In this article we will discuss about the dissection of star fish. Also learn about:- 1. Dissection of Alimentary System 2. Dissection of Ambulacral (Water Vascular) System. The star fish has two surfaces. Aboral, the surface (Fig. 13.1) directed upwards in natural position and oral (Fig. 13.2) directed downwards. The two arms between which the madreporite lies are the bivium [...]
In this article we will discuss about the preparation of preservatives which is capable of preventing microbial infection. Formaldehyde Solution: Formaldehyde is a volatile substance. The maximum concentration can be manufactured is 40%. In preservation, commercial grade formaldehyde is used. Strength of the solution is calculated on the basis of 40 ml reagent in 100 ml formaldehyde available in the [...]
In this article we will discuss about the preparation of different stains used in microscopy. 1. Acetocarmine (Semi chon): Reagents: 45% glacial acetic acid … 100 ml Carmine powder … 10 g Preparation: Mix the two; heat up to boiling. Cool, filter and store for future use. 2. Borax Carmine: Reagents: Aqueous borax solution … 4%. Carmine solution … 3%. [...]