La trasmissibilità ostacolata della partecipazione azionaria. Covendita, cambio di controllo, acquisti potestativi totalitari.

L'angolo visuale prescelto in questa indagine è quello della trasmissibilità ostacolata della partecipazione azionaria, vicenda che, ricostruita sulla scorta dell'attuale portata del divieto di alienazione, si snoda su un doppio crinale: quello degli assetti proprietari e quello della negozialità; prendendo le mosse dalle peculiarità che caratterizzano la cessione della partecipazione azionaria totalitaria e di controllo, il lavoro esamina le interferenze che, rispetto a tali fattispecie traslative, determina l'inserimento in statuto di una clausola di accodamento e prosegue con l'analisi delle clausole di change of control. Di queste ultime si tenta di fornire una definizione operativa dal momento che, allo stato, sono oggetto di interesse legislativo soltanto nell'ambito delle società quotate (art. 125- quinquies t.u.f., in tema di loyalty shares) e dell'equity crowdfunding

METS2 Discussion Group 1

Discussion Grou

Vibration Field Problem Resolved with Analytical Diagnostic Approach and Innovative Impeller Design

Case StudyCase Study 20: Several pumps of same design exhibited field vibrations above API limits, dominated by Vane Passage Frequency (VPF). Root cause analysis included both experimental and theoretical paths. Experimental investigation, with shop vibration tests and modal analysis, showed natural frequency of bearing housings at VPF. The theoretical approach, based on mainly hydraulic analysis, pointed out to discharge recirculation as primary cause of hydraulic excitation for high VPF vibrations. The solution was identified with the design of an innovative impeller geometry (5+9 vanes). Shop tests confirmed both overall performance and drastic reduction of vibrations below API limits. Pumps with the innovative impeller were installed in the field confirming reduction of vibrations. Lesson learned: high number of vanes at impeller outlet is a key feature for controlling hydraulic excitation forces, changing both VPF and amplitude

Air quality biomonitoring through Olea europaea L.: The study case of “Land of pyres”

The “Land of pyres”, namely “La Terra dei Fuochi”, is an area of Campania region (South-Italy), highly inhabited and comprises between the Provinces of Naples and Caserta, sadly known worldwide for the criminal activities related to the illegal waste disposal and burning. These fires, concomitantly with traffic emissions, might be the source of potential toxic element (PTE) dangerous for the human health and causing pathologies. In the framework of Correlation Health–Environment project, funded by the Campania region, eight municipalities (of area “Land of pyres”) and three remote sites have been bio-monitored using the olive (Olea europaea L.) plants as biomonitors. Leaves of olive plants were collected in each assayed municipality and the concentration of 11 metal(loid)s was evaluated by means of ICP-OES. Our findings revealed that the air of these municipalities was limitedly contaminated by PTE; in fact, only Sb, Al and Mn were detected in the olive leaves collected in some of the assayed municipalities and showed a high enrichment factors (EC) manly due, probably, to the vehicular traffic emissions. Furthermore, the concentrations of the other assayed PTEs were lower than those of Sb, Al and Mn. For these reasons we suppose that their emissions in the troposphere have been and are limited, and they mainly have a crustal origin. Even if our data are very comforting for those urban area, regarded by many as one of the most contaminated one in Italy, a great environment care, in any case, is always needed

Fast and Ultimate Vibration Field Solution: From Problem Detection to Field Performance Validation

Case Stud

Vibration Field Problem Resolved with Analytical Diagnostic Approach and Innovative Impeller Design

Case StudySeveral pumps of same design exhibited field vibrations above API limits, dominated by Vane Passage Frequency (VPF). Root cause analysis included both experimental and theoretical paths.Experimental investigation , with shop vibration tests and modal analysis, showed natural frequency of bearing housings at VPF. The theoretical approach , based on mainly hydraulic analysis, pointed out to discharge recirculation as primary cause of hydraulic excitation for high VPF vibrations.The solution was identified with the design of an innovative impeller geometry (5+9 vanes). Shop tests confirmed both overall performance and drastic reduction of vibrations below API limits .Pumps with the innovative impeller were installed in the field confirming reduction of vibrations.Lesson learned: high number of vanes at impeller outlet is a key feature for controlling hydraulic excitation forces, changing both VPF and amplitude

Condition Monitoring Systems and Vibrations

Discussion Grou

Interaction Between Rotodynamic Pump Behaviour And Wear Surface Coating Technology: A MULTISTAGE PUMP CASE ANALYSIS

Case Stud

Epigenetic diversity of clonal white poplar (<i>Populus alba</i> L.) populations: could methylation support the success of vegetative reproduction strategy?

The widespread poplar populations of Sardinia are vegetatively propagated and live in different natural environments forming large monoclonal stands. The main goals of the present study were: i) to investigate/measure the epigenetic diversity of the poplar populations by determining their DNA methylation status; ii) to assess if and how methylation status influences population clustering; iii) to shed light on the changes that occur in the epigenome of ramets of the same poplar clone. To these purposes, 83 white poplar trees were sampled at different locations on the island of Sardinia. Methylation sensitive amplified polymorphism analysis was carried out on the genomic DNA extracted from leaves at the same juvenile stage. The study showed that the genetic biodiversity of poplars is quite limited but it is counterbalanced by epigenetic inter-population molecular variability. The comparison between MspI and HpaII DNA fragmentation profiles revealed that environmental conditions strongly influence hemi-methylation of the inner cytosine. The variable epigenetic status of Sardinian white poplars revealed a decreased number of population clusters. Landscape genetics analyses clearly demonstrated that ramets of the same clone were differentially methylated in relation to their geographic position. Therefore, our data support the notion that studies on plant biodiversity should no longer be restricted to genetic aspects, especially in the case of vegetatively propagated plant species