579 research outputs found

    Action planning and assessment in guidance contexts: how can I understand and support these processes while working with colleagues in Further Education colleges and career service provision in Avon?

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    SIGLEAvailable from British Library Document Supply Centre-DSC:DXN008437 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

    Preimaginal Environment Influences Adult Flight in Cydia molesta (Lepidoptera: Tortricidae)

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    Dispersal of adult tortricid moths between habitats may have important consequences for pest management in orchards, but little is known about how flight parameters are affected by environmental conditions during preimaginal development. The influence of changing temperature and photoperiod (both singly and in combination) as well as of larval crowding and food deprivation were investigated in Cydia molesta Busck (Lepidoptera: Tortricidae), a species that has been found to disperse after peach harvest and colonize pome fruit orchards. Comparative assessments of flight parameters were made on a computer-linked flight mill and life history traits were evaluated. A significant increase in flight performance was correlated with preimaginal exposure to decreasing photoperiod. In addition, pupal development was delayed and larger individuals emerged, but preimaginal survivorship was reduced. Decreasing and increasing temperature regimens and increasing photoperiod did not influence adult flight. Larval crowding was associated with increased flight, but the differences were not statistically significant. Food deprivation was associated with accelerated preimaginal development, lower pupal weight, less fecund adults, and reduced flight. We propose that the main factor eliciting dispersal in this tortricid is decreasing photoperio

    Pleistocene rockshelters J23 and J24, Mesa J, Pilbara, Western Australia

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    Two spatially close rockshelters at Mesa J in the Pilbara had relatively deep deposits and large numbers of stone artifacts distributed from top to bottom. The basal archaeological materials have been directly dated as (in the case of J24) or are inferred to be (in the case of J23) late Pleistocene in age. In J24 artefacts continued downwards throughout basal Spit 10, indicating that occupation of the rockshelter began before 27,657 cal BP, possibly thousands of years before. The distribution of stone artefacts and radiocarbon dates in J24 indicates that occupation of the rockshelter continued during the Last Glacial Maximum (LGM), providing further evidence that the Hamersley Plateau provided refuge for Aboriginal people during the cold and arid conditions of the LGM

    A rapid and simple method of detection of Blepharisma japonicum using PCR and immobilisation on FTA paper

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    BACKGROUND: The rapid expansion in the availability of genome and DNA sequence information has opened up new possibilities for the development of methods for detecting free-living protozoa in environmental samples. The protozoan Blepharisma japonicum was used to investigate a rapid and simple detection system based on polymerase chain reaction amplification (PCR) from organisms immobilised on FTA paper. RESULTS: Using primers designed from the α-tubulin genes of Blepharisma, specific and sensitive detection to the equivalent of a single Blepharisma cell could be achieved. Similar detection levels were found using water samples, containing Blepharisma, which were dried onto Whatman FTA paper. CONCLUSION: This system has potential as a sensitive convenient detection system for Blepharisma and could be applied to other protozoan organisms

    Bridging the Theory-practice Divide: A Creative Approach to Effective Teacher Preparation

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