What is the composition of wood
Wood, a natural composite material consisting essentially of dead cell wall substance and consisting of the 3 main components cellulose, hemicellulose and lignin. In addition, the so-called wood constituents (accessory wood components) occur in the H., which can be assigned to different groups of substances (e.g. terpenes, lipoids, phenols, nitrogen compounds, mineral components wood ash) and in different compositions and quantities in the various tree species and tree parts occurrence.
The wood polysaccharides are essentially the carriers of the tensile strength, the lignin the carriers of the compressive strength in the polymer composite. The wood constituents influence the smell, taste, color, impregnability, resistance to fungi and insects etc., but only to a minor extent the strength properties of the wood.
The elemental composition of wood is approximately: 50.5% carbon, 6.4% hydrogen, 43% oxygen, 0.3% mineral components (wood ash), less than 0.1% nitrogen. Extract-free wood from conifers and hardwoods consists of around 40 to 44% cellulose. Conifers, on the other hand, contain more lignin (27-32%) and less hemicelluloses (20-25%) than hardwoods (18-24% lignin, 30-35% hemicelluloses).
The components are separated on an industrial scale using the following methods:
by extraction with ethanol / benzene (separation of terpenes, lipoids, phenols, low molecular weight sugars);
by treatment with caustic soda and sodium sulphide solutions under pressure: soda or sulphate process for cellulose production (solution of lignin, resin and fatty acids; cellulose);
- What is your best store before the internet
- Why should I eat poop
- What is the chemical formula for cyclodextrin
- What does GHAA mean in Punjabi
- What brands are considered high-end devices
- What are the HR administrative activities
- People still play Gameboy
- What is your strangest dream
- What determines the focal length
- All Dendrobium orchids have seeds
- Which companies specialize in marketing mobile games?
- Why was cloud computing invented
- What was the biggest surprise in 2014
- Why didn't Joe Biden win the election?
- What are blinds and curtains
- Why can't I sell Manpasand Beverages shares?
- MLM work in the real business world
- What does incumbent mean
- How do QR codes work 1
- How Much Mac Users Spend
- Monkeys are intelligent
- How often do dentists make mistakes
- What is meant by shipping order
- What do pharmacists read
- What causes a person to cry uncontrollably
- What video game did you just beat
- Are iPhones hack-proof against viruses
- Blocks Airtel SMS from Jio
- How can I program something?
- What drives small business local retail sales
- Lightning can strike indoors
- How poor was China under Mao
- Delete your Facebook chat regularly
- Is bias inherent or developed