Assignment Help - homework help

  Transmission Electron Microscope

Transmission Electron Microscope:

The Transmission Electron Microscope is a complicated and highly advanced microscope (figure is as shown below). The Electron gun comprises a tungsten filament that whenever heated produces a beam of electrons that is then focused on the specimen by the condenser.

2344_transmission electron.jpg

   Figure: Illustrated Light pathway Comparison of Light Microscope and Transmission Electron Microscopy

Electrons cannot pass via the glass lens; therefore dough-nut-shaped electromagnets termed as magnetic lenses are employed to focus the beam. The electrons will be deflected by collisions with air molecules. Therefore, the column having the lenses and specimen is under high vacuum to acquire a clear image of the specimen on a fluorescent screen. The denser area in the specimen scatters more electrons and appears darker in the image since lesser electrons strike that region of the screen while electron transparent areas are brighter. The image captured at the screen can be made permanent on a photographic film.

Transmission electron microscopy contain high resolution and extremely helpful to observe various layers of specimens; though Transmission Electron Microscope has some drawbacks.

As electrons have limited penetrating power, only very thin part of the specimen (i.e., around100nm) can be studied efficiently. There is no 3-dimensional view. In addition specimens should be fixed, dehydrated and viewed under a high vacuum to prevent electron scattering. The procedure employed for specimen preparation, for viewing beneath Transmission Electron Microscope causes certain shrink- age and distortion.

 

Latest technology based Biology Online Tutoring Assistance

Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in General Microbiology help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for General Microbiology, project ideas and tutorials. We provide email based General Microbiology help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in General Microbiology. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Microbiology Homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of General Microbiology. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Home | Company Overview | Services | Discover Q&A | Sitemap | Contact Us | T & C | Refund Policy | Copyright Policy | Blog | Q&A | Directory

©TutorsGlobe All rights reserved 2022-2023.