Publications
226 results found
Marlin DJ, Scott CM, Roberts CA, et al., 1998, Post exercise changes in compartmental body temperature accompanying intermittent cold water cooling in the hyperthermic horse, Equine Veterinary Journal, Vol: 30, Pages: 28-34
Marlin DJ, Schroter RC, Scott CM, et al., 1998, Equine anhidrosis - an in vivo dynamic approach, Pages: 229-231
Marlin DJ, Smith N, Schroter RC, et al., 1998, Pulmonary function and capacity in foals: genetic, intra-uterine and post-natal influences and implications for later respiratory health, Equine Vet.J., Vol: 30, Pages: 464-465
Naftali S, Schroter RC, Shiner RJ, et al., 1998, Transport phenomena in the human nasal cavity: A computational model, Annals of Biomedical Engineering, Vol: 26, Pages: 831-839
Schroter RC, Marlin DJ, Denny E, 1998, Exercise-induced pulmonary haemorrhage (EIPH) in horses results from locomotory impact induced trauma - a novel, unifying concept, Equine Veterinary Journal, Vol: 30, Pages: 186-192
Abrams DC, Toynton SC, Doru C, et al., 1997, Sterological estimation of blood vessel surface and volume densities in human normal and rhinitic nasal mucosa, Rhinology, Vol: 35, Pages: 22-27
Marlin DJ, Roberts CA, Lekeux P, et al., 1997, Dose-response characteristics of intravenous lobelin bolus on respiratory mechanics in the horse, Proc. 15th Meeting of the Comparative Respiratory Society
Denny E, Schroter RC, 1997, Relationships between alveolar size and fibre distribution in a mammalian lung alveolar duct model, Journal of Biomechanical Engineering-Transactions of the Asme, Vol: 119, Pages: 289-297
Scott CM, Marlin DJ, Schroter RC, 1997, Relationship between sweating rate and skin temperature responses during incremental exercise in the horse, Proc. International Symposium on Thermal Physiology, Pages: 45-48
Marlin DJ, Smith N, Hollingworth C, et al., 1997, Preliminary investigation into the use of lobelin to assess respiratory capacity and mechanics in 10 day old foals, Proc. 15th Meeting of the Comparative Respiratory Society
Marlin DJ, Scott CM, Schroter RC, et al., 1996, Physiological responses in nonheat acclimated horses performing treadmill exercise in cool (20 degrees C/40% RH), hot dry (30 degrees C/40% RH) and hot humid (30 degrees C/80% RH) conditions., Equine Vet J Suppl, Pages: 70-84
The aim of the present study was to determine the effect of different environmental conditions on physiological response to exercise. Four winter acclimatised, nonheat acclimated horses of different breeds were exercised at 20 degrees C/40% RH (CD), 30 degrees C/40% RH (HD) and 30 degrees C/80% RH (HH). The exercise test was designed to represent the structure and intensity of a One star Speed and Endurance test (competition exercise test [CET]). All 4 horses were able to complete the full CET (60 min + 30 min active recovery) in CD and HD, but only one horse completed the CET in HH. Two horses were stopped because of pronounced general fatigue and one because of a right atrial temperature (TRA) of 43 degrees C. Oxygen uptake on each phase was not different between CD and HD, but was higher during Phases B, C and D in HH. Mean peak TRA at the end of Phase D was 40.3 +/- 0.2, 41.6 +/- 0.4 and 42 +/- 0.3 degrees C for CD, HD and HH, respectively. Corresponding, mean peak rectal temperatures (TREC) following Phase D were 39.5 +/- 0.1, 40.6 +/- 0.1 and 41.5 +/- 0.1 degree C for CD, HD and HH, respectively. Mean time to peak TREC was 9.3 +/- 1.1 (CD), 7.3 +/- 1.8 (HD) and 10.8 +/- 2.3 (HH) min and was not significantly different between conditions (P > 0.05). Heat dissipation amounted to 83 +/- 1, 73 +/- 2 and 70 +/- 1% of heat production in CD, HD and HH, respectively. Weight loss was significantly correlated with both body surface area (CD r = 0.85; HD r = 0.87; HH r = 0.81) and bodyweight (CD r = 0.97; HD r = 0.93; HH r = 0.94). The greatest weight loss recorded was 4.6% bodyweight in one horse in HD. The mean increase in exercise intensity over the whole CET (in terms of VO2) of HD and HH and HH compared with CD was 5 +/- 3 and 14 +/- 3% higher, respectively. The exercise induced hyperthermia and the reduced capacity for heat dissipation produced partial compensatory responses in minute ventilation (VE), particularly during Phase C, when the horses were trotting.
Achaaban MR, Schroter RC, Ouhsine A, et al., 1996, Effects of intra-cerebroventricular injection of hypertonic solutions on plasma arginine vasopressin in the dromedary camel, Indian Veterinary Journal, Vol: 73, Pages: 637-644
Schroter RC, Marlin DJ, 1996, How hot is it? Using the Wet Bulb Globe Temperature Index at Three Day Events, World Equine Vet.Rev., Vol: 1, Pages: 38-44
Marlin DJ, Scott CM, Schroter RC, et al., 1996, Acclimation of horses to high temperature and humidity, The Equine Athlete, Vol: 9, Pages: 1-11
Denny E, Schroter RC, 1996, A mathematical model for the morphology of the pulmonary acinus, Journal of Biomechanical Engineering-Transactions of the Asme, Vol: 118, Pages: 210-215
Schroter RC, Baylis E, Marlin DJ, 1996, Gait, estimated net cost of transport and heat production at different speeds in Three-day-event horses, Equine Vet.J., Vol: Suppl. 22, Pages: 16-23
Schroter RC, Marlin DJ, Jeffcott LB, 1996, Use of the Wet Bulb Globe Temperature (WBGT) Index to quantify environmental heat loads during Three-day-event competitions, Equine Vet.J., Vol: Suppl. 22, Pages: 3-6
Nimon AJ, Schroter RC, Oxenham RKC, 1996, Artificial eggs: Measuring heart rate and effects of disturbance in nesting penguins, Physiology & Behavior, Vol: 60, Pages: 1019-1022
Scott CM, Marlin DJ, Schroter RC, 1996, A modified ventilated capsule for the measurement of sweating rate in the exercising horse, Equine Vet.J., Vol: Suppl. 22, Pages: 48-53
Marlin DJ, Scott CM, Schroter RC, et al., 1996, Acclimation and acclimatisation of competition horses to high temperature and humidity, Proc. 11th International Conference of Racing analysts and Veterinarians
Harris PA, Marlin DJ, Scott CM, et al., 1995, Electrolyte and total protein changes in nonheat acclimated horses performing treadmill exercise in cool (20 degrees C/40%RH), hot, dry (30 degrees C/40%RH) or hot, humid (30 degrees C/80%RH) conditions., Equine Vet J Suppl, Pages: 85-96
Four horses (H, J, N and M) undertook a simulated competition exercise test (CET), designed to simulate physiological and metabolic stresses of the Speed and Endurance (S & E) test of a 3-day-event, under 3 different environmental conditions: 20 degrees C/40% relative humidity (RH) (cool, dry [CD] 2 sessions); 30 degrees C/40% RH (hot, dry [HD]) and 30 degrees C/80% RH (hot, humid [HH]) (Marlin et al. 1995a). Venous blood samples for electrolyte and total protein (TP) determinations were collected from indwelling catheters at predetermined time points throughout each CET and initial 30 min recovery period. Venous blood samples were collected by jugular venepuncture at 2 h and 24 h after the end of the final 8 min canter (Phase D). The effects of exercise, environmental condition and horse on venous TP, sodium (Na+), potassium (K+), chloride (Cl-), calcium (Ca2+), magnesium (Mg2+) and phosphate (PO4(3-)) plasma concentrations were investigated. In addition, the effect of environmental condition on estimated cation loss was evaluated. All horses completed the full CET under the CD and HD conditions, but only one horse completed the full 8 min of the final canter Phase D under HH conditions. Exercise had a significant (P < 0.05) effect on all parameters similar to those reported previously in field competitions. There was a significant (P < 0.05) interaction between time and horse for TP, Na+ and Cl-. Overall, the environmental condition had a significant (P < 0.05) effect on all parameters, but the differences were not considered to be of any physiological relevance, other than for Cl- and TP. There was a significant (P < 0.05) interaction between time and environmental condition for Cl- and TP only. During much of the CET and recovery period, mean Cl- values were higher with the first CD session than the second CD session or under the HH or HD conditions. For TP after 2 min of Phase D and during the initial recovery period, concentrations were higher
Harris PA, Marlin DJ, Mills PC, et al., 1995, Clinical observations made in nonheat acclimated horses performing treadmill exercise in cool (20 degrees C/40%RH), hot, dry (30 degrees C/40%RH) or hot, humid (30 degrees C/80%RH) conditions., Equine Vet J Suppl, Pages: 78-84
Four horses (H, J, N and M) undertook a treadmill competition exercise test (CET), designed to simulate the physiological and metabolic stresses of the Speed and Endurance phase of a 3-day-event, under 3 different environmental conditions: 20 degrees C/40% relative humidity (RH) (cool, dry [CD]: 2 sessions); 30 degrees C/40%RH (hot, dry [HD]) and 30 degrees C/80%RH (hot, humid [HH]) (Marlin et al. 1995). A number of subjective clinical observations were made at designated time points throughout the exercise test and initial recovery period including buccal mucous membrane colouration, capillary refill time, neck and point of shoulder skin pinch recovery time, grade of abdominal sounds; anal sphincter tone as well as the presence or absence of fatigue and ataxia. The aim was to investigate their value in predicting performance in the final canter phase of the CET equivalent to the cross-country or Phase D of a field competition. In addition, the use of a more objective assessment, the cardiac recovery index (CRI), was investigated together with the heart rate, rectal temperature and respiratory frequency at the end of Phase C and at the 8 min point of the 10 Minute Box (8'X). The CRI was calculated according to the formula CRI = P2-P1 where P2 = the heart rate in beats/min at the 8 min point of the '10 Minute Box' (Phase X) of the CET. P1 = the heart rate (beats/min) at the 7 min point just before the horse was made to trot over a distance of 80 m at a speed of 3.7 m/s (at a 3 degrees incline) before returning to a walk. The study suggested that the subjective tests carried out at the 'End-C' and/or '8'X' time points were not useful in predicting subsequent performance in the final canter phase (Phase D) and neither were heart rate, rectal temperature or respiratory frequency. However, the only horse (Horse H) to complete the full CET under HH conditions was the only animal to show a decrease in respiratory frequency between the End-C and 8'X time points. All others
Robson AG, Roberts DN, Rusznac C, et al., 1995, Inhaled sulphur dioxide increases nasal secretion in normal subjects, Eur. Respir. J., Vol: 19
Roberts DN, Robson AG, Schroter RC, et al., 1995, Nasal secretary response to topical histamine H1 and H2 agonists in normal subjects, Eur Respir. J., Vol: 19
Nimon AJ, Schroter RC, Oxenham RKC, et al., 1995, Artificial eggs: An unobtrusive technology for short-term monitoring of penguin disturbance responses to human activity, 6th SCAR Biology Symposium: Antarctic Communities
Schroter RC, Marlin DJ, 1995, An index of the environmental thermal load imposed on exercising horses and riders by hot weather conditions, Equine Vet.J., Vol: Suppl. 20, Pages: 16-22
Marlin DJ, Harris PA, Schroter RC, et al., 1995, Physiological, metabolic and biochemical responses of horses competing in the speed and endurance phase of a CCI**** 3-day event, Equine Vet.J., Vol: Suppl.20, Pages: 37-46
Denny E, Schroter RC, 1995, The mechanical behaviour of a mammalian lung alveolar duct, ASME J.Biomech.Eng., Vol: 117, Pages: 254-261
Nimon AJ, Schroter RC, Stonehouse B, 1995, Heart-Rate of Disturbed Penguins, Nature, Vol: 374
Lever MJ, Schroter RC, 1995, The deposition of materials in the respiratory tract, Occupational Hygiene, Editors: Harrington, Harrington, Oxford, Publisher: Blackwell, Pages: 23-43
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