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.
Figure: Illustrated Light pathway Comparison of Light Microscope and Transmission Electron MicroscopyElectrons 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.
Do you need apt Marketing Research Assignment Help at low prices? Contact PhD experts and get quality paper in shortest time.
Theory and lecture notes of Counter Automata all along with the key concepts of counter automata, Finite Automata with External Storage, Parenthesis expressions, parenthesis-free notation. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Counter Automata.
The Angiosperms tutorial all along with the key concepts of Common features of Angiosperms, Adaptive Features, Monocotyledoneae and Dicotyledoneae
Photometry tutorial all along with the key concepts of Photometry and eye, Photometric quantities, Photometric versus radiometric quantities, Photometric measurement methods
The Eye tutorial all along with the key concepts of vertical section of human eye, Power of the Lens, Eye Defects and their Corrections, Farsightedness (hyperopia), Nearsightedness (or myopia)
poor contrast or dim picture; but there is sufficient brightness, dim picture; insufficient brightness, out of focus or defocus, arcing in picture tube, , silvery picture
tutorsglobe.com respiration assignment help-homework help by online human physiology tutors
Combined First and Second Law tutorial all along with the key concepts of T and V Independent, P and V Independent, infinitesimal reversible process, thermodynamics relations, dependence of enthalpy on pressure
if the 1st phase, say r or a phase begins at slot no.1, the y or b phase should start at 1200/150 = 8 slots away that is, in slot (1 + 8 = ) 9, and the b or c phase should begin at (9 + 8 =) 17.
Roles of Insects and Mites as Pests and Parasites tutorial all along with the key concepts of Parasitic Mites, Parasitic mites of mammals, birds and humans, Parasitic mites of invertebrates, Insect Pests, Parasitic Insects, Biting midges, Tsetse flies and Bed bugs
tutorsglobe.com innate immunity assignment help-homework help by online immunology tutors
Theory and lecture notes of Theory of Common Mode Rejection Ratio II, all along with the key concepts of Mismatch in Gain Determining Resistors, Finite CMRR, Operational Amplifier. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Theory of Common Mode Rejection Ratio II.
tutorsglobe.com salient features of pteridophytes assignment help-homework help by online pteridophytes tutors
www.tutorsglobe.com offers answering questions to various causes of inflation, demand-pull inflation, structuralist approach, cost-push inflation, theory and concepts of inflation, economics assignment help and homework help.
Drug Bioassay and Sensitivity Tests tutorial all along with the key concepts of Drug Bioassays, Matching bioassays, Interpolation method and Drug Sensitivity Tests
1955148
Questions Asked
3689
Tutors
1480999
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!