Parallel reactions mixture fraction

Hence, parallel reactions will be sensitive to mixing for values of the mean mixture fraction in the range fmax < < 1 for which 0 < Yff f <... 

Fluorous solid-phase extractions are readily conducted in parallel (or serial), with or without automation. All reaction mixtures are processed identically and behave in substantially the same way, even though all the products are different. Careful fractionation and analysis are not required there is one organic fraction and one fluorous fraction. Because the separation is so easy, loading levels can be high. Loose fluorous silica gel and cartridges suitable for solid-phase extraction have recently been commercialized under the trademark FluoroF/dj/i by Fluorous Technologies, Inc. ... 

Biochemical analyses can be performed in parallel with or instead of morphological studies. At various time points during the course of in vitro disassembly, aliquots of the reaction mixture should be separated into supernatant and pellet fractions by sedimentation at 12,000 g and proteins subjected to SDS-PAGE and immunoblot analysis. An extract of stage 14 Drosophila oocytes contains only lamin Dm i, (Smith and Fisher, 1989 see also Lin and Fisher, 1990 Mans et at., 1995). Purified Drosophila nuclei contain lamins Dmi and Dm2 (Smith et al, 1987 see also Lin and Fisher, 1990 Maus et al, 1995). Lamin Dmmit migrates with a gel mobility intermediate to lamins Dm, and Dm2 (Fig. 4). 

That is, the ordered structure of the cholesteric mesophase affects the formation of the traTO-adduct advantageously. Furthermore, the trans/cis product ratio depends significantly on the initial acenaphthylene concentration. In isotropic solutions, the dimerization of singlet-excited acenaphthylene molecules is known to yield exclusively the czv-adduct, whereas a mixture of cis- and traTO-adducts results from triplet-excited solute molecules. The lowering of cu-adduct production in the mesophase has been attributed to the enhanced efficiency of the triplet reaction in comparison with the singlet reaction, as shown by quantum yield measurements [732]. The increase in triplet reaction efficiencies has been ascribed to the increase in the fraction of acenaphthylene-acenaphthylene collisions which have coplanar or parallel-plane orientations with respect to the surrounding solvent molecules, and not to the increase in the total number of collisions per unit time [732]. See references [713, 732, 733] for a more detailed discussion of this photodimerization reaction. 

When the reaction is carried out in ether solution, it was found that, whereas addition of acetic acid to a solution of pyrazolenine propionate led to a mixture of propionate and acetate esters in the products, the addition of large amounts of the more strongly nucleophilic methanol gave only a barely detectable fraction of methyl ethers. Such behaviour closely parallels that observed by White in the rearrangement of nitrosoamides and may be accounted for in terms of a similar mechanism, if it is assumed that the initial photolysis of the pyrazolenine gives a diazoalkane. 

Reported in Fig. 4 are the TAP results in multipulse mode with monitoring of the maleic anhydride (MA) formation from n-pemane and feeding a 1 5 mixture of n-pcntane/02 (A) or of only pentane (B). It is shown that MA formation decreases considerably with the number of pulses in both aerobic or anaerobic conditions. The decrease is more dramatic in the absence of O. Parallelely, n-pentane conversion also decreases. If after these experiments, pulses of only C>2 are fed to the catalyst and CO formation is monitored (Fig. 5), it is found that a large fraction of strongly adsorbed intermediates remain on the catalyst surface after interaction with feedstocks with or without O2 together writh alkane. When O2 is fed to the catalyst later, CO2 forms by reaction of O2 with surface C-coniaining molecules. The only other product detected, besides CO, is furan. 

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