منابع مشابه
Scales of fish arise from mesoderm
The trunk of fish is covered by a large variety of morphologically and structurally diverse skeletal elements, such as scales, scutes and bony plates [1]. These elements are formed from intramembraneous ossifications and are part of the integumentary skeleton [2]. Histological and developmental similarities with neural crest-derived teeth in fossil and extant vertebrates, have led to the widely...
متن کاملFish and Fishing in Holocene Cis-Baikal, Siberia: A Review
Eastern Siberia’s Lake Baikal and its tributaries are productive fisheries, and the region’s Holocene archaeological sites confirm that this is a long-standing phenomenon. Recent zooarchaeological investigations of sites here allow Holocene fishing practices to be examined in more detail than was previously possible. Along much of the lake’s coast, bathymetry is very steep and the water very co...
متن کاملFish-Scales: Representing Fuzzy Manifolds
We address the problem of automatically reconstructing m-manifolds of unknown topology from unorganized points in metric p-spaces obtained from a noisy measurement process. The point set is first approximated by a collection of oriented primitive fuzzy sets over a range of resolutions. Hierarchical multiresolution representation is then computed based on the relation of relative containment def...
متن کاملUnder-water superoleophobicity of fish scales
Recent surge in the development of superhydrophobic/superoleophobic surfaces has been motivated by surfaces like fish scales that have hierarchical structures, which are believed to promote water or oil repellency. In this work, we show that the under-water oil repellency of fish scales is entirely due to the mucus layer formation as part of its defense mechanism, which produces unprecedented c...
متن کاملAlgae (Dasycladales) from the Upper Triassic Nayband Formation (northeast Iran)
Dasycladales are relatively abundant in the bedded limestones of the Bidestan and Howz-e Khan members of the Late Triassic Nayband Formation in central Iran. In a locality south of the town of Naybandan (northwest of Dig-e Rostam), several Rhaetian dasycladacean algae were found in thin sections. The following taxa are described: Diplopora phanerospora Pia, Naybandoporella rhaetica nov. gen. no...
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ژورنال
عنوان ژورنال: Annals and Magazine of Natural History
سال: 1889
ISSN: 0374-5481
DOI: 10.1080/00222938909460481