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Rhinovirus impairs physiological and immunological lung development and causes exacerbation of allergic airways disease. Rhinovirus (RV) infections account for around 90 per cent of asthma exacerbations, yet the mechanisms behind this are unknown. This project will use mouse models to study the effects of early life RV infection and allergic sensitisation on respiratory and immunological development, with the expectation that early life RV infection disrupts anitgen presenting cell function.
The health effects of electronic cigarette use are virtually unknown. They have only recently been introduced into widespread use, and as such their effects on human health will not be known for many years. We will use our expertise in exposure models and health outcome measurement to provide timely hard-data on their potential to impact health – data that are urgently required to guide policy makers in this area.
Sugar and water handling by honeyeaters and sunbirds. Honeyeaters are the major vertebrate pollinators in Australia, playing a vital role in maintenance of healthy ecosystems. These birds are faced with extreme physiological challenges due to their diet, ingesting 2-5 times their body mass in nectar to obtain their daily sugar requirement. Nectarivores are, consequently, masters at processing and assimilating sugars and water; comparative physiology of these charismatic birds will provide deep u ....Sugar and water handling by honeyeaters and sunbirds. Honeyeaters are the major vertebrate pollinators in Australia, playing a vital role in maintenance of healthy ecosystems. These birds are faced with extreme physiological challenges due to their diet, ingesting 2-5 times their body mass in nectar to obtain their daily sugar requirement. Nectarivores are, consequently, masters at processing and assimilating sugars and water; comparative physiology of these charismatic birds will provide deep understanding of sugar and water handling mechanisms. Understanding gut and renal physiology and morphology contributes to the broad base of knowledge required to address pathological and clinical conditions in man, and will enhance our ability to predict effects of environmental change on these birds.Read moreRead less
Postviral Wheezing In Childhood: Disregulation Of Airway Tone?
Funder
National Health and Medical Research Council
Funding Amount
$577,040.00
Summary
Asthma is a very common childhood condition that is becoming increasingly more common. Wheezing is common in infants and young children following viral infections and is often thought of as the first manifestation of asthma. However, many children and infants who wheeze with viral infections appear to grow out of asthma in their teenage years. Asthma that persists into adult life is usually associated with allergies to common environmental allergens, such as house dust mite and grass pollens. Ho ....Asthma is a very common childhood condition that is becoming increasingly more common. Wheezing is common in infants and young children following viral infections and is often thought of as the first manifestation of asthma. However, many children and infants who wheeze with viral infections appear to grow out of asthma in their teenage years. Asthma that persists into adult life is usually associated with allergies to common environmental allergens, such as house dust mite and grass pollens. However, many infants who wheeze with viral infections, especially in the first year of life, do not develop allergies in later life, raising the possibility that they did not have the same type of asthma as those whose symptoms persist. This project will study the effects of viral infections on lung function to determine whether particular types of virus can have detrimental effects of lung function lasting for years. We will also examine whether the age at which the infection occurs and the severity of the infection influence the long-term outcome. The project involves studying infants during the recovery phase of respiratory viral infections, older children years after documented infections and experimental animal models that have been infected under controlled conditions. By determining whether respiratory viral infections can have long-term effects on lung function that can mimic asthma, we will advance our understanding of how asthma develops. In addition, specific treatment and preventative strategies could then be developed to prevent these long-term abnormalities, instead of relying on asthma medication (especially inhaled corticosteroids) as is the current practice. Preventative strategies could include encouraging the development of specific vaccines.Read moreRead less
Domestic air quality: towards the setting of guidelines. Air quality standards have been developed to protect human health. Although people spend most of their time indoors there are no standards and only a few guidelines for indoor air pollution (IAP). The aim of this study is to investigate the levels of IAP that may worsen asthma in children. Childhood asthma will be used as a health indicator due to its high prevalence, cost to the healthcare system and implications for respiratory morbidity ....Domestic air quality: towards the setting of guidelines. Air quality standards have been developed to protect human health. Although people spend most of their time indoors there are no standards and only a few guidelines for indoor air pollution (IAP). The aim of this study is to investigate the levels of IAP that may worsen asthma in children. Childhood asthma will be used as a health indicator due to its high prevalence, cost to the healthcare system and implications for respiratory morbidity in adult life. We expect to identify levels of IAP that will represent a health risk as well as the factors that may contribute to increased IAP in homes.Read moreRead less
Modelling and Measurement of Flow-Structure Dynamics in the Human Upper Airway. Sleep disruption due to the common and disabling conditions of snoring and obstruction of the human upper airway can result in chronic fatigue, lost work and accidents caused by daytime drowsiness. To date the behaviour of the upper airway has not been adequately studied in terms able to reveal the mechanical causes of these conditions. This deficiency is addressed through the development and use of simulation tools ....Modelling and Measurement of Flow-Structure Dynamics in the Human Upper Airway. Sleep disruption due to the common and disabling conditions of snoring and obstruction of the human upper airway can result in chronic fatigue, lost work and accidents caused by daytime drowsiness. To date the behaviour of the upper airway has not been adequately studied in terms able to reveal the mechanical causes of these conditions. This deficiency is addressed through the development and use of simulation tools and measurement techniques that will elucidate the flow-structure dynamics leading to new diagnostic and improved treatment methods. Simulating the effect of treatment on any individual will permit it to be chosen to maximise its efficacy for a problem that costs the nation an estimated $2 Billion per year in lost productivity.Read moreRead less
Defining the direct effects of exercise on arterial adaptation. Understanding the mechanisms responsible for the beneficial effects of exercise is fundamental to optimising the design of preventative programs aimed at healthy ageing. These experiments will contribute to our understanding of the direct effects of changes in blood flow and pressure during exercise on vascular adaptations in humans.
The comparative physiology of oxygen delivery to the kidney. The kidney is in danger of hyperoxia because the kidney receives so much blood relative to its mass. It is proposed that shunting oxygen between arteries and veins substantially mitigates the risk of hyperoxia, but under certain circumstances shunting substantially increases the risk of kidney hypoxia. Using a combination of synchrotron and histological imaging, This project will carefully define the three-dimensional vasculature of th ....The comparative physiology of oxygen delivery to the kidney. The kidney is in danger of hyperoxia because the kidney receives so much blood relative to its mass. It is proposed that shunting oxygen between arteries and veins substantially mitigates the risk of hyperoxia, but under certain circumstances shunting substantially increases the risk of kidney hypoxia. Using a combination of synchrotron and histological imaging, This project will carefully define the three-dimensional vasculature of the renal cortex in several different species and interpret its functional significance using computational modeling. The outcome of this project will be a new understanding in the comparative physiology of oxygen transport and shunting in the kidney.Read moreRead less
Physiology of oxygen transport in the mammalian kidney. This project aims to improve understanding of oxygen regulation in renal tissue and knowledge of the physiology of the kidney. The mammalian kidney receives more oxygen than it uses or needs, and yet renal tissue is commonly found to be hypoxic. This project proposes that oxygen transport to the renal tissue is limited by blood vessel surface area. The project expects to generate anatomical data currently missing from the renal physiology c ....Physiology of oxygen transport in the mammalian kidney. This project aims to improve understanding of oxygen regulation in renal tissue and knowledge of the physiology of the kidney. The mammalian kidney receives more oxygen than it uses or needs, and yet renal tissue is commonly found to be hypoxic. This project proposes that oxygen transport to the renal tissue is limited by blood vessel surface area. The project expects to generate anatomical data currently missing from the renal physiology community, and potentially change the accepted story of oxygen homeostasis in the kidney. This will provide significant benefits, such as the provision of the foundational physiological science behind a determinant of kidney health and its flow-on impact to quality of life.Read moreRead less
The energetic basis to seed longevity and storage. The energetic basis to seed longevity and storage. This project aims to quantify patterns of metabolic rate in Australian native seeds to research seed ecology, dormancy, germination, longevity and persistence in natural and artificial seed banks. The project aims to optimise and refine current respirometry technology for use with native seeds, understand the allometric relationship and patterns with seed diversity, and apply this knowledge to b ....The energetic basis to seed longevity and storage. The energetic basis to seed longevity and storage. This project aims to quantify patterns of metabolic rate in Australian native seeds to research seed ecology, dormancy, germination, longevity and persistence in natural and artificial seed banks. The project aims to optimise and refine current respirometry technology for use with native seeds, understand the allometric relationship and patterns with seed diversity, and apply this knowledge to benefit restoration and conservation seed banks. By interpreting the energetics of seeds in a phylogenetic context, this project will develop an experimental protocol to predict the physiology and longevity, and test the viability of seeds in storage. Anticipated outcomes are improved efficiency of seed bank storage, conservation and restoration efforts.Read moreRead less