Desempenho de laranjeiras em Capitão Poço, PA.

O estudo teve como objetivo avaliar o comportamento de 13 variedades de laranjeiras (Citrus sinensis (L.) osbeck) nas condições edafoclimáticas de Capitão Poço, PA, a fim de selecionar aquelas superiores para caracteres de interesse agronômico e econômico. O trabalho foi desenvolvido em solo tipo Latossolo Amarelo distrófico, clima tipo Ami da classificação de Köppen, sendo avaliadas as variedades de laranjeiras, PêraD6; Sunstar; Pinneaple; Parson Brown; Westin; Gardner; BaianinhaIAC79; Valênciacnpmf27; Natalcnpmf112; Salustiana; Rubi; Midsweet; e Seleta. Os dados foram coletados em plantas com 4 anos de idade, sendo estes: produção de frutos por planta e por safra; peso do fruto e do suco; espessura da casca e diâmetros transversal; e longitudinal do fruto. Do suco, determinaram-se a acidez total titulável, sólidos solúveis totais, pH e relação sólidos solúveis totais/acidez total titulável. Detectaram-se diferenças significativas (p<0,05) para produção de frutos e espessura de casca, e altamente significativas (p<0,01) para peso do fruto e do suco e diâmetros transversal e longitudinal. Os resultados demonstraram que as cultivares se adaptaram bem às condições edafoclimáticas da região produtora de Capitão Poço, e que é possível produzir, na região, frutos que possam ser destinados a indústrias processadoras de suco concentrado e congelado, e que as laranjeiras Westin, BaianinhaICA 79, Pinneaple e Rubi poderão compor os sistemas de produção, cujo destino seja produzir frutos para o mercado de consumo "in natura".bitstream/item/37708/1/ORIENTAL-BPD57.pdfVersão eletrônica. 1ª impressão: 2009

Complexity-Entropy Causality Plane as a Complexity Measure for Two-dimensional Patterns

Complexity measures are essential to understand complex systems and there are numerous definitions to analyze one-dimensional data. However, extensions of these approaches to two or higher-dimensional data, such as images, are much less common. Here, we reduce this gap by applying the ideas of the permutation entropy combined with a relative entropic index. We build up a numerical procedure that can be easily implemented to evaluate the complexity of two or higher-dimensional patterns. We work out this method in different scenarios where numerical experiments and empirical data were taken into account. Specifically, we have applied the method to i) fractal landscapes generated numerically where we compare our measures with the Hurst exponent; ii) liquid crystal textures where nematic-isotropic-nematic phase transitions were properly identified; iii) 12 characteristic textures of liquid crystals where the different values show that the method can distinguish different phases; iv) and Ising surfaces where our method identified the critical temperature and also proved to be stable.Comment: Accepted for publication in PLoS On

Should We Continue to Measure Endometrial Thickness in Modern-Day Medicine? The Effect on Live Birth Rates and Birth Weight

The evaluation of endometrial thickness (EMT) is still part of standard cycle monitoring during IVF, despite the lack of robust evidence of any value of this measurement to predict little revalidation in contemporary medical practice; other tools, however, such as endocrine profile monitoring, have become increasingly popular. The aim of this study was to reassess whether EMT affects the outcome of a fresh embryo transfer in modern-day medicine, using a retrospective, single-centre cohort of 3350 IVF cycles (2827 women) carried out between 2010 and 2014. In the multivariate regression analysis, EMT was non-linearly associated with live birth, with live birth rates being the lowest with an EMT less than 7.0 mm (21.6%; P < 0.001) and then between 7.0 mm and 9.0 mm (30.2%; P = 0.008). An EMT less than 7.0 mm was also associated with a decrease in neonatal birthweight z-scores (-0.40; 95% CI -0.69 to -0.12). In conclusion, these results reaffirm the use of EMT as a potential prognostic tool for live birth rates and neonatal birthweight in contemporary IVF, namely when considered together with other ovarian stimulation monitoring methods, such as the late-follicular endocrine profile.info:eu-repo/semantics/publishedVersio

Procedure for Sr and Nd isotope analysis in the terrigenous component of marine sediments

Neste trabalho, apresenta-se um protocolo analítico para a obtenção das razões isotópicas 87Sr/86Sr e 143Nd/144Nd na fracção detrítica de sedimentos marinhos. Dado ser comum estes materiais apresentarem uma fracção biogénica carbonatada significativa, foram testadas diversas metodologias com o objectivo de extrair selectivamente os carbonatos sem comprometer a composição da componente terrígena. O ataque com ácido acético 5N durante 12h, à temperatura ambiente, revelou ser eficaz na remoção dos carbonatos e, simultaneamente, preservar fases detríticas que incorporam concentrações significativas de lantanídeos. A aplicabilidade do protocolo desenvolvido é ilustrado com a análise isotópica de amostras de um core colhido no talude continental da Galiza. Os resultados obtidos, em ambos os sistemas de decaimento radioactivo, para além de serem consistentes com a assinatura isotópica de materiais resultantes da erosão de crosta continental, também permitem detectar, através do decréscimo dos valores de εNd em determinados níveis do core, alguns episódios (eventos de Heinrich) em que a fonte crustal terá sido bastante diferente da habitual.In this paper, an experimental procedure for measuring 87Sr/86Sr and 143Nd/144Nd ratios in the detrital fraction of marine sediments is presented. Since these sediments commonly include a significant biogenic carbonate fraction, several methodologies were tested in order to leach the carbonates without compromising the composition of the terrigenous component. The extraction with 5N acetic acid for 12 hours, at room temperature, reveals (a) to be effective in the removal of carbonates, and (b) to preserve detrital phases that incorporate important amounts of REE. The applicability of this chemical procedure is illustrated with analyses done on samples from a core collected in the Galician continental slope. The results for both radiogenic decay systems, on one hand, are consistent with the isotope signature of material resulting from the erosion of continental crust and, one the other hand, allow the identification of several episodes of modification of the source areas involved

Metal-Insulator Transition in a Disordered Two-Dimensional Electron Gas in GaAs-AlGaAs at zero Magnetic Field

A metal-insulator transition in two-dimensional electron gases at B=0 is found in Ga(Al)As heterostructures, where a high density of self-assembled InAs quantum dots is incorporated just 3 nm below the heterointerface. The transition occurs at resistances around h/e^2 and critical carrier densities of 1.2 10^11cm^-2. Effects of electron-electron interactions are expected to be rather weak in our samples, while disorder plays a crucial role.Comment: 4 pages, 3 figures, 21 reference

Avaliacao de cultivares de mandioca na microrregiao do Medio Gurgueia - Piaui.

bitstream/item/97039/1/PAND220001.pd

Universal patterns in sound amplitudes of songs and music genres

We report a statistical analysis over more than eight thousand songs. Specifically, we investigate the probability distribution of the normalized sound amplitudes. Our findings seems to suggest a universal form of distribution which presents a good agreement with a one-parameter stretched Gaussian. We also argue that this parameter can give information on music complexity, and consequently it goes towards classifying songs as well as music genres. Additionally, we present statistical evidences that correlation aspects of the songs are directly related with the non-Gaussian nature of their sound amplitude distributions.Comment: Accepted for publication as a Brief Report in Physical Review