food grade resin

Bakelite is made from phenol and formaldehyde in the presence of a base catalyst. It involves formation of methylene bridges at the ortho and para positions. The reaction starts with the initial formation of ortho and/or para-hydroxymethyl phenol derivatives which further react with phenol to form ..

Giant organic molecules having acidic or basic groups are known as Ion-exchange resins. Acid resins contain the acid group (- COOH). Basic resins contain the basic group [(-NH )OH - ], i.e., substituted ammonium hydroxide group. Acid and basic ion exchange resins..

Food Chain and Food Webs - "Food chain is a series of groups of organisms called trophic levels, in which, there is repeated eating and eaten by so as to transfer food energ..

Food Chains and Food Webs - While studying the biotic components in an ecosystem we have realised that food prepared by green plants is consumed by a series of consumers, both herbivores and carnivores, and finally broken down into their elements and released back into..

Food chain is a series of groups of organisms called trophic levels, in which, there is repeated eating and eaten by so as to transfer food energ..

Human Dependence on Plants and Animals for Food - Of all the living organisms, only plants are autotrophs i.e., they are capable of synthesizing their own food. Animals are heterotrophs i.e. they are incapable of synthesizing their own food. They depend on plants and o..

Food Webs - In nature, the food and feeding relationships of plants and animals are rarely as simple as the examples of food chains described above, because many animals eat more than one kind of food. On this account, different kinds of food chains..

Food is manufactured in the form of carbohydrates (sucrose) in the leaves. Thus, food is transported as sucrose along phloem. From the leaves the prepared food has to be transported to the roots, the younger top regions of the plant, the flowers and fruits. Thus,..

In nature, the food and feeding relationships of plants and animals are rarely as simple as the examples of food chains described above, because many animals eat more than one kind of food. On this account, different kinds of food chains overlap each other o..