کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5914239 1162726 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural and functional characterization of enamel pigmentation in shrews
ترجمه فارسی عنوان
خصوصیات ساختاری و عملکردی رنگدانه مینای دندان در پیچ ها
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
چکیده انگلیسی

Pigmented tooth enamel occurs in several vertebrate clades, ranging from mammals to fish. Although an iron compound is associated with this orange to red colored pigmentation, its chemical and structural organization within the enamel is unknown. To determine the nature of the iron compound, we investigated heavily pigmented teeth of the northern short-tailed shrew Blarina brevicauda using combined characterization techniques such as scanning and transmission electron microscopy and synchrotron X-ray diffraction. We found that the pigmentation of the enamel with an iron content of around 8 wt% results from a close to amorphous magnetite phase deposited around the nm-sized enamel crystals. Furthermore, the influence of the pigmentation on the enamel hardness was determined by nanoindentation measurements. Finally, the biomechanical function and biological context are discussed in light of the obtained results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Biology - Volume 186, Issue 1, April 2014, Pages 38-48
نویسندگان
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