Annular

I hope somebody can help me out here. I understand that secondary walls are laid in xylem tissue in one of the following ways: annular thickenings, helical thickenings, scariform thickenings, reticulate thickenings. My questions are as follows: 1. Are these only present on primary xylem ...

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... over the entire 26.885 micron2 microbivore outer hull, excluding the two 1-micron2 port doors. (One or more grapple-containing bridges across the annular exhaust port aperture (Section 3.1.4) may be necessary if it is desired to transport targets <200 nm in diameter from the circular DC exhaust ...

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... of 4 weeks (range: 1-24) before the onset of arthritis, 13 patients (25%) noted an erythematous papule that developed into an expanding, red, annular lesion, as much as 50 cm in diameter. Only 2 of 159 family members of patients had such a lesion and did not develop arthritis (P less than ...

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