I am a retired government scientist and was for several years a Visiting Fellow at the Australian National University in Archaeology and Zoology. I continue to do independent research. Address: 102 Bandjalong Crescent, Aranda, Canberra, Australian Capital Territory, Australia 2614
Levels of UVB are reported from a littoral rainforest at Depot Beach in NSW, Australia. These are... more Levels of UVB are reported from a littoral rainforest at Depot Beach in NSW, Australia. These are compared with readings from a rainforest in North Queensland, Australia. Their possible ecological significance is briefly discussed.
Chris is a middle-aged American man living in Virginia with his wife Jen and their children. All ... more Chris is a middle-aged American man living in Virginia with his wife Jen and their children. All but one child is from Jen's previous marriage. Joe is older than Chris and lives next door. Chris reports that his wife regularly has sexual intercourse with their neighbour Joe. Chris claims that he is powerless to prevent this, but he seems to allow it and I suspect enjoys the situation to some extent. He expresses obsessive interest in the idea that Joe "owns" his wife's "pussy" and has sought quasilegal ways to notarise this.
The Leidenfrost effects could provide a feasible mechanism for aqueous life forms to survive on v... more The Leidenfrost effects could provide a feasible mechanism for aqueous life forms to survive on very hot or very cold planetary surfaces.
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1983
2-Deoxyglucose was found to be a substrate for the regeneration of GSH from GSSG in the red blood... more 2-Deoxyglucose was found to be a substrate for the regeneration of GSH from GSSG in the red blood cells of humans, sheep, goats and cattle. The regeneration rate with 2-deoxyglucose varied from 15 to 56% of the rate with glucose. It is likely that 2-deoxyglucose is phosphorylated to 2-deoxyglucose-6-phosphate by HK and is then oxidized to 2-deoxygluconate-6-phosphate by G6PD. The latter reaction would produce the NADPH required for GSH regeneration.
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1980
Abstract 1. 1. The effect of experimental anemia induced by phlebotomy on some red cell metabolit... more Abstract 1. 1. The effect of experimental anemia induced by phlebotomy on some red cell metabolites and enzymes has been studied in the goat. 2. 2. Mean levels of reduced glutathione (GSH) rose from 4.5 to 7.0 μmols/gHb, and ATP from 2 to nearly 3 μmols/gHb. 2,3-DPG rose from a mean concentration of 1 μmol/gHb to 3.4 μmols/gHb as a result of anaemia. 3. 3. G6PD activity increased from a mean of 2.5 enzyme units (E.U.) to 3.25 E.U. and 6PGD increased from 3.5 E.U. to 5.0 E.U. The activity of LDH rose from 20 E.U. to 30 E.U. 4. 4. Mammals with low red cell 2,3-DPG levels, such as the goat, have raised levels of 2,3-DPG and ATP during anaemia. The adaptive significance of this is uncertain.
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1980
Abstract 1. 1. Individual sheep show different rates of glucose-dependent methaemoglobin reductio... more Abstract 1. 1. Individual sheep show different rates of glucose-dependent methaemoglobin reduction by their red cells. 2. 2. Sheep with high levels of red cell reduced glutathione (GSH) tend to have higher rates of glucose-dependent methaemoglobin reduction than sheep with low levels of GSH. 3. 3. No difference was observed between high GSH and low GSH sheep in the average rate of methaemoglobin reduction using lactate as the substrate. 4. 4. Lactate-dependent rates were higher than glucose-dependent rates of methaemoglobin reduction in all sheep. 5. 5. There was a good negative correlation between the GSH level in individual sheep and the amount of difference between the lactate-dependent and glucose-dependent rates.
Animal welfare is expected to increase in importance as a political and marketing issue. There is... more Animal welfare is expected to increase in importance as a political and marketing issue. There is a vigorous debate about what, besides the absence of physical pain, is necessary for acceptable animal welfare. This paper focuses on the present state of animal welfare policy at the national level.
International Journal for the Psychology of Religion, 1998
APA PsycNET Our Apologies! - The following features are not available with your current Browser c... more APA PsycNET Our Apologies! - The following features are not available with your current Browser configuration. - alerts user that their session is about to expire - display, print, save, export, and email selected records - get My ...
The juxtaposition of orange and yellow is a common feature of parrot plumage. This note includes ... more The juxtaposition of orange and yellow is a common feature of parrot plumage. This note includes some examples.
Two merino sheep and two angora goats were subjected to simulated altitudes of up to 5500 m for a... more Two merino sheep and two angora goats were subjected to simulated altitudes of up to 5500 m for about 10 h per day for 38 days. Packed cell volume (PCV), haemoglobin (Hb) concentration and red blood cell (RBC) levels of reduced glutathione (GSH) and 2,3-diphosphoglycerate (2,3-DPG) were measured at regular intervals. Mean PCV increased from 33 per cent to 60 per cent in the sheep and from 33 per cent to 45 per cent in the goats. Mean Hb concentration rose from 11.7 g/dl to 23.1 g/dl in the sheep, and from 11.4 g/dl to 16.0 g/dl in the goats. The level of GSH began to rise in the sheep only after the animals were no longer being subjected to the hypoxic stress, increasing by about 20 mg/dl RBC. In the goats, the levels of GSH rose during, as well as after, the period of hypoxic stress, also by about 20 mg/dl RBC. No change in 2,3-DPG levels was found in either species.
I discuss my personal condition with a rare circulatory anomaly over the years as medicine and at... more I discuss my personal condition with a rare circulatory anomaly over the years as medicine and attitudes change.
Animal welfare is expected to increase in importance as a political and marketing issue. There is... more Animal welfare is expected to increase in importance as a political and marketing issue. There is a vigorous debate about what, besides the absence of physical pain, is necessary for acceptable animal welfare. This paper focuses on the present state of animal welfare policy at the national level.
Comparative Biochemistry and Physiology Part A: Physiology, 1990
1. 1. Of the mammals that have relia mirabilia (sing. rete mirabile ) in their limbs many are div... more 1. 1. Of the mammals that have relia mirabilia (sing. rete mirabile ) in their limbs many are divers, burrowers or arboreal species which maintain clinging postures. 2. 2. In this review paper it is proposed that retia , by lowering the temperature of the limbs and therefore oxygen utilization in their tissues, may be adaptive in situations where oxygen availability is low. 3. 3. In diving and burrowing mammals there is a lack of oxygen to the whole animal and, in particular, to the limbs if there is preferential diversion of blood flow to the trunk and head. Cool limbs mean that less oxygen is likely to be needed and utilized in their tissues. Also less heat is lost from the limbs to the environment and the animal can save on the oxygen utilization needed for metabolic heat production. 4. 4. In arboreal mammals which maintain clinging postures and have the highly-developed retia known as vascular bundles, availability of oxygen as well as nutrients to the limbs may be affected due ...
Levels of UVB are reported from a littoral rainforest at Depot Beach in NSW, Australia. These are... more Levels of UVB are reported from a littoral rainforest at Depot Beach in NSW, Australia. These are compared with readings from a rainforest in North Queensland, Australia. Their possible ecological significance is briefly discussed.
Chris is a middle-aged American man living in Virginia with his wife Jen and their children. All ... more Chris is a middle-aged American man living in Virginia with his wife Jen and their children. All but one child is from Jen's previous marriage. Joe is older than Chris and lives next door. Chris reports that his wife regularly has sexual intercourse with their neighbour Joe. Chris claims that he is powerless to prevent this, but he seems to allow it and I suspect enjoys the situation to some extent. He expresses obsessive interest in the idea that Joe "owns" his wife's "pussy" and has sought quasilegal ways to notarise this.
The Leidenfrost effects could provide a feasible mechanism for aqueous life forms to survive on v... more The Leidenfrost effects could provide a feasible mechanism for aqueous life forms to survive on very hot or very cold planetary surfaces.
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1983
2-Deoxyglucose was found to be a substrate for the regeneration of GSH from GSSG in the red blood... more 2-Deoxyglucose was found to be a substrate for the regeneration of GSH from GSSG in the red blood cells of humans, sheep, goats and cattle. The regeneration rate with 2-deoxyglucose varied from 15 to 56% of the rate with glucose. It is likely that 2-deoxyglucose is phosphorylated to 2-deoxyglucose-6-phosphate by HK and is then oxidized to 2-deoxygluconate-6-phosphate by G6PD. The latter reaction would produce the NADPH required for GSH regeneration.
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1980
Abstract 1. 1. The effect of experimental anemia induced by phlebotomy on some red cell metabolit... more Abstract 1. 1. The effect of experimental anemia induced by phlebotomy on some red cell metabolites and enzymes has been studied in the goat. 2. 2. Mean levels of reduced glutathione (GSH) rose from 4.5 to 7.0 μmols/gHb, and ATP from 2 to nearly 3 μmols/gHb. 2,3-DPG rose from a mean concentration of 1 μmol/gHb to 3.4 μmols/gHb as a result of anaemia. 3. 3. G6PD activity increased from a mean of 2.5 enzyme units (E.U.) to 3.25 E.U. and 6PGD increased from 3.5 E.U. to 5.0 E.U. The activity of LDH rose from 20 E.U. to 30 E.U. 4. 4. Mammals with low red cell 2,3-DPG levels, such as the goat, have raised levels of 2,3-DPG and ATP during anaemia. The adaptive significance of this is uncertain.
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1980
Abstract 1. 1. Individual sheep show different rates of glucose-dependent methaemoglobin reductio... more Abstract 1. 1. Individual sheep show different rates of glucose-dependent methaemoglobin reduction by their red cells. 2. 2. Sheep with high levels of red cell reduced glutathione (GSH) tend to have higher rates of glucose-dependent methaemoglobin reduction than sheep with low levels of GSH. 3. 3. No difference was observed between high GSH and low GSH sheep in the average rate of methaemoglobin reduction using lactate as the substrate. 4. 4. Lactate-dependent rates were higher than glucose-dependent rates of methaemoglobin reduction in all sheep. 5. 5. There was a good negative correlation between the GSH level in individual sheep and the amount of difference between the lactate-dependent and glucose-dependent rates.
Animal welfare is expected to increase in importance as a political and marketing issue. There is... more Animal welfare is expected to increase in importance as a political and marketing issue. There is a vigorous debate about what, besides the absence of physical pain, is necessary for acceptable animal welfare. This paper focuses on the present state of animal welfare policy at the national level.
International Journal for the Psychology of Religion, 1998
APA PsycNET Our Apologies! - The following features are not available with your current Browser c... more APA PsycNET Our Apologies! - The following features are not available with your current Browser configuration. - alerts user that their session is about to expire - display, print, save, export, and email selected records - get My ...
The juxtaposition of orange and yellow is a common feature of parrot plumage. This note includes ... more The juxtaposition of orange and yellow is a common feature of parrot plumage. This note includes some examples.
Two merino sheep and two angora goats were subjected to simulated altitudes of up to 5500 m for a... more Two merino sheep and two angora goats were subjected to simulated altitudes of up to 5500 m for about 10 h per day for 38 days. Packed cell volume (PCV), haemoglobin (Hb) concentration and red blood cell (RBC) levels of reduced glutathione (GSH) and 2,3-diphosphoglycerate (2,3-DPG) were measured at regular intervals. Mean PCV increased from 33 per cent to 60 per cent in the sheep and from 33 per cent to 45 per cent in the goats. Mean Hb concentration rose from 11.7 g/dl to 23.1 g/dl in the sheep, and from 11.4 g/dl to 16.0 g/dl in the goats. The level of GSH began to rise in the sheep only after the animals were no longer being subjected to the hypoxic stress, increasing by about 20 mg/dl RBC. In the goats, the levels of GSH rose during, as well as after, the period of hypoxic stress, also by about 20 mg/dl RBC. No change in 2,3-DPG levels was found in either species.
I discuss my personal condition with a rare circulatory anomaly over the years as medicine and at... more I discuss my personal condition with a rare circulatory anomaly over the years as medicine and attitudes change.
Animal welfare is expected to increase in importance as a political and marketing issue. There is... more Animal welfare is expected to increase in importance as a political and marketing issue. There is a vigorous debate about what, besides the absence of physical pain, is necessary for acceptable animal welfare. This paper focuses on the present state of animal welfare policy at the national level.
Comparative Biochemistry and Physiology Part A: Physiology, 1990
1. 1. Of the mammals that have relia mirabilia (sing. rete mirabile ) in their limbs many are div... more 1. 1. Of the mammals that have relia mirabilia (sing. rete mirabile ) in their limbs many are divers, burrowers or arboreal species which maintain clinging postures. 2. 2. In this review paper it is proposed that retia , by lowering the temperature of the limbs and therefore oxygen utilization in their tissues, may be adaptive in situations where oxygen availability is low. 3. 3. In diving and burrowing mammals there is a lack of oxygen to the whole animal and, in particular, to the limbs if there is preferential diversion of blood flow to the trunk and head. Cool limbs mean that less oxygen is likely to be needed and utilized in their tissues. Also less heat is lost from the limbs to the environment and the animal can save on the oxygen utilization needed for metabolic heat production. 4. 4. In arboreal mammals which maintain clinging postures and have the highly-developed retia known as vascular bundles, availability of oxygen as well as nutrients to the limbs may be affected due ...
Besides any astrobiological significance, it seems possible that membranous structures such as az... more Besides any astrobiological significance, it seems possible that membranous structures such as azotosomes could contribute to the flatness of the surface of the lakes on Titan.
The hobbit, Homo floresiensis, could have been dwarfed by his low ultraviolet, rainforest environ... more The hobbit, Homo floresiensis, could have been dwarfed by his low ultraviolet, rainforest environment
Uploads
Papers by Julian O'Dea