969 research outputs found

    Avaliação do rendimento do óleo essencial e produção de biomassa de Menta em função do manejo orgânico e horário de colheita no semiárido brasileiro / Assessment of essential oil yield and Minth biomass production according to organic management and harvest time in the brazilian semi-arid

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    O gênero Mentha compreende cerca de vinte e cinco espécies diferentes de hortelãs, originárias da Europa e pertencentes à família Labiatae. Destacam-se pelo uso culinário e de chás, medicinal sendo bastante conhecidas principalmente pelo seu sabor característico e aroma refrescante. Este trabalho teve como objetivo avaliar a interferência do manejo e horário de colheita sobre o rendimento e composição química do óleo essencial de Menta (Mentha arvensis L.). O experimento foi realizado no Instituto Federal de Educação, Ciência e Tecnologia do Sertão Pernambucano, Campus Petrolina Zona Rural (IFSertãoPE), localizado na cidade de Petrolina-PE. As mudas foram obtidas de matrizes produzidas em Horto Medicinal Orgânico. Foram analisados dois tratamentos, um com menta sob pleno sol e outro com plantas cultivadas à meia sombra.  Cada um conteve 8 blocos ocupados por 16 plantas. Foram consideradas as 4 plantas centrais do bloco, as quais foram colhidas em 5 horários diferentes, 6:00; 9:00; 12:00; 15:00 e 17:00 e em seguida pesadas. A extração do óleo essencial foi realizada no Laboratório de química do IFSertãoPE, em aparelho de Clevenger por meio de hidrodestilação. De acordo com a análise das bandas de confiança a 95% pode-se observar que não existe diferença no rendimento do óleo essencial entre as plantas cultivadas em pleno sol e à meia sombra, independentemente do horário em que a planta foi colhida. Com relação a produção de biomassa, o tratamento em pleno sol demonstrou maior acumulo apresentando assim, diferença estatística significativa

    Plantas daninhas e suas potencialidades medicinais / Weeds and their medicinal potentials

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    A planta daninha pode ser conceituada como “toda e qualquer planta que germine espontaneamente em áreas de interesse humano e que, de alguma forma interfere prejudicialmente no desenvolvimento na cultura, alguns termos são utilizados “plantas espontâneas”, “plantas invasoras” ou “plantas daninhas” têm sido indiferentemente empregadas na literatura agrícola e botânica brasileiras. Este trabalho teve como objetivo de realizar um levantamento das plantas daninhas em encontradas no Campus Petrolina Zona Rural, IFSertãoPE, visando conhecer a sua composição florística e identificar suas potencialidades fitoterápicas através da medicina popular. Foi realizado o levantamento de plantas espontâneas em toda área do Campus Petrolina Zona Rural-CPZR, IFSertãoPE, pelo método de caminhamento. Em seguida, foram realizadas as coletas de material botânico no campo, coletados, armazenados e transportados para o Laboratório de Biologia Vegetal CPZR. Posteriormente, seguindo as normas usuais empregadas na taxonomia vegetal, foram identificadas as espécies daninhas com potencialidades fitoterápicas com base na literatura especializada. A composição florística das plantas daninhas CPZR/ IFSertãoPE é representada por 23 famílias, 54 gêneros e 85 espécies. As espécies são ervas, arbustos, subarbustos ou lianas. Das 85 espécies de espécies daninhas encontradas CPZR/IFSertãoPE, 43 espécies apresentaram, representando 34% da amostra, segundo a literatura potencialidades medicinais. A Fabaceae apresentou o maior número de espécies medicinais, com 9 espécies e 7 gêneros, seguida a Asteraceae com 7 espécies e 5 gêneros.  As espécies daninhas destas famílias apresentam um grande potencial fitoterápico, além da adaptabilidade dessas famílias nas condições ambientais. Através dos resultados é possível afirmar que a composição florística das plantas daninhas do CPZR/IFSertãoPE possui uma rica potencialidade de uso medicinal, estas espécies poderão se transformar em culturas para fins econômico

    Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

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    Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

    Juxtaposing BTE and ATE – on the role of the European insurance industry in funding civil litigation

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    One of the ways in which legal services are financed, and indeed shaped, is through private insurance arrangement. Two contrasting types of legal expenses insurance contracts (LEI) seem to dominate in Europe: before the event (BTE) and after the event (ATE) legal expenses insurance. Notwithstanding institutional differences between different legal systems, BTE and ATE insurance arrangements may be instrumental if government policy is geared towards strengthening a market-oriented system of financing access to justice for individuals and business. At the same time, emphasizing the role of a private industry as a keeper of the gates to justice raises issues of accountability and transparency, not readily reconcilable with demands of competition. Moreover, multiple actors (clients, lawyers, courts, insurers) are involved, causing behavioural dynamics which are not easily predicted or influenced. Against this background, this paper looks into BTE and ATE arrangements by analysing the particularities of BTE and ATE arrangements currently available in some European jurisdictions and by painting a picture of their respective markets and legal contexts. This allows for some reflection on the performance of BTE and ATE providers as both financiers and keepers. Two issues emerge from the analysis that are worthy of some further reflection. Firstly, there is the problematic long-term sustainability of some ATE products. Secondly, the challenges faced by policymakers that would like to nudge consumers into voluntarily taking out BTE LEI

    Differential cross section measurements for the production of a W boson in association with jets in proton–proton collisions at √s = 7 TeV

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    Measurements are reported of differential cross sections for the production of a W boson, which decays into a muon and a neutrino, in association with jets, as a function of several variables, including the transverse momenta (pT) and pseudorapidities of the four leading jets, the scalar sum of jet transverse momenta (HT), and the difference in azimuthal angle between the directions of each jet and the muon. The data sample of pp collisions at a centre-of-mass energy of 7 TeV was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 5.0 fb[superscript −1]. The measured cross sections are compared to predictions from Monte Carlo generators, MadGraph + pythia and sherpa, and to next-to-leading-order calculations from BlackHat + sherpa. The differential cross sections are found to be in agreement with the predictions, apart from the pT distributions of the leading jets at high pT values, the distributions of the HT at high-HT and low jet multiplicity, and the distribution of the difference in azimuthal angle between the leading jet and the muon at low values.United States. Dept. of EnergyNational Science Foundation (U.S.)Alfred P. Sloan Foundatio

    Penilaian Kinerja Keuangan Koperasi di Kabupaten Pelalawan

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    This paper describe development and financial performance of cooperative in District Pelalawan among 2007 - 2008. Studies on primary and secondary cooperative in 12 sub-districts. Method in this stady use performance measuring of productivity, efficiency, growth, liquidity, and solvability of cooperative. Productivity of cooperative in Pelalawan was highly but efficiency still low. Profit and income were highly, even liquidity of cooperative very high, and solvability was good

    An embedding technique to determine ττ backgrounds in proton-proton collision data

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    An embedding technique is presented to estimate standard model tau tau backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed mu mu events and replaced with simulated tau leptons with the same kinematic properties. In this way, a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at root s = 13 TeV corresponding to an integrated luminosity of 41.5 fb(-1).Peer reviewe

    Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

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    A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV
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