منابع مشابه
Biominerals Are Also Found in Teeth and Bones
Whether bones, teeth, or mother-of-pearl – evolution has always found ways to invent suitable materials for every task. This is also evidenced by otoconia: tiny crystals found in the inner ear, whose structure, formation and function are being investigated by Rüdiger Kniep, Director at the Max Planck Institute for Chemical Physics of Solids in Dresden. Kniep’s research may also help in finding ...
متن کاملMolecular phylogenetics of mastodon and Tyrannosaurus rex.
We report a molecular phylogeny for a nonavian dinosaur, extending our knowledge of trait evolution within nonavian dinosaurs into the macromolecular level of biological organization. Fragments of collagen alpha1(I) and alpha2(I) proteins extracted from fossil bones of Tyrannosaurus rex and Mammut americanum (mastodon) were analyzed with a variety of phylogenetic methods. Despite missing sequen...
متن کاملFunctional Morphology of the Shoulder Girdle and the Fore- Limbs in Sauropod Dinosaurs under Consideration of 3-d Finite- Element Structure Synthesis (fess)
and would the Society want it. It was transferred to Bismarck in 1948 and fell into obscurity until 1991. The unmineralized bones of the Highgate Mastodon were in remarkably good condition when restoration began in 1991, perhaps because the bones had been “sized” with white glue when collected. The skeleton is 80 to 85% complete. A tusk, left femur, left ulna, tooth, and several foot bones were...
متن کاملDiatoms from the Sheiton Mastodon Site
A fairly diverse and abundant diatom flora is associated with remains of Mammut americanurn at the Shelton Mastodon Site in northern Oakland County, Michigan. The most abundant elements of this flora are species commonly recorded from late-glacial deposits in North America and Europe. The nearest modern analogues of this flora are assemblages deposited in small lakes in the high arctic and pres...
متن کاملa comparison of linguistic and pragmatic knowledge: a case of iranian learners of english
در این تحقیق دانش زبانشناسی و کاربردشناسی زبان آموزان ایرانی در سطح بالای متوسط مقایسه شد. 50 دانش آموز با سابقه آموزشی مشابه از شش آموزشگاه زبان مختلف در دو آزمون دانش زبانشناسی و آزمون دانش گفتار شناسی زبان انگلیسی شرکت کردند که سوالات هر دو تست توسط محقق تهیه شده بود. همچنین در این تحقیق کارایی کتابهای آموزشی زبان در فراهم آوردن درون داد کافی برای زبان آموزان ایرانی به عنوان هدف جانبی تحقیق ...
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ژورنال
عنوان ژورنال: Science
سال: 1902
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.16.406.594