102,202 research outputs found

    Ammaestramenti matrimoniali

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    Edizione di un testo trecentesco anonimo secondo il ms. Città del Vaticano, Biblioteca Apostolica, Chig. L.VII.26

    Nuova tecnica per la determinazione rapida della popolazione di lieviti presente nei mosti e nei vini.

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    Nuova tecnica per la determinazione rapida della popolazione di lieviti presente nei mosti e nei vini

    Influenza del grado di infezione da Botrytis cinerea sulle attività tirosinasi e laccasi dei mosti.

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    Influenza del grado di infezione da Botrytis cinerea sulle attività tirosinasi e laccasi dei mosti

    L'inoculo simultaneo di lieviti e batteri: una promettente alternativa in mosti con gravi carenze azotate

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    In questo lavoro è stata presa in considerazione la possibilità di applicare l’inoculo simultaneo di lieviti e batteri in mosti rossi che abbiano un contenuto in azoto molto basso come frequentemente osservato nell'area Mediterranea. Sono state condotte 48 microvinificazioni, confrontando i risultati chimici e microbiologici ottenuti da inoculi simultanei o sequenziali di lieviti e batteri. In nessun caso sono stati osservati arresti della FA, nonostante il contenuto di azoto drammaticamente basso dei mosti. Nelle prove di coinoculo la FML e la FA si sono svolte simultaneamente; nel caso di inoculi sequenziali il consumo di acido malico non si è concluso nei 66 giorni considerati. L’aumento medio di acido acetico è inferiore al 0.6 g/L, ma generalmente più elevato nelle prove a inoculo simultaneo; analogamente la durata di FA nelle prove coinoculo ha avuto 10-12 giorni di ritardo rispetto alle vinificazioni tradizionali

    Vendemmia meccanica e qualità dei mosti

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    La principale caratteristica delle uve raccolte a macchina è il danneggiamento di parte degli acini, con la conseguente formazione di mosto libero che può risultare sensibile a reazioni biochimiche e ad attacchi microbiologici incontrollati. Nella prova sono state valutati i mosti provenienti dalla raccolta di un vitigno a bacca bianca (montuni) e di uno a bacca nera (lambrusco). La vendemmia manuale è stata confrontata con quella meccanica prevedendo per quest'ultima differenti interventi tecnologici (nessuno, raffreddamento con ghiaccio secco e trattamento con an. solforosa e tannini). La valutazione ha evidenziato gli ottimi risultati ottenuti con la protezione chimica o fisica del prodotto vendemmiato a macchina

    Recalcitrant Venous Leg Ulcers May Heal by Outpatient Treatment of Venous Disease Even in the Presence of Concomitant Arterial Occlusive Disease.

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    Objective/Background Peripheral arterial occlusive disease (PAOD) is reported in about 15–20% of patients with venous leg ulcers (VLU). In such cases arterial recanalization is often recommended, and compression therapy is considered a contraindication when the ankle brachial pressure index (ABPI) is < 0.8. The aim of this study was to compare the outcome of patients with recalcitrant VLU, both without any arterial impairment (“pure venous recalcitrant leg ulcer” [pvRLU]) and with associated PAOD (“mixed arterial and venous recalcitrant leg ulcer” [mavRLU]), by treating only the venous disease. Methods The records of 180 outpatients with recalcitrant ulcers treated between January 2011 and July 2014 were reviewed retrospectively. In total, 109 were affected by pvRLU and 71 by mavRLU, with moderate PAOD defined by an ABPI between 0.5 and 0.8. In addition to the same local wound dressing, the patients received ultrasound guided foam sclerotherapy of the refluxing superficial veins and a modified inelastic compression with a pressure ≤ 40 mmHg. No patient was referred for arterial revascularization. The patients were followed until ulcer healing. Results Patients with pvRLU and mavRLU showed comparable demographic characteristics. Twenty-five patients were lost to follow up and the outcomes were analyzed in 93 patients with pVLU (85.4%) and in 62 patients with mavRLU (87.4%). The maximum time to complete healing was 48 weeks in the pvRLU group and 52 weeks in the mavRLU group (p = .009), The median healing time was 23 (pvRLU) versus 25.5 weeks (mavRLU) (p = .030). Deep venous incompetence (p < .001), ulcer surface area (p < .001), arterial disease (p = .002), and ulcer duration (p < .010) were risk factors for prolonged healing. Conclusion Treatment of recalcitrant leg ulcers by treating venous incompetence by foam sclerotherapy and modified compression is successful, even if underlying moderate PAOD is not actively treated

    Augmentative biological control of Halyomorpha halys using the native European parasitoid Anastatus bifasciatus: Efficacy and ecological impact

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    We report the first large-scale augmentative biological control project carried out in Europe against Halyomorpha halys (Stal) (Hemiptera: Pentatomidae) using the native egg parasitoid Anastatus bifasciatus (Geoffroy) (Hyme-noptera: Eupelmidae). During summer 2020, a total of 325,000 adults of A. bifasciatus were released at a rate of 1000 individuals/ha of orchard in 11 sites in Trentino-Alto Adige (Northern Italy). Parasitism parameters were compared between release and control (no release) sites, in which at least three egg masses naturally laid by H. halys were collected (for a total of 262 egg masses). Anastatus bifasciatus and Trissolcus mitsukurii (Ashmead) (Hymenoptera: Scelionidae) were the dominant parasitoids, but parasitism by both species fluctuated widely among sites. At release sites, A. bifasciatus showed a significantly higher discovery efficiency (31.4%) and parasitism rate (16.7%) of H. halys egg masses than at control sites (1.7% and 1.2%, respectively). Parasitism by A. bifasciatus was not dependent on egg mass abundance at release sites, but at control sites a host density-dependent response was revealed by a positive relationship between parasitism and number of H. halys egg masses. On the other hand, parasitism by the adventive T. mitsukurii was not affected by either the releases of A. bifasciatus or by the abundance of H. halys egg masses per site. In conclusion, augmentative releases of A. bifasciatus contributed to increasing its parasitization of H. halys, without causing any negative effects on parasitization by naturally occurring species
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