Results 221 to 230 of about 121,897 (259)
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Trees, 1990
The differentiation of the secretory cavities of Ginkgo stem and the structural organization of the epithelial cells were followed by light and electron microscopy. The mode of formation of the cavities is schizo-lysigeneous. Functional complexes of leucoplasts and associated endoplasmic reticulum (ER) membranes are assumed to be the site of synthesis ...
Alain Cartayrade +3 more
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The differentiation of the secretory cavities of Ginkgo stem and the structural organization of the epithelial cells were followed by light and electron microscopy. The mode of formation of the cavities is schizo-lysigeneous. Functional complexes of leucoplasts and associated endoplasmic reticulum (ER) membranes are assumed to be the site of synthesis ...
Alain Cartayrade +3 more
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The fine structure of secretory ameloblasts in rat incisors
The Anatomical Record, 1968AbstractThe fine structure of the ameloblasts which secrete the inner enamel matrix in rat incisors was described using light and electron microscopy. The tissue was fixed by perfusion with 2.5% glutaraldehyde and gently decalcified in isotonic EDTA.The ameloblasts are tall cells forming a simple columnar epithelium. The base is adjacent to the stratum
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Plant epidermis‐derived secretory structures: from glandular trichomes to secretory cavities
New PhytologistSummary Trichomes develop as outward projections from the epidermal surface. By contrast, as subepidermal secretory cavities, citrus oil glands originate from epidermal cells and develop into specialized hollow structures. During the development of these epidermis‐derived structures in vascular plants, transcription factors, such as ...
Shu Xiang +3 more
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Photoreceptoral and secretory structures in the avian pineal organ
Journal of Ultrastructure Research, 1969Electron microscopic studies on the pineal organ of the adult Japanese quail and the White Leghorn chicken showed three cell types present within the cell cluster: ependymal, secretory, and photoreceptor cells. Ependymal cells had apical cilia with the 9 + 2 arrangement of the microtubules; secretory cells had numerous membrane-limited secretory ...
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Extracellular Structural and Secretory Proteins
1994The extracellular matrices of animal tissues consist of networks of collagens and elastins, the meshes of which are filled with structural glycoproteins and glycosaminoglycans. The cells themselves are in direct contact with the basement membranes, which are specific regions of the extracellular matrix with a thickness of 20200 nm.
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Observations on the structure of secretory cells associated with aphid cornicles
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1972Light- and electron-microscopic observations on the cornicles of the rose aphid Macrosiphum rosae are presented, and discussed in relation to conflicting interpretations of cornicle structure and function. Lipid filled cornicle secretory cells occupy the lumen of the cornicle and extend into the abdominal cavity.
S W, Chen, J S, Edwards
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Cell Contents, Secretory Structures
1988When mentioning occurrence of crystals in woods of dicotyledons, wood anatomists usually specify degree of abundance, crystal shapes and sizes, and organo-graphic distribution. By “organographic distribution,” one means whether crystals are present in rays, axial parenchyma, or imperforate tracheary elements, whether they are in all cells or only part ...
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Distribution of internal secretory structures in Tagetes patda (Asteraceae)
Nordic Journal of Botany, 1995Poli, E, Sacchetti, G. & Bruni, A. 1995. Distribution of internal secretory structures in Tagetes parula (Asteraceae). ‐ Nord. J. Bot. 15: 197–205. Copenhagen. ISSN 0107–055X.
Poli F., Sacchetti G., Bruni A.
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Determination of the Molecular Structure of the Human Free Secretory Component
Biological Chemistry Hoppe-Seyler, 1991Here, we present the experimental data, leading to determination of the primary structure, the linkage of the carbohydrates and the arrangements of the disulfide bonds of the human free secretory component. Methods of protein chemistry were used. The protein can be divided into five homology regions and is a member of the immunoglobulin superfamily.
H, Eiffert +6 more
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Thoracic neurosecretory structures in brachyura. II. Secretory neurons
General and Comparative Endocrinology, 1961Abstract The major neurohemal complex in the crab thorax, the pericardial organ-anterior ramifications (PO-AR), receives fibers from three kinds of secretory neurons: B-cells and C-cells located in the central thoracic nerve mass, and PO or AR cells located in the PO-AR complex. There are about 25 segmentally arranged B-cells on each side.
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