A single-layer, wideband and angularly stable metasurface based polarization converter for linear-to-linear cross-polarization conversion.

In this article, a single-layer metasurface based reflector design is proposed for linear-to-linear cross-polarization conversion in microwave frequency range. The unit-cell of the proposed design consists of triple-arrow resonant design printed on a grounded FR4 substrate. Excellent cross-conversion is achieved over a broad frequency range (8.

VCAM-1 and eosinophilia in diffuse sino-nasal polyps.

The objective of our study was to investigate: the expression of vascular cell adhesion molecule-1 (VCAM-1) in diffuse sino-nasal polyps; the relation between VCAM-1 and selective eosinophilia in diffuse sino-nasal polyps; the effect of eosinophilia and VCAM-1 expression on recurrence of diffuse sino-nasal polyps following treatment. Fifty patients with diffuse sino-nasal polyps were included in the study. Biopsies were taken from the polyps and the inferior turbinate mucosa of each patient and were studied by immunohistochemical staining for detection of VCAM-1 expression on the blood vessels, as well as by hematoxylin and eosin (H&E) staining for detection of eosinophils.