نتایج جستجو برای: Flagellar Wave

تعداد نتایج: 223614  

2003
D. Fry N. Hutchings A. Ludu

Although the auger-like 'swimming' motility of the African trypanosome was described upon its discovery over one hundred years ago, the precise biomechan-ical and biophysical properties of trypanosome flagellar motion has not been elucidated. In this study, we describe five different modes of flagellar beat/wave patterns in African trypanosomes by microscopically examining the flagellar movemen...

2008
D. Fry N. Hutchings A. Ludu

Although the auger-like 'swimming' motility of the African trypanosome was described upon its discovery over one hundred years ago, the precise biomechan-ical and biophysical properties of trypanosome flagellar motion has not been elucidated. In this study, we describe five different modes of flagellar beat/wave patterns in African trypanosomes by microscopically examining the flagellar movemen...

2016
Aakash Gautam Mukhopadhyay Chinmoy Sankar Dey

The flagellum of parasitic trypanosomes is a multifunctional appendage essential for its viability and infectivity. However, the biological mechanisms that make the flagellum so dynamic remains unexplored. No method is available to access and induce axonemal motility at will to decipher motility regulation in trypanosomes. For the first time we report the development of a detergent-extracted/de...

Journal: :modares journal of medical sciences: pathobiology 2010
mohsen arzanloo morteza sattari ahmad zavaran hosseini sobhan faezi

objective: pseudomonas aeruginosa is the major cause of septicemia and wound infection in burned patients. immunotraphy is the best practical way for prevention and treatment of these infections. flagella as one of the most important bacterial virulence factors has important role in attachment, motility, chemotaxis and tlr-5-dependent immune response so that it propounded as a vaccine candidate...

Background: To clarify the mechanism of sperm penetration through the zona pellucida, the flagellar force generated by a hyperactivated spermatozoon was evaluated using the resistive force theory applied to the hyperactivated flagellar waves that were obtained from the mammalian spermatozoa. Materials and Methods: The hydrodynamic calculation of the flagellar force of the activated (non-hyperac...

Journal: :Biophysical journal 2002
D M Woolley G G Vernon

When mouse spermatozoa swim in media of high viscosity, additional waves of bending are superimposed on the primary traveling wave. The additional (secondary) waves are relatively small in scale and high in frequency. They originate in the proximal part of the interbend regions. The initiation of secondary bending happens only in distal parts of the flagellum. The secondary waves propagate alon...

2015
Reza Nosrati Amine Driouchi Christopher M. Yip David Sinton

Sperm motion near surfaces plays a crucial role in fertilization, but the nature of this motion has not been resolved. Using total internal reflection fluorescence microscopy, we selectively imaged motile human and bull sperm located within one micron of a surface, revealing a distinct two-dimensional (2D) 'slither' swimming mode whereby the full cell length (50-80 μm) is confined within 1 μm o...

Journal: :The Journal of Cell Biology 1974
Barbara H. Gibbons I. R. Gibbons

Sea urchin sperm were demembranated and reactivated with a solution containing 0.04% Triton X-100 and 0.03 mM ATP. The ATP concentration was then lowered abruptly by diluting the sperm suspension 50-fold into reactivating solution containing no ATP. The flagella of the sperm in the diluted suspension were not motile, but they were bent into a variety of stationary rigor wave forms closely resem...

Journal: :The Journal of experimental biology 1990
D Eshel C Shingyoji K Yoshimura B H Gibbons I R Gibbons K Takahashi

Within the approximate range of 30-80 Hz, the flagellar beat frequency of a sea urchin sperm held by its head in the tip of a micropipet is governed by the vibration frequency of the micropipet. We have imposed abrupt changes in flagellar beat frequency by changing the vibration frequency of the micropipet within this range and used a high-speed video system to analyze the flagellar wave parame...

Journal: :Journal of bacteriology 1965
M Mitani T Iino

Mitani, Michiko (National Institute of Genetics, Mishima, Japan), and Tetsuo Iino. Electron microscopy of bundled flagella of the curly mutant of Salmonella abortivoequina. J. Bacteriol. 90:1096-1101. 1965.-The arrangement of flagella was observed by dark-field and electron microscopy in three strains of Salmonella abortivoequina, namely, normal flagellar, curly flagellar, and paralyzed curly f...

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