JP3414954B2 - Low strength agar and method for producing the same - Google Patents
Low strength agar and method for producing the sameInfo
- Publication number
- JP3414954B2 JP3414954B2 JP30673396A JP30673396A JP3414954B2 JP 3414954 B2 JP3414954 B2 JP 3414954B2 JP 30673396 A JP30673396 A JP 30673396A JP 30673396 A JP30673396 A JP 30673396A JP 3414954 B2 JP3414954 B2 JP 3414954B2
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- Japan
- Prior art keywords
- agar
- strength
- heat treatment
- low
- producing low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Edible Seaweed (AREA)
- Jellies, Jams, And Syrups (AREA)
- Formation And Processing Of Food Products (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】この発明は、低強度寒天とそ
の製造方法に関する。TECHNICAL FIELD The present invention relates to low-strength agar and a method for producing the same.
【０００２】[0002]
【従来の技術】寒天の性質を示す一つのパラメータとし
てゼリー強度がある。通常、工業的製法で作られる粉末
寒天やフレーク寒天では、ゼリー強度（日寒水式、寒天
濃度１．５％）は４００ｇ／ｃｍ2以上であり、天然寒
天と呼ばれる角寒天や糸寒天では、２５０〜４００ｇ／
ｃｍ2である。この様な寒天を、スプレッド食品や化粧
品その他、低ゼリー強度が要求される用途に用いる場合
には、寒天濃度を下げてゼリー強度を下げることが必要
となる。しかし、寒天濃度を下げると離水が生じ易く、
ボディ感も失われる。2. Description of the Related Art Jelly strength is one of the parameters indicating the properties of agar. Generally, powdered agar and flake agar produced by an industrial production method have a jelly strength (day-agar water type, agar concentration of 1.5%) of 400 g / cm 2 or more, and horn agar or thread agar called natural agar has 250 or less. ~ 400g /
cm 2 . When such agar is used for spread foods, cosmetics and other applications requiring low jelly strength, it is necessary to lower the agar concentration to lower the jelly strength. However, if the concentration of agar is lowered, syneresis tends to occur,
The body feeling is also lost.
【０００３】そこで本出願人は、先に、寒天濃度を下げ
ることなく低ゼリー強度が得られるようにした低強度寒
天とその製造方法を提案している（特願平４−１４８８
５５号）。この低強度寒天は、寒天製造工程の適当な段
階で酸処理により寒天分子を分解切断する事により得ら
れる。Therefore, the present applicant has previously proposed a low-strength agar capable of obtaining a low jelly strength without lowering the agar concentration and a method for producing the same (Japanese Patent Application No. 4-1488).
55). This low-strength agar can be obtained by decomposing and cutting agar molecules by acid treatment at an appropriate stage in the agar production process.
【０００４】[0004]
【発明が解決しようとする課題】しかし、酸処理により
寒天分子を切断して低強度寒天を得る方法には、解決す
べきいくつかの不都合が付随する。第１に、酸処理法で
は、ある種の原料海藻、特にオバクサに対して分解速度
が遅い。速い分解速度を得るためには、低ｐＨ域での処
理が必要になり、多量の酸を必要とするばかりか、その
後の中和処理のために多量のアルカリまたはアルカリ塩
を必要とする。中和処理により作られる塩の除去も簡単
ではない。第２に、酸処理により得られる低強度寒天
は、分解分子の末端基に還元糖ができ易く、メーラード
反応を起こし易い。このため例えば、高糖度の寒天ゼリ
ーを高温（例えば１００℃以上）で加熱したり、或いは
蛋白を加えたときに着色が生じる。また還元糖がある
と、ミルクゼリーを作った場合、ミルク蛋白と反応とし
て滑らかさを失ってざらつきが発生する。However, the method of cleaving agar molecules by acid treatment to obtain low-strength agar is accompanied by some inconveniences to be solved. First, the acid treatment method has a slow decomposition rate with respect to some raw material seaweeds, especially for corn. In order to obtain a high decomposition rate, treatment in a low pH range is required, which requires not only a large amount of acid but also a large amount of alkali or alkali salt for the subsequent neutralization treatment. The removal of the salt produced by the neutralization process is not easy either. Secondly, the low-strength agar obtained by the acid treatment is liable to form a reducing sugar at the terminal group of the degrading molecule, which easily causes the Maillard reaction. Therefore, for example, coloring occurs when agar jelly having a high sugar content is heated at a high temperature (for example, 100 ° C. or higher) or protein is added. In addition, if reducing sugar is present, when milk jelly is made, it reacts with milk protein, loses smoothness, and becomes rough.
【０００５】この発明は、上記事情を考慮してなされた
もので、酸処理により生じる不都合を回避できるように
した低強度寒天とその製造方法を提供することを目的と
している。The present invention has been made in view of the above circumstances, and an object thereof is to provide a low-strength agar and a method for producing the same, which can avoid the disadvantage caused by the acid treatment.
【０００６】[0006]
【課題を解決するための手段】この発明に係る低強度寒
天は、熱処理によって寒天成分の分子が切断されて、ゼ
リー強度が１．５％寒天濃度で１０〜２５０ｇ／ｃｍ2
の範囲に調整されていることを特徴としている。The low-strength agar according to the present invention has a jelly strength of 10 to 250 g / cm 2 at agar concentration of 1.5% because the molecules of the agar component are cleaved by heat treatment.
It is characterized by being adjusted to the range of.
【０００７】この発明に係る低強度寒天の製造方法は、
原料海藻から寒天成分を抽出する工程と、この工程で得
られた抽出液を濾過する工程と、この工程で得られた濾
過液をゲル化させ、得られたゲルを脱水処理する工程
と、この工程で得られた濃縮ゲルを乾燥する工程と、上
記各工程のうちいずれか一の工程の後に熱処理を行って
寒天分子を切断する熱処理工程とを有することを特徴と
している。The method for producing low-strength agar according to the present invention is
A step of extracting the agar component from the raw seaweed, a step of filtering the extract obtained in this step, gelling the filtrate obtained in this step, and a step of dehydrating the obtained gel, and It is characterized in that it has a step of drying the concentrated gel obtained in the step and a heat treatment step of cutting the agar molecule by performing heat treatment after any one of the above steps.
【０００８】この発明において好ましくは、前記熱処理
工程は、前記乾燥工程後に、粉砕された乾燥寒天に対し
て、ダイプレート温度９０〜１８０℃，圧力７〜１５Ｍ
Ｐａの条件下で行う。この場合更に好ましくは、粉砕さ
れた乾燥寒天に対して、水を加えた加湿状態で熱処理を
行う。また前記熱処理工程は、前記抽出液，前記濾過
液，前記濃縮ゲルを再溶解した液のいずれかに対して、
同様の条件で行うことができる。具体的に前記熱処理工
程は、エクストルーダーにより行う。In the present invention, preferably, in the heat treatment step, after the drying step, the die plate temperature is 90 to 180 ° C. and the pressure is 7 to 15 M with respect to the crushed dried agar.
It is performed under the condition of Pa. In this case, more preferably, the crushed dry agar is subjected to heat treatment in a humidified state with water added. Further, the heat treatment step, for any of the extract, the filtrate, and the redissolved solution of the concentrated gel,
It can be performed under similar conditions. Specifically, the heat treatment step is performed by an extruder.
【０００９】この発明によると、寒天分子切断のために
多量の酸を必要とせず、従って中和処理のための多量の
アルカリも必要とせず、簡単な処理で低強度寒天を得る
ことができ、低強度寒天の低コスト化が可能となる。ま
た、酸処理に依らないため、分子末端基に多くの還元糖
ができることがなく、加熱による着色やミルク蛋白との
反応によるざらつきの発生等も防止される。According to the present invention, a large amount of acid is not required for agar molecule cleavage, and thus a large amount of alkali is not required for neutralization treatment, and low-strength agar can be obtained by a simple treatment. The cost of low-strength agar can be reduced. Further, since it does not depend on the acid treatment, a large amount of reducing sugar is not formed in the molecular end group, and coloring due to heating and occurrence of roughness due to reaction with milk protein are prevented.
【００１０】[0010]
【発明の実施の形態】以下、図面を参照して、この発明
の実施例を説明する。図１は、この発明の一実施例によ
る低強度寒天の製造工程を示す。寒天原料である海藻、
例えばオバクサを必要に応じてアルカリ処理する工程
１、処理された海藻から寒天成分を抽出する工程２、こ
の工程で得られた抽出液を濾過する工程３、この工程で
得られた濾過液をゲル化させる工程４、この工程で得ら
れたゲルを冷凍融解またはプレス等により脱水処理する
工程５、及びこの工程で得られた濃縮ゲルを乾燥する工
程６により、通常の寒天が得られる。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a manufacturing process of low-strength agar according to an embodiment of the present invention. Seaweed, which is a raw material for agar,
For example, if necessary, step 1 of alkali treatment of Oleaceae, step 2 of extracting agar components from the treated seaweed, step 3 of filtering the extract obtained in this step, gel of the filtrate obtained in this step Ordinary agar is obtained by the step 4 of liquefying, the step 5 of dehydrating the gel obtained in this step by freeze-thawing or pressing, and the step 6 of drying the concentrated gel obtained in this step.
【００１１】この実施例では、工程６で得られた乾燥寒
天を粉砕し、この粉末寒天に対して熱処理を行う熱処理
工程７を追加している。熱処理工程７は、粉末寒天に水
を加えて加湿状態とし、全体に均等に且つ短時間で熱処
理を加えるため、１軸または２軸のエクストルーダーを
利用する。具体的に実施例では、２軸のエクストルーダ
ー（（株）栗本鐵工所社製）を用いた。エクストルーダ
ーによる熱処理の条件は、ダイプレートの温度９０〜１
８０℃、圧力７〜１５ＭＰａとし、処理時間は２０〜６
０秒とする。In this embodiment, a heat treatment step 7 in which the dried agar obtained in step 6 is crushed and the powder agar is heat treated is added. In the heat treatment step 7, a uniaxial or biaxial extruder is used in order to add water to the powdered agar to bring it into a humidified state and to uniformly heat the whole in a short time. Specifically, in the examples, a twin-screw extruder (manufactured by Kurimoto Iron Works Co., Ltd.) was used. The condition of the heat treatment by the extruder is that the die plate temperature is 90 to 1
80 ° C., pressure 7 to 15 MPa, treatment time 20 to 6
0 seconds.
【００１２】以上のような条件で、エクストルーダーに
より加湿状態の粉末寒天に熱処理を加えることにより、
ゼリー強度が１．５％寒天濃度で１０〜２５０ｇ／ｃｍ
2の範囲に入る低強度寒天が得られる。熱処理条件が上
記の範囲を外れると、例えば温度，圧力が十分でない
と、低分子化されず、また温度，圧力が高すぎると低分
子化されすぎる。[0012] Under the above-mentioned conditions, by heat-treating the powdered agar in a humidified state with an extruder,
Jelly strength is 10-250g / cm at 1.5% agar concentration
A low-strength agar in the range of 2 can be obtained. If the heat treatment conditions are out of the above range, for example, if the temperature and pressure are not sufficient, the molecular weight is not lowered, and if the temperature and pressure are too high, the molecular weight is lowered too much.
【００１３】上記実施例では、通常の工程で得られる粉
末寒天に対して熱処理を加えたが、図１の製造工程の他
の適当な段階で熱処理を加えることができる。例えば、
図２は、抽出工程２で得られた抽出液に熱処理工程７を
加える実施例であり、場合により抽出工程２と熱処理工
程７は同時に行うことができる。図３は、濾過工程３で
得られた濾過された清澄液に熱処理工程７を加える実施
例である。図４は、脱水工程５で得られた濃縮ゲルに対
して熱処理工程７を加える実施例である。これらの実施
例でも、先の実施例と同様の熱処理条件として、同様に
低強度寒天を得ることができる。In the above embodiment, the heat treatment was applied to the powder agar obtained by the usual process, but the heat treatment can be applied at another suitable stage of the manufacturing process of FIG. For example,
FIG. 2 shows an example in which the heat treatment step 7 is added to the extraction liquid obtained in the extraction step 2, and in some cases, the extraction step 2 and the heat treatment step 7 can be performed simultaneously. FIG. 3 is an example in which the heat treatment step 7 is added to the filtered clarified liquid obtained in the filtration step 3. FIG. 4 is an example in which the heat treatment step 7 is added to the concentrated gel obtained in the dehydration step 5. In these examples as well, low-strength agar can be obtained under the same heat treatment conditions as in the previous examples.
【００１４】具体的に、図１の実施例で得られた低強度
寒天について、還元糖の出来易さを調べる目的でフェー
リング試験を行った。その結果を、比較例と共に下記表
１に示す。Specifically, the low strength agar obtained in the example of FIG. 1 was subjected to a Fehling test for the purpose of examining the easiness of producing reducing sugar. The results are shown in Table 1 below together with the comparative examples.
【００１５】[0015]
【表１】 [Table 1]
【００１６】表１の分解前寒天は、図１の工程１〜６に
より得られた通常の寒天、酸処理による低強度寒天は図
１の工程１〜６により得られた寒天に酸処理を行って実
施例と同程度のゼリー強度の低強度寒天としたものであ
る。表１の“＋”の数はフェーリング反応の強さ、即ち
還元糖の多さを表す。通常寒天及び実施例の低強度寒天
では、還元糖がほんの僅かに認められるのみであり、酸
処理による低強度寒天では多量の還元糖の存在が確認さ
れた。The agar before decomposition shown in Table 1 is the normal agar obtained by the steps 1 to 6 in FIG. 1, and the low-strength agar obtained by the acid treatment is the agar obtained by the steps 1 to 6 in FIG. The low-strength agar has a jelly strength similar to that of the example. The number of "+" in Table 1 indicates the strength of the Fehling reaction, that is, the number of reducing sugars. Only a small amount of reducing sugar was observed in the normal agar and the low-strength agar of Examples, and the presence of a large amount of reducing sugar was confirmed in the low-strength agar treated with an acid.
【００１７】また、実施例で得られた低強度寒天を用い
て、牛乳５０％，砂糖１５％を加えてミルクゼリーを作
り、乳蛋白反応を調べた結果を、比較例と共に下記表２
に示す。Using the low-strength agar obtained in the example, milk jelly was prepared by adding 50% milk and 15% sugar, and the milk protein reaction was examined.
Shown in.
【００１８】[0018]
【表２】 [Table 2]
【００１９】表２の“−”は、有意な反応が認められな
いことを示し、“＋”の数は反応の強さを表す。酸処理
による低強度寒天を用いた場合、凝集，分離が認められ
たのに対し、分解前の寒天及び実施例の寒天では、凝
集，分離のない滑らかなミルクゼリーが得られた。図５
（ａ），（ｂ）及び（ｃ）はそれぞれ上述した分解前寒
天，酸処理による低強度寒天及び実施例による低強度寒
天によるミルクゼリーについての走査型電子顕微鏡によ
る写真である。酸処理による低強度寒天では明らかに寒
天分子と乳蛋白との反応による不均一状態が認められ
た。"-" In Table 2 indicates that no significant reaction was observed, and the number of "+" indicates the strength of the reaction. Aggregation and separation were observed when low-strength agar treated with an acid was used, whereas smooth milk jelly without aggregation and separation was obtained from the agar before decomposition and the agar of the examples. Figure 5
(A), (b) and (c) are scanning electron microscope photographs of the above-described pre-decomposition agar, low-strength agar by acid treatment and milk jelly by low-strength agar according to Examples. In low-strength agar treated with acid, a heterogeneous state was clearly observed due to the reaction between agar molecules and milk proteins.
【００２０】なおこの発明は上記実施例に限られない。
例えばこの発明においても、酸処理を補助的に用いるこ
とを妨げるものではない。具体的には、エクストルーダ
ーによる熱処理工程で同時に酸を加えて酸処理を併用す
る。この様にすれば、寒天分子の切断を加速することが
でき、処理時間の短縮が図られる。但し酸処理は、上述
した不都合が生じない範囲であくまでも補助的に用いる
ことが必要である。The present invention is not limited to the above embodiment.
For example, even in the present invention, the auxiliary use of acid treatment is not prevented. Specifically, an acid treatment is used in combination with an acid at the same time in a heat treatment process using an extruder. By doing so, the cleavage of agar molecules can be accelerated, and the processing time can be shortened. However, it is necessary that the acid treatment is used as an auxiliary insofar as the above-mentioned inconvenience does not occur.
【００２１】[0021]
【発明の効果】以上述べたようにこの発明によれば、寒
天分子切断のための多量の酸やその後の中和処理のため
の多量のアルカリを必要とせず、熱処理によって簡単に
低強度寒天を得ることができ、しかも酸処理に依らない
ため、多くの還元糖ができることがなく、着色進行やミ
ルク蛋白との反応が抑制される寒天が得られる。As described above, according to the present invention, a large amount of acid for agar molecule cleavage and a large amount of alkali for the subsequent neutralization treatment are not required, and low-strength agar can be easily obtained by heat treatment. Since agar which can be obtained and does not depend on acid treatment, a large amount of reducing sugar is not produced, and agar is obtained in which the progress of coloring and the reaction with milk protein are suppressed.
【図１】 この発明の一実施例による低強度寒天の製造
工程を示す。FIG. 1 shows a manufacturing process of low-strength agar according to an embodiment of the present invention.
【図２】 他の実施例による低強度寒天の製造工程を示
す。FIG. 2 shows a manufacturing process of low-strength agar according to another embodiment.
【図３】 他の実施例による低強度寒天の製造工程を示
す。FIG. 3 shows a manufacturing process of low-strength agar according to another embodiment.
【図４】 他の実施例による低強度寒天の製造工程を示
す。FIG. 4 shows a manufacturing process of low-strength agar according to another embodiment.
【図５】 実施例及び比較例の寒天を用いたミルクゼリ
ーの電子顕微鏡写真である。FIG. 5 is an electron micrograph of milk jelly using agar of Examples and Comparative Examples.
１…アルカリ処理工程、２…抽出工程、３…濾過工程、
４…ゲル化工程、５…脱水工程、６…乾燥工程、７…熱
処理工程。1 ... Alkali treatment step, 2 ... Extraction step, 3 ... Filtration step,
4 ... Gelation step, 5 ... Dehydration step, 6 ... Drying step, 7 ... Heat treatment step.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) A23L 1/337 101 A23L 1/0532 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) A23L 1/337 101 A23L 1/0532
Claims (6)
れて、ゼリー強度が１．５％寒天濃度で１０〜２５０ｇ
／ｃｍ2の範囲に調整されていることを特徴とする低強
度寒天。1. A molecule of an agar component is cleaved by heat treatment so that the jelly strength is 10 to 250 g at a concentration of 1.5% agar.
Low-strength agar characterized by being adjusted to the range of / cm 2 .
この工程で得られた抽出液を濾過する工程と、この工程
で得られた濾過液をゲル化させ、得られたゲルを脱水処
理する工程と、この工程で得られた濃縮ゲルを乾燥する
工程と、上記各工程のうちいずれか一の工程の後に熱処
理を行って寒天分子を切断して、ゼリー強度を１．５％
寒天濃度で１０〜２５０ｇ／ｃｍ 2 の範囲に調整する熱
処理工程とを有することを特徴とする低強度寒天の製造
方法。2. A step of extracting an agar component from raw seaweed,
A step of filtering the extract obtained in this step, a step of gelling the filtrate obtained in this step, a dehydration treatment of the obtained gel, and a step of drying the concentrated gel obtained in this step And, after any one of the above steps, heat treatment is performed to cut agar molecules, and the jelly strength is increased to 1.5%.
And a heat treatment step of adjusting the agar concentration to a range of 10 to 250 g / cm 2, a method for producing low-strength agar.
粉砕された乾燥寒天に対して、ダイプレート温度９０〜
１８０℃，圧力７〜１５ＭＰａの条件下で行うことを特
徴とする請求項２記載の低強度寒天の製造方法。3. The heat treatment step, after the drying step,
For crushed dry agar, die plate temperature 90-
The method for producing low-strength agar according to claim 2, wherein the method is performed under the conditions of 180 ° C and a pressure of 7 to 15 MPa.
寒天に対して、水を加えた加湿状態で行うことを特徴と
する請求項３記載の低強度寒天の製造方法。4. The method for producing low-strength agar according to claim 3, wherein the heat treatment step is performed in a humidified state in which water is added to the crushed dry agar.
過液，前記濃縮ゲルを再溶解した液のいずれかに対し
て、液温度１００〜１５０℃，圧力０〜２ＭＰａの条件
下で行うことを特徴とする請求項２記載の低強度寒天の
製造方法。5. The heat treatment step is carried out under conditions of a liquid temperature of 100 to 150 ° C. and a pressure of 0 to 2 MPa for any of the extract, the filtrate, and the liquid in which the concentrated gel is redissolved. The method for producing low-strength agar according to claim 2, wherein
より行うことを特徴とする請求項２〜５のいずれかに記
載の低強度寒天の製造方法。6. The method for producing low-strength agar according to claim 2, wherein the heat treatment step is performed by an extruder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30673396A JP3414954B2 (en) | 1996-11-18 | 1996-11-18 | Low strength agar and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30673396A JP3414954B2 (en) | 1996-11-18 | 1996-11-18 | Low strength agar and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10146174A JPH10146174A (en) | 1998-06-02 |
| JP3414954B2 true JP3414954B2 (en) | 2003-06-09 |
Family
ID=17960654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30673396A Expired - Fee Related JP3414954B2 (en) | 1996-11-18 | 1996-11-18 | Low strength agar and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3414954B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4936822B2 (en) * | 2006-08-21 | 2012-05-23 | 株式会社明治 | Agar food |
| JPWO2008053984A1 (en) * | 2006-11-02 | 2010-02-25 | サンスター株式会社 | Health food containing aloe and agar |
| JP4102416B2 (en) | 2006-11-15 | 2008-06-18 | 丸石製薬株式会社 | Gel-like disinfectant composition |
| WO2009022383A1 (en) * | 2007-08-10 | 2009-02-19 | Ina Food Industry Co., Ltd. | Method for removing briosose, tengusa, agar and method for producing agar |
| US9125839B2 (en) | 2010-03-12 | 2015-09-08 | The Nisshin Oillio Group, Ltd. | Composition for external use on skin, cosmetic, and cleaning agent |
-
1996
- 1996-11-18 JP JP30673396A patent/JP3414954B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10146174A (en) | 1998-06-02 |
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