Lipid peroxidation is the oxidative degradation of lipids. The toxicity correlated with the sonolytic degradation of the polymers. Enzyme levels can also be regulated by changing the rate of enzyme degradation. Photochemical degradation is negligible compared to photocatalytic degradation. Frogs are sensitive to environmental changes, disease, habitat degradation, and pollution. This synthesis is known as the Marker degradation. Haiti also suffers from severe environmental degradation. It is a major driver to global environmental degradation and biodiversity loss. Most fungal lignin degradation involves secreted peroxidases. The susceptibility of a polymer to degradation depends on its structure. Such conditions include anaerobic degradation and composting. Glutamine synthetase uses ammonia produced by nitrate reduction, amino acid degradation, and photorespiration. Unsaturated fatty acids are susceptible to degradation by ozone. Historical research has also found limited evidence of expanding grassland degradation and desertification in Ningxia. PER undergoes progressive phosphorylation and ultimately degradation.