207 research outputs found
Comparison between ovsynch protocol or prostaglandin plus GnRH for fixed time artificial insemination in buffalo cows
No full textGenotoxicity biomarkers in the amphipod Gammarus elvirae exposed in vivo to mercury and lead and basal levels of DNA damage in two cell types
No full textThe present work deals with the application of genotoxicity biomarkers by means of the Comet assay in haemocytes and spermatozoa of the crustacean Gammarus elvirae exposed in vivo to heavy metals. Furthermore, a basal levels (BLs) study of DNA damage in the two cell types considered for two different gammarids species, G. elvirae and Echinogammarus veneris, was carried out. It is important to identify factors that influence the outcome of the assay in order to obtain reliable and reproducible results usable for risk assessment purposes. Our results highlight that the Italian legal limits for Hg and Pb, respectively, 0.5 and 50 μg/L, are inadequate for establishing safety thresholds in the aquatic environment. Furthermore, the freshwater invertebrate G. elvirae, used for the first time to measure the effect of genotoxicants, is a good candidate for evaluating the genotoxicity damage induced by heavy metals. Our results concerning spermatozoa show excessively variable responses and high BLs
STUDIO PRELIMINARE DI FATTIBILITÀ PER TRATTAMENTI DI RADIOCHIRURGIA TRAMITE PROTONI PER L’ABLAZIONE CARDIACA DELLA TACHICARDIA VENTRICOLARE
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Junction with tunable current–voltage characteristics: n-doped Si/poly(vinyl chloride)–poly(dithienopyrrole) composite
No full textA device was realized by interfacing the rectifying junction silicon/poly(vinyl chloride)-poly(dithienopyrrole) composite with a second lithium electrode through a polymer gel. The purpose was to tune the characteristics of the junction by changing the potential delivered to the polymer, Current-voltage plots of the junction were recorded at different voltages applied between the polymer and the lithium electrode; preliminary results indicate a variation of the current-voltage characteristics by changing the polymer potential; in particular, an increase of the reverse saturation current and a decrease of the series resistance by increasing the oxidation level of the polymer were observed
Electrochemical Characterization of a Composite Polymer Electrolyte with Improved Lithium Metal Electrode Interfacial Properties
No full textIn the development of rechargeable lithium polymer batteries it is of paramount importance to control the passivation phenomena occurring at the lithium electrode interface. It is well estabilished that the type and the growth of the lithium passivation layer is unpredictably influenced by the presence of liquid components and/or impurities in the electrolyte. Therefore, one approach to improve the stability of the lithium interface is the use of liquid-free, highly pure electrolytes. The electrochemical properties of a composite polymer electrolyte obtained by hot pressing a mixture of polyethylene oxide (PEO), a lithium salt (lithium tetrafluoroborate, LiBF(4)) and a powdered ceramic additive (gamma-LiAlO(2)), will be presented and discussed. The electrochemical characterization included the determination of the ionic conductivity, the anodic break-down voltage and, most importantly, the stability of the lithium metal electrode interface and the lithium stripping-plating process efficiency. The main feature of this dry, true solid-state electrolyte is a very good compatibility with the lithium metal electrode, demonstrated by a very high lithium cycling efficiency, which approaches a value of 99%
Transport and interfacial properties of composite polymer electrolytes
No full textLithium polymer electrolytes formed by dissolving a lithium salt LiX in poly(ethylene oxide) PEG, may find useful application as separators in lithium rechargeable polymer batteries. The main problems, which are still to be solved for a complete successful operation of these materials, are the reactivity of their interface with the lithium metal electrode and the decay of their conductivity at temperatures below 70 degrees C. In this paper we demonstrate that a successful approach for overcoming these problems, is the dispersion of selected ceramic powders in the polymer mass, with the aim of developing new types of composite PEO-LiX polymer electrolytes characterized by enhanced interfacial stability, as well as by improved ambient temperature transport properties. (C) 2000 Elsevier Science Ltd. All rights reserved
Effect of synchronization of ovulation with GnRH or hCG on fertility of dairy cow during the hot and cold period of the year.
No full textL’alternativa tra responsabilità oggettiva e colpa in attività illecita per l’imputazione della conseguenza ulteriore non voluta, alla luce della sentenza Ronci delle Sezioni Unite sull’art. 586 c.p.
No full text1. Introduzione: le ipotesi problematiche. - 2. Le possibili soluzioni per l’imputazione della conseguenza ulteriore non voluta del reato-base doloso. - 3. Prima soluzione: il dolus indirectus. - 4. Seconda soluzione: la responsabilità oggettiva secondo la logica del versari in re illicita. - 4.1. Le ragioni del ‘successo’ della responsabilità oggettiva. - 4.2. Prime reazioni critiche alla responsabilità oggettiva. - 4.3. La responsabilità oggettiva in Italia fino al 1988. - 5. Terza soluzione: la colpa specifica per violazione di legge penale. - 6. Quarta soluzione: la responsabilità oggettiva come responsabilità da rischio illecito. - 7. Quinta soluzione: la colpa (concepita ed accertata nei suoi requisiti ordinari). - 7.1. Le indicazioni interpretative fornite dalla giurisprudenza costituzionale. - 7.2. La soluzione ‘costituzionalmente orientata’ accolta dalla sentenza Ronci. - 8. È davvero possibile concepire una colpa in attività illecita? - 8.1. Prima obiezione: “la contradizion che nol consente” – esposizione e replica. - 8.2. Seconda obiezione: l’irreperibilità di un agente-modello in un contesto illecito – esposizione e replica. - 9. Ulteriori conferme alla colpa in attività illecita. - 10. Si scrive “colpa”, ma si legge “responsabilità oggettiva”? - 10.1. Primo campanello d’allarme: la colpa per violazione di legge penale. - 10.2. Secondo campanello d’allarme: l’impoverimento contenutistico della colpa in attività illecita in alcune pronunce giurisprudenziali. - 10.3. Terzo campanello d’allarme: la deludente prassi giurisprudenziale tedesca ed austriaca. - 11. Come garantire appieno la capacità di rendimento della colpa in attività illecita? - 12. Colpa in attività illecita – dalle parole ai fatti: a) in relazione all’ipotesi di morte del cessionario di sostanze stupefacenti. - 13. (Segue): b) in relazione ad altre ipotesi di conseguenza non voluta. - 14. Considerazioni sul quantum della pena: “nessuna pena più grave senza colpevolezza più grave”. - 15. Dopo la sentenza Ronci: possibili sviluppi. - 16. Conclusione
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