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Methods of Preparation for Electron Microscopy - An Introduction for the Biomedical Sciences (Paperback, Softcover reprint of the original 1st ed. 1987)
Loot Price: R2,871
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Methods of Preparation for Electron Microscopy - An Introduction for the Biomedical Sciences (Paperback, Softcover reprint of the original 1st ed. 1987)
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In 1939, when the electron optics laboratory of Siemens &
Halske Inc. began to manufacture the first electron microscopes,
the biological and medical profes sions had an unexpected
instrument at their disposal which exceeded the reso lution of the
light microscope by more than a hundredfold. The immediate and
broad application of this new tool was complicated by the
overwhelming prob lems inherent in specimen preparation for the
investigation of cellular struc tures. The microtechniques applied
in light microscopy were no longer appli cable, since even the
thinnest paraffin layers could not be penetrated by electrons. Many
competent biological and medical research workers expressed their
anxiety that objects in high vacuum would be modified due to
complete dehydration and the absorbed electron energy would
eventually cause degrada tion to rudimentary carbon backbones. It
also seemed questionable as to whether it would be possible to
prepare thin sections of approximately 0. 5 11m from heterogeneous
biological specimens. Thus one was suddenly in posses sion of a
completely unique instrument which, when compared with the light
microscope, allowed a 10-100-fold higher resolution, yet a suitable
preparation methodology was lacking. This sceptical attitude
towards the application of electron microscopy in bi ology and
medicine was supported simultaneously by the general opinion of
colloid chemists, who postulated that in the submicroscopic region
of living structures no stable building blocks existed which could
be revealed with this apparatus."
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