bluuebunny/crossref_metadata_2025 huggingface dataset:
Óleos essenciais de uvaia (Eugenia pyriformis Cambess): avaliação das atividades microbiana e antioxidante
Authors: Stieven Ana Carla , Moreira Jane de Jesus da Silveira , Silva Cristina Ferraz
Published: February 2018

A geração de radicais livres, resultado dos processos metabólicos necessários para a produção de energia, causam um grande número de doenças, o que aumenta o interesse pelos compostos antioxidantes presentes em frutos e vegetais e que são responsáveis pela captura destes radicais. Além disso, a aplicação de óleos e extratos de frutos no controle microbiológico justifica o crescimento dos estudos científicos dessas matérias-primas. Nesse contexto o presente trabalho analisou o óleo essencial de diferentes partes do fruto de uvaia (Eugenia pyriformis) em relação à atividade microbiológica, fenóis totais e antioxidantes. O óleo essencial apresentou rendimento maior na casca (1,23 %), seguido pela fração casca com polpa, a fração com menor rendimento foi à semente, sendo quantificados a partir do fruto refrigerado. Os resultados obtidos na microbiologia frente as cepas de Scherichia coli ATCC25922, Staphylococcus aureus ATCC 6538, Pseudomonas aeruginosas ATCC 27 853 e Enterococcus faecalis ATCC99212 foram de ação bacteriostática em todas as cepas testadas, exceto a bactéria P. aeruginosas. Intervalo de inibição superior a 24 h foi observado para o óleo essencial da casca frente a bactéria P. aeruginosas.
Flavonoids extraction from Alpinia zerumbet (Pers.) Burtt et Smith leaves using different procedures
Authors: Victório Cristiane Pimentel , Lage Celso Luiz Salgueiro , Kuster Ricardo Machado
Published: February 2018

The current study aims to verify the best method for a rapid and efficient extraction of flavonoids from Alpinia zerumbet. Dried leaves were extracted using distillated water and ethanol 70% by extraction methods of shaking maceration, ultrasonic, microwave and stirring. By the application of TLC and reversed-phase HPLC techniques the rutin and kaempferol-3-O-glucuronide were detected. Ethanol 70% was more efficient for flavonoids extraction than water. No significant yielding variation was verified for ultrasonic, microwave and stirring methods using ethanol 70% (11 to 14%). Relative concentration of rutin and kaempferol-3-Oglucuronide, respectively, was higher by ultrasonic (1.5 and 5.62 mg g-1 dried leaves) and by microwave (1.0 and 6.64 mg g-1 dried leaves) methods using 70% ethanol. Rapid and simplified extraction proceeding optimize phytochemical work and acquisition of secondary metabolites.
Complexes of 4-chlorophenoxyacetates of Nd(III), Gd(III) and Ho(III)
Authors: Ferenc Wieslawa , Bernat Maria , Sarzyński Jan , Głuchowska Halina
Published: February 2018

The complexes of 4-chlorophenoxyacetates of Nd(III), Gd(III) and Ho(III) have been synthesized as polycrystalline hydrated solids, and characterized by  elemental analysis, spectroscopy, magnetic studies and also by X-ray diffraction and thermogravimetric measurements. The analysed complexes have the following colours: violet for Nd(III), white for Gd(III) and cream for Ho(III) compounds. The carboxylate groups bind as bidentate chelating (Ho) or bridging ligands (Nd, Gd). On heating to 1173K in air the complexes decompose in  several steps. At first, they dehydrate in one step to form anhydrous salts, that next decompose to the oxides of respective metals. The gaseous products of their thermal decomposition in nitrogen were also determined and the magnetic susceptibilites were measured over the temperature range of 76-303K and the magnetic moments were calculated. The results show that 4-chlorophenoxyacetates of Nd(III), Gd(III) and Ho(III) are high-spin complexes with weak ligand fields. The solubility value in water at 293K for analysed  4-chlorophenoxyacetates is in the order of 10-4mol/dm3.
Assessment of hydrochemical quality of ground water under some urban areas within Sana’a secretariat
Authors: Al- Ariqi Wadie , Ghaleb Abduljalil
Published: February 2018

Groundwater from nine wells of three different districts, located at Sana’a  secretariat was analyzed for hydrochemical quality assessment. Measurements of water quality parameters including pH, EC, CO32-, HCO3-,Cl-,NO3-,SO4 2-,Ca2+, Mg2+, Fe3+, K+, and Na+ were carried out . Classification of the groundwater samples according to Cl, SO4 2-, CO32- and HCO3-, hardness (H), total dissolved solids (TDS), base-exchange, and meteoric genesis was demonstrated. Suitability of ground water samples for irrigation and industrial uses according to sodium adsorption ration (SAR), ratio of dissolved sodium (RDS), residual sodium carbonate (RSC) and saturation index (SI) was also investigated. The results of this study showed that almost all ground water samples were of good quality that makes them suitable for drinking and  domestic uses. Results also indicated that even though some of the ground water samples were suitable for irrigation purposes, almost all of them were found not be good for industrial uses. Despite all drawbacks of the sewerage system built around Sana’a secretariat at the beginning of the first decade of the third millennium, the results of this study indicate that there is scope of significant improvement in Sana’a secretariat ground water quality.
The physico-chemical properties of 2-methoxyphenoxyacetates of Mn(II), Co(II), Ni(II) and Cu(II)
Authors: Ferenc Wieslawa , Bernat Maria , Sarzyński Jan
Published: February 2018

The complexes of 2-methoxyhenoxyacetates of Mn(II), Co(II), Ni(II) and  Cu(II)with the general formula: M(C9H9O4)3·4H2O, where M(II) = Mn, Co, Ni and Cu have been synthesized and characterized by elemental analysis, IR spectroscopy, magnetic and thermogravimetric studies and also X-ray diffraction measurements. The complexes have colours typical for M(II) ions (Mn(II) - a pale pink, Co(II) - pink, Ni(II) - green, and Cu(II) – blue). The carboxylate group binds as monodentate and bidentate ligands. On heating to 1273K in air the complexes decompose in the same way. At first, they dehydrate in one step to anhydrous salts, that next decompose to the oxides of respective metals with the intermediate formation of the oxycarbonates. Their solubility in water at 293K is of the order of 10-5 mol·dm-3. The magnetic moments of analysed complexes were determined in the range of 76-303K. The results reveal them to be high-spin complexes of weak ligand fields.
Bound state solutions of Schrödinger equation for a more general exponential screened coulomb potential via Nikiforov-Uvarov method
Authors: Ita Benedict Iserom , Ekuri Phenomena , Isaac Idongesit Okon , James Abosede Olubunmi
Published: February 2018

The arbitrary angular momentum solutions of the Schrödinger equation for a diatomic molecule with the general exponential screened coulomb potential of the form V(r) = (− a / r){1+ (1+ br )e−2br } has been presented. The energy eigenvalues and the corresponding eigenfunctions are calculated analytically by the use of Nikiforov-Uvarov (NU) method which is related to the solutions in terms of Jacobi polynomials. The bounded state eigenvalues are calculated numerically for the 1s state of N2 CO and NO.
Avaliação espectrofotométrica das formas Cr+3, CrO4-2 e Cr2O7-2
Authors: Costa Leonardo de Sá , Pereira Francisco Régis da Silva , De Farias Robson Fernandes , Pereira Francisco Claudece
Published: February 2018

Um estudo espectrofotométrico de especiação das formas Cr+3, CrO4-2 e Cr2O7-2 foi realizado em amplo intervalo de pH de 2,0 a 12,0 em solução tampão Britton-Robinson. Os espectros de absorção das regiões ultra-violeta e visível são bem caracterizados, apresentando bandas nas duas regiões espectrais. A relação de absorbância versus concentração, para cada espécie química, permitiu conhecer o coeficiente de absortividade molar das entidades químicas.
Análise de pesticidas organoclorados em óleos vegetais por cromatografia gasosa de alta resolução (HRGC)
Authors: Dias Eudécio Bonfim dos Santos , Vilela Eliane da Costa , Lanças Fernando Mauro
Published: February 2018

Os óleos vegetais comestíveis foram introduzidos na dieta humana em substituição as gorduras animais nas últimas décadas sendo amplamente consumidos em todo o mundo. O presente artigo descreve o desenvolvimento de uma metodologia para análise de aldrin, dieldrin, endrin e endosulfan em óleos vegetais por cromatografia gasosa de alta resolução (HRGC) utilizando-se extração em fase sólida (SPE). As médias de recuperação dos pesticidas estiveram entre 70 e 110%[1].
Development and validation of spectrophotometric method for the determination of DPP-4 inhibitor, sitagliptin, in its pharmaceutical preparations
Authors: Sekaran Chandra Bala , Rani Avula Prameela
Published: February 2018

A simple, sensitive and reproducible spectrophotometric method was developed for the determination of sitagliptin phosphate in bulk and in pharmaceutical formulations. The proposed method is based on condensation of the primary amino group of sitagliptin phosphate with acetyl acetone and formaldehyde producing a yellow colored product, which is measured spectrophotometrically at 430nm. The color was stable for about 1 hour. Beer’s law is obeyed over a concentration range of 5-25 μg/ml. The apparent molar absorptivity and Sandell sensitivity values are 1.067 x 104 Lmol-1cm-1 and 0.0471 μgcm-2 respectively. All the variables were studied to optimize the reaction conditions. No interference was observed in the presence of common pharmaceutical excipients. The validity of the method was tested by analyzing sitagliptin phosphate in its pharmaceutical preparations. Good recoveries were obtained. The developed method was successfully employed for the determination of sitagliptin phosphate in various pharmaceutical preparations.
Estimation of standard enthalpy of formation of alkanes in gaseous state by calculating size, structural and electronic parameters in the molecules
Authors: Verma Prem Singh , Gorsi Bhanwar Lal , Kalwania G. S. , Singh Lovel P.
Published: February 2018

A quantitative analysis is made on the correlation ship of thermodynamic property, i.e., standard enthalpy of formation (ΔH f0) with Kier’s molecular connectivity index(1Xv),vander waal’s volume (Vw) electrotopological state index (E) and refractotopological state index (R) in gaseous state of alkanes. The regression analysis reveals a significant linear correlation of standard enthalpy of formation (ΔH f0) with 1Xv, Vw, E and R. The equations obtained by regression analysis may be used to estimate standard enthalpy of formation (ΔH f0) of alkanes in gaseous state.
Spectrophotometric determination of nevirapine using tetrathiocyanatocobalt(II) ion as a reagent
Authors: Sreevidya Thekke V. , Narayana Badiadka
Published: February 2018

A simple and rapid spectrophotometric method for the determination of nevirapine is described. The method is based on the reaction of nevirapine with tetrathiocyanatocobalt(II) ion in buffer of pH 4 to form the corresponding complex. Beer’s law is obeyed in the range of 0.2 – 2.0 μg mL-1 for nevirapine. The optical parameters such as molar absorptivity, Sandell’s sensitivity, detection limit and quantitation limit were found to be 1.16× 104 Lmol-1cm-1, 2.09 X 10-3 μg cm-2, 0.073 μg mL-1 and 0.222 μg mL-1 respectively. The optimum reaction conditions and other analytical parameters were evaluated. The statistical evaluation of the method was examined by determining intra-day and inter-day precision. The proposed method has been successfully applied for the determination of nevirapine in pharmaceutical formulations.
Potentiometric quantification and speciation of oxygenated groups in humic substances using BEST7 software
Authors: Vaz Denise de Oliveira , Neves Fernandes Andreia , Szpoganicz Bruno , Sierra Maria Marta de Souza
Published: February 2018

In this study the BEST7 software was employed to quantify different classes of functional groups and to model the proton titration behavior of humic substances. To illustrate the process, the Suwannee River fulvic acid of the IHSS (International Humic Substances Society) was used. Five categories – two classes of phenolic groups (phenol and cathecol), two classes of carboxylic groups (benzoic and phtalic) and the combination between them (salicylic) - of oxygenated groups were considered as being responsible for the potentiometric behavior of the sample and were quantitatively determined. The most and the least abundant groups were cathecol (3.300 0.010 mmol g-1) and phenol (1.225 0.070 mmol g-1), respectively. The estimated equilibrium constants were also determined and were in good agreement with the literature values for phenol and cathecol groups and for benzoic, phtalic and salicylic acids. Distribution diagrams of the species were generated with the software SPE and SPEPLOT.
Síntese e caracterização de um novo complexo bimetálico de Pd(II) contendo o antibiótico oxitetraciclina
Authors: Guerra Wendell , Fontes Ana Paula Soares , Pereira-Maia Elene Cristina
Published: February 2018

Este artigo descreve a síntese e caracterização de um novo complexo binuclear de paládio (II) contendo o antibiótico oxitetraciclina. O complexo foi caracterizado pelas técnicas usuais de análise. Pela análise do espectro de infravermelho sugerimos que o íon paládio(II) coordena-se no anel A, mais especificamente nos oxigênios da amida e da hidroxila vizinha no anel A e aos oxigênios da carbonila em C11 e da hidroxila em C12.
Potentiometric and conductimetric studies of chemical equilibria for pyridoxine hydrochloride in aqueous solutions: simple experimental determination of pKa values and analytical applications to pharmaceutical analysis
Authors: Dos Santos Thiago de Almeida Drumond , Da Costa Diego Oliveira , Pita Samuel Silva da Rocha , Semaan Felipe Silva
Published: February 2018

The combination of two low-cost classical procedures based on titrimetric techniques is presented for the determination of pyridoxine hydrochloride in pharmaceuticals samples. Initially some experiments were carried out aiming to determine both pKa1 and pKa2 values, being those compared to values of literature and theoretical procedures. Commercial samples containing pyridoxine hydrochloride were electrochemically analysed by exploiting their acid-base and precipitation reactions. Potentiometric titrations accomplished the reaction between the ionizable hydrogens present in pyridoxine hydrochloride, being NaOH used as titrant; while the conductimetric method was based on the chemical precipitation between the chloride of pyridoxine hydrochloride molecule and Ag+ ions from de silver nitrate, changing the conductivity of the solution. Both methods were applied to the same commercial samples leading to concordant results when compared by statistical tests (95 and 98% confidence levels). Recoveries ranging from 99.0 to 108.1% were observed, showing no significant interference on the results.
Aspectos químicos e biológicos do gênero Lippia enfatizando Lippia gracilis Schauer
Authors: Gomes Silvana Vieira Floresta , Nogueira Paulo Cesar de Lima , Moraes Valéria Regina de Souza
Published: February 2018

“Aspectos químicos e biológicos do gênero Lippia enfatizando Lippia gracilis Schauer”. Esta revisão apresenta um estudo sobre os principais constituintes químicos e aspectos biológicos de espécies do gênero Lippia enfatizando a Lippia gracilis Schauer. O gênero Lippia Verbenaceae) possui aproximadamente 200 espécies de ervas, arbustos e pequenas árvores, cujos maiores centros de dispersão se encontram em países das Américas do Sul e Central, como também em territórios da África tropical. Inúmeras espécies de Lippia são usadas na medicina popular para o tratamento de resfriados, gripes, bronquites e tosse. As pesquisas referentes à composição química das espécies de Lippia evidenciam, principalmente, os constituintes voláteis. Entretanto, outras substâncias como alcalóides, taninos, flavonóides, iridóides e naftoquinonas também são citados. Sobre a espécie Lippia gracilis Schauer, existem vários estudos dos constituintes voláteis, apresentando como principais compostos o timol e carvacrol, que tem forte atividade antimicrobiana contra fungos e bactérias. No entanto, as pesquisas sobre os constituintes fixos são poucos, evidenciando a grande necessidade de trabalhos que enfoquem outras classes de compostos.
Transition Metal Complexes of Omeprazole An Anti-Ulcerative Drug
Authors: Malik Suman , Das Supriya , Jain Bharti
Published: February 2018

Omeprazole (OME) is a proton pump inhibitor (PPI). PPI’s have enabled to improve the treatment of various acidpeptic disorders. OME is a weak base and it can form several complexes with transition and non-transitions metal ions. In the present paper, we are describing series of trantion metal complexes of omeprazole i.e.,5-methoxy-2[(4methoxy-3,5dimethyl-2-pyridinyl)methylsulfinyl]–1H–benzimidazole with CuII, MnII, CoII, NiII, FeII, ZnII and HgII. These complexes were characterized by elemental analysis, molar conductance, IR, NMR, magnetic susceptibility, UV-visible spectral studies, ESR, SEM and X-ray diffraction. Based on the above studies, the ligand behaves as bidentate O, N donor and forms coordinate bonds through C=N and S=O groups .The complexes were found to non-electrolytic in nature on the basis of low values of molar conductance . Analytical data and stochiometry suggest ligand metal ratio of 2:1 for all the complexes. Electronic Spectra and Magnetic susceptibility measurements reveal octahedral geometry for Mn(II),Co(II), Ni(II),Fe(II) and Cu(II) complexes and tetrahedral for Hg(II) and Zn(II) complexes. Ligands and their metal complexes have been screened for their antibacterial and antifungal activities against bacteria Pseudomonas, Staphylococcus Aureus and fungi Aspergillus niger and A. flavous.
SELEÇÃO DE VARIÁVEIS PARA CATEGORIZAÇÃO DE AMOSTRAS QUÍMICAS
Authors: Anzanello M. J.
Published: February 2018

This paper presents a method to select the best variables to categorize chemical samples into two classes, say conforming or non-conforming. For that matter, PLS regression is combined with a data mining tool, the k-Nearest Neighbor classification technique, through an iterative variable selection process. The recommended subset of variables is chosen based on several criteria: sensitivity, specificity and percent of retained variables. When applied to two datasets related to wine analysis and one associated to QSAR, the proposed method significantly reduced the number of variables required for classification, while yielding superior categorization performance when compared to using all original variables.
Assessment of toxicity of cadmium and lead in tomato
Authors: Bertoli Alexandre Carvalho , Carvalho Ruy , Cannata Marcele Gabriel , Bastos Ana Rosa Ribeiro , Augusto Amanda dos Santos
Published: February 2018

Having the objective of evaluating the effect of application of cadmium and lead in tomato in the content, rate of growth and translocation in different parts of the plant, tomato plants were grown in nutrient solution of Clark and submitted to rising doses of Pb: 0; 0,25; 1,0; 5,0 and 10,0 mg L-1. Cadmium translocated 21,9% to more than lead to the aerial part showing Pb concentrated in the roots while in the fruits, the translocation of these metals reached 1,89% for Cd and 1,38% for Pb. In relation to the control treatment, the fruits production was reduced from the concentration 5,0 mg L-1 de Pb and 1,0 mg L-1 of Cd.
Influência das características físico-químicas do esgoto sanitário na desinfecção com ácido peracético
Authors: Cavallini Grasiele Soares , Campos Sandro Xavier , De Souza Jeanette Beber , Vidal Carlos Magno de Sousa
Published: February 2018

This paper aimed to study the use of peracetic acid (PAA) to disinfect the wastewater. In this perspective, the consume of PAA and its efficiency to deactivate total coliforms microorganisms and E.coli was investigated and under different conditions of total suspended solids (TSS) and pH. The tests of disinfection with PAA demonstrate that content of TSS over than 50 mg/L led to an increase of up to 50% in the consume of disinfectant to the microbial inactivation. The efficiency for inactivation of PAA related to E.coli was also damaged in PH conditions greater than 8. The time of contact had greater influence in the disinfection in dosages up to 5mg/L of PAA.
As causas do comportamento oscilatório de sistemas eletroquímicos devido a imobilização das substâncias diferentes através da polimerização eletroquímica de combinações heterocíclicas
Authors: Tkach Volodymyr , Nechyporuk Vasyl Vasylyovych
Published: February 2018

The behavior of immobilization systems of different substances through electropolymerization of heterocyclic combinations was investigated using linear stability theory and bifurcation analysis. Creating the mathematical model of this process and analyzing it we predict that the oscillations can occur if the interaction between the adsorbed particles and also the anodic oxidation of the strong oxidants (including also the autocatalytic chain growth) occur.
Descrição matemática do fenômeno oscilatório durante a síntese eletroquímica dos filmes dos oxi-hidroxi compostos de cobalto (III) e durante a síntese dos compósitos deles com os polímeros condutores
Authors: Tkach Volodymyr , Nechyporuk Vasyl Vasylyovych , Slipenyuk Oksana
Published: February 2018

The electrochemical behavior of the potentiostatic electrotransformation system from cobalt (II) salts to cobalt (III) oxyhydroxycompounds in the presence of fluoro ions (which promotes the dissolution of cobalt(III) oxyhydroxycompounds) on platinum, which acts as an oscillator, has been described mathematically. The corresponding mathematical model was analyzed using linear stability theory and bifurcation analysis. It is shown that the oscillations in this system occur because of the interaction between the film particles. For the case of electrosynthesis of polymeric composites of cobalt oxyhydroxy compounds with conductive polymers in the absence of fluoro ions, the factor most responsible for the oscillatory behavior is the polymerization factor.
Diagnóstico ambiental de metais no sedimento de córregos adjacentes a áreas de cultivo de banana (Musa spp.) no estado de São Paulo, Brasil
Authors: Corbi Juliano José , Kleine Priscila , Trivinho Strixino Susana , Dos Santos Ademir
Published: February 2018

O Brasil é o segundo maior produtor de bananas do mundo. O Estado de São Paulo é o maior produtor nacional, produzindo e colhendo 1,17 milhões de toneladas por ano, principalmente na região do Vale do Ribeira, onde se concentra 64,60% da área de produção da fruta do estado. Nesta área, 33.113 ha são destinados à produção de 810.000 mil toneladas de banana por ano. A utilização de fertilizantes durante o cultivo da banana, aliado ao desmatamento das matas ciliares, pode ser responsável por impactos nos recursos hídricos das áreas adjacentes. Este estudo apresentou como objetivo, avaliar o possível impacto do cultivo de banana no sedimento de 10 córregos analisando os metais Cd, Cu, Zn, Fe, Mn, Cr e Ni comumente utilizados em fertilizantes. Os resultados desse estudo apontam para maiores concentrações de metais em córregos com cultivo de banana quandocomparado aoscórregos florestados.No entanto, com exceção doNi, as concentrações dos metais detectados estão abaixo dos valores-guia de qualidade de sedimentos aquáticos (VGQSs),TEL (valores limiares de efeito) e PEL (valores prováveis de efeito)
O cálculo analítico e estimativo do volume molar do gás de van der Waals dióxido de carbono a 500 K e 100 atm, através do método de aproximação linear Newton-Raphson: um comentário sobre o uso de Scilab e Statistica em cálculos de físico-química e sobre a linguagem computacional
Authors: Filho Diogenes , De Melo Filho Antonio Alves , Duarte Ednalva
Published: February 2018

O uso de softwares nos cálculos químicos é uma realidade constante tanto em análises laboratoriais quanto em processos de simulação de transformações químicas. Em torno disto, esta publicação de revisão demonstra o quão apropriado deve ser o auxílio do uso dos programas Scilab e Statistica em Cálculos de natureza Química, mais especialmente, no caso do cálculo do volume molar. Em torno disto, discutiremos os resultados do emprego destes programas, com vistas sobre um exemplo prático, às ferramentas disponíveis para o cálculo de um polinômio que represente a função do volume molar de um gás em relação à pressão e temperatura termodinâmica.
Implementation of a spectrophotometer teaching and low cost: application in physics and chemistry laboratories fafism
Authors: Milagres Kátia Isabel , Rodrigues Amaral Camila , Santos Érica Marques da Silva , B. Marques Tarcísio , Gomes Guilherme de Oliveira
Published: February 2018

The photometry in the visual field has wide application in analytical laboratories and research physical, chemical, biochemical, pharmacological, etc. It is essential that students of physics and chemistry have knowledge about this quantitative technique. One obstacle to the widespread use of this technique is the cost of equipment and materials to be used. The objective of this work is the introduction of a photometer didactic, whose construction and technique with a low operating cost and the easy using and producing results, as a practical solution to put school improvement. The features highlighted in the work do the proposed photometer an economically viable alternative tool for chemical analysis in the laboratories of the Faculty for research and / or teaching.
Avaliação da influência da razão Ca/P nos valores de cristalinidade e crescimento de cristalitos durante a sinterização de pós de hidroxiapatita
Authors: Azevedo Adriano Galvão de Souza , Strecker Kurt
Published: February 2018

Amostras de hidroxiapatita (HAp) foram sintetizadas por meio da precipitação de soluções aquosas contendo os íons precursores. Ao final das sínteses, amostras com diferentes razões Ca/P foram obtidas e submetidas a sinterização em diferentes temperaturas. A análise por difração de Raios X comprovou que a estequiometria final dos pós de HAp influenciou nas respostas à sinterização. As amostras deficientes em cálcio (Ca/P=1,47) apresentaram além dos picos de difração do composto hidroxiapatita, fases de tricálcio fosfato - TCP (Ca3(PO4)2). As intensidades dos picos de TCP aumentaram com o aumento da temperatura devido a decomposição da HAp. Os difratogramas das amostras com cálcio em excesso (Ca/P=1,73) apresentaram picos de pequena intensidade de Ca(OH)2 e CaO. Os cristais do material Ca/P=1,47 tiveram uma diminuição do tamanho e cristalinidade com o aumento da temperatura e sua consequente decomposição, se diferenciando dos pós com Ca/P=1,73, que aumentaram seus tamanhos e a ordenação atômica devido ao processo de sinterização.
Estudo da produção enzimática de biodiesel a partir de óleo residual
Authors: Souza Vinícius Heidemann , Pacheco Sabrina Moro Villela , Cruz Júnior Américo , Furigo Júnior Agenor
Published: February 2018

Neste trabalho, a viabilidade da produção de biodiesel foi estudada utilizando como matéria-prima óleo de fritura residual. Os ensaios foram realizados com enzimas: Novozym 435, Lipozym TL IM e RM Lipozym IM em diferentes condições de temperatura, razão molar (etanol / óleo) percentagem do catalisador. Os resultados mostraram que a Novozym 435 foi mais eficiente para a produção de biodiesel a uma temperatura de 47,5 °C, numa proporção molar de 6:1 e a percentagem de enzima de 5,5%. A caracte rização do biodiesel mostra que ele apresentou a maioria dos parâmetros do regulamento da ANP para a sua utilização e comercialização.
Utilização do resíduo de erva-mate como material adsorvente do corante azul de metileno
Authors: Veit Márcia Teresinha , Bedin Sidmara , Gonçalves Gilberto da Cunha , Palácio Soraya Moreno , Fagundes-Klen Marcia Regina
Published: February 2018

Oresíduode erva-mate (IlexparaguariensisSt. Hil) foi utilizado como um potencialadsorvente docorante azul de metileno em soluções aquosas. No processo de adsorção foram avaliados três diferentes tamanhos de partícula e de velocidade de agitação. O equilíbrio cinético foi estabelecido em torno de 350 minutos. O modelo cinético de pseudo-segunda ordem foi o que melhor descreveu os dados cinéticos de adsorção do corante. Os dados de equilíbrio de adsorção do corante foram adequadamente representados pelo modelo de isoterma de Langmuir com umqmaxde 44,84 mg.g-1para a temperaturade 30°C.O resíduode erva-matedemonstrou ser um adsorventealternativo com potencial de remoção do corante
Desenvolvimento de metodologia em sistema em fluxo para determinação de Cd usando erva mate e chá preto como adsorvente e espectrometria de absorção atômica em chama
Authors: Mior Renata , Nunes Bianchin Joyce , Martendal Edmar , Carasek Eduardo
Published: February 2018

Neste estudo foram desenvolvidos novos métodos para determinação de cádmio em amostras biológicas certificadas usando mate (llex paraguariensis) e chá preto (Camellia sinensis, L.) como biosorbentes em um sistema de pré-concentração on-line acoplado à espectrometria de absorção atômica por chama. As variáveis de fluxo e químicas do sistema proposto foram otimizadas através de desenhos multivariados. As variáveis selecionadas foram o pH da amostra, concentração de tampão, taxa de fluxo da amostra e massa de biosorbentes. O limite de detecção para cádmio foi 0,98μg L-1 com uma precisão abaixo de 3,6% (35 μg L-1, n=6)para biosorvente de mate e 0,97 μg L-1 com uma precisão abaixo de 4,4% (35μg L-1, n=7) para o biosorvente de chá preto. Para ambos os biosorventes a curva analítica de 5 a 50 μg L-1, com um coeficiente de correlação de 0,9995. O método desenvolvido foi aplicado com sucesso em materiais de referência certificados (pigkidney e cabelo humano).
Estudo da fermentação submersa não aerada por Saccharomyces cerevisiae para determinação dos parâmetros de consumo de glicose e produção de glicerol e etanol
Authors: Marciano Martinez Maria Elisa , Carvalho dos Reis Patrícia , Alves Santos Douglas , Schmidell Netto Willibaldo
Published: February 2018

Um estudo da fermentação submersa não aerada por Saccharomyces cerevisiaefoi realizado avaliando a influência do pH nos coeficientes: (I) da equação de Pirt; e,(II) do modelo de Garden.Nos ensaios realizados, o aumento do pH retardou o consumo da glicose, e, o crescimento celular e a produção de etanol diminuíram com o aumento do pH de 4,5 para 8,0.Especificamente, em relação ao etanol, os elevados valores de coeficiente associado ao crescimento em relação aocoeficientenão associados ao crescimento indicam produção associada ao crescimento. Entretanto,para a produção máxima de glicerolhouve uma queda nos valores de coeficiente associado ao crescimentoe um aumento nos valores de coeficiente não associado ao crescimento. O consumo de glicose para manutenção celular foi significativo (0,2gglicose/(gcelula.h)) para pH 7,0 e 7,5, onde houve a maior produção de glicerol.Como conclusão foi possível observar a existência deuma relação entre o stress salino e osmótico no metabolismo da Saccharomyces cerevisiae através do aumento do consumo de glicose para manutenção celular, e a desassociação da produção do glicerol ao crescimento celular, indicando o acumulo de glicerol intra e extra celular.
Otimização da produção de biodiesel a partir de óleo de coco babaçu com aquecimento por microondas
Authors: Nascimento Ulisses Magalhães , Vasconcelos Antonio Carlos Sales , Azevedo Eduardo Bessa , Silva Fernando Carvalho
Published: February 2018

As reações sob aquecimento por microondas geralmente apresentam significativa redução no tempo de reação e elevados rendimentos. Portanto, o objetivo desse trabalho foi adaptar um forno de microondas doméstico de forma adequada e segura para realização de reações de transesterificação, e otimizar o processo de produção de biodiesel por microondas usando óleo de coco babaçu como matéria prima. Para este fim, foi usado um planejamento composto central no qual se variou o tempo de irradiação, concentração de KOH e razão óleo:metanol. Análises estatísticas foram feitas para avaliarem a significância do modelo usado. As condições experimentais ótimas foram: razão óleo:metanol, 8,59, concentração de KOH, 2,19%, tempo de irradiação, 70 segundos, dando rendimento de aproximadamente 100%.
A novel indicator reaction for the catalytic determination of V(V) at ppb levels by the kinetic spectrophotometric method
Authors: Ulusoy Halil İbrahim , Gürkan Ramazan
Published: February 2018

A novel sensitive and relatively selective kinetic method is presented for the determination of V(V), based on its catalytic effect on the oxidation reaction of Ponceau Xylydine by potassium bromate in presence of 5-sulfosalicylic acid (SSA) as activator. The reaction was monitored spectrophotometrically by measuring the decrease in absorbance of Ponceau Xylydine at 640 nm between 0.5 to 7 min (the fixed time method) in H3PO4 medium at 25oC. The effect of various parameters such as concentrations of H3PO4, SSA, bromate and Ponceau Xylydine, temperature and ionic strength on the rate of net reaction were studied. The method is free from most interferences, especially from large amounts of V(IV). The decrease in absorbance is proportional to the concentration of V(V) over the entire concentration range tested (1–15 ng mL−1) with a detection limit of 0.46 ng mL–1 (according to statistical 3Sblank/k criterion) and a coefficient of variation (CV) of 1.8% (for ten replicate measurement at 95% confidence level).
Thermomechanical treatment of a Fe-Mn-Al alloy
Authors: Gárlipp Waldir
Published: February 2018

Analysis of the hardnees and the metalographic struture, show in a FeMnAl alloy the existence of a γ fase and a β precipitate, activitate by Si during the casting processes. During the recovery and recrystalisation temperatures there are the formation of fringes, coarsed grains of γ fase and β precipitate . The thermomechanical treatments give to the material excellent properties of mechanical resistance and good ductility, without the β collaboration.
A versatilidade das argilas e as propriedades dos sítios superficiais de interação
Authors: Mangoni Ana Paula , Dias Patrícia Moura , Constantino Vera Leopoldo
Published: February 2018

Neste artigo,serão apresentados, de maneira simplificada e introdutória, os sítios ativos presentes nas superfícies das argilas que as tornam tão versáteis. Esses sítios são responsáveis pelas interações entre as argilas e espécies orgânicas ou inorgânicas, e pelas transformações químicas de substratos que ocorrem na superfície, permitindo entender tanto processos naturais que ocorrem no meio ambiente quanto aqueles efetuados em escala industrial. Propõe-se que o presente texto possa auxiliar a ilustrar, emsala de aula, conceitos fundamentais (tipos de reações químicas, interações eletrostáticas e outras) a partir de processos em superfícies sólidas. O estudo da correlação entre os sítios ativos das argilas e suas propriedades é um tema rico para ser explorado nas disciplinas de Química.
FORMAÇÃO DO DOCENTE PARA A GESTÃO UNIVERSITÁRIA: uma análise indutiva dos professores gestores da pós-graduação stricto sensu da UFRRJ
Authors: Rodrigues Ana Cristina De Albuquerque Lima , Villardi Beatriz Quiroz
Published: February 2018

Os professores gestores dos Programas de Pós-Graduação da Universidade Federal Rural do Rio de Janeiro são oriundos de áreas diversas à Administração. A ausência de formação específica orientada para o desempenho das funções da gestão levou ao objetivo desta pesquisa: descrever como o professor gestor de Programa de Pós-Graduação em Instituição Federal de Ensino Superior – IFES aprende e desenvolve suas competências gerenciais, mesmo sem capacitação específica para a gestão. Para alcançá-lo na pesquisa, adotou-se metodologia qualitativa indutiva de análise de dados, nos termos de Thomas, pela qual os resultados emergem dos dados pesquisados. Da análise resultaram formas, fontes e conteúdo da aprendizagem gerencial destes docentes, e o que desejam aprender, que permitiram identificar assuntos para capacitação na gestão. Neste artigo especificamente, que tem por objetivo evidenciar a ausência de formação do docente para a função de gestor, considerou-se a capacitação para o desenvolvimento de competências e consequente desempenho das funções no serviço público federal, assim como a transição do docente para função de gestor.  As recomendações finais envolvem processos de aprendizagem na prática da gestão, necessidade de reflexão para desenvolver competências considerando a relação entre contexto social, indivíduo e suas experiências vividas. The management professors of the Post-Graduation Programs of the Federal Rural University of Rio de Janeiro come from different areas to the Administration. The lack of specific training oriented to the performance of the management functions led to the objective of this research: To describe how the professor of postgraduate program in Federal Institution of Higher Education – IFES Learns and develops their managerial skills, even without specific training for management. To reach it in the research, it was adopted a qualitative inductive methodology of data analysis, according to Thomas, by which the results emerge from the data surveyed. From the analysis resulted the forms, sources and content of managerial learning of these teachers, and what they want to learn, which made it possible to identify subjects for training in management. In this article specifically, which aims to evidence the absence of teacher training for the role of manager, it was considered the qualification for the development of competences and consequent performance of the functions in the federal public service, as well as the transition from teacher to manager. The final recommendations involve learning processes in the management practice, need for reflection to develop competencies considering the relationship between social context, individual and their lived experiences.
A EDUCAÇÃO PRODUTIVA E A PRODUTIVIDADE DA EDUCAÇÃO: consequências do produtivismo acadêmico
Authors: Alves Renner Coelho Messias , Oliveira Victor Miranda de , Francisco Loreane Da Silva
Published: February 2018

Entende-se que na atual conjuntura o produtivismo acadêmico distancia a educação universitária do seu objeto original. Assim, crescentemente, o aumento das publicações de trabalhos acadêmicos não reflete um aumento da capacidade emancipatória dos atores envolvidos no contexto educacional, principalmente nos discentes de programas de pós-graduação. Diante disso, este artigo busca contrapor a educação produtiva e emancipatória ao produtivismo da educação implementado no ensino superior brasileiro. A relevância desta pesquisa consiste na proposta de reflexão sobre alterações de regras relacionadas ao campo acadêmico. Metodologicamente, a investigação ocorreu no fim do primeiro semestre de 2016. Além disso, utiliza-se neste artigo a revisão da literatura sobre o fenômeno aqui tratado, com consultas aos dados da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES). Também se faz um levantamento quantitativo da publicação de artigos na última década em três revistas brasileiras e, por fim, uma entrevista com um coordenador de um programa de mestrado em administração no Estado do Rio de Janeiro. Ao concluir, acredita-se que a essência da educação se perde frente ao atual sistema produtivista. Nowadays, the academic productivism dare the university education of its original spirit object. So, the raise in publishing academic work does not reflect an increase of emancipatory capacity of the actors involved in the educational context, even though in students of graduate programs. Thus, this article seeks to counter productive and emancipatory education to the education based on productivism, implemented in Brazilian higher education in the last years. The relevance of this research consists in a proposal of reflection on the change of rules related to the academic field. Methodologically, a survey was carried out at the end of the first half of 2016. In addition, a review of the literature on the phenomenon discussed here is used in this article, using data from the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES). Also made a quantitative survey of the publication of articles in the last decade in three Brazilian journals and, finally, an interview with a coordinator of a master's program in administration in the State of Rio de Janeiro. At the end, it is believed that the essence of emancipatory education is damaged against the current productivist system.
Vaginal Leiomyoma pada Anjing Betina 8 Tahun
Authors: Zaenab Siti , Alamsari Osye , Sherlin Kemala , Ramadhani Fathia
Published: February 2018

Vaginal leiomyoma adalah tumor benign yang berasal dari sel-sel otot halus (smooth muscle tumor) yang terdapat pada vagina. Anjing betina berusia 8 tahun datang ke My Vets Animal Clinic di Kemang Selatan dengan keluhan ada benjolan di antara anus dan vagina, dan anjing tidak bisa urinasi maupun defekasi dengan lancar. Tindakan bedah berupa episiotomi dan ovariohisterektomi dipilih untuk menangani vaginal leiomyoma tersebut. Tumor bersifat benign yang berada pada vulva-vagina memiliki respon yang bagus terhadap tindakan bedah berupa pengangkatan lokal (local excision) dan ovariohisterektomi. Vaginal leiomyoma pada anjing memiliki prognosa yang bagus jika berhasil didiagnosa dan dilakukan tindakan bedah berupa episiotomi dan ovariohisterektomi.
Profil hematologi anjing lokal di wilayah endemik rabies
Authors: Wijaya Agus , Tarigan Ronald , Santoso Koekoeh , Ridwan Yusuf , Sudarnika Etih , Ilyas Abdul Zahid , Lukman Denny Widaya , Wicaksono Ardilasunu , Nugraha Arifin Budiman , Afiff Usamah , Murtini Sri , Sukmawinata Edi , Parampasi Annisa Madyanti Geminastiti
Published: February 2018

Provinsi Jawa Barat merupakan satu dari 24 provinsi di Indonesia yang dilaporkan belum bebas Rabies. Usaha pembebasan wilayah Jawa Barat dari penyakit Rabies sangat strategis mengingat posisi Jawa Barat berada di antara daerah bebas Rabies. Jampang Tengah menjadi salah satu kecamatan di Sukabumi yang pada tahun 2016 dilaporkan telah terjadi 13 kasus gigitan Rabies. Penelitian ini menggunakan 81 sampel darah anjing lokal yang dikoleksi dari enam desa di kecamatan Jampang Tengah dan diperiksa dengan menggunakan alat Rayto® hematology analyzer. Parameter profil hematologi dikelompokkan berdasarkan perbedaan umur dan jenis kelamin anjing. Hasil pemeriksaan hematologi secara umum berdasarkan umur menunjukkan nilai rataan yang lebih besar pada anjing lokal umur ≥1 tahun dan konsentrasi leukosit menunjukkan nilai statistik yang signifikan berbeda (p<0.05). Berdasarkan jenis kelamin, nilai rataan parameter hematologi secara umum lebih tinggi pada anjing lokal betina dan adanya perbedaan signifikan (p<0.05) pada konsentrasi leukosit dan granulosit.
Suspect feline infectious peritonitis pada kucing
Authors: Widhyari Sus Derthi , Kusuma Bayu Firmala , Widodo Setyo , Esfandiari Anita , Wulansari Retno , Maylina Leni
Published: February 2018

Feline infectious peritonitis (FIP) adalah penyakit menular akibat infeksi corona virus dan dapat berakibat kematian. Diagnosa FIP dijumpai pada seekor kucing  dengan gejala anoreksia, lemas, perut membesar dan diare. Hasil pemeriksaan abdomen menunjukkan adanya undulasi positif diduga akibat penimbunan cairan di rongga abdomen. FIP tipe ini dijumpai adanya akumulasi cairan dalam rongga perut dan menyebabkan terjadinya pembesaran daerah abdomen dan disertai kesulitan bernafas. Berdasarkan pemeriksaan klinis dan laboratories, kucing di diagnosa mengalami suspect Feline Infectious Peritonitis (FIP) tipe basah. Perlu dilakukan pemeriksaan penunjang untuk lebih meneguhkan diagnosa, seperti uji serologis, radiografi, dan ultrasonografi.
Investigation of 4th Grade Primary School Students’ Level of Usage of Summarizing Strategy
Authors: SULAK Süleyman Erkam , ARSLAN Şenol
Published: February 2018

The
aim of this study is to research of 4th grade primary school
students’ level of usage of summarizing strategy. This research was carried out
in descriptive survey model. Survey model is a research model aiming to
describe a situation existing at that time or in the past as it is. The study
group of this study is consisted of 60 students studying in 4 grades of Bartın
Akçalı Primary School and Bartın Kozcağız Ahmetler Primary school in 2015-2016
academic year. Students were asked to summarize by giving informative and
narrative texts. In obtaining the data of the study, Summarizing Strategies Rating Scale and the Summarizing the problem
Inventory developed by Özçakmak
(2015) was used. In the results of study, the ability to use strategies of
summarizing on of the reading comprehension strategies and problems faced
during summarizing of 4th grade students were determined. It
was observed that ensures success students have 70,6% success in narrative
text summarization and 65,19 % success in informative text summarization. It
was determined that students are more successful in summarizing narrative texts
than informative texts and they have problems of not using correct reductions
and narrative mode.
Pengaruh pengembangan karir dan sistem insentif terhadap kinerja karyawan
Authors: Kudsi Muh Ridwan , Riadi Sukisno Slamet , AS Dirga Lestari
Published: February 2018

Penelitian ini bertujuan untuk menguji apakah pengembangan karir dan sistem insentif berpengaruh terhadap kinerja  karyawan PT Prudential Life Assurance Cabang Samarinda. Variabel bebas dalam penelitian ini adalah pengembangan karir dan sistem insentif sementara variable terikat adalah kinerja karyawan. Penelitian ini dilakukan pada karyawan PT Prudential Life Assurance Cabang Samarinda yang terdiri dari 65 responden. Jenis penelitian yang digunakan adalah penelitian kuantitatif. Metode pengumpulan data menggunakan kuesioner. Analisis data menggunakan regresi linear berganda. Hasil penelitian menunjukan bahwa pengembangan karir dan sistem insentif berpengaruh positif signifikan terhadap kinerja karyawan.
Permainan Bom Angka dalam Konsep Kelipatan Persekutuan Terkecil untuk Anak Sekolah Dasar
Authors: Adrelia Dyah Indah , Kurniawati Venny , Prahmana Rully Charitas Indra
Published: February 2018

The purpose of this research is that students are able to understand the basic concepts of Least Common Multiple (LCM) easy by using traditional games in Palembang, namely Bom Angka. The method used is design research with preliminary design, teaching experiment, and retrospective analysis stage, with the subjects were primary school students in the fourth grade. The results of this study indicate that the use of the traditional game in LCM motivated students to be more interested in learning mathematics, because students can learn and play at the same time. In addition, the pronunciation of numbers in sequence once uttered a bomb in every multiple of the numbers that have been agreed enables students to think quickly while helping students memorizing multiplication automatically, who were eventually able to instill the concept of LCM well.
Blended Learning, Trend Strategi Pembelajaran Masa Depan
Authors: Istiningsih Siti , Hasbullah Hasbullah
Published: February 2018

The objectives of this paper is to describe how the role and how to apply starategy blended learning in mathematics. blended learning strategy is mixing two or more strategies or learning methods to obtain the expected learning outcomes. Blended learning strategy in mathematics learning has three components which are mixed into one form of learning. The components consist of 1) online learning, 2) to-face learning, and 3) self-learning. Appropriate blended learning strategy is used in mathematics to study the future of the development of information and communication technology in Indonesia is very adequate.