Waxes, Biology

Assignment Help:

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.

Related Discussions:- Waxes

Determine the estimation of minerals in foods, Estimation of minerals in fo...

Estimation of minerals in foods The minerals in foods are determined by ashing or incineration at temperatures in the region of 500°C following standard procedure. This destroy

Describe metabolic syndrome, Describe Metabolic Syndrome ? As discussed...

Describe Metabolic Syndrome ? As discussed, the risk factors like obesity, high blood pressure, high blood glucose or impaired glucose tolerance, and dyslipidaeinia are very im

Cell, What is suisidel bag in plant?

What is suisidel bag in plant?

Define nutritional needs of the elderly, Define Nutritional Needs of the El...

Define Nutritional Needs of the Elderly? In this, we learnt about the nutritional needs of the elderly, and in doing so we have also focused on many other aspects such as who d

Parasitic flat worms, plese help for an assignment of topic parasitic flat ...

plese help for an assignment of topic parasitic flat worms for a first year zoology student.

Female reproductive disorders-retained foetal membranes, Retained foetal me...

Retained foetal membranes The foetal membranes are normally expelled within 6to 12 hr after parturition in cows and buffaloes. If the foetal membranes are not voided even upto

What do you mean by maxilla, Q. What do you mean by Maxilla? The maxill...

Q. What do you mean by Maxilla? The maxilla has ample keratinized tissue that covers the entire palate. This tissue is well-attached and more difficult to mobilize. Nevertheles

Fermentation, what is steroid production by microbial metabolism

what is steroid production by microbial metabolism

Specialized structures that help the adhesion between cells, Q. What are th...

Q. What are the specialized structures that help the adhesion between cells? The structures responsible for the union of the epithelial cells are called cell junctions. The mai

Explain denaturation and coagulation, Explain Denaturation and coagulation ...

Explain Denaturation and coagulation Denaturation and coagulation of the proteins are considered to be the chemical changes, since they involve the unfolding of proteins, whic

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd