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

Meosis, briefly describe eggs and follicles

briefly describe eggs and follicles

Accidents and losses, Accidents and Losses Accident can be considered ...

Accidents and Losses Accident can be considered as an incident occurring without intention and results in injury, loss of body part or even death of a human being or a few per

Is neuron b in the frog central nervous system, IS Neuron B in the frog cen...

IS Neuron B in the frog central nervous system Consider Neuron B in the frog central nervous system whose plasma membrane has a previously unknown channel that is selectly cond

Locomotion, Locomotory apparatus in protozoa

Locomotory apparatus in protozoa

Hemoconcentration, Hemoconcentration Before, during and after CPB, hem...

Hemoconcentration Before, during and after CPB, hemoconcentration allows the patient's blood to be salvaged during surgery to help reduce the need for donor blood. Ultra

Biosynthesis of amino acids, Microorganisms and Plants can synthesize all o...

Microorganisms and Plants can synthesize all of the 20 standard amino acids. Mammals, furthermore, cannot synthesize all 20 and must obtain some of them in their diet.  Those  amin

What is symbiotic nitrogen fixation, a) What is symbiotic nitrogen fixatio...

a) What is symbiotic nitrogen fixation? b) Name the two protein components required for this process. Define their role.

Health conditions, 2. Mr Konarski, 73 years old, lives in a high-level care...

2. Mr Konarski, 73 years old, lives in a high-level care facility. He has dementia of the Alzheimer''s type, osteoarthritis in both knees and ankles, and hypertension, which is con

What is fluorescent microscope, What is Fluorescent Microscope? In abo...

What is Fluorescent Microscope? In above said microscopes, image is produced from light that passes through a specimen. In fluorescent microscope, however, specimen image is f

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