958 resultados para FLOWER VISITOR WEBS


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Reassuring visitors about their health and safety is particularly important for tourist destinations since the terrorist attacks of 11 September 2001. This study examined the deaths of 1513 overseas visitors to Australia over a four-year period, and found that most deaths (76%) were due to natural causes.Among the accidental deaths, the main causes were motor vehicle crashes and water-related incidents. The study findings support a widely held view that Australia is a safe destination for overseas visitors. It also provides a safety benchmark for other tourist destinations.

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Essential oils of rice flower, Ozothamnus diosmifolius, were analyzed by capillary gas chromatograplay-mass spectrometry. Flower oil contained beta-pinene (28.4%) and 1,8-cineole (28.2%), while the leaf oil contained a-pinene (26.0%), beta-pinene (11.6%) and 1,8-cineole (22.2%). Both oils had small amounts of spathulenol (4.1% and 5.2%, respectively).

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Tese de mestrado em Antropologia, especialização natureza e conservação

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Bees visiting flowers of Bertholletia excelsa. (Brazil Nut tree) and Couratari tenuicarpa were collected, their behavior described and the pollen found clinging to their dorsal thorax and stored on their legs was identified. Female bees of Xylocopa frontalis(Olivier) and males of Eulaema mocsaryi (Friese) are apparently effective pollinators of Couratari in igapó near Manaus. Female bees of Euplusia seabrai Moure in litt., Epicharis umbraculata (Fabricius), Epicharis rustica (Olivier) and Eulaema nigrita(Lepeletier), as well as male bees of Eulaema cingulata(Fabricius) and Eulaema nigrita are apparently effective pollinators of adult Brazil Nut trees in the Aleixo plantation near Manaus. Only large bees capable of uncurling the floral androecium can effectively pollinate Couratari or Bertholletia.Pollen analysis indicated that all bees captured carried pollen of the host tree in question and had been foraging on flowers of plant species common in secondary growth. Secondary growth near the Aleixo plantation supports a bee guild which appeared to effectively pollinate almost every flower on the Brazil Nut tree studied. Proximity to primary forest (and to those Euglossine bee species which occur only in primary forest) therefore does not appear to be necessary for pollination of Brazil Nut trees.In the Aleixo plantation chronic low fruit set is probably due to some factor other than pollination. Since natural occurrences of Brazil Nut trees to the north and south of Manaus are associated with a higher soil fertility, low production at the Aleixo plantation may be due to deficiencies of the soil.

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The volatile constituents obtained from the pentane extract, using simultaneous distillation-extraction of the flowers of Encyclia vespa and E. fragrans were analysed by GC/ MS. The main volatile components identified in the flowers of E. vespa were terpinen-4-ol (20.3%), verbenone (14.8%), trans-verbenol (13.6%) and x-pinene (11.8%). The major volatiles of the flowers of E. fragrans were terpinen-4-ol (18.3%), (2Z,6E)-farnesol (15.4%) and trans-verbenol (10.2%).

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Tese de Doutoramento em Biologia de Plantas.

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v.1-2=no.1-71 (1787-1790) [Lacks:no.27]

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v.11-12=no.361-432 (1797-1798)

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v.13-14=no.433-504 (1799-1800)

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v.3-4:no.73-144 (1790-1791)

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v.5-6=no.145-216 (1792-1793)

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v.7-8=no.217-288 (1794)

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v.9-10=no.289-360 (1795-1796)