scholarly journals Photo-Controlled Waves and Active Locomotion

2017 ◽  
Vol 23 (47) ◽  
pp. 11181-11188 ◽  
Author(s):  
Irving R. Epstein ◽  
Qingyu Gao
Keyword(s):  
Active Locomotion

scholarly journals A New Active Locomotion Capsule Endoscopy under Magnetic Control and Automated Reading Program

2020 ◽  
Vol 53 (4) ◽  
pp. 395-401
Author(s):  
Dong Jun Oh ◽  
Kwang Seop Kim ◽  
Yun Jeong Lim
Keyword(s):  
Capsule Endoscopy ◽  
Reading Program ◽  
Magnetic Control ◽  
Active Locomotion

scholarly journals A wake-active locomotion circuit depolarizes a sleep-active neuron to switch on sleep

PLoS Biology ◽  
2020 ◽  
Vol 18 (2) ◽  
pp. e3000361 ◽  
Author(s):  
Elisabeth Maluck ◽  
Inka Busack ◽  
Judith Besseling ◽  
Florentin Masurat ◽  
Michal Turek ◽  
...  
Keyword(s):  
Active Neuron ◽  
Active Locomotion

Superelastic leg design optimization for an endoscopic capsule with active locomotion

2008 ◽  
Vol 18 (1) ◽  
pp. 015001 ◽  
Author(s):  
Elisa Buselli ◽  
Pietro Valdastri ◽  
Marco Quirini ◽  
Arianna Menciassi ◽  
Paolo Dario
Keyword(s):  
Design Optimization ◽  
Endoscopic Capsule ◽  
Leg Design ◽  
Active Locomotion

scholarly journals Quantification of the locomotive behavior of polymorphonuclear leukocytes in clot preparations

Blood ◽  
1982 ◽  
Vol 59 (5) ◽  
pp. 946-951 ◽  
Author(s):  
TH Howard
Keyword(s):  
Polymorphonuclear Leukocytes ◽  
Normal Subjects ◽  
Time Lapse ◽  
Turning Behavior ◽  
Multiple Parameters ◽  
Human Pmns ◽  
Direction Distance ◽  
Active Locomotion ◽  
Locomotive Behavior

Abstract Time-lapse videotape recordings of polymorphonuclear leukocytes (PMNs) from clot preparations were used to quantify the locomotive behavior of individual PMNs from normal subjects. Tracings derived from the videotapes allow one to quantify multiple parameters of the locomotive behavior of PMNs--direction, distance, rate, and angle of turn. The results obtained are reproducible from subject-to-subject and from preparation-to-preparation. The method allows the investigator to record the locomotive behavior of 100 cells simultaneously within a 5- min period and analyze the recording as time permits. We utilized this technique to compare the locomotive behavior of slow and fast PMNs (arbitrarily defined as cells that move less than or equal to 7.0 micrometer/min and greater than 7.0 micrometer/min mean rate of locomotion, respectively). The studies show that slow and fast PMNs, thus defined, differ not only in mean rate of locomotion but also in their rate of locomotion during periods of active locomotion, in the number of periods of inactivity/PMN/5 min (slow = 1.65 +/- 0.31; fast = 0.36 +/- 0.12), and in their turning behavior as measured by angle of turn (slow = 92 degrees +/- 39 degrees; fast = 39 degrees +/- 35 degrees). These results show that human PMNs from clot preparations are remarkably heterogeneous in their locomotive behavior, and the results suggest this heterogeneity is due to endogenous differences within cells.

scholarly journals Quantification of the locomotive behavior of polymorphonuclear leukocytes in clot preparations

Blood ◽  
1982 ◽  
Vol 59 (5) ◽  
pp. 946-951
Author(s):  
TH Howard
Keyword(s):  
Polymorphonuclear Leukocytes ◽  
Normal Subjects ◽  
Time Lapse ◽  
Turning Behavior ◽  
Multiple Parameters ◽  
Human Pmns ◽  
Direction Distance ◽  
Active Locomotion ◽  
Locomotive Behavior

Time-lapse videotape recordings of polymorphonuclear leukocytes (PMNs) from clot preparations were used to quantify the locomotive behavior of individual PMNs from normal subjects. Tracings derived from the videotapes allow one to quantify multiple parameters of the locomotive behavior of PMNs--direction, distance, rate, and angle of turn. The results obtained are reproducible from subject-to-subject and from preparation-to-preparation. The method allows the investigator to record the locomotive behavior of 100 cells simultaneously within a 5- min period and analyze the recording as time permits. We utilized this technique to compare the locomotive behavior of slow and fast PMNs (arbitrarily defined as cells that move less than or equal to 7.0 micrometer/min and greater than 7.0 micrometer/min mean rate of locomotion, respectively). The studies show that slow and fast PMNs, thus defined, differ not only in mean rate of locomotion but also in their rate of locomotion during periods of active locomotion, in the number of periods of inactivity/PMN/5 min (slow = 1.65 +/- 0.31; fast = 0.36 +/- 0.12), and in their turning behavior as measured by angle of turn (slow = 92 degrees +/- 39 degrees; fast = 39 degrees +/- 35 degrees). These results show that human PMNs from clot preparations are remarkably heterogeneous in their locomotive behavior, and the results suggest this heterogeneity is due to endogenous differences within cells.

Amphibian pronephric duct morphogenesis: segregation, cell rearrangement and directed migration of the Ambystoma duct rudiment

Development ◽  
1981 ◽  
Vol 63 (1) ◽  
pp. 1-16
Author(s):  
T. J. Poole ◽  
M. S. Steinberg
Keyword(s):  
Cell Number ◽  
Intercellular Contact ◽  
Dorsal Part ◽  
Directed Migration ◽  
Sem Observation ◽  
Pronephric Duct ◽  
Cell Rearrangement ◽  
Surgical Manipulation ◽  
Lateral Mesoderm ◽  
Active Locomotion

The axolotl pronephric duct rudiment is readily accessible to both SEM observation and surgical manipulation. The rudiment segregates from the dorsal part of the lateral mesoderm and then extends caudally along the ventrolateral border of the segmenting somites, eventually contacting the cloacal wall. The marked thinning of the rudiment which accompanies this migration is paralleled by a corresponding reduction in cell number across the duct's diameter and by caudad translocation and elongation of vital dye marks applied to the duct mesoderm. Duct extension thus involves appreciable cell rearrangement. The morphology of duct mesoderm and its substratum (somite and lateral mesoderm) suggests that active locomotion of cells near its tip marshals the duct's caudad elongation. Filopodia and small focal areas of intercellular contact may mediate the adhesions between duct cells which must be broken and reformed as the cells rearrange.

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