32 research outputs found

    SND@LHC: The Scattering and Neutrino Detector at the LHC

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    SND@LHC is a compact and stand-alone experiment designed to perform measurements with neutrinos produced at the LHC in the pseudo-rapidity region of 7.2<η<8.4{7.2 < \eta < 8.4}. The experiment is located 480 m downstream of the ATLAS interaction point, in the TI18 tunnel. The detector is composed of a hybrid system based on an 830 kg target made of tungsten plates, interleaved with emulsion and electronic trackers, also acting as an electromagnetic calorimeter, and followed by a hadronic calorimeter and a muon identification system. The detector is able to distinguish interactions of all three neutrino flavours, which allows probing the physics of heavy flavour production at the LHC in the very forward region. This region is of particular interest for future circular colliders and for very high energy astrophysical neutrino experiments. The detector is also able to search for the scattering of Feebly Interacting Particles. In its first phase, the detector will operate throughout LHC Run 3 and collect a total of 250 fb1\text{fb}^{-1}

    Identification of a component of the trail pheromone of the ant Pheidole pallidula (Hymenoptera: Formicidae)

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    The poison gland of minor workers of P.pallidula.Nyl. contains 3-ethyl-2,5-dimethylpyrazine which induces trail-following in other workers, but does not account for the full trail-following effect of one worker's poison gland. No pyrazines were detected in major workers and their glands do not contain the pheromone.CI:0.85FLWNAinfo:eu-repo/semantics/publishe

    Communication In The Migratory Termite-hunting Ant Pachycondyla ( = Termitopone) Marginata (formicidae, Ponerinae)

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    The Neotropical species Pachycondyla marginata conducts well-organized predatory raids on the termite species Neocapritermes opacus and frequently emigrates to new nest sites. During both activities the ants employ chemical trail communication. The trail pheromone orginates from the pygidial gland. Among the substances identified in the pygidial gland secretions, only citronellal was effective as a trail pheromone. Isopulegol elicited an increase in locomotory activity in the ants and may function as a synergist recruitment signal. The chemical signal is enhanced by a shaking display performed by the recruiting ant.17814753Attygalle, A.B., Vostrowsky, O., Bestmann, H.J., Steghaus-Kovac, S., Maschwitz, U., (3R. 4S)-4-methyl-3-heptanol, the trail pheromone of the ant Leptogenys diminuta (1988) Naturwissenschaften, 75, pp. 315-317Attygalle, A.B., Steghaus-Kovak, S., Ahmad, V.U., Maschwitz, U., Vostrowsky, O., Bestmann, H.J., Cis-Isogeraniol. a recruitment pheromone of the ant Leptogenys diminuta (1991) Naturwissenschaften, 78, pp. 90-92Hölldobler, B., The chemistry of social regulation: Multicomponent signals in ant societies (1995) Proc Nat Acad Sci USA, 92, pp. 19-22Hölldobler, B., Traniello, J.F.A., The pygidial gland and chemical recruitment communication in Pachycondyla ( = Termitopone) laerigata (1980) J Chem Ecol, 6, pp. 883-893Hölldobler, B., Wilson, E.O., (1990) The Ants, , Belknap-Press of Harvard University Press, Cambridge, Ma, USA and Springer Heidelberg, LondonHölldobler, B., Wilson, E.O., (1994) Journey to the Ants, , Belknap-Press of Harvard University Press, Cambridge, Ma, USAHölldobler, B., Obermayer, M., Wilson, E.O., Communication in the primitive cryptobiotic ant Prionopelta amabilis (Hymenoptera: Formicidae) (1992) J Comp Physiol A, 170, pp. 9-16Hölldobler, B., Braun, U., Gronenberg, W., Kirchner, W., Peeters, C., Trail communication in the ant Megaponera foetens (Fabr) (Formicidae, Ponerinae) (1994) J Insect Physiol, 40, pp. 585-593Janssen, E., Bestmann, H.J., Hölldobler, B., Kern, F., N N-Dimethyl uracil and actinidine, two pheromones of the ponerine ant Megaponera foetens (Hymenoptera: Formicidae) J Chem Ecol, , in pressKempf, W.W., Catálogo abreviado das formigas da Região Neotropical (Hymenoptera: Formicidae) (1972) Studia Entomologica, n.s., 15, pp. 3-344Kern, F., Bestmann, H.J., Antennal electrophysiological responsiveness of the ponerine ant Leptoyenys diminuta to trail and recruitment pheromones and its structure analogs (1993) Naturwissenschaften, 80, pp. 424-427Leal, J.R., Oliveira, P.S., Behavioral ecology of the neotropical termite-hunting ant Pachycondyla ( = Termitopone) marginata: Group-raiding and migratory patterns (1995) Behav Ecol Sociobiol, , in pressMaschwitz, U., Schönegge, P., Recruitment gland of Leptogenys chinensis (1977) Naturwissenschaften, 64, pp. 589-590Maschwitz, U., Steghaus-Kovac, S., Individualismus versus Kooperation: Gegensätzliche Jagd- Und Rekrutierungs-strategien bei tropischen Ponerinen (Hymenoptera: Formicidae) (1991) Naturwissenschaften, 78, pp. 103-113Mill, A.E., Emigration of a colony of the giant termite hunter, Pachycondyla commutata (Roger) (Hymenoptera. Formicidae) (1982) Entomol Mon Mag, 118, pp. 243-245Mill, A.E., Predation by the ponerine ant Pachycondyla commutata on termites of the genus Syntermes in Amazonian rain forest (1984) J Nat Hist, 18, pp. 405-410Morgan, E.D., Wadhams, L.J., Gas chromatography of volatile compounds in small samples of biological materials (1972) J Chromatogr Sci, 10, pp. 528-529Oldham, N.J., Morgan, E.D., Gobin, B., Billen, J., First identification of a trail pheromone of an army ant (Aenictus species) (1994) Experientia, 50, pp. 763-765Oliveira, P.S., Hölldobler, B., Orientation and communication in the Neotropical ant Odontomachus bauri Emery (Hymenoptera, Formicidae, Ponerinae) (1989) Ethology, 83, pp. 154-166Tomalski, M.D., Blum, M.S., Jones, T.H., Fales, H.M., Howard, D.F., Passera, L., Chemistry and functions of exocrine secretions of the ant Tapinoma melanocephalum and T. erraticum (1987) J Chem Ecol, 13, pp. 253-263Wheeler, W.M., Ecological relations of ponerine and other ants to termites (1936) Proc Am Acad Arts Sci, 71, pp. 159-243Wheeler, J.W., Olagbemiro, T., Nash, A., Blum, M.S., Actinidine from the defensive secretions of dolichoderine ants (1977) J Chem Ecol, 3, pp. 241-244William, F., Erman, S., (1985) Studies in Organic Chemistry Vol. II. Chemistry of MonoterpenesHandbook Part A, 2. , Marcel Dekker, INC, New York, Base
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