Stabilization against chemical degradation

The second approach involves chemical modification of the protein or peptide by attaching amphiphilic moieties composed of lipophilic alkyl groups and hydrophilic polyethylene glycol units to specific sites on the molecule.In addition to improving stability against enzymatic degradation, this modification is... 

Stabilization of Drug Substances against Chemical Degradation... 

Extensive experimental and theoretical investigations have been carried out on size dependent properties of binary II-VI semiconductor nanocrystals. To increase the stability of colloidal nanocrystals against chemical degradation and to improve the luminescence efficiency from band edge states. 

In addition to the stabilization of pharmaceutical preparations against chemical and physical degradation due to changed environmental conditions within a formulation, certain liquid and semisolid preparations also must be preserved against microbial contamination. 

The stability of membranes against thermomechanical and chemical stresses is an important factor in determining both their short- and long-term performance. Transport and mechanical properties of membranes affect the fuel cell performance, while the lifetime of a fuel cell is mostly dependent on the thermomechanical and chemical stability of the membrane. Thermomechanical and chemical degradation of a membrane will result in a loss of conductivity, as well as mixing of anode and cathode reactant gases. 

Plastics have to be stabilized to withstand chemical and physical stresses during different phases of their lifetime. Stabilizers protecting plastics against particular degradation processes were developed and commercialized by various companies. According to their principal activity mechanisms, polymer stabilizers are conventionally classified as antioxidants, photoantioxidants, photostabilizers, heat stabilizers and... 

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