According to Cooper (1988) '... a literature review uses as its database reports of primary or original scholarship, and does not report new primary scholarship itself. The primary reports used in the literature may be verbal, but in the vast majority of cases reports are written documents.
Reactive oxygen species. Reactive oxygen species (ROS) are chemically reactive chemical species containing oxygen. Examples include peroxides, superoxide, hydroxyl radical, and singlet oxygen. In a biological context, ROS are formed as a natural byproduct of the normal metabolism of oxygen and have important roles in cell signaling and homeostasis.
This reaction normally occurs at a very slow rate, but in the presence of catalase, the reaction is greatly accelerated as the substrate, hydrogen peroxide (H 2 O 2), binds to the active site of catalase, producing water and oxygen gas.. Filter this mixture through cheesecloth into a cold graduated cylinder and record the volume in your notebook. Calculate the g plant tissue/ml buffer concentration of your homogenate. This is your enzyme solution. Label it as 100% catalase.