单词 | cementum |
例句 | Another way to estimate age is to use a microscope to count the yearly additions of a mineralized tissue called cementum on teeth. Old age isn’t a modern phenomenon – many people lived long enough to grow old in the olden days, too 2022-08-11T04:00:00Z In the root of each tooth, the dentin is covered by an even harder bone-like layer called cementum. Anatomy and Physiology 2013-06-19T00:00:00Z As a result Cerrito and colleagues looked at a different tissue, cementum, that grows throughout an individual’s life. Teeth reveal past stresses such as menopause and imprisonment 2020-03-25T04:00:00Z As an animal ages, a substance called cementum is deposited on the root of the tooth, thickening the walls from the outside in. Tooth-aging program aids wildlife management 2018-01-31T05:00:00Z Sloth teeth lack enamel and are composed instead of two different kinds of dentine plus an outer layer of cementum, the softer dentine forming the innermost region of the tooth. The anatomy of sloths 2012-08-30T19:15:03.553Z Aging white-tailed deer by annuli in the cementum of the first incisor. Ecological Studies of the Timber Wolf in Northeastern Minnesota 2011-10-03T02:00:28.037Z Most genetics research on ancient teeth has focused on the inner tooth tissue, dentine, but Adler's team found that cementum, the coating of the root, was a richer source of DNA. Researchers to drill for ancient DNA in 'hobbit' tooth 2011-01-05T23:15:00.950Z Looking at the teeth using polarised light microscopy, the team found the interaction of the cementum with light was not the same throughout the tissue. Teeth reveal past stresses such as menopause and imprisonment 2020-03-25T04:00:00Z During the winter, when food supplies are scarce and the animal is under stress, the layers of cementum are dark. Tooth-aging program aids wildlife management 2018-01-31T05:00:00Z “This tells us something about the ‘sensitivity’ of cementum as a recording structure: episodic events are not recorded, while prolonged systemic ones are.” Teeth reveal past stresses such as menopause and imprisonment 2020-03-25T04:00:00Z In the summer, when food is plentiful and stress is minimal, growth happens more quickly and a lighter layer of cementum forms. Tooth-aging program aids wildlife management 2018-01-31T05:00:00Z They will target cementum in their next attempt. Researchers to drill for ancient DNA in 'hobbit' tooth 2011-01-05T23:15:00.950Z |
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