Results 31 to 40 of about 205,581 (146)

From rock‐boring organisms to tunnel boring machines: A new rock breaking technology by bioinspiration

Biosurface and Biotribology, Volume 7, Issue 4, Page 233-238, December 2021., 2021
Abstract The purpose of this study is to achieve better understanding of associated mechanisms and to recommend and identify new strategies to develop new rock breaking technology for Tunnel Boring Machines (TBMs). Tunnel Boring Machine tunnelling mainly depends upon the rock breakage caused by cutters moving on a rock surface in a rolling and sliding ...
Jing Zheng, Zhixin Wu, Jiahui Nie, Lei Lei, Zhongrong Zhou, Jianbin Li   +5 more
wiley   +1 more source

Timing and pace of ice‐sheet withdrawal across the marine–terrestrial transition west of Ireland during the last glaciation

Journal of Quaternary Science, Volume 36, Issue 5, Page 805-832, July 2021., 2021
ABSTRACT Understanding the pace and drivers of marine‐based ice‐sheet retreat relies upon the integration of numerical ice‐sheet models with observations from contemporary polar ice sheets and well‐constrained palaeo‐glaciological reconstructions. This paper provides a reconstruction of the retreat of the last British–Irish Ice Sheet (BIIS) from the ...
Colm Ó Cofaigh, S. Louise Callard, David H. Roberts, Richard C. Chiverrell, C. K. Ballantyne, David J. A. Evans, Margot Saher, Katrien J. J. Van Landeghem, Rachel Smedley, Sara Benetti, Matthew Burke, Chris D. Clark, Geoff A. T. Duller, Derek Fabel, Stephen J. Livingstone, Stephen Mccarron, Alicia Medialdea, Steven G. Moreton, Fabio Sacchetti   +18 more
wiley   +1 more source

Dextral and sinistral Amphidromus inversus (Gastropoda: Pulmonata: Camaenidae) produce dextral sperm. [PDF]

Zoomorphology, 2011
Coiling direction in pulmonate gastropods is determined by a single gene via a maternal effect, which causes cytoskeletal dynamics in the early embryo of dextral gastropods to be the mirror image of the same in sinistral ones.
Schilthuizen M, van Heuven BJ.
europepmc   +3 more sources

Conservation of ParaHox genes' function in patterning of the digestive tract of the marine gastropod Gibbula varia. [PDF]

BMC Dev Biol, 2010
Background Presence of all three ParaHox genes has been described in deuterostomes and lophotrochozoans, but to date one of these three genes, Xlox has not been reported from any ecdysozoan taxa and both Xlox and Gsx are absent in nematodes.
Samadi L, Steiner G.
europepmc   +4 more sources

Pattern, style and timing of British–Irish Ice Sheet advance and retreat over the last 45 000 years: evidence from NW Scotland and the adjacent continental shelf

Journal of Quaternary Science, Volume 36, Issue 5, Page 871-933, July 2021., 2021
Abstract Predicting the future response of ice sheets to climate warming and rising global sea level is important but difficult. This is especially so when fast‐flowing glaciers or ice streams, buffered by ice shelves, are grounded on beds below sea level. What happens when these ice shelves are removed?
Tom Bradwell, Derek Fabel, Chris D. Clark, Richard C. Chiverrell, David Small, Rachel K. Smedley, Margot H. Saher, Steven G. Moreton, Dayton Dove, S. Louise Callard, Geoff A. T. Duller, Alicia Medialdea, Mark D. Bateman, Matthew J. Burke, Neil McDonald, Sean Gilgannon, Sally Morgan, David H. Roberts, Colm ó Cofaigh   +18 more
wiley   +1 more source

Developmental role of dpp in the gastropod shell plate and co-option of the dpp signaling pathway in the evolution of the operculum [PDF]

, 2012
The operculum is a novel structure in gastropod molluscs. Because the operculum shows notable similarities to the shell plate, we asked whether there were an evolutionary link between these two secretory organs.
Hashimoto Naoki, Kurita Yoshihisa, Wada Hiroshi, 和田 洋   +3 more
core   +1 more source

Inducible Defenses with a "Twist": Daphnia barbata Abandons Bilateral Symmetry in Response to an Ancient Predator. [PDF]

PLoS One, 2016
Predation is one of the most important drivers of natural selection. In consequence a huge variety of anti-predator defenses have evolved in prey species.
Herzog Q, Rabus M, Wolfschoon Ribeiro B, Laforsch C.   +3 more
europepmc   +5 more sources

Revisiting the molluscan fauna from the Cambrian (Series 2, stages 3–4) Xinji Formation of North China

Papers in Palaeontology, Volume 7, Issue 1, Page 521-564, February 2021., 2021
Abstract A diverse group of molluscs from the Cambrian Series 2, Stages 3–4 Xinji Formation of the North China Block (NCB) is described, based on more than 4500 specimens from three well‐studied sections in Shaanxi and Henan provinces, along the southern and southwestern margin of the NCB. Twenty molluscan species are identified, including one bivalve,
Luoyang Li, Xingliang Zhang, Christian B. Skovsted, Hao Yun, Bing Pan, Guoxiang Li, Andrew Smith   +6 more
wiley   +1 more source

Association between shell morphology of micro-land snails (genus Plectostoma) and their predator’s predatory behaviour [PDF]

, 2014
Predator–prey interactions are among the main ecological interactions that shape the diversity of biological form. In many cases, the evolution of the mollusc shell form is presumably driven by predation.
Alcock, Alexander, Allmon, Allmon, Archangelsky, Bieler, Brusca, Clements, Clench, DeWitt, DeWitt, Ghosh, Gittenberger, Goodfriend, Harary, Heude, Hoso, Hoso, Hoso, Kelley, Konumu, Kowalewski, Kurozumi, Liew, Liew, Madruga Rios, Moreno-Rueda, Okamoto, Olson, Quensen, Relyea, Savazzi, Schilthuizen, Schilthuizen, Schilthuizen, Seuss, Sih, Tan, Thornton, van Benthem-Jutting, Vermeij, Vermeij, Vermeij, Vermeij, Vermeij, Vermeulen, Wada, Wang, Wu   +48 more
core   +1 more source

At the limits of a successful body plan - 3D microanatomy, histology and evolution of Helminthope (Mollusca: Heterobranchia: Rhodopemorpha), the most worm-like gastropod. [PDF]

Front Zool, 2013
Background: Gastropods are among the most diverse animal clades, and have successfully colonized special habitats such as the marine sand interstitial. Specialized meiofaunal snails and slugs are tiny and worm-shaped.
Brenzinger B, Haszprunar G, Schrödl M.
europepmc   +3 more sources