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DPPH-I (m.p. 106 °C) is orthorhombic, DPPH-II (m.p. 137 °C) is amorphous and DPPH-III (m.p. 128–129 °C) is triclinic. [2] DPPH is a well-known radical and a trap ("scavenger") for other radicals. Therefore, rate reduction of a chemical reaction upon addition of DPPH is used as an indicator of the radical nature of that reaction.
An example given states that a 12C solution is equivalent to a "pinch of salt in both the North and South Atlantic Oceans", [24] [25] which is approximately correct. [26] One-third of a drop of some original substance diluted into all the water on earth would produce a preparation with a concentration of about 13C. [27] [28] [29]
The National Pharmaceutical Pricing Authority (NPPA) is a government regulatory agency that controls the prices of pharmaceutical drugs in India. [1] National Pharmaceutical Pricing Authority (NPPA) was constituted vide Government of India Resolution dated 29 August 1997 as an attached office of the Department of Pharmaceuticals (DoP), Ministry of Chemicals and Fertilizers as an independent ...
"Drugs and Cosmetics Rules, 1945" (PDF). Central Drugs Standard Control Organization.Archived from the original (PDF) on 31 October 2005.; A Review on the Current Classification and Regulatory Provisions for Medicines in Drug & Cosmetic Act, in the light of Present Day Context Recommendations for Drugs & Cosmetics Rules with context of Drug Schedules
Standard solutions are generally prepared by dissolving a solute of known mass into a solvent to a precise volume, or by diluting a solution of known concentration with more solvent. [1] A standard solution ideally has a high degree of purity and is stable enough that the concentration can be accurately measured after a long shelf time. [2]
Cashew Export Promotion Council of India [11] CEPCI [12] 6 Chemicals and Allied Products Export Promotion Council [13] CAPEXIL [14] 7 Coffee Board [15] - 8 Coir Board [16] - 9 Council for Leather Exports [17] CLE [18] 10 EEPC India [19] EEPC [20] 11 Export Promotion Council for Handicrafts [21] EPCH [22] 12 Gem and Jewellery Export Promotion ...
Dilution is the process of decreasing the concentration of a solute in a solution, usually simply by mixing with more solvent like adding more water to the solution. To dilute a solution means to add more solvent without the addition of more solute. The resulting solution is thoroughly mixed so as to ensure that all parts of the solution are ...
McIlvaine buffer is a buffer solution composed of citric acid and disodium hydrogen phosphate, also known as citrate-phosphate buffer.It was introduced in 1921 by the United States agronomist Theodore Clinton McIlvaine (1875–1959) from West Virginia University, and it can be prepared in pH 2.2 to 8 by mixing two stock solutions.