Scanning electron microscopy最新文献_第2页

Permanent noise-induced damage to stereocilia: a scanning electron microscopic study of the lizard's cochlea. 对直立纤毛的永久性噪音损伤:蜥蜴耳蜗的扫描电子显微镜研究。

Scanning electron microscopy Pub Date : 1986-01-01

M J Mulroy

引用次数: 0

Basal lamina at the epithelial-connective tissue junction in the rat forestomach, esophagus, tongue and palate: scanning electron microscopic study. 大鼠前胃、食道、舌、腭上皮-结缔组织连接处基底膜的扫描电镜研究。

Scanning electron microscopy Pub Date : 1986-01-01

M T Hull, K A Warfel

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The operculum-plug area and membranous structure of the eggs of Trichuris trichiura. 毛滴虫卵的盖塞区和膜状结构。

Scanning electron microscopy Pub Date : 1986-01-01

X Q Meng, S S Wang, W Q Zhou, B X Wang, W S Han, L Wang

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Corrosion cast technique applied in lymphatic pathways. 腐蚀铸造技术在淋巴管中的应用。

Scanning electron microscopy Pub Date : 1986-01-01

A Castenholz

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Anatomy and morphometry of myocardial capillaries studied with vascular corrosion casting and scanning electron microscopy: a method for rat heart. 用血管腐蚀铸造和扫描电镜研究大鼠心肌毛细血管的解剖形态学。

Scanning electron microscopy Pub Date : 1986-01-01

F E Hossler, J E Douglas, L E Douglas

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The role of marrow architecture and stromal cells in the recovery process of aplastic marrow of lethally irradiated rats parabiosed with healthy litter mates. 骨髓结构和基质细胞在致死性辐照大鼠与健康产仔交配后再生骨髓恢复过程中的作用。

Scanning electron microscopy Pub Date : 1986-01-01

K Hayashi, K Kagawa, M Awai, S Irino

{"title":"The role of marrow architecture and stromal cells in the recovery process of aplastic marrow of lethally irradiated rats parabiosed with healthy litter mates.","authors":"K Hayashi, K Kagawa, M Awai, S Irino","doi":"","DOIUrl":"","url":null,"abstract":"Bone marrow aplasia was induced in rats by whole body lethal irradiation (1,000 rads by x-ray), and rats died of irradiation injury within 7 days. Correlative studies at light (LM), transmission (TEM) and scanning electron microscopy (SEM) demonstrated swelling of endothelial and reticular cells and hemorrhage due to detachment of sinus endothelial cells on days 1 and 2. With time, structural recovery occurred without hemopoietic recovery. Reticular cells developed small intracytoplasmic lipid droplets on days 3 and 4. This resulted in fatty aplastic marrow within 7 days. On the other hand, in the marrow of irradiated rats parabiosed with healthy mates by aortic anastomosis, hemopoiesis was initiated by adhesion of nucleated blood cells to fine cytoplasmic pseudopods of fat-stored cells on days 1 and 2 after parabiosis. On days 3 to 5, reticular cells with large lipid droplets and fine pseudopods increased, then hemopoietic foci became clear and extensive. On day 8 after parabiosis, the aplastic bone marrow recovered completely both its structure and hemopoietic activity. Thus, hemopoietic recovery in lethally irradiated marrow begins with recovery of vascular endothelial cells, re-establishment of sinusoidal structure, and morphological and functional recoveries of reticular cells from fat-storage cells by releasing intracytoplasmic lipid droplets. Marrow stromal cells, namely reticular, fat-storage and fibroblastoid cells, share a common cellular origin, and regain their structure and function when fat-storage cells and fibroid cells are placed in contact with hemopoietic precursor cells.","PeriodicalId":21455,"journal":{"name":"Scanning electron microscopy","volume":" Pt 4","pages":"1489-99"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14926038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The interface of cells and their matrices in mineralized tissues: a review. 矿化组织中细胞及其基质的界面研究进展。

Scanning electron microscopy Pub Date : 1986-01-01

S J Jones, A Boyde, N N Ali

{"title":"The interface of cells and their matrices in mineralized tissues: a review.","authors":"S J Jones, A Boyde, N N Ali","doi":"","DOIUrl":"","url":null,"abstract":"The interface between cells and matrices in mineralized tissues formed in vivo has been studied mainly by looking at the matrix surface, which is easily prepared, and not at the cell surface, which presents problems. Vertebrate calcified tissues range from being acellular to highly cellular, but for all the tissues the formative cells lay down and organise a cell-specific matrix, although this may be deposited initially on a different tissue-type. The formation of hard tissues is a group activity of many cells; resorption is the province of one cell, though it may be controlled by others in the vicinity. Cell-matrix interfaces that develop in vitro have also mainly been studied at the matrix side. The main difficulty with in vitro studies of hard tissue interfaces is that the cells do not have the same activity or even cellular functions as they had in vivo under the complex control of physiological regulation. The question of osteoblastic osteoclasis falls into this category. It is possible to provide new substrata for both formative and resorptive hard tissue cells to test for the interaction between the cells and the 'matrix' on to which they are seeded. The changing cell-matrix interface may also be modelled using computer simulation of osteoclastic movement across a substrate based on known patterns exhibited by other cell types in vitro. Comparison with the shapes of complex resorption pits shows a surprising match. This suggests that the track of the osteoclast due to cell motility and the bone resorptive mechanism resulting in pits along that track are likely to be separately controlled phenomena.","PeriodicalId":21455,"journal":{"name":"Scanning electron microscopy","volume":" Pt 4","pages":"1555-69"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14926042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chromatid behavior in late mitosis: a scanning electron microscopy analysis of mammalian cell lines with various chromosome numbers. 有丝分裂后期染色单体行为:具有不同染色体数目的哺乳动物细胞系的扫描电镜分析。

Scanning electron microscopy Pub Date : 1986-01-01

D A Welter, D A Black, L D Hodge

{"title":"Chromatid behavior in late mitosis: a scanning electron microscopy analysis of mammalian cell lines with various chromosome numbers.","authors":"D A Welter, D A Black, L D Hodge","doi":"","DOIUrl":"","url":null,"abstract":"Chromatid activity during the process of nuclear reformation following metaphase is a period of mitosis where little precise information is available. Nuclear reformation requires that chromosomes, at metaphase and chromatids during anaphase and telophase align, position and associate in a clearly defined sequence to insure the specific design of each nucleus. Four cell lines with chromosome numbers ranging from seven to almost seventy were chosen to determine whether the process of nuclear assembly is the same throughout. Chromosomal alignment at metaphase is found to be radial in all four cell lines. Chromosome positioning is essentially the same in all four, where the smaller chromosomes are located centrally and longer ones are positioned peripherally in a radial alignment. Chromosomal association is directly related to chromosome number. The more chromosomes in a one dimensional plane occupying a given area, the closer the association. In comparing the HeLaS3 and muntjac chromatids, the former has the closer association at metaphase. Since association is the most important aspect of chromatid behavior in nuclear reformation, chromatid positioning becomes a vital process during anaphase movement. Chromatid positions established during anaphase determines later positioning in the interphase nucleus because of the subsequent interconnection of adjacent chromatids by the formation of a fibrous meshwork. This fibrous meshwork, formed in anaphase and early telophase, functions to stabilize chromatids following their positioning and it also serves as a substrate or matrix for the assembly of nuclear envelope.","PeriodicalId":21455,"journal":{"name":"Scanning electron microscopy","volume":" Pt 4","pages":"1371-9"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14926162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Studies of otoconial development in a "giant-crystal" strain of chicks using scanning electron microscopy, polarized light microscopy, and X-ray crystallography. 利用扫描电子显微镜、偏振光显微镜和x射线晶体学研究一种“巨型晶体”鸡耳锥体发育。

Scanning electron microscopy Pub Date : 1986-01-01

J Ballarino, H C Howland

引用次数: 0

Experimental investigation of the genesis of struvite stones in cats. 猫体内鸟粪石形成的实验研究。

Scanning electron microscopy Pub Date : 1986-01-01

G Sanders, A Hesse, D B Leusmann

{"title":"Experimental investigation of the genesis of struvite stones in cats.","authors":"G Sanders, A Hesse, D B Leusmann","doi":"","DOIUrl":"","url":null,"abstract":"Infrared spectroscopy of feline urinary stones revealed that struvite was the main constituent in 77.6% of all concrements. However, only in 30.8% (16/52) of struvite stone patients were any infections of the urinary tract detected. Scanning electron microscopical comparison of non-infected feline struvite stones and human struvite concrements which had grown in the presence of infection revealed clear differences. All the feline struvite concrements were of coarse crystalline construction with the crystalline form typical of struvite. Traces of partial solution and stratification were frequently detected on the crystalline surfaces. The human struvite stones whose growth had been accompanied by infection did not display these features; the predominant structures in these concrements revealed very little evidence of any ordered growth. Examination of the urine and calculation of the relative supersaturation showed that where physiological pH values and physiological concentrations of lithogenic substances were present sterile urine can become supersaturated with struvite. The morphological peculiarities of the feline concrements and the results of urinary analysis indicate slow crystalline growth rates. Phases of growth alternate with periods of stagnation. This process may be influenced by dietary factors. In contrast to this, struvite stone formation in the presence of infection is characterised by rapid growth in continually supersaturated urine.","PeriodicalId":21455,"journal":{"name":"Scanning electron microscopy","volume":" Pt 4","pages":"1713-20"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14928801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0