Results 211 to 220 of about 121,897 (259)

Fine structure of the secretory and non‐secretory ameloblasts in the frog. II. Fine structure of the non‐secretory ameloblast

Journal of Morphology, 1977
AbstractThe non‐secretory ameloblasts present at the enamel‐free surfaces of maxillary teeth in the frog Rana pipiens were examined by electron microscopy at different stages of tooth development. Their main fine structural features seem to reflect a transport function.
A E, Zaki, E K, MacRae
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Fine structure of the human secretory ameloblast

European Journal of Oral Sciences, 1978
abstract— The fine structure of secretory ameloblasts in primary tooth germs from a human fetus was investigated. Various aldehyde fixatives produced varying qualities of preservation. The morphology of the best preserved ameloblasts differed from that earlier described, mainly in the following respects: the rough endoplasmic cisternae were lamellated ...
M E, Matthiessen, P, Römert
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Biosynthesis and structure of membrane and secretory immunoglobulins

Molecular and Cellular Biochemistry, 1982
Almost all of the body's extracellular immunoglobulin (Ig) is derived from Ig-secreting plasma cells of lymphoid tissues. The secreted material is a heterogeneous mixture of different classes and specificities. Lymphoid tissues also contain a large number of essentially non-secretory cells--B lymphocytes--which bear Ig firmly associated with their ...
H P, Kocher, R K, Bijlenga, J C, Jaton
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The structure of bovine secretory component

Veterinary Immunology and Immunopathology, 1987
Bovine secretory component (SC) has been cleaved with trypsin into a series of fragments and their N-terminal amino acid sequences have been determined. The close homology with the known sequence of human SC has enabled the sequential order of the fragments to be deduced. The results indicate that bovine SC consists of a single glycosylated polypeptide
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Micelle Structure of Amelogenin in Porcine Secretory Enamel

Journal of Dental Research, 2007
Even during the secretory stage of amelogenesis, enamel crystals thicken as amelogenins (the major protein component) decrease. To explain this phenomenon, we propose a model for amelogenin structure and function based upon the hypothesis that amelogenin forms micelles.
M, Fukae, R, Yamamoto, T, Karakida, S, Shimoda, T, Tanabe   +4 more
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Fine structure of secretory ameloblasts in the kitten

American Journal of Anatomy, 1977
AbstractSecretory ameloblasts in lower second molars of 1‐week‐old kittens were studied with the elctron microscope after perfusion‐fixation with and without decalcification.Ameloblast height varied from 40–65 μm. Tomes' process presented a stepped profile with two type‐1 faces (presumably enamel secreting) and one type‐2 face (thought to be non ...
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Structure and development of the secretory cells of the hen's ovary

Zeitschrift f�r Anatomie und Entwicklungsgeschichte, 1972
The granulosa and the luteal cells have been studied in the ovary of the adult laying hen by histochemistry, autoradiography, polarized light and electron microscopy. It is concluded that the granulosa cells are specialized for the synthesis of proteins, whereas the luteal cells mainly secrete steroids.
E T, Peel, R, Bellairs
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SECRETORY STRUCTURES IN ARTEMISIA NITIDA BERTOL. (ASTERACEAE)

Israel Journal of Plant Sciences, 1995
Artemisia nitida Bertol. has not been studied so far from a pharmaco-biological point of view. In the present work some results of morphological and histochemical studies on the secretory structures are given. The secretory structures are of two types: glandular trichomes, and secretory ducts whose secretion is quite similar but not identical.
CORSI, GABRIELLA, NENCIONI S.
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Studies on the Primary Structure of Human Secretory Component

1974
Secretory component occurs in external secretions in two forms, bound and free. The former is an integral part of the secretory IgA molecule, the attachment being covalent in the human. Free secretory component, on the other hand, is present in secretions unattached to other protein.
C, Cunningham-Rundles, M E, Lamm, E C, Franklin   +2 more
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Structural composition of canine secretory component and immunoglobulin A

Biochemistry, 1975
Dog serum and colostral immunoglobulin A (IgA) and free secretory component from colostrum were isolated using affinity chromatography. Both serum and colostral IgA showed similar susceptibility to reduction with dithiothreitol, but only colostral IgA released the additional subunit, bound secretory component.
R E, Thompson, H Y, Reynolds, M J, Waxdal   +2 more
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