JP2005058069A - Pigment fading preventive agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safe fading preventive agent derived from plants, significantly suppressing the fading phenomenon of gardenia yellow pigment as natural pigment. <P>SOLUTION: This pigment fading preventive agent of gardenia yellow pigment has as the active ingredient the extract of leaves of Cinnamomum camphora Sieb. glaucescens Alex. Braun. The fading preventive agent is added particularly to food containing gardenia yellow pigment so as to significantly suppress fading of the food caused by heat or light. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an anti-fading agent for gardenia yellow pigment that can be used in food, health food, food for specified health use, feed, and the like.

  In recent years, natural pigments such as gardenia pigments have been widely used in the fields of foods, cosmetics, pharmaceuticals and the like in place of synthetic pigments that have been frequently used.

  However, these natural pigments are unstable and are known to be easily discolored and discolored by oxygen, heat treatment or light irradiation. Recently, glass containers, plastic bottles, vinyls, etc. whose contents can be seen well. Transparent containers such as packaging are favored by consumers, and the opportunity to be exposed to light such as fluorescent lights for a long time has increased, resulting in a change in color tone and fading over time, resulting in a marked drop in commercial value. There is a problem of end. In particular, gardenia yellow pigment is extremely unstable in the acidic region, and is known to fade in a short period of time under the influence of oxygen, light and heat.

For this reason, conventionally, various stabilizers and anti-fading agents have been studied and developed in order to eliminate the instability of the gardenia yellow pigment and prevent the fading phenomenon. For example, it is known that chlorogenic acid and caffeic acid have a fading prevention effect on gardenia blue pigment and safflower yellow pigment. (Patent Document 1) Further, it is described that chlorogenic acid and caffeic acid have a fading preventing effect on gardenia yellow pigment. (Patent Document 2)
Japanese Patent Laid-Open No. 5-32909 JP-A-6-93199

  However, the present inventors have confirmed that the discoloration prevention effect of chlorogenic acid and caffeic acid on the above-mentioned dyes is not sufficiently satisfactory, and in particular, the discoloration of gardenia yellow dyes due to heat and light cannot be sufficiently prevented. Was the actual situation. An object of the present invention is to provide an anti-fading agent capable of significantly suppressing the fading phenomenon of these natural pigments.

  As a result of intensive studies in order to solve the above problems, the present inventors have found in Cinnamum camphora Sieb. Glacescens Alex. Braun the effect of preventing the fading of gardenia yellow pigment, and to complete the present invention. It came.

  The dye fading preventive agent of the present invention is obtained from natural melamine leaf, has high safety and exhibits a high fading preventing effect.

  The bonito leaves used in the present invention are not particularly limited, such as the production area and picking time, but bonito leaves from Japan and China are preferably used. Moreover, the mellow leaf used may be fresh or dried, and may be a residue after collecting essential oil.

  The shape of the mellow leaf used for extraction in the present invention is not particularly limited, but it is preferable to use a dried leaf that has been cut or crushed to 5 mm or less in consideration of extraction efficiency and ease of operation.

  The anti-fading agent of the present invention can be extracted from ginger leaves by any method such as continuous extraction, immersion extraction, stirring extraction, countercurrent extraction, and supercritical extraction, but is preferably extracted with stirring using a polar solvent. . Examples of polar solvents include alcohols such as methanol, ethanol, and butanol, organic solvents such as acetone, ethyl acetate, and diethyl ether, and water, and these solvents may be used in combination. Hydrous ethanol is particularly preferably used from the standpoint of safety in use.

  When performing polar solvent extraction in the present invention, it is preferable to use 5 to 100 parts by weight of a polar solvent with respect to 1 part by weight of mellow leaves. For example, when using water-containing ethanol, it is more preferable that the amount of water-containing ethanol is 10 to 50 parts by weight with respect to 1 part by weight of the green leaves. Moreover, although water and ethanol of hydrous ethanol can be mixed by arbitrary ratios, it is more preferable that it is 90: 10-40: 60. Although extraction temperature is not specifically limited, 10-80 degreeC is preferable and it is more preferable that it is 20-60 degreeC. Moreover, although extraction time is not specifically limited, Several minutes-2 hours are preferable, and it is more preferable to perform stirring extraction for 10 to 60 minutes.

  Furthermore, it is preferable to decolorize and deodorize the water-containing ethanol extract by the adsorption action of the porous material by activated carbon or the like. Specifically, activated carbon is put into the extract, stirred as necessary, and then the activated carbon is removed by filtration. Then, the extraction solvent is distilled off under reduced pressure as necessary.

  The extract may be an aqueous solution or a solid material by removing the polar solvent as necessary. When the extract is dried to be a solid, an excipient such as dextrin can be added, and the extract can be dried by a known method such as spray drying or freeze drying. The obtained solid may be pulverized or ground to form a powder, and can also be formed into a tablet, tablet or the like by a known method.

  The rich extract or extract obtained as described above can be used as it is as an anti-fading agent for pigments, but it may be formulated by mixing with other anti-fading agents and auxiliaries.

  Examples of the anti-fading agent include L-ascorbic acid, sodium L-ascorbate, erythorbic acid, sodium erythorbate, dl-α-tocopherol, catechin, enzyme-treated rutin, quercetin, grape seed extract, rosemary extract, rutin Etc. Examples of the auxiliary agent include amino acids such as alanine, organic acids such as citric acid and salts thereof, phosphoric acid and salts thereof, polymerized phosphates, glycerin fatty acid ester, phytic acid and the like.

  The anti-fading agent of the present invention can be added to foods and feeds. For example, in foods, beverages such as coffee, tea, tea, fruit juice, soft drinks, dairy products such as milk, butter, cheese, cream, processed foods such as miso soup, soup, edible oils, processed fats, margarines, etc. Seasonings such as fats and oils, mayonnaise, dressings, other nutrients, liquid or fluid foods such as syrup and jam, processed cereals such as cooked rice, rice cakes, bread, potato products, chocolate, candy, baked goods and other confectionery It can be added to processed foods such as ham, sausage and other solid foods such as sprinkles. As feed, it can be used for pet foods such as various cat foods and dog foods.

  The addition amount of the anti-fading agent of the present invention is 0.001 to 85% by weight, preferably 0.01 to 60% by weight, as a rich extract in the food and feed. In addition, when the solvent of the extract with water or alcohol is recovered and used as a concentrate or further solidified and used as a solid, an addition amount of about 1/2 to 1/10 of the addition amount may be used. .

(Example 1) Production of anti-fading agent from mellow leaves 120 g of 50 v / v% ethanol was added to 8 g of mellow leaves that had been air-dried for 1 week, and the mixture was stirred at 60 ° C for 1 hour and filtered. The obtained filtrate was separated by centrifugation, and the solvent was distilled off from the supernatant under reduced pressure to obtain an extract.

(Example 2) Measurement of anti-fading activity of mellow leaf extract Gardenia yellow pigment was diluted to 1 w / w% to prepare gardenia yellow pigment solution. Next, 0.05 w / w% of the extract of mellow leaf of Example 1 was added to this dye solution.

10 mL of the obtained dye solution was put into a colorless and transparent 10 mL bottle, stored at 20 ° C. under irradiation with a fluorescent lamp (4000 lux), the absorbance at 480 nm was measured over time, and the dye residual ratio was determined from the following formula. In addition, a green tea catechin (polyphenone 60A: manufactured by Mitsui Norin Co., Ltd.) added at 0.05% by mass as a comparative control and an additive-free one as a control were prepared, stored in the same manner, and the absorbance at 480 nm was measured over time. did. The change with time in the residual ratio of the dye is shown in FIG.

Absorbance of irradiated sample at 480 nm Dye remaining rate (%) = ─────────────────── × 100
Absorbance at 480 nm of unirradiated sample

As shown in FIG. 1, it was confirmed that the mellow leaf extract showed anti-fading activity compared with green tea catechins and could be used as an anti-fading agent for gardenia yellow pigment.

(Figure 1)

(Example 3) Lemon beverage Fructose glucose liquid sugar 30 parts by weight, sucrose 10 parts by weight, citric acid 0.4 parts by weight, lemon juice 5.0 parts by weight, lemon flavor 0.2 parts by weight, gardenia yellow pigment 0. 05 parts by weight, 0.005 parts by weight of the extract obtained in Example 1, 100 parts by weight with water, heat sterilized at 80 ° C. for 30 minutes, and then cooled to obtain a lemon beverage.

  By adding the anti-fading agent of the present invention to products using gardenia yellow pigments such as food and feed, particularly fading due to heat, light, etc. can be suppressed.

Claims (2)

An anti-fading agent for gardenia yellow pigment, characterized by comprising an extract of melamine leaf as an active ingredient. A food and feed comprising the anti-fading agent for gardenia yellow pigment according to claim 1.