1000 resultados para 1995_03201620 TM-24 4500905


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The Swiss national database was launched August 2000 based on the 10 SGM Plus loci. With the aim ofaddressing the needs of the next-generation European STR genotyping systems in Switzerland, wevalidated the NGM SElectTM kit. In this study, we present the results of forensic validation studiesincluding the following aspects: sensitivity, heterozygote peak height ratio calculations, performancewith simulated PCR inhibition, proficiency tests and Swiss population data.

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Kirje 24.11.1973

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A bi-weekly newsletter for those involved in the fields of homeland security and/or emergency management

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1. The "general activity" of Apodemus Sylvaticus L. has been recorded and analysed using two techniques: a) in an actograph, several components of the "general activity" have been recorded and quantified over 24 hours, including wheel running, locomotion in various areas of the enclosure, nest occupancy, drinking, eating and hoarding; b) in a breeding cage, ten times smaller than the actograph and where the possibilities of locomotion are considerably reduced, the wheel running only has been recorded. In these two situations, we have compared the effects of a food deprivation for 24 hours. 2. In the actograph, starvation increases the general locomotion in the enclosure without detectable changes in wheel running. On the other hand, in the breeding cage, wheel running is somewhat increased. 3. Refeeding results in decreased wheel running under both experimental conditions, and restores general locomotion in the actograph to the predeprivation level. 4. These results are discussed in view of the current literature. The apparent disagreement between our results and those of other workers is attributed to the fact that the latter used experimental conditions where the measured response was predetermined by the lack of choice in expressed responses which were offered to the animal. Consequently, we suggest that the interpretation of such experiments can be improved by allowing a choice of possible behavioural response and that each of them should be recorded separately.

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Kirje

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Kirje

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Record of the Fatalities for Motor Vehicle Accidents in Iowa per week.

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The qualitative and quantitative losses caused by stored product insects are of great concern, and since there is only a few active ingredients available for their control it is very important to have a frequent insect resistance monitoring. The objective of this research is to evaluate combination of bioassays and molecular marker techniques to detect insecticide resistance in stored product beetles. The Coleoptera species used for the tests were Sitophilus oryzae (L.) (Curculionidae), Rhyzopertha dominica (F.) (Bostrichidae) and Oryzaephilus surinamensis (L.) (Silvanidae). For the bioassays it was used the impregnated filter paper technique, applying 1 mL of deltamethrin (K-Obiol 25 CE TM) using four concentrations and five replicates, including a control with solvent only. Ten adults of each species were liberated separately on each dish. The mortality was evaluated after 24 h and resistance determined by probit analysis. The samples used for the PCR-RAPD were either in vivo or preserved in 70% ethanol, kept in -18°C freezer. After extraction, quantification and DNA quality analysis, the 25 µL samples had the DNA amplified and tested with six primers. The bioassays showed a crescent mortality proportional to insecticide concentration. The resistance factor for R. dominica, S. zeamais and S. oryzae were: 2,2; 3,2 and 9,2, respectively, compared to the susceptible populations of each species. The PCR-RAPD analysis revealed bands which indicate inter and intraspecific variability in the populations, but it was not possible to correlate them to resistance. The association of bioassay and PCR-RAPD represents a precise and valuable tool for resistance management of stored product insects, but more populations and primers should be tested.

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Weekly newsletter

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Kirje 24.5.1927