Purified synergistic effect

Of the several plants with reported allelopathic activity that we at PCRI have examined, none has yet yielded dramatic results. A bioassay-directed approach has yielded modest biological activity which seems to lessen or disappear in pursuing a purified product. This latter accentuates the difficulties of pursuing allelopathic chemicals, the activity of which are due to additive and or synergistic effects of the compounds involved. They must be meticulously studied. 

Compositions of EVA with 5phr of crude or purified CNTs (MWNTs), 2.5 phr of each CNTs and organomodified layered silicate (dimethyl distearyl ammonium) were tested using the cone calorimeter80-81 at 35 kW/m2. It was found that crude CNTs were as effective in the reduction of PHRR as purified CNTs. A synergistic effect for flame retardancy between CNTs and organoclays was observed. Moreover, the residues revealed a reduction in the crack density for the sample with CNTs and organoclay. 

Two other points are evident in Figure 3. Sodium stearoyl 2-lactylate (SSL) is inferior to sucrose esters for carrying soy protein in a no-shortening bread formula. Also, the superior performeuice of the commercial sucrose ester implies synergistic effects in which a mixture of sucrose esters is somewhat more effective as a dough strengthener than is a purified monoester. 

Our own work with the enzyme obtained from Salmonella [49] confirms the synergistic inhibition by AMP and GMP. In addition, an intermediate precursor, AICAR, was found to be as effective as AMP and GMP alone and synergistic with either. With a partially purified preparation, sigmoidal PRPP saturation curves were obtained with an interaction coefficient of 1.8 obtained by the Hill plot. This sigmoid... 

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