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NSF Grantees Meeting 12/4/07
NSF Grantees Meeting 12/4/07

Sea-Floor Spreading
Sea-Floor Spreading

... valley of the Ridge – they looked like pillows! These rocks hardened quickly after erupting, and only underwater and concluded that material must be erupting continually underwater at this location! ...
164 analysis of reference magnetic fields homogeneity generated by
164 analysis of reference magnetic fields homogeneity generated by

Force on the plasma / Virial theorem
Force on the plasma / Virial theorem

... Ignition is defined as the state in which the energy produced by the fusion reactions is sufficient to heat the plasma. Only the He atoms are confined (neutrons escape the magnetic field) and therefore only 20% of the total fusion power is available for plasma heating ...
doc Pathogenesis
doc Pathogenesis

... rearrangements of the cell surface and cause the cell to engulf bacteria. 3. Many intestinal pathogenic bacteria attack and dismantle cell-cell junctions in the intestinal epithelium and gain access between cells. ii. Can be passive penetration. 1. Not related to pathogen itself (skin lesion, bite) ...
Soil Microbiology
Soil Microbiology

... The nitrogen fixing bacteria are found inlumps on the roots called root nodules. The bacteria and the plant have a symbiotic relationship: the bacteria benefits by having food and shelter from the plant and the plant benefits by having nitrates produced by the bacteria. ...
Viruses in Soil
Viruses in Soil

What is a magnet?
What is a magnet?

...  All atoms have electrons, so you might think that all materials should be magnetic, but there is great variability in the magnetic properties of materials.  The electrons in some atoms align to cancel out one another’s magnetic influence.  While all materials show some kind of magnetic effect, t ...
Citric Acid Cycle
Citric Acid Cycle

... The bacteria's cleaning power comes from their ability to "inhale" toxic metals and "exhale" them in a non-toxic form, explains team member Brian Lower, assistant professor in the School of Environment and Natural Resources at Ohio State University. Using a unique combination of microscopes, researc ...
pathogenesis of bacterial infection pathogenicity toxigenicity
pathogenesis of bacterial infection pathogenicity toxigenicity

Exploration: Moving Particles in Magnetic Fields
Exploration: Moving Particles in Magnetic Fields

pathogenesis of bacterial infection pathogenicity toxigenicity
pathogenesis of bacterial infection pathogenicity toxigenicity

... When such a pure culture is inoculated into susceptible animal species, the typical disease must result. The microorganism must again be isolated from the lesions of such experimentally produced disease. ...
The Hall Effect - The Ohio State University
The Hall Effect - The Ohio State University

ENGINEERING PHYSICS II SEMICONDUCTING MATERIALS
ENGINEERING PHYSICS II SEMICONDUCTING MATERIALS

...  A semiconductor slab of thickness ‘t’ and breadth ‘b’ is taken and current is passed using the battery as shown in figure. ...
Lecture 11
Lecture 11

... Magnetic fields can be represented by field lines with the following rule: (a) the direction of the tangent to a magnetic field line at any point gives the direction of B at that point (b) the spacing of the lines represents the magnitude of B, it means the magnetic field is stronger where the lines ...
Magnetism (Chap. 24) - Alejandro L. Garcia
Magnetism (Chap. 24) - Alejandro L. Garcia

... but oscillations are created by variations in electrical current, which cause an electromagnet to be pulled towards and away from a second, permanent magnet. ...
Current in a Magnetic Field * Learning Outcomes
Current in a Magnetic Field * Learning Outcomes

... 1. Set up a strip of tin foil between the north and south poles of a magnet (or two magnets). 2. Note no deflection on the foil. 3. Pass a current through the foil. 4. The foil will move towards one of the poles, depending on which way the current flows. 5. The foil must be experiencing a force due ...
Bacteria of Medical Importance
Bacteria of Medical Importance

ELECTRICITY AND MAGNETISM The magnetic field created by an
ELECTRICITY AND MAGNETISM The magnetic field created by an

... • circuits can be carved into the surface • circuits are good conductors • very energy-efficient ...
Chapter 22: Magnetism
Chapter 22: Magnetism

Understanding magnetic field spatial gradients
Understanding magnetic field spatial gradients

... The attractive force exerted on an object near a magnet is proportional to the spatial gradient of the field. For unsaturated materials (paramagnetic or diamagnetic) the attractive force is also proportional to the local magnetic field strength ( ∆B x B). This is sometimes referred to as the “Force ...
Magnetic field Conductor
Magnetic field Conductor

... Mechanical force exerted on the conductor always acts in a direction perpendicular to the plane of the conductor and the magnetic field thumb (Mechanical force) ...
Heat Capacity Studies of NdNi4Si Compound
Heat Capacity Studies of NdNi4Si Compound

Early Life on Planet Earth - University of Evansville Faculty Web sites
Early Life on Planet Earth - University of Evansville Faculty Web sites

Performance of anti-biofouling coatings under variable and dynamic
Performance of anti-biofouling coatings under variable and dynamic

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Magnetotactic bacteria

Magnetotactic bacteria (or MTB) are a polyphyletic group of bacteria discovered by Richard P. Blakemore in 1975, that orient along the magnetic field lines of Earth's magnetic field. To perform this task, these bacteria have organelles called magnetosomes that contain magnetic crystals. The biological phenomenon of microorganisms tending to move in response to the environment's magnetic characteristics is known as magnetotaxis (although this term is misleading in that every other application of the term taxis involves a stimulus-response mechanism). In contrast to the magnetoception of animals, the bacteria contain fixed magnets that force the bacteria into alignment — even dead cells align, just like a compass needle. The alignment is believed to aid these organisms in reaching regions of optimal oxygen concentration.
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