Search results for "serra"
showing 10 items of 152 documents
Settling Down: The Genome of Serratia symbiotica from the Aphid Cinara tujafilina Zooms in on the Process of Accommodation to a Cooperative Intracell…
2014
Particularly interesting cases of mutualistic endosymbioses come from the establishment of co-obligate associations of more than one species of endosymbiotic bacteria. Throughout symbiotic accommodation from a free-living bacterium, passing through a facultative stage and ending as an obligate intracellular one, the symbiont experiences massive genomic losses and phenotypic adjustments. Here, we scrutinized the changes in the coevolution of Serratia symbiotica and Buchnera aphidicola endosymbionts in aphids, paying particular attention to the transformations undergone by S. symbiotica to become an obligate endosymbiont. Although it is already known that S. symbiotica is facultative in Acyrt…
Metabolic response of bacteria to elevated concentrations of glyphosate-based herbicide.
2019
Abstract Glyphosate-based herbicides (GBHs) are the most widespread commonly used broad-spectrum herbicides that contaminate soils and waters, are toxic to bacteria, plants and animals, and have been classified as ‘probably carcinogenic to humans’ by the International Agency for Research on Cancer in 2015. Particular soil bacteria and fungi can degrade GBHs, hence, search for new GBH-degrading strains or microbial consortia, effective under specific growth conditions and local environment, seems to be a promising solution for bio-remediation of glyphosate-contaminated environment. Consequently, there is a need for rapid and informative methods to evaluate the GBH-induced changes of the meta…
Pythium perplexum isolated from soil in France: morphology, molecular characterisation and biological control.
2001
Pythium perplexum (F-926) was isolated from a soil sample taken in the Burgundy region in France. In 1907, it was mistakenly described by Bulter as P. vexans. Despite morphological resemblance, the comparison between the internal transcribed spacer 1 regions of the ribosomal DNA of the two fungi leaves no doubt of their different identities. P. perplexum was found to be highly pathogenic to cucumber seedlings. Damping-off disease of cucumber caused by P. perplexum can effectively be controlled by using the soil bacterium Serratia plymuthica (B-781). The details of the morphology and the molecular characterisation of P. perplexum and its biological control with S. plymuthica are described he…
LA COLTIVAZIONE DELL'UVA DA TAVOLA IN SERRA SOTTO FOTOVOLTAICO
Studio della qualità dei frutti e della risposta fotosintetica di tre cultivar di Mango (Mangifera indica L.) coltivate in serra in Sicilia
2022
La coltivazione del mango all’interno di una serra in Sicilia sottopone le piante a temperature estremamente elevate, fino a 50 °C, mentre le temperature minime registrate in serra durante la notte nel corso dell’anno non differiscono da quelle registrate all’aperto. Nonostante le alte temperature estive, l’attività fotosintetica delle piante ha mostrato valori elevati (fino a 20μmol (CO2)/s), ovvero uno dei più alti per il mango sulla base di quanto finora riportato in letteratura. I frutti ottenuti erano di alta qualità, non presentavano imperfezioni derivanti da danni di natura biotica o abiotica. Avevano, inoltre, un elevato contenuto zuccherino e sono stati pienamente apprezzati dai gi…
Food partitioning between Serranus scriba and Scorpaena porcus (Perciformes) on the infralittoral ground of the South Tyrrhenian Sea.
1993
Food preferences of Scorpaena porcus and Serranus scriba were investigated from the stomach contents of fish caught with trammel nets in the Gulf of Palermo (Tyrrhenian Sea). Decapoda Natantia and Decapoda Brachyura were the main preferred prey in the diet of S. porcus whereas Decapoda Natantia, Decapoda Galatheidae and Pisces were the preferred prey for S. scriba. These results and the values of the index of overlapping alimentary requirements suggested competition for food resources between the two species. A more precise investigation, at species level, of the food remains of the most abundant taxon (Crustacea Decapoda) made it possible to demonstrate that the trophic niche overlap betwe…
Valutazione dell'usura nei carrelli per serramenti
2009
Nel lavoro è valutato il comportamento di carrelli per serramenti in condizioni di carico variabile al fine di valutarne l’usura. Le prove dinamiche sono state condotte su una macchina di semplice concezione appositamente realizzata e adatta a garantire un moto alterno sotto carico. Per la valutazione dell’usura è stata eseguita una scansione molto accurata della geometria delle rotelle (prima e dopo aver effettuato le prove dinamiche) attraverso un sistema di rilevazione a luce strutturata COMET V STEINBICHLER. Il processo di scansione ha permesso di digitalizzare le rotelle con un’accuratezza dell’ordine di 5µm. I dati della scansione hanno evidenziato un aumento pressoché uniforme del di…
Palazzo Floridia-Bertini a Ragusa. Il restauro dei serramenti lignei della facciata barocca
2021
Per la “rimarchevole testimonianza dell’esuberante genialità espressa nell’arte e nell’architettura del tardo barocco” nella Val di Noto, nel 2002 il palazzo Floridia-Bertini è inserito dall’UNESCO nella World Heritage List ed inizia a prendere corpo la volontà di intervenire sulla sua facciata. Dopo avere richiamato le riflessioni che hanno condotto alle scelte operative, il contributo espone le più significative fasi di cantiere relative al restauro dei serramenti lignei esterni, con particolare riguardo all’intervento compiuto su un serramento settecentesco. For the “remarkable testimony of the exuberant genius expressed in the art and architecture of the late Baroque” in the Val di Noto…
Comparison of the exoproducts of gram-negative bacteria by SDS-page
1985
The protein exoproducts released during exponential growth of Gram-negative bacteria were analysed and compared by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-Page). The following bacterial strains were tested: Escherichia coli, Klebsiella pneumoniae, Citrobacter freundii, Enterobacter cloacae, Serratia liquefaciens, Serratia rubidaea, Proteus mirabilis, Proteus vulgaris, Salmonella minnesota, Pseudomonas aeruginosa and Pseudomonas fluorescens. It is demonstrated by SDS-Page that members of one species show identical protein pattern, whereas different species show besides comparable protein bands a species characteristic pattern. All members of Enterobacteriaceae were sho…
Pablo Serrano ou l’espace essentiel
1991
Se trata del texto mecanografiado por el propio autor, aunque se correponde con la versión publicada en: Conseil de l'Europe. Exposition anthologique. Pablo Serrano (1908-1985). Conseil de l'Europe. Strasbourg. Zaragoza: Fundación Pablo Serrano.