JP2005124571A - Method for inhibiting deterioration of flavor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for inhibiting deterioration of flavor in a food which contains an oil phase containing diglyceride and a water phase. <P>SOLUTION: This method for inhibiting the deterioration of the flavor of the food which contains the water phase and the oil phase containing the diglyceride is characterized in that a diglyceride content in the oil phase is not less than 15 wt%, 80 wt% or more of fatty acids composing the diglyceride are unsaturated fatty acids, and fatty acid esters of L-ascorbic acid are not substantially contained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for suppressing flavor deterioration of food and a food in which flavor deterioration is suppressed.

In recent years, it has been clarified that diglyceride has an obesity-preventing action, a weight gain-inhibiting action, and the like (see Patent Documents 1 to 3), and attempts have been made to add this to various foods (Patent Documents 4 to 8). reference).
Of the diglyceride-containing foods, edible fats and oils such as fried oil are often used for cooking. In order to suppress deterioration during cooking, it is known that L-ascorbic acid fatty acid ester and tocopherol as antioxidants should be blended (see Patent Documents 9 to 11).
Japanese Unexamined Patent Publication No. 4-300826 JP-A-10-176181 WO99 / 48378 Japanese Patent Laid-Open No. 3-8431 JP-A-4-79858 JP-A-4-51866 WO96 / 32022 publication JP 2001-138 A JP 2001-61425 A JP 2002-371294 A WO00 / 77133

  As described above, diglyceride-containing fats and oils have excellent physiological effects, and therefore can be applied to foods containing an aqueous phase, and are applied to emulsions such as dressings and mayonnaise. However, in foods containing an oil phase containing diglyceride and an aqueous phase, it was found that there was a flavor deterioration after long-term storage that was not caused by diglyceride-containing fats and oils that did not contain an aqueous phase, and off-flavor generation when stored under fluorescent light. did. It was also found that this flavor deterioration is different from the deterioration during cooking of diglyceride-containing fats and oils that do not contain an aqueous phase.

  Accordingly, an object of the present invention is to provide a method for inhibiting flavor deterioration in foods containing an oil phase and a water phase containing diglycerides.

  Therefore, the present inventor made various studies to suppress the deterioration of the flavor of foods containing an oil phase containing diglyceride and an aqueous phase, and was used for the purpose of preventing deterioration of the diglyceride-containing fat during cooking. -It has been found that if the ascorbic acid fatty acid ester is not substantially contained, flavor deterioration after long-term storage can be suppressed. Furthermore, among the tocopherols used for the purpose of preventing deterioration during cooking of the diglyceride-containing fats and oils, a certain amount or more of δ-tocopherol is blended, and the L-ascorbic acid fatty acid ester is not substantially contained. The present inventors have found that flavor deterioration after long-term storage can be suppressed and occurrence of off-taste after storage under fluorescent light can also be suppressed.

  The present invention is a method for inhibiting flavor deterioration of a food product comprising an aqueous phase and an oil phase containing diglyceride, wherein the diglyceride content in the oil phase is 15% by mass or more, and the diglyceride constituent fatty acid is 80% by mass or more. Is an unsaturated fatty acid and does not substantially contain L-ascorbic acid fatty acid ester.

  Further, the present invention is a food containing an aqueous phase and an oil phase containing diglyceride, wherein the diglyceride content in the oil phase is 15% by mass or more, and 80% by mass or more in the constituent fatty acids of the diglyceride is unsaturated. The present invention provides a food that is a fatty acid and contains 200 ppm or more of δ-tocopherol and substantially does not contain L-ascorbic acid fatty acid ester.

  ADVANTAGE OF THE INVENTION According to this invention, the flavor deterioration after long-term storage in the foodstuff containing water phases, such as dressing, mayonnaise, margarine, soup, and sauce, and the fats and oils containing diglyceride is suppressed.

  In the present invention, the food that is the subject of flavor deterioration suppression is a food containing an aqueous phase and an oil phase containing diglyceride. Moreover, the flavor deterioration which is a problem in the present invention is completely different from the deterioration during cooking that occurs in diglyceride-containing fats and oils not containing an aqueous phase. That is, deterioration during cooking of diglyceride-containing fats and oils that do not contain an aqueous phase is due to oxidation by heating, but flavor deterioration after storage of a food containing an oil phase containing diglyceride and water in the present invention is Metallic taste and nasty taste, both are completely different.

  The diglyceride content in the oil phase containing diglyceride in the food of the present invention is 15% by mass or more, 30% by mass or more, from the viewpoint of effectiveness as a lipid metabolism improving food, particularly a neutral fat accumulation-inhibiting food. It is preferably 35% by mass or more, particularly 50% by mass or more, particularly 70% by mass or more. Furthermore, from the viewpoint of diglyceride production, the diglyceride content in the oil phase is preferably 98% by mass or less, particularly preferably 95% by mass or less. The oil phase may contain triglycerides, monoglycerides, free fatty acids and the like in addition to diglycerides. The monoglyceride content in the oil phase is preferably 2% by mass or less, particularly preferably 1.5% by mass or less. The content of free fatty acid (salt) in the oil phase is preferably 3.5% by mass or less, more preferably 0 to 1.5% by mass, and particularly preferably 0 to 0.5% by mass. Most of the balance is triglycerides.

  Further, the constituent fatty acid of the diglyceride is 80% by mass or more, preferably 80 to 100% by mass, more preferably 90 to 100% by mass, and further preferably 93 to 98% by mass in terms of physiological effect and appearance. It is a fatty acid. Moreover, it is preferable that carbon number of the constituent fatty acid of the said diglyceride is 8-24, especially 16-22.

  Of the constituent fatty acids of the diglyceride, when the content of trans-unsaturated fatty acid exceeds 5% by mass in the total fatty acids, flavor deterioration after long-term storage tends to be remarkable. The flavor deterioration inhibiting method according to the present invention is particularly effective for foods having an oil phase containing diglycerides having a low content of trans-unsaturated fatty acids (5% by mass or less). The trans unsaturated fatty acid content in the diglyceride-constituting fatty acid in foods in which the method of the present invention is particularly effective is preferably 0.1 to 4% by mass, more preferably 0.5 to 3.5% by mass. Here, the trans-type unsaturated fatty acid means one in which at least one carbon-carbon double bond in the unsaturated fatty acid molecule is trans-type.

  In the present invention, it is necessary for the oil phase to contain substantially no L-ascorbic acid fatty acid ester in terms of suppressing flavor deterioration after long-term storage. Here, “not containing substantially” means that the content in the oil phase is 15 ppm or less. Examples of L-ascorbic acid fatty acid esters include L-ascorbyl palmitate and L-ascorbic acid stearate.

The food of the present invention preferably contains substantially no L-ascorbic acid fatty acid ester and 200 ppm of δ-tocopherol for the purpose of suppressing flavor deterioration after long-term storage. When the δ-tocopherol content in the oil phase is less than 200 ppm, a metallic taste is exhibited by storage, and a sufficient flavor deterioration suppressing effect cannot be obtained. Although depending on the raw material and the production method, the diglyceride-containing fat may contain 50 to 100 ppm of δ-tocopherol derived from the raw material, but this amount does not provide a sufficient flavor deterioration suppressing effect. A preferable δ-tocopherol content in the oil phase is 250 to 1200 ppm, more preferably 300 to 1000 ppm, still more preferably 350 to 700 ppm, and particularly preferably 400 to 600 ppm.

  There are four types of tocopherols, α-tocopherol, β-tocopherol, γ-tocopherol and δ-tocopherol. In the present invention, the δ-tocopherol content in the oil phase needs to be 200 ppm or more. The total amount of tocopherol in the oil phase is preferably 2000 ppm or less. The ratio of the amount of δ-tocopherol to the total amount of α-tocopherol and β-tocopherol (δ / (α + β): mass ratio) is preferably larger than 2 in terms of flavor improvement and cost, and 2.5 -20, in particular 3-10, in particular 4-8 are preferred.

  In addition, the oil phase of the food of the present invention contains 0.05 to 4.7% by mass, particularly 0.05 to 4.0% by mass of plant sterol, in order to impart a blood cholesterol lowering effect. preferable. Examples of plant sterols include free forms such as α-sitosterol, β-sitosterol, stigmasterol, campesterol, α-sitostanol, β-sitostanol, stigmasteranol, campestanol, and cycloartenol, and the like. And fatty acid esters, ferulic acid esters, cinnamic acid esters and the like.

  Furthermore, the oil phase of the food of the present invention may contain antioxidants such as BHT, BHA, TBHQ and phospholipid; sucrose fatty acid ester, polyglycerin fatty acid ester, succinic acid monoglyceride and the like.

  The mass ratio of the oil phase to the aqueous phase in the food of the present invention is preferably 1:99 to 99: 1, more preferably 5:95 to 90:10, and the ratio is more preferably selected appropriately depending on the form of the food. For example, in the case of oil-in-water type oil-and-fat processed foods such as drinks, desserts, ice creams, dressings, toppings, mayonnaise, coffee whiteners, whipped creams, soups, sauces, sauces of grilled meat, etc., 1: 99-80: 20, especially 20 : 80-75: 25 is preferable. In the case of water-in-oil type processed foods such as margarine, spread, butter cream and the like, 10:90 to 99: 1, particularly 35:65 to 85:15 is preferable.

  In addition, according to the purpose of the food, the aqueous phase of the food of the present invention is water; vinegar such as rice vinegar, sake lees vinegar, apple vinegar, grape vinegar, grain vinegar, synthetic vinegar; salt; seasoning such as sodium glutamate; Sugar, sugar syrup and other sugars; taste amount of sake, mirin, etc .; various vitamins; organic acids such as citric acid and their salts; spices; juices of various vegetables or fruits such as lemon juice; xanthan gum, gellan gum, guar gum, tamarind Thickening polysaccharides such as gum, carrageenan, pectin and tragacanth gum; starches such as potato starch, their degradation products and modified starches; synthesis of sucrose fatty acid ester, sorbitan fatty acid ester, polyglycerin fatty acid ester, polysorbate, etc. Protein milk such as emulsifier, soy protein, milk protein, wheat protein, etc., or separated or decomposed products of these proteins Agent, lecithin or a natural emulsifier of the enzymatic decomposition products or the like; can contain various phosphates and the like; dairy milk and the like.

  The food of the present invention can be produced by mixing the oil phase and the aqueous phase and emulsifying as necessary.

Test example 1
The oil phase component and water phase using the diglyceride-containing fats and oils shown in Table 1 were mixed to produce a dressing. The obtained dressing was stored at 50 ° C. for 4 weeks, and the flavor was evaluated. The results are shown in Table 2.

[Flavor evaluation method]
The stored dressing was sampled with lettuce, and the degree of taste deterioration was evaluated by 10 professional evaluation panelists based on the following criteria, and the average value was obtained.
Evaluation criteria: 10: No difference in taste, 9: Subtle but slightly deteriorated, 8: Slightly degraded, 7: Slightly degraded 6: Deterioration is observed 5: Deterioration is clearly recognized 4: Clearly deteriorated 3: Slightly significant deterioration is observed 2: Remarkable deterioration is observed 1: Deterioration is remarkable

  As is clear from Table 2, in the food containing the diglyceride-containing oil and fat and the aqueous phase, the comparative product (No. 1 and 2) contains L-ascorbic acid fatty acid ester and produces an unpleasant taste (metallic taste) by storage. In the product of the present invention (No. 3), it is understood that the flavor deterioration is suppressed and the flavor is improved.

Test example 2
The oil phase component and the aqueous phase described in Table 3 were mixed to produce a dressing. The obtained dressing was stored at room temperature under a fluorescent lamp for 15 days (720,000 lux), and the flavor was evaluated. The results are shown in Table 3.

  From Table 3, the product of the present invention (Nos. 5 to 8), compared to the comparative product (No. 4) with less δ-tocopherol content than specified, is suppressed in flavor deterioration due to long-term storage under fluorescent light, and the occurrence of off-flavors, It can be seen that the flavor is improved.

Claims (3)

  A method for inhibiting flavor deterioration of a food comprising an aqueous phase and an oil phase containing a diglyceride, wherein the diglyceride content in the oil phase is 15% by mass or more, and 80% by mass or more of the constituent fatty acids of the diglyceride is unsaturated fatty acid. And a flavor deterioration inhibiting method characterized by being substantially free of L-ascorbic acid fatty acid ester.   Furthermore, the flavor deterioration suppression method of Claim 1 which contains (delta) -tocopherol 200ppm or more.   A food comprising an aqueous phase and an oil phase containing diglyceride, wherein the diglyceride content in the oil phase is 15% by mass or more, and 80% by mass or more of the constituent fatty acids of the diglyceride is an unsaturated fatty acid, A food comprising 200 ppm or more of tocopherol and substantially free of L-ascorbic acid fatty acid ester.