JP4491527B2 - 食肉中の遊離グルタミン酸量の増加方法及びそのための飼料 - Google Patents
食肉中の遊離グルタミン酸量の増加方法及びそのための飼料 Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/70—Feeding-stuffs specially adapted for particular animals for birds
- A23K50/75—Feeding-stuffs specially adapted for particular animals for birds for poultry
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
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- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
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Description
図2は、本発明の方法により遊離グルタミン酸濃度が増加されたニワトリの食肉と、従来の方法により飼育されたニワトリの食肉の味に差があるか否かの官能試験の結果を示す図である。
図3は、本発明の方法により遊離グルタミン酸濃度が増加されたニワトリの食肉の味の特徴を、従来の方法により飼育されたニワトリの食肉との比較により官能試験で調べた結果を示す図である。
図4は、高タンパク含量の飼料であって、異なるロイシン含量の飼料を給与した場合の、飼料中のロイシン含量と、筋肉中の遊離グルタミン酸濃度の関係を示す図である。
図5は、高蛋白飼料を用いた場合の、本発明の方法により遊離グルタミン酸濃度が増加されたニワトリの食肉と、従来の方法により飼育されたニワトリの食肉の味に差があるか否かの官能試験の結果を示す図である。
図6は、高蛋白飼料を用いた場合の、本発明の方法により遊離グルタミン酸濃度が増加されたニワトリの食肉の味の特徴を、従来の方法により飼育されたニワトリの食肉との比較により官能試験で調べた結果を示す図である。
図7は、本発明の方法により、遊離グルタミン酸濃度が増加することの、動物体内での調節機構について示した図である。
図8は、図7で示した調節機構において、本発明の方法により、遊離グルタミン酸濃度が増加されたニワトリの筋肉のグルタミン酸デヒドロゲナーゼの酵素活性を、従来の方法により飼育されたニワトリの筋肉との比較により調べた結果を示す図である。
(1) アミノ酸分析のためのタンパク質分解処理法
粉砕器を用いて、試料を粉砕する。粉状の飼料を試験管に測り取り、6N塩酸を加え、110℃の分解炉にセットし、22時間加水分解する。加水分解後、速やかに試験管を外す。吸引ろ過装置を用いて加水分解物をろ過し、ろ液に5N水酸化ナトリウム溶液を加えて中和する。反応熱が収まり室温に戻ったら、超純水で定量する。これを高速液体クロマトグラフィーによるアミノ酸分析に用いた。
(2) 高速液体クロマトグラフィーによるアミノ酸分析
ナトリウム型のカラムを用いる。移動相は、A液:0.2Nクエン酸ナトリウム溶液(7%エタノールを含む、pH3.20)、B液:0.2Mホウ酸を含む0.6Nクエン酸ナトリウム溶液(pH10.0)、及びC液:0.2M水酸化ナトリウム溶液とし、高速液体クロマトグラフィーで飼料中のロイシン含量を測定する。
各群12羽のニワトリに対し、4週齢〜屠殺直前までの10日間、飼料1(実施例1)、飼料2(実施例2)、飼料3(比較例1)及び飼料4(比較例2)のいずれかを継続的に給与した。飼料1、飼料2、飼料3及び飼料4中のロイシン含量は、それぞれ、0.76重量%、1.09重量%、1.42重量%及び1.64重量%であった。各飼料の組成を以下に示す。
(代謝エネルギー3.2kcal/g、粗タンパク質11.7%、ロイシン0.763%)
(代謝エネルギー3.2kcal/g、粗タンパク質12.0%、ロイシン1.09%)
(代謝エネルギー3.2kcal/g、粗タンパク質12.2%、ロイシン1.42%)
(代謝エネルギー3.2kcal/g、粗タンパク質12.3 %、ロイシン1.64%)
実施例1及び比較例1で得られた食肉の食味について官能試験を行った。調査した肉は、ロイシン含量0.76重量%の飼料1(実施例1)を給与したニワトリの肉及び、ロイシン含量1.42重量%の飼料3(比較例1)を給与したニワトリの肉である。パネラーの数は12名であり、(1)両者の肉の食味に差があるか否かを二点比較法により調査し、また、(2)肉の味の特徴をシェッフェーの一対比較法(文献:(1)新版官能検査ハンドブック、日科技連官能検査委員会、日科技連出版社、1973年、(2)Effect of Restricted Feeding before Marketing on Taste Active Components of Broiler Chickens Shinobu FUJIMURA, Fumiaki SAKAI, Motoni KADOWAKI, Animal Science Journal, 72(3), P223-229, 2001)により比較した。
各群12羽のニワトリに対し、4週齢〜屠殺直前までの10日間、飼料5(実施例4)、飼料6(比較例4)及び飼料7(比較例5)のいずれかを継続的に給与した。飼料5、飼料6及び飼料7中のロイシン含量は、それぞれ、1.09重量%、1.42重量%及び1.64重量%であった。各飼料の組成を以下に示す。
(代謝エネルギー3.2kcal/g、粗タンパク質18.2%、ロイシン1.09%)
(代謝エネルギー3.2kcal/g、粗タンパク質18.4%、ロイシン1.42%)
(代謝エネルギー3.2kcal/g、粗タンパク質18.6%、ロイシン1.42%)
Claims (3)
- ニワトリ又はブタに、NRC飼料標準によるロイシン要求量の70%以上120%未満のロイシンを含む低ロイシン含量の飼料を給与することから成る、ニワトリ又はブタの食肉中の遊離グルタミン酸量の増加方法。
- ニワトリの食肉中の遊離グルタミン酸量の増加方法である請求項1記載の方法。
- 飼料中のロイシン含量が、屠殺時の週齢が3週齢以上6週齢未満の場合には0.76重量%以上1.30重量%未満、6週齢以上の場合には0.65重量%以上1.12重量%未満である請求項2記載の方法。
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JP2003208474 | 2003-08-22 | ||
JP2003208474 | 2003-08-22 | ||
PCT/JP2004/003757 WO2005018315A1 (ja) | 2003-08-22 | 2004-03-19 | 食肉中の遊離グルタミン酸量の増加方法及びそのための飼料 |
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AU (1) | AU2004266513A1 (ja) |
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WO (1) | WO2005018315A1 (ja) |
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US4883817A (en) * | 1987-03-02 | 1989-11-28 | Iowa State University Research Foundation, Inc. | Raising chickens for meat production with ketoisocaproate-containing feeds |
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2004
- 2004-03-19 US US10/568,782 patent/US20070092599A1/en not_active Abandoned
- 2004-03-19 WO PCT/JP2004/003757 patent/WO2005018315A1/ja active Application Filing
- 2004-03-19 AU AU2004266513A patent/AU2004266513A1/en not_active Abandoned
- 2004-03-19 CA CA002555997A patent/CA2555997A1/en not_active Abandoned
- 2004-03-19 JP JP2005513237A patent/JP4491527B2/ja not_active Expired - Fee Related
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WO2005018315A1 (ja) | 2005-03-03 |
US20070092599A1 (en) | 2007-04-26 |
AU2004266513A1 (en) | 2005-03-03 |
CA2555997A1 (en) | 2005-03-03 |
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