JP3627877B2 - Red coloring - Google Patents

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Publication number
JP3627877B2
JP3627877B2 JP29471595A JP29471595A JP3627877B2 JP 3627877 B2 JP3627877 B2 JP 3627877B2 JP 29471595 A JP29471595 A JP 29471595A JP 29471595 A JP29471595 A JP 29471595A JP 3627877 B2 JP3627877 B2 JP 3627877B2
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Japan
Prior art keywords
iron
lactoferrin
complex
red
fading
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JPH09111140A (en
Inventor
一正 浜下
俊昭 内田
稔夫 桜井
章 富澤
高橋  健
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Snow Brand Milk Products Co Ltd
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Snow Brand Milk Products Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、鉄−ラクトフェリンを有効成分とする赤色系着色料に関する。この赤色系着色料は、保存中に紫外線、可視光線、赤外線等の光線を浴びても退色が無いので有用である。
【0002】
【従来の技術】
従来、加工食品においては、加工により失われる色や食欲をそそるような色を付けるために着色料が用いられることが多い。そして、この着色料として使用されている天然の赤色、黄色系色素としては、β−カロチン、クチナシ黄色素(クロシン)、パプリカ色素(カロチノイド)、ビートレッド (ベタシアン系) 、紅麹赤色素 (アザフィロン系) 、ベニバナ色素 (カルコン系) 、赤キャベツ色素、シソ色素、ブドウ色素 (アントシアニン系) 等が知られている。しかし、これらの色素は、保存中に紫外線、可視光線、赤外線等の光線を浴びて、しばしば退色することが認められている。
そこで、着色料を使用した加工食品の品質保持や色を保持する為に、紫外線遮断包材や着色包材が利用されているが、紫外線遮断包材を用いても紫外線以外の光線で光劣化する色素も多く、その効果は必ずしも完全とはいえない。また、着色包材を用いると内容物が見え難いという欠点があり、現状では、海苔、珍味、スナック菓子等に使用されているのみである。
【0003】
【発明が解決しようとする課題】
本発明者らは、上記の問題に鑑み、紫外線、可視光線、赤外線等の光線により退色しない赤色系着色料を供給するべく鋭意研究を進めたところ、鉄−ラクトフェリンを有効成分とすることにより、紫外線、可視光線、赤外線等の光線により退色しない赤色系着色料とすることができることを見出し、本発明を完成した。したがって、本発明は、紫外線、可視光線、赤外線等の光線を浴びても退色しない赤色系着色料を提供することを課題とする。
【0004】
【課題を解決するための手段】
本発明では、鉄−ラクトフェリンを赤色系着色料の有効成分とする。従来の赤色系着色料は、紫外線、可視光線、赤外線等の光線を浴びることにより着色成分が変質し、退色する。しかし、本発明の赤色系着色料の有効成分である鉄−ラクトフェリンは、紫外線、可視光線、赤外線等の光線を浴びても着色成分が安定であるため、退色しないという特徴を有する。
【0005】
ラクトフェリン類は、通常1分子当たり鉄2原子をキレート結合する能力を有しており、これはラクトフェリン類1g当たり鉄14mgを結合することに相当する。ところが、本発明で用いる鉄−ラクトフェリンは、ラクトフェリン類に特定の処理を施すことにより、ラクトフェリン類1分子当たり少なくとも鉄3原子を安定に保持できるようにしたものである。このようにすることにより、多量の鉄をラクトフェリンに結合させることができる。このような鉄−ラクトフェリンは従来より知られている。例えば、ラクトフェリンを水に溶解し、これに鉄化合物を添加してラクトフェリンと鉄とを反応させて溶液中の鉄を非遊離状態にして得られる鉄−ラクトフェリン [特開平4−141067号公報] 、ラクトフェリン溶液に鉄塩を添加し、アルカリを加えて溶液のpHを上げて得られる鉄を安定に保持するラクトフェリン粉末 [特開平7− 17825号公報] 、ラクトフェリンのアミノ基に重炭酸イオンを介して鉄が結合した耐熱性鉄−ラクトフェリン結合体 [特開平6−239900号公報] 、あるいは、炭酸、重炭酸及びラクトフェリンを含む溶液に鉄を含有する溶液を混合して得られる炭酸及び/又は重炭酸−鉄−ラクトフェリン複合体 [特願平7− 86023号] 等が知られている。本発明における鉄−ラクトフェリンは、これらのいずれのものでも用いることができる。鉄−ラクトフェリンは、鉄とラクトフェリンとが結合した状態のものであって、鉄とラクトフェリンとが直接結合していても、あるいは、他の物質を介して結合した状態のものであっても良く、いわゆる、鉄がイオンの状態で存在していないものであれば良い。特に、ラクトフェリン類に炭酸及び/又は重炭酸と鉄とが結合した鉄−ラクトフェリン結合体 [特開平6−239900号公報] や鉄−ラクトフェリン複合体 [特願平7− 86023号] を用いることが好ましい。なお、この鉄−ラクトフェリン複合体の色素としての特徴は、可視光帯域(700nm〜300nm)で明確なピークが無いという点である。鉄−ラクトフェリン複合体の分光光度計 (日立U−2000) チャートを図1に示す。
この鉄−ラクトフェリン複合体は参考例2のラクトフェリン複合体を水に0.5 %溶液になるように溶解したものを試料として用いた。
【0006】
この鉄−ラクトフェリンは、紫外線、可視光線、赤外線等の光線を浴びても退色しないという性質を有すると共に、耐熱性やpH安定性等に優れているという性質を有する。なお、炭酸及び/又は重炭酸を介して結合していない鉄−ラクトフェリン結合体や鉄−ラクトフェリン複合体では、鉄が完全にラクトフェリン類と結合していないので、非結合の鉄を除去してから使用することが望ましい。
本発明で用いる鉄−ラクトフェリンを製造する際に使用することができるラクトフェリン類としては、哺乳類の乳等の分泌液から分離されるラクトフェリンを例示することができるが、血液や臓器等から分離されるトランスフェリンや卵等から分離されるオボトランスフェリン等も同様の特性を有しており、ラクトフェリン類と同様に使用することが可能である。また、ラクトフェリン類は、完全に単離されている必要はなく、他の成分が含まれているものでも構わない。さらに遺伝子操作により、微生物、動物細胞、トランスジェニック動物等から生産されたラクトフェリン類も使用することが可能である。そして、ラクトフェリン類をトリプシン、ペプシン、キモトリプシン等の酵素で加水分解したものを使用することもできる。
【0007】
また、本発明で用いる鉄−ラクトフェリンを製造する際に使用することができる鉄としては、硫酸第一鉄、グルコン酸第一鉄、乳酸鉄、クエン酸鉄、クエン酸第一鉄ナトリウム、クエン酸鉄アンモニウム、ピロリン酸第一鉄、ピロリン酸第二鉄、塩化第二鉄、硝酸第二鉄、硫酸第二鉄等を例示することができる。
なお、本発明の赤色系着色料の使用方法は、特に限定されておらず、通常の着色料と同様で構わない。また、本発明の赤色系着色料は、飲食品の着色のみならず、あらゆる分野で赤色系着色料として使用することが可能である。
特に、鉄−ラクトフェリンが水溶性であるので、マーガリン、ゼリー等の食品の着色に 0.001〜1 %の範囲でこれらの食品に粉末状で直接強制混合するかあるいは水溶液として添加して使用することが好ましい。
【0008】
【発明の実施の形態】
以下に参考例及び実施例を示し、本発明を具体的に説明する。
【参考例1】
ウシラクトフェリン 90gと塩化第二鉄6水和物 52gを水10リットルに溶解し、撹拌機で撹拌しながら重炭酸ナトリウム5gを添加して鉄−ラクトフェリン結合体を含む溶液を調製した。そして、この溶液を分子量 5,000カットの限外濾過膜で脱塩及び濃縮した後、水を加えて容量10リットルの鉄−ラクトフェリン結合体溶液とした。なお、この鉄−ラクトフェリン結合体溶液中の鉄量を誘導結合プラズマ発光分光器(ICP)で測定したところ、鉄−ラクトフェリン結合体溶液中に含まれる鉄量は 102mg/100mlであった。また、この鉄−ラクトフェリン結合体溶液は、高い鉄濃度であるにもかかわらず無味無臭であった。
この鉄−ラクトフェリン結合体は、誘導結合プラズマ発光分光器(ICP)分析及び元素分析を行なったところラクトフェリン1分子当たり鉄を 105原子、重炭酸イオン5原子含んでいる。
【0009】
【参考例2】
水2リットルに重炭酸ナトリウム400gを添加し、撹拌機で撹拌して調製した重炭酸ナトリウム過飽和溶液中に、水8リットルにウシラクトフェリン 90gと塩化第二鉄6水和物 52gを溶解した溶液を撹拌しながら添加し、鉄−ラクトフェリン複合体を含む溶液を調製した。この溶液を分子量 5,000カットの限外濾過膜で脱塩及び濃縮した後、水を加えて容量10リットルの鉄−ラクトフェリン複合体溶液とした。なお、この鉄−ラクトフェリン複合体溶液中の鉄量を誘導結合プラズマ発光分光器(ICP)で測定したところ、鉄−ラクトフェリン複合体溶液中に含まれる鉄量は 101mg/100mlであった。また、この鉄−ラクトフェリン複合体溶液は、高い鉄濃度であるにもかかわらず無味無臭であった。
この鉄−ラクトフェリン複合体は、ラクトフェリン1分子当り鉄を 108原子、重炭酸イオンを54原子含んでいる。
【0010】
【実施例1】
シュークロース6重量%、クエン酸 0.1重量%の水溶液に、参考例1により得られた鉄−ラクトフェリン結合体を有効成分とする赤色系着色料を鉄−ラクトフェリン結合体が 0.2%になるように混合した後、90℃で10秒間殺菌し、透明な瓶に充填した。そして、この瓶を20℃に温度制御したショーケースで蛍光燈を照射しながら3週間保持した後、分光光度計で 440nmの吸光度を測定し、退色の度合いを評価した。なお、退色の度合いの評価は、吸光度の残存率が少ない程、退色し易いと判断した。その結果を表1に示す。
【0011】
【比較例1】
シュークロース6重量%、クエン酸 0.1重量%の水溶液に、β−カロチン系着色料、クチナシ色素系着色料あるいはパプリカ色素系着色料の各着色料をそれぞれ 0.2%になるように混合した後、90℃で10秒間殺菌し、透明な瓶に充填した。そして、この瓶を20℃に温度制御したショーケースで蛍光燈を照射しながら3週間保持した後、分光光度計で 440nmの吸光度を測定し、退色の度合いを評価した。なお、退色の度合いの評価は、実施例1と同様に行った。その結果を表1に示す。
この結果から、本発明の赤色系着色料のみが蛍光照射によっても退色しないと判断された。
【0012】
【表1】

Figure 0003627877
【0013】
【実施例2】
参考例2により得られた鉄−ラクトフェリン複合体を有効成分とする赤色系着色料を表2に示した配合となるようマーガリン原料に混合して95℃で10秒間殺菌し、冷却練圧した後、黄色のプラスチック容器に充填した。そして、このプラスチック容器を10℃に温度制御したショーケースで蛍光燈を照射しながら30日間保持した後、色差計でLabを測定し、退色の度合いを評価した。なお、退色の度合いの評価は、白色の程度を示す指標としてよく用いられているb値を用い、Δb値(b−a) が大きい程、退色の度合いが大きいと判断した。その結果を表3に示す。
【0014】
【比較例2】
β−カロチン系着色料あるいはパプリカ色素系着色料の各着色料をそれぞれ表2に示した配合となるようマーガリン原料に混合して95℃で10秒間殺菌し、冷却練圧した後、黄色のプラスチック容器に充填した。そして、このプラスチック容器を10℃に温度制御したショーケースで蛍光燈を照射しながら30日間保持した後、色差計でLabを測定し、退色の度合いを評価した。なお、退色の度合いの評価は、実施例2と同様に行った。その結果を表3に示す。
この結果から、本発明の赤色系着色料のみが蛍光燈照射によっても退色しないと判断された。
【0015】
【表2】
Figure 0003627877
【0016】
【表3】
Figure 0003627877
【0017】
【実施例3】
参考例2により得られた鉄−ラクトフェリン複合体を有効成分とする赤色系着色料を表4に示した配合となるようゼリー原料に混合し、90℃で10秒間殺菌した後、透明なプラスチック容器に充填した。そして、このプラスチック容器を10℃に温度制御したショーケースで蛍光燈を照射しながら15日間保持した後、色差計でLabを測定し、退色の度合いを評価した。なお、退色の度合いの評価は、実施例2と同様に行った。その結果を表5に示す。
【0018】
【比較例3】
β−カロチン系着色料及びパプリカ色素系着色料の各着色料をそれぞれ表4に示した配合となるようゼリー原料に混合し、90℃で10秒間殺菌した後、透明なプラスチック容器に充填した。そして、このプラスチック容器を10℃に温度制御したショーケースで蛍光燈を照射しながら15日間保持した後、色差計でLabを測定し、退色の度合いを評価した。なお、退色の度合いの評価は、実施例2と同様に行った。その結果を表5に示す。
この結果から、本発明の赤色系着色料のみが蛍光燈照射によっても退色しないと判断された。
【0019】
【表4】
Figure 0003627877
【0020】
【表5】
Figure 0003627877
【0021】
【発明の効果】
本発明の赤色系着色料は、その有効成分である鉄−ラクトフェリンが紫外線、可視光線、赤外線等の光線を浴びても退色せず、食品成分等と混合しても変色せず、鉄−ラクトフェリン自体が無毒であるので赤色系着色料として飲食品、これらの包装材料、医薬その他あらゆる分野で利用することができる。
【図面の簡単な説明】
【図1】本発明の鉄−ラクトフェリン複合体の分光光度計による吸光チャートを示す。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a red colorant containing iron-lactoferrin as an active ingredient. This red colorant is useful because it does not fade even when exposed to light rays such as ultraviolet rays, visible rays, and infrared rays during storage.
[0002]
[Prior art]
Conventionally, in processed foods, coloring agents are often used to add colors that are lost by processing or colors that are appetizing. Natural red and yellow pigments used as coloring agents include β-carotene, gardenia yellow pigment (crocin), paprika pigment (carotenoid), beet red (betacyan), red yeast red pigment (azaphylon) ), Safflower pigment (chalcone), red cabbage pigment, perilla pigment, grape pigment (anthocyanin), and the like. However, it is recognized that these dyes often fade when exposed to light rays such as ultraviolet rays, visible rays, and infrared rays during storage.
In order to preserve the quality and color of processed foods that use colorants, UV-blocking packaging and colored packaging are used, but even when UV-blocking packaging is used, light degradation occurs with light other than ultraviolet rays. There are many pigments that do, and the effect is not always perfect. In addition, the use of colored packaging materials has the disadvantage that the contents are difficult to see, and currently it is only used for laver, delicacies, snacks and the like.
[0003]
[Problems to be solved by the invention]
In view of the above problems, the present inventors have conducted intensive research to supply a red colorant that does not fade with light rays such as ultraviolet rays, visible rays, and infrared rays.By using iron-lactoferrin as an active ingredient, The inventors have found that a red colorant that does not fade with light rays such as ultraviolet rays, visible rays, and infrared rays can be obtained, and the present invention has been completed. Therefore, an object of the present invention is to provide a red colorant that does not fade even when exposed to light such as ultraviolet rays, visible rays, and infrared rays.
[0004]
[Means for Solving the Problems]
In the present invention, iron-lactoferrin is used as the active ingredient of the red colorant. Conventional red colorants undergo a color change due to exposure to ultraviolet rays, visible rays, infrared rays, or the like, and fade. However, iron-lactoferrin, which is an active ingredient of the red colorant of the present invention, has a feature that the colored component is stable even when exposed to light rays such as ultraviolet rays, visible rays, and infrared rays, and thus does not fade.
[0005]
Lactoferrins usually have the ability to chelate 2 atoms of iron per molecule, which corresponds to binding 14 mg of iron per gram of lactoferrin. However, the iron-lactoferrin used in the present invention can stably hold at least three iron atoms per molecule of lactoferrin by applying a specific treatment to the lactoferrin. By doing so, a large amount of iron can be bound to lactoferrin. Such iron-lactoferrin is conventionally known. For example, iron-lactoferrin obtained by dissolving lactoferrin in water and adding an iron compound thereto to react lactoferrin with iron to make the iron in the solution non-free [Japanese Patent Laid-Open No. 4-141067], A lactoferrin powder that stably retains iron obtained by adding an iron salt to a lactoferrin solution and increasing the pH of the solution by adding an alkali [Japanese Patent Laid-Open No. 7-17825], via a bicarbonate ion to the amino group of lactoferrin Iron-bound heat-resistant iron-lactoferrin conjugate [JP-A-6-239900] or carbonic acid and / or bicarbonate obtained by mixing a solution containing iron with a solution containing carbonic acid, bicarbonate and lactoferrin -Iron-lactoferrin complex [Japanese Patent Application No. 7-86023] and the like are known. Any of these may be used as the iron-lactoferrin in the present invention. Iron-lactoferrin is in a state where iron and lactoferrin are bound, and iron and lactoferrin may be bound directly, or may be in a state where they are bound via another substance, Any iron that does not exist in an ionic state may be used. In particular, it is possible to use an iron-lactoferrin conjugate [Japanese Patent Application Laid-Open No. 6-239900] or an iron-lactoferrin complex [Japanese Patent Application No. 7-86023] obtained by binding carbonic acid and / or bicarbonate and iron to lactoferrins. preferable. A feature of the iron-lactoferrin complex as a pigment is that there is no clear peak in the visible light band (700 nm to 300 nm). The spectrophotometer (Hitachi U-2000) of iron-lactoferrin complex is shown in FIG.
As the iron-lactoferrin complex, a sample obtained by dissolving the lactoferrin complex of Reference Example 2 in water so as to be a 0.5% solution was used as a sample.
[0006]
This iron-lactoferrin has the property of not fading even when exposed to light such as ultraviolet rays, visible rays, and infrared rays, and has properties such as excellent heat resistance and pH stability. In addition, in iron-lactoferrin conjugate and iron-lactoferrin complex that are not bound via carbonic acid and / or bicarbonate, iron is not completely bound to lactoferrin, so after removing unbound iron It is desirable to use it.
Examples of the lactoferrins that can be used in producing the iron-lactoferrin used in the present invention include lactoferrin separated from secretions such as mammalian milk, but are isolated from blood and organs. Ovotransferrin and the like separated from transferrin and eggs have similar characteristics and can be used in the same manner as lactoferrins. Moreover, the lactoferrins do not need to be completely isolated, and may contain other components. Furthermore, lactoferrins produced from microorganisms, animal cells, transgenic animals, etc. by genetic manipulation can also be used. And what hydrolyzed lactoferrin with enzymes, such as trypsin, pepsin, and chymotrypsin, can also be used.
[0007]
Moreover, as iron which can be used when manufacturing the iron- lactoferrin used by this invention, ferrous sulfate, ferrous gluconate, iron lactate, iron citrate, ferrous sodium citrate, citric acid Examples thereof include iron ammonium, ferrous pyrophosphate, ferric pyrophosphate, ferric chloride, ferric nitrate, and ferric sulfate.
In addition, the usage method of the red colorant of this invention is not specifically limited, You may be the same as that of a normal colorant. Moreover, the red colorant of the present invention can be used as a red colorant in various fields as well as food and drinks.
In particular, since iron-lactoferrin is water-soluble, it is used for coloring of foods such as margarine, jelly, etc. in the range of 0.001 to 1% by force and mixed with these foods directly or as an aqueous solution. It is preferable.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be specifically described with reference examples and examples below.
[Reference Example 1]
90 g of bovine lactoferrin and 52 g of ferric chloride hexahydrate were dissolved in 10 liters of water, and 5 g of sodium bicarbonate was added while stirring with a stirrer to prepare a solution containing an iron-lactoferrin conjugate. This solution was desalted and concentrated with an ultrafiltration membrane having a molecular weight of 5,000 cut, and then water was added to obtain a 10-liter iron-lactoferrin conjugate solution. When the amount of iron in the iron-lactoferrin conjugate solution was measured with an inductively coupled plasma emission spectrometer (ICP), the amount of iron contained in the iron-lactoferrin conjugate solution was 102 mg / 100 ml. Moreover, this iron-lactoferrin conjugate solution was tasteless and odorless despite its high iron concentration.
When this iron-lactoferrin conjugate was subjected to inductively coupled plasma emission spectroscopy (ICP) analysis and elemental analysis, it contained 105 atoms of iron and 5 atoms of bicarbonate ion per molecule of lactoferrin.
[0009]
[Reference Example 2]
A solution of 90 g bovine lactoferrin and 52 g ferric chloride hexahydrate dissolved in 8 liters of water in a supersaturated sodium bicarbonate solution prepared by adding 400 g of sodium bicarbonate to 2 liters of water and stirring with a stirrer. It added, stirring, and prepared the solution containing an iron- lactoferrin complex. This solution was desalted and concentrated with an ultrafiltration membrane having a molecular weight of 5,000 cut, and then water was added to obtain a 10-liter iron-lactoferrin complex solution. When the amount of iron in the iron-lactoferrin complex solution was measured with an inductively coupled plasma emission spectrometer (ICP), the amount of iron contained in the iron-lactoferrin complex solution was 101 mg / 100 ml. Further, this iron-lactoferrin complex solution was tasteless and odorless despite its high iron concentration.
This iron-lactoferrin complex contains 108 atoms of iron and 54 atoms of bicarbonate ion per lactoferrin molecule.
[0010]
[Example 1]
In an aqueous solution of 6% by weight sucrose and 0.1% by weight citric acid, a red colorant containing the iron-lactoferrin conjugate obtained in Reference Example 1 as an active ingredient is reduced to 0.2% iron-lactoferrin conjugate. The mixture was sterilized at 90 ° C. for 10 seconds and filled into a transparent bottle. The bottle was held for 3 weeks while irradiating a fluorescent lamp in a showcase controlled at 20 ° C., and then the absorbance at 440 nm was measured with a spectrophotometer to evaluate the degree of fading. In the evaluation of the degree of fading, it was determined that fading was easier as the absorbance remaining rate was smaller. The results are shown in Table 1.
[0011]
[Comparative Example 1]
Mix β-carotene colorant, gardenia colorant or paprika colorant in an aqueous solution of 6% by weight sucrose and 0.1% citric acid to 0.2%. After that, it was sterilized at 90 ° C. for 10 seconds and filled into a transparent bottle. The bottle was held for 3 weeks while irradiating a fluorescent lamp in a showcase controlled at 20 ° C., and then the absorbance at 440 nm was measured with a spectrophotometer to evaluate the degree of fading. The degree of fading was evaluated in the same manner as in Example 1. The results are shown in Table 1.
From this result, it was determined that only the red colorant of the present invention was not discolored even by fluorescence irradiation.
[0012]
[Table 1]
Figure 0003627877
[0013]
[Example 2]
After mixing the red colorant containing the iron-lactoferrin complex obtained in Reference Example 2 as an active ingredient into the margarine raw material so as to have the composition shown in Table 2, sterilized at 95 ° C. for 10 seconds, and cooled and pressured Filled into a yellow plastic container. And after holding this plastic container for 30 days, irradiating with a fluorescent lamp in a showcase whose temperature was controlled at 10 ° C., Lab was measured with a color difference meter to evaluate the degree of fading. In the evaluation of the degree of fading, the b value often used as an index indicating the degree of white was used, and it was determined that the degree of fading was larger as the Δb value (ba) was larger. The results are shown in Table 3.
[0014]
[Comparative Example 2]
Each colorant of β-carotene colorant or paprika colorant is mixed with the margarine raw material so as to have the composition shown in Table 2, sterilized at 95 ° C. for 10 seconds, cooled and pressured, and then a yellow plastic The container was filled. And after holding this plastic container for 30 days, irradiating with a fluorescent lamp in a showcase whose temperature was controlled at 10 ° C., Lab was measured with a color difference meter to evaluate the degree of fading. The degree of fading was evaluated in the same manner as in Example 2. The results are shown in Table 3.
From this result, it was determined that only the red colorant of the present invention did not fade even when irradiated with fluorescent soot.
[0015]
[Table 2]
Figure 0003627877
[0016]
[Table 3]
Figure 0003627877
[0017]
[Example 3]
A red colorant containing the iron-lactoferrin complex obtained in Reference Example 2 as an active ingredient is mixed with the jelly raw material so as to have the composition shown in Table 4, sterilized at 90 ° C. for 10 seconds, and then a transparent plastic container. Filled. The plastic container was held for 15 days while irradiating a fluorescent lamp in a showcase whose temperature was controlled at 10 ° C., and then Lab was measured with a color difference meter to evaluate the degree of fading. The degree of fading was evaluated in the same manner as in Example 2. The results are shown in Table 5.
[0018]
[Comparative Example 3]
Each of the β-carotene colorant and paprika colorant was mixed with the jelly raw material so as to have the composition shown in Table 4, sterilized at 90 ° C. for 10 seconds, and then filled into a transparent plastic container. The plastic container was held for 15 days while irradiating a fluorescent lamp in a showcase whose temperature was controlled at 10 ° C., and then Lab was measured with a color difference meter to evaluate the degree of fading. The degree of fading was evaluated in the same manner as in Example 2. The results are shown in Table 5.
From this result, it was determined that only the red colorant of the present invention did not fade even when irradiated with fluorescent soot.
[0019]
[Table 4]
Figure 0003627877
[0020]
[Table 5]
Figure 0003627877
[0021]
【The invention's effect】
The red colorant of the present invention does not fade when iron-lactoferrin, which is an active ingredient, is exposed to light rays such as ultraviolet rays, visible rays, and infrared rays, and does not change color when mixed with food ingredients, etc. Since it is non-toxic, it can be used as a red colorant in foods and drinks, packaging materials, medicines, and other fields.
[Brief description of the drawings]
FIG. 1 shows an absorption chart of an iron-lactoferrin complex of the present invention by a spectrophotometer.

Claims (4)

ラクトフェリン類1分子当たり鉄を少なくとも3原子保持した鉄−ラクトフェリンを有効成分とする、蛍光灯の照射による退色を防止した飲食品用赤色系着色料。A red colorant for foods and drinks , which contains iron-lactoferrin, which holds at least 3 atoms of iron per molecule of lactoferrin as an active ingredient, and prevents discoloration due to irradiation with a fluorescent lamp . 鉄−ラクトフェリンが、ラクトフェリン類に炭酸及び/又は重炭酸と鉄とが結合した鉄−ラクトフェリン結合体及び/又は鉄−ラクトフェリン複合体である請求項1記載の蛍光灯の照射による退色を防止した飲食品用赤色系着色料。2. The food / drink that prevents discoloration by irradiation with a fluorescent lamp according to claim 1, wherein the iron-lactoferrin is an iron-lactoferrin conjugate and / or an iron-lactoferrin complex in which carbonic acid and / or bicarbonate and iron are bound to lactoferrin. Red coloring for products . 鉄−ラクトフェリン結合体が、ラクトフェリン類1g当たり、15mg以上の炭酸及び/又は重炭酸と、10〜700mgの鉄とが結合した、鉄−ラクトフェリン結合体である請求項2記載の蛍光灯の照射による退色を防止した飲食品用赤色系着色料。3. By irradiation with a fluorescent lamp according to claim 2, wherein the iron-lactoferrin conjugate is an iron-lactoferrin conjugate in which 15 mg or more of carbonic acid and / or bicarbonate and 10 to 700 mg of iron are bound per 1 g of lactoferrin. Red coloring for food and drink that prevents fading. 鉄−ラクトフェリン複合体が、ラクトフェリン類1g当たり、35〜400mgの炭酸及び/又は重炭酸と、40〜500mgの鉄が結合した、鉄−ラクトフェリン複合体である請求項2記載の蛍光灯の照射による退色を防止した飲食品用赤色系着色料。3. By irradiation with a fluorescent lamp according to claim 2, wherein the iron-lactoferrin complex is an iron-lactoferrin complex in which 35 to 400 mg of carbonic acid and / or bicarbonate and 40 to 500 mg of iron are bound per 1 g of lactoferrin. Red coloring for food and drink that prevents fading.
JP29471595A 1995-10-18 1995-10-18 Red coloring Expired - Fee Related JP3627877B2 (en)

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Publication number Priority date Publication date Assignee Title
JPH1149698A (en) 1997-07-31 1999-02-23 Santen Pharmaceut Co Ltd Water-based lactoferrin preparation with increased stability
JP3404294B2 (en) * 1998-08-11 2003-05-06 雪印乳業株式会社 Iron-whey protein hydrolyzate complex
NZ540633A (en) * 2005-06-09 2008-12-24 Fonterra Co Operative Group Preparing metal ion-lactoferrin comprising contacting a lactoferrin source with a lactoferrin-binding matrix, contacting the immobilised lactoferrin with a source of metal ions to produce metal ion-lactoferrin
JP5414142B2 (en) * 2006-01-23 2014-02-12 雪印メグミルク株式会社 Lipid metabolism improver

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