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The 2004 Pre-Olympic Congress

作者： Stahn A Strobel G terblanche e Dept.Medical Physiology and Biochemistry University of Stellenbosch Institut fur Sportmedizin Charite-UniversitatsmedizinCampus Benjamin FranklinFreie Universitat Berlin

＜正＞Introduction According to the follow-up to the National Institutes of Health Technology Assessment Conference on bioelectrical impedance analysis（BIA）the relationship between BIA and blood parameters is still poorly understood[1].In vitro studies suggest that these relationships offer the potential for several future clinical *** has recently been

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KINANTHROPOMeTRIC AND PHYSIOLOGICAL DIFFeReNCeS BeTWeeN eLITe AND SUB-eLITe RIVeR MARATHON PADDLeRS

KINANTHROPOMETRIC AND PHYSIOLOGICAL DIFFERENCES BETWEEN ELIT...

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The 2004 Pre-Olympic Congress

作者： Kroff Jacolene J terblanche elmarie e Department of Medical Physiology and Biochemistry University of Stellenbosch

＜正＞Introduction Scientific testing on paddlers has been problematic in the past,where the identification of superior attributes in the successful paddler was based on less specific laboratory tests,*** crank *** research[1]showed that it is imperative that performance tests used in a laboratory setting should simulate the kayak stroke to impose the

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False codling moth Thaumatotibia leucotreta （Lepidoptera, Tortricidae） larvae are chill-susceptible

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Insect Science 2012年第3期19卷 315-328页

作者： Leigh Boardman Tim G. Grout John S. terblanche Department of Conservation ecology and entomology Faculty of Agrisciences Stellenbosch University Stellenbosch South Africa Citrus Research International Nelspruit South Africa

This study reports on the low temperature tolerance and cold hardiness of larvae of false codling moth, Thaumatotibia leucotreta. We found that larvae have mean critical thermal minima （lower limits of activity） of 6.7℃ which was influenced by feeding status. The effects of low temperature exposure and duration of exposure on larval survival were assessed and showed that the temperature at which 50% of the population survives is -11.5 ± 0.3℃ after 2 h exposure. The supercooling point （SCP, i.e., freezing temperature） was investigated using a range of cooling rates and under different conditions （feeding and hydration status） and using inoculative freezing treatments （in contact with water or orange juice）. The SCP decreased significantly from -15.6℃ to -17.4℃ after larvae were fasted for 24 h. Twenty-four hour treatments at either high or low relative humidity （95.9% or 2.4%） also significantly decreased SCP to -17.2℃ and -18.2℃ respectively. Inoculative freezing （by water contact） raised SCP from -15.6℃ to -6.8℃ which could have important implications for post-harvest sterilization. Cooling rates did not affect SCP which suggests that there is limited phenotypic plasticity of SCP during the larval life-stage, at least over the short time-scales investigated here. In conclusion, larvae of T. leucotreta are chill-susceptible and die upon freezing. These results are important in understanding this pest＇s response to temperature variation, understanding pest risk status and improving post-harvest sterilization efficacy

关键词： behavior chill injury cold hardiness disinfestations extracellular freezing,lethal limits life-stage

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