21 research outputs found

    Charmed hadron production in Z decays

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    SIGLEAvailable from British Library Document Supply Centre-DSC:DXN051639 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

    Salicin from host plant as precursor of salicylaldehyde in defensive secretion of chrysomeline larvae

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    ABSTRACT. Phratora vitellinae L. and Chrysomela tremulae F. (Chrysomelinae, Coleoptera) feed on Salix or Populus spp. (Salicaceae). Their larvae, as well as the larvae of other chrysomelines feeding on Salicaceae, secrete salicylaldehyde. In this study, we demonstrate that salicylaldehyde is derived from salicin, a phenylglucoside present in the leaves of the host plant. The concentration of salicylaldehyde in the secretion is positively correlated with the amount of salicin in the food of the larvae. The transformation of salicin into salicylaldehyde occurs in the defence glands since the β‐glucosidase activity is 4 times higher in their glands than in the gut. The larvae recover most of the glucose that results from the hydrolysis of salicin. For generalist predators, such as ants, salicylaldehyde is a more potent deterrent than saligenin or salicin. Copyright © 1983, Wiley Blackwell. All rights reservedSCOPUS: ar.jFLWNAinfo:eu-repo/semantics/publishe

    Search for a scalar top quark using the OPAL detector

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    Contains fulltext : 124482.pdf (preprint version ) (Open Access

    Topological search for the production of neutralinos and scalar particles

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    Contains fulltext : 124609pre.pdf (preprint version ) (Open Access) Contains fulltext : 124609pub.pdf (publisher's version ) (Open Access

    Test of QCD analytic predictions for the multiplicity ratio between gluon and quark jets

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    Contains fulltext : 124606pub.pdf (publisher's version ) (Open Access) Contains fulltext : 124606pre.pdf (preprint version ) (Open Access

    A Study of b quark fragmentation into B0 and B+ mesons at LEP

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    Contains fulltext : 124531.pdf (preprint version ) (Open Access

    Search for scalar top and scalar bottom quarks using the OPAL detector at LEP

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    Improved measurement of the lifetime of the tau lepton

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    Contains fulltext : 124585.pdf (preprint version ) (Open Access
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