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Comportamento de variedades de cana-de-açúcar (Saccharum spp.) em inoculações com diferentes concentrações de Leifsonia xyli subsp. xyli
(Universidade Federal de São Carlos, 2010-09-30) Brumatti, Catiana Regina; Vieira, Marcos Antonio Sanches; https://lattes.cnpq.br/7031724562598209; https://lattes.cnpq.br/2447176138980567
The sugar cane is a semiperennial plant currently considered one of the most important crops in the world due to its ability to produce renewable energy (ethanol) and sugar. The soil quality, water availability and temperature are the main effects that made Brazil the largest producer. However some factors influence the sugarcane productivity, mainly diseases. Among them we can cite the ratoon stunting disease caused by the bacteria Leifsonia xyli subsp. xyli worldwide known to cause up-to-30% losses in the productivity. The spread of infected seedlings and the absence of external symptoms make it difficult to diagnose and require the use of laboratory techniques. Thermotherapy, cutting-material cleaning with detergent solutions and the use of resistant varieties are the key measures to contain the disease. Due to its easy spread and high rates of reduction in the productivity the objective of this study was to evaluate how the effect of four different concentrations of Lxx for four cuts, would affect the interaction varieties x cuts x bacterial concentration. Therefore it evaluates possible losses on the technological variants and the reliability of Dot blot test for the PCR from DNA extraction according to the protocol of CTAB. The analyzed data showed no significant reduction in varieties productivity in none of the four different bacterial concentrations including the control plants, as well as in technological variables on study. According to data the Dot blot technique was more sensitive than the PCR conditions utilized in this study.
Prematuridade e baixo peso em pré-escolares: fatores de risco ao desenvolvimento da linguagem e alterações fonológico-lexicais
(Universidade Federal de São Carlos, 2010-09-30) Iemma, Elisa Pinhata; Martinez, Claudia Maria Simões; https://lattes.cnpq.br/0357988408477189
The expressive number of premature births shows the necessity of measures focused in preventing disorders in these children development. Literature reveals that language is one of the areas that may be affected when the child is exposed to risk factors. Considering language as the predictor of academic intelligence and skills, it becomes relevant to study the phonological and lexical aspects of preschool children with historical of prematurity and low birth weight. Supposedly, these children may present faults in this repertory in the moments that precede their formal schooling. This research received the approval of the Ethics Committee of the Federal University of São Carlos. It reports a descriptive study which aimed to detect language alterations/disorders in preterm born children with low weight which go to preschool. The following instruments were used to collect data: Critério de Classificação Econômica Brasil (2008); maternity house medical records, Screening Test Development Denver II (TSDD-II) and ABFW test. The participants in this study were 19 children between 3 and 5 years-old with historical of prematurity and low weight that required neonatal ICU after birth and are enrolled in the Public System of Child Education (Municipal Kindergarten). The results present, initially, the profile of the study sample with data from the children clinical history and their socio economic situation. The results yet reveal that in the Denver Test (TSDD-II), language was, among four other areas, the most affected. In this situation, 9 of the 19 children under evaluation have presented risk. Regarding the ABFW test performance, it is stressed that all the participants have presented risks. Regarding the phonological aspects, 8 children have presented an altered performance in the phonologic test. All the participants presented vocabulary deficiency. By analyzing language, 5 of the 19 children had faults in the phonologic areas of ABFW and of vocabulary, as well as the presence of risk in the language area in TSDD-II. The importance of the evaluation procedures and the language development accompaniment of this population in the moments that precede litaracy as preventive measures is being largely discussed, as well as the contributions of the ABFW test as an instrument that allows not only to situate the deficits but also, based on these deficits, to elaborate strategies of intervention for parents and teachers. The data related to clinical history and socio economic level were used to make interpretations of the similarities and differences in the scores found in both instruments from the concepts of risk, protection and resilience. The small number of participants can be pointed out as a limitating factor of this paper. For future studies it is suggested the conduct of follow-up and the development of intervention programs directed to parents and teachers in the perspective to prevent or minimize communicative deficits.
Reconhecimento de padrões de imagens de traços nucleares produzidos por partículas alfa em detectores de estado sólido
(Universidade Federal de São Carlos, 2010-09-30) Trindade, Ananda Coaglia; Cruvinel, Paulo Estevão; https://lattes.cnpq.br/7924553462118511; https://lattes.cnpq.br/8774079177150720
This work presents a new technique for image analysis generated by alpha particles in solid state nuclear track detectors using Hough Transform to identify complete standards and Artificial Neural Networks which act as classifiers of incomplete standards. Radon, during their decay process emits alpha particles that may be registered in detector of certain materials as inorganic crystals, plastic or glass. Through these detectors is possible to obtain images generated by alpha particles and therefore calculate the concentration of radon in an environment. Radon and its decay products contribute to the majority of ionizing radiation received by worldwide population, particularly in indoor environments. Studies carried out over the years confirmed the association between radon exposure and lung cancer. Considering the importance of studies related to radon, the need arises to explore the existing techniques to obtain the concentration of radon indoors and create new techniques that are better adapted to current needs.