Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Define Thin Layer Chromatography?
This is an improvement over paper chromatography and uses thin layers of slurried absorbents like silica gel, alumina, cellulose, Kieselguhr, modified celluloses and polyacrylamide on glass plate or plastic sheet. This facilitates the adhesion of the adsorbent to the plate, binding agents such as calcium sulphate is incorporated into the slurry. Sometimes, the slurry is mixed with fluorescent dye for compounds to fluoresce under UV light. The method of running the chromatography is almost the same as that of paper. The advantage of TLC over paper chromatography is the time required for development is considerably less and secondly the fineness of the adsorbent powder ensures very rapid capillary flow of the solvent along the layer of adsorbent and hence considerable sharpness of the spots from original.
The methods for detecting the spots are same as paper, with an added advantage of spraying with 25% H2SO4 or keeping the plate in iodine vapours. Both the methods are useful for qualitative and quantitative purposes.
Q What are pneumatic bones? Birds have lightweighted bones with internal spaces filled with air. These bones are called pneumatic bones this feature reduces the corporal densit
how twins are produced and why
Structural Features of Viruses Size of Viruses Virus particles vary widely in size. The smallest viruses e.g. virus of foot and mouth disease measuring about 20 mill mic
When do you use the term 2' carbon and when do you use 2 carbons on a molecular structure? I need examples please!
Gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist. They may act by binding either to control parts within the promoter region nea
Q. In general what is the phase of the menstrual cycle when copulation may lead to fecundation? Although this is not a rule, to be effective fecundation in general must occur w
learn allchapter
Q. What are the major negative ions found in living beings? The main anions found in living beings are the chlorine anion (Cl - ), the sulphate anion (SO - ), the nitrate ani
Coiling of garden pea tendrils around any support is an example of: 1. Thigmotaxis 2. Thigmonasty 3. Thigmotropism 4. Thermotaxis Thigmotropism
Define about Calcium and Osteoporosis? Gain in bone mass occurs throughout childhood; however, during adolescent growth spurt, the gain in bone mass, as well as, calcium retent
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd