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Search Results: 1 - 10 of 9689 matches for " Fernanda Ventorim Pacheco "
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Gas Exchange and Production of Photosynthetic Pigments of Piper aduncum L. Grown at Different Irradiances  [PDF]
Fernanda Ventorim Pacheco, Helbert Rezende de Oliveira Silveira, Amauri Alves Alvarenga, Ivan Caldeira Almeida Alvarenga, José Eduardo Brasil Pereira Pinto, Jean Marcel Sousa Lira
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412A3014
Abstract:

The species Piper aduncum is a plant with great economic potential, because the essential oil has antimicrobial activity and insecticides. Thus, as the light directly affects photosynthesis process, the present study evaluated the gas exchanges variables and photosynthetic pigments production of P. aduncum grown under different irradiances. Treatments consisted in environments with 100%, 70% and 50% of irradiance and environments with colored nets (red and blue). After 150 days of culture, photosynthetic activity (A), stomatal conductance (gs) transpiration rate (E), internal CO2 concentration (Ci), deficit vapor pressure (DVP), leaf temperature, concentration of internal/external CO2 (Ci/Ca), carboxylation efficiency (A/Ci) and efficiency water use (A/E) were evaluated. Pigments chlorophyll a, b, carotenoids, total and chlorophyll a

Optimization of the Protocol for the in Vitro Cultivation of Piper aduncum L.  [PDF]
Samia Torres Silva, Fernanda Ventorim Pacheco, Ivan Caldeira Almeida Alvarenga, José Eduardo Brasil Pereira Pinto, Suzan Kelly Vilela Bertolucci, Cibelly Pereira Ferreira
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.523363
Abstract:
Piper aduncum L. (Piperaceae) has great potential for economic exploration because of the proven use of its essential oil in the agriculture and in the human health. A technique that improves its propagation, as the tissue culture, becomes necessary. Some parameters must be determined for the successful cultivation in vitro. Thus, this study aimed to determine the salts concentration of MS medium, temperature, luminosity and light quality for in vitro culture of this species. The following treatments were conducted: 1/4MS, 1/2MS, MS and 2MS; 20, 25, 30 and 35; monochromatic blue, red and white lights and the combination of red and blue, using light emitting diodes (LEDs); luminosities of 17, 37, 48 and 73 μmol·m-2·s-1 obtained with cool white fluorescent lamp. After 35 days, the treatments were analyzed. To determine the salts concentration of MS, the variables were evaluated: number of shoots, leaves and roots, length and width of leaves, length and dry mass of root and shoots and percentage of death by necrosis. To the plantlets under different temperatures, length and dry mass of shoot and root, number of shoots, number, length and width of leaves and survival and rooting percentages were measured. The plantlets that were maintained under different luminosities were evaluated for length of shoot and root, dry mass of leaf and root. To evaluate the growth under the LEDs, the length and dry mass of shoot and root, number of shoots and roots, percentage of rooting and sprouting were assessed. The medium 1/4MS and the medium 1/2MS showed better responses for number and length of root, leaf width and shoot length. The temperature 25 provided the highest number of leaves, length of shoot and root, root dry mass and rooting percentage. The luminosity 73 μmol·m-2·s-1 provided higher values in length of root and dry mass of leaf and root. The red LED provided plantlets with greater growth. Thus, for the in vitro cultivation of Piper aduncum, 1/4MS, environment temperature of 25, light intensity of 73
Fator de resposta do alecrim-pimenta a diferentes laminas de irriga??o
Alvarenga, Ivan Caldeira Almeida;Lopes, Otávio Diniz;Pacheco, Fernanda Ventorim;Oliveira, Flávio Gon?alves;Martins, Ernane Ronie;
Pesquisa Agropecuária Tropical , 2012, DOI: 10.1590/S1983-40632012000400006
Abstract: evaluating the response of medicinal plants to irrigation is not very common, especially when they are native species with economic potential, such as the lippia sidoides. thus, this study aimed at evaluating the lippia sidoides response, by using the ky coefficient, and growth, under different irrigation depths. the coefficients were determined from the dry matter and essential oil yields. the experiment used a randomized blocks design, with treatments consisting of seven irrigation depths (0.5, 0.75, 1.0, 1.2, 1.4, 1.65 and 1.9 of the eto), with three replications. the eto was evaluated by using the penman-monteith method and the etr according to the soil water balance. growth was determined by measuring the stem diameter and height, at 35, 56, 77, 98 and 119 days after transplanting. at 120 days of cultivation, samples were collected to determine the dry matter and essential oil yields. the plant responded to water deficit with coefficients above 1.0, for both dry matter and essential oil yields. growth was positively affected by irrigation, reaching higher values for stem diameter and height when the highest irrigation depths were used.
Todos Pagamos o Pre o de uma Educa o Inadequada
Fernanda Tavares Pacheco
Meta : Avalia??o , 2010,
Abstract:
Educa o Corporativa e Desenvolvimento Humano: análise do programa de bolsas de estudos para professores e funcionários de uma institui o de ensino superior do Distrito Federal
Fernanda Tavares Pacheco
Meta : Avalia??o , 2012,
Abstract: A presente pesquisa teve por objetivo analisar a vis o que gestores e colaboradores têm em rela o ao Programa de Bolsas de Estudo para Professores e Funcionários (PBPF), de uma Institui o de Ensino Superior (IES) privada do Distrito Federal. A amostra da pesquisa constituiu-se por docentes e funcionários beneficiados pelo PBPF. Para tal utilizou-se o paradigma qualitativo e estudo de caso, a coleta de dados realizou-se por meio de análise documental, entrevistas semi-estruturadas e questionários. A revis o de literatura focou os processos da área de gest o de pessoas, educa o corporativa e políticas de benefícios. Constatou-se que gestores e colaboradores valorizam e percebem a importancia do PBPF, no entanto houve indica o de necessidade de esclarecimentos em rela o aos objetivos do programa. Identificou-se que parte dos colaboradores tem dúvidas relacionadas às diretrizes, formas de utiliza o e inser o no PBPF. A satisfa o por fazer parte da IES e do PBPF esteve na maioria dos relatos dos colaboradores. Entre as sugest es no sentido de aperfei oar o programa, gestores e colaboradores concordaram com a necessidade de discutir alguns critérios e de realizar acompanhamento sistematizado do PBPF. Sugeriu-se a elabora o de um manual para os usuários do programa.
O desencaixe moderno: o “tempo ecológico” de popula es tradicionais
Fernanda Pacheco da Silva Huguenin
Vértices , 2010,
Abstract: Embora o tempo na modernidade seja concebido de maneira linear, existem popula es tradicionais que associam ritmos naturais aos seus ritmos sociais, o que lhes permite viver em um “tempo ecológico”. A partir da concep o de desencaixe, o trabalho discute o desacordo gerado pelas portarias de regulamenta o do período de defeso de caranguejos no Sul e Sudeste, definidass pelo IBAMA, em rela o ao saber local das catadoras de Gargaú (RJ). O “tempo ecológico” das catadoras é, ent o, confrontado com as portarias, de modo a refletir o desencaixe que promovem determinadas institui es modernas quando n o atentam para contextos tradicionais The modern disembedding: the ‘ecological time’ of traditional populations Although time in modernity is conceived in a linear way, there are traditional populations who associate natural rhythms to their social rhythms. This allows them to live in an ‘ecological time’. Based on the concept of disembedding, this paper discusses the disagreement generated by decrees issued by IBAMA (Brazilian Environmental Agency) regulating the fenced season of crab fishing in the South and Southeast, in relation to the local knowledge of the catadoras (female crab collectors) in Gargaú, RJ. The ‘ecological time’ of the catadoras is, then confronted with the decrees in order to demonstrate the disembedding pro moted by some modern institutions when they overlook traditional contexts.
“O que você faz numa festa de preto?”: ensaio sobre os dilemas raciais brasileiros
Fernanda Pacheco da Silva Huguenin
Vértices , 2010,
Abstract: A partir de uma experiência pessoal quando a minha classifica o étnica esteve em jogo, analiso a interpreta o do dilema racial brasileiro nas obras de quatro autores: Gilberto Freyre, Florestan Fernandes, Roberto da Matta e Fábio Wanderley Reis. Discuto comparadamente conceitos presentes nas obras, como democracia racial e a integra o do negro na sociedade de classes, buscando as concordancias e discordancias que canonizaram as interpreta es de Freyre e Florestan. Argumento que todas as respostas ao racismo por eles formuladas tocam a realidade, mas est o longe de ser veredictos do problema. Penso, a partir do exercício de reflexividade trazido pela experiência, na minha própria classifica o étnica. What do you do at a black party?”: an essay on Brazilian racial dilemmas From a personal experience, in which my ethnic classification was in discussion, I analyze the interpretation of Brazilian racial dilemma in the works of four authors: Gilberto Freyre, Florestan Fernandes, Roberto da Matta and Fabio Wanderley Reis. I discuss, in a comparative way, concepts in those works, such as racial democracy and the integration of black people in the class society, looking for the agreements and disagreements that canonized Freyre’s and Florestan’s interpretations. I claim that all responses to racism made by them touch upon reality, but are far from being verdicts to the problem. My reasoning is based on a process of reflexivity (a concept in Sociology) brought by my own experience and ethnic classification
The river, the man, the drama O rio, o homem, o drama
Fernanda Pacheco da Silva Huguenin
Boletim do Observatório Ambiental Alberto Ribeiro Lamego , 2011,
Abstract: The South Paraíba River Basin is historically marked by disasters generated from waste materials carried off by industrial sewers. The discontinuity of water supply to the population and the killing of fish are recurring events since the intensification of urban and industrial development. This essay analyzes, from an ethnographical register, the consequences of the Cataguazes Paper Industry’s disaster in 2003, under the point of view of fishermen in Gargaú, a small village located in the mouth of the river. The work discusses, within the field of anthropology, the risk liability as well as the social and environmental inequality of the traditional northern coastline population of the Rio de Janeiro State. A bacia do Paraíba do Sul é historicamente marcada por desastres decorrentes de despejos de efluentes industriais. Interrup o do abastecimento de água e mortandades de peixe s o fen menos recorrentes desde que o processo de industrializa o e urbaniza o se intensificou na regi o. O trabalho analisa, a partir do registro etnográfico, as consequências do desastre da Cataguazes de Papel, ocorrido em 2003, do ponto de vista dos pescadores de Gargaú, assentamento pesqueiro localizado na foz do rio. O artigo discute, dentro do campo da Antropologia, a vulnerabilidade ao risco e à desigualdade socioambiental de uma popula o de tradi es do litoral fluminense.
Efeito dos ácidos hexenur?nicos e da lignina no desempenho da ozonólize, em diferentes pHs da rea??o
Ventorim, Gustavo;Colodette, Jorge Luiz;
Química Nova , 2006, DOI: 10.1590/S0100-40422006000500007
Abstract: the effect of ph on the performance of the ozonolysis stage in pulp production was evaluated for conventional and acid treated brown and oxygen delignified eucalyptus kraft pulps. the objective was to determine separately the effects of lignin and hexenuronic acid on the performance of the ozonolysis stage. the reaction of ozone with hexenuronic acid is less sensitive to ph than the reaction of ozone with lignin. the efficiency and the selectivity of the reaction of ozone with pulp decreases after removal of hexenuronic acids. increasing up to 7.0 the ph during the ozonolysis is viable in the sequence z/d(eop)d, resulting in savings of h2so4 (8,5 kg/tsa) and naoh (5 kg/tsa), but is not recommended in the sequence z/ed(po).
Efeito dos ácidos hexenur nicos e da lignina no desempenho da ozonólize, em diferentes pHs da rea o
Ventorim Gustavo,Colodette Jorge Luiz
Química Nova , 2006,
Abstract: The effect of pH on the performance of the ozonolysis stage in pulp production was evaluated for conventional and acid treated brown and oxygen delignified eucalyptus kraft pulps. The objective was to determine separately the effects of lignin and hexenuronic acid on the performance of the ozonolysis stage. The reaction of ozone with hexenuronic acid is less sensitive to pH than the reaction of ozone with lignin. The efficiency and the selectivity of the reaction of ozone with pulp decreases after removal of hexenuronic acids. Increasing up to 7.0 the pH during the ozonolysis is viable in the sequence Z/D(EOP)D, resulting in savings of H2SO4 (8,5 kg/tsa) and NaOH (5 kg/tsa), but is not recommended in the sequence Z/ED(PO).
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