A Preliminary Report on the Development of a 300‐Kilovolt Magnetic Electron Microscope

1941 ◽  
Vol 12 (10) ◽  
pp. 738-742 ◽  
Author(s):  
V. K. Zworykin ◽  
J. Hillier ◽  
A. W. Vance
Keyword(s):  
Electron Microscope ◽  
Preliminary Report ◽  
Magnetic Electron

A Preliminary Report on the Thraustochytrid(s) and Labyrinthulid(s) Associated with a Pathological Condition in the Lesser Octopus Eledone cirrhosa

1980 ◽  
Vol 23 (11) ◽  
Author(s):  
Jane L. Polglase
Keyword(s):  
Electron Microscope ◽  
Preliminary Report ◽  
Pathological Condition ◽  
Skin Ulcers ◽  
Body Tissues

AbstractA pathological condition occurring in the lesser octopus, Eledone cirrhosa, is described. This results in progressive ulceration of the skin of the animal, followed by oedema of body tissues and death. Light and electron microscope studies of the skin ulcers reveal the constant presence of thraustochytrid-like organism(s) and often, although not in all instances, the presence of a presumed labyrinthulid. Studies are currently in progress to identify both these organisms and to establish the role that they play in the condition described.

scholarly journals Epicuticular wax on stomata of damaged silver fir trees (Abies alba Mili.)

2011 ◽  
Vol 74 (2) ◽  
pp. 159-166 ◽  
Author(s):  
Tomislav Bačić ◽  
Ljiljana Krstin ◽  
Jadranka Roša ◽  
Željko Popović
Keyword(s):  
Air Pollution ◽  
Electron Microscope ◽  
Gas Exchange ◽  
Preliminary Report ◽  
Abies Alba ◽  
Silver Fir ◽  
Abaxial Surface ◽  
Different Types ◽  
Very High ◽  
Scanning Electron

Condition of epistomatal wax on the abaxial surface of the current and previous-year needles of damaged silver fir trees (<em>Abies alba</em> Mill.), both from the polluted Risnjak and "clean" Donja Dobra sites in Gorski Kotar region, both influenced by pollutants coming from Europe, during two years, three times a year, were examined with Scanning Electron Microscope. In the course of time the wax tubules on the epistomatal rims of stomata in polluted, but also in "clean" needles surface, become fused and agglomerated rapidly to various extents of morphologically different types of amorphous wax crusts, primarily compact and particulate ones. This process begins very early, especially in polluted Risnjak site, and may be interpreted as a possible result of air pollution. However, the recrystalization, or production of new tubules, also appears relatively quickly in mostly cases. Quantitative estimations indicate a very large total amount of amorphous wax crusts in the current-year needles, and a very high percentage of the same wax in previous-year needles. Amorphous wax crusts cover stomatal pores, as well as the rims, disturbing the normal gas exchange. Statistically there is a signicant tendency of increase in wax degradation in the needles of the polluted site in comparison with those of the unpolluted one, but there is an insignificant wax degradation among the needles of damaged trees within each site. These results confirmed most of the research done in our preliminary report.

IMPROVED POLE PIECE CONSTRUCTION OF THE OBJECTIVE LENS OF A MAGNETIC ELECTRON MICROSCOPE

1940 ◽  
Vol 18a (11) ◽  
pp. 175-177 ◽  
Author(s):  
Albert Prebus
Keyword(s):  
Electron Microscope ◽  
Objective Lens ◽  
Pole Piece ◽  
University Of Toronto ◽  
New Form ◽  
The University ◽  
Magnetic Electron

The paper is a description of a new form of pole piece devised for the electron microscope developed at the University of Toronto.

scholarly journals Electron Microscope Study of a Cell-Free Induced Leukemia of the Mouse: A Preliminary Report

1958 ◽  
Vol 4 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Étienne de Harven ◽  
Charlotte Friend
Keyword(s):  
Electron Microscope ◽  
Microscope Study ◽  
Preliminary Report ◽  
Electron Microscope Study ◽  
Leukemic Cells ◽  
Virus Like Particles ◽  
Preliminary Results ◽  
Mouse Tumors ◽  
A Cell

Preliminary results of an electron microscope study of a leukemia of the mouse transmissible by cell-free filtrates are reported. In twelve out of forty-seven specimens examined, virus-like particles were observed. So far, these particles have not been observed in control, non-leukemic animals. They are located inside the cytoplasm of leukemic cells which infiltrate the spleen or the liver. Their diameter is approximately 78 mµ. Their resemblance to other particles recently described in different mouse tumors is stressed. Their significance and, in correlation with ultrafiltration data, their possible etiological meaning are discussed.

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