the effects of sodium n-dodecyl sulphate (sds) on the structure of histone hi has been studied by a combination of e:quilibrium dialysis, u.v. spectroscopy ; polyacrylamide gel electrophoresis, protein titration and viscometery techniques using, 2.5 mm phosphate buffer, ph 6.4. the interaction of h, and sds in contrast tomanyothel-protein-sds interactions is organized between v 40 to 70. above ...

Acid or base concentrations can be determined by coulometric titration. A new alliridium oxide sensor-actuator device is presented, of which the titrant is generated by a reversible redox reaction occurring in the electroactive iridium oxide actuator electrode, and the equivalence point in the titration curve is detected by the pH-sensitive iridium oxide sensor. The advantage with respect to th...

It has been shown earlier that the titration curves of wool and other proteins obtained with different strong acids differ widely in position with respect to the pH coordinate. By assuming that these differences were due to combination of the protein with anions as well as with hydrogen ions, it was possible to calculate from the pH of the midpoint of each curve numerical values of tbe affinity...

The use of natural materials began to be developed on a large scale in chemistry. Natural substances are safe use, easy find, and cheaper. Biological indicators volumetric titration the focus experts. This study presented visualization alkalimetric weak acid with strong base addition indicators. Hibiscus rosa-sinensis L. Clitoria ternatea flowers were used as for diprotic acid, namely oxalic ba...

This paper describes a microfluidic device, fabricated in poly(dimethylsiloxane), that is used for potentiometric titrations. This system generates step gradients of redox potentials in a series of microchannels. These potentials are probed by microelectrodes that are integrated into the chip; the measured potentials were used to produce a titration curve from which the end point of a reaction ...

S1 Modeling the Looping Probability. 2 S1.1 Tuning the simple titration curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 S1.2 The case of multiple looped states. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 S1.3 Effect of an “inactive fraction” of repressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 S1.4 Effect of the presence of dimers...

BACKGROUND Although intravenous morphine titration is widely used to obtain rapid and complete postoperative pain relief, the relationship between measurement of pain and morphine requirements varies, and the evolution of pain during titration is poorly understood. METHODS Intravenous morphine titration was administered as a bolus of 2 (body weight < or = 60 kg) or 3 mg (body weight > 60 kg) ...

This paper describes a modification of the Wassermann test giving an improved standardization of the complement titration and of the haemolytic system which is suitable to the resources of a small laboratory. Advantage has been taken of the stability of complement preserved by the method of Richardson (1941), so that modern methods for the standardization of the haemolytic system can be include...