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Meghna Thapar 5 years, 6 months ago
Electrolyte: A substance that dissociates into ions in solution and acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, and phosphate are examples of electrolytes, informally known as lytes. Electrolyte monitoring is important in treatment of anorexia and bulimia. Electrolyte is a substance that dissociates into ions in solution acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, magnesium, and phosphate are examples of electrolytes.
Posted by Renu Sahu 5 years, 6 months ago
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Meghna Thapar 5 years, 6 months ago
Ninhydrin reacts with the α-amino group of primary amino acids producing 'Ruhemann's purple'. The chromophore formed is the same for all primary amino acids. The intensity of the colour formed depends on the number and chemical nature of the amino groups being analysed. The optimum pH for the overall reaction is 5.5. Free amino groups will react with the ninhydrin reagent to yield a purple solution. Almost all amino acids contain a free amino group (except proline and hydroxyproline). Some proteins also give a positive test with ninhydrin. Proline and hydroxy proline give a yellow spot upon reaction with Nihhydrin. This color difference is due to the lack of a primary amine that all of the other protein amino acids have.
Posted by Harman Sandhu 5 years, 7 months ago
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Yogita Ingle 5 years, 7 months ago
Crystal lattice:
A regular arrangement of the constituent particles, i.e. atoms, ions or molecules of a crystal, in three-dimensional space.
When the constituent particles are represented by dot (.), the periodic and systematic arrangement of these dots in three dimensions is called Crystal lattice.
Unit cell:
Smallest three-dimensional portion of a complete space lattice which when repeated over and again in different directions produces the complete space lattice
If we repeat unit cell in all dimensions, we obtain a structure of the crystal.
The properties of unit cell are measured by length of edges and the angles between the edges.
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Yogita Ingle 5 years, 7 months ago
Essential amino acids cannot be synthesized in the body. They are supplied from food. The 9 essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
Aspartic acid, Alanine and Serine are non essential amino acids.
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Yogita Ingle 5 years, 7 months ago
- Salt bridge is an inverted U-tube like structure.
- The tube is filled with concentrated solution of an inert electrolyte.
- The electrolyte does not undergo any sort of chemical reaction nor does it reacts with concentrated solution in the two half cells.
- Most of the time salts like KCl, KNO3, NH4NO3 are used as electrolyte.
- Salt bridge is constructed by filing the U-tube with a mixture prepared by mixing agar-agar or gelatin with a hot concentrated solution of the electrolyte.
- The apparatus is then cooled and consequently the solution fixes within the U-tube in the form of gel.
- This prevents the intermixing of fluids.
- The either ends of the tube are then sealed using cotton wool in order to reduce diffusion.
- The main advantage of suing this bridge is that it prevents the arousal of potential difference (also called liquid junction potential) when two solutions are in contact with each other.
- It completes the electrical circuit as it connects the electrolytes in the two half cells.
- It avoids the chances of diffusion of solutions between the half cells.
- It maintains electrical neutrality by providing a path for the movement of ions.
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Nandini Nim 5 years, 6 months ago
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