1,017 research outputs found
Rhyothemis phyllis phyllis (Sulzer
No full text9.Rhyothemis phyllis phyllis (Sulzer). Libellula phyllis Sulzer, Abgekurzte Gesch. cler Ins., 169, pl. 24, fig. 2, 1776. Rhyotheniis Phyllis (Sulzer) Hagen, Stett. Ent. Zeitung 28: 232, 1867. Rhyothemis Phyllis Phyllis (Sulzer) Fraser, Bombay Nat. Hist. SooJour. 26: 931, fig. 52, 1920; Fauna Brit. Incl., Odon. 3: 421, 1936. Agana swamp, May 4, Bryan, Usinger, May 25, Swezey; swamp 3 miles south of Piti, May 23, Usinger; Inarajan, June 8, Usinger. This species occurs in Burma, Java, Sumatra, and Borneo. Now recorded for the first time in Guam, where it was found in swampy regions but not common.Published as part of SWEZEY, O. H. & WILLIAMS, F. X., 1942, ODONATA, DRAGONFLIES OF GUAM, pp. 3-6 in Insects of Guam I, Honolulu, Hawaii :Bernice P. Bishop Museum, Bulletin 172 on page 5, DOI: 10.5281/zenodo.515951
Nicolas-Frédéric de Mulinen : Ancien Envoyer de la Ville et République de Berne
No full textSulzer pinx. ; P. Elie Bovet del
Alain Claude Sulzer: Täydellinen tarjoilija
No full textArvostelu teoksesta Alain Claude Sulzer: Täydellinen tarjoilija, suom. Olli Sarravaara, Lurra Editions, 2016.nonPeerReviewe
Proinsecticides effective against insecticide-resistant peach-potato aphid (Myzus persicae (Sulzer))
No full textA range of potential proinsecticides was synthesised and tested against insecticide-susceptible and -resistant clones of Myzus persicae (Sulzer). They were all esters of compounds known to be toxic or pharmacologically active, and were designed to have increased lipophilicity and to be subject to more rapid activation by hydrolysis in resistant than in susceptible aphids due to the increased amount of esterase present in the resistant clones. The most potent toxins were esters of monofluoroacetic acid. When applied topically, the toxicity of these esters to M. persicae was directly proportional to the esterase content of the aphids. Such compounds would not be suitable as commercial insecticides, but the results serve to illustrate the potential benefits of exploiting a resistance mechanism against one class of compounds to render another class more toxic, i.e. to design compounds that show negative cross-resistance. (C) 1998 SCI
Ventilation Efficiency Measurements in Sulzer Test Chamber
No full textMeasurements ith tracer gases were performed, together with more classical temperature and air velocity measurements, on various ventilation systems installed in the test chamber of Sulzer Infra, in Winterthur. The test chamber was arranged to simulate an office room, with heat generated form computers and occupants, Moreover, the contaminants from one occupant was simulated with a tracer gas. This document addresses the measurement of the age of the air and of the contaminant removal effectiveness at various locations.LESO-P
Sulzer, Johann Georg (1720–1779)
No full textSchütze SB. Sulzer, Johann Georg (1720–1779). In: Horn K-P, Kemnitz H, Marotzki W, Sandfuchs U, eds. Klinkhardt Lexikon Erziehungswissenschaft (KLE), Bd. 3. 1st ed. Bad Heilbrunn: Klinkhardt; 2011: 287-288
Field-simulator study of insecticide resistance conferred by esterase-, MACE- and kdr-based mechanisms in the peach-potato aphid, Myzus persicae (Sulzer)
No full textInsecticide sprays were applied to Myzus persicae (Sulzer) populations carrying various combinations of three insecticide resistance mechanisms (esterase-based metabolic resistance and two target site mechanisms, known as MACE and kdr), supported on host plants growing in field simulator cages. The study showed that MACE confers extreme resistance to pirimicarb and triazamate (carbamate insecticides) but not to deltamethrin + heptenophos (16 + 1) (Decisquick) or dimethoate (an organophosphorus insecticide). Resistance to dimethoate depends solely on levels of esterase-based resistance, while resistance to Decisquick depends on kdr and esterase. None of the four insecticides is effective against aphids carrying MACE combined with extreme esterase-based resistance. This knowledge, in association with current monitoring of the mechanisms, will play an important role in making decisions on insecticide use against M persicae in the UK. (C) 1999 Society of Chemical Industry
Optimum time to refurbish a boiler feed pump at Eskom's power stations
No full textA key focus area in power generation today is to improve equipment and plant efficiency, with this study specifically aimed to determine the optimum time to refurbish a boiler feed pump by analysing the internal wear of the annular seals. The boiler feed pump (BFP) installed in a power station is either driven by a steam turbine or an electric motor and the BFP is the highest auxiliary power consumer within the power station. In the 13 Eskom generating fossil fired power stations the installed BFPs consume approximately 1000 MWs of auxiliary power continuously. The focus of the study is to understand how the BFPs efficiency changes with time as a result of increased internal clearances and the effect this has on the auxiliary power consumption. An in-depth analysis of the efficiency degradation has been studied to understand the contributing factors to these changes and specifically the change in leakage rate and friction in the annular seals of the impellers and axial thrust balancing devices
Assessment of the broca-sulzer phenomenon via inter- and intra-modality matching procedures : studies of signal-light brightness.
No full textSignal lights are presented to an observer as flashes with finite duration; thus, the effect of flash duration on the apparent brightness of the signal is important. The relation of effective signal brightness to flash duration and luminance finds expression in the Broca-Sulzer phenomenon. This study was concerned with the effect of method of measuring brightness and with the effect of adaptive state of the eye on the Broca-Sulzer phenomenon.Subjects adjusted the luminance of test flashes 1 to 1000 msec. in duration to match either the loudness of a 500 msec. comparison tone (1000 Hz) or the brightness of a 500 msec. comparison flash. Comparison tone loudness were 75, 86, and 97 dB. Comparison flash luminances were 10, 100, and 1000 mL. In the light-adapted condition, a 1.5 sec. adapting flash was presented 2.5 sec. before the comparison flash. No adapting flash was presented in the dark-adapted condition. The Broca-Sulzer effect appeared only with the highest comparison stimulus intensities in both crossmodality matching and brightness matching conditions.This finding conflicts with the hypothesis that the Broca-Sulzer effect is obtained only when the procedure for measuring brightness involves a visual comparison stimulus. An interaction found between method of measuring brightness and adaptive state was also discussed. The findings are pertinent to the prediction of effective brightness of a signal since, under some conditions, apparent brightness does not increase steadily with increased duration but, rather, evidences a peaking effect
African literature to-day
No full textBeing interested in African literature one seems to swim from the very beginning in a terminological maelstrom. What is African literature? Is it literature written by any African author in any language? That would mean approaching the question from a purely racial basis. It would imply the art of demonstrating that any piece of such literature could infallibly be recognised as African, a thing which, as far as I know has never been done. Or is African literature strictly bound to traditional African culture
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