Scanning electron microscopy最新文献_第9页

Histochemistry of colloidal iron stained crystal associated material in urinary stones and experimentally induced intrarenal deposits in rats. 大鼠尿路结石中胶体铁染色晶体相关物质的组织化学和实验性诱导的肾内沉积。

Scanning electron microscopy Pub Date : 1986-01-01

S R Khan, R L Hackett

引用次数: 0

Development of the otolith in embryonic fishes with special reference to the toadfish, Opsanus tau. 胚胎鱼类耳石的发育，特别提到蟾蜍鱼。

Scanning electron microscopy Pub Date : 1986-01-01

B H Sokolowski

引用次数: 0

The study of biominerals by high resolution transmission electron microscopy. 生物矿物的高分辨透射电镜研究。

Scanning electron microscopy Pub Date : 1986-01-01

S Mann

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The angioarchitecture of the Lewis lung carcinoma in laboratory mice (a light microscopic and scanning electron microscopic study). 实验室小鼠Lewis肺癌的血管结构(光镜和扫描电镜研究)。

Scanning electron microscopy Pub Date : 1986-01-01

T W Grunt, A Lametschwandtner, K Karrer, O Staindl

{"title":"The angioarchitecture of the Lewis lung carcinoma in laboratory mice (a light microscopic and scanning electron microscopic study).","authors":"T W Grunt, A Lametschwandtner, K Karrer, O Staindl","doi":"","DOIUrl":"","url":null,"abstract":"53 Lewis lung carcinomas implanted subcutaneously into C57BL/6-mice were examined. The animals were killed at various stages of tumor growth (TG) and prepared for histology and for scanning electron microscopy (critical-point-dried tissue; vascular corrosion casts). Prior to casting animals were rinsed using different perfusion pressures. Casting was done by manual injection of the resin, whereby different influx-rates were applied resulting in low, medium and high pressure preparations. We discern 3 phases of tumor angiogenesis (TA) occurring during 4 stages of TG among which vasodilation establishes the first reaction of the host vascular system to a growing tumor implant. During this stage 1 of TG, tumor nidation, nearby sinusoidal dilated host capillaries form globular outgrowings (phase 1 of TA). Subsequently radially arranged sprouts, which preferentially arise from venous host vessels, grow into the centre of the implant (phase 2 of TA). Stage 2 of TG, early tumor growth, is characterized by necrosis of the central tumor tissue and the development of a central avascular cavity. Thus the tumor vascular system is organized like a hollow sphere with a central cavity and a peripheral vascular \"envelope\" with large vessels embracing the tumor and centrifugally growing vascular sprouts, which arise from the venous part of the vascular \"envelope\" and invade the surrounding host tissue (phase 3 of TA). During stage 3 of TG, late tumor growth, many vessels of the basket-like vascular \"envelope\" obliterate. In stage 4 of TG, prefinal phase, the peripheral vascular density decreases continuously. Thus vascular sprouting and proliferation of viable tumor cells is confined to basal regions of the tumor.","PeriodicalId":21455,"journal":{"name":"Scanning electron microscopy","volume":" Pt 2","pages":"557-73"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14914465","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

The motile behavior of virus-transformed 3T3 cells. 病毒转化3T3细胞的运动行为。

Scanning electron microscopy Pub Date : 1986-01-01

G Albrecht-Buehler

引用次数: 0

The quick-freezing of single intact skeletal muscle fibers at known time intervals following electrical stimulation. 电刺激后单个完整的骨骼肌纤维在已知的时间间隔内快速冷冻。

Scanning electron microscopy Pub Date : 1986-01-01

R Nassar, N R Wallace, I Taylor, J R Sommer

引用次数: 0

Visualization of cytoskeletal elements and associated retroviral antigens by immunogold transmission electron microscopy of detergent extracted cells. 用免疫金透射电镜观察洗涤剂提取细胞的细胞骨架元件和相关逆转录病毒抗原。

Scanning electron microscopy Pub Date : 1986-01-01

E J Basgall, M M Soong, W A Tompkins

引用次数: 0

Scanning electron microscopic studies on microvascular architecture of human coronary vessels by corrosion casts: normal and focal necrosis. 腐蚀铸型对人冠状动脉微血管结构的扫描电镜研究:正常和局灶性坏死。

Scanning electron microscopy Pub Date : 1986-01-01

T Ono, Y Shimohara, K Okada, S Irino

{"title":"Scanning electron microscopic studies on microvascular architecture of human coronary vessels by corrosion casts: normal and focal necrosis.","authors":"T Ono, Y Shimohara, K Okada, S Irino","doi":"","DOIUrl":"","url":null,"abstract":"Microvascular architecture of the normal human heart and myocardial focal necrosis were studied by scanning electron microscopy of corrosion casts. Casts macroscopically identical in form to the left ventricular posterior wall were prepared. The following results were obtained in the normal human heart. Most of the arterioles communicated with capillary plexuses smoothly and straightforwardly in the left ventricular posterior free wall. Arterioles which branched from the arteries ran in various directions and continued into capillaries either at right angles or obliquely in the trabeculae carneae. Capillaries running parallel with the cardiac muscle fibers ran in different directions to cross over with each other in different layers of myocardium. Capillaries in the myocardium formed a continuous and coarse net-like architecture with many bifurcations and anastomoses. Capillaries were about 5-7 micron in diameter. Some veins gathering capillaries in the epicardium ran into the myocardium and the others ran in the epicardium. Veins connecting with capillaries in the myocardium ran in the myocardial layer and communicated with larger veins. An arterio-venous anastomosis and two different types of venous-venous anastomoses were observed in the left ventricular posterior wall. At the site of focal necrosis, cross sections of dilated vessels were observed in large numbers by light microscopy and scanning electron microscopy. At the site of focal necrosis, dilated capillaries running with tortuosity were seen in large numbers by scanning electron microscopy of corrosion casts. When compared with vessels in the normal myocardium, small arterial branches were dilated and run tortuously. These dilated capillary plexuses were observed in the area which communicated with twigs branching off at the right angle from the arterial branch.","PeriodicalId":21455,"journal":{"name":"Scanning electron microscopy","volume":" Pt 1","pages":"263-70"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14856393","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

Adverse effects of metals on the alveolar part of the lung. 金属对肺肺泡部分的不良影响。

Scanning electron microscopy Pub Date : 1986-01-01

A Johansson, P Camner

{"title":"Adverse effects of metals on the alveolar part of the lung.","authors":"A Johansson, P Camner","doi":"","DOIUrl":"","url":null,"abstract":"Rabbits were exposed to low levels of metal dust or metal ions by inhalation for 1-8 months, 5 days/week and 6 h/day. Following exposure lung tissue was examined by light and electron microscopy, the lung content of phospholipid was analyzed and the morphology and function of alveolar macrophages were investigated. Metallic nickel dust as well as soluble nickel chloride produced accumulation of macrophages and laminated structures in alveoli and increased volume density of alveolar type II cells. The amount of phospholipids was elevated, mainly due to an increase in disaturated phosphatidylcholine. After one month exposure to metallic nickel dust or soluble nickel chloride, the alveolar macrophages contained surfactant inclusions and were functionally activated. After 3 and 6 months exposure to metallic nickel the macrophages were 'overfed' and inactive. A similar reaction is seen in the human disease pulmonary alveolar proteinosis. Exposure to cadmium chloride gave a similar reaction pattern as nickel did but in addition interstitial alveolitis. One month exposure to cobalt chloride affected the growth pattern of type II cells which formed nodules projecting into the alveolar lumen. Four months exposure to cobalt chloride resulted in further developed type II cell nodules, areas of hyperreactive type II cells, and interstitial inflammation. Copper chloride produced no effects apart from a slight increase in volume density of type II cells. Hexa- and trivalent chromium mainly affected the alveolar macrophages which showed enlarged lysosomes. Thus, different metal ions, in similar concentrations produced different pathological effects in the lung.","PeriodicalId":21455,"journal":{"name":"Scanning electron microscopy","volume":" Pt 2","pages":"631-7"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14917027","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

Long term effects of radiation and combined modalities on mouse lung. 放射和联合治疗对小鼠肺的长期影响。

Scanning electron microscopy Pub Date : 1986-01-01

D P Penney, P Van Houtte, D W Siemann, W A Rosenkrans, P Rubin, R A Cooper

{"title":"Long term effects of radiation and combined modalities on mouse lung.","authors":"D P Penney, P Van Houtte, D W Siemann, W A Rosenkrans, P Rubin, R A Cooper","doi":"","DOIUrl":"","url":null,"abstract":"The lung appears to be the major dose-limiting organ in radiation of the thorax. Early responses (less than 1 week) involve the type II pneumocyte and increased surfactant biosynthesis and secretion. Later changes, which appear to be related to the surfactant response, lead to classical radiation pneumonitis, which is often fatal. Animals which survive radiation pneumonitis develop progressive fibrosis, a late-appearing response, which reduces compliance and available air space, and is usually fatal. This study centers on the fine structural changes in the lungs of LAF1 mice, 63 weeks following various radiation exposures (5-13 Gy). Doses which are subthreshold in evoking surfactant and pneumonitic responses precipitate fibrosis and atelectasis by 63 weeks, and involve type II pneumocyte sloughing and degeneration. Of the two major deterrents to lung irradiation (pneumonitis and fibrosis), these results suggest that fibrosis always follows pneumonitis, but pneumonitis is not a necessary preliminary step to fibrosis. Bleomycin elicits several morphological alterations characteristic of radiation, and, when combined with the latter, appears to exacerbate radiation effects.","PeriodicalId":21455,"journal":{"name":"Scanning electron microscopy","volume":" Pt 1","pages":"221-8"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13574292","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