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Search Results: 1 - 10 of 80137 matches for " SILVA WILSON DA "
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Metáforas da diferen?a: a quest?o do inteiramente outro a partir da teoria da realidade como constru??o
Gomes, Wilson da Silva;
Trans/Form/A??o , 1992, DOI: 10.1590/S0101-31731992000100008
Abstract: the idea of reality as construction maybe one of the most recurrent themes cutting across modern and contemporary thinking. objectivist realism has professed reality to be external and independent of subjectivity and maintained that experience was the capacity of being affected by things through the senses and of reproducing them as representative mental contents. as a reaction, modernity will establish: a) that consciousness is not merely receptive passivity but a configurant activity; b) that reality is not reflected by consciousness but, rather, is somehow constructed by it. our time rescues such heritage in a particularly fecund manner in the semiological discourse. intersubjectively constructed reality is a web of meanings and values which man institutes around himself in the world. reality sediments in systems of sign vehiculation (specially the language) and becomes fixed m codes. therefore the question: if reality, as construction, has the limits and scope of code, how does consciousness (and its records) behave concerning the non-codified, the non-constructed, in the absence of a code? this article deals with some views of this other of consciousness, presented as declensions of metaphor of absence.
O caráter organizacional e cultural da gest o escolar: breves anota es = The cultural and organizational character of school administration: brief notes
Wilson da Silva Santos
Acta Scientiarum : Human and Social Sciences , 2009,
Abstract: O objetivo deste artigo é analisar a gest o escolar como uma organiza o cultural que está impregnada de valores, rituais, práticas e rela es de poder. Este estudo está pautado numa perspectiva sociológica que valoriza os contextos específicos de a oeducativa e busca perceber a gest o escolar a partir dos sujeitos que a formam. As a es desses sujeitos est o emaranhadas de contradi es perceptíveis em orienta es que se adaptam a normas e a burocracias já “cimentadas”, mas, por outro lado, em comportamentos que v o de encontro a essa reprodu o normativa, criando práticas, valores, outras normas e tomada de decis es, o que torna a escola um espa o organizacional de resistência, estratégico, plural e aberto. O trabalho está fundamentado em teóricos que oferecem proposi es de análise direta ou indiretamente relacionada com a gest o e a cultura da escola, tais como: Nóvoa, Candido, Werle, Foucault e Castoriadis. Esse diálogo entre vários teóricos pode contribuir na feitura da análise sobre gest o escolar. The aim of this article is to analyze the school administration as a cultural organization that is imbue with values, rituals, practices and power relationships. This study is based on a sociological view that focuses on the specific contexts of educational action andsearches to realize the school management through the subjects which are part of this process. The actions of these subjects are full of contradictions; these contradictions can be noticed in orientations that are adjusted to “fossilized” rules and bureaucracies. On theother hand, these contradictions can be seen in behaviors that are opposed to these standard rules that create practices, values, other rules and decision-making that turn the school into an organizational place of resistance, strategic, plural and open. The work is based ontheoreticians that analyze directly or indirectly the school management and culture, such as: Nóvoa, Candido, Werle, Foucault and Castoriadis. This dialogue among several theoreticians can contribute to an analysis of the school management.
90 anos de Comunica o e Política
GOMES, Wilson da Silva
Contemporanea : Revista de Comunica??o e Cultura , 2011,
Levantamento de moscas-das-frutas e de seus parasitóides no município de Ferreira Gomes, Estado do Amapá
Silva, Wilson Rodrigues da;Silva, Ricardo Adaime da;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000100043
Abstract: this research was aimed at doing a survey on fruit flies and their parasitoids species in ferreira gomes, amapá state, brazil. exactly 38 samples of fruits of six vegetables species were collected and it totaled 43,7kg from march to july of 2005. it was possible to obtain 515 puparia that emerged 123 tephritidae adults and 102 parasitoids. moreover, five species of anastrepha were registered: a. fraterculus, a. obliqua, a. striata, a. antunesi and a. turpiniae. spondias mombin and psidium guajava were the only hosts of tephritidae species, they had indices of natural infestation of 0.51 e 0.24 puparia/fruit and 52.3 and 5.4 puparia kg-1, respectively. the dominant species were a. obliqua, in s. mombin, and a. striata, in p. guajava. four species of braconidae were registered: doryctobracon areolatus, utetes anastrephae, opius bellus and opius sp. of all these species, the first one was the most abundant.
Técnica hidrop?nica para triagem de genótipos de tomateiro quanto à eficiência de absor??o de fósforo
Silva, Ernani Clarete da;Maluf, Wilson Roberto;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000200022
Abstract: phosphorus (p) is the most limiting nutrient to plant growth and development in acidic soils of tropical and subtropical regions. the objective of this study was to establish a nutrient solution (hydroponics) technique for screening of tomato genotypes for efficiency of phosphorus absorption. an area of 160 m2 within a protective structure covered with 150 micron polyethylene film was used, with masonry-built channels 20 cm wide x 15 cm in height spaced 0.80 m apart. the experimental setup was a split plot design with factorial treatments and four replications. plots comprised two concentrations of p in nutrient solution (0.50 and 60 ppm), whereas subplots comprised two tomato genotypes with contrasting p absorption efficiencies [pi 121665 (efficient, crt/crt) and tom-598 (crt+/crt+)]. after this test, the two genotypes were again grown in a completely randomized experimental design with four replications, under the same structure, under concentration of 0.20 ppm p in nutrient solution. we evaluated the fresh mass of aboveground part, dry mass of aboveground part, fresh mass of root, dry mass of root and length, area and volume from the root. the hydroponic technique was effective to screen tomato genotypes for resistance or tolerance to phosphorus deficiency. the concentration of 0.50 ppm p in nutrient solution in nft hydroponic system was suitable for this purpose.
Surface characterization of alumina reinforced with niobium carbide obtained by polymer precursor
Acchar, Wilson;Silva, José Roberto Bezerra da;
Materials Research , 2006, DOI: 10.1590/S1516-14392006000300005
Abstract: active filler controlled pyrolysis of polymers (afcop) is a recent method for obtaining near-net shaped ceramic bodies. alumina based composites have been developed for use as cutting tools, so knowledge of the surface composition is extremely important because it is directly related to the hardness and wear resistance samples containing a fixed concentration of 60 wt. (%) of polysiloxane and a mixture of metallic niobium and alumina powder were homogenized, uniaxially warm pressed at 80 °c and subsequently pyrolyzed in flowing argon at 1200, 1400 and 1500 °c. analysis of the surface composition was carried out by x ray photoelectron spectroscopy, infrared spectroscopy, x ray diffraction and scanning electron microscopy. the results have indicated that the formation of the phases on the surface depends strongly on the niobium/carbon ratio in the raw materials.
Trends and strategies of ozone application in environmental problems
Silva, Leonardo M. da;Jardim, Wilson F.;
Química Nova , 2006, DOI: 10.1590/S0100-40422006000200023
Abstract: efforts presented by the scientific community in recent years towards the development of numerous green chemical processes and wastewater treatment technologies are presented and discussed. in the light of these approaches, environmentally friendly technologies, as well as the key role played by the well-known advanced oxidation processes, are discussed, giving special attention to the ones comprising ozone applications. fundamentals and applied aspects dealing with ozone technology and its application are also presented.
Juliana Domingues Lima,Wilson da Silva Moraes
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v36i3.2045
Abstract: Esse trabalho teve por objetivo testar métodos de controle de contamina o bacteriana no processo de multiplica o in vitro de bananeira (Musa AAA cv. Caipira), utilizando-se hipoclorito de sódio (NaOCl), antibiótico rifampicina e suas combina es. N o houve oxida o excessiva dos explantes após a imers o em NaOCl ou rifampicina. O melhor tratamento para explantes recém isolados foi imers o em NaOCl a 1% (v/v), durante dez minutos, seguido da imers o em 300 mg L-1 de rifampicina, durante vinte minutos. Após a contamina o, o melhor tratamento também foi a imers o em NaOCl a 1% (v/v), durante dez minutos, seguido da imers o em 300 mg L-1 de rifampicina, durante 24 horas no escuro. A maior eficiência no controle da contamina o foi obtida com a imers o prévia dos explantes em NaOCl a 5% (v/v), durante vinte minutos, e 300 mg L-1 de rifampicina, durante vinte minutos, com subseqüente cultivo em meio de cultura contendo 100 mg L-1 de rifampicina. Este tratamento, porém, provocou uma significativa redu o na multiplica o dos explantes. N o foram observadas anormalidades nos explantes ou plantulas cultivadas em meio de cultura contendo rifampicina. PALAVRAS-CHAVE: Cultura de tecidos; bananeira; bactérias. Bacterial contamination control methods were evaluated in in vitro multiplication of banana plants (Musa AAA cv. Caipira), using NaOCl, rifampicin antibiotic and their combinations. It was not observed excessive explant oxidation after the immersion in NaOCl or rifampicin. The best treatment for recently isolated explants was the immersion in 1% (v/v) NaOCl for ten minutes, followed by immersion in 300 mg L-1 rifampicin for twenty minutes. After contamination, the best treatment was the immersion in 1% NaOCl for ten minutes, followed by immersion in 300 mg L-1 rifampicin for twenty four hours in the dark. The highest contamination control efficiency was obtained with prior immersion of explants in 5% (v/v) NaOCl for twenty minutes, followed by immersion in 300 mg L-1 rifampicin for twenty minutes, and growing in culture medium containing 100 mg L-1 rifampicin. This treatment, however, reduced significantly the explant multiplication. No abnormalities were observed in the explants or plantlets growing in rifampicin-containing culture medium. KEY-WORDS: Tissue culture; banana plant; bacteria; NaOCl; rifampicin.
Juliana Domingues Lima,Wilson da Silva Moraes
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v36i1.2164
Abstract: Este trabalho teve por objetivo avaliar um protocolo para multiplica o in vitro para quatro genótipos de bananeira (Musa spp.) em escala comercial. Testes preliminares indicaram a utiliza o das concentra es ótimas de 5,0 mg L-1; 5,0 mg L-1; 4,5 mg L-1 e 4,0 mg L-1 de benzilaminopurina no meio de cultura MS, para a multiplica o dos genótipos Caipira, Thap maeo, PV03- 44 e FHIA-01, respectivamente. Em seguida, avaliou-se a taxa de multiplica o, o tamanho de brotos produzidos por explante, a taxa de contamina o por fungos e bactérias, a taxa de oxida o e a ocorrência de anormalidades durante as fases da multiplica o. A taxa de multiplica o e o tamanho de brotos por explante variou entre genótipos nos cinco subcultivos realizados. A taxa de contamina o mais elevada foi de origem bacteriana e mais freqüente na fase de estabelecimento in vitro, com tendência de redu o à medida que foram realizados os subcultivos. A maioria dos genótipos n o apresentou problemas de contamina o por microorganismos, exceto a cultivar Caipira que apresentou elevada taxa de contamina o por bactérias na fase de estabelecimento in vitro, o que representa uma limita o do protocolo para a multiplica o comercial desse genótipo. PALAVRAS-CHAVE: Musa spp.; micropropaga o; cultura de tecidos; benzilaminopurina. The purpose of this study was to evaluate a protocol for in vitro multiplication of four Musa spp. genotypes. Previous tests indicated the utilization of an ideal benzilaminopurin concentration of 5.0 mg L-1; 5.0 mg L-1; 4.5 mg L-1 e 4.0 mg L-1 in culture medium MS, during the multiplication of Caipira, Thap maeo, PV03-44 and FHIA-01 genotypes, respectively. After that, the multiplication rate, the size of shoots produced per explant, fungal and bacterial contamination rate, oxidation rate, and abnormality occurrence in the multiplication phases were evaluated. The multiplication rate and the size of shoots produced per explant varied among genotypes in the five subcultures studied. The highest contamination rate was caused by bacteria and was more frequent in the in vitro establishment, tending to be reduced with the number of subcultures. The most of the genotypes did not present problems of microorganism contamination, except for Caipira cultivar which presented high bacterial contamination rate during in vitro establishment. This problem is a limitation of the protocol to obtain micropropagated plantlets of this genotype. KEY-WORDS: Musa spp.; micropropagation; tissue culture; benzilaminopurin.
Potencial alelopático de Ipomoea fistulosa sobre a germina o de alface e tomate = Allelopathic potential of Ipomoea fistulosa on the germination of lettuce and tomato
Juliana Domingues Lima,Wilson da Silva Moraes
Acta Scientiarum : Agronomy , 2008,
Abstract: O objetivo do presente trabalho foi determinar o potencial alelopático de Ipomoea fistulosa na germina o e crescimento de plantulas. Em laboratório, sementes de alface e de tomate foram colocadas para germinar na presen a de água ou extratos de folhasde Ipomoea fistulosa, nas concentra es de 5, 10 e 15% (p/v). Em casa-de-vegeta o, as sementes foram colocadas para germinar em bandejas, contendo o substrato Plantmax e o substrato Plantmax + resíduo de folhas secas de Ipomoea fistulosa, na propor o 3% (p/p). Oextrato aquoso inibiu a germina o e elevou o tempo médio de germina o das sementes, além de reduzir o crescimento da radícula e hipocótilo em todas as concentra es utilizadas. Em casa-de-vegeta o, a altura da planta, o número de folhas, o acúmulo de massa seca das plantas também foram reduzidos na presen a dos resíduos de folhas no substrato. Os resultados sugerem a presen a de aleloquímicos em Ipomoea fistulosa e demonstram maior sensibilidade da alface a esses compostos, quando comparada ao tomate. The objective of the present research was to determine theallelopathic potential of Ipomoea fistulosa plants on germination and growth of seedlings. In laboratory, lettuce and tomato seeds were placed to germinate in the presence of water or Ipomoea fistulosa leaf extract, in the concentrations of 5, 10 e 15% (p/v). In greenhouse, seeds were placed to germinate in trays containing Plantmax substrate and Plantmax substrate + Ipomoea fistulosa dry leaf residue, at 3% (w/w). The aqueous extract inhibited germination,raised the mean germination time of the seeds and reduced the radicle and hypocotyl growth in all used concentrations. In greenhouse, the plant height, leaf number, and dry mass accumulation also were reduced in the presence of the leaf residue in the substrate.The results suggest the presence of allelochemicals in Ipomoea fistulosa and demonstrate the highest sensitivity of lettuce that tomato to these compounds.
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