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Faculty of Science, Medicine and Health - Papers: part A

Energy

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Full-Text Articles in Social and Behavioral Sciences

A Geospatial Assessment Of The Relationship Between Reef Flat Community Calcium Carbonate Production And Wave Energy, S M. Hamylton, A Pescud, J X. Leon, D Callaghan Jan 2013

A Geospatial Assessment Of The Relationship Between Reef Flat Community Calcium Carbonate Production And Wave Energy, S M. Hamylton, A Pescud, J X. Leon, D Callaghan

Faculty of Science, Medicine and Health - Papers: part A

The ability of benthic communities inhabiting coral reefs to produce calcium carbonate underpins the development of reef platforms and associated sedimentary landforms, as well as the fixation of inorganic carbon and buffering of diurnal pH fluctuations in ocean surface waters. Quantification of the relationship between reef flat community calcium carbonate production and wave energy provides an empirical basis for understanding and managing this functionally important process. This study employs geospatial techniques across the reef platform at Lizard Island, Great Barrier Reef, to (1) map the distribution and estimate the total magnitude of reef community carbonate production and (2) empirically ascertain …


Using Biophysics And Dynamic Energy Budget Theory To Investigate How A Large Mammal Responds To Varying Environmental Conditions, J A. Roberts, Salm Kooijman, G C. Coulson, A J. Munn, M R. Kearney Jan 2013

Using Biophysics And Dynamic Energy Budget Theory To Investigate How A Large Mammal Responds To Varying Environmental Conditions, J A. Roberts, Salm Kooijman, G C. Coulson, A J. Munn, M R. Kearney

Faculty of Science, Medicine and Health - Papers: part A

Abstract of paper that presented at SICB 2013 Annual Meeting.


Energy In-Equivalence In Australian Marsupials: Evidence For Disruption Of The Continent's Mammal Assemblage, Or Are Rules Meant To Be Broken?, Adam J. Munn, Craig Dunne, Dennis W.H Muller, Marcus Clauss Jan 2013

Energy In-Equivalence In Australian Marsupials: Evidence For Disruption Of The Continent's Mammal Assemblage, Or Are Rules Meant To Be Broken?, Adam J. Munn, Craig Dunne, Dennis W.H Muller, Marcus Clauss

Faculty of Science, Medicine and Health - Papers: part A

The energy equivalence rule (EER) is a macroecological hypothesis that posits that total population energy use (PEU) should be independent of species body mass, because population densities and energy metabolisms scale with body mass in a directly inverse manner. However, evidence supporting the EER is equivocal, and the use of basal metabolic rate (BMR) in such studies has been questioned; ecologically-relevant indices like field metabolic rate (FMR) are probably more appropriate. In this regard, Australian marsupials present a novel test for the EER because, unlike eutherians, marsupial BMRs and FMRs scale differently with body mass. Based on either FMR or …


On The Utility Of Cardiorespiratory Surrogates Of Whole-Body Energy Expenditure, Sean R. Notley, Hugh H. K Fullagar, Benjamin J. Haberley, Daniel S. Lee, Mayumi Matsuda-Nakamura, Gregory E. Peoples, Nigel A.S Taylor Jan 2013

On The Utility Of Cardiorespiratory Surrogates Of Whole-Body Energy Expenditure, Sean R. Notley, Hugh H. K Fullagar, Benjamin J. Haberley, Daniel S. Lee, Mayumi Matsuda-Nakamura, Gregory E. Peoples, Nigel A.S Taylor

Faculty of Science, Medicine and Health - Papers: part A

Due to environmental and scenario constraints, direct measures of the metabolic demands of work can be difficult or impossible. Fortunately, cardiorespiratory variables respond in a predictable fashion with work rate, and can serve as surrogate indices for approximating energy expenditure (e.g. heart rate and minute ventilation). However, a failure to fully explore the utility of these indices during field-based work is a major limitation within the literature. Thus, this investigation was aimed at evaluating the transferability of predictive equations developed in the laboratory to a series of fire-fighting simulations conducted in the field.


How Well Do Australian Shoppers Understand Energy Terms On Food Labels?, Wendy L. Watson, Kathy Chapman, Lesley King, Bridget Kelly, Clare Hughes, Jimmy Chun Yu Louie, Jennifer Crawford, Timothy P. Gill Jan 2013

How Well Do Australian Shoppers Understand Energy Terms On Food Labels?, Wendy L. Watson, Kathy Chapman, Lesley King, Bridget Kelly, Clare Hughes, Jimmy Chun Yu Louie, Jennifer Crawford, Timothy P. Gill

Faculty of Science, Medicine and Health - Papers: part A

Objective To investigate nutrition literacy among adult grocery buyers regarding energy-related labelling terms on food packaging. Design Qualitative interviews and quantitative surveys to determine shoppers' understanding of energy terms ('energy', 'calories' and 'kilojoules') and how energy terms affect perceptions of healthiness and intentions to purchase breakfast cereals, muesli bars and frozen meals. Setting Individual in-depth interviews and surveys in two metropolitan supermarkets, Sydney, Australia. Subjects Australian adults (interview n 40, survey n 405) aged 18-79 years. Results The relationship between energy and perceived healthiness of food varied by product type: higher energy breakfast cereals were perceived to be healthier, while …


High Muscle Mitochondrial Volume And Aerobic Capacity In A Small Marsupial (Sminthopsis Crassicaudata) Reveals Flexible Links Between Energy-Use Levels In Mammals, Terence Dawson, Koa Webster, Enhua Lee, William A. Buttemer Dec 2012

High Muscle Mitochondrial Volume And Aerobic Capacity In A Small Marsupial (Sminthopsis Crassicaudata) Reveals Flexible Links Between Energy-Use Levels In Mammals, Terence Dawson, Koa Webster, Enhua Lee, William A. Buttemer

Faculty of Science, Medicine and Health - Papers: part A

We investigated the muscle structure–function relationships that underlie the aerobic capacity of an insectivorous, small (~15 g) marsupial, Sminthopsis crassicaudata (Family: Dasyuridae), to obtain further insight into energy use patterns in marsupials relative to those in placentals, their sister clade within the Theria (advanced mammals). Disparate hopping marsupials (Suborder Macropodiformes), a kangaroo (Macropus rufus) and a rat-kangaroo (Bettongia penicillata), show aerobic capabilities as high as those of ‘athletic’ placentals. Equivalent muscle mitochondrial volumes and cardiovascular features support these capabilities. We examined S. crassicaudata to determine whether highly developed aerobic capabilities occur elsewhere in marsupials, rather than being restricted to the …


Hybrid Nanomembranes For High Power And High Energy Density Supercapacitors And Their Yarn Application, Jae Ah Lee, Min-Kyoon Shin, Seon Jeong Kim, Geoffrey Maxwell Spinks, Gordon G. Wallace, Raquel Ovalle-Robles, Marcio D. Lima, Mikhail E. Kozlov, Ray H. Baughman Jan 2012

Hybrid Nanomembranes For High Power And High Energy Density Supercapacitors And Their Yarn Application, Jae Ah Lee, Min-Kyoon Shin, Seon Jeong Kim, Geoffrey Maxwell Spinks, Gordon G. Wallace, Raquel Ovalle-Robles, Marcio D. Lima, Mikhail E. Kozlov, Ray H. Baughman

Faculty of Science, Medicine and Health - Papers: part A

Ultrathin (thicknessnm) electrically conducting membranes can be used as electrodes for sensors, actuators, optical devices, fuel cells, scaffolds for assembling nanoparticles, and separation of biological macromolecules.1-6 Various approaches have been suggested for the fabrication of free-standing nanomembranes based on organic polymers and/or inorganic materials: spin-casting of films,7 layer-by-layer assembly of polyelectrolyte multilayers,8 cross-linking of self-assembled monolayers,9 and assembly of triblock copolymers.10,11 Loading materials such as gold nanoparticles12 or carbon nanotubes13 make membranes robust and electrically conductive. However, these methods are often time-consuming and have some limitations in terms of achievable electrical and electrochemical membrane performance as well as scale-up. Alternative …


Oat Β-Glucan Supplementation Does Not Enhance The Effectiveness Of An Energy-Restricted Diet In Overweight Women, Eleanor J. Beck, Linda C. Tapsell, Marijka J. Batterham, Susan M. Tosh, Xu-Feng Huang Jan 2010

Oat Β-Glucan Supplementation Does Not Enhance The Effectiveness Of An Energy-Restricted Diet In Overweight Women, Eleanor J. Beck, Linda C. Tapsell, Marijka J. Batterham, Susan M. Tosh, Xu-Feng Huang

Faculty of Science, Medicine and Health - Papers: part A

Epidemiological evidence shows an inverse relationship between dietary fibre intake and body weight gain. Oat β-glucan, a soluble fibre alters appetite hormones and subjective satiety in acute meal test studies, but its effects have not been demonstrated with chronic consumption. The present study aimed to test the effects in women of two different doses of oat β-glucan on weight loss and hormones associated with appetite regulation. In a 3-month parallel trial, sixty-six overweight females were randomised into one of three 2 MJ energy-deficit diets: a control and two interventions including 5–6 g or 8–9 g β-glucan. Anthropometric and metabolic variables …


Conjugated Linoleic Acid Versus High-Oleic Acid Sunflower Oil: Effects On Energy Metabolism, Glucose Tolerance, Blood Lipids, Appetite And Body Composition In Regularly Exercising Individuals, Estelle V. Lambert, Julia H. Goedecke, Kerrie Bluett, Kerry Heggie, Amanda Claassen, Dale E. Rae, Sacha West, Jonathan Dugas, Lara Dugas, Shelly Meltzer, Karen E. Charlton, Inge Mohede Jan 2007

Conjugated Linoleic Acid Versus High-Oleic Acid Sunflower Oil: Effects On Energy Metabolism, Glucose Tolerance, Blood Lipids, Appetite And Body Composition In Regularly Exercising Individuals, Estelle V. Lambert, Julia H. Goedecke, Kerrie Bluett, Kerry Heggie, Amanda Claassen, Dale E. Rae, Sacha West, Jonathan Dugas, Lara Dugas, Shelly Meltzer, Karen E. Charlton, Inge Mohede

Faculty of Science, Medicine and Health - Papers: part A

The aim of this study was to measure the effects of 12 weeks of conjugated linoleic acid (CLA) supplementation on body composition, RER, RMR, blood lipid profiles, insulin sensitivity and appetite in exercising, normal-weight persons. In this double-blind, randomised, controlled trial, sixty-two non-obese subjects (twenty-five men, thirty-seven women) received either 3.9 g/d CLA or 3.9 g high-oleic acid sunflower oil for 12 weeks. Prior to and after 12 weeks of supplementation, oral glucose tolerance, blood lipid concentrations, body composition (dual-energy X-ray absorptiometry and computerised tomography scans), RMR, resting and exercising RER and appetite were measured. There were no significant effects …


Minimum Energy As The General Form Of Critical Flow And Maximum Flow Efficiency And For Explaining Variations In River Channel Pattern, He Qing Huang, Howard H. Chang, Gerald Nanson Jan 2004

Minimum Energy As The General Form Of Critical Flow And Maximum Flow Efficiency And For Explaining Variations In River Channel Pattern, He Qing Huang, Howard H. Chang, Gerald Nanson

Faculty of Science, Medicine and Health - Papers: part A

Although the Bélanger-Böss theorem of critical flow has been widely applied in open channel hydraulics, it was derived from the laws governing ideal frictionless flow. This study explores a more general expression of this theorem and examines its applicability to flow with friction and sediment transport. It demonstrates that the theorem can be more generally presented as the principle of minimum energy (PME), with maximum efficiency of energy use and minimum friction or minimum energy dissipation as its equivalents. Critical flow depth under frictionless conditions, the best hydraulic section where friction is introduced, and the most efficient alluvial channel geometry …