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Search Results: 1 - 10 of 7502 matches for " Fernanda Amato Gaiotto "
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Diversidade genética de Litopenaeus vannamei cultivado na Bahia
Magalh?es, Marcelo;Martinez, Romari Alejandra;Gaiotto, Fernanda Amato;
Pesquisa Agropecuária Brasileira , 2007, DOI: 10.1590/S0100-204X2007000800009
Abstract: the objective of this work was to evaluate the genetic variability of commercial stocks of shrimp litopenaeus vannamei, using rapd markers and different statistical methods of analysis in canavieiras, ba, brazil. twenty primers were used to obtain 59 polymorphic markers. a significant differentiation among stocks, with fst = 0.186 (p<0.001), was observed by analysis with the software amova. however, an analysis with the software hickory suggested no genetic structure (qb= 0.002), but considerable inbreeding within stocks, possibly due to consanguineous crossings (f = 0.729). statistical tests with bootstrap indicated 48 as the minimum number of rapd markers suitable for studies on genetic variability of this species. by the dendrogram produced from the jaccard similarity matrix, it was observed that the analyzed stocks are composed of genetically different individuals.
Rapid Differentiation of Closely Related Citrus Genotypes by Fluorescence Spectroscopy  [PDF]
Dayse Drielly Souza Santana-Vieira, Débora Marcondes Bastos Pereira Milori, Paulino Ribeiro Villas Boas, Marina Fran?a e Silva, Magno Guimar?es Santos, Fernanda Amato Gaiotto, Walter dos Santos Soares Filho, Abelmon da Silva Gesteira
Advances in Bioscience and Biotechnology (ABB) , 2014, DOI: 10.4236/abb.2014.511105
Abstract: The differentiation of closely related Citrus genotypes is a meticulous, laborious, and time-consuming task that involves the assessment of complex traits such as growth, tolerance to stress, photosynthetic efficiency, yield, and many others. Such a task is generally accomplished either by analyzing specific features of adult plants or by applying molecular markers to young trees. On one hand, only after plants start yielding can distinct genotypes be differentiated by comparing their fruit sizes, shapes, taste, and the number of seeds. On the other hand, molecular markers are expensive, and demand expertise and time for the analysis of a larger number of plants. For these reasons, the development of techniques that could assist in an early, quick and accurate differen-tiation of closely related Citrus varieties is of utmost importance. In this context, laser-induced fluorescence spectroscopy (LIFS) is a promising technique, since it is rapid, highly sensitive, and inexpensive. Previous studies showed that LIFS can differentiate a variety of sweet orange. However, this new study aimed to determine LIFS accuracy in the differentiation and grouping of very closely varieties of four Sunki mandarin selections: Comum, Florida, Tropical, and Maravilha. Furthermore we compared the results with ISSR and SSR molecular markers for the same varieties. LIFS technique distinguished the four selections with accuracy greater than 70%. Only with molecular markers was possible distinguishing clearly Tropical from Maravilha, but not Comum from Florida selections. In this way the results suggest that LIFS may be a sound tool for helping the identification of closely Citrus varieties.
Estrutura genética populacional de Copaifera langsdorffii Desf. (Leguminosae - Caesalpinioideae) em fragmentos florestais no Pontal do Paranapanema, SP, Brasil
Martins, Karina;Santos, Jo?o Dagoberto dos;Gaiotto, Fernanda Amato;Moreno, Maria Andréia;Kageyama, Paulo Yoshio;
Brazilian Journal of Botany , 2008, DOI: 10.1590/S0100-84042008000100007
Abstract: the " pontal do paranapanema" is the most recently deforested region of the state of s?o paulo in brazil. the effects of forest fragmentation on the population genetic structure of copaifera langsdorffii desf. were evaluated by genotyping with six microsatellite loci at least 30 adult and 30 sapling individuals of three populations in " pontal do paranapanema" . the sampling areas comprised two fragments located in the rural settlements tucano (800 ha) and madre cristina (300 ha); and one population located in a continuous forest, the " parque estadual do morro do diabo" (35,000 ha). high levels of genetic diversity were detected in saplings and adults, gene diversity (he) ranged from 0.718 to 0.835 and average number of alleles per locus (a) ranged from 8.67 to 11.83, showing that the fragmentation has not caused loss of alleles yet. the high estimated fixation indexes (from 0.183 to 0.387) are due to null alleles in some loci and the occurrence of inbreeding within populations. genetic divergence was low among adults (rst = 0.035) but increased among saplings (rst = 0.075). as expected, forest fragmentation has caused a decrease in gene flow among the populations, especially between the most distant fragment (tucano - about 8 km from the " parque estadual do morro do diabo" ). an alternative to promote gene flow among forest fragments of " pontal do paranapanema" would be the settle of agroforests, which would act as stepping-stones, favouring pollen and seed dispersion among fragments.
A multi-approach analysis of the genetic diversity in populations of Astyanax aff. bimaculatus Linnaeus, 1758 (Teleostei: Characidae) from Northeastern Brazil
Pamponet, Vanessa de Carvalho Cayres;Carneiro, Paulo Luiz Souza;Affonso, Paulo Roberto Antunes de Mello;Miranda, Viviam Souto;Silva Júnior, Juvenal Cordeiro;Oliveira, Claudine Gon?alves de;Gaiotto, Fernanda Amato;
Neotropical Ichthyology , 2008, DOI: 10.1590/S1679-62252008000400010
Abstract: few reports are available about the ichthyofauna of typical semi-arid rivers, although the regional diversity has been constantly threatened by human activities, mainly related to impoundment and construction of dams. the goal of the present work was to evaluate using different methods, the population genetic structure of a characin fish, astyanax aff. bimaculatus, widespread throughout hydrographic basins of bahia, northeastern brazil. morphological (meristic and morphometric data), cytogenetic (karyotype and ag-nor), and molecular (rapd and spar) analyses were carried out in specimens collected upstream and downstream of pedra dam, in the main channel of contas river (contas river basin), and in the mineiro stream, which belongs to the adjacent rec?ncavo sul basin. few external differences were detected among populations, where the individuals collected upstream of pedra dam were slightly larger than the others. cytogenetic data also showed a similar karyotypic pattern (2n=50; 6m+28sm+12st+4a; fn= 96) and nors located on the short arms of up to two chromosome pairs, with numerical inter- and intra-populational variation. nonetheless, rapd and spar analyses differentiated reliably the three populations, revealing striking differences in the allele frequencies among the localities studied and a significant difference in population structure index (fst=0.1868, p<0.0001). the differences between populations within a same river were as significant as those between distinct hydrographic basins, indicating that the dam/reservoir represents an effective barrier to gene flow. additionally, environmental peculiarities from each locality are also believed to influence the genetic patterns detected herein. on the other hand, the similarity between samples from contas river and rec?ncavo sul basins could be related to a common evolutionary history, since both basins are geographically close to each other. finally, the present study shows that a multi-approach analysis is parti
Relations between the Perception of Communication Difficulties, Stress Levels and Behavior of Children with Autism Spectrum Disorders  [PDF]
Juliana Izidro Balestro, Cibelle Albuquerque de la Higuera Amato, Vanessa Sugawara, Isabela Gibello, Letícia Segeren, Fernanda Dreux M. Fernandes
Psychology (PSYCH) , 2016, DOI: 10.4236/psych.2016.712139
Abstract: The way that children are perceived by their families interferes with their experiences in society demanding that the parents’ perspectives are taken into account. The aim of this study was to identify the association among the autism symptoms reported by the parents of children with ASD, their perception of communication difficulties and the stress level reported by them. Participants were the parents of 19 children with ASD. They answered three questionnaires: the Autism Behavior Checklist, one questionnaire about their difficulties in communicating with their child and another about their stress level. Each domain of each questionnaire was correlated with all items of the other two. The results indicated that there was no association among the answers. These results suggest what parents of children with ASD perceive as difficulties when communicating with their child and their stress level is not associated with the severity of the symptoms they identify in their child. The parents’ perceptions about subjective issues of life reflect on how they cope with the specific needs of their children.
Aspectos funcionais da comunica??o: estudo longitudinal dos primeiros três anos de vida
la Higuera Amato, Cibelle Albuquerque de;Fernandes, Fernanda Dreux Miranda;
Jornal da Sociedade Brasileira de Fonoaudiologia , 2011, DOI: 10.1590/S2179-64912011000300015
Abstract: the aim of this multiple case-study is to present issues to the analysis and discussion of communicative development since the pre-verbal period. the case presentation starts with the description of the analyzed sample followed by the synthesis of data regarding the pragmatic aspects of six subjects, from the 1st to the 36th month of life. data regarding the number of communicative acts expressed per minute, occupation of the communicative space, proportion of use of the communicative means and the communication's interaction proportion are included. the individualized analysis of the number of communicative acts produced per minute in each sample shows an increasing tendency that is almost constant, but also frequent individual variations. the occupation of the communicative space has shown larger and more constant variations that, nevertheless, continue to evidence evolution. the longitudinal follow-up allowed the observation of the proportion of the use of the verbal communicative mean and its essential role in the child's communication from the 21st month on. since the 30th month the verbal mean is the more frequent but the gestural mean is still responsible for an important part of the communication initiated by the child. in what refer to the communication's interactivity, data show that the infant seek the interactivity since birth and that with age improve the quality and quantity of his/her communication's abilities.
O uso interativo da comunica??o em crian?as autistas verbais e n?o verbais
Amato, Cibelle Albuquerque de la Higuera;Fernandes, Fernanda Dreux Miranda;
Pró-Fono Revista de Atualiza??o Científica , 2010, DOI: 10.1590/S0104-56872010000400002
Abstract: background: communication of autistic children. aim: to assess the communication functionality of verbal and non-verbal children of the autistic spectrum and to identify possible associations amongst the groups. method: subjects were 20 children of the autistic spectrum divided into two groups: v with 10 verbal children and nv with 10 non-verbal children with ages varying between 2y10m and 10y6m. all subjects were video recorded during 30 minutes of spontaneous interaction with their mothers. the samples were analyzed according to the functional communicative profile and comparisons within and between groups were conducted. results: data referring to the occupation of communicative space suggest that there is an even balance between each child and his mother. the number of communicative acts per minute shows a clear difference between verbal and non-verbal children. both verbal and non-verbal children use mostly the gestual communicative mean in their interactions. data about the use of interpersonal communicative functions point out to the autistic children's great interactive impairment. conclusion: the characterization of the functional communicative profile proposed in this study confirmed the autistic children's difficulties with interpersonal communication and that these difficulties do not depend on the preferred communicative mean.
Um livro abrangente a respeito dos Distúrbios do Espectro do Autismo A comprehensive book on Autism Spectrum Disorders
Fernanda Dreux Miranda Fernandes,Cibelle Albuquerque de La Higuera Amato
Revista da Sociedade Brasileira de Fonoaudiologia , 2012, DOI: 10.1590/s1516-80342012000100020
Abstract:
Fonoaudiologia e autismo: resultado de três diferentes modelos de terapia de linguagem
Fernandes, Fernanda Dreux;Cardoso, Carla;Sassi, Fernanda Chiarion;Amato, Cibelle La Higuera;Sousa-Morato, Priscilla Faria;
Pró-Fono Revista de Atualiza??o Científica , 2008, DOI: 10.1590/S0104-56872008000400011
Abstract: background: language and communication disorders are essential features of the autistic spectrum disorders, and are part of the diagnostic criteria. aim: to verify the existence of observable differences in the functional communicative profile and in the social cognitive performance of autistic children and adolescents receiving language therapy in three different situations. assessment focused on the period of modified intervention and on the following period. method: subjects were children and adolescents with psychiatric diagnosis within the autistic spectrum. participants were divided in three groups according to the intervention received during a period of six months. results: determined observable differences, but not statistically significant. the group that presented the most progress was the one in which the subjects received therapy in pairs. the fact that none of groups presented a decrease in their progress indicators, as well as the fact that in a few situations the number of subjects who presented progress increased after this period was not expected. conclusion: the results of the present study reinforce that the procedures used to determine the individual abilities and inabilities were useful in planning the intervention procedures.
Experimental String Field Theory
Davide Gaiotto,Leonardo Rastelli
Physics , 2002, DOI: 10.1088/1126-6708/2003/08/048
Abstract: We develop efficient algorithms for level-truncation computations in open bosonic string field theory. We determine the classical action in the universal subspace to level (18,54) and apply this knowledge to numerical evaluations of the tachyon condensate string field. We obtain two main sets of results. First, we directly compute the solutions up to level L=18 by extremizing the level-truncated action. Second, we obtain predictions for the solutions for L > 18 from an extrapolation to higher levels of the functional form of the tachyon effective action. We find that the energy of the stable vacuum overshoots -1 (in units of the brane tension) at L=14, reaches a minimum E_min = -1.00063 at L ~ 28 and approaches with spectacular accuracy the predicted answer of -1 as L -> infinity. Our data are entirely consistent with the recent perturbative analysis of Taylor and strongly support the idea that level-truncation is a convergent approximation scheme. We also check systematically that our numerical solution, which obeys the Siegel gauge condition, actually satisfies the full gauge-invariant equations of motion. Finally we investigate the presence of analytic patterns in the coefficients of the tachyon string field, which we are able to reliably estimate in the L -> infinity limit.
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