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Q. Can you explain Metallized films?
In metallized films, plastic films such as those of polyester, polyamide and polypropylene are coated with aluminium to enhance the barrier properties towards the passage of water vapour, gaseous volatile ingredients, light, odours and microorganisms. Metallized polyester film is a polyester film with a vacuum deposition of aluminium on one side. It is ideal for a variety of packaging end uses such as processed meat packaging, fish packaging and the packaging of snacks, candy and nuts. Metallized film is less expensive and more flexible than foil laminates which have similar barrier properties and is therefore suitable for high speed filling on form-fill-seal equipment.
Q. Are the limbs modified into wings of bats and the wings of birds instance of evolutionary homology or analogy? What about whale fins compared to fish fins? Bird and Bat wing
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the function of contractil vacuole
To study if bacteria grow better where it is warm or cold Again inoculate two sterile dishes. Label one 'warm' and the other 'cold'. Place the 1st dish in a dark warm place an
How did the first fermenting autotrophs appeared? What about the first aerobic beings? A heterotrophic hypothesis asserts that the first living beings were the fermenting heter
Plastids The term plastid first used by Haeckel (1865). These are present in plants and few protists (Euglena). On the basis of function plastids are of three types
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