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Phosphate-buffered saline (PBS) is a buffer solution (pH ~ 7.4) commonly used in biological research. It is a water-based salt solution containing disodium hydrogen phosphate, sodium chloride and, in some formulations, potassium chloride and potassium dihydrogen phosphate. The buffer helps to maintain a constant pH.
Buffer capacity rises to a local maximum at pH = pK a. The height of this peak depends on the value of pK a. Buffer capacity is negligible when the concentration [HA] of buffering agent is very small and increases with increasing concentration of the buffering agent. [3] Some authors show only this region in graphs of buffer capacity. [2]
aluminium hydroxide, aluminium phosphate, amino acids, formalin, MRC-5 cells, neomycin sulfate, phosphate buffers, polysorbate 20, yeast protein Human papillomavirus (HPV) aluminium hydroxide, amino acids, lipids, mineral salts, sodium dihydrogen phosphate dehydrate, type 16 viral protein L1, type 18 viral protein L1, vitamins
Good's buffers (also Good buffers) are twenty buffering agents for biochemical and biological research selected and described by Norman Good and colleagues during 1966–1980. [ 1 ] [ 2 ] [ 3 ] Most of the buffers were new zwitterionic compounds prepared and tested by Good and coworkers for the first time, though some ( MES , ADA , BES , Bicine ...
These buffers include the bicarbonate buffer system, the phosphate buffer system, and the protein buffer system. [ 7 ] Respiratory component: The second line of defense is rapid consisting of the control the carbonic acid (H 2 CO 3 ) concentration in the ECF by changing the rate and depth of breathing by hyperventilation or hypoventilation .
In the case of a phosphate buffer, substantial quantities of weak acid and conjugate weak base (H 2 PO 4 – and HPO 4 2–) can accept or donate protons accordingly in order to conserve intracellular pH: [13] [14] OH – + H 2 PO 4 – ⇌ H 2 O + HPO 4 2– H + + HPO 4 2– ⇌ H 2 PO 4 –
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.
Substance Formula 0 °C 10 °C 20 °C 30 °C 40 °C 50 °C 60 °C 70 °C 80 °C 90 °C 100 °C Barium acetate: Ba(C 2 H 3 O 2) 2: 58.8: 62: 72: 75: 78.5: 77: 75