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Search Results: 1 - 10 of 20974 matches for " Maristela Rosália Anastácio "
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Características germinativas de sementes de Ananas ananassoides (Baker) L. B. Sm. (Bromeliaceae) = Germination characteristics of seeds of Ananas ananassoides (Baker) L. B. Sm. (Bromeliaceae)
Maristela Rosália Anastácio,Denise Garcia de Santana
Acta Scientiarum : Biological Sciences , 2010,
Abstract: Ananas ananassoides é uma planta perene com hábito de crescimento herbáceo e que tem enorme potencial paisagístico porque apresenta flores e brácteas com colora o exuberante e folhas com margens espinescentes que est o distribuídas em roseta. O objetivo deste experimento foi o de avaliar as características germinativas e o efeito de tratamentos pré-germinativos nas sementes da espécie. Primeiro, em um delineamento inteiramente casualizado, foram investigados seis tratamentos em quatro repeti es de 25 sementes. Ostratamentos constaram da imers o em água destilada à temperatura ambiente (25 ± 1,5°C) durante 24, 48 e 72h, imers o em água quente a 90°C durante 2 min. e imers o em ácido sulfúrico p.a. durante 2 min. e com posterior lavagem em água corrente por 24h que foram comparados com um controle. Depois de quatro meses de armazenamento, sementesintactas (controle) foram comparadas com sementes imersas em água a 90°C por 2 min. Assim, a maior porcentagem de germina o (92%) foi obtida com sementes recém-colhidas e imersas em água a 90oC durante 2 min., mas o armazenamento por quatro meses melhorou a porcentagem de germina o (G ≥ 96,0%). Os tempos médios de germina o n o diferiram entre as sementes recém-colhidas (de 21,0 a 26,8 dias) e as armazenadas (entre 18,4 e 19,5 dias). A germina o das sementes recém-colhidas e armazenadas foi lenta e distribuída ao longo do tempo experimental. Ananas ananassoides is a perennial plant with ornamental potential because of flowers and bracts with exuberant colors and herbaceous development where the leaves have spiny margins that are distributed in rosettes. The objective of this experiment with six completely randomized treatments and four replicates of 25 seeds was to evaluate the effects of seed soaking into distilled water at environmental temperature (25 ± 1.5°C) for 24, 48, and 72h; seed soaking into water at 90°C for 2 minutes; seed soaking into sulfuric acid p.a. for 2 minutes followed by tap water washing for 24h, and the control. Thereafter, 4-month-old seeds were immersed into water at 90°C for 2 minutes and compared to the intact seeds (control). Initially, the highest percentage of germination (G=92%) was evaluated in newly collected seeds that were immersed in water at 90°C for 2 minutes. No increases in the percentage of seed germination were detected by seed soaking into water or sulfuric acid in comparison to the seeds that were immersed in water at 90°C for 2 minutes. However, the percentage of germination was higher than 96% when the seeds were stored for four months. No difference in the mean
Germina??o de sementes e emergência de plantulas de pau-santo: uma análise crítica do uso de correla??o
Santana, Denise Garcia De;Anastácio, Maristela Rosália;Lima, Julia Araújo De;Mattos, Marcela Bueno De;
Revista Brasileira de Sementes , 2010, DOI: 10.1590/S0101-31222010000300015
Abstract: kielmeyera coriacea is the most important cork supplying species of the brazilian savannah but it shows a high degree of individual polymorphism which can affect seed germination tests and seedling emergence. the objectives of this study were to correlate seed germination characteristics with seedling emergence and quantify the impact of individual variability in the correlation and significance tests. a randomized block design was used in the germination and emergence tests with seven treatments corresponding to the individuals and three plot replications with 32 seeds each. two distinct evaluation criteria were adopted: radicle protrusion in the germination test and a normal seedlings in the emergence test. k. coriacea individuals presented high germination and emergence capacities, with a high degree of uncertainty, low synchronization and spread in relation to average time, although in both tests the individuals showed a distinct classification with regards to these characteristics. the correlations between germination and emergence measurements with original data and with residuals were different, showing that the individual's intrinsic variability interferes with the measurement result. the significance associated with the correlation only indicated that the value found is not zero and, therefore, cannot be interpreted as being important in the association among the species characteristics.
Aplica??es da cultura de tecidos vegetais em fruteiras do Cerrado
Pinhal, Hernane Fernandes;Anastácio, Maristela Rosália;Carneiro, Pedro Augusto Porto;Silva, Valdiney José da;Morais, Tamara Prado de;Luz, José Magno Queiroz;
Ciência Rural , 2011, DOI: 10.1590/S0103-84782011005000089
Abstract: currently, it's been given a huge concern to the cerrado plants, focusing on fruit trees due to their characteristics and uses. despite being a fairly unexplored area, the number of studies on these native species has increased, especially those involving tissue culture techniques. that's because this biotechnological tool provides the propagation of species with germination difficulty, reduces problems of recalcitrant seeds, promotes large scale seedling production, complements germplasm banks and facilitates the exchange of genetic materials. therefore, this review summarizes the history and current situation of tissue culture techniques applied to brazilian cerrado fruit trees, providing support to further studies.
Inadvertent Postoperative Hypothermia at Post-Anesthesia Care Unit: Incidence, Predictors and Outcome  [PDF]
Clara Luís, Carlos Moreno, Acácio Silva, Rosália Páscoa, Fernando Abelha
Open Journal of Anesthesiology (OJAnes) , 2012, DOI: 10.4236/ojanes.2012.25047
Abstract: Background: Inadvertent postoperative hypothermia (IPH) is known to be associated with various adverse effects. The aim of this study was to evaluate the incidence, predictors and outcome of core inadvertent hypothermia on admission in the post-anesthesia care unit. Methods: Observational, prospective study in a Post-Anesthesia Care Unit. The study population consisted of adult patients after non-cardiac and non-neurologic surgery. Patients’ demographics, intraoperative and postoperative data were collected. Descriptive analysis of variables was used to summarize data and the Mann-Whitney U test, Fisher’s exact test or Chi-square test was used. Univariate and multivariate analyses were done with logistic binary regression with calculation of an Odds Ratio (OR) and its 95% Confidence Interval. Results: The incidence of IPH on admission was 32%. In univariate analysis: age, body mass index (BMI), high risk surgery, revised cardiac risk index (RCRI), type of anesthesia, use of forced-air warming, amount of intravenous crystalloids administrated, duration of anesthesia, duration of surgery and admission visual analogue scale (VAS) for pain > 3 were considered predictors of hypothermia. In multiple logistic regression analysis, age (OR 1.7, P = 0.045, for age > 65 years), RCRI (OR 3.18, P = 0.041, for RCRI > 2), duration of anesthesia (OR 1.52, P < 0.001) and admission VAS for pain (OR 2.05, P = 0.007) were considered independent predictors of IPH. Patients with IPH at PACU admission stay longer in the PACU. Conclusions: IPH was associated with a longer stay in the PACU. Age, comorbidities duration of anesthesia and pain at PACU admission were considered independent predictors for IPH.
Isolamento e sele??o de micro-organismos resistentes e capazes de volatilizar mercúrio
Giovanella, Patricia;Bento, Fátima;Cabral, Lucélia;Gianello, Clesio;Camargo, Flávio Anastácio Oliveira;
Química Nova , 2011, DOI: 10.1590/S0100-40422011000200012
Abstract: mercury (hg) occurs in the environment as a natural and anthropogenic element, and through the years the accumulation of mercury has affected the integrity of ecosystems and human health. this study presents a screening of microorganisms resistant to organic and inorganic mercury, the determination of the minimum inhibitory concentration of hg, the estimation of the mercury volatilization by selected microorganisms and the dynamics of volatilization. eight gram-negative bacteria resistant to high concentrations of mercury (60 to 210 mg l-1) were selected, and these isolates showed ability to volatilize the metal. the dynamics of the volatilization of the proteus mirabilis m50c demonstrated that in only 4 h of incubation it was possible to volatilize 72% of the mercury present in the culture. the results showed promising application for bioremediation strategies.
A Piece of a Puzzle of Haplotypes for the Indian Ocean Hawksbill Turtle  [PDF]
Rita Anastácio, Mário Jorge Pereira
Natural Resources (NR) , 2017, DOI: 10.4236/nr.2017.88034
Abstract: The Indian Ocean basin has much to reveal in what concerns marine turtles. Its regional management units (RMUs) are still lacking molecular data to define conservation strategies and priorities. Vamizi Island is one of the best known rookeries in the north of the Mozambique Channel. A mitochondrial DNA analysis revealed 14 haplotypes for the hawksbill turtle’s nesting and foraging in/near Vamizi, twelve of which were new in 2011. Though more studies inside the Channel are needed, Vamizi Island possibly contributes with hatchlings for other locations. More knowledge is important to define priorities for management units inside the Indian Ocean.
From the Challenges Imposed by Climate Change to the Preservation of Ecosystem Processes and Services  [PDF]
Rita Anastácio, Mário Jorge Pereira
Natural Resources (NR) , 2017, DOI: 10.4236/nr.2017.812048
Abstract:
Today, especially in countries that offer a satisfactory quality of life, it is easy to forget that we depend directly and indirectly on services provided by ecosystems such as quantity and quality of water, energy, food, health, and shelter. In less developed countries, the daily struggle for essential goods makes this dependency more real, despite the lack of knowledge, organization and/or financial resources to deal with the problems imposed on ecosystems by climate and anthropogenic changes. Protecting ecosystems by ensuring the services they provide has become highly dependent on our management capacity, our understanding of its functioning, and our capacity for persuasion. Demographic pressure and individualism compromise the survival of various species, including our own, and create pressures under governments and the stability of nations. The notion of facing a global challenge has awakened in the scientific community the need to focus on developing global strategies that change the mind-sets of decision makers, industry, governments and markets. Global knowledge networks and experts are being built to mitigate problems on a global scale. In this mini review, the authors make a brief visit to documents, intergovernmental initiatives, and platforms that have been built with the aim of contributing to promote a resolution for the global problems.
Epidemia de suicídio entre os Guaraní-Kaiwá: indagando suas causas e avan?ando a hipótese do recuo impossível
Morgado, Anastácio F.;
Cadernos de Saúde Pública , 1991, DOI: 10.1590/S0102-311X1991000400009
Abstract: the suicide of six young guaraní-kaiwá indians within the timespan of two weeks is enough to fulfill any criteria to define an epidemic. in a total population of 7,500 individuals, the available data account for 52 cases of suicide between 1987 and august 1991. the epidemic is more dramatic among the kaiwá subgroup among which 14 individuals died in 1990 and a number of suicides were reported for the first semester of 1991. for both sexes, most deaths were observed in the age group 12-20 years. the author advances the hypothesis of the impossible return according to which, under extreme pressure exerted by western society, they see no possibility of returning to their traditional way of living. under circumstances of extreme self-devaluation, suicide becomes the last alternative for the survival of their culture. suicide epidemics have been reported among amerindians in other countries suffering from the same kind of pressure. in brazil and also in other countries, other tribes have been urbanized and yet did not experience the tragedy which the kaiwá are going through because they had some kind of acceptable insertion in the national society.
Spy out to Protect: Sensing Devices for Wildlife Virtual Fencing  [PDF]
Rita Anastácio, Sérgio Cardoso, Mário Jorge Pereira
Open Journal of Ecology (OJE) , 2018, DOI: 10.4236/oje.2018.83013
Abstract: To avoid wildlife-human conflict several solutions are used, like electrical fences, the most expensive solution. Nowadays, technology enables alternative and cheaper approaches for conservation projects. A technological device was developed to detect elephants, moving on their habitat, and predict and react by avoiding confrontation with man. The devices were tested in field experiments, and proved to be efficient in capturing floor vibration, and air-sound signals. Collected data also enabled the estimation of the vibration-source by calculus (using triangulation), revealing the importance of the methodology for real-time location and tracking of high mass animals (e.g. elephants). Building up a mesh of devices, separated 25 m from each other, is estimated as possible to monitor and identify different animals (by discriminating patterns) in an area, like a virtual fencing system. Though the devices may be effective for animal behaviour research, or even animal communication analysis, or other Biology field, other applications outside Biology are possible for them, like monitoring of: rock-falling, micro seismic railway, infrastructures, and people movements.
Fatores culturais associados à doen?a da reclus?o do alto Xingu (Brasil Central)
Verani, Cibele;Morgado, Anastácio;
Cadernos de Saúde Pública , 1991, DOI: 10.1590/S0102-311X1991000400005
Abstract: this article presents an anthropological approach to the symbolic aspects of the disease, considering traditional representations about the puberty seclusion syndrome which affects adolescent indians from the upper xingu region (central brazil), in a comparative perspective with the clinical-epidemiological approach. the traditional nosological category and its etiological implications in indigenous medicine and culture are contrasted with the western medical category - a peripheral neuropathy, possibly of toxic origin - identified in some cases of the syndrome. an epidemiological analysis of the data collected from the traditional point of view shows relations with events of cultural origin, associated with social and political contexts and with the nature of cross-cultural relations. moreover, this culture-bound syndrome presents some methological issues for western medicine, particularly for biomedical and social-epidemiological approaches. finally, the authors make explicit some cultural assumptions characteristic of modern western society, underlying the procedures used by the scientific disciplines involved.
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