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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 32 (1980), S. 69-76 
    ISSN: 1432-0827
    Keywords: Bone ; Marrow ; Blood flow ; Microspheres
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Blood flow was measured in mature and immature dogs by means of tracer microspheres. Microspheres of 15 µm were found to be the most suitable size in the dog. Total body nonentrapment in the awake, standing dog is likely to be less than 10%. Cortical bone flood flow, devoid of periosteum and marrow, is 2.5 ml/100 g/min in mature dogs and 7.0 ml/100 g/min in immature dogs,P〈0.005. Blood flow in cancellous bone is greater than that in cortical bone in mature (P〈0.001) and immature (P〈0.02) dogs. Flow is different in different regions of a long bone because of different proportions of cortical and cancellous bone, probably because of interrelationships of function (surfaces undergoing remodeling) and, therefore, of energy metabolism and blood flow.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of agricultural and environmental ethics 13 (2000), S. 205-217 
    ISSN: 1573-322X
    Keywords: Animal welfare ; Australia ; blowfly ; fly strike ; New Zealand ; sheep ; United Kingdom
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Philosophy
    Notes: Abstract Fly strike is a painful conditioncaused by live maggots eating at the flesh of sheep.Remedies for this disorder are traumatic, with sheepundergoing painful mulesing and tail dockingoperations to protect against flystrike. In an attemptto find control solutions and to understand thedisorder, Australasian researchers increase sheepsuffering by conducting experiments that artificiallyinduce fly strike. Some of these experiments have noapplication in prevention and control of fly strike.Many others could be modified or replaced with lesspainful techniques. Anecdotal evidence through communication withorganic farmers suggests that fly strike is largelypreventable if farmers keep sheep healthy and inspectthem regularly. Some organic farmers have largelyeliminated fly strike from their farm. Investigationson fly strike control using non-intrusive techniquesare also progressing in Australasia and the UnitedKingdom. Since it is possible to conduct useful research andto run profitable farms with little or no fly strike,much of the current management, research and policy onsheep farming is ethically questionable even to thoseholding the moderate view that animals can be used forhuman purposes providing suffering is kept to aminimum. Sheep farmers will need to take animalwelfare problems into consideration. Greatercommunication among researchers needs to be encouragedto prevent unnecessary duplication of experiments.International trade regulations will also need toallow trade barriers based on animal welfareconcerns.
    Type of Medium: Electronic Resource
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