PCC , Tabl

Polymers prepared by current industrial processes have been compared with this new process in the dispersion of GCC and PCCs (Tables 1-3). These current processes use as chain transfer agent inorganic salts processes A and B) or alcohol process D). 

Furans appear readily to undergo a variety of oxidation reactions with PCC (Table... 

Dihydropyrans need only a moderate excess of PCC to be converted into unsaturated lactones (Table 8, entry 6)." However, the oxidation of normal allylic and benzylic C— H groups requires a large excess of PCC (Table 8, entries 7 to 9). " The amount of PCC needed is lower if benzene" " or DMSO are used as solvents for oxidation, but the reactions still need to be heated to obtain reasonable conversion. 

Factor IX Replacement Hemophilia B therapy may include recombinant (produced via transfection of mammalian cells with the human factor IX gene) or plasma-derived (concentrate from pooled plasma) factor IX (see Table 64-2). Guidelines for choosing the factor-concentrate formulation for hemophilia B are similar to the guidelines for hemophilia A. However, older-generation factor IX concentrates containing other vitamin K-dependent proteins (e.g., factors II, VII, and IX), called prothrombin complex concentrates (PCCs), have been associated with thrombogenic side effects. Consequently, these products are not first-line treatment for hemophilia B.11... 

As seen in the table, less than 3% of the PRCC violated two or more of the rules, which is slightly less than the approximately 3% of cases found in the entire PCC. Thus,... 

Table 1 Fine PCC 95% < 2 microns), slurry solids 75%, dispersant 0.80%, as polymer solids/dry powder)...

The influence of the molecular weight of the dispersant on the quality of the slurry dispersion has been studied on both PCCs. The dispersants ranged in molecular weight from 2000 to 5800 (according to our internal standards) made by the process C. Results are summarised in Tables 4 and 5, below. 

Table 6 Effect of monomer composition on fine PCC dispersion ...

TABLE 1 Comparison of the 5-Year Costs Associated with the PCC Biofilter and Catalytic Oxidizers... 

IEEE 519 also provides guidelines for maximum voltage distortion at the PCC (see Table 4.12). Limiting the voltage distortion at the PCC is the concern of the utility. It can be expected that as long as a facility s harmonic current contribution is within the IEEE 519 limits the voltage distortion at the PCC will also be within the specified limits. 

Note Isc = maximum short-circuit current at PCC IL = maximum fundamental frequency demand load current at PCC (average current of the maximum demand for the preceding 12 months) h = individual harmonic order THD = total harmonic distortion, based on the maximum demand load current. The table applies to odd harmonics even harmonics are limited to 25% of the odd harmonic limits shown above. 

In all of the examples given, a temperature of 25°C and 1 atm total pressure are assumed. The task will be to calculate the concentration of all of the carbonic acid system components, pH, At, CO2, Pcc>2< Ca2+ concentration, ionic strength, and the appropriate ion activity coefficients. The values of the thermodynamic constants used in these calculations were calculated from appropriate equations in Chapter 1. Concentrations are on the molal scale, and results for each case are summarized in Table 2.4. 

The UMCDF permit refers to this not as a WCL but as a permit compliance concentration (PCC). The PCCs at UMCDF are slightly lower than the WCLs used at other chemical agent disposal facilities and are discussed later in this chapter and listed in Table 3-8. 

The chroniium(VI) oxide-dipyridine complex also has beoi found to cause oxidative rearrangement of tertiary allylic alcohols to a,3-epoxy aldehydes and small amounts of a,3-unsaturated aldehydes (equation 6 and Table 3). This is potentially useful as a homologation sequence since the starting materials are readily available from vinyl metal addition to ketones. Use of pyridinium chlorochromate (PCC) for this transformation gives mosdy a,3 unsaturated aldehydes. 

In a similar fiashion to the Collins reagent, PCC will also induce oxidative rearrangement of tertiary allylic alcohols (Table S). PCC, and several other chromium oxidants, will also cause tertiary cyclopropyl alcohols to rearrange to give 3,y-unsaturated carbonyl compounds (equation 8). ... 

Table 5 Rearrangements of Tertiary Allylic Alcohols with PCC...

PCC can be modified to show selectivity for the oxidation of allylic alcohols in stnoidal systems. A solution of PCC in dichloromethane with 2% pyridine at ca. 2 C was found to be an effective and selective oxidant (Table 6). In contrast to chromate oxidations of saturated alcohols in rigid systems. Parish and coworkm found that quasiequatorial allylic alcdiols woe oxidized faster than axial ones. Similar xoperties woe also found for solutions of PCC and 3,3-dimethyIpyrazole (2%) in dichloromethane. In addition, Parish and coworkos also eiamined sevoal otho aromatic amines for the ability to promote allylic selectivity. 2,2 -Bipyridine, pyrazine, pyridazine, s-lriazine and 2,4,6-tri diaiy yridine all had S( ne effect, but their cacy tqtpeared to be sutetrate dependent Most recoitly the combination of PCC... 

Phenyloxiranes are cleaved by PCC. The phenyl group appears to be essential for carbon-carbon bond scission (Table 8, entry 3). ... 

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