| 单词 | melanin |
| 释义 | melanin noun[U] uk/ˈmel.ə.nɪn/us/ˈmel.ə.nɪn/adarkbrownpigment(=substancethat givescolour),foundineyes,skin,hair,feathers, etc. Ithelpstoprotecttheskinagainstharmfullightfrom thesun. 黑色素Biochemistry
Examplesofmelaninmelanin A crystal of phenylthiourea was added to samples to be used for electrophoresis to inhibitmelaninformation. From theCambridge English Corpus The precise structure of naturalmelaninis not known, because of its poor solubility and its association with proteins and lipids. From theCambridge English Corpus This suggests that dark-adapted thresholds are directly related to rhodopsin levels regardless of the level of ocularmelanin. From theCambridge English Corpus Themelanincontent did not increase with fish length. From theCambridge English Corpus Very occasionally,melaninpigmentation of the skin may occur. From theCambridge English Corpus This lack of generality stands contrary to the proposed role ofmelaninpigment in retinal development and thus militates against this mechanism. From theCambridge English Corpus The liver macrophages of chub which never aggregate contain haemosiderin but are devoid ofmelanin. From theCambridge English Corpus The conjunctiva, sclera and iris are heavily pigmented withmelaningranules and the iris contains gold-reflecting material, which is mostly obscured by the pigmented layer. From theCambridge English Corpus The snail tissue is also nearly transparent, except for the digestive gland and mantle tissue which is spotted withmelanin. From theCambridge English Corpus The monotonic absorption profile with no specific features can be explained by the complexity of themelaninstructure. From theCambridge English Corpus Our findings have implications for understanding the role ofmelaninor related agents in the process of mammalian retinal development. From theCambridge English Corpus It leaks more slowly and, due to the stimulating wavelength, provides greater visualization of structures hidden by blood, exudate, lipid ormelanin. From theCambridge English Corpus It is suggested that the delayed production in hardness may be associated with the presence of a reducing chemical environment produced by antioxidant properties of melanins. From theCambridge English Corpus Doesmelanindo more than protect from light? From theCambridge English Corpus Melanincontaining cells of teleost fish and their relation to disease. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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