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Ficus burtt-davyi, like most other fig species (Ficus, Moraceae), is exclusively pollinated by its own unique species of fig wasp, in this caseElisabethiella baijnathi (Chalcidoidea, Agaonidae). Because fig crop development on any one tree is usually synchronised, the small and short-lived
female wasps have to migrate and find other trees bearing figs which are at suitable stage of development for oviposition.
However, the likelihood of successful location and subsequent arrival at a new host tree is dependent on distance and the
effect of environmental factors such as wind and temperature. This study examines the relationship between ambient temperatures
and the timing of fig wasps emergence from their natal figs and the commencement of their dispersal flight. The behaviour
of the wasps arriving at figs which were ready to be pollinated was also examined. The female wasps did not appear to distinguish
between the figs and other parts of the tree when in flight. However, after landing on the tree their search for figs was
more directed as they visited more figs than leaves. Short-range recognition of figs appears to be by contact chemo-reception,
but the wasps showed a preference for entering figs which did not already contain a female wasp. 相似文献
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α-
Jean-Paul Mornon Dyna Halaby Marc Malfois Patrick Durand Isabelle Callebaut Annette Tardieu 《International journal of biological macromolecules》1998,22(3-4)
New results obtained from a two-dimensional sequence analysis of the small heat shock protein (shsp) family are described. It is confirmed that the conserved C-terminal α-crystallin domain is essentially made of β-strands, most probably two groups of β-strands separated by a large loop. A direct correspondence between the putative β-strands that have been identified in shsps and the seven β-strands of a classical immunoglobulin-like fold is proposed. The hypothesis that the shsp family could belong to the immunoglobulin superfamily (IgSF) is consistent with the ubiquitous distribution and the multifunctional properties of the crystallins that are now emerging. 相似文献
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Determination of
Ichiro Ono Keizo Matsuda Sachiko Kanno 《Journal of chromatography. B, Analytical technologies in the biomedical and life sciences》1997,692(2)
A simple, rapid and sensitive two column-switching high-performance liquid chromatographic (HPLC) method with ultraviolet detection at 210 nm has been developed for the determination of
(AY4166, I) and its seven metabolites in human plasma and urine. Measurements of I and its metabolites were carried out by two column-switching HPLC, because metabolites were classified into two groups according to their retention times. After purification of plasma samples using solid-phase extraction and direct dilution of urinary samples, I and each metabolite were injected into HPLC. The calibration graphs for plasma and urinary samples were linear in the ranges 0.1 to 10 μg ml−1 and 0.5 to 50 μg ml−1, respectively. Recoveries of I and its seven metabolites were over 88% by the standard addition method and the relative standard deviations of I and its metabolites were 1–6%. 相似文献
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Synthesis of methyl
-Ribose was converted into methyl
and this, on tin-mediated allylation, gave a mixture of the 2-O-allyl and 3-O-allyl derivatives which were separated by chromatography. The more polar isomer was characterised as the 3-O-allyl derivative after conversion via
(which was also synthesised from
) into the known
. Methyl
was converted into methyl
via methyl
. 相似文献
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