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

Lymphatic vessels, Lymphatic Vessels The function of lymphatic vessel...

Lymphatic Vessels The function of lymphatic vessels is to aid in the return of interstitial fluid to intra-vascular volume. They assist with transport of lipids from th

Pulse oximetry readings, Outline three client considerations when taking an...

Outline three client considerations when taking an accurate pulse oximetry reading.

Proteins, .please i need someone who can finish the assignment today , and ...

.please i need someone who can finish the assignment today , and one reliable who will not cancel the order at last time.in regards to the assignment, the are two pages of question

Determine the age of an oak tree, One can verify the age of an oak tree by ...

One can verify the age of an oak tree by counting the annual rings of formed by the. a.  primary xylem, apical meristem b.  secondary phloem, vascular cambium c.  dermal

Gaseous exchange, Gaseous Exchange Gaseous exchange is take place on b...

Gaseous Exchange Gaseous exchange is take place on by both mantle and the gills. The gills of most bivalves are highly changed for filter feeding. They are derived from the pr

Evaluating the wound assessment , I will send any further instructions to y...

I will send any further instructions to you. The ist part of the assessment (1-7) that evaluates the chart i have done but it needs to be looked at to see if content okay & gram

Defination of behaviour change communication, Q. Defination of Behaviour Ch...

Q. Defination of Behaviour Change Communication? Behaviour Change Communication (BCC) is an interactive process with communities to develop specific messages and methods using

Is a viral infection treated with drug, Q. Is a viral infection treated wit...

Q. Is a viral infection treated with the same kind of drug that treats bacterial infections? The Antibacterial drugs, potent against a great variety of bacteria, are not effect

How to calculate fractional shbrtening, Q. How to calculate Fractional Shbr...

Q. How to calculate Fractional Shbrtening? With the cursor- beam cutting the left ventricle just beyond the tips of mitral valve in an adequate parasternal long axis view,

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