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Gloria Comadira, Brwa Rasool, Barbara Karpinska, Jenny Morris, Susan R Verrall, Peter E Hedley, Christine H Foyer, Robert D Hancock
Agricultural nitrous oxide (N2O) pollution resulting from the use of synthetic fertilizers represents a significant contribution to anthropogenic greenhouse gas emissions, providing a rationale for reduced use of nitrogen (N) fertilizers. Nitrogen limitation results in extensive systems rebalancing that remodels metabolism and defence processes. To analyse the regulation underpinning these responses, barley (Horedeum vulgare) seedlings were grown for 7 d under N-deficient conditions until net photosynthesis was 50% lower than in N-replete controls...
June 2015: Journal of Experimental Botany
Gregory Comadira, Lucy Hervey, James Winearls, James Young-Jamieson, Andrea Marshall
Clinicians make decisions about patient management on a daily basis and are required to act in a way that is both legally and ethically correct. To act legally requires compliance with a set of rules which reflect the values and interests of society. Ethical decisions are based on what we believe as a group to be morally right. Morals are, however, unique to the individual. Balancing the legal, ethical and moral dimensions of clinical decisions has the potential, therefore, to generate conflict for the individual practitioner...
May 2015: Australian Critical Care: Official Journal of the Confederation of Australian Critical Care Nurses
Gloria Comadira, Brwa Rasool, Barbara Kaprinska, Belén Márquez García, Jennifer Morris, Susan R Verrall, Micha Bayer, Peter E Hedley, Robert D Hancock, Christine H Foyer
WHIRLY1 is largely targeted to plastids, where it is a major constituent of the nucleoids. To explore WHIRLY1 functions in barley (Hordeum vulgare), RNA interference-knockdown lines (W1-1, W1-7, and W1-9) that have very low levels of HvWHIRLY1 transcripts were characterized in plants grown under optimal and stress conditions. The WHIRLY1-1 (W1-1), W1-7, and W1-9 plants were phenotypically similar to the wild type but produced fewer tillers and seeds. Photosynthesis rates were similar in all lines, but W1-1, W1-7, and W1-9 leaves had significantly more chlorophyll and less sucrose than the wild type...
July 2015: Plant Physiology
Marian D Quain, Matome E Makgopa, Belén Márquez-García, Gloria Comadira, Nieves Fernandez-Garcia, Enrique Olmos, Daniel Schnaubelt, Karl J Kunert, Christine H Foyer
Ectopic cystatin expression has long been used in plant pest management, but the cysteine protease, targets of these inhibitors, might also have important functions in the control of plant lifespan and stress tolerance that remain poorly characterized. We therefore characterized the effects of expression of the rice cystatin, oryzacystatin-I (OCI), on the growth, development and stress tolerance of crop (soybean) and model (Arabidopsis thaliana) plants. Ectopic OCI expression in soybean enhanced shoot branching and leaf chlorophyll accumulation at later stages of vegetative development and enhanced seed protein contents and decreased the abundance of mRNAs encoding strigolactone synthesis enzymes...
September 2014: Plant Biotechnology Journal
Audra Gedmintas, Julia Crilly, Brent Richards, Gregory P Comadira, Julie Creamer, James Lind, Michelle Foster
BACKGROUND: Extended daily diafiltration (EDDf) is a prolonged intermittent dialysis technique introduced as an alternative to continuous renal replacement therapy in critically ill patients. Although EDDf has the advantages of ease of use, low cost and patient tolerability, there is concern that the high blood and dialysate flow rates used with EDDf may precipitate haemodynamic instability. OBJECTIVE: To identify whether haemodynamic changes occur during the course of EDDf therapy in adult patients who are admitted to the intensive care unit with sepsis and require dialysis...
September 2010: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
Surendran Sabapathy, Donald A Schneider, Greg Comadira, Iain Johnston, Norman R Morris
This study examined the relationship between the slow component of oxygen uptake (VO2) kinetics and muscle electromyography (EMG) during severe exercise in nine young (21.7+/-0.9 yr) and nine older (71.6+/-0.8 yr) men. Oxygen uptake (VO2) and surface EMG activity of the left vastus lateralis muscle were measured during a 7-min square-wave bout of severe exercise on a cycle ergometer. The absolute amplitude of the VO2 slow component was greater and occurred approximately 60 s earlier in the young compared to older subjects...
January 15, 2004: Respiratory Physiology & Neurobiology
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