Abstract The production of high-quality seedlings is one of the most important steps for the recovery of degraded areas, given that the quality of the seedling is a factor that interferes with the success and costs of the recovery. Thus, the present study aimed to evaluate the effect of phosphorus (P) fertilization and inoculation with arbuscular mycorrhizal fungi (AMFs) on the growth, biomass production, and seedling quality of Peltophorum dubium. The experiment was carried out in a completely randomized design, in a 5 × 3 factorial scheme, with five doses of P (0, 50, 100, 200, and 400 mg kg-1) and three microbiological treatments (inoculated with Rhizophagus clarus, Gigaspora margarita, and a control without inoculation), with four replicates, totaling 60 experimental units. The following response variables were evaluated: mycorrhizal colonization, morphological characteristics, and the quality of seedlings produced 120 days after transplanting. P. dubium did not demonstrate root colonization in response to inoculation with R. clarus or G. margarita. All the morphological characteristics evaluated in the present study showed a quadratic response to the application of P, except for the shoot dry mass/roots dry mass, which obtained a maximum point of 3,90 g g- 1 at a dose of 400 mg kg-1 . The inoculation with R. clarus and G. margarita did not influence any of the attributes evaluated in P. dubium . Phosphate fertilization was beneficial for the growth, biomass production, and quality of P. dubium seedlings, and the application of P between 218 mg kg-1 and 295 mg kg-1 is recommended.

Resumo A produção de mudas de qualidade superior é um dos pontos mais importantes para a recuperação de áreas degradadas, dado que a qualidade da muda é um fator que interfere no sucesso e nos custos da recuperação. Assim, o presente estudo objetivou avaliar o efeito da fertilização com fósforo (P) e a inoculação com fungos micorrízicos arbusculares (FMAs) no crescimento, produção de biomassa e qualidade de mudas de Peltophorum dubium. O delineamento experimental utilizado foi o inteiramente casualizado, em esquema fatorial 5 x 3, sendo avaliadas cinco doses de P (0, 50, 100, 200 e 400) mg kg-1 e três tratamentos microbiológicos (inoculado com Rhizophagus clarus, Gigaspora margarita e um controle sem inoculação), com quatro repetições, totalizando 60 vasos. Foram avaliados a colonização micorrízica, características morfológicas e a qualidade das mudas produzidas aos 120 dias após o transplantio. P. dubium não demonstrou colonização radicular em resposta à inoculação com R. clarus e G. margarita. Todas ases características morfológicas avaliadas no presente estudo apresentaram comportamento quadrático em função da aplicação de P, exceto a relação massa seca da parte aérea / massa seca de raízes (MSPA/MSR), a qual obteve ponto de máxima de 3,90 g g-1 na dose 400 mg kg-1. A inoculação com R. clarus e G. margarita não influenciou nenhum dos atributos avaliados nas mudas de P. dubium. A adubação fosfatada foi benéfica para o crescimento, produção de biomassa e qualidade das mudas de P. dubium, sendo recomendada a aplicação de P entre 218 mg kg-1 e 295 mg kg-1.

Resumo Relatamos aqui o caso de E.R.S.S., feminino, 43 anos, diagnosticada com coloboma de retina e coroide bilateral, afim de enfatizar a importância dos exames pré-operatórios, até mesmo de uma boa tomada de projeção luminosa, a qual está sendo muitas vezes relegada a um patamar desprezível dentro da prática oftalmológica. Salientamos também que o exame ultrassonográfico prévio à indicação cirúrgica é de suma importância, no entanto, esse deve ser realizado por profissional experiente e sua correta interpretação deve ser exaustivamente procurada para que erros interpretativos não se transformem em conduta clínico cirúrgica inadequada e consequentes danos, muitas vezes, irreparáveis. Considerando-se todos os aspectos e complicações do coloboma já citados nesse relato, a conduta diante de um diagnóstico dessa malformação deve ser: pesquisar associação com outras doenças oculares e/ou sistêmicas (CHARGE: coloboma, cardiopatia congênita, atresia de coana com múltiplas anomalias), realizar tratamento e acompanhamento em caso de complicações (Ex. descolamento de retina, ambliopia e estrabismo) e prevenção é feita através de aconselhamento genético.

Abstract We report here the case of E.R.S.S. female, 43 years old, diagnosed with bilateral coloboma of choroid and retina, in order to emphasize the importance of preoperative exams, even a good shot of light projection, which is often being relegated to a negligible level in ophthalmological practice.We emphasize also that the ultrasound examination prior to the surgical indication is of paramount importance, however,this should be performed by experienced professional and the correct interpretation must be thoroughly searched for interpretative errors not become inadequate surgical clinical conduct and consequential irreparable damage. Considering all aspects and complications already mentioned in this report, coloboma to conduct before a diagnosis of this malformation should be: search for association with other eye diseases and/or systemic (CHARGE: coloboma, congenital heart defect, atresia of posterior nasal apertures with multiple anomalies), performing and monitoring treatment in case of complications (E.g. retinal detachment, amblyopia and strabismus) and prevention is made through genetic counseling.

O Enterolobium contortisiliquum é uma leguminosa arbórea que associada a fungos micorrízicos arbusculares (FMAs) pode ser utilizada na recuperação de áreas degradadas. Objetivou-se avaliar o efeito da inoculação com FMAs e doses de fósforo (P) sobre o crescimento, absorção de nitrogênio (N) e P em plantas jovens de E. contortisiliquum. Utilizou-se o delineamento de blocos casualizados em esquema fatorial 5 x 3, sendo os fatores doses de P (0, 50, 100, 200 e 400 mg kg-1 ) e inoculação com FMAs (Gigaspora margarita e população nativa da rizosfera de plantas de E. contortisiliquum) ou não inoculado (controle) com quatro repetições por tratamento. A maior colonização micorrízica (35%) ocorreu em plantas inoculadas com G. margarida. Aos 30 dias após sementeira, nas doses 0 e 50 mg kg-1 de P, plantas inoculadas com G. margarita tiveram incremento em altura de 19,5% e 7,4%, respectivamente, em relação ao tratamento controle. Os teores de P da parte aérea de plantas inoculadas com G. margarita, nas doses 0, 50, 100 e 400 mg kg-1 de P, tiveram incrementos de 198%, 108%, 181% e 106%, respectivamente, em comparação ao controle. No solo sem aplicação de P, plantas inoculadas com G. margarita tiveram maior eficiência (34,89%) e dependência micorrízica (25,53%).

Enterolobium contortisiliquum is a leguminous tree that associates by symbiosis with arbuscular mycorrhizal fungi (AMF) and can be used to recover degraded areas. Therefore, the aim of this work was to evaluate the effects of AMF inoculation, supply of phosphorus (P), and rate of nitrogen (N) and P absorption in E. contortisiliquum. The variables were analyzed into randomized blocks with factorial design 5 x 3, in which the factors were levels of P (0, 50, 100, 200, and 400 mg kg-1), and inoculation with AMF (Gigaspora margarita and native population in soil), or non-inoculation (control treatment), with four repetitions in each treatment. The highest mycorrhizal colonization (35%) occurred in seedlings inoculated with G. margarita. Plants inoculated with G. margarita and under P supply of 0 and 50 mg kg-1 exhibited increase in height of 19.5% and 7.4%, respectively, compared to the control treatment. P levels in aerial part of plants inoculated with G. margarita, under levels of 0, 50, 100 and 400 mg kg-1 of P presented high increment of 198%, 108%, 181% and 106%, respectively, compared to the control. The control treatment, without any P supply, seedlings inoculated with G. margarita exhibited high colonization efficiency (34.89%) and high mycorrhizal dependence (25.53%).

ABSTRACT Nanotechnology can significantly improve the mechanical strength and durability of concrete. At the nanoscale, good dispersion of constituent materials is an essential factor for the improvement of concrete properties. In this scenario, the objective of this research was to evaluate the mechanical properties of high performance concrete containing stabilized nano-silica. The incorporation of nano-silica to the polycarboxylate chemical admixture allowed its application in concrete, since the nano-silica was evenly dispersed in the concrete mass. For this study, three different concretes were employed: a reference concrete, one containing stabilized nano-silica and another containing a mixture of silica fume and stabilized nano-silica. The evaluated concrete mechanical properties were the axial compressive strength and secant modulus of elasticity measured in three different ages. The results indicated a substantial increase in concrete compressive strength and modulus of elasticity with the addition of stabilized nano-silica combined with a reduction in cement content. The results also showed that use of stabilized nano-silica proved to be very advantageous, especially when mixed with silica fume. When they were combined, a synergy effect occurred in the concrete that was of chemical nature in addition to the physical effect of better concrete particle packaging. Analysis by scanning electron microscopy showed the improvement in microstructure of concretes with stabilized nano-silica, which contributed to gains in mechanical properties.

The aim of this paper is to illustrate the active control of vibration of a flexible structure using a model-based digital controller. The state-space model of the system is derived using a system identification technique known as the Observer/Kalman Filter Identification (OKID) method together with Eigensystem Realization Algorithm (ERA). Based on the measured response of the structure to a random input, an explicit state-space model of the equivalent linear system is determined. The model is used in a Linear Quadratic Regulator (LQR) to control the first two modes of vibration of a cantilever beam using a piezoelectric actuator/sensor pair. Experimental results demonstrate the efficacy of the proposed approach.

This paper presents a design of adaptive fuzzy controllers applied to the control of vibrations in flexible structures containing distributed piezoelectric actuator patches. The adaptive fuzzy controller is constructed from a set of fuzzy IF-THEN rules whose parameters are adjusted on-line according to some adaptation law. The adaptive law is derived based on the Lyapunov's stability theory. This control methodology is experimentally verified in a steel cantilever test beam and a set of experimental tests are made in the system to verify the efficiency of the adaptive fuzzy controller proposed.

RESUMO Foram estudados 11 casos de melanoma de coróide, diagnosticados ecograficamente e através de estudo histopatológico. Concluiu-se ser a ecografia "A" estandartizada de grande importância no diagnóstico do tumor, permitindo inclusive informações sobre o tipo histológico do melanoma.

SUMMARY The authors present a comparison between ecography and histopathology in choroidal melanomas (11 patients). The conclusion is that "A" standard echography is useful to make the diagnosis and its findings are also related to the histopathology of the choroidal melanoma.