1,721,075 research outputs found
Indagine sul controllo della Tubercolosi in un gruppo di lavoratori della sanità nell’Università di Sassari
No full textCaratterizzazione di popolazioni di Pseudomonas syringae agenti dell’ “avvizzimento” di rami e branche su nocciolo in Sardegna
No full textPhenotypic and genetic characterization of Erwinia carotovora subsp. carotovora (Jones) Bergey et al. strains isolated from grafted tomato in Sardinia
No full textEsperienze di lotta alla maculatura batterica del pomodoro da industria in Sardegna
No full textIn prove di campo condotte nel 2001-2002 è stata saggiata, su pomodoro da industria, l’attività dell’acibenzolar-S-methyl (CGA245704), “attivatore vegetale” capace di indurre resistenza sistemica, per il controllo della maculatura batterica (Xanthomonas campestris pv. vesicatoria).
Nella biennio di sperimentazione sono stati utilizzati prodotti sia registrati sia non autorizzati sulla coltura. L’efficacia dell’acibenzolar-S-methyl, da solo o in miscela con idrossido di rame è stata valutata in confronto con altri battericidi.
Dai risultati ottenuti è emerso che il miglior controllo della maculatura batterica è stato ottenuto con l’acibenzolar-S-methyl. Per contro, l’idrossido di rame è stato quello che ha manifestato la minore efficacia. La sua azione poteva essere, tuttavia, assimilata a quella fornita dal fosetil alluminio. L’idrossichinolin solfato ha fornito un’azione statisticamente paragonabile alla miscela acibenzolar-S-methyl/idrossido di rame. L’azione dell’idrossido di rame in miscela con mancozeb, seppure limitata ad un solo anno di prova, poteva essere paragonata a quella fornita dal fosetil alluminio. Infine, l’acibenzolar-S-methyl in miscela con l’idrossido di rame non ha fornito un’efficacia paragonabile a quella ottenuta quando è stato usato da soloField control of industrial tomato bacterial spot in Sardinia.
The efficacy of acibenzolar-S-methyl (CGA245704), a plant activator that induces systemic acquired resistance, in controlling bacterial spot (Xanthomonas campestris pv. vesicatoria) was evaluated on industrial tomato in field trials carried out in Sardinia in the period 2001-2002.
Treatments were performed by using both registered and experimental compounds. The efficacy of acibenzolar-S-methyl, alone or with copper hydroxide mixture, was compared with other chemicals. In particular, a better control of the disease was obtained by acibenzolar-S-methyl than using others bactericides. The lowest protection was provided by copper hydroxide. Its effectiveness was equivalent to that of phosethyl-Al. Hydroxyquinoline sulfate gave a control of bacterial spot statistically similar to the mixture acibenzolar-S-methyl/copper hydroxide. The mixture copper hydroxide-mancozeb gave a control of bacterial spot similar to phosethyl-Al. Finally, acibenzolar-S-methyl in combination with copper hydroxide did not offer better control of bacterial spot compared with acibenzolar-S-methyl used alone
Caratterizzazione di isolati di Pseudomonas syringae agenti dell’avvizzimento del nocciolo in Sardegna
No full textA bacterial disease of saffron caused by Burkholderia gladioli and Pseudomonas spp.
No full textSymptoms of a disease of possible bacterial origin were observed
in the leaves and corms of some saffron plots in Sardinia
since October 2003. The leaves had reddish brown spots, that
were either isolated or coalescing and were surrounded by a large chlorotic halo. The corms had yellowish-brown rounded spots,
which tended to become black with time. Isolation on nutrient
agar from corms and leaves produced numerous cream to yellowish-
brown and white-cream bacterial colonies mixed with others
characterized by a yellow hue. Based on their frequency, ten
colonies were selected, four of which were cream to yellowishbrown,
four white-cream, and two yellowish. In pathogenicity
tests, only four of ten isolates reproduced the symptoms on saffron
leaves and corms, and three could also infect tomato plants.
These four virulent isolates were identified with conventional
tests and the computerised system BIOLOG. One isolate was
identified as Burkholderia gladioli, one as Pseudomonas corrugata
while the remaining two were P. fluorescens biotype F. The latter
three isolates reacted positively with a serum to P. corrugata anti
IPVSS-6FP. Fatty acid profiles of two representative isolates confirmed
that one was Burkholderia sp., and the other Pseudomonas
sp. (P. fluorescens/P. marginalis/P. putida). We suggest that isolates
of B. gladioli and Pseudomonas spp. are responsible for the
saffron disease found in Sardinia. B. gladioli has only been reported
once in the literature. Genomic characterization of the other
three pseudomonads is underway
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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