Reagent primary

A reagent whose purity must be established relative to a primary reagent. 

Combustion Exothermic chemical reaction with oxygen as a primary reagent. 

A secondary antibody labeled with biotin, which is reactive against the species of immunoglobulin used for the primary reagent. 

The primary reagents are combined in an OH medium and the gel, so-formed, held at defined temperatures and pressures for the crystallization period (Figure 16). Gel ageing prior to this crystallization time can be needed. More recent syntheses have shown that high-silica zeolites prepared with a F mineralizer are almost fault-free, unlike those prepared in OH media. 

A perfect separation system would totally divide the two phases. In reality this is never achieved because of deficiencies in the separation system, on the one hand, and of the primary reagents, on the other hand. Invariably, some part of the free antigen behaves identically with the bound fraction, even when there is no antibody present. This misclassifi-cation of free as bound is usually referred to as the diluent or assay... 

Reactions that are strongly diffusion influenced benefit from intraparticle convection. This is because the supply of primary reagents can now be driven by bulk diffusion. Furthermore, reversible reactions of the type A + B 5= C + D will show an additional benefit because the reaction products will be swept from the pzulicle interior by convection, when otherwise their greater accumulation would reverse (and therefore hinder) the local rate of reaction. 

Prediction.s of the benefits then show up in Figs. 28 and 29. Without any convection (zero imposed pressure difference), at a Thiele modulus of 5, the concentration profile inside the network is as shown in Fig. 28. There is a severe depletion of primary reagent into the network, and only the ends see sufficient reagent. With imposed convection (at a X value of 750) for the same Thiele modulus, the effectiveness factor ratio becomes 2.84. The impact of the imposed convection is shown in Fig. 29. The flow generated within the network is quite nonuniform, as the fingers of high concentration show. This... 

Primary reagents and procedures indicated only. CC = Cathodic cleavage. 

Such nucleophilic additions of organolithiums to olefins are of limited use in laboratories. Nevertheless, there are certain categories of alkenes and alkynes that undergo ready addition [15]. A secondary organolithium reagent is easily transformed to the more stable primary reagent via the rapid equilibration [16]. 

Free radical propagation reactions have been studied extensively by ESR. The primary reagent radical is generated in an initiation step, which may be a thermal chemical reaction, photolysis, radiolysis, etc. Reaction to give the secondary radical then follows. ESR data for a very wide variety of radical species have been obtained using this approach. Typical primary radicals are OH, alkoxyl radicals (e.g., Bu O ) and hydrated electrons formed in the reactions shown ... 

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