Waxes, Biology

WAXES

  1. These are monoglyceride compounds.
  2. They are chemically inert (due to absence of double bonds) and insoluble in water.
  3. On heating they become soft and pliable.
  4. On cooling they turn hard and water resistant.
  5. Waxes are common water repellent and lubricant lipids of plants and animals.
  6. Most land plants possess wax as bloom over fruits and other soft organs. It is also a component of cuticle over leaf surfae for reducing transpiration.
  7. In floating leaves the upper surface is covered by wax in order to prevent wetting and closing of stomata present on the upper surface.
  8. Lanolin (= lanoline) or wool fat is a wax secreted by cutaneous glands in fur bearing animals for providing a protective water proof coating to fur.
  9. Similarly water proof coating of wax occurs over feathers, human skin and insect skeleton.
  10. Whale, which consumes plankton in large quantity, comes to store the same lubricating wax, spermaceti, used to be got form Sperm Whale. It is the hardest wax.
  11. Bees wax is secreted by worker bees from their abdominal glands for building honey combs. It is formed by esterification of palmitic acid with mericyl and hexacosyl alcoholes. It's chemical name is meyricyl palmitate.
  12. Candle wax is a mixture of paraffin was (from petropleum) and stearic acid.
  13. Cerumen or ear wax is secreted by modified sweat glands or ceruminous glands present in the ear canal. It lubricates ear drum. It's more secretion is ciruminosis.
Posted Date: 10/9/2012 5:13:37 AM | Location : United States







Related Discussions:- Waxes, Assignment Help, Ask Question on Waxes, Get Answer, Expert's Help, Waxes Discussions

Write discussion on Waxes
Your posts are moderated
Related Questions
Q. What is continuous full thickness incision? 2. Continuous full - thickness incisions are indicated for a variety of situations outlined below. This type of incision may be u


describe the structure of a lung in terms of covering membranes and cavities

Fowl pox Fowl-pox is a highly infectious disease of poultry, especially chickens and turkeys. Pheasants, ducks, geese and guineafowls also suffer from an infection similar to f

How can I become involved in supporting brain research? A. Here are some ways which you can support brain research: Join in activities of Brain Awareness Week. Dona

Q. Is there a larval stage in echinoderms? In echinoderms embryonic development is indirect, with ciliated larvae.

What is Quantitative Techniques? Microbial quality of substances like food, milk, air, water, soil etc. can be assessed both qualitatively and quantitatively. Quantitative enum

Anti-retroviral drugs are given to the patient. They lesser the viral load and gives relief from infection, but it is not lasting it is temporary relief i.e. it cannot cure.

Contact Osteogenesis: In this the osteogenic cells attach to the implant surface and the new (de novo) bone is formed on the implant surface first. The developing bone matrix can d

Explain Effect of Nutrient Supplements on Drugs? A nutrient or nutrient supplement can alter the pharmacological action of a drug by enhancing the drug effect or by opposing it