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How you make paper white?
Paper is made of cellulose fiber. In pure form cellulose fiber is colorless but due to the presence of residual lignin, pulp obtained from wood is brown. Pulp is made white by removing and/or modifying lignin and this process is called bleaching.
What are the main chemical constituents of wood?
Wood is mainly made up of cellulose (a polysaccharide ("complex glucose") which is a compound of carbon, hydrogen and oxygen).
What is the substance that makes wood hard?
Cellulose.
Where does viscose and cellulose acetate come from?
Viscose and cellulose acetate are products derived from the chemical processing of wood.
The burning of wood is an example of an oxidation - reduction reaction?
Yes. The carbohydrates (mostly cellulose) are releasing the energy that was stored as carbon-hydrogen bonds by the trees or other plants. The hydrogen is recombined as water and the carbon mostly as carbon dioxide. Other elements in the wood also oxidize (calcium, potassium) but not as an exothermic (energy-releasing) reaction.
What are the components of wood?
cellulose ,lignin
Why is a wood a composite?
Wood is a natural composite of Cellulose fibers in a matrix of lignin
Is wood a composite?
wood is a natural composite of Cellulose fibers in a matrix of lignin
Why is wood considered a composite material?
Wood is a natural composite of Cellulose fibers in a matrix of lignin
What makes wood wood?
Wood is composed mostly of cellulose and lignin, in the form of fibers, and it comes from plants (trees or possibly shrubbery). Those are the defining characteristics of wood.
Does wood have iron in it?
Wood does not contain iron other than as an incidental contaminant; the main component compounds in wood are cellulose and lignin.
What two substances does wood contain?
Wood contains Cellulose (40-50%), hemixenluloza(15-25%) and lignin(15-30%) mainly.
In wood strong chains of cellulose and lignin are aligned in rows and layers are held in place by hydrogen bonds?
yes.
What is Wood is made of?
Wood is made of atoms. These atoms make up molecules of cellulose, bound together with molecules of lignin. Joyce in your face
What are the chemicals that make up sawdust?
Sawdust is chemically the same as wood -- it has only undergone a physical change to grind it into small pieces. Just as wood, sawdust is composed of chemicals such as cellulose and lignin, along with water.
Do pine trees contain cellulose?
Of course they do! Cellulose is found in the cell walls of all green plants and some protists, and is a major component of wood along with lignin.
What is wood?
Wood is the stem of trees inside the bark or outer layer. Wood is 50% cellulose. Cellulose is the fibrous material that gives strength to the cell walls. These cell walls are bound together with hemicellulose and lignin. Dry wood is about 25% lignin and 20% hemicellulose. There are many different types of wood. Each type of wood comes from a species of tree, and has a slightly different cell arrangement and proportions of cellulose, hemicellulose and lignin. This combination gives the types of wood their characteristic strength, texture and colour.
