In this article we will discuss about the procedure for examination of drug materials. A. For Examination of Powder Drugs: The colour, taste solubility and odour of the powder was examined at first. Then a small quantity was mounted in water or glycerine on a clean slide for microscopic examination. Sometimes, lactophenol can be used as mounted for clearing of [...]
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 influence of an electric field [...]
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. Epidermis: Both upper and lower [...]