Reference curve

The system compares its own values for good and a bad magnetic particle suspensions with the actually measured values. The system values are stored in the form of reference curves for a fresh MP-suspension used on the machine and the used MP-suspension which has to be changed. 

Fig. V-13. Composite x/ln a curve for 3-pentanol. The various data points are for different E values each curve for a given E has been shifted horizontally to give the optimum match to a reference curve for an E near the electrocapillary maximum. (From Ref. 134.)...

We will now look at how different types of wave functions behave when the O-H bond is stretched. The basis set used in all cases is the aug-cc-pVTZ, and the reference curve is taken as the [8, 8J-CASSCF result, which is slightly larger than a full-valence Cl. As mentioned in Section 4.6, this allows a correct dissociation, and since all the valence electrons are correlated, it will generate a curve close to the full Cl limit. The bond dissociation energy calculated at this level is 122.1 kcaPmol, which is comparable to the experimental value of 125.9 kcal/mol. 

The angle bending in H9O occurs without breaking any bonds, and the electron correlation energy is therefore relatively constant over the whole curve. The HF, MP2 and MP4 bending potentials are shown in Figure 11.14, where the reference curve is taken from a parametric fit to a large number of spectroscopic data. ... 

Procedure. Dissolve a weighed portion of the substance in which the amount of iron is to be determined in a suitable acid, and evaporate nearly to dryness to expel excess of acid. Dilute slightly with water, oxidise the iron to the iron(III) state with dilute potassium permanganate solution or with a little bromine water, and make up the liquid to 500 mL or other suitable volume. Take 40 mL of this solution and place in a 50 mL graduated flask, add 5 mL of the thiocyanate solution and 3 mL of AM nitric acid. Add de-ionised water to dilute to the mark. Prepare a blank using the same quantities of reagents. Measure the absorbance of the sample solution in a spectrophotometer at 480 nm (blue-green filter). Determine the concentration of this solution by comparison with values on a reference curve obtained in the same way from different concentrations of the standard iron solution. 

The intensities of absorption change proportions between sample and reference curves. The fact that the transmission-wave-length curve of dyed parathion is composite precludes the possibility of interpreting these observations at the present time. 

A similar plot was prepared using the PSA and reference curve oral absorption data for a series of p-blockers (Fig. 19.7), with predicted oral absorption data plotted against observed bioavailability. The differences in metabolic behavior were clearly apparent, as were the largely unquantified effects of P-glycoprotein (P-gp) and other possible transporters [25]. 

The curve is sigmoid as the x axis is now logarithmic. Ensure the middle third of the curve is linear and demonstrate the ED50 as shown. Make this your reference curve for a full agonist and use it to compare with other drugs as described below. 

The constant-/8 equation of state is then e = e +Pjip-p v v, in which the form of the reference curve remains to be specified... 

The reference curve for detonation products may be taken to be the C-J adiabat so that ... 

Measurements of alkali solubles in these coal samples—conventionally accepted as indices of humic acid concentrations—were initially performed by using Kreulen s method (7). However, even when the most stringent precautions were taken to exclude air, this method yielded markedly time-dependent results (presumably owing to oxidation of the coal by the relatively strong alkali solution), and a more satisfactory colorimetric technique (by J. F. Fryer) was therefore employed. This entailed extracting the coal sample with 0.1 N aqueous sodium hydroxide for 16-20 hours in an inert atmosphere and subsequent photoelectric scanning of the extract solutions. Actual humic acid concentrations were then obtained from specially constructed reference curves which related optical density (at an appropriate wavelength) to humic acid contents. The inherent error in this determination is estimated at less than 10%. 

Liggett and Devlin73 reported that a wave-length exponent of 5 appears to be a satisfactory reference curve for a number of refinery samples,... 

FIGURE 13.10 HRR curves of PP-PEP/OMM and PP-PEP/OSEP composites compared to the reference curves. 

For the capsule measurements, glass substrates coated with polyethyleneimine were used on which the PSS-terminated capsules showed adhesion. The capsule force deformation characteristics of individual capsules were obtained by placing a capsule under the colloidal probe and pressing onto it. Special care was taken to press onto the pole of the capsule as described in more detail in [13]. Reference curves on hard substrates were obtained before and after the experiments to determine the inverse optical lever sensitivity (InvoLS) and to derive the absolute deformation of the capsules. In rare cases when the InvoLS was found to change during the measurement, the measured data was discarded. 

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