منابع مشابه
How Thin Should a Section Be?
In considering the electron microscopic study of sections of tissue as a practical approach to the study of cell structure, the cytologist is faced with a number of possible decisions with respect to the way in which he will prepare his material. Not the least of these is the problem of how thin the section of tissue should be to serve his purpose. A useful section of a sample must satisfy the ...
متن کاملHow Thin Should a Section Be?
Ornstein (1956) has recently discussed the maximum useful thickness of a section for electron microscopy, as limited by the energy loss of the beam in traversing it and by the chromatic aberration of the objective lens. For working voltages of 50 to 60 kv. his conclusion is almost identical with that which we initially established experimentally (Cosslett, 1951) and later supported by theoretic...
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This study was a qualitative research which was done by a case study approach. The samples were chosen from rural development experts of Hamedan Province during a snowball sampling process. The data were collected by the semistructured interviews. The data collection was done by faceto- face interviews, after the interview questions guide was determined. The theoretical saturation was attained ...
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The Berlin definition criteria applied at positive end-expiratory pressure (PEEP) 5 cm H2O reasonably predict lung edema and recruitabilty. To maintain viable gas exchange, the mechanical ventilation becomes progressively more risky going from mild to severe acute respiratory distress syndrome (ARDS). Tidal volume, driving pressure, flow, and respiratory rate have been identified as causes of v...
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Viewing document images on small devices is a challenge. When showing a region of a page for reading on a small display a page overview is generally lost. If a page overview is desired, typically a low resolution version of the image fitting a small array of pixels a thumbnail is provided. Whereas the readability of text in thumbnails is often lost, document layout information may or may not be...
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ژورنال
عنوان ژورنال: The Journal of Biophysical and Biochemical Cytology
سال: 1956
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.2.4.53