Design de experimento no estudo comparativo de adsorção de corante sintético em quitosana e em carvão ativado comercial / Design of experiment in the comparative study of synthetic dye adsorption on chitosan and on commercial activated carbon

Neste trabalho experimental, foi realizado um estudo comparativo da adsorção de corante Remazol Brilliant Blue R (RB) em quitosana e carvão ativado como adsorventes, e avaliação da cinética de adsorção do corante RB em quitosana, segundo os modelos de pseudo-primeira ordem e pseudo-segunda ordem. Resultados mostraram que, dependendo das condições experimentais, a quitosana mostrou capacidade de remoção tão altas como o carvão ativado, chegando a >99% de remoção do corante da fase aquosa. Estudo dos gráficos de Pareto e de superfície de resposta mostraram que o pH e a dosagem de adsorvente foram os parâmetros que mais influenciaram no processo de adsorção com a quitosana. O modelo de pseudo-segunda ordem foi o mais adequado para descrever a cinética do processo adsortivo

Avaliação experimental da cinza da casca de arroz como suporte catalítico de níquel-rutênio para hidrogenação da sacarose / Experimental evaluation of rice husk ash as a nickel-ruthenium catalytic support for sucrose hydrogenation

O presente trabalho avaliou a eficiência da cinza de casca de arroz (CCA) como suporte catalítico de níquel-rutênio (Ni-10%-Ru-1%/CCA) aplicado ao processo de hidrogenação da sacarose com produção seletiva em manitol e sorbitol. Sob condições de processo de 5,0 g de catalisador foram misturados a 0,70 L de uma solução aquosa de 60 g.L-1 a 265 g.L-1 de sacarose, submetidos a  pressão de 700 psi em reator de leito de lama, com agitação mecânica de 500 rpm, funcionando semi-aberto para a fase gasosa (H2) e fechado para as fases líquida (solução de sacarose) e sólida (catalisador), nas temperaturas de 130°C, 140°C e 150°C. Nos resultados obtidos, destacou-se a temperatura de 150°C com a conversão de 100%  e seletividade de 72% para o sorbitol e 28% para o manitol para um tempo de reação de 3 horas e 60 g.L-1 de sacarose

Abordagem de odontoma composto e dente supranumerário: relato de caso

Introdução: Embora os odontomas e os dentes supranumerários sejam patologias distintas, ambas possuem processo patológico, malformativo ou hamartomatoso semelhantes. Por isso, não é incomum achados clínicos que envolvam estas duas patologias concomitantemente. Objetivo: Relatar um caso clínico de um odontoma composto associado a dente supranumerário, destacando pontos importantes a respeito do seu diagnóstico e tratamento das patologias. Relato de caso: Paciente sexo masculino, 25 anos, compareceu para atendimento odontológico, devido à necessidade de retratamento do elemento 21. A avaliação clínica e os exames de imagem apontaram a presença de duas patologias distintas em maxila, sugerindo a presença de um odontoma associado a um dente supranumerário. Foi realizado procedimento cirúrgico, sob anestesia local, para remoção cirúrgica das duas patologias. Conclusão: É importante priorizar a indicação e o tratamento que englobe a menor morbidade possível e que consiga tratar efetivamente ambas as patologias

Photography-based taxonomy is inadequate, unnecessary, and potentially harmful for biological sciences

The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009; Cianferoni & Bartolozzi 2016; Amorim et al. 2016). This question was again raised in a letter supported by 35 signatories published in the journal Nature (Pape et al. 2016) on 15 September 2016. On 25 September 2016, the following rebuttal (strictly limited to 300 words as per the editorial rules of Nature) was submitted to Nature, which on 18 October 2016 refused to publish it. As we think this problem is a very important one for zoological taxonomy, this text is published here exactly as submitted to Nature, followed by the list of the 493 taxonomists and collection-based researchers who signed it in the short time span from 20 September to 6 October 2016

Penilaian Kinerja Keuangan Koperasi di Kabupaten Pelalawan

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

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

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

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

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

Search for stop and higgsino production using diphoton Higgs boson decays

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