Results 121 to 130 of about 150,301 (303)
Dental crown morphological variation and heterodonty in carcharhiniform sharks
The Anatomical Record, EarlyView.Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley +1 more source
Influence of the Manufacturing Parameter Error on Tooth Surface Error of curvic coupling
Jixie chuandong, 2017 To investigate the influence of manufacturing parameter adjustment errors of machine tool on the tooth surface geometrical precision of curvic coupling,the general tooth surface deviation equation which contained multiple processing parameter adjustment ...
Wu Hongyan +3 more
doaj
The Anatomical Record, EarlyView.Abstract Belonostomus longirostrisis was named for an isolated jaw fragment from freshwater Upper Cretaceous (Campanian) sediments of the Dinosaur Park Formation of Alberta, Canada. Following the description of the Albertan species, numerous isolated cranial and postcranial elements have been collected from the Dinosaur Park Formation and assigned to B.
Mondo Miyazato +4 more
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Applied SciencesThe operating conditions of the drum shearer are very complex, and its ranging arm gear system often suffers from gear scuffing and wear. Gear scuffing is caused by the adhesive wear, which is due to the instantaneous friction and flash temperature of ...
Bo Bai, Run Mao, Wenchao Guo, Shimin Mao
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An osteohistological analysis of Triceratops (Ornithischia: Ceratopsidae) cranial ornamentation
The Anatomical Record, EarlyView.Abstract Ceratopsids are among the most distinctive and well known extinct Cretaceous vertebrates, yet many details regarding the growth and composition of their cranial features are still not fully anatomically described or understood. In particular, striking cranial adornments such as the postorbital horns and parietal‐squamosal frill of Triceratops ...
Kyle D. Obuszewski +2 more
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Effect of Hand and Ultrasonic Scaling-Root Planing Methods on Tooth Surface Topography: An In-Vitro Atomic Force Microscopy Study. [PDF]
Cureus, 2023 Kumari N +5 more
europepmc +1 more source
The Anatomical Record, EarlyView.Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro +1 more
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A three-dimension mathematical modeling method for HFT hypoid gear
工程科学与技术, 2016 :The tooth surface coordinates are difficult to be got about HFT hypoid gear. For the problem, a mathematical modeling method of tooth surface based on MATLAB is presented in this paper, by which the tooth surface coordinates can be calculated ...
liucheng
doaj
Determination of the Wormwheel Tooth Surface
Procedia Engineering, 2017 Abstract The surface of wormwheel toothing is determined as the envelope of the action surface of the tool, which a special wormwheel hob or a modular hob. The tool and the machined wormwheel form a worm–wormwheel technological gear in the machining process.
openaire +1 more source