What is the effect of blanching food ?

Blanching is a must for all vegetables to be frozen. It stops enzyme actions which can cause loss of flavour, texture and colour. Blanching cleanses the surface of dirt and organisms, brightens the colour and helps retan loss of vitamins.

which ever one is showing doing the same exercise in time intervals such as 30 seconds or a minute several times.

i think its pulmonary not sure tho