JP3581818B2 - Antioxidant fish oil - Google Patents

Antioxidant fish oil Download PDF

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JP3581818B2
JP3581818B2 JP2000147159A JP2000147159A JP3581818B2 JP 3581818 B2 JP3581818 B2 JP 3581818B2 JP 2000147159 A JP2000147159 A JP 2000147159A JP 2000147159 A JP2000147159 A JP 2000147159A JP 3581818 B2 JP3581818 B2 JP 3581818B2
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Prior art keywords
dha
weight
oil
feed
added
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JP2001323295A (en
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眞 小田切
勝己 荒井
稔 大井川
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ISE FOODS Inc
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ISE FOODS Inc
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Description

【0001】
【発明の属する技術分野】
本発明は抗酸化魚油、特にDHA(ドコサヘキサエン酸)油に応用することができる抗酸化魚油に関するものである。
【0002】
【従来の技術】
従来から、魚油は種々の分野で広く用いられていた。
このような魚油の中で、近年健康によいとして、DHA油が用いられてきた。そこで従来から、鶏卵中にDHAを含有させることで、鶏卵の摂取に伴い体内にDHAを吸収させようとすることが行われてきた。特に、鶏卵の摂取に伴って、DHAの作用で総コレステロール値及び中性脂肪の低下が図られてきた。
【0003】
ただ、DHA油は、特に酸化が激しく、N2ガスシールを行った状態であっても、1週間経過によって、そのままでは3.0meq/kgが24.8meq/kgとなってしまっていた。また抗酸化剤としての、ビタミンEおよびエトキシンを添加し、同一のシール条件で測定しても、1週間経過で8.8meq/kgとなってしまった。
【0004】
【発明が解決しようとする課題】
そこで本発明は、魚油、特にDHA油に抗酸化作用を付加し、劣化の少ない魚油を提供することを目的とする。
【0005】
【課題を解決するための手段】
前述した目的を達成するために、本発明は、DHA含有量23.3〜26.3重量%の精製魚油に、エトキシンを0.1〜0.3重量%、ビタミンEを0.3〜0.5重量%及びレシチンを0.5〜1.0重量%添加したことを特徴とする。
【0006】
【発明の実施の形態】
以下、図1にしたがって、魚油の精製から、この魚油を添加した飼料を作り、そのDHA添加飼料を鶏に摂取させ、摂取させた鶏の鶏卵にDHAを移行させるまでの課程を説明する。
(原油)
まず最初に適正な原油を得るために加温してのブレンドを行う。ここでブレンドとは、原油中のDHA含有量を一定に保つために行うものである。
【0007】
例えば、飼料中に原油を一定量添加することによって、飼料に対して常に同一量のDHAを添加できるようにするために行うものである。
魚油中のDHA含有量は、異なった種類の魚についての数値が異なっているだけでなく、同一種の魚についても個体差によって異なっている。
ちなみに、マグロ油とカツオ油とについて、DHA含有量を測定した結果を、表1に示す。
【0008】
【表1】

Figure 0003581818
【0009】
このようにDHA含有量が異なっているために、DHA含有量を一定に保持するために、ブレンドが行われるものである。もちろん、ブレンドしなくとも、DHA含有量が所定の範囲にある場合には、このブレンドを省略することもできる。
なお、このブレンドによって、DHA含有量は、23.2%〜26.3%の範囲に調整される。
【0010】
またこのときの他の有効成分は下記の通りの含有量となっている。
DHA含有量 23.3%〜26.3%
エトキシン含有量 0.1%
レシチン含有量 0.5%
ビタミンE含有量 0.3%
(湯洗)
次に、原油の湯洗が行われる。
【0011】
この湯洗は、原油中の不純物の除去を目的として行うものである。
具体的には、70℃程度の湯水を用い、原油と湯水との比率を、90:10とした上で、65〜70℃に保った状態で、10000rpmの遠心分離機に6秒間かけて行うものである。
なおのような湯洗が終了した後に、リン酸を原油に対して0.02重量%添加する。ここで、リン酸を添加するのは、次の脱ガム処理のための前処理として行うものである。また、リン酸としては、武田薬品工業(株)のリン酸を用いた。(脱ガム処理)
この脱ガム処理は、原油中からリン脂質等のガム質を除去するために行うものである。
【0012】
具体的には、65〜70℃に保った状態で、10000rpmの遠心分離機に6秒間かけて行うものである。
なおのような脱ガム処理が終了した後に、50%NaOH溶液を原油に対して規定量添加する。ここで、50%NaOH溶液を添加するのは、次の脱酸処理のための前処理として行うものである。また、NaOH溶液としては、ソーダニッカ(株)の苛性ソーダを用いた。
(脱酸処理)
この脱酸処理は、原油中から遊離脂肪酸を除去するために行うものである。
【0013】
具体的には、75〜80℃に保った状態で、6秒間かけて行うものである。
(遠心分離)
この遠心分離は、原油中から必要とされる上澄油を取り出すために行うものである。
【0014】
具体的には、75〜80℃に保った状態で、10000〜12000rpmの遠心分離機に6秒間かけて行うものである。
(湯洗)
この湯洗は、油中に残存するアルカリ分を除去するために行うものである。
【0015】
具体的には、80℃程度の湯水を用い、原油と湯水との比率を、90:10とした上で、75〜80℃に保った状態で、10000〜12000rpmの遠心分離機に6秒間かけて行うものである。
(脱水)
この脱水は、混入している微量の水分を除去するために行うものである。
【0016】
具体的には、加熱しながら負圧状態を維持するバキュームドライヤーを6秒間かけて行うものである。
(脱色処理)
この脱色処理は、油中の色素あるいはその他の夾雑物の除去を目的として行うものである。
【0017】
具体的には、活性白土を油に対して2〜3重量%添加し、温度を110〜120℃にして6秒間維持し、その後100〜200メッシュのフィルターを通すことによって行う。また、活性白土としては、水澤化学工業(株)のガレオンアースV1を用いた。
(濾過)
この濾過は、夾雑物等の完全除去のために行われるものである。
【0018】
具体的には、圧力を加えてフィルターを通すチェックフィルター式により行う。フィルターのメッシュは200メッシュである。
(抗酸化剤添加)
この抗酸化剤添加は、本発明のポイントとなる部分であり、油の酸化を防止するために行うものである。
【0019】
なお、油のみの状態であると、酸化状況を示すPOVの値が、当初3.0であったものが1週間で24.8になってしまう。
具体的には、油に対して、エトキシン0.1重量%、ビタミンE0.3重量%、レシチン0.5重量%添加することによって行う。
ここで、エトキシン、ビタミンEは自動酸化の連鎖反応を抑制するラジカル阻害剤として機能する。一方、レシチンは、それ自体酸化防止作用を有するものではないが、ラジカル阻害剤と共存して、その作用を増加させる相乗剤(シネルギスト)として機能する。
【0020】
ちなみに、下記の条件で各試料の酸化を測定した結果を表2に示す。
条件
容 器:ガラス瓶(N2 ガスシール)
温 度:37℃
測定項目:POV(meq/kg)
試料
(1)DHA油
(2)DHA油+ビタミンE(0.3重量%)
(3)DHA油+エトキシン(0.1重量%)
(4)DHA油+ビタミンE(0.3重量%)+エトキシン(0.1重量%)
(5)DHA油+ビタミンE(0.3重量%)+レシチン(0.5重量%)
(6)DHA油+エトキシン(0.1重量%)+レシチン(0.5重量%)
(7)DHA油+ビタミンE(0.2重量%)+エトキシン(0.1重量%)+レシチン(0.3重量%)
(8)DHA油+ビタミンE(0.3重量%)+エトキシン(0.1重量%)+レシチン(0.5重量%)
(9)DHA油+ビタミンE(0.5重量%)+エトキシン(0.3重量%)+レシチン(1.0重量%)
(10)DHA油+ビタミンE(1.0重量%)+エトキシン(0.5重量%)+レシチン(2.0重量%)
【0021】
【表2】
Figure 0003581818
【0022】
この表2からも、エトキシン、ビタミンEの添加だけでなく、同時にレシチンを添加することの効果が確認できた。
なおここで、前記各添加物の油に対する添加量としては、下記の範囲で有効であることが確認された。
エトキシン 0.1 〜 0.3 重量%
ビタミンE 0.3 〜 0.5 重量%
レシチン 0.5 〜 1.0 重量%
ここで、各々低値以下の場合、添加効果が期待できないものである。また高値以上になると、効果はあるものの、増量させた添加量に見合った効果が期待できないので、添加物が無駄になるものである。
【0023】
またここで、エトキシンは精工化学(株)のエトキシンを、ビタミンEは理研ビタミン(株)の理研Eオイル600を、レシチンはツルーレシチン工業(株)のペーストNPを、それぞれ使用した。
(製品)
抗酸化剤を添加した後は、製品として出荷できるようになる。ここでの出荷は、容器詰め、ドラム缶詰めあるいはタンクローリーでの出荷等があるものの、いずれも保管時あるいは輸送時の酸化を防止するために窒素ガスパージが行われる。
(飼料工場での飼料への配合)
ここでは、主原料タンク、副原料タンク及びその他のタンクの収納物を、計量し、必要量ホッパに投入し、メーンミキサーにて撹拌することにより、飼料中にDHAを添加させるものである。
【0024】
なお、飼料の一例として、重量%で示した配合割合を含めて、表3のように調合した。
【0025】
【表3】
Figure 0003581818
【0026】
またこのようなDHA配合飼料と、動物性油脂を加えていない一般飼料中との脂肪酸組成を調べた。その結果を「表4」に示す。
【0027】
【表4】
Figure 0003581818
【0028】
この結果から、ミリスチン酸、アラキド酸が、DHA配合飼料の使用によって、含有量が数倍になったことがわかるが、更に、エイコサペンタエン酸が20倍程度、ドコサヘキサエン酸が50倍以上となっていることがわかる。
(鶏卵農場へ輸送)
配合された飼料をバルク車にて農場に輸送し、飼料タンクへ入庫する。
【0029】
ここでは、1鶏舎に2本の15t飼料タンクがあり、飼料の劣化を防止するために一方を使い切った後に他方を使用するようにしている。このような使い方をしているものの、1タンクが約2.5〜3日で使用してしまった。
(計量及び給餌)
飼料ロードセルによって計量し、所定量の餌を公知の自動給餌機を用いて給餌する。
(採卵)
採卵した卵を分析して、DHAの移行チェック等を行った。その結果を表5に示す。
【0030】
なおここでは、250日令の鶏に、「表3」に示したと同様のDHA配合飼料を与えた後、所定週目の鶏卵へのDHAの移行を測定したものである。
またここで、各数字は、鶏卵の可食部100gあたりのDHA量を示したものである。
【0031】
【表5】
Figure 0003581818
【0032】
また、添加後の日令が長い例について、「表6」に示す。
【0033】
【表6】
Figure 0003581818
【0034】
この「表5」及び「表6」から、DHA添加飼料を用いた場合、添加開始から少なくとも3週目乃至4週目で、DHAを鶏卵にほぼ一定の量だけ含有させることが可能であった。更に、DHA添加飼料を長期間添加した場合であっても、鶏卵中のDHAの量はほぼ一定に保たれることがわかった。
また、「表5」と同様の測定を、飼料中のDHA添加量を変化させて測定したものを「表7」に示す。
【0035】
【表7】
Figure 0003581818
【0036】
この測定結果から、飼料中のDHA添加量が増加すると、鶏卵中のDHA含有量も増加することがわかった。ただ、飼料中への添加量と、鶏卵中への含有量とは、比例関係でなく、上記結果及び上記した以外の添加量を含めた実験から、飼料中のDHA添加量は、1.2%程度がもっとも添加効率がよいことがわかった。
【0037】
即ち、1.2%添加に対して、ほぼ倍の2.3%添加した場合であっても、DHAの鶏卵への移行は1.4倍程度でとどまっている。これは、DHA配合飼料中のDHAが排泄されてしまいことと思われる。
したがって、経済効率から見て、前記1.2%程度が望ましい配合量であると思われる。
なお、「表3」と同様の配合飼料を鶏に与え始めてから、少なくとも4週間以上経過した鶏卵の卵黄中の、脂肪酸含有量を測定した。ここで、卵黄を対象として測定したのは、脂肪酸の多くが卵黄中に含有されるためである。
【0038】
その結果を「表8」に示す。
【0039】
【表8】
Figure 0003581818
【0040】
この結果から、DHA配合飼料を用いると、卵黄中のDHA含有量が4倍以上となることがわかった。
また、同様の飼料を与えた鶏の血清中のグルコース、総コレステロール、総タンパク質、中性脂肪について、一般飼料を与えた鶏と比較した。その結果を「表9」に示す。
【0041】
【表9】
Figure 0003581818
【0042】
この結果から、DHA配合飼料を用いると、総コレステロール、中性脂肪が低下するので、鶏にとっても良いことがわかった。
なお、DHAは臭いがついているものである。
そこで、鶏あるいは鶏卵ががその臭いによって、悪影響を受けたか否かを調べた。その結果を「表10」「表11」に示す。
【0043】
【表10】
Figure 0003581818
【0044】
【表11】
Figure 0003581818
【0045】
個々に若干のばらつきはあるものの、DHA添加飼料と一般飼料とでは、個卵重、産卵率、鶏体重、1日の食下量に大きな変化がなかった。したがって、鶏卵にDHAを含有させるために鶏に臭いのあるDHA添加飼料を与えても、鶏あるいは産卵及び鶏卵自体に外的な大きな変化はなかった。
【0046】
【発明の効果】
以上説明したように、本発明は、魚油、特にDHA油に抗酸化作用を付加し、劣化の少ない魚油を提供するものである。
【図面の簡単な説明】
【図1】原油から採卵までの概略を示したフローチャートである。[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an antioxidant fish oil which can be applied to an antioxidant fish oil, particularly DHA (docosahexaenoic acid) oil.
[0002]
[Prior art]
Conventionally, fish oil has been widely used in various fields.
Among such fish oils, DHA oil has recently been used as being good for health. Therefore, it has heretofore been attempted to incorporate DHA into chicken eggs so that DHA can be absorbed into the body as chicken eggs are ingested. In particular, with the ingestion of chicken eggs, total cholesterol levels and neutral fats have been reduced by the action of DHA.
[0003]
However, DHA oil was particularly highly oxidized, and even after N2 gas sealing was performed, 3.0 meq / kg was changed to 24.8 meq / kg as it was after one week. Even when vitamin E and ethoxin as antioxidants were added and measured under the same sealing conditions, the value was 8.8 meq / kg after one week.
[0004]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to provide a fish oil, particularly a DHA oil, which has an antioxidant effect and has a low deterioration.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides a purified fish oil having a DHA content of 23.3 to 26.3% by weight, 0.1 to 0.3% by weight of etoxin and 0.3 to 0% of vitamin E. It is characterized by adding 0.5% by weight and 0.5 to 1.0% by weight of lecithin.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
In the following, the process from purification of fish oil to preparation of a feed to which this fish oil is added, ingestion of the DHA-added feed to chickens, and transfer of DHA to eggs of the ingested chickens will be described with reference to FIG.
(crude oil)
First of all, blending is performed by heating to obtain an appropriate crude oil. Here, blending is performed in order to keep the DHA content in crude oil constant.
[0007]
For example, the method is carried out so that the same amount of DHA can always be added to the feed by adding a certain amount of crude oil to the feed.
The DHA content in fish oil is not only different for different types of fish, but also for the same species of fish due to individual differences.
Incidentally, Table 1 shows the results of measuring the DHA content of tuna oil and bonito oil.
[0008]
[Table 1]
Figure 0003581818
[0009]
Since the DHA content is different as described above, blending is performed to keep the DHA content constant. Of course, if the DHA content is within a predetermined range without blending, this blending can be omitted.
In addition, this blend adjusts the DHA content to a range of 23.2% to 26.3%.
[0010]
The other active ingredients at this time have the following contents.
DHA content 23.3% to 26.3%
Etoxin content 0.1%
Lecithin content 0.5%
Vitamin E content 0.3%
(Washing)
Next, the crude oil is washed with hot water.
[0011]
This hot water washing is performed for the purpose of removing impurities in crude oil.
Specifically, using hot water at about 70 ° C., the ratio of crude oil to hot water is set to 90:10, and the mixture is kept at 65 to 70 ° C. in a centrifuge at 10,000 rpm for 6 seconds. Things.
After the completion of such hot water washing, 0.02% by weight of phosphoric acid is added to the crude oil. Here, the addition of phosphoric acid is performed as a pretreatment for the next degumming treatment. Further, as the phosphoric acid, phosphoric acid manufactured by Takeda Pharmaceutical Co., Ltd. was used. (Degumming treatment)
This degumming treatment is performed to remove gums such as phospholipids from crude oil.
[0012]
Specifically, it is performed in a centrifuge at 10,000 rpm for 6 seconds while maintaining the temperature at 65 to 70 ° C.
After the completion of the degumming treatment, a specified amount of a 50% NaOH solution is added to the crude oil. Here, the addition of the 50% NaOH solution is performed as a pretreatment for the next deoxidation treatment. Further, as the NaOH solution, caustic soda of Sodanikka Co., Ltd. was used.
(Deoxidation treatment)
This deacidification treatment is performed in order to remove free fatty acids from crude oil.
[0013]
Specifically, this is performed over 6 seconds while maintaining the temperature at 75 to 80 ° C.
(Centrifugation)
This centrifugation is performed to take out the required supernatant oil from the crude oil.
[0014]
Specifically, it is carried out in a centrifuge at 10,000 to 12000 rpm for 6 seconds while maintaining the temperature at 75 to 80 ° C.
(Washing)
This hot water washing is performed to remove the alkali remaining in the oil.
[0015]
Specifically, using hot water at about 80 ° C., the ratio of crude oil to hot water is set to 90:10, and the mixture is centrifuged at 10,000 to 12000 rpm for 6 seconds while maintaining the temperature at 75 to 80 ° C. It is done.
(dehydration)
This dehydration is performed in order to remove a small amount of water mixed in.
[0016]
Specifically, a vacuum dryer that maintains a negative pressure state while heating is performed over 6 seconds.
(Decolorization processing)
This decolorization treatment is performed for the purpose of removing pigments and other contaminants in the oil.
[0017]
Specifically, activated clay is added to the oil in an amount of 2 to 3% by weight, the temperature is kept at 110 to 120 ° C., and the temperature is maintained for 6 seconds, and thereafter, the mixture is passed through a 100 to 200 mesh filter. As the activated clay, Galleon Earth V1 manufactured by Mizusawa Chemical Industry Co., Ltd. was used.
(filtration)
This filtration is performed to completely remove impurities and the like.
[0018]
Specifically, the check is performed by a check filter system in which pressure is applied and a filter is passed. The mesh of the filter is 200 mesh.
(Add antioxidant)
This addition of an antioxidant is a key point of the present invention and is performed to prevent oxidation of the oil.
[0019]
In the case of oil only, the POV value indicating the oxidation state was initially 3.0 but changed to 24.8 in one week.
Specifically, it is carried out by adding 0.1% by weight of etoxin, 0.3% by weight of vitamin E, and 0.5% by weight of lecithin to the oil.
Here, etoxin and vitamin E function as radical inhibitors that suppress the chain reaction of autoxidation. On the other hand, lecithin does not itself have an antioxidant effect, but functions as a synergist (synergist) that increases its effect in the presence of a radical inhibitor.
[0020]
Table 2 shows the results of measuring the oxidation of each sample under the following conditions.
Condition container: glass bottle (N2 gas seal)
Temperature: 37 ° C
Measurement item: POV (meq / kg)
Sample (1) DHA oil (2) DHA oil + vitamin E (0.3% by weight)
(3) DHA oil + etoxin (0.1% by weight)
(4) DHA oil + Vitamin E (0.3% by weight) + Etoxin (0.1% by weight)
(5) DHA oil + vitamin E (0.3% by weight) + lecithin (0.5% by weight)
(6) DHA oil + etoxin (0.1% by weight) + lecithin (0.5% by weight)
(7) DHA oil + Vitamin E (0.2% by weight) + Etoxin (0.1% by weight) + Lecithin (0.3% by weight)
(8) DHA oil + Vitamin E (0.3% by weight) + Etoxin (0.1% by weight) + Lecithin (0.5% by weight)
(9) DHA oil + Vitamin E (0.5% by weight) + Etoxin (0.3% by weight) + Lecithin (1.0% by weight)
(10) DHA oil + Vitamin E (1.0% by weight) + Etoxin (0.5% by weight) + Lecithin (2.0% by weight)
[0021]
[Table 2]
Figure 0003581818
[0022]
Table 2 also confirms the effect of adding lecithin at the same time as adding etoxin and vitamin E.
Here, it was confirmed that the amount of each additive to be added to the oil was effective in the following range.
Etoxin 0.1-0.3% by weight
Vitamin E 0.3-0.5% by weight
Lecithin 0.5-1.0% by weight
Here, when each of them is lower than the low value, the effect of addition cannot be expected. On the other hand, if the value is higher than the high value, although there is an effect, an effect commensurate with the added amount cannot be expected, so that the additive is wasted.
[0023]
Here, etoxin used was etoxin manufactured by Seiko Chemical Co., Ltd., vitamin E used was RIKEN E Oil 600 manufactured by Riken Vitamin Co., Ltd., and lecithin used was Paste NP manufactured by True Lecithin Industry Co., Ltd.
(Product)
After adding the antioxidant, it can be shipped as a product. The shipment here includes packing in containers, drums, or shipping in tank lorries. In any case, nitrogen gas purge is performed to prevent oxidation during storage or transportation.
(Blending to feed at the feed factory)
Here, DHA is added to the feed by weighing the contents of the main raw material tank, the auxiliary raw material tank, and other tanks, putting them in a required amount in a hopper, and stirring them with a main mixer.
[0024]
In addition, as an example of the feed, it was prepared as shown in Table 3, including the mixing ratio shown in% by weight.
[0025]
[Table 3]
Figure 0003581818
[0026]
Further, the fatty acid composition of such a DHA-containing feed and a general feed to which no animal fat was added was examined. The results are shown in Table 4.
[0027]
[Table 4]
Figure 0003581818
[0028]
From this result, it can be seen that the contents of myristic acid and arachidic acid have been several times increased by using the DHA-containing feed, but the eicosapentaenoic acid has been increased by about 20 times and the docosahexaenoic acid has been increased by 50 times or more. You can see that there is.
(Transport to chicken egg farm)
The formulated feed is transported to the farm by a bulk vehicle and stored in the feed tank.
[0029]
Here, there are two 15-ton feed tanks in one poultry house, and one is used up and the other is used to prevent deterioration of the feed. Despite this use, one tank was used in about 2.5 to 3 days.
(Weighing and feeding)
The food is weighed by a feed load cell, and a predetermined amount of food is fed using a known automatic feeder.
(Egg collection)
The collected eggs were analyzed to check the transfer of DHA. Table 5 shows the results.
[0030]
In addition, here, after feeding the same DHA-containing feed as shown in "Table 3" to a 250-day-old chicken, the transfer of DHA to the egg at a predetermined week was measured.
Here, each number indicates the amount of DHA per 100 g of edible portion of chicken eggs.
[0031]
[Table 5]
Figure 0003581818
[0032]
In addition, Table 6 shows examples in which the age after addition is long.
[0033]
[Table 6]
Figure 0003581818
[0034]
From Tables 5 and 6, it was found that when the DHA-added feed was used, at least 3 to 4 weeks after the start of the addition, DHA could be contained in chicken eggs in a substantially constant amount. . Furthermore, it was found that the amount of DHA in chicken eggs was kept substantially constant even when the DHA-added feed was added for a long time.
In addition, Table 7 shows the same measurement as in Table 5 with the amount of DHA added in the feed varied.
[0035]
[Table 7]
Figure 0003581818
[0036]
From this measurement result, it was found that when the amount of DHA added to the feed increased, the DHA content in the eggs also increased. However, the amount of DHA added to the feed was not proportional to the amount added to the egg, and from the above results and experiments including the amount of addition other than the above, the amount of DHA added to the feed was 1.2%. % Was found to have the best addition efficiency.
[0037]
That is, even when 2.3% is added, which is almost twice as much as 1.2% addition, the transfer of DHA to chicken eggs is only about 1.4 times. This seems to be because DHA in the DHA-containing feed was excreted.
Therefore, from the viewpoint of economic efficiency, it is considered that about 1.2% is a desirable compounding amount.
In addition, the fatty acid content in the yolk of the hen's egg which passed for at least 4 weeks or more after starting to give the same compound feed as the "Table 3" to the chicken was measured. Here, the measurement was performed on the yolk because many of the fatty acids are contained in the yolk.
[0038]
The results are shown in "Table 8".
[0039]
[Table 8]
Figure 0003581818
[0040]
From these results, it was found that the use of the DHA-containing feed increased the DHA content in the yolk by at least four times.
In addition, the serum, glucose, total cholesterol, total protein, and neutral fat in the sera of chickens fed the same feed were compared with those of the chickens fed the general feed. The results are shown in "Table 9".
[0041]
[Table 9]
Figure 0003581818
[0042]
From these results, it was found that the use of the DHA-combined feed reduced total cholesterol and neutral fat, which was good for chickens.
DHA has an odor.
Therefore, it was examined whether chickens or eggs were adversely affected by the smell. The results are shown in "Table 10" and "Table 11".
[0043]
[Table 10]
Figure 0003581818
[0044]
[Table 11]
Figure 0003581818
[0045]
Although there was some variation among the individual feeds, there was no significant change in the egg weight, egg production rate, chicken weight, and daily food consumption between the DHA-added feed and the general feed. Therefore, even if the chicken was fed with the odor-containing DHA-added feed so that the egg contained DHA, there was no significant external change in the chicken or the eggs and the eggs themselves.
[0046]
【The invention's effect】
As described above, the present invention is to provide a fish oil, in particular, a DHA oil, which has an antioxidant effect and has less deterioration.
[Brief description of the drawings]
FIG. 1 is a flowchart showing an outline from crude oil to egg collection.

Claims (1)

DHA含有量23.3〜26.3重量%の精製魚油に、エトキシンを0.1〜0.3重量%、ビタミンEを0.3〜0.5重量%及びレシチンを0.5〜1.0重量%添加したことを特徴とする抗酸化魚油。  In a purified fish oil having a DHA content of 23.3 to 26.3% by weight, etoxin is 0.1 to 0.3% by weight, vitamin E is 0.3 to 0.5% by weight, and lecithin is 0.5 to 1. Antioxidant fish oil characterized by adding 0% by weight.
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EP1727882A4 (en) * 2004-02-06 2008-12-10 Adrien Beaudoin Method for preventing the oxidation of lipids in animal and vegetable oils and compositions produced by the method thereof
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