Energy-dissipation in plant mitochondria can be mediated by inner membrane proteins via two processes: redox potential-dissipation or proton electrochemical potential-dissipation. Alternative oxidases (AOx) and the plant uncoupling mitochondrial proteins (PUMP) perform a type of intrinsic and extrinsic regulation of the coupling between respiration and phosphorylation, respectively. Expression ...

Fatty acid b-oxidation occurs in both mitochondria and peroxisomes. Long chain fatty acids are also metabolized by the cytochrome P450 CYP4A v-oxidation enzymes to toxic dicarboxylic acids (DCAs) that serve as substrates for peroxisomal b-oxidation. Synthetic peroxisome proliferators interact with peroxisome proliferator activated receptor a (PPARa) to transcriptionally activate genes that part...

This paper presents a kinetic model of the laccase-aided chlorine dioxide bleaching of bagasse pulp. The kinetic model was based on the rate of reduction of adsorbed organic halogen (AOX). The effects of the laccase enzyme dosage, the mediator 1-hydroxybenzotriazole (HBT) dosage, and the reaction temperature on the AOX content of the bleaching effluent are discussed. Good fits were obtained for...

A laboratory study was carried out to determine the effect of bark boiler ash on AOX concentration in bleach plant effluent. The removal of A O X was found not to be significant at typical daily discharge rates of boiler ash. To remove significant amounts of AOX, extremely large quantities of ash were required. When incremental quantities of ash were added to the bleach plant effluent, an incre...

Germination increases total phenolic compounds (TF) concentration and antioxidant activity (AOx). The characterization quantification of TPC, flavonoids content (TPC), AOx beans (Phaseolus vulgaris) peas (Pisum sativum) sprouts, germinated for ten days was performed. Results showed that the highest TPC both sprouts in 6 7 (685.21 910.69 mg GAE/100 g dry matter) TF varied only beans. pea 512.64 ...

The aim of this study was to explore how the mitochondrial alternative oxidase (AOX) pathway alleviates photoinhibition in chilled tomato (Solanum lycopersicum) seedlings. Chilling induced seedlings despite increases thermal energy dissipation and cyclic electron flow around PSI (CEF-PSI). inhibited function PSII blocked transport at acceptor side, however, it did not affect oxygen-evolving com...

Artichoke wastes after processing represent 60–70% of the raw material and are a potential source inulin polyphenols, bioactive compounds that can be valorized as food ingredients or nutraceutical products. The aim this work was to assess optimize extraction these from artichoke using water water–ethanol mixtures extracting agents. For simultaneous polyphenol achieve high antioxidant activity i...

Candida albicans possesses a cyanide-resistant respiratory pathway mediated by alternative oxidase (AOX), which seems to be encoded by a gene family with two members. Cloning and expression of AOX1a, one of the genes encoding alternative oxidase from C. albicans, has previously been reported [Huh and Kang (1999) J. Bacteriol. 181, 4098-4102]. In the present study we report the isolation of anot...

The electron transport chain (ETC) in the inner mitochondrial membrane of most eukaryotes consists of four large protein complexes, the rotenone-sensitive NADH dehydrogenase (complex I), succinate dehydrogenase (complex II), cytochrome bc1 complex (complex III) and cytochrome c oxidase (complex IV). The electron transport activity of complexes I, III, and IV (the latter two often jointly called...

Alternative oxidase (AOX) protein is located in the inner mitochondrial membrane and is encoded in the nuclear genome being involved in plant response upon a diversity of environmental stresses and also in normal plant growth and development. Here we report the characterization of the AOX gene family of Hypericum perforatum L. Two AOX genes were identified, both with a structure of four exons (...