Contribuição para a construção de um modelo matemático da produção da pêra "Rocha"

Trabalho apresentado no 1.º Simpósio Nacional de Fruticultura que decorreu em Alcobaça de 12 a 13 de Outubro de 2006 e que foi organizado pela Associação Portuguesa de Horticultura.Neste trabalho, apresentam-se resultados preliminares relativos a alguns sub-modelos da produção de pêra ‘Rocha’: crescimento do fruto, relação entre a carga de frutos e a produção da árvore, influência do volume da copa (compasso de plantação, idade) na produtividade de árvores e pomares

O REGIME DIFERENCIADO DE CONTRATAÇÕES PÚBLICAS (RDC) NO INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DE SANTA CATARINA (IFSC)

O Regime Diferenciado de Contratações Públicas (RDC) é uma nova modalidade de licitação, instituída no Direito Administrativo Brasileiro pela Lei nº 12.462/2011 (BRASIL, 2011a), em razão dos grandes eventos esportivos sediados no país de 2013 à 2016. O artigo tem como objetivos analisar as inovações e polêmicas da Lei do RDC, compará-las com os procedimentos e modalidades das Leis nº 8.666/1993 (BRASIL, 1993) e 10.520/2002 (BRASIL, 2002) e avaliar quanto às vantagens de sua utilização na prática do Instituto Federal de Educação, Ciência e Tecnologia de Santa Catarina (IFSC). Portanto, trata-se de um estudo de caso, com abordagem qualitativa e dados quantitativos, auxiliado pelo método procedimental comparativo, conjugado à pesquisa descritiva, bibliográfica e documental. A principal fonte de informações foram os processos licitatórios do IFSC, realizados pela modalidade RDC no período de 2010 a 2014. Com a experiência do IFSC, conclui-se que o RDC é mais eficiente que a Lei 8.666/93 (BRASIL, 1993), por tal motivo ele é reconhecido pelo TCU e apoiado pela CGU, consagrando-se por ser menos burocrático, célere, competitivo e mais transparente

Phytochemicals under organic and low input crop production systems – Potential influ-ences on health and nutrition in humans and animals

Phytochemicals (plant secondary metabolites) have received considerable interest in the last three decades in relation to their biosynthetic regulation in plants and also their health effects in animals and humans. There is increasing evidence from epi-demiological data, from in vitro cell studies, and from animal and human intervention studies that certain phytochemicals can significantly affect nutrition and health. Some of these effects are positive (e.g. reduc-tions in the risk of developing cancers, coronary heart disease and immune dysfunctions) whereas others can be negative (e.g. toxic non-protein amino acids and pro-carcinogenic furanocoumarins). Levels of phytochemicals and other plant defence compounds are modulated by many genotype-independent factors such as light, water, CO2, oxygen and ozone, nutrient supply, pesticides, levels of diseases and herbivore damage. Therefore different production methods for crops (conventional, low input and organic) have the potential to significantly affect the levels of the phy-tochemicals in the crops, and subsequently affect health and nutrition in the consumer

Nutrients, antinutrients, phenolic composition, and antioxidant activity of common bean cultivars and their potential for food applications

Phaseolus vulgaris L. is the most commonly consumed legume in the world, given its high vegetable protein content, phenolic compounds, and antioxidant properties. It also represents one of the most sustainable, low-carbon and sources of food available at present to man. This study aims to identify the nutrients, antinutrients, phenolic composition, and antioxidant profile of 10 common bean cultivars (Arikara yellow, butter, cranberry, red kidney, navy, pinto, black, brown eyed, pink eyed, and tarrestre) from two harvest years, thereby assessing the potential of each cultivar for specific applications in the food industry. Navy and pink eyed beans showed higher potential for enrichment of foodstuffs and gluten-free products due to their higher protein and amino acid contents. Additionally, red kidney, cranberry and Arikara yellow beans had the highest content of phenolic compounds and antioxidant properties, which can act as functional ingredients in food products, thus bringing health benefits. Our study highlights the potential of using specific bean cultivars in the development of nutrient-enriched food and as functional ingredients in diets designed for disease prevention and treatment.publishersversionpublishe

A comparison of baleen whale density estimates derived from overlapping satellite imagery and a shipborne survey

As whales recover from commercial exploitation, they are increasing in abundance in habitats that they have been absent from for decades. However, studying the recovery and habitat use patterns of whales, particularly in remote and inaccessible regions, frequently poses logistical and economic challenges. Here we trial a new approach for measuring whale density in a remote area, using Very-High-Resolution WorldView-3 satellite imagery. This approach has capacity to provide sightings data to complement and assist traditional sightings surveys. We compare at-sea whale density estimates to estimates derived from satellite imagery collected at a similar time, and use suction-cup archival logger data to make an adjustment for surface availability. We demonstrate that satellite imagery can provide useful data on whale occurrence and density. Densities, when unadjusted for surface availability are shown to be considerably lower than those estimated by the ship survey. However, adjusted for surface availability and weather conditions (0.13 whales per km2, CV = 0.38), they fall within an order of magnitude of those derived by traditional line-transect estimates (0.33 whales per km2, CV = 0.09). Satellite surveys represent an exciting development for high-resolution image-based cetacean observation at sea, particularly in inaccessible regions, presenting opportunities for ongoing and future research

The boomerang effect of radicalism in Discursive Psychology: A critical overview of the controversy with the Social Representations Theory.

This article provides a critical overview of the controversy between the Radical approach to Discursive Psychology (RDP) and the Social Representations Theory (SRT) and aims: a)?to show what is potentially complementary and contradictory in Discursive Psychology (DP) and the Social Representations Theory, when and why they are incompatible, and whether and how it is possible and/or desirable to integrate these two approaches. b)?to describe how the radicalism of the socio-constructionist thesis upheld by Discourse Analysis can give rise to several hard-to-solve problems, which may then be translated into a boomerang effect. In the final section, it highlights interest in dialog and “cross-fertilization” between researchers inspired by the less radical approach to discursive psychology and those inspired by the Social Representations Theory, pointing out the effect of methodological implications that would ensue

Electrochemical sensing of ecstasy with electropolymerized molecularly imprinted poly(o-phenylenediamine) polymer on the surface of disposable screen-printed carbon electrodes

This study demonstrates the ability of an electrochemical sensor based on molecularly imprinted polymers (MIPs) to selectively quantify 3,4-methylenedioxymethamphetamine (MDMA), also known as ecstasy, in biological samples. The device was constructed using ortho-phenylenediamine (o-PD) as the MIP’s building monomer at the surface of a screen-printed carbon electrode (SPCE). The step-by-step construction of the SPCE-MIP sensor was characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Density functional theory (DFT) calculations and modelling were performed not only to understand template-monomer interaction but also to comprehend which possible polymer structure - linear or ramified poly(o-PD) – indeed interacts with the analyte. The prepared sensor worked by directly measuring the MDMA oxidation signal through square-wave voltammetry (SWV) after an incubation period of 10 min. Several parameters were optimized, such as the monomer/template ratio, the number of electropolymerization scanning cycles, and the incubation period, to obtain the best sensing efficiency. Optimized sensors exhibited suitable selectivity, repeatability (2.6%), reproducibility (7.7%) and up to one month of stable response. A linear range up to 0.2 mmol L−1 was found with an r2 of 0.9990 and a limit of detection (LOD) and quantification (LOQ) of 0.79 and 2.6 μmol L−1 (0.15 and 0.51 μg mL−1), respectively. The proposed sensor was successfully applied to human blood serum and urine samples, showing its potential for application in medicine and in forensic sciences.This work received financial support from FCT/MCTES through national funds and was co-financed by FEDER, under Partnership Agreement PT2020-UID/QUI/50006/2013-POCI/01/0145/FEDER/007265. RASC wishes to acknowledge FCT for her PhD fellowship (PD/BD/127797/2016) from the PhD Programme in Medicines and Pharmaceutical Innovation (i3DU). AACB (grants 2014/25770-6 and 2015/01491-3) and LMG (grant 2018/14425-7) thank the São Paulo Research Foundation (FAPESP) for financial support. AACB (grant 309715/2017-2) also thanks the Brazilian National Research Council (CNPq) for financial support and fellowships. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.info:eu-repo/semantics/publishedVersio

The long-lived Type IIn SN 2015da: Infrared echoes and strong interaction within an extended massive shell star star star

In this paper we report the results of the first similar to four years of spectroscopic and photometric monitoring of the Type IIn supernova SN 2015da (also known as PSN J13522411+3941286, or iPTF16tu). The supernova exploded in the nearby spiral galaxy NGC 5337 in a relatively highly extinguished environment. The transient showed prominent narrow Balmer lines in emission at all times and a slow rise to maximum in all bands. In addition, early observations performed by amateur astronomers give a very well-constrained explosion epoch. The observables are consistent with continuous interaction between the supernova ejecta and a dense and extended H-rich circumstellar medium. The presence of such an extended and dense medium is difficult to reconcile with standard stellar evolution models, since the metallicity at the position of SN 2015da seems to be slightly subsolar. Interaction is likely the mechanism powering the light curve, as confirmed by the analysis of the pseudo bolometric light curve, which gives a total radiated energy greater than or similar to 10(51) erg. Modeling the light curve in the context of a supernova shock breakout through a dense circumstellar medium allowed us to infer the mass of the prexisting gas to be similar or equal to 8 M-circle dot, with an extreme mass-loss rate for the progenitor star similar or equal to 0.6 M-circle dot yr(-1), suggesting that most of the circumstellar gas was produced during multiple eruptive events. Near- and mid-infrared observations reveal a fluxexcess in these domains, similar to those observed in SN 2010jl and other interacting transients, likely due to preexisting radiatively heated dust surrounding the supernova. By modeling the infrared excess, we infer a mass greater than or similar to 0.4 x 10(-3) M-circle dot for the dustSpanish MICINN gran