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In this case, the toroidal surface has become an off-axis segment of an ellipsoid.
Surrounding the pulsar is a bright doughnut-shaped, or toroidal , structure, with jet-like features extending in a perpendicular direction away from the torus.
Other curvature geometries such as elliptical, logarithmic parabolic, and log spiral can be used to accommodate different source or image geometries, though we'll restrict this discussion to the symmetrical toroidal geometry.
Briefly, four replicate 25 m diameter toroidal plenum rings constructed from 0.305 m diameter pipe were placed in the field shortly after planting.
If we assume that POPC has a cross-sectional area of 65 [Angstrom] 2, the surface area of a toroidal pore equals that of 105 lipids.
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