PoMS+cyclohexane

In the first approximation, no precipitation of the fractions within this MW range could be expected in a polymolecular polymer sample. Comparison of the segments A R and. 91) indicates that the increase in the precipitated content from 0.75 to 0.85 results in partial dissolution of the previously precipitated polymer in the system PoMS+cyclohexane-l-oc-tanol due to the decrease in the total polymer concentration. The effect of repeat dissolution is specific for precipitation TT and is not observed in temperature titration. 

In the systems PoMS- -cyclohexane, F MS- -methylcyclohexane, PaMS- -butyl chloride, and PaMS-fpropylene oxide, Cowie and McEwen (1975) also observed a qualitative agreement between the theoretical and experimental curves (UCST and LCS I vs which, however, was achieved by means of arbitrary changes in a number of parameters. In particular, T must remain constant, but its variation with T was observed in experiment. 

The samples were analyzed for trace metals and sulfate as well as for three fractions of particulate organic matter (POM) using sequential extraction with cyclohexane (CYC), dichloromethane (DCM) and acetone (ACE). Factor analysis was used to identify the principal types of emission sources and select source tracers. Using the selected source tracers, models were developed of the form POM = a(V) + b(Pb) + - - -, where a and b are regression coefficients determined from ambient data adjusted to constant dispersion conditions. The models for CYC and ACE together, which constitute 90% of the POM, indicate that 40% (3.0 pg/m ) of the mass was associated with oil-burning, 19% (1.4 pg/m ) was from automotive and related sources and 15% (1.1 pg/m ) was associated with soil-like particles. 

Multivariate source. apportionment models have been developed for two fractions of respirable particulate organic matter which together constitute about 90% of the total organic solvent-extractable mass. The independent variables used for developing the models were trace metals, water-soluble sulfate and meteorological variables. Two of the three POM fractions extracted sequentially with cyclohexane (CYC), dlchloromethane (DCM) and acetone (ACE) were used as individual dependent variables. 

Figure 3.30. Precipitation curves of a PoMS sample with octanol from its cyclohexane. solution (co = 0.0038 g/dl, /o = 4.5 cm) (/) and the restored integral MWl) function (2) (Ramazanov et al., 1983b)...

Figure 7 OM (a, b) and POM images (c, d) of nanofibers of 910a (a, c) and 9-lOb (b, d) grown from cyclohexane (5.0mM), and SEM images of nanofibers of 910b (e, f). (Reproduced from Ref. 16. American Chemical Society, 2007.)...

Microwave (MW) induced dielectric heating has provided a rapid reaction protocol for screening the activity and selectivity of Fe-substituted POMs. Under the conditions explored (summarized in Fig. 21.4), cyclohexane oxygenation occurs with a conversion of up to 3% in 250 min, yielding cyclohexylhydroperoxide (HP), cyclohexanol (A) and cyclohexanone (K) with 90-95% selectivity. " ... 

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