is to provide a dihydroquercetin-containing powder composition in which the solubility of dihydroquercetin is improved.
本発明者は、ジヒドロケルセチンの溶解性について研究を進めたところ、水に難溶性のジヒドロケルセチンの溶解性を難消化性デキストリンが改善することを見いだした。さらにこのような作用は各種水溶性食物繊維特有であることを見いだし、本発明を完成させた。 The present inventor conducted research on the solubility of dihydroquercetin and found that the hardly digestible dextrin improved the solubility of dihydroquercetin which is hardly soluble in water. Furthermore, the present inventors have found that such an action is peculiar to various water-soluble dietary fibers and completed the present invention.
本発明の主な構成は、次のとおりである。
（１）ジヒドロケルセチン１質量部あたり難消化性デキストリンを０．１〜１０質量部含む粉末組成物。
（２）２５℃における水溶液中のジヒドロケルセチンの溶解量が１ｍｇ／ｍｌ以下のジヒドロケルセチンを用い、ジヒドロケルセチンを１ｍｇ／ｍｌ以上と難消化性デキストリンを溶解含有させた水溶液であって、ジヒドロケルセチン１質量部あたり難消化性デキストリンを０．１〜１０質量部含む水溶液。
（３）飲料の形態である（２）に記載の水溶液。
（４）ジヒドロケルセチン含有組成物に、ジヒドロケルセチン１質量部あたり難消化性デキストリンを０．１〜１０質量部添加することを特徴とするジヒドロケルセチンの溶解性を改善する方法。
（５）ジヒドロケルセチン含有組成物の水溶液に、ジヒドロケルセチン１質量部あたり難消化性デキストリンを０．１〜１０質量部添加することを特徴とするジヒドロケルセチンの沈殿防止方法。
The main configuration of the present invention is as follows.
(1) A powder composition containing 0.1 to 10 parts by mass of indigestible dextrin per 1 part by mass of dihydroquercetin.
(2) dissolution of dihydroquercetin in the aqueous solution with 1mg / ml following dihydroquercetin at 25 ° C., a solution of the dihydro quercetin was contained dissolved 1mg / ml or higher and indigestible dextrin, dihydroquercetin 1 0.1 to 10 parts by mass including aqueous indigestible dextrin per part by weight.
(3) The aqueous solution as described in ( 2 ) which is a form of a drink.
(4) A method for improving the solubility of dihydroquercetin, comprising adding 0.1 to 10 parts by mass of indigestible dextrin to 1 part by mass of dihydroquercetin to a dihydroquercetin- containing composition.
(5) A method for preventing precipitation of dihydroquercetin, comprising adding 0.1 to 10 parts by mass of indigestible dextrin per 1 part by mass of dihydroquercetin to an aqueous solution of a dihydroquercetin- containing composition.
ジヒドロケルセチンの溶解性が改善した粉末組成物が提供される。また従来困難であった２５℃のジヒドロケルセチンの溶解量が１ｍｇ／ｍｌ以上である水溶液が提供される。さらにまた、本発明によりジヒドロケルセチンの水溶性の改善方法及びジヒドロケルセチンを含む水溶液におけるジヒドロケルセチンの沈殿防止方法が提供される。
また、ジヒドロケルセチンを高濃度に溶解した飲食品が提供される。
A powder composition with improved solubility of dihydroquercetin is provided. In addition, an aqueous solution having a dissolution amount of dihydroquercetin at 25 ° C. of 1 mg / ml or more, which has been difficult in the past, is provided. Furthermore, the present invention provides a method for improving the water solubility of dihydroquercetin and a method for preventing precipitation of dihydroquercetin in an aqueous solution containing dihydroquercetin.
Moreover, the food / beverage products which melt | dissolved dihydroquercetin in high concentration are provided.
本発明は、ジヒドロケルセチンと水溶性食物繊維を含有する粉末組成物に係る発明である。
本発明に用いるジヒドロケルセチンは、ケルセチンの２位および３位に水素が添加された、下記構造式（１）（平面構造式）で表される化合物である。２位および３位の立体配置により４種類の立体異性体が存在するが、本発明においてはすべての立体異性体およびその混合物を包含する。
The present invention relates to a powder composition containing dihydroquercetin and water-soluble dietary fiber.
Dihydroquercetin used in the present invention is a compound represented by the following structural formula (1) (planar structural formula) in which hydrogen is added to the 2nd and 3rd positions of quercetin. There are four types of stereoisomers depending on the configuration at the 2- and 3-positions, but in the present invention, all stereoisomers and mixtures thereof are included.
ジヒドロケルセチンについては、背景技術に説明したようにシベリア又は、ダフリアカラマツの辺材から抽出されたジヒドロケルセチンを成分として含む組成物が一般に市販、流通しており、これを本発明に用いることができる。この組成物はジヒドロケルセチンを８０％以上含むものである。また、特許文献１（特開平６−６５０７４号公報）に開示されたオウギの葉から抽出されたフラボノ配糖体混合物から分離されたタキシフォリンを用いることもできる。
ジヒドロケルセチンは、油溶性の化合物であり、水にはわずかしか溶解しない。ジヒドロケルセチンの溶解度は温度依存性があり、２５℃における溶解度は１ｍｇ／ｍｌ以下、９０℃における溶解度は５２ｍｇ／ｍｌである。
As for dihydroquercetin, as described in the background art, a composition containing dihydroquercetin extracted from siberia or dafria larch sapwood as a component is generally commercially available and distributed, and this can be used in the present invention. it can. This composition contains 80% or more of dihydroquercetin. In addition, taxifolin isolated from a flavonoglycoside mixture extracted from leaves of Japanese oak disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 6-65074) can also be used.
Dihydroquercetin is an oil-soluble compound and is only slightly soluble in water. The solubility of dihydroquercetin is temperature-dependent, the solubility at 25 ° C. is 1 mg / ml or less, and the solubility at 90 ° C. is 52 mg / ml.
ジヒドロケルセチンを水溶液とする際には、加熱して溶解することで、９０℃の溶解度を５２ｍｇ／ｍｌとすることができる。しかし、この水溶液は温度が低下するとジヒドロケルセチンが析出してしまう。また市販されているシベリアカラマツから抽出したジヒドロケルセチン含有組成物は約９０％（規格８８％以上）のジヒドロケルセチンを含有している粉末（商品名：ラビトール 株式会社アメティス）である。この粉末の水への溶解性はきわめて低く、精製されたタキシフォリンの２５℃の溶解度である１ｍｇ／ｍｌよりもさらに低い。
この粉末のジヒドロケルセチン１質量部あたり水溶性食物繊維の粉末を０．１〜１０質量部を均質に混合することで、当該粉末を溶解すると粉末中のジヒドロケルセチンの２５℃における溶解度をジヒドロケルセチンのみを溶解させる場合に比して１．３〜４倍の濃度に改善することができる。
なお、水溶性食物繊維の配合量が０．１質量部以下の場合、溶解性改善効果がなく１０質量％を超えるとジヒドロケルセチンの溶解度が頭打ちとなってしまう。
When dihydroquercetin is used as an aqueous solution, the solubility at 90 ° C. can be adjusted to 52 mg / ml by heating and dissolving. However, dihydroquercetin precipitates in this aqueous solution when the temperature is lowered. The dihydroquercetin-containing composition extracted from commercially available Siberian larch is a powder (trade name: Rabitol Ametis Co., Ltd.) containing about 90% (standard 88% or more) of dihydroquercetin. The solubility of this powder in water is very low, even lower than 1 mg / ml, which is the solubility of purified taxifolin at 25 ° C.
When 0.1 to 10 parts by mass of water-soluble dietary fiber powder is homogeneously mixed per 1 part by mass of dihydroquercetin in this powder, when the powder is dissolved, the solubility of dihydroquercetin in the powder at 25 ° C. is only dihydroquercetin. The concentration can be improved to 1.3 to 4 times as compared with the case of dissolving the.
In addition, when the compounding quantity of a water-soluble dietary fiber is 0.1 mass part or less, when there is no solubility improvement effect and exceeds 10 mass%, the solubility of dihydroquercetin will reach a peak.
本発明で言う水溶性食物繊維としては、グアー豆酵素分解物、グルコマンナン、βグルカン、難消化性デキストリン、難消化性グルカン、ポリデキストロース、イヌリン、アガロース、アルギン酸ナトリウム 、カラギーナン、フコイダン、ポルフィラン、ラミナラン、アラビノガラクタンを例示できる。好ましくは難消化性デキストリン、ポリデキストロース、特に好ましく、難消化性デキストリンが特に好ましい。また広義の水溶性食物繊維である環状構造を持つ高分子デキストリン（商品名：クラスターデキストリン）やシクロデキストリンも本発明に用いることができる。 Examples of the water-soluble dietary fiber in the present invention include guar bean enzyme degradation product, glucomannan, β-glucan, indigestible dextrin, indigestible glucan, polydextrose, inulin, agarose, sodium alginate, carrageenan, fucoidan, porphyran, laminaran And arabinogalactan. Indigestible dextrin and polydextrose are particularly preferred, and indigestible dextrin is particularly preferred. Polymer dextrin having a cyclic structure (trade name: cluster dextrin) and cyclodextrin, which are water-soluble dietary fibers in a broad sense, can also be used in the present invention.
本発明のジヒドロケルセチン及び水溶性食物繊維を含む粉末組成物は、水溶液又は飲料などの水媒体に溶解したとき、水溶液中に溶解するジヒドロケルセチンの２５℃の濃度を１ｍｇ／ｍｌ以上にすることができる。またジヒドロケルセチンの濃度を最高で同じく２５℃で４ｍｇ／ｍｌとすることができる。 When the powder composition containing dihydroquercetin and water-soluble dietary fiber of the present invention is dissolved in an aqueous solution or an aqueous medium such as a beverage, the concentration of dihydroquercetin dissolved in the aqueous solution may be 1 mg / ml or more at 25 ° C. it can. Also, the concentration of dihydroquercetin can be set to 4 mg / ml at the same maximum at 25 ° C.
さらにまた、ジヒドロケルセチンを高濃度に加温溶解した水溶液又は飲料中に水溶性食物繊維を溶解したジヒドロケルセチンの１質量部あたり０．１〜１０質量部添加して、撹拌し溶解させることにより、室温（２５℃）に液温が低下しても、水溶液又は飲料中にジヒドロケルセチンが析出することを抑制することができる。 Furthermore, by adding 0.1 to 10 parts by mass per 1 part by mass of dihydroquercetin in which water-soluble dietary fiber is dissolved in an aqueous solution or beverage in which dihydroquercetin is heated and dissolved at a high concentration, the mixture is stirred and dissolved. Even if the liquid temperature falls to room temperature (25 ° C.), it is possible to suppress the precipitation of dihydroquercetin in an aqueous solution or beverage.
以下に本発明の効果を確認した試験例を示し、本発明をさらに具体的に説明する。 Test examples confirming the effects of the present invention will be shown below, and the present invention will be described more specifically.
試験例
＜試験例１：ジヒドロケルセチンの溶解度の指標としての吸光度測定（予備試験）＞
ジヒドロケルセチンの溶解度の指標として吸光度を使用可能か否か評価した。
１．試験方法
ジヒドロケルセチンの水溶液は黄色透明な水溶液となる。15mL遠沈管にジヒドロケルセチン（ジクベルチン：株式会社ＤＨＱ）及び難消化性デキストリン（ファイバーソル２：松谷化学工業株式会社製）を秤量し、蒸留水を5gとなるように加えた。転倒混和したのち、卓上超音波洗浄機(SHARP社製 UT-205)で10分間ソニケーションした後、25℃で1時間保温した。
HITACHI社製Himac CT6Dを使用し、3000rpmで10分間遠心分離した後、上清を2mLマイクロチューブ（エッペンドルフ社製）に移し、16200Gで10分間超遠心分離した(HITACHI社製CF15RXII)。上清を新しいマイクロチューブに移し、SHIMADZU社製UV-2450で波長400nmから200nmの波長域の吸光度を測定し、スペクトログラフィーを得た。
Test Example <Test Example 1: Absorbance measurement as an index of solubility of dihydroquercetin (preliminary test)>
It was evaluated whether absorbance can be used as an index of solubility of dihydroquercetin.
1. Test Method An aqueous solution of dihydroquercetin is a yellow transparent aqueous solution. Dihydroquercetin (Dicubin: DHQ) and indigestible dextrin (Fibersol 2: manufactured by Matsutani Chemical Industry Co., Ltd.) were weighed into a 15 mL centrifuge tube, and distilled water was added to 5 g. After mixing by inversion, sonication was performed for 10 minutes with a tabletop ultrasonic cleaner (UT-205 manufactured by SHARP), and the mixture was kept at 25 ° C. for 1 hour.
After HITACHI Himac CT6D was used and centrifuged at 3000 rpm for 10 minutes, the supernatant was transferred to a 2 mL microtube (Eppendorf) and ultracentrifuged at 16200G for 10 minutes (HITACHI CF15RXII). The supernatant was transferred to a new microtube, and the absorbance in the wavelength range from 400 nm to 200 nm was measured with a UV-2450 manufactured by SHIMADZU to obtain a spectrograph.
２．結果
図１にジヒドロケルセチンを定量とし、難消化性デキストリンを増加させた際に得られるスペクトロメトリーを示す。
難消化性デキストリンによって溶解性が上昇し、吸光度が上昇することが確認できた。
2. Results FIG. 1 shows the spectrometry obtained when dihydroquercetin is used as a quantitative amount and the indigestible dextrin is increased.
It was confirmed that the solubility increased by the hardly digestible dextrin and the absorbance increased.
＜試験例２：ジヒドロケルセチンの溶解性改善試験＞
１．試験方法
ジヒドロケルセチン（ジクベルチン：株式会社ＤＨＱ）、難消化性デキストリン（ファイバーソル２：松谷化学工業株式会社製）を用いてジヒドロケルセチンの溶解度に及ぼす難消化性デキストリンの効果を評価した。
下記表１の比率でジヒドロケルセチンと難消化性デキストリンの粉末を混合し、予備試験と同様にして試験溶液を調整し、400〜200nmの波長で吸光度を測定した。
<Test Example 2: Dihydroquercetin solubility improvement test>
1. Test Method The effect of indigestible dextrin on the solubility of dihydroquercetin was evaluated using dihydroquercetin (Dicubertin: DHQ) and indigestible dextrin (Fibersol 2: manufactured by Matsutani Chemical Industry Co., Ltd.).
Dihydroquercetin and indigestible dextrin powder were mixed at the ratio shown in Table 1 below, and the test solution was prepared in the same manner as in the preliminary test, and the absorbance was measured at a wavelength of 400 to 200 nm.
難消化性デキストリンを含まない場合の溶液の極大波長における吸光度比を１とし、難消化性デキストリン添加した際の相対吸光度（吸光度比）を求めた。 The relative absorbance (absorbance ratio) when the indigestible dextrin was added was determined with the absorbance ratio at the maximum wavelength of the solution without the indigestible dextrin being 1.
２．結果
表１に示すとおり難消化性デキストリンを含まない場合を１とすると難消化性デキストリンの添加量が増大するにつれ、溶解度が上昇した。２５℃の温度での水へのジヒドロケルセチンの溶解度は１ｍｇ／ｍｌとされている。難消化性デキストリンを添加することで、無添加の４倍量、４ｍｇ／ｍｌの濃度のジヒドロケルセチン水溶液を得ることができた。
2. Results As shown in Table 1, when the case where the indigestible dextrin was not included was 1, the solubility increased as the amount of the indigestible dextrin increased. The solubility of dihydroquercetin in water at a temperature of 25 ° C. is 1 mg / ml. By adding the non-digestible dextrin, it was possible to obtain a dihydroquercetin aqueous solution having a concentration of 4 mg / ml and 4 times the amount without addition.
＜試験例３：各種多糖類のジヒドロケルセチンの溶解度に及ぼす効果＞
１．試験方法
水溶性食物繊維として試験例１、２に用いた難消化性デキストリン（ファイバーソル２：松谷化学工業株式会社製）とは平均分子量の異なる難消化性デキストリン（パインファイバーＣ：松谷化学株式会社製）、ポリデキスロース（スターライトＩＩＩ：Ｔａｔｅ＆Ｌｙｌｅ製）、アラビノガラクタン（レジスエイド：ロンザジャパン製）、環状構造を持つ高分子デキストリン（クラスターデキストリン：グリコ栄養食品株式会社製）、非水溶性食物繊維としてセルロース（セオラスFD-301：旭化成株式会社製）、トウモロコシ澱粉（コーンスターチ：松谷化学工業株式会社製）、α−シクロデキストリン（ＣＡＶＡＭＡＸ（登録商標）ｗ６：株式会社シクロケム）それぞれ１２５ｍｇをジヒドロケルセチン粉末（ジクベルチン）１２５ｍｇに粉混合した。それぞれの粉末を15mL遠沈管採取し、蒸留水を5gとなるように加えた。転倒混和したのち、卓上超音波洗浄機(SHARP社製 UT-205)で10分間ソニケーションした後、25℃で1時間保温した。次いで、HITACHI社製Himac CT6Dを使用し、3000rpmで10分間遠心分離した後、上清を2mLマイクロチューブ（エッペンドルフ社製）に移し、16200Gで10分間超遠心分離した(HITACHI社製CF15RXII)。上清を新しいマイクロチューブに移し、SHIMADZU社製UV-2450で400〜200nmの波長域の吸光度を測定し、試験例1と同様にジヒドロケルセチンの溶解性を試験した。
<Test Example 3: Effects of various polysaccharides on the solubility of dihydroquercetin>
1. Test Method Indigestible dextrin (Pine Fiber C: Matsutani Chemical Co., Ltd.) having a different average molecular weight from the indigestible dextrin (Fibersol 2: manufactured by Matsutani Chemical Co., Ltd.) used in Test Examples 1 and 2 as a water-soluble dietary fiber ), Polydexulose (Starlite III: manufactured by Tate & Lyle), arabinogalactan (Regisade: manufactured by Lonza Japan), polymer dextrin having a cyclic structure (cluster dextrin: manufactured by Glico Nutrition Foods Co., Ltd.), water-insoluble dietary fiber Cellulose (Ceorus FD-301: manufactured by Asahi Kasei Co., Ltd.), corn starch (corn starch: manufactured by Matsutani Chemical Industry Co., Ltd.), α-cyclodextrin (CVAMAX (registered trademark) w6: cyclochem) 125 mg each of dihydroquercetin powder ( Jikbertin) 12 Was powder mixed in mg. Each powder was collected from a 15 mL centrifuge tube, and distilled water was added to 5 g. After mixing by inversion, sonication was performed for 10 minutes with a tabletop ultrasonic cleaner (UT-205 manufactured by SHARP), and the mixture was kept at 25 ° C. for 1 hour. Next, after HITACHI Himac CT6D was used and centrifuged at 3000 rpm for 10 minutes, the supernatant was transferred to a 2 mL microtube (Eppendorf) and ultracentrifuged at 16200 G for 10 minutes (CF15RXII from HITACHI). The supernatant was transferred to a new microtube, and the absorbance in the wavelength region of 400 to 200 nm was measured with SHIMADZU UV-2450, and the solubility of dihydroquercetin was tested in the same manner as in Test Example 1.
２．結果
試験結果を表２に示す。
2. Results Table 2 shows the test results.
水溶性食物繊維である難消化性デキストリン、環状高分子デキストリン（クラスターデキストリン）、シクロデキストリン、アラビノガラクタン、ポリデキストロースはジヒドロケルセチンの溶解性を改善した。しかし非水溶性食物繊維であるセルロース及び非食物繊維のトウモロコシ澱粉はジヒドロケルセチンの溶解性を悪化させた。
以上の試験１〜３により、水溶性食物繊維はジヒドロケルセチンの水への溶解性を改善することが明らかとなった。またジヒドロケルセチンの溶解性は、水溶性食物繊維の混合量に応じて改善することが判明した。
Insoluble digestive dextrin, cyclic polymer dextrin (cluster dextrin), cyclodextrin, arabinogalactan, and polydextrose, which are water-soluble dietary fibers, improved the solubility of dihydroquercetin. However, the water-insoluble dietary fiber cellulose and non-dietary fiber corn starch exacerbated the solubility of dihydroquercetin.
From the above tests 1 to 3, it became clear that water-soluble dietary fiber improves the solubility of dihydroquercetin in water. It was also found that the solubility of dihydroquercetin improves with the amount of water-soluble dietary fiber mixed.
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