In this article we will discuss about the microscopic examination of some drug materials. 1. Swertia Chirayita (Family: Gentianaceae): Fragments of epidermal cells with cruciferous type of stomata, acicular crystals of calcium oxalate present in the cortical cells and in the mesophyll cells; some cortical cells contain resins, vessels having bordered pits on the walls. […]
Microscopic Examination of Some Drug Materials
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Electrophoresis (With Diagram)
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The term electrophoresis describes the migration of a charged particle under the influence of an electrical field. Many important biomolecules — such as peptide, proteins nucleotides and nucleic acids — possess ionisable groups and, therefore, at any given pH, exist in solution as electrically charged species either as cations (+) or anions (-). Under the […]
Examples of Anatomical Changes in Plants
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A number of plants develop unique adaptive modifications to overcome the various environmental stress. These modifications include alteration of gross morphological features as well as anatomical structures. Some examples of anatomical changes are given: A. Loaf Anatomy of Nerium sp. (Fig. 8.1): The T.S. view of Nerium leaf shows the following layers of tissues: 1. […]
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