Results 41 to 50 of about 27,378 (258)

Determination of the presence of 5-methylcytosine in Paramecium tetraurelia. [PDF]

open access: yesPLoS ONE, 2018
5-methylcytosine DNA methylation regulates gene expression and developmental programming in a broad range of eukaryotes. However, its presence and potential roles in ciliates, complex single-celled eukaryotes with germline-somatic genome specialization ...
Aditi Singh   +5 more
doaj   +1 more source

Buckling of a beam extruded into highly viscous fluid

open access: yes, 2014
Inspired by microscopic paramecies which use trichocyst extrusion to propel themselves away from thermal aggressions, we propose a macroscopic experiment to study the stability of a slender beam extruded in a highly viscous fluid.
Gosselin, Frederick . P.   +2 more
core   +1 more source

A porous prolate-spheroidal model for ciliated micro-organisms [PDF]

open access: yes, 1977
A fluid-mechanical model is developed for representing the mechanism of propulsion of a finite ciliated micro-organism having a prolate-spheroidal shape.
Keller, Stuart R., Wu, Theodore Y.
core   +1 more source

Pemanfaatan Ekstrak Kulit Ubi Jalar Ungu (Ipomea batatas L.) sebagai Bahan Pewarna Alternatif untuk Pengamatan Mikroskopis Paramecium sp. dalam Pembelajaran Biologi

open access: yesAl-Hayat, 2019
Purple sweet potato (Ipomea batatas L.) is a tuber that has purple meat and skin. The purple color of purple sweet potato is usually used by the community as a food coloring, while the sweet potato skin is considered only waste and disposed of.
Dewi Fatimatuzahro   +2 more
doaj   +1 more source

Waveguide Photoactuators: Materials, Fabrication, and Applications

open access: yesAdvanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi   +4 more
wiley   +1 more source

Mimicking Life: Autonomous Oscillating Artificial Cilia Driven by Chemical Power

open access: yesAdvanced Intelligent Systems, EarlyView.
The synthesis and motion analysis of chemically actuated, individually autonomous artificial cilia are presented. Driven by an internal chemical reaction, the self‐driven individual cilia require no external stimuli. They undergo periodic oscillatory motion with a 3D beat pattern and exhibit chemotactic shifts, reminiscent of biological systems.
Rajata Suvra Chakrovorty   +2 more
wiley   +1 more source

Phosphoproteins associated with cyclic nucleotide stimulation of ciliary motility in Paramecium [PDF]

open access: yes, 1990
Permeabilized, MgATP-reactivated cells of Paramecium (models) respond to cyclic AMP and cyclic GMP by increasing forward swimming speed. In association with the motile response, cyclic AMP and 8-bromo-cyclic GMP (8-Br-cyclic GMP) stimulated protein ...
Bonini, Nancy M., Nelson, David L.
core  

Continual decision‐making dynamics across biological organisms

open access: yesBiological Reviews, EarlyView.
ABSTRACT Decision‐making is a central function of adaptive behaviour in biological agents. However, strategies for adaptive decision‐making can vary substantially across species. Here, we aim to extend the comparative scope of decision‐making analyses to phylogenetically diverse organisms.
Liberty Severs, Qiuran Wang
wiley   +1 more source

Ecosystem size reverses the effect of the spatial coupling between autotrophic and heterotrophic ecosystems

open access: yesOikos, EarlyView.
The flow of non‐living resources between autotrophic and heterotrophic ecosystems can impact their ecosystem function. However, ecosystem size is similarly known to influence ecological properties and it is uncertain how the size of coupled ecosystems mediates the effect of resource flows.
Emanuele Giacomuzzo   +3 more
wiley   +1 more source

From Biosemiotics to Semiotics [PDF]

open access: yes, 2002
Biosemiotics and Semiotics have similarities and differences. Both deal with signal and meaning. One difference is that Biosemiotics covers a domain (life) that is less complex that the one addressed by Semiotics (human).
Menant, Christophe
core   +1 more source

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