A Simplified Method of Conversion of Standard Intermittent Motion-Picture Projectors for Use with Television Pickup Tubes

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

Download Full-text

A simplified method of emulsion coating and development for quantitative electron microscopic radioautography

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100081188 ◽

1978 ◽

Vol 36 (2) ◽

pp. 64-65

Author(s):

K. Yoshida ◽

F. Murata ◽

S. Ohno ◽

T. Nagata

Keyword(s):

Mass Production ◽

Identical Condition ◽

Microscopic Level ◽

Electron Microscopic Level ◽

Electron Microscopic ◽

Simplified Method ◽

Complicated Process ◽

Critical Problems ◽

Electron Microscopic Radioautography ◽

Quantitative Radioautography

IntroductionSeveral methods of mounting emulsion for radioautography at the electron microscopic level have been reported. From the viewpoint of quantitative radioautography, however, there are many critical problems in the procedure to produce radioautographs. For example, it is necessary to apply and develop emulsions in several experimental groups under an identical condition. Moreover, it is necessary to treat a lot of grids at the same time in the dark room for statistical analysis. Since the complicated process and technical difficulties in these procedures are inadequate to conduct a quantitative analysis of many radioautographs at once, many factors may bring about unexpected results. In order to improve these complicated procedures, a simplified dropping method for mass production of radioautographs under an identical condition was previously reported. However, this procedure was not completely satisfactory from the viewpoint of emulsion homogeneity. This paper reports another improved procedure employing wire loops.

Download Full-text

Rate of Sublimation of Ice by Radiative Heating in Freeze-Etching

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s1431927600002701 ◽

1980 ◽

Vol 38 ◽

pp. 618-619

Author(s):

Yeshayahu Talmon

Keyword(s):

Heat Flux ◽

Freeze Fracture ◽

Constant Heat Flux ◽

Radiative Heating ◽

Constant Heat ◽

Entire Sample ◽

Simplified Method ◽

Freeze Etching ◽

Sublimation Rates ◽

Fractured Surface

To bring out details in the fractured surface of a frozen sample in the freeze fracture/freeze-etch technique,the sample or part of it is warmed to enhance water sublimation.One way to do this is to raise the temperature of the entire sample to about -100°C to -90°C. In this case sublimation rates can be calculated by using plots such as Fig.1 (Talmon and Thomas),or by simplified formulae such as that given by Menold and Liittge. To achieve higher rates of sublimation without heating the entire sample a radiative heater can be used (Echlin et al.). In the present paper a simplified method for the calculation of the rates of sublimation under a constant heat flux F [W/m2] at the surface of the sample from a heater placed directly above the sample is described.

Download Full-text