576 research outputs found
Regulation on Pardosa pseudoannulata maternal care by pulli through promoting m-Aminophenylacetylene generation-Supplement information table.xlsx
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As a representative animal with the maternal care (MC) property, female lycosidaen spiders exhibit extensive MC with typical pulli-carrying (PC) behaviour that mother spiders carry the newly-hatched spiderlings (pulli) on their back of abdomens. Using Pardosa pseudoannulata (Araneae, Lycosidae) as a representative species, it was found that MC in Lycosidae spiders was regulated by pulli. When PC females were separated from pulli, they lost MC, reflecting in the increase of pulli cannibalism and decrease in pulli carrying. Continuous exposure of non-PC females (virgin females and females at post-reproduction stage) to pulli boosted up MC. The compound m-Aminophenylacetylene (m-A) stood out in the cuticular component comparison between PC and non-PC females as m-A was abundantly present in PC females but was scarce in non-PC females. The concentration of m-A positively correlated with MC in spiders. The m-A content in non-PC females were increased when adding pulli. Topical application of m-A to non-PC females triggered MC in females. The results indicated that P. pseudoannulata pulli could sensitize female MC by activating m-A generation. The sensitization of P. pseudoannulata MC through m-A was first reported in arthropods. m-A is different from all substances for MC sensitization in mammals and represents a novel regulator on arthropod MC. MC is important for the population growth for Lycosidae spiders. As a natural enemy against a range of insect pests, the artificial regulation of P. pseudoannulata MC by m-A and its analogues will protect its pulli and promote its effectiveness in the biological control. </p
Pirandello e il brivido dell'eterno
No full textPirandello asserts that «nature uses as an instrument human imagination to carry on its creation’s work». This continuation of creation by the imagination consists in creating something eternal rather than temporal: «the work of art lives forever», Pirandello affirms too. Imagination and art are therefore the spheres where everything is eternal in, where everything is saved from the danger of annihilation. But if everything is eternal, pain is eternal too. In fact the six characters in search of an author are eternal figures and each of them is the emblem of an aspect of pain. The way towards an eternity that can only be desired, as a salvation from the anguish of annihilation, falls in with the obstacle of an eternity that can only be feared, as an eternity of pain. A dark negativity during a luminous way: the most intimate life of Pirandello's drama is here
Application and evaluation of a methodology for candidate technology selection improving product design processes
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Pervietà e limb salvage dei bypass sottoinguinali dopo trattamento endovascolare delle lesioni steno-ostruttive dell’anastomosi distale
No full textMetodi di Rappresentazione della Conoscenza nella Progettazione Assistita
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