The present work analyzes the activity in decomposition of H 2O2 using magnetite-immobilized catalase. The support of catalase is a glutaraldehyde-treated magnetite (Fe3O4). The data obtained in the H2O2 decomposition are ...

Catalase enzymes are present in most aerobic forms of life and are responsible for the decomposition of hydrogen peroxide to molecular oxygen and water. Although most catalases contain the iron-protoporphyrin IX prosthetic ...

The polyextremophilic strain Acinetobacter sp. Ver3 isolated from high-altitude Andean lakes exhibits elevated tolerance to UV-B radiation and to pro-oxidants, a feature that has been correlated to its unusually high ...

Andean wetlands are characterized by their extreme environmental conditions such as high UV radiation, elevated heavy metal content and salinity. We present here the first study on UV tolerance and antioxidant defense of ...

Introduction: Intertidal ecosystems are complex environments of great importance for the ecological balance of coastal zones and are vulnerable areas to effects caused by natural stressors of global relevance such as ...

Ralstonia solanacearum is the causative agent of bacterial wilt disease on a wide range of plant species. Besides the numerous bacterial activities required for host invasion, those involved in the adaptation to the plant ...

This paper studies the H2O2 decomposition using supported catalase. The supports are γ-Al2O3, FeCl2-treated γ-Al2O3, glutaraldehyde-treated chitosan and glutaraldehyde-treated cellulose. Catalase/γ-Al2O3 is inactive, but ...

Changes on the oxygen reduction rate induced on aluminium brass by cell-free bacterial cultures of an isolate belonging to the genus Pseudomonas were studied in relation to the bacteria phase of growth and to the surface ...

Fetal ethanol exposure represents a risk factor for sudden infant death syndrome, and the respiratory effects of fetal ethanol exposure promote hypoxic ischemic consequences. This study analyzes central ethanol's effects ...