Buffers, phthalate,

The increased germination was not the direct effect of pH alone or of the one particular buffer. Phthalate-HCl, glycine-HCl, and sodium aconitate buffers at pH 3.2 had no effect in the dark but did increase the sensitivity of seed to light. Germination in darkness occurred only when the acid or a buffered solution of gibberellin was used to moisten the substrate. 

Acid Buffer Buffer Phthalate Buffer Buffer Borate Buffer ... 

To prepare the standard pH buffer solutions recommended by the National Bureau of Standards (U.S.), the indicated weights of the pure materials in Table 8.15 should be dissolved in water of specific conductivity not greater than 5 micromhos. The tartrate, phthalate, and phosphates can be dried for 2 h at 100°C before use. Potassium tetroxalate and calcium hydroxide need not be dried. Fresh-looking crystals of borax should be used. Before use, excess solid potassium hydrogen tartrate and calcium hydroxide must be removed. Buffer solutions pH 6 or above should be stored in plastic containers and should be protected from carbon doxide with soda-lime traps. The solutions should be replaced within 2 to 3 weeks, or sooner if formation of mold is noticed. A crystal of thymol may be added as a preservative. 

Procedure. To 10 mL of a solution (Note 2) containing from 1 to 10 pg of nickel(II) add 5mL of a phthalate or acetate (ethanoate) buffer of pH 6.0 or, if the sample solution is acidic, use dilute ammonia to adjust the pH. To this solution now add 15mL of a chloroform solution of dithizone (7 x 10-5M) and 1,10-phenanthroline (3 x 10-5M). Shake the phases for five minutes in a... 

Successful electrodeposition of Sb2To3 has been reported for the first time by Leimkiihler et al. [229] who prepared polycrystalline thin films of the material on different transparent conductive oxides, as well as CdTe and Mo, from uncomplexed solutions made by mixing stock solutions of SbCb, Te02, and phthalate buffer (pH 4). The electrochemical process was discussed in detail based on results obtained by cyclic voltammetry on ITO/glass. The bath temperature was found to influence... 

Aspirin can be separated from salicylic acid by ionophoresis at a pH of 4-5.1 8 Separation of aspirin in combination products has been achieved with paper strip electrophoresis, using buffers at pH 2-8 and a 200 V. applied potential.11 9 Aspirin was separated from metabolites by paper electrophoresis in a phthalate buffer of pH 3.2 and an ionic strength of 0.0125-0.0500.150... 

The kinetics and mechanism of the ketone-bisulfite addition were studied by the use of the polarographic technique (Rao Salunke, Reaction Kinetics and Catalysis Letters 26 273, 1984).The specific rate was found to depend on pH. For an equimolar solution of bisulfite and acetone in a deaerated solution of potassium hydrogen phthalate buffer containing potassium iodide as the... 

Materials Required Ammonium nickel sulphate (pure) 0.0135 g phthalate or acetate (ethanoate) buffer (pH 6.0) 5 ml dilute ammonia solution chloroform 15 ml sodium hydroxide (0.1 M) 10.0 ml ... 

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