This study was done on one nurseries affiliated to the center of Najaf governorate during growing season 2021-2022 corresponding 25/11/2021 determination effect Irrigation with magnetically treated water three intensity (0, 750, 1500) gauss and uses Super Micro Nano-fertilizer levels, first level (0 g.L-1), second (1 g.L-1) third (2 g.L-1). On some physiological indicators in pepper (Capsicum a...

Changes in catalase (CAT) activity and in CAT isoform pattern and expression were investigated in developing sunflower (Helianthus annuus L.) seeds during desiccation on the mother plant and after artificial drying on the flowerheads. Seeds regularly desiccated during their development on the mother plant and reached mass maturity at c. 42 d after flowering (DAF). Freshly harvested seeds did no...

Free radicals are all known to damage cell components. The present study was designed to evaluate the free radical generation in the testis and liver and also to determine the testicular and hepatic antioxidant enzyme activities with and without catechin administration in thyroxine induced male Sprague-Dawley rats. The experimental animals were divided into four groups, six on each division. L-...

The present study was undertaken in patients of ovarian malignancy to evaluate the status of oxidative stress and antioxidant defence mechanisms undergoing chemotherapy treatment. Circulating plasma lipid peroxides as malondialdehyde [MDA] and activities of the defensive enzymes (Superoxide Dismutase [SOD] and Catalase [CAT]) were measured. Blood samples were collected before treatment and with...

Stabilization of multimeric enzymes is one of the major challenges in biocatalysis, because dissociation of subunits can inactivate the enzyme. Catalase (CAT; EC 1.11.16) is a homotetramer containing Fe-protoporphyrin IX in its active site. CAT breaks down hydrogen peroxide into water and molecular oxygen. In this study, crosslinked enzyme aggregates of bovine liver CAT (CAT-CLEAs) were prepare...

The immunochemical properties of chromatographically prepared human erythrocuprein differ from those of the chloroform-ethanol-treated protein. Losses of copper also appear to modify its immunochemical reactivity. The result of the immunochemical reactions of rabbit antibody to human erythrocuprein with human liver and brain extracts suggests a common antigen in the two tissues. Human erythrocy...

We studied the role of peroxisomal catalase in chronological aging of the yeastHansenula polymorpha in relation to various growth substrates. Catalase-deficient (cat) cells showed a similar chronological life span (CLS) relative to the wild-type control upon growth on carbon and nitrogen sources that are not oxidized by peroxisomal enzymes. However, when media contained methylamine, which is ox...

We use asexual development of Neurospora crassa as a model system with which to determine the causes of cell differentiation. Air exposure of a mycelial mat induces hyphal adhesion, and adherent hyphae grow aerial hyphae that, in turn, form conidia. Previous work indicated the development of a hyperoxidant state at the start of these morphogenetic transitions and a large increase in catalase ac...

Compartmentalization is a ubiquitous feature of life, with membrane interface that regulates molecular transport and exhibits bioactivities. An artificial enzyme-integrated cascade system can mimic such interactive properties across different length scales for in vitro application. Here, it shown reticulated nanoporous framework nano-caged enzymes presents the first modular macroscale platform ...

The effects of heat on catalase from Staphylococcus aureus lysates were examined. Catalase activity increased with increasing concentrations of potassium phosphate buffer, when heated at temperatures between 50 and 65 degrees C for 10 min. Inactivation of catalase by NaCl during heating was demonstrated. Extended heating of S. aureus cells at 52 degrees C resulted in a slight decrease in catala...