Biopolymers are polymers created naturally occuring biomass such as cellulose. They have superior properties than normal synthetic polymers are they are biodegradable, renewable and biocompatible.
An example of a biopolymer is cellulose or starch. However, there have been developments to...
Cellulose is a natural condensation polymer composed of thousands of glucose monomers. During condensation polymerisation, the beta glucose monomers link together by 1-3 glycosidic bond to form cellulose. This glycosidic bond forms when two -OH react and condense out a water molecule.
Celloluse...
Sulphur dioxide is used to produce sulphorous acid to preserve food such as pickles. It's low pH prevents the growth of microbes, allowing the food to stay fresher longer.
For xy = 1/2 a^2
The focus is (a,a) ; (-a,-a)
Directices: x + y = a and x + y = -a
Eccentricity is always rt 2
so for xy=c^2
focus is ( rt 2 c ,rt c ) and ( -rt 2 c, - rt 2 c) ... just memorise it