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SERUM CONTAINING MEDIA AND ITS COMPONENTS INTRODUCTION MEANING OF THE TERMS: 1.MEDIA 2.SERUM MEDIA Two types: *Natural Media *Artificial Media NATURAL MEDIA Extracted from biological resources *CLOTS: Plasma clots *BIOLOGICAL FLUID: Amniotic fluid. Pleural fluid.aqueous humour from eye,serum *TISSUE EXTRACT: Extract from lymph,spleen,bone marrow,chick embryo extract ARTIFICIAL MEDIA It is grouped into four classes *Serum containing media *Serum free media *Chemically defined media *Protein free media COMPOSITIONS PROTEINS: 1.FIBRONECTIN: *Attachment *spreading factors 2.TRANSFERIN: binding protein GROWTH FACTORS: 1.PGDF: Platelets Derived Growth Factor 2.EGF: Epithelial Growth factor 3.FGF:Fibroblast Growth Factor 4.IGF: Insulin like Growth Factor GROWTH HORMONES Insulin promotes the uptake of glucose n amino acids Growth hormones may be present in serum particularly foetal serum SERUM MEDIA ADVANTAGEs 1. complete media 2. Increases the viscosity 3. It acts as a buffher 4. no charged substrate is required DISADVANTAGES 1.Serum contains growth inhibitor components 2.targe variation in serum quality from one batch to other 3.it enhances the chances of contamination 4.Contains cytotoxic components.