Using managed aquifer recharge for carbon storage: a feasibility study 7-1115-0268

Managed Aquifer Recharge (MAR) is growing in popularity as a means to store water in aquifers and boost declining aquifer pressure. In the case of coal seam gas (CSG) development in the Surat Basin of Queensland, MAR into the Precipice Sandstone provides a beneficial use of associated water produced as a by-product of gas development. CSG MAR provides a niche opportunity for potentially low cost carbon storage if gaseous CO2 could be dissolved in the MAR water at surface prior to injection. This project proposal is a techno-economic assessment of this process. The evaluation will take a high level look at three critical elements: Volume, timing, and location of CSG MAR; surface plant, material requirements and operability of surface or wellbore dissolution; and assessing the influence of density and pH on MAR. A successful outcome could highlight an opportunity for low cost carbon storage in the Surat Basin of Queensland and could also be applied to other water disposal schemes such as in North America

Hydrogen peroxide signaling via its transformation to a stereospecific alkyl hydroperoxide that escapes reductive inactivation

During systemic inflammation, indoleamine 2,3-dioxygenase 1 (IDO1) becomes expressed in endothelial cells where it uses hydrogen peroxide (H2O2) to oxidize L-tryptophan to the tricyclic hydroperoxide, cis-WOOH, that then relaxes arteries via oxidation of protein kinase G 1\u3b1. Here we show that arterial glutathione peroxidases and peroxiredoxins that rapidly eliminate H2O2, have little impact on relaxation of IDO1-expressing arteries, and that purified IDO1 forms cis-WOOH in the presence of peroxiredoxin 2. cis-WOOH oxidizes protein thiols in a selective and stereospecific manner. Compared with its epimer trans-WOOH and H2O2, cis-WOOH reacts slower with the major arterial forms of glutathione peroxidases and peroxiredoxins while it reacts more readily with its target, protein kinase G 1\u3b1. Our results indicate a paradigm of redox signaling by H2O2 via its enzymatic conversion to an amino acid-derived hydroperoxide that \u2018escapes\u2019 effective reductive inactivation to engage in selective oxidative activation of key target proteins

Mathematics and Art Connections Expressed in Artworks by South African Students

In this chapter, we examine a collection of drawings, and paintings from South African students between the ages of 10 to 17, that provide fresh and original perceptions to some already known topics, but also several unexpected connections between mathematics and art. These works reference classic math-art connections such as: golden ratio, spirals, infinity, and geometric figures; they also contain several personal reflections, unique discoveries and references to ethnomathematical connections within the African cultural heritage. To introduce their pieces and themselves, students shared their own interpretations of their artworks. These commentaries make possible the identification of cognitive, emotional and perceptual patterns. The chapter’s aim is to provide insights into several pragmatic implications of the epistemological and ontological perspectives of mathematics and art connections in learning, and to introduce the MathArtWork method and terminology in the context of creative STEAM education