Acid value terms Links

Rate constants and the products formed in the hydrolysis of Cl Reactive Red 194 (7.76) at 50 °C and pH values in the 10-12 region were determined by high-pressure liquid chromatography. In addition to the normal hydrolysis of the two reactive systems, the imino link between the triazine and benzene nuclei was also hydrolysed [67]. The heterobifunctional copper formazan dye Cl Reactive Blue 221 and two blue anthraquinone monofunctional reactive dyes of the bromamine acid type, namely the aminochlorotriazine Blue 5 and the sulphatoethylsulphone Blue 19, were compared in terms of their sensitivity to... 

The polyketides are a large family of bio synthetically related NPs, some of which have very great pharmaceutical value (polyketide sales total about 10 billion annually, see also Chapter 7). Some antibiotics (erythromycin, monensin, rifamycin), immunosuppressants (rapamycin), antifungal substances (amphotericin), antiparasitic (aver-mectin) and anticancer drugs (doxorubicin) are polyketides. The term polyketide refers to the fact that the basic carbon skeleton is not a simple hydrocarbon chain as in the case of fatty acids but is a series of linked keto groups in sequence (Figure 3.6). The first phase of this pathway, the generation of carbon skeleton diversification. 

The values of 3.3 to 3.6 obtained for the pK pp value to be assigned to the C-25 gel is close to the pK value of 3.31 (I = O.lCNaClO )) published for methoxyacetic acid [58], the weak carboxylic acid that most closely resembles the weak-acid functionality repeated in the cross-linked carboxymethyldextran. It can be concluded, on the basis of this observation, that Eq. (25) provides an adequate resolution of pKjn,. Indeed, the resemblance between pKjpp and pKjp, has led to the use of statistical arguments for the rationali2ation of the absence of nonideality in the a/(l - a) term. The pKjpp values for the highly swollen gel of C-50 at Cs = 0.01 mol dm, on the other hand, increases with increasing a. The extrapolated pK pp values of 3.3-3.6 at a = 0 are consistent with the values of 3.3-3.6 obtained for the C-25 gel over the a range studied. 

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