منابع مشابه
Carbon Films and Specimen Stability
In recent years a subject which has received little attention is the question of motion of the specimen relative to the objective lens of the electron microscope. In ordinary electron microscopy, where resolutions better than 30 A are not required, one can tolerate drift of the object (during a 5 second exposure of the plate) of perhaps 1 to 3 A per second, while for high resolution microscopy ...
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Stability of thin boron-carbon films on silicon substrates was studied. EPMA measurements were used for the film characterization. If the background pressure in the setup was lower than 5 x 1 0 ~ Torr the oxygen content in the films did not exceed 3 at.%. The concentration of oxygen in the films increased considerably as a result of bad basic vacuum or insufficient degassing of precursor. While...
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Assembling clusters on surfaces has emerged as a novel way to grow thin films with targeted properties. In particular, it has been proposed from experimental findings that fullerenes deposited on surfaces could give rise to thin films retaining the bonding properties of the incident clusters. However the microscopic structure of such films is still unclear. By performing quantum molecular dynam...
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The goal of this research is to revisit the stability results of Yeow (1974) on extending flows with free surfaces. The eigenvalue problem is formulated and solved for the flow of a Newtonian film such as the one encountered in film casting. The stable and unstable region boundaries is obtained. The analysis is extended to a non-isothermal case similar to the work by Shah and Pearson (1972) and...
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منطقه ی آسیای مرکزی وقفقاز به عنوان منطقه ای تاریخی و به دلیل دارا بودن ذخایر عظیم هیدرو کربنی از اهمیت ویژه ای برخوردار است. کشورهای این منطقه از عوامل عمده ی بی ثباتی نظیر عوامل جغرافیایی، اقتصادی، امنیتی، اجتماعی و سیاسی رنج می برند. پس از فروپاشی اتحاد جماهیر شوروی کشورهای منطقه از نعمت استقلال ناخواسته ای برخوردار شدند که مشکلات فوق را برای آن ها چندین برابر می کرد. در این روند برخی از این...
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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.2.4.31