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词汇 keratin
释义

Definition of keratin in English:

keratin

noun ˈkɛrətɪnˈkɛrədən
mass noun
  • A fibrous protein forming the main structural constituent of hair, feathers, hoofs, claws, horns, etc.

    角蛋白

    Example sentencesExamples
    • Amino acids are absorbed by the body to help build keratin, the main protein in hair.
    • Mammalian hair, made of a protein called keratin, serves at least four functions.
    • Hair is composed of non-living tissue, mostly of a fibrous protein known as keratin and is devoid of nerves.
    • Animal hair fibers consist of a protein known as keratin.
    • Gecko spatulae are made of keratin, the protein in human hair.
    • The mature nail is a plate of the protein keratin which is also present in hair and skin.
    • Your fingernails are composed of layers of keratin, a protein also found in hair and skin.
    • They are unable to grow in living tissues but instead can multiply in structures containing keratin.
    • Fungal infections usually affect the skin because they live off keratin, a protein that makes up skin, hair and nails.
    • Cat claws are made of keratin, a protein also found in human nails.
    • Actin and keratin both share with byssal threads a tendency to recover initial modulus and stress upon relaxation.
    • Their skin is covered with non-overlapping scales composed of the protein keratin and often studded with bony plates called scutes.
    • The slightly flattened spikes were covered with keratin, the same protein found in horns, fingernails, and claws.
    • Androgens are also responsible for the increased growth in body hair and an increased shedding of keratin, a protein that can block pores and the flow of sebum.
    • The structures had probably been covered with keratin, the same protein found in fingernails, horns, and claws.
    • Cells are laced with a network of fibres more rigid than the rope-like structural proteins collagen and keratin.
    • Each hair is made of tough and stretchable protein called keratin, manufactured by the hair follicle.
    • Dermatophytes are fungi that can cause infections of the skin, hair and nails because of their ability to feed on keratin.
    • Chemical constituents include keratin and eukeratin as well as other proteins, peptides and free amino acids.
    • Baleen is made of keratin, the same protein that makes up hair and fingernails, and is strong, yet elastic.

Origin

Mid 19th century: from Greek keras, kerat- 'horn' + -in1.

  • rhinoceros from Late Middle English:

    It is the look of the rhinoceros that provides its name, which comes from Greek rhino- ‘nose’ and keras ‘horn’. The animal has been known in English since the end of the 14th century, but the first reference to it calls it a kind of unicorn. Rhino- will be familiar to gardeners from the antirrhinum (mid 16th century), the alternative name for the snapdragon, whose name means ‘counterfeiting a nose’ from its appearance, while keras appears in keratin (mid 19th century), the substance from which horn is made.

Definition of keratin in US English:

keratin

nounˈkɛrədənˈkerədən
  • A fibrous protein forming the main structural constituent of hair, feathers, hoofs, claws, horns, etc.

    角蛋白

    Example sentencesExamples
    • Androgens are also responsible for the increased growth in body hair and an increased shedding of keratin, a protein that can block pores and the flow of sebum.
    • Cells are laced with a network of fibres more rigid than the rope-like structural proteins collagen and keratin.
    • Baleen is made of keratin, the same protein that makes up hair and fingernails, and is strong, yet elastic.
    • Animal hair fibers consist of a protein known as keratin.
    • Hair is composed of non-living tissue, mostly of a fibrous protein known as keratin and is devoid of nerves.
    • They are unable to grow in living tissues but instead can multiply in structures containing keratin.
    • The mature nail is a plate of the protein keratin which is also present in hair and skin.
    • Actin and keratin both share with byssal threads a tendency to recover initial modulus and stress upon relaxation.
    • Their skin is covered with non-overlapping scales composed of the protein keratin and often studded with bony plates called scutes.
    • Chemical constituents include keratin and eukeratin as well as other proteins, peptides and free amino acids.
    • Amino acids are absorbed by the body to help build keratin, the main protein in hair.
    • The structures had probably been covered with keratin, the same protein found in fingernails, horns, and claws.
    • Cat claws are made of keratin, a protein also found in human nails.
    • Mammalian hair, made of a protein called keratin, serves at least four functions.
    • Each hair is made of tough and stretchable protein called keratin, manufactured by the hair follicle.
    • Fungal infections usually affect the skin because they live off keratin, a protein that makes up skin, hair and nails.
    • Dermatophytes are fungi that can cause infections of the skin, hair and nails because of their ability to feed on keratin.
    • The slightly flattened spikes were covered with keratin, the same protein found in horns, fingernails, and claws.
    • Your fingernails are composed of layers of keratin, a protein also found in hair and skin.
    • Gecko spatulae are made of keratin, the protein in human hair.

Origin

Mid 19th century: from Greek keras, kerat- ‘horn’ + -in.

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