2,818 research outputs found

    Desenvolvimento inicial de feijão caupi inoculado com rizóbio em Latossolo de Cerrado

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    O feijão caupi é uma planta rústica, adaptada às diversas condições edafoclimáticas, sendo capaz de se associar com rizóbios nativos para obter parte do nitrogênio que necessita para completar o seu ciclo produtivo. Assim, o objetivo deste trabalho foi avaliar o efeito da inoculação de estirpes de rizóbio sobre o desenvolvimento inicial de plantas de feijão caupi, cultivado em Latossolo de Cerrado. Foi conduzido um experimento de vasos com solo, sob condições casa de vegetação e em delineamento inteiramente casualizado. O experimento constou de 16 tratamentos (12 estirpes de rizóbio, duas doses de nitrogênio (25 e 50 mg N dm-3), e uma testemunha absoluta), uma cultivar de feijão caupi e quatro repetições, totalizado 60 unidades experimentais. Foram analisadas as variáveis altura das plantas, número de nódulos, massa seca dos nódulos, massa seca da parte aérea e de raízes, índice de clorofila Falker e a eficiência relativa das estirpes. Os resultados obtidos demonstraram que as plantas de feijão caupi apresentaram respostas positivas à inoculação, refletindo em aumentos na massa seca, número de nódulos, na concentração de clorofila e com uma eficiência relativa das estirpes em relação aos tratamentos adubados com nitrogênio mineral acima de 90%. As estirpes de rizóbio, nas condições experimentais testadas, foram capazes de suprir a demanda de nitrogênio requerido pelas plantas de feijão caupi

    Avaliação do potencial biotecnológico de fungos endofíticos / Assessment of the biotechnological potential of endophytic fungi

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    Os fungos endofíticos são reconhecidos por sua imensa capacidade de produção de metabólitos que atuam como antimicrobianos, além de serem produtores de diversas enzimas extracelulares. Assim, o objetivo deste trabalho foi avaliar a atividade antibacteriana e enzimática de fungos endofíticos da coleção de microrganismos do IFMT - Campus Avançado de Lucas do Rio Verde. Ao todo foram testadas doze linhagens de fungos endofíticos, isolados da raiz de Cyperus rotundus (tiririca) e da folha de Zea mays (milho). Para o teste de atividade antibacteriana, utilizou-se o método de difusão em ágar e a determinação da concentração inibitória mínima (CIM) contra bactérias patogênicas gram-positivas: Staphylococcus aureus 25923, Listeria monocytogenes; e gram-negativas: Escherichia coli 25922, Salmonella choleraesuis 10708, Helicobacter pylori 43504, Shigella flexneri 12022. Utilizou-se as seguintes linhagens de fungos: Lasiosphaeriaceae sp R2B, Lasiosphaeriaceae sp R8E, Talaromyces pinophilus FEFM I, Ceriporia alachuana R9C, Fusarium acutatum T9E, F. acutatum R7C, F. acutatumR5A, Trichoderma sp. R4A, Fusarium oxysporum T2A, F. oxysporum T7C e Fusarium solani T1A e uma linhagem não identificada R9B. Para o  primeiro ensaio, discos miceliais (±7mm) foram retirados e situados em placas com meio Mueller-Hinton inoculado com  bactéria patogênica padronizada a 0,5 da escala de McFarland. As placas foram incubadas a 37°C por 24 h e a atividade foi determinada de acordo com a formação de halos de inibição. A determinação da CIM foi realizada a partir dos extratos fúngicos liofilizados nas concentrações de 0,16 a 20,00 mg/mL em microplacas de 96 poços, incubados a 37°C por 24 h, lidas em espectrofotômetro a 450 nm e reveladas com resazurina. A atividade enzimática foi determinada para as enzimas amilase e protease mediante a formação de halos de degradação de seus respectivos meios. Na avaliação da atividade antibacteriana pelo teste de difusão em ágar, dez isolados (FEFM I, R9C, T9E, R4A, R7C, R9B, T2A, R5A, T1A, T7C) apresentaram atividade contra Helicobacter pylori e oito (R2B, R9C, T9E, R7C, R9B, T2A, R5A, T1A) contra Shigella flexneri, com destaque para o fungo R9C que apresentou atividade contra quatro cepas de bactérias patogênicas utilizadas: Salmonella choleraesuis, Helicobacter pylori, Shigella flexneri e Listeria monocytogenes. Nenhuma concentração dos extratos liofilizados testados inibiram o crescimento das cepas patogênicas. Quanto à atividade enzimática, quatro isolados apresentaram atividade positiva e quatro fortemente positiva para amilase, sete isolados com atividade fortemente positiva e três positivos para atividade proteolítica. Entre os gêneros de fungos utilizados, Fusarium foi o que apresentou maior potencial biotecnológico, já que apresentou atividade antibacteriana e enzimática promissoras

    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

    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

    Les droits disciplinaires des fonctions publiques : « unification », « harmonisation » ou « distanciation ». A propos de la loi du 26 avril 2016 relative à la déontologie et aux droits et obligations des fonctionnaires

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    The production of tt‾ , W+bb‾ and W+cc‾ is studied in the forward region of proton–proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98±0.02 fb−1 . The W bosons are reconstructed in the decays W→ℓν , where ℓ denotes muon or electron, while the b and c quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions.The production of ttt\overline{t}, W+bbW+b\overline{b} and W+ccW+c\overline{c} is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 ±\pm 0.02 \mbox{fb}^{-1}. The WW bosons are reconstructed in the decays WνW\rightarrow\ell\nu, where \ell denotes muon or electron, while the bb and cc quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions

    Search for stop and higgsino production using diphoton Higgs boson decays

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    Results are presented of a search for a "natural" supersymmetry scenario with gauge mediated symmetry breaking. It is assumed that only the supersymmetric partners of the top-quark (stop) and the Higgs boson (higgsino) are accessible. Events are examined in which there are two photons forming a Higgs boson candidate, and at least two b-quark jets. In 19.7 inverse femtobarns of proton-proton collision data at sqrt(s) = 8 TeV, recorded in the CMS experiment, no evidence of a signal is found and lower limits at the 95% confidence level are set, excluding the stop mass below 360 to 410 GeV, depending on the higgsino mass

    Severe early onset preeclampsia: short and long term clinical, psychosocial and biochemical aspects

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    Preeclampsia is a pregnancy specific disorder commonly defined as de novo hypertension and proteinuria after 20 weeks gestational age. It occurs in approximately 3-5% of pregnancies and it is still a major cause of both foetal and maternal morbidity and mortality worldwide1. As extensive research has not yet elucidated the aetiology of preeclampsia, there are no rational preventive or therapeutic interventions available. The only rational treatment is delivery, which benefits the mother but is not in the interest of the foetus, if remote from term. Early onset preeclampsia (<32 weeks’ gestational age) occurs in less than 1% of pregnancies. It is, however often associated with maternal morbidity as the risk of progression to severe maternal disease is inversely related with gestational age at onset2. Resulting prematurity is therefore the main cause of neonatal mortality and morbidity in patients with severe preeclampsia3. Although the discussion is ongoing, perinatal survival is suggested to be increased in patients with preterm preeclampsia by expectant, non-interventional management. This temporising treatment option to lengthen pregnancy includes the use of antihypertensive medication to control hypertension, magnesium sulphate to prevent eclampsia and corticosteroids to enhance foetal lung maturity4. With optimal maternal haemodynamic status and reassuring foetal condition this results on average in an extension of 2 weeks. Prolongation of these pregnancies is a great challenge for clinicians to balance between potential maternal risks on one the eve hand and possible foetal benefits on the other. Clinical controversies regarding prolongation of preterm preeclamptic pregnancies still exist – also taking into account that preeclampsia is the leading cause of maternal mortality in the Netherlands5 - a debate which is even more pronounced in very preterm pregnancies with questionable foetal viability6-9. Do maternal risks of prolongation of these very early pregnancies outweigh the chances of neonatal survival? Counselling of women with very early onset preeclampsia not only comprises of knowledge of the outcome of those particular pregnancies, but also knowledge of outcomes of future pregnancies of these women is of major clinical importance. This thesis opens with a review of the literature on identifiable risk factors of preeclampsia

    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

    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
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