scholarly journals Ultrastructural Characterization of Stem Cell‐Derived Replacement Vestibular Hair Cells Within Ototoxin‐Damaged Rat Utricle Explants

2019 ◽  
Vol 303 (3) ◽  
pp. 506-515 ◽  
Author(s):  
Mimmi Werner ◽  
Thomas R. Van De Water ◽  
Hans Stenlund ◽  
Diana Berggren
Keyword(s):  
Stem Cell ◽  
Hair Cells ◽  
Vestibular Hair Cells ◽  
Ultrastructural Characterization

Neural connections between embryonic stem cell-derived neurons and vestibular hair cells in vitro

2005 ◽  
Vol 1057 (1-2) ◽  
pp. 127-133 ◽  
Author(s):  
Tae-Soo Kim ◽  
Takayuki Nakagawa ◽  
Tomoko Kita ◽  
Toru Higashi ◽  
Shinji Takebayashi ◽  
...  
Keyword(s):  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Hair Cells ◽  
Embryonic Stem ◽  
Neural Connections ◽  
Vestibular Hair Cells

Ultrastructural Characterization of Mouse Embryonic Stem Cell-Derived Oocytes and Granulosa Cells

2011 ◽  
Vol 20 (12) ◽  
pp. 2205-2215 ◽  
Author(s):  
Olympia E. Psathaki ◽  
Karin Hübner ◽  
Davood Sabour ◽  
Vittorio Sebastiano ◽  
Guangming Wu ◽  
...  
Keyword(s):  
Stem Cell ◽  
Embryonic Stem Cell ◽  
Granulosa Cells ◽  
Embryonic Stem ◽  
Mouse Embryonic Stem Cell ◽  
Ultrastructural Characterization

scholarly journals Functional development of mechanosensitive hair cells in stem cell-derived organoids parallels native vestibular hair cells

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Xiao-Ping Liu ◽  
Karl R. Koehler ◽  
Andrew M. Mikosz ◽  
Eri Hashino ◽  
Jeffrey R. Holt
Keyword(s):  
Stem Cell ◽  
Hair Cells ◽  
Vestibular Hair Cells ◽  
Functional Development

Ultrastructural characterization of an inner envelope that confines Azolla endosymbionts to the leaf cavity periphery

1989 ◽  
Vol 67 (9) ◽  
pp. 2711-2719 ◽  
Author(s):  
S. A. Nierzwicki-Bauer ◽  
H. Aulfinger ◽  
E. B. Braun-Howland
Keyword(s):  
Hair Cells ◽  
Peripheral Region ◽  
Central Cavity ◽  
Transmission Electron ◽  
Ultrastructural Characterization ◽  
Young Leaves ◽  
Ultrastructural Characteristics ◽  
Membrane Ultrastructure ◽  
Inner Envelope

Ultrastructural characteristics of Azolla leaf cavities were examined using transmission electron microscopy. An extracellular inner envelope, which forms a boundary between the central cavity region and the peripheral region containing cyanobacteria and (or) bacteria, was found in all closed leaf cavities of symbiotic and Anabaena-free Azolla species. In the youngest leaf, which is in the process of developing a cavity, a continuous inner envelope was never observed. However, in young leaves that contained closed cavities, and in older leaves, continuous inner envelopes were always observed. The inner envelope may serve to restrict the symbionts to the cavity periphery. The inner envelope was similar in appearance to the outer envelope, which encloses the symbionts and hair cells within leaf cavities. Examination of the inner envelope using three different fixation procedures revealed that it was most distinct in fronds fixed in potassium permanganate, suggesting that it is membranelike in structure. The envelope was occasionally seen folded back upon itself or curled, which is also characteristic of a membranelike structure. Nevertheless, the envelope did not exhibit typical tripartite membrane ultrastructure. The occurrence of the inner envelope in Anabaena-free Azolla indicates that this envelope is of eubacterial or plant origin.

Ultrastructural identification of three types of sensory setae on copepod antennae

1995 ◽  
Vol 53 ◽  
pp. 956-957
Author(s):  
T. M. Weatherby ◽  
P.H. Lenz
Keyword(s):  
Phase Locking ◽  
Membrane Surface ◽  
Reaction Times ◽  
High Sensitivity ◽  
Structural Features ◽  
Calanoid Copepods ◽  
Marine Food Webs ◽  
Dendritic Membrane ◽  
Ultrastructural Characterization

Crustaceans, as well as other arthropods, are covered with sensory setae and hairs, including mechanoand chemosensory sensillae with a ciliary origin. Calanoid copepods are small planktonic crustaceans forming a major link in marine food webs. In conjunction with behavioral and physiological studies of the antennae of calanoids, we undertook the ultrastructural characterization of sensory setae on the antennae of Pleuromamma xiphias.Distal mechanoreceptive setae exhibit exceptional behavioral and physiological performance characteristics: high sensitivity (<10 nm displacements), fast reaction times (<1 msec latency) and phase locking to high frequencies (1-2 kHz). Unusual structural features of the mechanoreceptors are likely to be related to their physiological sensitivity. These features include a large number (up to 3000) of microtubules in each sensory cell dendrite, arising from or anchored to electron dense rods associated with the ciliary basal body microtubule doublets. The microtubules are arranged in a regular array, with bridges between and within rows. These bundles of microtubules extend far into each mechanoreceptive seta and terminate in a staggered fashion along the dendritic membrane, contacting a large membrane surface area and providing a large potential site of mechanotransduction.

Ultrastructural Characterization of Malpighian Tubules of Rhodnius prolixus During the Insect's Feeding Cycle and Under Hyperosmotic Shock

2020 ◽  
Vol 129 (2) ◽  
pp. 189
Author(s):  
Jacenir Reis dos Santos-Mallet ◽  
Simone Patrícia Carneiro Freitas ◽  
Maria Luiza Ribeiro de Oliveira ◽  
Alice Helena Ricardo-Silva ◽  
Aníbal Gil Lopes ◽  
...  
Keyword(s):  
Rhodnius Prolixus ◽  
Malpighian Tubules ◽  
Hyperosmotic Shock ◽  
Ultrastructural Characterization ◽  
Feeding Cycle
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