636 research outputs found
Some Remarks on the Recent SRM Related Case-Law of the CJEU with Special Regard to the Meroni Doctrine
No full textThe study elaborates on the development of the Meroni doctrine, derived from the Meroni judgment of the Court of Justice of the European Coal and Steel Community under a different Founding Treaty framework and its applicability to the Banking Union under the current Treaty framework. To fulfil this aim, the author first elaborates on the Advocate General’s opinion and the Judgment of the Court of Justice in the Meroni case and then briefly introduces the evolution and the literature on the issue. After a short introduction of the Banking Union’s institutional order, the author introduces two cases in which issues related to the Meroni doctrine were raised before the General Court, as well as the appellate procedures before the Court of Justice in one of these cases
Il sistema di valutazione della sostenibilità ambientale visto attraverso l'ottica del progettista
No full textSustainable management of sea urchins. From resource conservation to aquaculture promotion in a circular economy perspective
No full textSea urchins are among the invertebrates that play a pivotal role in structuring and controlling marine benthic macrophyte communities and can be considered the main grazers in shallow seas around the world. The most studied in Mediterranean Sea is Paracentrotus lividus (Lamarck 1816), since, in addition to being one of the most widespread, it is the one with the greatest commercial interest. Moreover, despite many efforts to start aquaculture processes that cover the entire production cycle of this resource, at present, market demand is almost exclusively based on harvesting, and several examples of depletion of natural stocks due to fishing pressure are reported. However, the decline of P. lividus populations has also been reported in areas like the Ligurian Sea, where the sea urchin is not considered a species of commercial interest. Probably, it is due to the fact that they are very sensitive to indirect anthropogenic impacts: stressors related to climate change and the presence of pollutants can lead to abnormal larval development, reduced survival of larvae and juveniles, and impaired reproductive success of adults due to effects on gamete quality, threatening survival of entire populations.
This study had two main objectives, the first being the characterisation of P. lividus populations at different sites in the Ligurian Sea, in order to investigate their health status (abundance and size distribution) and hypothesise the possible causes of their regression. While the second was the promotion of sustainable sea urchin aquaculture through the formulation of new experimental feeds, enriched with high Mg and Ca content biocarbonates and antioxidant substances. Those components were directly derived from the processing of sea urchins waste from gonad-packing industries, in a circular economy perspective
Artifact-Driven Business Process Monitoring - A Novel Approach to Transparently Monitor Business Processes, Supported by Methods, Tools, and Real-World Applications
No full textThis book proposes a novel technique, named artifact-driven process monitoring, by which multi-party processes, involving non-automated activities, can be continuously and autonomously monitored. This technique exploits the Internet of Things (IoT) paradigm to make the physical objects, participating in a process, smart. Being equipped with sensors, a computing device, and a communication interface, such smart objects can then become self-aware of their own conditions and of the process they participate in, and exchange this information with the other smart objects and the involved organizations. To allow organizations to reuse preexisting process models, a method to instruct smart objects given Business Process Model and Notation (BPMN) collaboration diagrams is also presented. The work constitutes a revised version of the PhD dissertation written by the author at the PhD School of Information Engineering of Politecnico di Milano, Italy. In 2019, the PhD dissertation won the “CAiSE PhD award”, granted to outstanding PhD theses in the field of Information Systems Engineering
Should we increase instruction time in low achieving schools? Evidence from Southern Italy
No full textAbstractThis paper investigates the short term effects of a large scale intervention, funded by the European Social Fund, which provides additional instruction time to selected classes of lower secondary schools in Southern Italy. Selection is addressed using institutional rules that regulate class formation: first year students are divided into groups distinguished by letters, they remain in the same group across grades at the school, and the composition of teachers assigned to groups is stable over time. Using a difference-in-differences strategy, we consider consecutive cohorts of first year students enrolled in the same group. We compare participating groups to non-participating groups within the same school, as well as to groups in non-participating schools. We find that the intervention raised scores in mathematics for students from the least advantaged backgrounds. We also find that targeting the best students with extra activities in language comes at the cost of lowering performance in mathematics. We go beyond average effects, finding that the positive effect for mathematics is driven by larger effects for the best students
Fostering collaboration between start-ups and students for mutually beneficial inspiring learning
No full textThis two-voiced paper is the result of a student-teacher interaction in which the teacher simply paves the floor for a student’s narrative and commentary, from their perspective, of an innovative projectbased studio experience. By partnering with an incubation and start-up program for social innovators in Milan, university faculty considered how to design a studio to stimulate both students and innovators in their different educational and personal trajectories by organising "pairs of teams" with the same design goal(s), conscientious of social innovation, environmental sustainability within a circular economy, and striving for radical solutions. The team for which this student-author is sharing their experience in this paper has been paired with the start-up team “NoLo Ricicla - ilVespaio”, whose innovation idea was based on the question “How could a system of plastic packaging recovery, production and distribution of recycled artefacts be organised on a neighbourhood scale in the neighbourhood of NoLo?
Mutations that impair interaction properties of TRIM32 associated with limb-girdle muscular dystrophy 2H
No full textTRIM32 belongs to a large family of proteins characterized by a tripartite motif, possibly involved in the ubiquitination process, acting as an E3 ligase. In addition, TRIM32 has six NHL repeats with putative interaction properties. A homozygous mutation at the third NHL repeat (D487N) has been found in patients with limb girdle muscular dystrophy 2H (LGMD2H). This mutation was only identified in the inbred Manitoba Hutterite or their descendants. Interestingly, a mutation in the B-box domain of TRIM32 cosegregates with Bardet-Biedl syndrome type 11 (BBS11). The signs of BBS11 include obesity, pigmentary and retinal malformations, diabetes, polydactyly, and no muscular dystrophy, suggesting an alternative disease mechanism. We aim to ascertain whether D487N is the only pathological LGMD2H allele, limited to Hutterites. We studied the TRIM32 gene in 310 LGMD patients with no mutations at the other known loci. We identified four patients with novel mutated alleles. Two mutations were homozygous and missing in controls. These mutations also clustered at the NHL domain, suggesting that a specific (interaction) property might be abolished in LGMD2H patients. No mutations were found at the B-box region where the BBS11 mutation is found. We tested TRIM32 and its mutants by yeast-two-hybrid assay, developing an interaction test to validate mutations. All LGMD2H mutants, but not the BBS11, lost their ability to self-interact. The interaction of TRIM32 mutants with E2N, a protein involved in the ubiquitination process, was similarly impaired. In conclusion, the mutations here reported may cause muscular dystrophy by affecting the interaction properties of TRIM32
One Month of Classic Therapeutic Ketogenic Diet Decreases Short Chain Fatty Acids Production in Epileptic Patients
No full textKetogenic diet (KD), a high fat and very low carbohydrates diet, is used worldwide for the treatment of drug resistant epilepsy but, due to its composition, it might exert an impact on gut health. Even though data of KD effects on intestinal microbiota changes are recently emerging, its influence on the gut environment has been scarcely addressed so far. The aim of this study was to investigate whether 1 month of KD affects the gut environment in epileptic patients, by analyzing short chain fatty acids (SCFA) production and fecal water toxicity. A total of seven patients were enrolled. Stool samples were collected before (T0) and after 1 month of KD (4:1 ketogenic ratio) (T1). SCFA were determined by GC-FID and fecal water toxicity in Caco-2 cell culture by comet assay. Concentrations of SCFA significantly decreased after KD (p < 0.05): in particular, we found a 55% reduction of total SCFA level, a 64% reduction of acetate, 33% of propionate, and 20% of butyrate (p < 0.05). Cytotoxicity of fecal water extracted from stool samples was not significantly altered by diet, while genotoxicity was slightly decreased after KD (p < 0.05). Genotoxicity values were consistent with data previously obtained from a healthy Italian population. The present study suggests that 1 month of KD significantly reduce SCFA production. Since SCFA produced by gut microbiota exert many health promoting effects on either the gut environment or human metabolism, these results open a new branch of investigation into KD effects
Mesoporous silica networks with improved diffusion and interference-rejecting properties for electroanalytical sensing
No full textMesoporous silica materials characterized by well-ordered microstructure and size- and shape-controlled pores have attracted much attention in the last years. These systems can be used for the development of functional thin films for advanced applications in catalysis and electrocatalysis, sensors and actuators, separation techniques, micro- and nano-electronic engineering [1-2].
In this work, “insulating” and mesoporous silica films were prepared by spin coating a home-made silica sol on a cleaned ITO glass support. The mesoporosity was controlled by the use of Polystyrene (PS) latex beads with different dimensions (30-60-100 nm) as template. The number of successive multi-layer depositions was varied (1-2-3-5 layers) and after the template removal, stable, homogeneous and reproducible transparent films were obtained, characterized by an interconnected porous structure. The morphological features and the physicochemical and optical properties of the films and/or sol-precursors were studied by DLS, FE-SEM, AFM, UV-vis transmittance spectroscopy and wettability analyses. Moreover, a deep electrochemical characterization was also performed by Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). In particular, the use of two redox mediator probes [(K4Fe(CN)6) and (Ru(NH3)6Cl3)], presenting opposite charge and different diffusional behaviour, allowed the comprehension of the mass transport and charge transfer phenomena, evidencing the effects of spatial confinement and charge selection.
In the case of “insulating” films prepared without the use of PS latexes, we proved an experimental evidence for theoretical models [3] concerning electroinactive layer-modified electrodes, with a scan-rate-dependent variation of the CV shape due to a progressive increase in the diffusion coefficient inside the insulating layer. A complex balance between diverging effects (higher hydrophilicity and insulating behavior effects of silica) when increasing the numbers of layers was also observed [4].
In the case of mesoporous layers, a better electrochemical response of smaller pores and of thicker layers was found, due to two main cooperative phenomena: i) a diffusion modification from fully planar to radial-convergent at the pore-silica interface due to surface porosity; ii) the presence of pores in a hydrophilic matrix which leads to a capillary pull effects, stronger in the case of smaller hydrophilic pores.
The easiness of preparation and the interesting properties of these devices pave the way towards their use in many fields, particularly trace electroanalysis in real matrices. In fact, for example, the porous and properly charged network is able to exclude interfering macromolecules (mucin in our case), preventing electrode biofouling and enhancing the performances of the sensor towards dopamine detection.
References
[1] M. Ogawa, Chem. Rec. 17 (2017) 217-232.
[2] A. Walcarius, Chem. Soc. Rev. 42 (2013) 4098-4140.
[3] D. Menshykau, R.G. Compton, Langmuir 25 (2009) 2519–2529.
[4] V. Pifferi, L. Rimoldi, D. Meroni, F. Segrado, G. Soliveri, S. Ardizzone, L. Falciola, Electrochem. Commun. 81 (2017) 102-105
Electroanalytical signal amplification and selectivity features of “insulating” and mesoporous solid-templated silica films
No full textMesoporous silica materials characterized by well-ordered microstructure and size- and shape-controlled pores have attracted much attention in the last years. These systems can be used for the development of functional thin films for advanced applications in catalysis and electrocatalysis, sensors and actuators, separation techniques, micro- and nano-electronic engineering [1-2].
In this work, “insulating” and mesoporous silica films were prepared by spin coating a home-made silica sol on a cleaned ITO glass support. The mesoporosity was controlled by the use of Polystyrene (PS) latex beads with different dimensions (30-60-100 nm) as template. The number of successive multi-layer depositions was varied (1-2-3-5 layers) and after the template removal, stable, homogeneous and reproducible transparent films were obtained, characterized by an interconnected porous structure. The morphological features and the physicochemical and optical properties of the films and/or sol-precursors were studied by DLS, FE-SEM, AFM, UV-vis transmittance spectroscopy and wettability analyses. Moreover, a deep electrochemical characterization was also performed by Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). In particular, the use of two redox mediator probes [(K4Fe(CN)6) and (Ru(NH3)6Cl3)], presenting opposite charge and different diffusional behaviour, allowed the comprehension of the mass transport and charge transfer phenomena, evidencing the effects of spatial confinement and charge selection.
In the case of “insulating” films prepared without the use of PS latexes, we proved an experimental evidence for theoretical models [3] concerning electroinactive layer-modified electrodes, with a scan-rate-dependent variation of the CV shape due to a progressive increase in the diffusion coefficient inside the insulating layer. A complex balance between diverging effects (higher hydrophilicity and insulating behavior effects of silica) when increasing the numbers of layers was also observed [4].
In the case of mesoporous layers, a better electrochemical response of smaller pores and of thicker layers was found, due to two main cooperative phenomena: i) a diffusion modification from fully planar to radial-convergent at the pore-silica interface due to surface porosity; ii) the presence of pores in a hydrophilic matrix which leads to a capillary pull effects, stronger in the case of smaller hydrophilic pores.
The easiness of preparation and the interesting properties of these devices pave the way towards their use in many fields, particularly trace electroanalysis in real matrices. In fact, for example, the porous and properly charged network is able to exclude interfering macromolecules (mucin in our case), preventing electrode biofouling and enhancing the performances of the sensor towards dopamine detection.
References
[1] M. Ogawa, Chem. Rec. 17 (2017) 217-232.
[2] A. Walcarius, Chem. Soc. Rev. 42 (2013) 4098-4140.
[3] D. Menshykau, R.G. Compton, Langmuir 25 (2009) 2519–2529.
[4] V. Pifferi, L. Rimoldi, D. Meroni, F. Segrado, G. Soliveri, S. Ardizzone, L. Falciola, Electrochem. Commun. 81 (2017) 102-105
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