3,180 research outputs found
New magnetic and structural results for uniformly spaced, alternatingly spaced, and ladderâlike copper (II) linear chain compounds (invited)
Results of recent synthetic, structural, and magnetic work on exchange coupled copper (II) ions bridged by nonmagnetic ligands are discussed, including the quasiâlinear chain compound bis (dimethyldithiocarbamato) copper (II) in which the copper (II) ions are antiferromagnetically exchange coupled. An unusual correlation exists in the structural and magnetic data for [Cu(dmtc)2]â and other known sulfur bridged coppercompounds. Data are presented for the alternatingly spaced linear chain compounds diâÎŒâchlorobisâ(4âmethylpyridine)copper (II), and a series of dionebisâ(thiosemicarbazato)copper (II) compounds. Exchange coupling constants and alternation parameters were obtained from expressions which were empirically generated from calculations on rings of ten S = 1/2 ions for kT/âJââł0.5 and J<0. Finally, new results for recently discovered spin ladder systems are presented
Using the Red Clover Polyphenol Oxidase Gene to Inhibit Proteolytic Activity in Lucerne
Preserving high quality forage in cool humid regions of agricultural production remains a challenge due to potentially high levels of protein degradation during ensiling. Red clover is an exception maintaining its high protein levels during ensiling. Decreased proteolytic activity in red clover is due to polyphenol oxidase (PPO) activity and appropriate o-diphenol substrates (Jones et al., 1995, Sullivan et al., 2004). This work highlights potential strategies for utilising PPO as a means of decreasing proteolytic degradation during the ensiling of lucerne and other forages
Polyphenol Oxidase Activity and \u3ci\u3ein vitro\u3c/i\u3e Proteolytic Inhibition in Grasses
Harvesting and storing high quality forage in the cool humid regions remains a challenge due to the potential for protein degradation during ensiling. Red clover is an exception as high protein levels are maintained during ensiling. Decreased proteolytic activity in red clover is due to polyphenol oxidase (PPO) activity and appropriate o-diphenol substrates (Jones et al., 1995, Sullivan et al., 2004). This project was undertaken to determine if PPO activity is present in a range of grasses and the potential role in proteolytic inhibition in the presence of the o-diphenol caffeic acid
Polyphenol Oxidase Activity and \u3cem\u3ein Vitro\u3c/em\u3e Proteolytic Inhibition in Grasses
Harvesting and storing high quality forage in the cool humid regions remains a challenge due to the potential for protein degradation during ensiling. Red clover is an exception as high protein levels are maintained during ensiling. Decreased proteolytic activity in red clover is due to polyphenol oxidase (PPO) activity and appropriate o-diphenol substrates (Jones et al., 1995, Sullivan et al., 2004). This project was undertaken to determine if PPO activity is present in a range of grasses and the potential role in proteolytic inhibition in the presence of the o-diphenol caffeic acid
Re-positioning SoTL toward the T-shaped Community
Amongst a range of changes that have taken place within tertiary education, perhaps the most revolutionary has been a shift to student-centred approaches focused on life-long learning. Accompanying this approach to holistic higher education (HE) has been a growing interest in, and understanding of, the Scholarship of Teaching and Learning (SoTL). SoTL has, at its core, a deep concern with student learning and is therefore well-aligned with higher educationâs renewed focus on its students. In this conceptual paper, we examine the impact of the T-shaped person which many tertiary institutions are operationalizing to inform and connect the development of studentsâ deep disciplinary knowledge with non-academic and employment readiness skills (such as communication, problem-solving, teamwork, and critical thinking). Importantly, we argue for a re-positioning of SoTL to complement and support this model, with SoTL as both the fulcrum and the fluid, multiple threads of discourse that are intricately entwined around the structure of the T-shaped model. We encourage our colleagues to strive to be T-shaped practitioners and we cast a vision of a T-shaped community. Here, all stakeholders within HE connect both their academic knowledge and holistic skills in collaborative ways to produce learners who flourish in modern society. The SoTL community plays a pivotal role in achieving this vision and is well-positioned to expand the current notion of SoTL toward a more holistic, interconnected, central role in HE
X-ray photoemission spectroscopy determination of the InN/yttria stabilized cubic-zirconia valence band offset
The valence band offset of wurtzite InN(0001)/yttria stabilized cubic-zirconia (YSZ)(111) heterojunctions is determined by x-ray photoemission spectroscopy to be 1.19±0.17 eV giving a conduction band offset of 3.06±0.20 eV. Consequently, a type-I heterojunction forms between InN and YSZ in the straddling arrangement. The low lattice mismatch and high band offsets suggest potential for use of YSZ as a gate dielectric in high-frequency InN-based electronic devices
Identification of Trace Element-Containing Proteins in Genomic Databases
Development of bioinformatics tools provided researchers with the ability to identify full sets of trace elementâcontaining proteins in organisms for which complete genomic sequences are available. Recently, independent bioinformatics methods were used to identify all, or almost all, genes encoding selenocysteine-containing proteins in human, mouse, and Drosophila genomes, characterizing entire selenoproteomes in these organisms. It also should be possible to search for entire sets of other trace elementâassociated proteins, such as metal-containing proteins, although methods for their identification are still in development
Casimir energy of a massive field in a genus-1 surface
We review the definition of the Casimir energy steming naturally from the
concept of functional determinant through the zeta function prescription. This
is done by considering the theory at finite temperature and by defining then
the Casimir energy as its energy in the limit . The ambiguity in the
coefficient is understood to be a result of the necessary
renormalization of the free energy of the system. Then, as an exact, explicit
example never calculated before, the Casimir energy for a massive scalar field
living in a general -dimensional toroidal spacetime (i.e., a general
surface of genus one) with flat spatial geometry ---parametrized by the
corresponding Teichm\"uller parameters--- and its precise dependence on these
parameters and on the mass of the field is obtained under the form of an
analytic function.Comment: Changes everywhere: title, abstract, contents and figures. Version to
appear in Physics Letters
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