Effetto di diverse intensità di defogliazione e ombreggiamento precoci sulla compattezza del grappolo, le componenti della produzione, la composizione dell’acino e le caratteristiche sensoriali del vino nel vitigno ‘Greco’

In viticoltura, la defogliazione in pre-antesi è una pratica di potatura verde impiegata per ridurre la compattezza del grappolo e quindi per diminuire la sua suscettibilità ad attacchi di marciumi durante le fasi finali della maturazione. Questa pratica può inoltre modificare il micro-clima nei dintorni del grappolo e ciò può avere effetti significativi sulla composizione dell’acino. È possibile però ipotizzare che gli effetti della defogliazione in pre-antesi sia sull’allegagione che sulla composizione degli acini siano una funzione della quantità di area fogliare rimossa con questa operazione di potatura verde. L’obiettivo di questo studio era di studiare l’effetto di diversi livelli di defogliazione e ombreggiamneto in pre-antesi sulla compattezza del grappolo, la produzione e la composizione dell’uva del vitigno Greco. Il disegno sperimentale ha confrontato i seguenti nove trattamenti: quattro trattamenti di defogliazione, che prevedevano, rispettivamente, la rimozione delle foglie presenti nei primi 15, 30, 45 e 60 cm alla base dei germogli, quattro di ombreggiamento ed un controllo, non sottoposto ad alcuna defogliazione. I trattamenti sono stati applicati in fase fenologica di pre-fioritura (fase H). Dall’allegagione alla raccolta sono state misurate la crescita e la composizione dell’acino (diametro, peso fresco e secco degli acini; contenuto in solidi solubili, pH e acidità titolabile della polpa). Inoltre in diverse date sono state eseguite stime della superficie fogliare per pianta, misure di fotosintesi e di temperatura dei grappoli e valutata la loro compattezza. Alla raccolta è stata inoltre misurata la produzione per pianta. Le defogliazioni hanno determinato una significativa diminuzione della superficie fotosintetizzante per pianta. Inoltre nelle prime due settimane dopo l’applicazione dei trattamenti il tasso fotosintetico per unità di area fogliare è risultato minore nei trattamenti esposti a defogliazione più intensa rispetto agli altri trattamenti. Tali differenze nell’area fogliare e nel tasso fotosintetico si sono tradotte in differenze significative tra i trattamenti nella percentuale di allegagione e nella compattezza del grappolo alla raccolta. Il controllo ha presentato un’allegagione pari a circa 53%, mentre i trattamenti di defogliazione hanno mostrato valori progressivamente decrescenti in funzione dell’intensità dei trattamenti. Il peso secco dell’acino alla raccolta è risultato minore nelle piante sottoposte a defogliazione rispetto alle piante controllo. Alla raccolta il numero di grappoli per pianta non ha presentato differenze significative tra i trattamenti, mentre il peso medio del grappolo e la produzione per pianta hanno mostrato valori maggiori per il controllo e progressivamente decrescenti all’aumentare dell’intensità di defogliazione. Alla raccolta l’acidità titolabile è risultata significativamente minore nelle piante sottoposte a defogliazione più intensa rispetto agli altri trattamenti

Nucleation, reorganization and disassembly of an active network from lactose-modified chitosan mimicking biological matrices

Developing synthetic materials able to mimic micro- and macrorheological properties of natural networks opens up to novel applications and concepts in materials science. The present contribution describes an active network based on a semi-synthetic polymer, a lactitol-bearing chitosan derivative (Chitlac), and a transient inorganic cross-linker, boric acid. Due to the many and diverse anchoring points for boric acid on the flanking groups of Chitlac, the cross-links constantly break and reform in a highly dynamic fashion. The consequence is a network with unusual non-equilibrium and mechanical properties closely resembling the rheological behavior of natural three-dimensional arrangements and of cytoskeleton. Concepts like network nucleation, reorganization and disassembly are declined in terms of amount of the cross-linker, which acts as a putative motor for remodeling of the network upon application of energy. The out-of-equilibrium and non-linear behavior render the semi-synthetic system of great interest for tissue engineering and for developing in-vitro mimics of natural active matrices

Metacognition in schizophrenia: A practical overview of psychometric metacognition assessment tools for researchers and clinicians

Metacognition refers to the cognitive ability to control, monitor and modulate cognitive processes thus guiding and orienting behavior: a continuum of mental activities that ranges from more discrete ones, such as the awareness of the accuracy of others’ judgment, to more integrated activities, such as the knowledge of cognitive processes. Metacognition impairment in schizophrenia, which is considered a core feature of the illness, has become a growing research field focusing on a wide range of processes including reasoning, autobiographical memory, memory biases, cognitive beliefs and clinical insight. There is a well-established relationship between metacognition and schizophrenia symptoms severity, as well as between impaired metacognitive functioning and specific symptomatic sub-domains, such as positive symptoms, negative symptoms, or disorganization. The development of specific cognitive-derived psychotherapies for metacognitive deficits in schizophrenia has been ongoing in the last years. Although sharing a metacognitive feature, these treatments focus on different aspects: false or unhelpful beliefs for metacognitive therapy; cognitive biases for metacognitive training; schematic dysfunctional beliefs for cognitive behavioral therapy (CBT) for psychoses; metacognitive knowledge and sense of identity for MERIT; interpersonal ideas or events triggering delusional thinking for MIT-P. This article reviews the instruments designed to assess metacognitive domains and functions in individuals with schizophrenia, providing mental health professionals with an overview of the heterogeneous current scenario ranging from self-administered scales to semi-structured interviews, which are supported by a variety of theoretical frameworks. Future directions may address the need for more specific and refined tools, also able to follow-up psychotherapeutic-induced improvements

Biodegradable mulching spray for weed control in the cultivation of containerized ornamental shrubs

Abstract Background Weed control represents a major issue in plant cultivation in containers. Manual weed control is very expensive and the use of chemical herbicide or plastic mulch films has a large environmental impact. The aim of this study was to test the efficacy of an experimental biodegradable chitosan-based mulching spray in controlling weed growth in containers. This research also studied the effect of this mulch on the growth of Viburnum lucidum Mill. plants to test for possible phytotoxic effects. Results The study compared a total of six treatments derived from three types of weed control (no weed control; herbicide, oxadiazon; mulching spray) applied in containers either filled only with the sterile substrate or filled with the sterile substrate and then artificially inoculated with seeds of the weed species [Sonchus asper (L.) Hill subsp. asper and Epilobium montanum L.]. The mulch controlled the weeds effectively for more than 2 months after its application even under severe weed infestation. The mulching spray controlled the emergence of S. asper more efficiently than E. montanum plants, probably because the latter has a stronger capacity to penetrate the mulch film during emergence. Conclusions Three months after its application, the mulch started to degrade and this allowed some weeds to emerge in the containers, but, in general, the mulch performed better than the herbicide. The chitosan-based mulch did not have any negative effective on the growth of V. lucidum plants

A method for using monthly average temperatures in phenology models for grapevine (Vitis vinifera L.)

In recent years, there have been increasing efforts to link phenology models with seasonal climate predictions in so-called Decision Support Systems (DSS) to tailor crop management strategies. However, temporal discrepancies between phenology models with temperature data gathered on a daily basis and seasonal forecasting systems providing predictability on monthly scales have limited their use. In this work, we present a novel methodology to use monthly average temperature data in phenology models. Briefly stated, we modelled the timing of the appearance of specific grapevine phenological phases using monthly average temperatures. To do so, we computed the cumulative thermal time (Sf) and the number of effective days per month (effd). The effd is the number of days in a month on which temperatures would be above the minimum value for development (Tb). The calculation of effd is obtained from a normal probability distribution function derived from historical weather records. We tested the methodology on four experimental plots located in different European countries with contrasting weather conditions and for four different grapevine cultivars. The root mean square deviation (RMSD) ranged from 4 to 7 days for all the phenological phases considered, at all the different sites, and for all the cultivars. Furthermore, the bias of observed vs predicted comparisons was not significantly different when using either monthly mean or daily temperature values to model phenology. This new methodology, therefore, provides an easy and robust way to incorporate monthly temperature data into grapevine phenology models.info:eu-repo/semantics/publishedVersio

Transthoracic coronary flow reserve and dobutamine derived myocardial function: a 6-month evaluation after successful coronary angioplasty

After percutaneous transluminal coronary angioplasty (PTCA), stress-echocardiography and gated single photon emission computerized tomography (g-SPECT) are usually performed but both tools have technical limitations. The present study evaluated results of PTCA of left anterior descending artery (LAD) six months after PTCA, by combining transthoracic Doppler coronary flow reserve (CFR) and color Tissue Doppler (C-TD) dobutamine stress. Six months after PTCA of LAD, 24 men, free of angiographic evidence of restenosis, underwent standard Doppler-echocardiography, transthoracic CFR of distal LAD (hyperemic to basal diastolic coronary flow ratio) and C-TD at rest and during dobutamine stress to quantify myocardial systolic (S(m)) and diastolic (E(m )and A(m), E(m)/A(m )ratio) peak velocities in middle posterior septum. Patients with myocardial infarction, coronary stenosis of non-LAD territory and heart failure were excluded. According to dipyridamole g-SPECT, 13 patients had normal perfusion and 11 with perfusion defects. The 2 groups were comparable for age, wall motion score index (WMSI) and C-TD at rest. However, patients with perfusion defects had lower CFR (2.11 ± 0.4 versus 2.87 ± 0.6, p < 0.002) and septal S(m )at high-dose dobutamine (p < 0.01), with higher WMSI (p < 0.05) and stress-echo positivity of LAD territory in 5/11 patients. In the overall population, CFR was related negatively to high-dobutamine WMSI (r = -0.50, p < 0.01) and positively to high-dobutamine S(m )of middle septum (r = 0.55, p < 0.005). In conclusion, even in absence of epicardial coronary restenosis, stress perfusion imaging reflects a physiologic impairment in coronary microcirculation function whose magnitude is associated with the degree of regional functional impairment detectable by C-TD

Acute Delta Hepatitis in Italy spanning three decades (1991–2019): Evidence for the effectiveness of the hepatitis B vaccination campaign

Updated incidence data of acute Delta virus hepatitis (HDV) are lacking worldwide. Our aim was to evaluate incidence of and risk factors for acute HDV in Italy after the introduction of the compulsory vaccination against hepatitis B virus (HBV) in 1991. Data were obtained from the National Surveillance System of acute viral hepatitis (SEIEVA). Independent predictors of HDV were assessed by logistic-regression analysis. The incidence of acute HDV per 1-million population declined from 3.2 cases in 1987 to 0.04 in 2019, parallel to that of acute HBV per 100,000 from 10.0 to 0.39 cases during the same period. The median age of cases increased from 27 years in the decade 1991-1999 to 44 years in the decade 2010-2019 (p &lt; .001). Over the same period, the male/female ratio decreased from 3.8 to 2.1, the proportion of coinfections increased from 55% to 75% (p = .003) and that of HBsAg positive acute hepatitis tested for by IgM anti-HDV linearly decreased from 50.1% to 34.1% (p &lt; .001). People born abroad accounted for 24.6% of cases in 2004-2010 and 32.1% in 2011-2019. In the period 2010-2019, risky sexual behaviour (O.R. 4.2; 95%CI: 1.4-12.8) was the sole independent predictor of acute HDV; conversely intravenous drug use was no longer associated (O.R. 1.25; 95%CI: 0.15-10.22) with this. In conclusion, HBV vaccination was an effective measure to control acute HDV. Intravenous drug use is no longer an efficient mode of HDV spread. Testing for IgM-anti HDV is a grey area requiring alert. Acute HDV in foreigners should be monitored in the years to come

Per Peppino De Filippo attore e autore

Nell’avvertenza "Al lettore", premessa alla raccolta "Farse e Commedie", si può ammirare un noto autoritratto: «Io, Peppino De Filippo, uomo, voglio presentarvi Peppino attore-autore perché meglio di me, vi assicuro, nessuno lo conosce». Le opere teatrali di Peppino richiedono l’avvio di un’adeguata “stagione filologica” in cui allo studio sincronico e diacronico delle tematiche che animano i testi si affianchino il confronto tra le prime stesure dialettali di molti atti unici nati per il Teatro Umoristico e le successive versioni in lingua al momento della loro pubblicazione in rivista e in volume, lo studio variantistico nel passaggio degli atti unici e delle commedie dalla prima (1964) alla seconda edizione (1971) di "Farse e Commedie", tenuto conto anche dell’altrettanto nutrito novero degli inediti, e l’approfondimento delle questioni relative alla inesausta attività di Peppino come adattatore, riduttore e traduttore di opere altrui (Molière, Pirandello, Plauto). Il volume, ricco di interventi volti ad indagare direttamente sui testi teatrali di Peppino, nelle sue componenti tematiche, linguistiche e filologiche, nonché sulle citazioni letterarie in essi presenti, affronta molteplici aspetti della sua poliedrica ed eclettica personalità, dalla scelta di abbandonare il teatro dialettale alle performances linguistiche di Pappagone, dalla sua attività di poeta e autore di fiabe in versi ed in prosa alle sue capacità performative quale attore di teatro e di cinema alle garbate rappresentazioni narrative e teatrali di natura autobiografica

Uno straordinario intellettuale europeo

presentazione del volum