3,798 research outputs found
Tracce di storia. Ciò che vedo e ciò che interpreto nello sguardo fotografico di Paola Mattioli
No full textLa prefazione "legge" e interpreta lo sguardo fotografico di Paola Mattioli che, con le sue immagini, ha cercato di ricostruire il lavoro di fabbrica e il profilo dei lavoratori nello stabilimento Landini di Fabbrico (RE)
Doppler echocardiographic evaluation of Right Ventricular Function in Patients with Right Ventricular Infarction
No full textThe aim of the present study was to assess the utility of the myocardial performance index in patients with right ventricular infarction. During the study period, 120 patients were evaluated: 50 patients had a right ventricular infarction and 70 patients had an inferior left ventricular infarction without right ventricularinvolvement. On admission, an echocardiogramwas obtained from all patients prior to the initiation of thrombolytic therapy. The right ventricular myocardial performance index was calculated, aswere the Doppler-derived parameters of the right side of the heart. All patients with right ventricular infarction had undergone a right ventricular dilation, compared with 70 patients with left ventricular infarction (right ventricular end diastolic diameter32 ± 13 versus 26 ± 24 mm; P < 0.01) and increased areas (diastolic area 24.8 ± 9.9 versus 15.1 ± 6.8 cm2;P < 0.01). Tricuspid regurgitation was detected in 26 patients. The mean peak velocity of tricuspid regurgitation was 3.8 ± 0.8 m/s. The Doppler intervals,isovolumetric contraction times (136 ± 30 versus 49 ± 11 ms; P < 0.01), and relaxation times (71 ± 28 versus 37 ± 9 ms; P < 0.01) were prolonged in patients with right ventricular infarction, whereas the ejection time was significantly reduced (250 ± 31 versus 330 ± 26 ms; P < 0.001). The myocardial performance index was significantly increased in patients with right ventricular infarction (0.85 ± 0.2 versus 0.26 ±0.1; P < 0.01). The inferior vena cava collapse was reduced in all patients with right ventricular infarction (35 ± 20%). The right ventricular myocardial performance index was a useful indicator of right ventricular performance in patients with right ventricularinfarction. The use of echocardiographic parameters of the right side of the heart and Doppler echocardiographic parameters of right ventricular function provides a reliable diagnosis of right ventricular infarction
Frammentazione/collaborazione. Verso un nuovo rapporto tra impresa e territorio
No full textFin dalle loro origini, i territori della produzione distrettuale sono stati caratterizzati da una configurazione organizzativa e spaziale frammentata, legata alla scomposizione per fasi del ciclo produttivo, nonché all’espansione pulviscolare e autopromossa tipico della piccola impresa che, seppur in continuità con elementi socio-spaziali preesistenti, trasforma il territorio in un’estesa ‘campagna urbanizzata’, dove l’urbanizzazione diffusa è guidata dall’industrializzazione e, in particolare, da processi imitativi e competitivi.
Oggi i distretti industriali, le loro imprese, gli spazi e i territori della manifattura sono profondamente cambiati. L’arrivo di importanti multinazionali straniere nei sistemi produttivi di tipo extra-metropolitano si affianca alla selezione degli operatori all’interno della popolazione locale delle imprese e al consolidarsi di processi di concentrazione aziendale che portano alla nascita di medie imprese, soggetti leader nel proprio settore, tecnologicamente avanzati e impegnati in attività di R&S, inseriti all’interno di complesse supply chain internazionali. Se le medie imprese rivelano l’emergere di un nuovo rapporto tra spazi della produzione e territorio, in cui sviluppo economico e qualificazione spaziale sono sempre più associati, tuttavia, si tratta di interventi episodici e individuali. A partire da questa osservazione, il contributo riflette, da un lato, sulla mancanza di indirizzi chiari di messa a sistema, nonostante i processi di gerarchizzazione abbiano ridotto il numero dei soggetti imprenditoriali presenti sul territorio, rendendo potenzialmente più facili operazioni di cooperazione mossi dal pubblico. È in questo senso che si evidenziano, dall'altro lato, possibilità e condizioni per favorire una maggiore responsabilizzazione e collaborazione delle imprese nei confronti della valorizzazione del territorio, inteso come ambito di vita e fattore (comune) di attrattività
Left Atrial Anatomy and Function After Atrial Fibrillation of Brief Duration in Hypertrophic Hearts
No full textThe aim of the study was to evaluate the influence of left ventricular (LV) hypertrophy on left atrial (LA) electrical and mechanical function after cardioversion atrial fibrillation (A-Fib) ofbrief duration. Study group A included 100 patients with a first diagnosis of hypertension who had a moderate LV hypertrophy. The patient population included 64 men and 36 women with a mean age of 55 ±7 years who were hospitalized because of A-Fib and were cardioverted with external DC shock. Control group B included 100 patients without cardiac hypertrophy cardioverted because of lone A-Fib. Atrial function and size were assessed by Doppler echocardiography and the following parameters were measured: transmitral peak A velocity, atrial filling fraction, atrial ejection force, peak E velocity, deceleration time, and isovolumic relaxation time, LA maximal and minimal volume, and LV cardiac mass index. Baseline echocardiography showed that LA diameters and volumes were enlarged in all patients during A-Fib. After the restoration of sinus rhythm LA diameters and volumes decreased and the reduction was more evident in group B compared to group A. LA function as a continuous variable was negatively related to LV mass index (r = –0.77), LA diameter (r = –0.66 and r = –0.69 for the superoinferior diameter), LA maximal volume (r = –0.61) and LA minimal volume (r = –0.55) (all p <0.01).Atrial ejection force as a continuous variable was positively related to age (r = 0.78), peak A wave velocity (r = 0.71), systolic blood pressure (r = 0.51), and IVRT (r =0.41) (all p <0.01).Hypertrophy influenced the recovery of atrial function after cardioversion of A-Fib. Atrial function was reduced in patients with LV hypertrophy even after A-Fib of brief duration
La regolamentazione dello short selling: effetti sul mercato azionario italiano (Short selling ban: effects on the Italian stock market)
No full textOn September 2008, Consob banned the short-selling of financial stocks in the Italian equity market. We analyse the effect of these bans on liquidity, returns, volatility and market efficiency comparing a sample of 23 financial stocks with a control group. The analysis shows a reduction in liquidity for the banned stocks and no significant differences in returns, volatility and market efficiency between the two groups, testifying the inability of restrictions to achieve the purpose for which they were introduced
Efficacia di un intervento ergonomico sulla postura lavorativa e sul mal di schiena nei videoterminalisti
No full text.BACKGROUND: Several studies report a high prevalence of low back pain (LBP) among video-terminal (VDT) workers. Targeted ergonomic interventions can help reduce the burden. OBJECTIVES: We investigated the long-term efficacy of an ergonomic postural intervention to address LBP among VDT workers. STUDY DESIGN: Non-randomized, crossover trial. POPULATION AND SETTING: Four hundred employees working in the administrative offices of the two main buildings of the town hall ofForlì who used VDTs for at least 20 hours a week; we randomly selected 100 participants from each building. INTERVENTION: Ergonomic adjustment of the VDT workstation design. OUTCOME MEASURES: Changes in prevalence of LBP and work-related posture. RESULTS: The ergonomic adjustment of the workstation improved work-related posture and reduced LBP in VDT operators who benefited from the intervention. CONCLUSIONS: A personalized ergonomic prevention intervention can improve work-related posture and LBP for VDT workers
Effetto dell’integrazione alimentare di differenti estratti vegetali contenenti composti fenolici nel coniglio: prestazioni produttive e qualità della carne.
No full text«Dietary supplementation of different plant extracts containing phenolic compounds in rabbits:
performance and meat quality»
Summary. The present experiment studied the effect of dietary supplementations with oregano, rosemary and
oregano+rosemary on rabbit growth performance and meat quality. Five groups of forty New Zealand White
(NZW) weaned rabbits were submitted to the following dietary treatments: Standard diet (S); Standard diet
+150 ppm vitamin E (E); Standard diet + 0.2% oregano extract (O); Standard diet + 0.2% rosemary extract
(R); Standard diet + 0.1% oregano extract + 0.1% rosemary extract (OR). Each diet contained integrations
of: 50 ppm vitamin E, CLA 0.5% (from soy oil), 3% Omega Lin® (Mignini & Petrini) and 0.5% mixed vitamins.
Rabbits were slaughtered at 80 d of age and slaughter yield and carcass traits were determined. On
Longissimus dorsi (LD) muscle, the ultimate pH was measured, the cooking loss and the Water Holding Capacity
(WHC) were estimated, the L*, a* and b* color parameters and the antioxidant status (TBARs) were
measured. The body weight, which was recorded at 80 days of age, was higher in O and OR groups (2344
g and 2368 g, P<0.05) compared to the other dietary treatments; O group recorded the best DWG (24.26
g/d, P<0.05), FCR (2.59, P<0.05) and carcass weight (1425 g, P<0.05). The best carcass yield was recorded
for dietary groups integrated with aromatic essences. The S group showed the highest value for cooking loss
(P<0.05), thus highlighting the importance of a dietary integration with antioxidants to preserve the integrity
of the muscle membranes. Analyzing the color parameters, only the red index “a*” reached the statistical
significance. Specifically, it showed the lowest values for O and OR groups, as it is desirable for rabbit meat.
Concerning the oxidative stability of the meat, groups E and O showed lower MDA contants compared to
the other dietary treatments (P<0.05). In conclusion, a dietary supplementation with natural extracts showed
positive effects on rabbits’ performances and some meat quality parameters
Recensione di A. Mattioli, «Viva Mussolini!». La guerra della memoria nell’Italia di Berlusconi, Bossi e Fini
No full textLa recensione analizza il testo di Mattioli sull'elaborazione della memoria del fascismo negli anni successivi al 1994. Pur rilevando l'utilità informativa del testo, la recensione critica alcune semplificazioni nell'analisi del ruolo di Berlusconi
Integrating gender into livestock projects is crucial to sustainable successful rural development
No full textIn November 2011, Raffaele Mattioli (Food and Agriculture Organization Animal Production and Health Division) participated in a training workshop on integrating gender in livestock projects and programs for FAO country livestock officers and partners in East and Southern Africa. Here he reflects on the workshop activities and outcomes
Atrial stunning, inflammation and nutritional status after cardioversion from atrial fibrillation
No full textBACKGROUND: Conversion of atrial fibrillation (A-Fib) to sinus rhythm is associated with transient mechanical dysfunction of left atrium and appendage, termed atrial stunning. OBJECTIVES: The aim of the present study was to evaluate the relationship between nutritional status and atrial stunning after conversion of A-fib. METHODS: Fifty-eight hemodynamically stable patients referred for cardioversion for lone AF were included in this study. To assess nutritional status and inflammation we measured: hemoglobin, erythrocyte mean cell volume, increased transferrin, decreased percent transferrin saturation and ferritin, albumin, CRP and Fe. Usual dietary intake was assessed with the use of a semi-quantitative food frequency questionnaire. LA function was assessed using peak atrial filling velocity, atrial ejection force and peak of emptying and filling velocities of left atrial appendage. RESULTS: Patients were categorized in 4 groups according to value of CRP and Fe. Patients with normal value of CRP and normal value of Fe and patients with elevated CRP but normal value of Fe showed no difference in parameters of atrial function. On contrary patients with reduced value of Fe showed significantly reduced parameters of atrial function. CONCLUSIONS: Data of the present study showed that patients with a reduction of Fe present a marked dysfunction of atrial contractility in comparison with other groups. We cautiously hypothesize an iron mechanism. The hemodynamic stress due to A-Fib can generate highly toxic hydroxyl radicals. These oxygen free radicals probably damage cells by oxidating various cell components and could be important in inducing myocardial stunning after A-Fib
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