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Search Results: 1 - 10 of 1692 matches for " Cristiano Lazoski "
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Population genetic structure of Brazilian shrimp species (Farfantepenaeus sp., F. brasiliensis, F. paulensis and Litopenaeus schmitti: Decapoda: Penaeidae)
Gusm?o, Jaqueline;Lazoski, Cristiano;Solé-Cava, Antonio M.;
Genetics and Molecular Biology , 2005, DOI: 10.1590/S1415-47572005000100029
Abstract: penaeid shrimps are important resources for worldwide fisheries and aquaculture. in the southwest atlantic, farfantepenaeus brasiliensis, f. paulensis, f. subtilis, farfantepenaeus sp. and litopenaeus schmitti are among the most important commercially exploited species. despite their high commercial value, there is little information available on the different aspects of their biology or genetics and almost no data on their stock structure. we used allozymes to estimate variability levels and population genetic structure of f. brasiliensis, f. paulensis, l. schmitti and the recently detected species farfantepenaeus sp. along as much as 4,000 km of brazilian coastline. no population heterogeneity was detected in f. brasiliensis or l. schmitti along the studied area. in contrast, fst values found for farfantepenaeus sp. and f. paulensis indicate that the populations of those two species are genetically structured, comprising different fishery stocks. the largest genetic differences in f. paulensis were found between lagoa dos patos (south) and the two populations from southeast brazil. in farfantepenaeus sp., significant differences were detected between the population from recife and those from fortaleza and ilhéus.
Phylogeographic Pattern and Extensive Mitochondrial DNA Divergence Disclose a Species Complex within the Chagas Disease Vector Triatoma dimidiata
Fernando A. Monteiro, Tatiana Peretolchina, Cristiano Lazoski, Kecia Harris, Ellen M. Dotson, Fernando Abad-Franch, Elsa Tamayo, Pamela M. Pennington, Carlota Monroy, Celia Cordon-Rosales, Paz Maria Salazar-Schettino, Andrés Gómez-Palacio, Mario J. Grijalva, Charles B. Beard, Paula L. Marcet
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0070974
Abstract: Background Triatoma dimidiata is among the main vectors of Chagas disease in Latin America. However, and despite important advances, there is no consensus about the taxonomic status of phenotypically divergent T. dimidiata populations, which in most recent papers are regarded as subspecies. Methodology and Findings A total of 126 cyt b sequences (621 bp long) were produced for specimens from across the species range. Forty-seven selected specimens representing the main cyt b clades observed (after a preliminary phylogenetic analysis) were also sequenced for an ND4 fragment (554 bp long) and concatenated with their respective cyt b sequences to produce a combined data set totalling 1175 bp/individual. Bayesian and Maximum-Likelihood phylogenetic analyses of both data sets (cyt b, and cyt b+ND4) disclosed four strongly divergent (all pairwise Kimura 2-parameter distances >0.08), monophyletic groups: Group I occurs from Southern Mexico through Central America into Colombia, with Ecuadorian specimens resembling Nicaraguan material; Group II includes samples from Western-Southwestern Mexico; Group III comprises specimens from the Yucatán peninsula; and Group IV consists of sylvatic samples from Belize. The closely-related, yet formally recognized species T. hegneri from the island of Cozumel falls within the divergence range of the T. dimidiata populations studied. Conclusions We propose that Groups I–IV, as well as T. hegneri, should be regarded as separate species. In the Petén of Guatemala, representatives of Groups I, II, and III occur in sympatry; the absence of haplotypes with intermediate genetic distances, as shown by multimodal mismatch distribution plots, clearly indicates that reproductive barriers actively promote within-group cohesion. Some sylvatic specimens from Belize belong to a different species – likely the basal lineage of the T. dimidiata complex, originated ~8.25 Mya. The evidence presented here strongly supports the proposition that T. dimidiata is a complex of five cryptic species (Groups I–IV plus T. hegneri) that play different roles as vectors of Chagas disease in the region.
Ten Years of the Central Italy Electromagnetic Network (CIEN) Continuous Monitoring  [PDF]
Cristiano Fidani, Daniele Marcelli
Open Journal of Earthquake Research (OJER) , 2017, DOI: 10.4236/ojer.2017.62004
Abstract: A test is being realised by means of a network of wide band electromagnetic detectors that continuously records the electric components of the electromagnetic field, ranging from a few of Hz to tens of kHz. The network has been operating in central Italy for more than ten years. The recorded signals from this network have been analysed in real time as well as their power spectrum contents. Time/frequency data have been saved for further analysis. The spectral contents have evidenced very distinct power spectrum signatures in ELF band that increase in intensity when strong seismic activity occurs near the stations, for example, at the time of Amatrice (M = 6) and Norcia (M = 6.5) earthquakes in 2016 when ten stations were operative, at the time of the Emilia (M = 6) earthquakes in 2012 when nine stations were operative, and at the time of the L’Aquila (M = 6.3) earthquakes in 2009 when only two stations were operative. Strong signals were also detected during the moderate Ancona (M = 5) earthquake in 2013 and by the recently installed Avigliano Umbro, Città di Castello and Gubbio stations in the Umbria region, during small seismic swarms (2 < M < 4) between 2013 and 2014. CIEN is presently composed of 16 stations and collect data from a multidisciplinary instrumentation.
Seismic Precursory Phenomenology in Unusual Animal Behaviour in Val Pellice, Western Piedmont, in Comparison with Anomalies of Some Physical Parameters  [PDF]
Giovanna de Liso, Cristiano Fidani
Open Journal of Earthquake Research (OJER) , 2014, DOI: 10.4236/ojer.2014.31005
Abstract:

The unusual animal behaviour, often observed before earthquakes in a moderate seismic area in Western Piedmont (NW Italy), can be connected with the anomalies of some physical parameters, recorded in a multiple parameters monitoring. Physical phenomena such as radioactive decay, gas emission, soil temperature increase, water pH variations in creeks and lakes, magnetic declination anomalies, air electricity and infra-sound, can generate damages to biological structures or, sometimes, death. A multiple parameters physical monitoring started recently in Western Piedmont, which is useful to propose the study of seismic precursors possibly linked to animal behaviour. Observations of unusual animal behaviour as vocal communications and movements were collected in the same area. A statistical analysis of strange behaviours in dogs and cats may indicate the probable early warning factor of the sense of smell.

The Central Italy Electromagnetic Network and the 2009 L'Aquila Earthquake: Observed Electric Activity
Cristiano Fidani
Geosciences , 2011, DOI: 10.3390/geosciences1010003
Abstract: A network of low frequency electromagnetic detectors has been operating in Central Italy for more than three years, consisting of identical instruments that continuously record the electrical components of the electromagnetic field, ranging from a few Hz to tens of kHz. These signals are analyzed in real time and their power spectrum contents and time/frequency data are available online. To date, specific interest has been devoted to searching for any possible electromagnetic features which correlate with seismic activity in the same region. In this study, spectral analysis has evidenced very distinct power spectrum signatures that increased in intensity when strong seismic activity occurred near the stations of the 2009 L'Aquila earthquake. These signatures have revealed horizontally oriented electric fields, between 20 Hz to 400 Hz, lasting from several minutes to up to two hours. Their power intensities have been found to be about 1 μV/m. Moreover, a large number of man-made signals and meteorologic electric perturbations were recorded. Anthropogenic signatures have come from power line disturbances at 50 Hz and higher harmonics up to several kHz, while radio transmissions have influenced the higher kHz spectrum. Reception from low frequency transmitters is also provided in relation to seismic activity. Meteorologic signatures cover the lower frequency band through phenomena such as spherics, Schumann resonances and rain electrical perturbations. All of these phenomena are useful teaching tools for introducing students to this invisible electromagnetic world.
A defini??o da fenomenologia: Merleau-Ponty leitor de Husserl
Perius, Cristiano;
Trans/Form/A??o , 2012, DOI: 10.1590/S0101-31732012000100009
Abstract: the task of defining phenomenology, ever since the phenomenology of perception, has induced a taking of sides with regard to who the true father of phenomenology is. the critique of husserl's idealism, the role of ambiguity, the impossibility of complete reduction, among other great themes, personalizes the phenomenology of merleau-ponty in relation to that of his master. the object of this article is to show how, in his description of the "phenomenological method", merleau-ponty moves away from the fundamental concepts of husserl without ceasing to continually return to them.
Economics of knowledge and the governance of commons knowledge
Cristiano Antonelli
Revista Brasileira de Inova??o , 2002,
Abstract: Economics of knowledge provides new tools to study the features of knowledge as aneconomic good and new ways to understanding the governance of knowledge. This sheds newlight upon the institutional design, the incentives mechanisms, including intellectual propertyrights, and the signalling devices that make it possible the organization of the production anddistribution of knowledge in economic systems.
Sociabilidade e sociedade de risco: um estudo sobre rela es na modernidade
Cristiano Guedes
Physis: Revista de Saúde Coletiva , 2005, DOI: 10.1590/s0103-73312005000200009
Abstract:
LEIBNIZ E A QUEST O DA SUBJETIVIDADE
Cristiano Bonneau
Problemata : International Journal of Philosophy , 2011, DOI: 10.7443/problemata.v2i2.11542
Abstract: A fundamenta o do universo monadológico acarreta conseqüências importantes para a reflex o sobre uma teoria da subjetividade à partir da filosofia de Leibniz. Ao descrever a m nada, o filósofo alem o esclarece seus atributos e salvaguarda duas no es fundamentais: autonomia e perspectiva. Esta comunica o trata de expor na filosofia de Leibniz os pressupostos que garantem uma no o de indivíduo, alicer ado em um princípio de identidade e representante pleno do mundo à partir de si( speculum vitale). Desta forma, a polêmica Renaut-Heidegger é o ponto de partida para pensarmos em um plano da subjetividade em Leibniz. Palavras-chave: Leibniz, Heidegger, Renaut, subjetividade, speculum vitale The reasoning of the monadic universe carries important consequences for think about a theory of subjectivity in the philosophy of Leibniz. In describing the monad, the German philosopher explains its attributes and safeguards two fundamental concepts: autonomy and perspective. This article is to explain the philosophy of Leibniz assumptions guaranteeing a notion of the individual, based on the principle of identity and fully representative of the world from itself (speculum vitale). Thus, the controversy Renaut-Heidegger is the starting point to think of a plan of subjectivity in Leibniz. Key-words: Leibniz, Heidegger, Renaut, subjectivity, speculum vitale
O que é ética em Pesquisa; Dirce Guilhem & Debora Diniz - DOI: 10.3395/reciis.v2.Sup1.215en
Cristiano Guedes
RECIIS : Electronic Journal of Communication, Information & Innovation in Health , 2008,
Abstract:
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