Factors Influencing Stability

Considerable studies have been done on the effects of the most important chemical and physical factors involved in the degradation of anthocyanins (temperature, light, pH, SO2, metal, sugar, and oxygen) in model systems and food extracts. In addition, anthocyanin concentrations, its chemical structures, and media compositions are fundamental factors influencing stability. 

Factors Influencing Stability of Drugs and Drug Products... 

FACTORS INFLUENCING STABILITY OF DRUGS AND DRUG PRODUCTS... 

J. C. Martin Structural factors influencing stability in compounds of hypervalent carbon, silicon, phosphorus and iodine [5]... 

As alluded to at the beginning of this section, carbocations generated during SNI mechanisms are subject to side reactions that include eliminations and rearrangements. Considering the possibility of these side reactions, one must question the stability of carbo-cationic species. To clarify, if carbocations were inherently stable, they would not be readily subject to additional transformations. Having already addressed the structure of carbocations, attention can now be focused on the factors influencing stability. 

In many systems there is a marked tendency for p-peroxo dimer formation (Scheme 67) but the 1 1 adducts may be stabilized by the use of polar solvents and by bulky groups in the ligand which hinder the dimerization step. They may also be stabilized kinetically by use of low temperatures, however bases with the ability to hydrogen bond will accelerate dimerization653 and a basicity is also important. Detailed discussions of the factors influencing stability are available.644,646... 

The common properties attributed to helper ligands in improving lanthanide-based detection techniques include enhanced stability, sensitivity, and selectivity. We will start with the effects of ancillary ligands on lanthanide photophysics and then explore the impacts of these ligands on sensor properties (Section II). Other factors influencing stability, such as sterics and oxophilicity, will be summarized in Section III. A brief discussion of future applications will follow (Section IV). 

A similar picture arises with other elements The C6o-metaUofullerenes are formed, yet they cannot be obtained in substance. Obviously, further factors influence stability in the generation of endofuUerenes to the effect that smaller species... 

Vitamin Summation formuia Reiative moiecuiar mass Factors influencing stability ... 

In order for the peracetic anion to provide effective low-temperature bleaching, it must remain stable throughout the duration of the wash. Factors influencing stability are the following ... 

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