Eficácia do herbicida oxyfluorfen com a cobertura de palha no controle de plantas daninhas

A palha pode alterar a dinâmica do herbicida oxyfluorfen no sistema de cana-crua; assim, este trabalho teve por objetivo avaliar a eficácia do oxyfluorfen em condições de casa de vegetação, com a cobertura de palha, no controle das plantas daninhas que ocorrem em cana-crua. Foram avaliadas as espécies de Brachiaria decumbens, Ipomoea grandifolia, Ipomoea quamoclit e Merremia cissoides. A dose utilizada do oxyfluorfen foi de 3 L ha-1 (720 g i.a. ha-1). Os tratamentos constaram de diferentes posicionamentos do herbicida e condições antes e após a aplicação. A porcentagem de controle das plantas daninhas foi avaliada aos 12, 20, 26, 33 e 38 DAA. Os maiores índices de controle aos 38 DAA, independentemente da planta daninha estudada, foram alcançados quando se aplicou oxyfluorfen em tratamentos com a presença de palha em cobertura, com ou sem umidade. No entanto, os resultados obtidos nos demais tratamentos mostraram-se eficientes no controle das diferentes espécies de plantas daninhas estudadas.

Comparative electrical behavior at low and high current of SnO(2)- and ZnO-based varistors

The complete I-V characteristics of SnO(2)-based varistors, particularly of the Pianaro system SCNCr consisting in 98.9%SnO(2)+1%CoO+0.05%Nb(2)O(5)+0.05%Cr(2)O(3), all in mol%, have been seldom reported in the literature. A comparative study at low and high currents of the nonohmic behavior of SCNCr- and ZnO-based varistors (modified Matsuoka system) is proposed in this work. The SCNCr system showed higher nonlinearity coefficients in the whole range of measured current. The electrical breakdown field (E(b)) was twice as high for the SCNCr system (5400 V/cm) than for the ZnO varistor (2600 V/cm) due to a smaller average grain size of the former (4.5 mu m) with respect to the latter (8.5 mu m). Nevertheless, we consider that another important factor responsible for the high E(b) in the SCNCr system is the great number of electrically active interfaces (85%) as determined with electrostatic force microscopy (EFM). It was also established that the SCNCr system might be produced in disks of smaller dimensions than that of commercial ZnO-based product, with a 5.0 cm(-1) minimal area-volume (A/V) ratio. The SCNCr reached the saturation current in a short time because of the high resistivity of the grains, which is five times higher than that of the grains in ZnO-based varistors.

Potencial de aplicação do processo foto-fenton/solar como pré-tratamento de efluente da indústria de laticínios

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise sensorial: um estudo sobre procedimentos estatísticos e número mínimo de julgadores

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

HPV16-associated tumors control myeloid cell homeostasis in lymphoid organs, generating a suppressor environment for T cells

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

O fantástico traduzido: uma análise baseada em corpus paralelo e reflexões para uma pedagogia da tradução

This paper presents the analysis and the methodological procedures adopted in order to compile a parallel corpus comprised of two short stories by David Roas (2007; 2010), originally written in Spanish “Tránsito” and “Das Kapital”, and their translation into Portuguese carried out both by a native speaker of Spanish (fluent in Portuguese) and a native speaker of Portuguese (fluent in Spanish). We analyzed the texts translated by them, focusing on the most frequent vocabulary and its semantic implications on their respective contexts. The theoretical and methodological approach was based on corpus linguistics, corpus based translation studies (BAKER, 1996; HUNSTON, 2002; LAVIOSA, 2002; BERBER SARDINHA, 2004; MEYER, 2004; OLOHAN, 2004) and some concepts from Fantastic Literature (ROAS, 2001, 2011; TODOROV, 2003; ALAZRAKI, 2001). The data were extracted by using the WordSmith Tools Suite®. Results show that dialogue and focus on lexicon, making use of computer corpus, play an important role in understanding the translation process. It is also important to mention that while exploring translation possibilities presented by the two translators this approach unlocked a window to reflect on translation pedagogy based on corpus.

A corporeidade infantil edificada por tempos e espaços escolares

This paper has as its theme the relationship between child corporeity and school culture. The purpose is thus to discuss the school culture, in its dimensions to school times and spaces and to reflect on the influence of these dimensions in the construction of children corporeity who attending primary and the first grade of nine year elementary school.

Association of ADIPOQ, OLR1 and PPARGC1A gene polymorphisms with growth and carcass traits in Nelore cattle

In beef cattle farming, growth and carcass traits are important for genetic breeding programs. Molecular markers can be used to assist selection and increase genetic gain. The ADIPOQ, OLR1 and PPARGC1A genes are involved in lipid synthesis and fat accumulation in adipose tissue. The objective of this study was to identify polymorphisms in these genes and to assess the association with growth and carcass traits in Nelore cattle. A total of 639 animals were genotyped by PCR-RFLP for rs208549452, rs109019599 and rs109163366 in ADIPOQ, OLR1 and PPARGC1A gene, respectively. We analyzed the association of SNPs identified with birth weight, weaning weight, female yearling weight, female hip height, male yearling weight, male hip height, loin eye area, rump fat thickness, and backfat thickness. The OLR1 marker was associated with rump fat thickness and weaning weight (P < 0.05) and the PPARGC1 marker was associated with female yearling weight.

Low frequency of Y anomaly detected in Australian Brahman cow-herds

Indicine cattle have lower reproductive performance in comparison to taurine. A chromosomal anomaly characterized by the presence Y markers in females was reported and associated with infertility in cattle. The aim of this study was to investigate the occurrence of the anomaly in Brahman cows. Brahman cows (n = 929) were genotyped for a Y chromosome specific region using real time-PCR. Only six out of 929 cows had the anomaly (0.6%). The anomaly frequency was much lower in Brahman cows than in the crossbred population, in which it was first detected. It also seems that the anomaly doesn't affect pregnancy in the population. Due to the low frequency, association analyses couldn't be executed. Further, SNP signal of the pseudoautosomal boundary region of the Y chromosome was investigated using HD SNP chip. Pooled DNA of non-pregnant and pregnant cows were compared and no difference in SNP allele frequency was observed. Results suggest that the anomaly had a very low frequency in this Australian Brahman population and had no effect on reproduction. Further studies comparing pregnant cows and cows that failed to conceive should be executed after better assembly and annotation of the Y chromosome in cattle.

Teste de aceitação em amostras de cachaça: avaliação de métodos estatísticos e de número mínimo de julgadores

Based on data of global impression acceptance tests of 4 cachaças samples, sensory evaluated by 120 judges, statistical parametric and non-parametric proceedings were compared. In this way, based on the sensory acceptance obtained data, 5400 systematic samples were created with different judges numbers and submitted to the established statistical proceedings. The obtained results showed that ANOVA, with two factors and Friedman tests, were equivalent to determine signifi cant differences among the cachaça samples, and in relation to the number of judges, the results pointed out 45 as the minimum necessary to detect signifi cative differences.