Results 41 to 50 of about 215,212 (170)

Left-right asymmetric expression of dpp in the mantle of gastropods correlates with asymmetric shell coiling [PDF]

open access: yes, 2018
This is the final version of the article. Available from BMC via the DOI in this record.BACKGROUND: Various shapes of gastropod shells have evolved ever since the Cambrian.
Asami, T   +7 more
core   +5 more sources

A Conceptual Model and Evaluating Experiments for Studying the Effect of Soil Deformation on Its Permeability

open access: yesShock and Vibration, Volume 2021, Issue 1, 2021., 2021
Soil structure and void ratio are the major factors that control the permeability changes during soil deformation. In this research, we proposed and tested a conceptual model considering these two factors based on the concept of permeability anisotropy.
Masoud Enayat   +3 more
wiley   +1 more source

Tuning gastropod locomotion: Modeling the influence of mucus rheology on the cost of crawling [PDF]

open access: yesPhys. Fluids (2006) 18, 113102, 2006
Common gastropods such as snails crawl on a solid substrate by propagating muscular waves of shear stress on a viscoelastic mucus. Producing the mucus accounts for the largest component in the gastropod's energy budget, more than twenty times the amount of mechanical work used in crawling.
arxiv   +1 more source

Gangliogenesis in the Prosobranch Gastropod Ilyanassa obsoleta [PDF]

open access: yes, 1996
We determined that the larval nervous system of Ilyanassa obsoleta contains paired cerebral, pleural, pedal, buccal, and intestinal ganglia and unpaired apical, osphradial, and visceral ganglia.
Leise, Esther M.   +1 more
core   +1 more source

On a group whose generalized torsion elements are torsion elements [PDF]

open access: yesarXiv, 2023
We show that a group whose generalized torsion elements are torsion elements (which we call a $TR^{*}$-group) is torsion-by-$R^{*}$ group, an extension of torsion group by a group without generalized torsion elements. We also discuss a generalized torsion group, a group all of whose non-trivial elements are generalized torsion elements.
arxiv  

Expressed sequence tag analysis of genes expressed during development of the tropical abalone Haliotis asinina [PDF]

open access: yes, 2006
The tropical abalone. Haliotis asinina. is,in ideal species to investigate the molecular mechanisms that control development. growth, reproduction and shell formation in all cultured haliotids. Here we describe the analysis of 232 expressed sequence tags
Bricelj, V. Monica   +6 more
core   +6 more sources

Modern insights on gastropod development: Reevaluation of the evolution of a novel body plan.

open access: yesIntegrative and Comparative Biology, 2006
More than a century of speculation about the evolutionary origin of the contorted gastropod body plan has been inspired by adult anatomy and by long-standing developmental observations.
L. Page
semanticscholar   +1 more source

UEG Week 2023 Poster Presentations

open access: yes, 2023
United European Gastroenterology Journal, Volume 11, Issue S8, Page 535-1498, October 2023.
wiley   +1 more source

Fluid-driven traveling waves in soft robots [PDF]

open access: yesarXiv, 2021
Many marine creatures, gastropods, and earthworms generate continuous traveling waves in their bodies for locomotion within marine environments, complex surfaces, and inside narrow gaps. In this work, we study theoretically and experimentally the use of embedded pneumatic networks as a mechanism to mimic nature and generate bi-directional traveling ...
arxiv  

Neuromuscular development of Aeolidiella stephanieae Valdéz, 2005 (Mollusca, Gastropoda, Nudibranchia) [PDF]

open access: yes, 2010
Background: Studies on the development of the nervous system and the musculature of invertebrates have become more sophisticated and numerous within the last decade and have proven to provide new insights into the evolutionary history of organisms.
Klussmann-Kolb, Annette, Kristof, Alen
core   +3 more sources

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