Magnetic response of Magnetospirillum gryphiswaldense observed inside a microfluidic channel

  title={Magnetic response of Magnetospirillum gryphiswaldense observed inside a microfluidic channel},
  author={Marc P. Pichel and Tijmen Hageman and Islam S. M. Khalil and Andreas Manz and L.Abelmann},
  journal={Journal of Magnetism and Magnetic Materials},

U-turn trajectories of magnetotactic cocci allow the study of the correlation between their magnetic moment, volume and velocity

Magnetotactic bacteria are microorganisms that present intracellular chains of magnetic nanoparticles, the magnetosome chain. A challenge in the study of magnetotactic bacteria is the measurement of

Experimental determination of the propulsion matrix of the body of helical Magnetospirillum magneticum cells.

It is shown that for rotational motions, the overall dimensions of the cell body are what matters most, while the exact body shape influences translational motions.

Multicellularity makes the difference: multicellular magnetotactic prokaryotes have dynamic motion parameters dependent on the magnetic field intensity

Magnetotactic microorganisms can be found as unicellular entities, as coccus, vibrios, spirilla, rods and protists as well as multicellular organisms. The most studied multicellular magnetotactic

Magnetotactic bacteria for cancer therapy

The progress and perspectives of this emerging research field are reviewed and the main challenges to overcome are discussed before the use of MTB can be successfully applied in the clinic.

An open-source automated magnetic optical density meter for analysis of suspensions of magnetic cells and particles.

We present a spectrophotometer (optical density meter) combined with electromagnets dedicated to the analysis of suspensions of magnetotactic bacteria. The instrument can also be applied to

U-turn time and velocity dependence on the wavelength of light: multicellular magnetotactic prokaryotes of different sizes behave differently

It is described for the first time how the photokinesis and U-turn time dependence on the light wavelength disappear and it is proposed that methyl-accepting chemotaxis proteins are involved in that light wavelength dependence for the U- Turn time.

Long-term observation of Magnetospirillum gryphiswaldense in a microfluidic channel

The results suggest that the influence of the high-intensity illumination and the presence of the channel walls are important parameters to consider when performing observations of such long duration.



Switching of Swimming Modes in Magnetospirillium gryphiswaldense.

Influence of the magnetic field on the two-dimensional control of Magnetospirillum gryphiswaldense strain MSR-1

Under the influence of magnetic field reversal with approximately twice the field strength, the diameter of the U-turn trajectories taken by the magnetotactic bacteria is decreased and the adaptive magnetic field decreases the size of region-of-convergence of the controlled bacteria within the vicinity of the reference position.

Magnetite biomineralization in bacteria.

This chapter discusses the current biological and chemical knowledge of magnetite biomineralization in these bacteria, and highlights the extraordinary properties of magnetosomes and some resulting potential applications.

Analysis of Magnetosome Chains in Magnetotactic Bacteria by Magnetic Measurements and Automated Image Analysis of Electron Micrographs

The chain analysis program (CHAP) was used to evaluate the effects of the genetic and growth conditions on magnetosome chain formation, and data obtained were compared and correlated to data obtained from bulk magnetic measurements of wild-type (WT) and mutant cells displaying different chain configurations.

Three-dimensional remote aggregation and steering of magnetotactic bacteria microrobots for drug delivery applications

Three different time-varying magnetic field sequences generated by three orthogonal pairs of electromagnets able to generate 3D aggregations of MTB are presented and compared.

The turning of magnetotactic bacteria

A magnetotactic bacterium aligns itself along the magnetic field. When the field is reversed the bacterium makes a U-turn in the surrounding water. The turning is described by a Fokker-Planck

Development of cellular magnetic dipoles in magnetotactic bacteria.

Magnetosome biogenesis in magnetotactic bacteria

This Review discusses the diverse properties of magnetosome biogenesis in other species of magnetotactic bacteria and considers the value of genetically 'magnetizing' non-magnetotacticacteria.