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JP-2026074567-A - Poultry meat and its production method

JP2026074567AJP 2026074567 AJP2026074567 AJP 2026074567AJP-2026074567-A

Abstract

[Problem] To provide poultry meat and a method for producing it that can reduce the effects of rigor mortis. [Solution] The meat of the bird has had its spinal cord destroyed. The meat of the bird has a K value of 10% to 57% of the total amount of substances converted from adenosine triphosphate to hypoxanthine, and the load when a cylindrical plunger with a diameter of 5 mm is pressed against it at a speed of 1 mm/second is 10.0 N or more. The method of producing the meat of the bird involves applying a tensile force to the neck of the bird to stretch it, and then destroying the spinal cord. [Selection Diagram] Figure 1

Inventors

  • 市川 勝丸

Assignees

  • 有限会社鳥市精肉店

Dates

Publication Date
20260507
Application Date
20241021

Claims (9)

  1. A method for producing meat by applying tensile force to the neck of a bird, stretching the neck, and then destroying the spinal cord.
  2. A method for producing meat according to claim 1, comprising destroying the brain of the bird and then destroying the spinal cord.
  3. A method for producing meat according to claim 1 or 2, wherein the spinal cord of the bird is destroyed after the bird's eyes have been covered.
  4. Meat from a bird with a destroyed spinal cord.
  5. The meat according to claim 4, wherein the nerves extending from the spinal cord towards the tail are further destroyed.
  6. The meat according to claim 4 or 5, wherein the brain is further destroyed.
  7. The meat according to claim 6, having a wound extending from the surface of the head to the brain.
  8. The meat according to claim 4 or 5, having a wound extending from the surface of the neck to the spinal cord.
  9. Meat from birds, where the K value (the ratio of inosine to hypoxanthine in the total amount of substances converted from adenosine triphosphate to hypoxanthine) is between 10% and 57%, and where a cylindrical plunger with a diameter of 5 mm is pressed against the sample at a speed of 1 mm/second, resulting in a load of 10.0 N or more.

Description

This invention relates to poultry meat and a method for producing the same. The process involves slaughtering and butchering birds and processing them for meat production. Patent Document 1 discloses a technique in which, after slaughtering a bird, the carotid artery is severed, and then an electric current is applied to the bird to cause it to lose consciousness and its muscles to convulse, thereby draining the blood. Patent No. 4540075 This is a schematic diagram of a bird in the first embodiment.This is a schematic diagram of a bird in the second embodiment. The following describes preferred embodiments of the present invention with reference to the accompanying drawings. Figure 1 is a schematic diagram of a bird 10 in the first embodiment. In Figure 1, the feathers are omitted, and the bird 10 is shown with its skeleton visible through the glass. The bird 10 comprises a head 11, neck 12, body 13, and tail 14, and sequentially from the head 11 to the tail 14, it includes a skull 15, cervical vertebrae 16, thoracic vertebrae 17, ilium 18, and caudal vertebrae 19. The skull 15 is located inside the head 11, and the cervical vertebrae 16 are located inside the neck 12. The thoracic vertebrae 17 and ilium 18 are located inside the body 13, and the caudal vertebrae 19 are located inside the tail 14. The skull 15 protects the brain 20, and the vertebrae 16 and thoracic vertebrae 17 protect the spinal cord 21. The medulla oblongata of the brain 20 is connected to the spinal cord 21. The medulla oblongata is part of the brain 20 and contains nerves essential for respiration and heartbeat. The brain 20 and spinal cord 21 issue commands to contract skeletal muscles, and these commands are transmitted to the muscles by motor nerves. Nerves 22 extending from the spinal cord 21 toward the tail 19 are located inside the thoracic vertebrae 17 and ilium 18. Nerves 22 are the pathways for nerve signals traveling to and from the legs. Birds 10 include domestic and wild birds such as chickens, ostriches, guinea fowl, turkeys, pigeons, ducks (including mallards, domestic ducks, and hybrid ducks), quail, and pheasants. Examples of meat from birds 10 include thigh meat (biceps femoris), breast meat (superficial pectoralis muscle), tenderloin (deep pectoralis muscle), and wings, but there are no restrictions as long as the meat is intended for consumption. The meat is produced through processes such as slaughtering, feather removal, and internal organ removal of 10 different types of birds. Alternatively, the slaughtered birds may be deboned and butchered by cooks or consumers to separate the meat into thighs, breasts, tenderloins, wings, etc., or the meat producer may debon and butcher the birds and separate the meat into different parts before delivering it to cooks or consumers. To slaughter the bird 10, a tensile force is first applied to its neck 12 to stretch it. One example of a method for applying tensile force to the neck 12 is to support the base of the head 11, suspend the neck 12 and body 13, and utilize gravity to stretch the neck 12 relative to the body 13. Alternatively, while the bird 10 is suspended or lying on a stand (not shown), a mechanical tensile force may be applied between the base of the head 11 and the body 13 to stretch the neck 12 relative to the body 13. After extending the neck 12 of the bird 10, a rigid body (not shown), such as a rod or tube harder than the skull 15, is inserted into the head 11, penetrating the skull 15 and mechanically destroying the medulla oblongata (part of the brain 20). The destruction of the medulla oblongata causes instant death of the bird 10. This instantaneous death reduces the energy expenditure of the bird 10 during death, thereby reducing ATP depletion. It is preferable to blindfold the bird 10 when stretching its neck 12 or after stretching its neck 12. Blinding allows the bird 10 to remain calm before slaughter, reducing stress on the bird 10 during slaughter and further reducing energy expenditure. Therefore, ATP consumption can be further reduced. When a rigid body pierces the head 11 of a bird 10, a wound 23 is created in the bird 10 that runs from the surface of the head 11 to the medulla oblongata of the brain 20. Since the spinal cord 21 is connected to the medulla oblongata (part of the brain 20), a wire (not shown) is inserted through the wound 23 and guided through the brain 20 to the spinal cord 21. Normally, the wire is inserted into the wound 23 after the rigid body has been removed, but if the rigid body is a tube, the wire may be inserted through the tube while the rigid body (tube) remains embedded in the wound 23. The wire has the flexibility to bend along the vertebrae 16 and thoracic vertebrae 17, and the mechanical strength to enter the wound 23, travel through the vertebrae 16 and thoracic vertebrae 17, and destroy the spinal cord 21. The wire is moved back and forth along the vertebrae 16 and thoracic vertebrae 17 to mechanically destroy th