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Exchange associative

Although the redox reaction mechanisms of iridium oxide are still not clear, most researchers believe that the proton exchange associated with oxidation states of metal oxides is one of the possible pH sensing mechanisms [41, 87, 100, 105], During electrochemical reactions, oxidation state changes in the hydrated iridium oxide layer are... [Pg.300]

In the case of peptide separation by HPLC, separation modes are combined in series. This approach is called tandem LC. For instance, ion exchange associated with RP is used for peptide separation. Multidimensional protein identification technique (MudPIT) involving use of microcapillary columns (SCX cationic column and RP column) linked in series and eluted into MS is preferred for separation of complex peptide mixtures (Figure 5.4). [Pg.104]

Therefore, based on available literature, the following sorption results were expected (l) as a result of the smectite minerals, the sorption capacity of the red clay would be primarily due to ion exchange associated with the smectites and would be on the order of 0.8 to I.5 mi Hi equivalents per gram (2) also as a result of the smectite minerals, the distribution coefficients for nuclides such as cesium, strontium, barium, and cerium would be between 10 and 100 ml/gm for solution-phase concentrations on the order of 10"3 mg-atom/ml (3) as a result of the hydrous oxides, the distribution coefficients for nuclides such as strontium, barium, and some transition metals would be on the order of 10 ml/gm or greater for solution-phase concentrations on the order of 10 7 mg-atom/ml and less (U) also as a result of the hydrous oxides, the solution-phase pH would strongly influence the distribution coefficients for most nuclides except the alkali metals (5) as a result of both smectites and hydrous oxides being present, the sorption equilibrium data would probably reflect the influence of multiple sorption mechanisms. As discussed below, the experimental results were indeed similar to those which were expected. [Pg.274]

The only example of coherent chemical exchange associated with heavy particle transfer is automerization of cyclobutadiene ... [Pg.319]

Quantifying the Stochastic Salt Exchange Associated with the Barotropic Water Exchange... [Pg.20]

Ying et al. prepared block copolymers of both MM A and HEM A with St [ 186]. Chain extension of pSt-Br (Mn=6400, Mw/Mn=1.31) with MMA or HEM A using the CuCl/bpy catalyst took place at 40 °C, producing block copolymers with Mn= 13,470 and 7400 and Mw/Mn=1.33 and 1.28, respectively [186]. When pMMA-Cl (Mn=15,320, Mw/Mn=1.28) was chain extended with St, the macroinitiator was consumed slowly at 110 °C, as evidenced by the presence of a low molecular weight shoulder in the GPC traces that persisted until >40% monomer conversion. Further monomer conversion resulted in a block copolymer with Mn= 43,850 with Mw/Mn=1.40 [186]. This large increase in the molecular weight distribution is most likely due to slower dynamics of exchange associated with the Cl-based ATRP of St. [Pg.58]

As indicated earlier, vertical exchanges associated with turbulent mixing such as that caused by gravity wave breaking below the homopause are often represented as eddy diffusion. When expressed in terms of number density in an atmosphere following hydrostatic equilibrium conditions, the effective vertical eddy diffusion velocity becomes... [Pg.128]

Figure 14.1 (a) Charge exchange associated with the chemisorption of oxygen at the surface of an n-type semiconductor and the potential distribution across a grain junction,... [Pg.373]

Riciputi LR, Cole DR, Larson P, Mora Cl (1998) A SIMS irrvestigation of chemical and oxygen isotope exchange associated with syntaxial feldspar replacement in the Rico Dome, CO. Geol Soc Am Atmital Mtg Abstr with Progr 30 A272... [Pg.185]

The discussion relating to the metabolism of bacteria in biofilms is of necessity short. Nevertheless it does draw attention to the complexity of bacterial biofilm formation and development, commonly encountered in heat exchangers associated with aqueous industrial systems such as cooling water. It is on account of these... [Pg.233]

A first model for the organization of respiratory nitrite ammonification and direction of proton exchange associated with electron transfer from formate to nitrate in E. coli had been described earlier [126]. The reduction of nitrate to nitrite by the oxidation of formate is linked to the generation of a proton electrochemical potential (Section 3.1.1., discussion on nitrate reductase). Whether the overall architecture of the nitrate reductase complex from E. coli also holds for other nitrite-ammonifying bacteria, has to be investigated. S. deleyianum and... [Pg.94]

Associated 100%, no exchange Associated 100%, rapid exchange Partially associated, rapid exchange Not associated... [Pg.14]

Where s is an index set making reference to the states in the superstructure, Zs is a Boolean variable that takes the value True if a given state exists, Ws is a Boolean variable that takes the value of True is a Heat exchanger associated to that state exists. And the last equation makes reference to the logical relationships among states (tasks) and heat exchangers in order to assure feasible separations. [Pg.62]


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See also in sourсe #XX -- [ Pg.168 ]




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