A. G. Tiselius (1937) Performed Moving boundary electrophoresis  in a U-shaped tube using Schlieren optics on both end for Measurements of the electrophoretic mobilities.

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#Id: 4480

#Unit 13. Methods in Biology

Histological samples are often stained with hematoxylin and eosin (“H&E stain”).

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#Id: 4481

#Unit 13. Methods in Biology

Hematoxylin binds to basic amino acids (lysine and arginine).

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#Id: 4482

#Unit 13. Methods in Biology

Eosin binds to acidic molecules (DNA and side chains of aspartate and glutamate).

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#Id: 4483

#Unit 13. Methods in Biology

Darkfield microscopy is used for very thin spirochetes, such as Treponema pallidum, the causative agent of syphilis.

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#Id: 4484

#Unit 13. Methods in Biology

The electrocardiogram (ECG or EKG) is a measures the electrical activity of the heart.

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#Id: 4485

#Unit 13. Methods in Biology

P wave represents depolarization of the atria.