oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 2 )

2019 ( 12 )

2018 ( 12 )

2017 ( 9 )

Custom range...

Search Results: 1 - 10 of 6901 matches for " Marisa;Monteiro "
All listed articles are free for downloading (OA Articles)
Page 1 /6901
Display every page Item
The ‘Ferreira da Silva’ Chemistry Laboratory – a valuable asset in a university collection
Luis Bernardo,Marisa Monteiro
University Museums and Collections Journal , 2012,
Abstract: The relevant scientific and teaching activity in chemistry the Polytechnic Academy of Porto was involved in, at the turn of the 19th century, led to the decision of assigning a significant area of a building under construction for a new analytic chemistry laboratory. Several reasons are given why the Museum of Science has been proposing that this laboratory, a superb example of the University of Porto’s heritage, named after the prestigious chemist and Professor Ferreira da Silva, should be considered an item in itself in the museum’s overall collection, for its various valences, restored to its most valuable architecture and so preserved, to be appreciated also as a privileged exhibit scenario for the scientific instrument collection.
Ocorrência de Trichopria sp. (Hymenoptera: Diapriidae) atacando pupas de Chrysomya putoria (Wiedemann) Diptera: Calliphoridae) na granja
Monteiro, Marisa R.;Prado, Angelo P. do;
Anais da Sociedade Entomológica do Brasil , 2000, DOI: 10.1590/S0301-80592000000100020
Abstract: this work was carried out in a poultry house (granja capuavinha), monte mor, state of s?o paulo, from february 1991 to april 1992 with the purpose of studying the synanthropic flies and their parasitoids. the pupae were extrated from manure using a water-flotation method. berlese-tullgren's funnel was used to extract parasitoids and fly larvae. each pupa was kept in a small transparent glass vial for 35 days until the emergence of the fly or parasitoid. after this period, the pupae that did not yield adult flies or parasitoids were dissected. the following species of fly were collected: chrysomya putoria (wiedeman), muscina stabulans (fallén), musca domestica l., fannia pusio (stein). in addition several species of sepsidae were also collected. the following species of parasitoids that emerged from fly pupae were collected: spalangia gemina (boucek), s. cameroni (perkins), muscidifurax raptoroides kogan & legner, pachycrepoideus vindemiae (rondani), nasonia vitripennis (walker) and trichopria sp. (diapriidae). tachinaephagus zealandicus (ashmead) (encyrtidae) a larval pupal parasitoid also ocurred. this is the first report of trichopria sp., a gregarious parasitoid, attacking pupae of c. putoria. about 13% of parasitoids did not eclode successfuly from the parasitoid pupae which may indicate a recent association between trichopria sp. and c. putoria in brazil.
Sele??o e aloca??o de recursos em portfólio de projetos: estudo de caso no setor químico
Padovani, Marisa;Carvalho, Marly Monteiro de;Muscat, Antonio Rafael Namur;
Gest?o & Produ??o , 2010, DOI: 10.1590/S0104-530X2010000100013
Abstract: among dozens or hundreds of alternatives, choosing those which should make up the projects portfolio of an organization and which priority level is a complex multi-criteria decision matter. this work aims to apply a management model of projects portfolio, using the ahp (analytic hierarchy process) method and an integrated integer program. another purpose is to validate and evaluate the importance and use of the model to help the decision-making related to the selection, prioritization and balance of projects. thus, such a model was applied to select and prioritize the projects of a company in the chemical sector, chosen as the unit of analysis. the different scenarios obtained from the decision-making model proposed were compared to the real scenario of the company. since the author interacted in the company's decision-making not just as an observer, to carry out the study the research-action method was chosen, since it is the most suitable for the case. it could be noticed that the use of the model contributed first, to the strategic alignment of the projects, enabling the exchange of knowledge between the company representatives; secondly, it allows the simulation of strategic scenarios in real time, as well as verifying the impact of the projects portfolio; thirdly, it prioritizes the projects in a justifiable and structural manner through an established mathematical model; finally, it enables to allocate the resources based on priorities.
Práticas de avalia??o de professores de ciências físico-químicas do ensino básico
Correia, Marisa Sofia Monteiro;Freire, Ana Maria Martins Silva;
Ciência & Educa??o (Bauru) , 2010, DOI: 10.1590/S1516-73132010000100001
Abstract: during the last decade in portugal the curricula had undergone several changes, especially towards assessment. in this new curricula competences development is valued in different domains, such as knowledge (substantive, procedural and epistemological), communication, reasoning and attitudinal. in this context, we seek to characterise teachers' assessment practices. this study involves three beginning teachers of chemistry and physics. data was collected from semi-structured interviews, observations of lessons and documents supplied by the participants. all of the teachers demonstrate difficulties in assessment of attitudinal and procedural competences. only one of the participants elaborates observation with registration to assess these competences. the tests constitute the main assessment instrument in the teachers' lessons, what is coherent with a teaching and learning perspective that still remains traditional.
Níveis de resíduo industrial de fécula da mandioca na alimenta??o de suínos em crescimento e termina??o
Bertol, Teresinha Marisa;Lima, Gustavo Julio Mello Monteiro de;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000200013
Abstract: two experiments were conducted in order to evaluate the inclusion of cassava residue (rifm) in diets for growing and finishing pigs. in the first experiment, four levels (0, 6.67, 13.33 and 20%) of rifm in growing diets were studied. the inclusion of rifm in the diets caused a cubic effect on average daily gain (gpmd, p<0.01, r2 =0.80, y=804-54.06x+6.03x2-0.19x3) and final body weight (pmfc, p<0.01, r2 =0.79, y=60.47-2.87x+0.33x2-0.01x3) and a linear effect on average daily intake (crmd, p<0.04, r2 = 0.74, y=2090-136x). the quadratic effect was significant for slaughter body weight (pma, p<0.05, r2 = 0.69, y=98.88-1.28x+0.05x2) . in the second experiment, rifm was studied in four levels (0, 10, 20 and 30%) of inclusion in diets for finishing pigs. pig performance was not affected (p>0.10) by the inclusion of any level of rifm. it was concluded that the inclusion of rifm in diets for growing pigs, in levels like 6.67% or higher, decrease swine performance. in the finishing phase, the performance is not affected by the inclusion of any levels of rifm, up to 30%.
Interven??o educativa na perturba??o Gilles De La Tourette
Ramalho, Joaquim;Mateus, Filipa;Souto, Marisa;Monteiro, Marlene;
Revista Brasileira de Educa??o Especial , 2008, DOI: 10.1590/S1413-65382008000300002
Abstract: gilles de la tourette syndrome is a neuropsychological condition, caused by multiple disorders in brain neurotransmitters. it is characterized by compulsive phenomena that give rise to motor and vocal tics, resulting in social and emotional problems, especially in integration and adaptation in school. the present article aims to improve knowledge of this disorder, including related symptoms, as well as to develop educational intervention strategies for various educational agents, so as to foster more efficient school and social integration.
Ajuste e balanceamento do portfólio de projetos: o caso de uma empresa do setor químico Project portfolio adjustment and balance: a case study in the chemical sector
Marisa Padovani,Marly Monteiro de Carvalho,Antonio Rafael Namur Muscat
Produ??o , 2012,
Abstract: O objetivo deste trabalho é compreender a etapa de ajuste no contexto da gest o do portfólio de projetos, destacando sua rela o com os processos de categoriza o e balanceamento. A pesquisa realizada tem caráter qualitativo, sendo a abordagem adotada o estudo de caso longitudinal. A pesquisa foi desenvolvida em uma empresa do setor químico brasileiro. As evidências, de várias fontes, foram coletadas através de entrevistas, documentos e dados dos sistemas corporativos. Para a compreens o do portfólio de projetos da empresa foram coletados e analisados dados de mil projetos realizados entre 2001 e 2005. Os resultados indicam que maior aten o é dada à etapa de sele o, negligenciando a etapa de ajuste. A ado o de ferramentas de balanceamento permitiu evidenciar lacunas e fontes de desbalanceamento no portfólio de projetos, promovendo o debate entre os tomadores de decis o no que concerne ao viés introduzido pelos critérios adotados na etapa de sele o e levantando a necessidade de introdu o de uma sistemática de ajuste e balanceamento. Observou-se que sem uma adequada categoriza o dos projetos da empresa seria difícil promover a análise de balanceamento. This article aims to understand the adjustment stage of project portfolio management, highlighting its relationship with the processes of categorization and balancing. It is a qualitative research. The longitudinal case study approach was adopted. The research was carried out in a Brazilian chemical company. Several sources of evidence were collected through interviews, documents and data from the enterprise's systems. Data from 1,000 projects between 2001 and 2005 were collected and analyzed in order to understand the project portfolio. The results indicated that more attention is given to the selection stage, neglecting the adjustment stage. The adoption of balancing tools showed gaps and sources of imbalance in the project portfolio, promoting discussion among decision makers regarding the bias introduced by the criteria in the selection stage and raising the need to introduce systematic adjustment and balance. It was possible to observe that without a proper project categorization, it would be difficult to promote the balancing analysis.
Detec??o de Epstein-Barr vírus no carcinoma da nasofaringe: implica??es numa área de baixo risco
Breda, Eduardo;Catarino, Raquel Jorge Ferreira;Azevedo, Isabel;Lob?o, Marisa;Monteiro, Eurico;Medeiros, Rui;
Brazilian Journal of Otorhinolaryngology , 2010, DOI: 10.1590/S1808-86942010000300007
Abstract: several studies have been published concerning epstein-barr virus (ebv) infection and nasopharyngeal cancer (npc) development. the incidences of histological types are different according to endemic or non-endemic regions. latent ebv infection is found in almost all cases of npc in endemic regions, but normally absent in type i carcinomas, more common in non-endemic regions. aim: the purpose of this hospital-based study was to analyze the presence of ebv in nasopharyngeal tumor tissues and in peripheral blood of nasopharyngeal cancer patients and healthy individuals, in a low risk, non-endemic area. methods: ebv detection in samples of nasopharyngeal cancer patients and healthy individuals. results: this study indicates that the frequency of ebv positive cases in peripheral blood is higher in advanced tumor stages. conclusions: the incidence rates of npc have a distinct distribution. since the prevalence of this disease is low in occidental countries, little is known about the biology of these tumors in non-endemic areas. we observed statistically significant differences in ebv detection between the npc patient group and the control group. this study may help to understand the biological mechanisms of npc and the correlation of ebv infection with this disease, in a low risk, non-endemic region.
Migra??o de β-caprolactama de embalagens contendo poliamida 6 para simulante ácido acético 3% e valida??o do método analítico
Félix, Juliana Silva;Padula, Marisa;Manzoli, José Eduardo;Monteiro, Magali;
Ciência e Tecnologia de Alimentos , 2007, DOI: 10.1590/S0101-20612007000500005
Abstract: the aim of this work was to develop and validate an analytical method to determine ε-caprolactam in 3% acetic acid solution and to study its migration from polyamide 6 into food simulant. gas chromatography was used with ε-caprolactam as an analytical standard and 2-azacyclononanone as an internal standard. the linearity was obtained by the concentration range of 1.60 to 640.00 μg.ml-1, with a correlation coefficient of 0.9999. detection and quantification limits of the method were 0.24 ng and 1.60 ng, respectively. relative standard deviations obtained for method precision were less than 4.3%, while method accuracy showed recovery between 100 and 106%. the method was able to quantify ε-caprolactam in the simulant, showing a wide linearity, good precision and accuracy. for the migration assay, polyamide 6 films were placed in glass vials containing 10 ml of simulant, which were hermetically capped and exposed at 40 °c for 10 days (total immersion). the amount of ε-caprolactam that migrated from packaging into the simulant varied from 7.8 to 10.5 and 6.9 to 7.6 mg.kg -1, for films used as meat products and cheese packaging, respectively.
EMBALAGEM PL STICA CONTENDO POLIAMIDA 6 PARA PRODUTOS C RNEOS E QUEIJOS: MIGRA O DE CAPROLACTAMA E EFEITO DA IRRADIA O. UMA REVIS O
JULIANA SILVA F?‰LIX,JOS?? EDUARDO MANZOLI,MARISA PADULA,MAGALI MONTEIRO
Alimentos e Nutri??o , 2009,
Abstract: As poliamidas s £o muito usadas como embalagem de alimentos, principalmente devido resist ancia mec ¢nica, t rmica, qu -mica e gordura, s boas propriedades de barreira e por serem termoform veis. Filmes mono ou multicamadas contendo poliamida 6 s £o usados especialmente no acondicionamento de produtos c rneos e queijos. A caprolactama, mon ′mero da poliamida 6, assim como olig ′meros de baixa massa molecular, aditivos, compostos de degrada § £o, entre outros, tamb m podem estar presentes nas embalagens e t am potencial para migrar para o alimento em contato. O emprego da poliamida 6 como embalagem pl stica para contato com alimentos permitido no Brasil, na Europa e nos Estados Unidos, estando tamb m autorizado o uso para contato com alimentos pr -embalados que ser £o submetidos radia § £o ionizante. Apesar da baixa toxicidade, a presen §a de caprolactama em alimentos considerada indesej vel. A migra § £o da caprolactama de embalagens de poliamida para alimentos e simulante de alimentos tem sido relatada em alguns estudos. Os n -veis de caprolactama migrados variam dependendo da composi § £o da embalagem, do tempo e temperatura de contato, do tipo de simulante ou alimento, entre outros fatores. A migra § £o de caprolactama de embalagens de poliamida irradiadas est ainda relacionada dose de irradia § £o, mas de maneira geral, mostra tend ancia de redu § £o com o aumento da dose.
Page 1 /6901
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.