Fixative used in Bakers acid hematein method.

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Multiple Choice

Fixative used in Bakers acid hematein method.

Explanation:
Baker's acid hematoxylin method relies on a fixative that preserves tissue while keeping nuclear detail available for the acid hematoxylin dye. Formol-calcium (calcium-formalin) fit this need because the calcium helps stabilize chromatin and the formaldehyde cross-links proteins gently enough to preserve nuclear staining without excessive differentiation during the subsequent steps. Other fixatives, like Bouin's or Carnoy's, can introduce pigments or cause more shrinkage and color changes that interfere with the staining, and plain formalin lacks the calcium component that this method requires. So, formol calcium is the fixative used.

Baker's acid hematoxylin method relies on a fixative that preserves tissue while keeping nuclear detail available for the acid hematoxylin dye. Formol-calcium (calcium-formalin) fit this need because the calcium helps stabilize chromatin and the formaldehyde cross-links proteins gently enough to preserve nuclear staining without excessive differentiation during the subsequent steps. Other fixatives, like Bouin's or Carnoy's, can introduce pigments or cause more shrinkage and color changes that interfere with the staining, and plain formalin lacks the calcium component that this method requires. So, formol calcium is the fixative used.

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