scanning electron microscope

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microscope

 [mi´kro-skōp]
an instrument used to obtain an enlarged image of small objects and reveal details of structure not otherwise distinguishable.
The light path of a darkfield microscope. From Hart and Shears, 1997.
acoustic microscope one using very high frequency ultrasound waves, which are focused on the object; the reflected beam is converted to an image by electronic processing.
binocular microscope one with two eyepieces, permitting use of both eyes simultaneously.
compound microscope one consisting of two lens systems whereby the image formed by the system near the object is magnified by the one nearer the eye.
darkfield microscope one so constructed that illumination is from the side of the field so that details appear light against a dark background.
electron microscope one in which an electron beam, instead of light, forms an image for viewing, allowing much greater magnification and resolution. The image may be viewed on a fluorescent screen or may be photographed. Types include scanning and transmission electron microscopes.
fluorescence microscope one used for the examination of specimens stained with fluorochromes or fluorochrome complexes, e.g., a fluorescein-labeled antibody, which fluoresces in ultraviolet light.
light microscope one in which the specimen is viewed under ordinary illumination.
operating microscope one designed for use in performance of delicate surgical procedures, e.g., on the middle ear or small vessels of the heart.
phase microscope (phase-contrast microscope) a microscope that alters the phase relationships of the light passing through and that passing around the object, the contrast permitting visualization of the object without the necessity for staining or other special preparation.
scanning electron microscope (SEM) an electron microscope that produces a high magnification image of the surface of a metal-coated specimen by scanning an electron beam and building an image from the electrons reflected at each point.
simple microscope one that consists of a single lens.
slit lamp microscope a corneal microscope with a special attachment that permits examination of the endothelium on the posterior surface of the cornea.
stereoscopic microscope a binocular microscope modified to give a three-dimensional view of the specimen.
transmission electron microscope (TEM) an electron microscope that produces highly magnified images of ultrathin tissue sections or other specimens. An electron beam passes through the metal-impregnated specimen and is focused by magnetic lenses into an image.
x-ray microscope one in which x-rays are used instead of light, the image usually being reproduced on film.

scan·ning e·lec·tron mi·cro·scope

a microscope in which the object in a vacuum is scanned in a raster pattern by a slender electron beam, generating reflected and secondary electrons from the specimen surface that are used to modulate the image on a synchronously scanned cathode ray tube; with this method a three-dimensional image is obtained, with both high resolution and great depth of focus.

scan·ning e·lec·tron mi·cro·scope

(skan'ing ĕ-lek'tron mī'krŏ-skōp)
A microscope in which the object in a vacuum is scanned in a raster pattern by a slender electron beam, generating reflected and secondary electrons from the specimen surface that are used to modulate the image on a synchronously scanned cathode ray tube; with this method a three-dimensional image is obtained, with both high resolution and great depth of focus.

scanning electron microscope

see ELECTRON MICROSCOPE.

scan·ning e·lec·tron mi·cro·scope

(skan'ing ĕ-lek'tron mī'krŏ-skōp)
A microscope in which the object in a vacuum is scanned in a raster pattern by a slender electron beam, generating reflected and secondary electrons from the specimen surface that are used to modulate the image on a synchronously scanned cathode ray tube; with this method a three-dimensional image is obtained, with both high resolution and great depth of focus.
References in periodicals archive ?
que incluyo 125 pacientes se demostro que el rendimiento de los stents metalicos autoexpansibles fue superior al de los stents plasticos en todas las clasificaciones de Bismuth-Corlette para colangiocarcinoma hilar con respecto a la permeabilidad del stent (p<0.0001), con un tiempo medio de oclusion de 5.56 meses (IC del 95%: 4,39-9,08 meses) para los SEMS vs 1,86 meses (IC del 95%: 1,55-2,57 meses) para los stents plasticos, sin aumento en las complicaciones.
In conclusion, SEMS implantation is a highly effective treatment for eliminating a variety of complications following surgery, starting oral feeding at an early period, shortening the duration of hospital stay, eliminating/palliating symptoms such as pain, preventing aspiration-associated infections, reducing overall cost, preventing recurrent laparotomies, and improving the quality of life (17-19).
They were both treated with an uncovered duodenal SEMS. One patient in the SEMS group was admitted with a bleeding gastric ulcer.
Between February 2013 and December 2014, 59 consecutive patients (31 men and 28 women; median age, 67 years; range, 23-88 years) with unresectable MDBO were treated with SEMS and enrolled in this study.
Use of self-expandable metal stents (SEMS) for duodenal stenting is less invasive and can be performed under conscious sedation6.
Initially, a partially covered SEMS was inserted into the main left bronchus with a distal opening into the left lower lobe bronchus (length 30 mm, diameter 8 mm).
The scope was then reinserted alongside the stent delivery system and the SEMS carefully deployed under direct vision, allowing for adjustment of its position.
In the currently available solutions these variables are not considered, so to achieve high efficiency from SEMS is quite difficult.
The Development Bank of the Philippines participated in this study and it is heartwarming to note that DBP was found to have a formal, comprehensive and advance SEMS, although with a distinct bias towards environmental concerns.
Even with all the good that is generated from these alternative economic structures, sharing economy models (SEMs) often lack dispute resolution structures for managing disputes themselves.
The Smart Energy Management System (SEMS) [1] built by Institute of Software Application Technology Guangzhou & Chinese Academy of Sciences (ISCAS) uses PLC link to connect light controller nodes and the centralized controllers.
The auditors that will check to see if SEMS plans are being used offshore are consultants, pre-qualified through the Center of Offshore Center, an industry-created and owned entity.