1,721,134 research outputs found
Vasoactive Intestinal Polypeptide (VIP)-like immunoreactivity in human bulbo-urethral glands.
No full textNi-silica and Cu-silica nanocomposites prepared by ball milling
No full textNickel-silica nanocomposites with different metal volume fractions have been prepared via solid state exchange reactions which were induced by ball milling nickel oxide and silicon powders and by direct milling mixtures of nickel and amorphous silica. A copper-silica nanocomposite has also been prepared by a solid state exchange reaction. The evolution of the systems during the preparation process has been monitored by X-ray diffraction and transmission electron microscopy. Electrical properties of the final samples are examined as a function of composition and preparation method
Immunohistochemical study of secretory IgA in the human male reproductive tract.
No full textMale human genital tract was treated for the immunohistochemical demonstration of secretory IgA in order to verify its own possible antimicrobial properties. An intensely positive immunoreaction for sIgA in the epithelial cells of prostate and urethral glands was observed; in the same organs the presence of immunoreactive cell clusters in the subepithelial layers was noted. Immunostaining in the epithelia of deferent duct, seminal vesicle, deferential ampulla, ejaculatory duct and bulbourethral glands was absent. The findings suggest that a local immune response sIgA-mediated is present in the lower male genital tract
Human urethral epithelium: immunohistochemical demonstration of secretory IgA.
No full textMale human urethral epithelium was treated for the immunohistochemical demonstration of secretory IgA in order to verify its own possible antimicrobial properties. An intense immunoreactivity for sIgA in the entire cytoplasm and at the luminal surface of the apical epithelial cells was observed. The results suggest that sIgA play a prominent role in the local defense mechanisms of the urethra. Such mucosal defense mechanisms may be of significance in the defense of the urinary and genital tract against ascending infections
A histochemical study of the main excretory duct of the human submandibular gland.
No full textThe duct was reacted histochemically to identify glycoproteins and several enzymic activities. Neutral mucosubstances were detected in the entire cytoplasm of the principal cells, and acid glycoproteins were identified only in a thin apical zone corresponding to the glycocalyx. Lysosomal enzymes were demonstrated as cytoplasmic granules, whereas endogenous peroxidase was diffusely distributed throughout the entire cytoplasm of the epithelial cells. 17 beta- and 3 beta-hydroxysteroid dehydrogenases and prostaglandin-synthetase reactivity were intense in all epithelial cells
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