共查询到12条相似文献,搜索用时 0 毫秒
1.
Summary The spermiophagic process by intraluminal macrophages in the epididymal ducts of the vasectomized Japanese monkey was well visualized with scanning electron microscope. The fragments of disintegrated spermatozoa were seen in the phase enveloped in bulk by flap-like cytoplasmic extensions or in the phase ingested within the cytoplasm. 相似文献
2.
Kuen-Shan Hung A. L. Chapman S. H. Hung C. D. Menon 《Cellular and molecular life sciences : CMLS》1982,38(8):959-961
Summary In normal young rats, groups of Clara cells in the bronchioles showed the formation of many cytoplasmic blebs on their cytoplasmic domes. Detached blebs rested on the bronchiolar epithelial cells. The scanning (SEM) and transmision electron microscope (TEM) studies suggest localized changes of Clare cell surface activities by increased formation of cytoplasmic blebs which may represent the apocrine type of secretion.This project was supported by research grants from NIH HD-10139 and the American Heart Association, Kansas Affiliate. We used the Electron Microscope Research Service Laboratory of the University of Kansas Medical Center. 相似文献
3.
M. Murakami T. Nishida S. Iwanaga M. Shiromoto 《Cellular and molecular life sciences : CMLS》1984,40(9):958-960
Summary Scanning and transmission electron microscopic observations have been made in the terminal region of the vas deferens of the cat, with emphasis on the occurrence of spermiophagy. The present study has revealed that epithelial cells as well as luminal macrophages are extensively and actively involved in phagocytosis of spermatozoa. The mechanism of the spermiophagy is discussed, in relation to a possible role of the epithelial cells, as one function of the vas deferens. 相似文献
4.
Scanning and transmission electron microscopic observations have been made in the terminal region of the vas deferens of the cat, with emphasis on the occurrence of spermiophagy. The present study has revealed that epithelial cells as well as luminal macrophages are extensively and actively involved in phagocytosis of spermatozoa. The mechanism of the spermiophagy is discussed, in relation to a possible role of the epithelial cells, as one function of the vas deferens. 相似文献
5.
U Heinzmann 《Experientia》1980,36(7):885-887
FITC-dextrans can be detected at the ultrastructural level as round electron dense particles, with no sign of distortion or aggregation. Because this tracer is a stable, non-toxic polymer of biological origin obtainable in a wide range of molecular weights, it may be useful for further studies of tissue permeability. 相似文献
6.
U. Heinzmann 《Cellular and molecular life sciences : CMLS》1980,36(7):885-887
Summary FITC-dextrans can be detected at the ultrastructural level as round electron dense particles, with no sign of distortion or aggregation. Because this tracer is a stable, non-toxic polymer of biological origin obtainable in a wide range of molecular weights, it may be useful for further studies of tissue permeability.The author is grateful to Ms. H. Büscher and Ms. S. Klemt, Department of Pathology, for their excellent technical assistance. 相似文献
7.
Zusammenfassung Es wird über die Verwendung des Lektins vonLens culinaris zum immunologisch-spezifischen licht- und elektronenmikroskopischen Nachweis vond-Mannose- undd-Glukose-artigen Orten der Zelloberfläche berichtet. 相似文献
8.
Position of the nucleolus within the nuclei of pachytene spermatocytes of Dromiciops australis and Marmosa elegans (Didelphoidea-Marsupialia). 总被引:2,自引:0,他引:2
The location of the nucleoli within the nuclei of pachytene spermatocytes, and their relation with the position of the nucleolar organizer region (NOR) was studied. It appears that a terminal NOR determines a peripheral location of the nucleolus, due to the position of the NOR over the synaptonemal complex and to the attachment of the nucleolar chromosome telomeres at the nuclear membrane. 相似文献
9.
J. N. Maina 《Cellular and molecular life sciences : CMLS》1982,38(5):614-616
Summary Air and blood capillaries of the lung of the domestic fowl constitute the functional gas exchange units. They anastomose profusely
and interlace with each other in 3 dimensions. Air capillaries are not blind-ending tubules as has occasionally been suggested.
I am most grateful to: Mr K. Veltkamp for aid with SEM, Dr M.A. Abdalla for help with injections, Prof. A.S. King for critical
suggestions, Mr J. Geary for aid with photography. 相似文献
10.
Testosterone causes a significant body temperature decrease in male quails. Oxygen consumption/g b. wt remains the same, however. 相似文献
11.
H Boulekbache C Devillers 《Comptes rendus des séances de l'Académie des sciences. Série D, Sciences naturelles》1977,285(8):917-920
Our study relates to the development of the membrane relief of the blastomeres of the trout egg from the stage before their division up to gastrulation. The surface of the blastoderm shows first a more or less dense system of crests which by the time of gastrulation are replaced by microvilli distributed over the whole surface of the enveloping layer. The deep blastomeres, loosely connected to each other by lamellipodes and filopodes produce only a few projections of their membranes and these are only semispherical bodies. Possible roles of the microvillosities in the respiratory exchange of the egg and in the motility of the enveloping layer, are considered. 相似文献
12.
The early differentiation of the connective tissue was investigated in the perinotochordal zone of 2-3 day-old chick embryos. After characterizing the different tissue components by transmission electron microscopy, their arrangement and distribution were examined by SEM. The results are discussed with regard to the role of the extracellular material in embryonic tissue interactions. 相似文献