Enhancer derivatives

Ammonium glycyrrhizinate [53956-04-0] (AG), C42H N02g, is a flavor enhancer derived from Hcorice root. It is approximately 50 times sweeter than sucrose and is often used to enhance sweetness in a wide variety of food products (56). Maltol [118-71 -8] C H O, and ethyl maltol [4940-11-8], CyHgO, are used as flavor enhancers in products such as cake mixes, confections, cookies, ice cream, fmit juices, puddings, and beverages (57). 

Taavitsamen, V. M. (2009). Denoising and signal-to-noise ratio enhancement Derivatives. In "Comprehensive Chemometrics", (S. D. Brown, R. Tauler, and B. Walczak, Eds), Vol. 2, pp. 57-66. Elsevier, Amsterdam. 

Other cyclopropyl conjunctive reagents are also employed in such annulations including the parent (see Eq. 18). The closest in producing a similar structural change is the thio analogue. Some rate enhancement derives from the sulfur activation. As an annulation onto ketones, a sequence employing 37a accomplishes the same structural change (Eq. 87 a) when the annulated product 73 is hydrolyzed (TiCfj,... 

The noise, both AM and FM, of microwave oscillators used in ESR bridges is equal to or worse than in early years. There has been little improvement in tube oscillators and solid state oscillators have somewhat worse noise in our experience. It is important to recognize that both oscillator AM and FM noise are enhanced in a microwave bridge of the reference arm type. Wilmshurst [12] discusses AM noise enhancement, deriving the following equation for the noise voltage... 

The Separation of the Enantiomers of Propranolol, Metroprolol and Atenolol As Fluorescent Enhanced Derivatives on Cellulose Tris(3,5-dimethylphenylcarbamate) Coated on Silica Gel... 

It is now well accepted that an enhancement of the electromagnetic field represents a dominant contribution towards the SERS effect [32-34], Such an enhancement derives... 

Healy, B., Field, D., O Connor, P.M., et al. (2013). Intensive mutagenesis of the nisin hinge leads to the rational design of enhanced derivatives. PImS One 8, e79563. 

Other related coding languages are derived from enhancements of SMILES (XSMILES, SMARTS, SMIRKS, STRAPS, CHUCKLES, CHORTLES, CHARTS [22]). Each of them was designed to represent special molecular structures or to allow particular applications (polymers, mixtures, reactions, or database-handling). 

The selection of a time increment dependent on parameter a (i.e. carrying out Taylor series expansion at a level between successive time steps of n and n+Y) enhances the flexibility of the temporal discretizations by allowing the introduction of various amounts of smoothing in different problems. The first-order time derivatives are found from the governing equations as... 

Apart from the thoroughly studied aqueous Diels-Alder reaction, a limited number of other transformations have been reported to benefit considerably from the use of water. These include the aldol condensation , the benzoin condensation , the Baylis-Hillman reaction (tertiary-amine catalysed coupling of aldehydes with acrylic acid derivatives) and pericyclic reactions like the 1,3-dipolar cycloaddition and the Qaisen rearrangement (see below). These reactions have one thing in common a negative volume of activation. This observation has tempted many authors to propose hydrophobic effects as primary cause of ftie observed rate enhancements. 

In contrast to SDS, CTAB and C12E7, CufDSjz micelles catalyse the Diels-Alder reaction between 1 and 2 with enzyme-like efficiency, leading to rate enhancements up to 1.8-10 compared to the reaction in acetonitrile. This results primarily from the essentially complete complexation off to the copper ions at the micellar surface. Comparison of the partition coefficients of 2 over the water phase and the micellar pseudophase, as derived from kinetic analysis using the pseudophase model, reveals a higher affinity of 2 for Cu(DS)2 than for SDS and CTAB. The inhibitory effect resulting from spatial separation of la-g and 2 is likely to be at least less pronoimced for Cu(DS)2 than for the other surfactants. 

As is broadly true for aromatic compounds, the a- or benzylic position of alkyl substituents exhibits special reactivity. This includes susceptibility to radical reactions, because of the. stabilization provided the radical intermediates. In indole derivatives, the reactivity of a-substituents towards nucleophilic substitution is greatly enhanced by participation of the indole nitrogen. This effect is strongest at C3, but is also present at C2 and to some extent in the carbocyclic ring. The effect is enhanced by N-deprotonation. 

In agreement with the theory of polarized radicals, the presence of substituents on heteroaromatic free radicals can slightly affect their polarity. Both 4- and 5-substituted thiazol-2-yl radicals have been generated in aromatic solvents by thermal decomposition of the diazoamino derivative resulting from the reaction of isoamyl nitrite on the corresponding 2-aminothiazole (250,416-418). Introduction in 5-position of electron-withdrawing substituents slightly enhances the electrophilic character of thiazol-2-yl radicals (Table 1-57). 

As will be demonstrated in Chapter 4, an isotherm which is reversible and of Type II is quite compatible with the presence of micropores. If such pores are present, the isotherm will be distorted in the low-pressure region, the value of c will be greatly enhanced, and the specific surface derived by the BET procedure will be erroneously high. In particular, a BET specific surface in excess of - 500m g" should be taken as a warning that... 

The equilibrium problem for a plate is formulated as some variational inequality. In this case equations (3.92)-(3.94) hold, generally speaking, only in the distribution sense. Alongside (3.95), other boundary conditions hold on the boundary F the form of these conditions is clarified in Section 3.3.3. To derive them, we require the existence of a smooth solution to the variational inequality in question. On the other hand, if we assume that a solution to (3.92)-(3.94) is sufficiently smooth, then the variational inequality is a consequence of equations (3.92)-(3.94) and the initial and boundary conditions. All these questions are discussed in Section 3.3.3. In Section 3.3.2 we prove an existence theorem for a solution to the variational equation and in Section 3.3.4 we establish some enhanced regularity properties for the solution near F. ... 

Fig. 28. Traditional duv-resist design using derivatives of polyhydroxystyrene. Monomer (a) contributes hydrophilic character to the polymer, and its acidic phenol group enhances aqueous base solubiUty monomer (b) provides acid-labile pendent groups.

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