Localizando a criticidade na política: a contínua luta por justiça social na agenda da educação física escolar / Locating criticality in policy: the ongoing struggle for a social justice agenda in school physical education / Ubicando la criticidad en la política: la continua lucha por justícia social en la agenda de la educación física escolar

Há um sentimento de promessa não realizada quando se analisa o progresso do projeto crítico da Educação Física desde a virada da segunda década do século XXI. Estudos de qualidade continuam a emergir em torno da pedagogia crítica da Educação Física, evidenciando o prolongado comprometimento com sua promessa de fornecer aos aprendizes recursos pessoais e intelectuais que são necessários na orientação de produtivos futuros sadios num mundo cada mais complexo. Neste artigo nós discutimos destacados exemplos de investigações contemporâneas que demonstram as contínuas lutas em contextos práticos e revisita barreiras que continuam a restringir as aspirações dos estudos críticos. Focando na Educação Física como uma prática cultural e curricular nas escolas australianas, nós damos primazia aos modos pelos quais políticas diretivas podem ser melhor mobilizadas para capacitar a agenda crítica

There is a sense of unfulfilled promise as one reflects on the progress of the critical project in Physical Education (PE) at the turn of the second decade of the 21st century. Quality scholarship continues to emerge around critical pedagogy in PE, evidencing sustained commitment to its promise to provide learners with personal and intellectual resources needed in navigating productive healthy futures in an increasingly complex world. In this paper we discuss select examples of contemporary research to demonstrate ongoing struggles in practice-based contexts and revisit barriers that continue to restrict the translational aspirations of critical scholars. Focusing on PE as a cultural and curriculum practice in Australian schools, we give primacy to the ways in which policy directives might be better mobilised to enable the critical agenda

Hay un sentimiento de promesa no cumplida cuando se analiza el progreso del proyecto crítico de la Educación Física desde el giro de la segunda década del siglo XXI. Estudios de calidad continúan a emerger en torno a la pedagogía crítica de la Educación Física, evidenciando el prolongado compromiso con su promesa de ofrecer a los aprendices recursos personales e intelectuales que son necesarios en la orientación de productivos futuros saludables en un mundo cada vez más complejo. En ese artículo discutimos destacados ejemplos de investigaciones contemporáneas que demuestran las continuas luchas en contextos prácticos y revisita barreras que continúan restringiendo las aspiraciones de los discursos críticos. Con foco en la Educación Física como una práctica cultural y curricular en las escuelas australianas, priorizamos los modos por los cuales políticas directivas pueden ser mejor movilizadas para capacitar la agenda crítica

Validation of the nickel biotic ligand model for locally relevant species in Australian freshwaters.

Australian freshwaters have relatively low water hardness and different calcium (Ca) to magnesium (Mg) ratios compared with those in Europe. The hardness values of a substantial proportion of Australian freshwaters fall below the application boundary of the existing European nickel biotic ligand models (Ni BLMs) of 2 mg Ca/L. Toxicity testing was undertaken using Hydra viridissima to assess the predictive ability of the existing Ni BLM for this species in extremely soft waters. This testing revealed an increased competitive effect of Ca and Mg with Ni for binding to the biotic ligand in soft water (<10 mg CaCO3 /L) than at higher water hardness. Modifications were made to the Ni BLM by increasing the binding constants for Ca and Mg at the biotic ligand to account for softer waters encountered in Australia and the more important competitive effect of Ca and Mg on Ni toxicity. To validate the modified Ni BLM, ecotoxicity testing was performed on 5 Australian test species in 5 different natural Australian waters. Overall, no single water chemistry parameter was able to indicate the trends in toxicity to all of the test species. The modified Ni BLMs were able to predict the toxicity of Ni to the test species in the validation studies in natural waters better than the existing Ni BLMs. The present study suggests that the overarching mechanisms defining Ni bioavailability to freshwater species are globally similar and that Ni BLMs can be used in all freshwater systems with minor modifications. Environ Toxicol Chem 2018;37:2566-2574. © 2018 SETAC.