Mixing of solutions by coordinated ciliary motion in Vorticella convallaria and patterning method for microfluidic applications

2013 ◽  
Vol 188 ◽  
pp. 1255-1262 ◽  
Author(s):  
Moeto Nagai ◽  
Yo Hayasaka ◽  
Kei Kato ◽  
Takahiro Kawashima ◽  
Takayuki Shibata
Keyword(s):  
Ciliary Motion

Comment on Dr. Gilmour's views on feeding by hemichordates and lophophorates

1982 ◽  
Vol 60 (12) ◽  
pp. 3466-3468 ◽  
Author(s):  
Richard R. Strathmann
Keyword(s):  
Particle Capture ◽  
Ciliary Motion

Observations on motion of captured particles, films of ciliary motion during particle capture, and physical theories of the motion of particles and water contradict substantial parts of Dr. Gilmour's accounts of ciliary feeding by hemichordates and lophophorates. (T. H. J. Gilmour. 1982. Feeding in tornaria larvae and the development of gill slits in enteropneust hemichordates. Can. J. Zool. 60. This issue.)

scholarly journals Swimming like algae: biomimetic soft artificial cilia

2013 ◽  
Vol 10 (78) ◽  
pp. 20120666 ◽  
Author(s):  
Sina Sareh ◽  
Jonathan Rossiter ◽  
Andrew Conn ◽  
Knut Drescher ◽  
Raymond E. Goldstein
Keyword(s):  
Smart Materials ◽  
Fluid Transport ◽  
Metal Composite ◽  
Ionic Polymer ◽  
Piecewise Constant ◽  
Ciliary Motion ◽  
Thrust Generation ◽  
Artificial Cilia ◽  
Segmentation Pattern ◽  
Polymer Metal

Cilia are used effectively in a wide variety of biological systems from fluid transport to thrust generation. Here, we present the design and implementation of artificial cilia, based on a biomimetic planar actuator using soft-smart materials. This actuator is modelled on the cilia movement of the alga Volvox , and represents the cilium as a piecewise constant-curvature robotic actuator that enables the subsequent direct translation of natural articulation into a multi-segment ionic polymer metal composite actuator. It is demonstrated how the combination of optimal segmentation pattern and biologically derived per-segment driving signals reproduce natural ciliary motion. The amenability of the artificial cilia to scaling is also demonstrated through the comparison of the Reynolds number achieved with that of natural cilia.

scholarly journals I. On the embryogeny of comatula rosacea (Linck)

1859 ◽  
Vol 9 ◽  
pp. 600-601
Keyword(s):  
Granular Matter ◽  
Reproductive Organs ◽  
Areolar Tissue ◽  
Young Larva ◽  
Characteristic Form ◽  
Male And Female ◽  
Pale Yellow ◽  
Ciliary Motion ◽  
Female Reproductive Organs

The author briefly described the male and female reproductive organs of Comatula. When the ova are mature, and before impregnation, they are protruded and remain hanging from the ovarian orifice, entangled in the areolar tissue of the everted ovary. In this position impregnation appears usually to take place. After segmentation of the yelk, a solid nucleus is formed in the centre of the mulberry yelk-mass. This nucleus becomes invested in a special membrane, and into this embryonic mass the remainder of the yelk is gradually absorbed. Ciliary motion is observed at various points on the surface of the inclosed embryo, which finally assumes its characteristic form. The young larva, on escaping from the egg, consists of a homogeneous mass of pale-yellow granular matter, with scattered nuclei, cells, and oil-globules. It is barrel-shaped, and girded at intervals with about five broad ciliated bands.

scholarly journals The dynein-triggered ciliary motion in embryonic nodes: An exploratory study based on computational models

2014 ◽  
Vol 24 (6) ◽  
pp. 2495-2501
Author(s):  
Duanduan Chen ◽  
Yi Zhong ◽  
Kyosuke Shinohara ◽  
Tomoki Nishida ◽  
Toshiaki Hasegawa ◽  
...  
Keyword(s):  
Exploratory Study ◽  
Computational Models ◽  
Ciliary Motion

scholarly journals Polarity of dynein-microtubule interactions in vitro: cross-bridging between parallel and antiparallel microtubules.

1981 ◽  
Vol 89 (1) ◽  
pp. 35-44 ◽  
Author(s):  
F D Warner ◽  
D R Mitchell
Keyword(s):  
Original Population ◽  
Microtubule Polarity ◽  
Ciliary Motion ◽  
Dynein Arms ◽  
Cross Bridges

Ciliary doublet microtubules produced by sliding disintegration in 20 muM MgATP2-reassociate in the presence of exogenous 30S dynein and 6 mM MgSO4. The doublets form overlapping arrays, held together by dynein cross-bridges. Dynein arms on both A and B subfibers serve as unambiguous markers of microtubule polarity within the arrays. Doublets reassociate via dynein cross-bridges in both parallel and antiparallel modes, although parallel interactions are favored 2:1. When 20 muM ATP is added to the arrays, the doublets undergo both vanadate-sensitive and insensitive forms of secondary disintegration to reproduce the original population of doublets. The results demonstrate that both parallel and antiparallel doublet cross-bridging is sensitive to dissociation by ATP even though normal ciliary motion depends strictly on dynein interactions between parallel microtubules.

scholarly journals Seeing cilia: imaging modalities for ciliary motion and clinical connections

2018 ◽  
Vol 314 (6) ◽  
pp. L909-L921 ◽  
Author(s):  
Jacelyn E. Peabody ◽  
Ren-Jay Shei ◽  
Brent M. Bermingham ◽  
Scott E. Phillips ◽  
Brett Turner ◽  
...  
Keyword(s):  
High Speed ◽  
Imaging Modalities ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Disease States ◽  
Transmission Electron ◽  
Ciliary Motion ◽  
Health And Disease ◽  
Motion Imaging ◽  
Ciliary Dyskinesia

The respiratory tract is lined with multiciliated epithelial cells that function to move mucus and trapped particles via the mucociliary transport apparatus. Genetic and acquired ciliopathies result in diminished mucociliary clearance, contributing to disease pathogenesis. Recent innovations in imaging technology have advanced our understanding of ciliary motion in health and disease states. Application of imaging modalities including transmission electron microscopy, high-speed video microscopy, and micron-optical coherence tomography could improve diagnostics and be applied for precision medicine. In this review, we provide an overview of ciliary motion, imaging modalities, and ciliopathic diseases of the respiratory system including primary ciliary dyskinesia, cystic fibrosis, chronic obstructive pulmonary disease, and idiopathic pulmonary fibrosis.

scholarly journals Ciliary motion modeling, and dynamic multicilia interactions

1992 ◽  
Vol 63 (4) ◽  
pp. 1045-1058 ◽  
Author(s):  
Shay Gueron ◽  
Nadav Liron
Keyword(s):  
Motion Modeling ◽  
Ciliary Motion
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