90,896 research outputs found

    Archeologia cristiana in Puglia e Basilicata. Ricerche, metodi e prospettive (1993-2022)

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    Nel contributo si presentano un aggiornamento e una riflessione sui principali temi affrontati negli ultimi anni sull’archeologia cristiana in Puglia e Basilicata, soffermandosi soprattutto sui nuovi apporti riguardanti la topografia cristiana delle città e la cristianizzazione delle campagne, sul ruolo dei vescovi nello svolgersi di tali processi (e di conseguenza sulle forme dell’organizzazione diocesana)

    VALORIZZAZIONE DI VITIGNI LUCANI DI INTERESSE ENOLOGICO: RIGENERAZIONE IN VITRO E MUTAGENESI ENZIMATICA

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    Valorizzazione di vitigni lucani di interesse enologico: rigenerazione in vitro e mutagenesi enzimatica. Giorio Giovanni*, Stigliani A. L.*, Zaccagnino A.**, Nuzzo V.**, Cellini F.*, D’ambrosio C.* Giorio Giovanni*, Stigliani A. L.*, Zaccagnino A.**, Nuzzo V.**, Cellini F.*, D’ambrosio C.* *) Centro Ricerche Metapontum Agrobios, ALSIA, Metaponto (MT) **) Università della Basilicata, Dipartimento delle Culture Europee e del Mediterraneo, Matera Scopo della ricerca La globalizzazione dei mercati, il cambiamento climatico e la recrudescenza di alcune malattie impongono un costante adattamento delle scelte imprenditoriali per garantire la sostenibilità economica, sociale e ambientale dell’attività vitivinicola. Una piattaforma ampelografica regionale con un’ampia base genetica rappresenta uno strumento indispensabile al contrasto delle minacce della viticoltura moderna. Le attività di ricerca hanno riguardato: a) la costituzione di una banca di germoplasma in vitro costituita da accessioni dei vitigni da vino Aglianico, Aleatico, Greco Bianco, Merlot e Primitivo e del vitigno Crimson, b) la definizione dei protocolli di embriogenesi somatica e di rigenerazione da protoplasti isolati da calli embriogenici e c) la definizione dei protocolli di mutagenesi enzimatica CRISPR/Cas9 su geni di suscettibilità a patogeni fungini. Materiali e metodi La capacità di rigenerazione mediante embriogenesi somatica è stata valutata per tutti i vitigni utilizzando vari substrati e combinazioni di fattori di crescita. I calli embriogenici ottenuti sono stati utilizzati per l’isolamento di protoplasti per i quali sono stati valutati vari substrati per la rigenerazione e la trasformazione transiente. Principali risultati Tutti i vitigni analizzati sono stati rigenerati mediante embriogenesi somatica. Sono stati ottimizzati i protocolli per l’isolamento dei protoplasti e la loro trasformazione transiente con geni reporter mentre le prove di rigenerazione sono tuttora in corso. Conclusioni La definizione di protocolli efficienti di rigenerazione da protoplasti e di editing genetico consentirà di ottenere piante di vite editate in modo da ampliare la base genetica della banca di germoplasma fornendo materiale di base risanato e migliorato per la moltiplicazione in ambito vivaistico

    Giacobbe

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    Variations of DNA polymerase-alpha and -beta during prolonged stimulation of human lymphocytes

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    Stimulation of human lymphocytes with phytohemagglutinin is known to induce an increase in overall DNA polymerase activity (DNA nucleotidyltransferase; deoxynucleosidetriphosphate:DNA deoxynucleotidyltransferase, EC 2.7.7.7). Previous work [Pedrali Noy, G., Dalpra, L. Pedrini, A. M., Ciarrocchi, G., Giulotto, E., Nuzzo, F. & Falaschi, A. (1974) Nucleic Acids Res. 1, 1183] has shown that two subsequent waves of induction of DNA polymerase can be observed in this system; a first wave occurs in parallel with the increase in DNA replication rate; a second one occurs when the DNA synthesis rate is returned to minimal levels; the second peak is parallel to a maximum in DNA ligase and DNase levels. In the present work we have measured the levels of the DNA polymerases-alpha and -beta in phytohemagglutinin-stimulated lymphocytes during a 12-day period; both enzymes are present at detectable levels at time zero; in correspondence to the peak of DNA synthesis rate (between the fourth and fifth day) a peak of DNA polymerase-alpha is observed, increasing by a factor of approximately 20-fold over the zero time value; subsequently, the level of DNA polymerase-alpha decreases in parallel with DNA synthesis rate. The DNA polymerase-beta is also increased in correspondence to the peak in DNA synthesis rate, but reaches its maximum at later times, between the eighth and tenth day of incubation. The capacity of stimulated lymphocytes to perform repair synthesis following UV damage was measured in the same cells used for the enzyme activity determinations; this capacity also shows two maxima: a first one correlated with the peak in DNA replication rate, and a second one correlated with the peak of DNA polymerase-beta. These data suggest a certain tendency to the specialization of functions in human cell DNA polymerases; the alpha-enzyme seems mainly correlated with DNA replication, whereas the beta-enzyme seems more correlated with the ability of the cell to perform repair type synthesis

    Variations of DNA polymerase-alfa and -beta during prolonged stimulation of human lymphocytes.

    No full text
    Stimulation of human lymphocytes with phytohemagglutinin is known to induce an increase in overall DNA polymerase activity (DNA nucleotidyltransferase; deoxynucleosidetriphosphate:DNA deoxynucleotidyltransferase, EC 2.7.7.7). Previous work [Pedrali Noy, G., Dalprà, L. Pedrini, A. M., Ciarrocchi, G., Giulotto, E., Nuzzo, F. & Falaschi, A. (1974) Nucleic Acids Res. 1, 1183] has shown that two subsequent waves of induction of DNA polymerase can be observed in this system; a first wave occurs in parallel with the increase in DNA replication rate; a second one occurs when the DNA synthesis rate is returned to minimal levels; the second peak is parallel to a maximum in DNA ligase and DNase levels. In the present work we have measured the levels of the DNA polymerases-alpha and -beta in phytohemagglutinin-stimulated lymphocytes during a 12-day period; both enzymes are present at detectable levels at time zero; in correspondence to the peak of DNA synthesis rate (between the fourth and fifth day) a peak of DNA polymerase-alpha is observed, increasing by a factor of approximately 20-fold over the zero time value; subsequently, the level of DNA polymerase-alpha decreases in parallel with DNA synthesis rate. The DNA polymerase-beta is also increased in correspondence to the peak in DNA synthesis rate, but reaches its maximum at later times, between the eighth and tenth day of incubation. The capacity of stimulated lymphocytes to perform repair synthesis following UV damage was measured in the same cells used for the enzyme activity determinations; this capacity also shows two maxima: a first one correlated with the peak in DNA replication rate, and a second one correlated with the peak of DNA polymerase-beta. These data suggest a certain tendency to the specialization of functions in human cell DNA polymerases; the alpha-enzyme seems mainly correlated with DNA replication, whereas the beta-enzyme seems more correlated with the ability of the cell to perform repair type synthesis
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