1,721,319 research outputs found
Antitumor metabolites of fungi
No full textThe exploitation of the antitumor properties of fungal secondary metabolites is one of the fundamental objectives pursued by a multiplicity of research groups and laboratories working on the characterization of natural products worldwide. The availability of a synthetic framework on such a vast interdisciplinary topic can enhance the current knowledge by supporting novel findings, and stimulating further insights. This paper offers an overview of the state-of-the-art concerning this category of compounds and their occurrence, selection, structural diversity and mechanisms of action on tumor cells
Bioactive compounds from marine-derived aspergillus, penicillium, talaromyces and trichoderma species
No full textThe impact of bioactive compounds from natural sources on human life, particularly in pharmacology and biotechnology, has challenged the scientific community to explore new environmental contexts and the associated microbial diversity. [...]
Traffic Controllers and ships Pilots training in marine ports environments
No full textThis paper deals with the Traffic Controllers and ships Pilots training in marine ports environments. A survey of the state of the art in this area is presented; in addition two simulators (a ship bridge simulator and a control tower simulator) part of an ongoing research project at University of Calabria are briefly described. The ship bridge simulator and the control tower simulator share the same virtual environment and an initial description of both simulators and their implementation is reported
Le funzioni esecutive nel ritardo mentale e nelle difficoltà di apprendimento
No full textAttraverso l'utilizzo di un particolare tipo di doppio compito nel quale i soggetti dovevano emettere due differenti risposte a due differenti caratteristiche dello stesso stimolo, è stato studiato il funzionamento dell'Esecutivo Centrale in soggetti con ritardo mentale (R.M.) e con difficoltà di apprendimento (D.A.). In un compito di discriminazione spaziale di stimoli visivi, il confronto tra i tempi di reazione (TR) nella condizione di compito singolo e nella condizione di compito doppio ha evidenziato un ritardo delle risposte emesse nella condizione di compito doppio in entrambi i gruppi testati. Tale ritardo è risultato significativamente maggiore di quello osservato nei gruppi di controllo. La differenza viene attribuita ad un parziale deficit nel funzionamento dell'Esecutivo Centrale che, nel compito studiato, pianifica la “sequenzializzazione” dell’emissione di più risposte
Influence Of Orifice Distribution On The Thermal And Static Properties Of Hybridly Lubricated Bearings
No full textTilting-pad journal bearings with multiple orifices hybrid lubrication are analysed by means of a thermohydrodynamic theory. Adiabatic boundary conditions are adopted, and a bidimensional model is used to represent the fluid flow behavior in the bearing gap. The influence of operational conditions on the temperature distribution, when different bore arrangements in the pads are used, is discussed and compared to the theoretical values coming from the conventional hydrodynamic case (without radial oil injection). © 2001 Elsevier Science Ltd. All rights reserved.38Out/1320692081Brockwell, K., Dmochowski, W., Thermal effects in the tilting pad journal bearing (1992) J. Phys. Appl. Phys, 25 (PART D), pp. 384-392Dowson, D., A generalized reynolds equation for fluid film lubrication (1962) Int. J. Mech. Sci, 4, pp. 159-170Ettles, C.M.McC., The analysis and performance of pivoted pad journal bearings considering thermal and elastic effects (1980) ASME J. Lubricat. Technol, 102, pp. 182-192Fillon, M., Khonsari, M., Thermohydrodynamic design charts for tilting-pad journal bearings (1996) ASME J. Tribol, 118, pp. 232-238Flack, R.D., Zuck, C.J., Experiments on the stability of two flexible rotor in tilting-pad (1988) J. Bear. Tribol. Trans, 31 (2), pp. 251-257Heshmat, H., Pinkus, O., Mixing inlet temperatures in hydrodynamic bearings (1986) ASME J. Tribol, 108, pp. 231-248Jones, G.J., Martin, F.A., Geometry effects in tilting pad journal bearings (1979) ASLE Trans, 22 (3), pp. 227-244Santos, I.F., (1993) Active Tilting-Pad Journal Bearings: Theory and Experiment, 11, p. 189. , VDI Verlag, Dusseldorf, (in German)Santos, I.F., Nicoletti, R., Self-excited vibrations in active hydrodynamic bearings (1996) RBCM J. Braz. Soc. Mech. Sci, 3, pp. 263-272Santos, I.F., Nicoletti, R., THD analysis in tilting-pad journal bearings with hybrid lubrication (1998) ASME J. Tribol, 121 (4), pp. 892-900Santos, I.F., Russo, F.H., Tilting-pad journal bearings with electronic radial injection (1998) ASME J. Tribol, 120 (3), pp. 583-594Santos, I.F., Scalabrin, A., Control design for active lubrication with theoretical and experimental examples (2000) ASME/IGTI 2000 Gas Turbines Conference and Exposition, , Munich/Germany, May 1-5 2000 in pressTanigushi, S., Makino, T., Takeshita, K., Ichimura, T., A thermohydrodynamic analysis of large tilting-pad journal bearing in laminar and turbulent flow regimes with mixing (1990) ASME J. Tribol, 112, pp. 542-548Ulbrich, H., Althaus, J., Actuator design for rotor control (1989) Twelth Biennal ASME Conf. Vibr. Noise, pp. 17-22. , Montreal/Canad
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
1H-Indazoles as Synthetic Auxiliaries for the Synthesis of Secondary Aromatic Amines.
No full textMethodology of alkylation of aromatic amines using 1H-indazoles as
synthetic auxiliaries is reported
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