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Search Results: 1 - 10 of 96502 matches for " Ana Maria; "
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Somatic Condition, Growth and Reproduction of Hake, Merluccius merluccius L., in the Portuguese Coast  [PDF]
Ana Maria Costa
Open Journal of Marine Science (OJMS) , 2013, DOI: 10.4236/ojms.2013.31002

Weight/length relationships, condition factor, gonadosomatic and hepatosomatic indices, conversion factor for gutted to total weight and spawning season of hake in the Portuguese Coast (36.92 to 42.22 degrees latitude N; 9.61 to 6.07 degrees longitude W) were investigated for the first time, aiming to fill the lack of information on the biology of hake of the Portuguese waters. Data were obtained from commercial samples collected between 2005 and 2010 and pooled by month. Sex ratio observed in fish below 40 cmwas close to 1:1; females were always dominant above50 cmlength. All the parameters were analysed by month and by sex and by combined sexes. The relationships obtained for combined sexes for the entire period concerning the growth in length and weight were: total length-total weight =0.0038L3.172, total length-gutted weight =0.0052L3.059. The relationship total weight-gutted weight was Wt = 15.8112 + 0.8480Wg and the conversion factor was of 1.1524. The growth rate is similar for both sexes but different when based on total weight or gutted weight. The analysis of the condition factor, gonadosomatic index, hepatosomatic index and the monthly distribution of the maturity stages seem to indicate that hake from thePortugueseCoasthas a long spawning season, with three spawning peaks in March, May and August but the start of the spawning season seems independent of the fish length.


Studies of Oxide Layers Grown at 260°C on A106 B Carbon Steel in Aqueous Medium with Ethanolamine or Morpholine  [PDF]
Ana Maria Olmedo, Roberto Bordoni
Materials Sciences and Applications (MSA) , 2015, DOI: 10.4236/msa.2015.69080
Abstract: The water chemistry of the secondary coolant in the majority of Nuclear Power Plants is controlled by AVT (All Volatile Treatment), wherein volatile amines are used to maintain the alkaline pH required for minimizing the corrosion of structural materials which one of them is Carbon Steel. In this treatment, ammonia, morpholine and ethanolamine are commonly used as conditioning reagents. In this context, experiments were carried out by exposing carbon steel A106 B samples in a simulated secondary coolant in order to study the nature of the oxide films. The tests were performed in a static autoclave at 260°C using two media: I) hydrazine + morpholine and II) hydrazine + ethanolamine during different exposure periods up to 1020 h. The oxide film characterization was mainly studied using Scanning Electron Microscopy and X-ray diffraction. A chemical descaling procedure was used to obtain the material weight loss (W) of samples, the adherent and released oxide. The XRD analyses, for all exposures studied, showed that magnetite was the corrosion product formed in the films grown in both media. The material weight loss, after descaling, could be fitted by a law of the type W = ktn, up to 1020 h of exposure tested, resulting in n = 0.42, k = 6.24 for films grown in medium I) and n = 0.39, k = 6.08 for films grown in medium II) respectively (W is in mg/dm2 and t in h). The higher corrosion product release measured in the medium with morpholine could be important in power plant operation.
The purpose of Family Medicine A propósito da Medicina de Família
Ana Maria Sant?Ana
Revista Brasileira de Medicina de Família e Comunidade , 2010, DOI: 10.5712/rbmfc1(1)6
Abstract: This paper makes a reflection about some practical issues concerning the work of family doctors, highlighting some conflicts to be discussed to contribute to the improvement of the quality of the specialty and as a consequence, the delivery of quality services to the communities. Este trabalho faz uma reflex o sobre aspectos práticos do trabalho do médico de família no Brasil, e ao apontar áreas de atrito se prop e a provocar uma discuss o que contribua para o aperfei oamento da especialidade e desta maneira, dos servi os prestados às comunidades.
Educational Policies and the Quality of Teaching: Perceptions of Portuguese Teachers  [PDF]
Ana Maria Costa e Silva, Rosalinda Herdeiro
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.511107
Abstract: The educational and curricular policies of the last two decades reflect attention to the quality of teaching by associating it with educational success, the improvement of student learning and the professional development of teachers. In this article we present some of the results of an investigation carried out with Portuguese teachers from the first cycle of basic education, who had, as their main objective, the understanding of the impact of educational and curricular policies on the development and identity of teachers, as well on the quality of teaching. We took as references various legal documents, especially the new Statute for a Teaching Career (STC) and the Evaluation of Teacher Performance (ETP) and other programs implemented by the Portuguese Ministry of Education. This longitudinal study was carried out over three years and it adopted a methodology of both a qualitative and quantitative nature, which permitted us to understand the perceptions of teachers of the first cycle of basic education using: 1) written and oral biographical narratives; 2) discussion groups formed specially for the purpose; and 3) replies from 249 questionnaires returned by teachers of this cycle. In this text we will report the results of analyzing the replies from the questionnaires and the statistical analysis made with the Chi-squared Test and the T-Test, which corroborate other studies carried out, particularly at an international level and which reveal that the teachers felt that the educational policies interfered negatively with their work, thus provoking: a weakening of their professional relationships, interaction with their peers and their collaborative work, as well as professional demotivation and disinvestment with a resulting negative impact on the quality of their teaching.
Application of Molecularly Imprinted Polymers for the Analysis of Pesticide Residues in Food—A Highly Selective and Innovative Approach  [PDF]
Raquel Garcia, Maria Jo?o Cabrita, Ana Maria Costa Freitas
American Journal of Analytical Chemistry (AJAC) , 2011, DOI: 10.4236/ajac.2011.228119
Abstract: The increasing application of pesticides for agricultural purposes involves serious risk to the environment and human health due to either exposure or through residues in food and drinking water. Since food safety is of mandatory importance there is a growing interest on the development of selective, simple, rapid, cost-effective and reliable analytical methodologies in order to ensure that pesticides residues should not be found at levels above the established maximum pesticide residue limits (MRLs). In recent years, a new methodology based on the development of molecularly imprinting polymers (MIPs) allows not only pre-concentration and cleaning of the sample but also selective extraction of the target analyte, which is crucial, particularly when the sample is complex and impurities can interfere with quantification. The scope of this review is to provide a general overview on MIPs field, with emphasis on MIP preparation and its use as sorbents for solid-phase extraction. This paper will be focused on the review of the current state of the art in the use of MIPs as selective materials in molecularly imprinted solid-phase extraction (MISPE) for the analysis of pesticide residues from food matrices. A review of preparation and application of MIPs in food matrices, will also be discussed.
Albert Hirschman na América Latina e sua trilogia sobre desenvolvimento econ?mico
Bianchi, Ana Maria;
Economia e Sociedade , 2007, DOI: 10.1590/S0104-06182007000200001
Abstract: this paper discusses albert hirschman?s trilogy on economic development, which was inspired by his extended stay in latin america and by his travels to several developing countries during the 1950s and the 1960s. after a review of each book making the trilogy there is a methodological section, where i discuss hirschman?s tendency to trespass disciplinary boundaries, his deep concern with practice and political relevance, and his empirically oriented method of research. the closing section raises some possibilities for further research.
Tempo de escola e qualidade na educa??o pública
Cavaliere, Ana Maria;
Educa??o & Sociedade , 2007, DOI: 10.1590/S0101-73302007000300018
Abstract: the present study is a reflection on the relationship between school hours and the quality of the educational work delivered at school. full-time school, which is increasingly adopted by the brazilian public school system, is analyzed from the stand point of the studies on school effectiveness and the cultural and historical conditions that define it. the different concepts supporting the full-time pedagogical and administrative propositions, which are translated into different institutional solutions, are also approached.
Desafios do "preconceito etário" no Brasil
Goldani, Ana Maria;
Educa??o & Sociedade , 2010, DOI: 10.1590/S0101-73302010000200007
Abstract: the material and symbolic resource flows and obligations between generations leave an indelible imprint on family members. these intergenerational exchanges have increased in recent years with growing human longevity and they thus have become important to current academic and policy agendas. concurrently, ageism and age discrimination have emerged as important subjects. the main goal of this article is to call attention to these issues and their relationship with the current policy debate on resource allocation by age groups. we argue that ageism and the practice of age discrimination in brazil should be viewed as part of the multiple forms of discrimination experienced by individuals. while noticing someone's age is not inherently offensive, acting on age-based stereotypes clearly works against the individual and often goes unchallenged by mainstream society. a central assumption in this paper is that the way we frame ageism and intergenerational relations significantly affects public policies.
Educa??o integral: uma nova identidade para a escola brasileira?
Cavaliere, Ana Maria Villela;
Educa??o & Sociedade , 2002, DOI: 10.1590/S0101-73302002008100013
Abstract: the brazilian public school system for basic education is going through both a loss of cultural identity and a pedagogical crisis. the chaotic expansion of its tasks as well as such recent policies as voucher-based programs, new evaluation systems, and the inclusion of topics related to health, ethics and culture into the academic curriculum seem to define a reality in which social integration acquires a central position in daily school life. this scenario leads us to review the concept of "integral education" in its pragmatist approach. the works of dewey and habermas provide us with sufficient philosophical foundations to create a concept of educational institution that may contribute to constructing a new identity for the basic education system, thereby responding to the democratic challenge facing the present brazilian society.
Entre o pioneirismo e o impasse: a reforma paulista de 1920
Cavaliere, Ana Maria;
Educa??o e Pesquisa , 2003, DOI: 10.1590/S1517-97022003000100003
Abstract: taking as a starting point the current concerns with the improvement of the quality of brazilian primary education schools, the text re-examines the reform of 1920 in s?o paulo state, which made explicit the political dilemma that would last for the whole of the 20th century between the expansion and the quality of school systems. the historical importance of that reform has been recognized in view of its pioneering attempts at innovating teaching methods and rationalizing management procedures. the conflict is pointed out here between the curriculum proposals of the reform and its proclaimed priority of achieving widespread children literacy in the state of s?o paulo when the first four years of primary education had been shortened by the same reform to a period of two years with two and a half hours daily attendance. the reform brings about in a technically justifiable way the "solution" of reducing daily attendance as a condition to increase places at school. such measures then became generalized practices in education systems throughout the country. the present work also investigates the contradictions evidenced in that reform between the first assimilations of the new school pedagogy and the tendency to simplification and impoverishment of the brazilian state school. in the present moment when the universalization of education in brazil seems to configure a new level of demand, requiring new political solutions to achieve high quality in education, the text focuses in retrospect the kind of political solution employed by the 1920 reform in s?o paulo, highlighting its unanticipated and undesirable results, in the hope of contributing to a better resolution of the challenges faced today.
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