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Search Results: 1 - 10 of 4537 matches for " Iracy Lea;Medeiros "
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First record of molluscs naturally infected with Angiostrongylus cantonensis (Chen, 1935) (Nematoda: Metastrongylidae) in Brazil
Caldeira, Roberta Lima;Mendon?a, Cristiane LGF;Goveia, Christiane Oliveira;Lenzi, Henrique L;Graeff-Teixeira, Carlos;Lima, Walter S;Mota, Ester M;Pecora, Iracy Lea;Medeiros, Aline Maria Zigiotto de;Carvalho, Omar dos Santos;
Memórias do Instituto Oswaldo Cruz , 2007, DOI: 10.1590/S0074-02762007000700018
Abstract: seeking the identification of angiostrongylus cantonensis as a potential etiological agent of three clinical cases of eosinophilic meningitis, mollusc specimens were collected in the state of espírito santo, brazil. the snails were identified as sarasinula marginata (45 specimens), subulina octona (157), achatina fulica (45) and bradybaena similaris (23). larvae obtained were submitted to polymerase chain reaction and restriction fragment length polymorphism diagnosis. their genetic profile were corresponded to a. cantonensis. rattus norvegicus experimentally infected with third-stage larvae, developed menigoencephalitis, and parasites became sexually mature in the lungs. additionally, larvae obtained from a. fulica snails, from s?o vicente, state of s?o paulo, also showed genetic profiles of this nematode. this is the first record of brazilian molluscs infected with this nematode species.
Dez anos da LDB e a educa o profissional Ten years of the LDB and professional education
Iracy Silva Pican?o
Trabalho, Educa??o e Saúde , 2007, DOI: 10.1590/s1981-77462007000300012
Abstract:
Treatment Efficacy in Vertebrobasilar Transient Ischemic Attacks Presenting as Isolated Vertigo: A Retrospective Case Study  [PDF]
Lea Pollak
Journal of Behavioral and Brain Science (JBBS) , 2012, DOI: 10.4236/jbbs.2012.21010
Abstract: Background: Vertigo without other neurological symptoms is usually not supposed to be due to a vascular cause. How-ever, hypoperfusion of the anterior cerebellar artery can lead to ischemia of the vestibular labyrinth and/or vestibular nuclei in the pontomedullary region whereas hypoperfusion of the posterior cerebellar artery can cause ischemia of the vestibulocerebellum, all resulting in isolated vertigo. Methods: We retrospectively reviewed the clinical records of pa-tients with vertebrobasilar ischemic attacks referred to our outpatient dizziness clinic during the years 1999-2009. Pa-tients who presented only with vertigo (+/– vomiting and unsteadiness) were selected. Their clinical data, findings and treatment responses were recorded. Results: Amongst about one hundred patients with vertebrobasilar TIA we found 24 patients with monosymptomatic presentation. Their mean age was 67.3 years, fifteen were men. In most of the patients the vertigo attacsk were multiple and lasted from minutes to hours. All but four patients had at least one vascular risk factor at the time of presentation ,among them 13 had multiple vascular risk factors. Seven patients had evidence of chronic ischemic changes on brain CT or MRI .Aspirin (100 - 325 mg/die) was started in 15 patients. Three patients were started on clopidogrel (75 mg/die) because of aspirin intolerance and two patients on warfarin due to atrial fibrilla-tion. In two patients who were treated with aspirin prior to their vertigo attack, clopidogrel or dipyridamol were added. The mean time period from first attack to treatment initiation was 5.2 months. The mean follow up period was 27.4 months. In 18 patients the attacks have completely resolved after treatment initiation. Three patients had further vertigo attacks despite treatment. Two patients with vertigo episodes where a vascular etiology was not suspected, developed later an ischemic stroke in the vertebrobasilar territory (anterior cerebellar artery and vertebral artery infarct). Conclusions: The differential diagnosis of a vertigo attack presenting in a monosymptomatic form should include vertebrobasilar TIA, especially in individuals with vascular risk factors. In view of lack of a specific test for establishing the diagnosis antiplatelets should be administered on empirical grounds since early administration of therapy can abolish further attacks and prevent a vertebrobasilar stroke. Warfarin should be preserved for patients with cardiac conditions that warrant antiocoagulation for stroke prevention.
Predicting Job Satisfaction: Contributions of Individual Gratitude and Institutionalized Gratitude  [PDF]
Lea Waters
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.312A173
Abstract:

This study examined the role that employee perceptions of dispositional gratitude, state gratitude and institutionalized gratitude had upon job satisfaction. Employees (n = 171) completed measures of dispositional, state and institutionalized gratitude together with job satisfaction. Multiple Hierarchical Regression showed that state gratitude and institutional gratitude uniquely predict job satisfaction. The results have implications for the fields of positive organizational scholarship and positive organizational behavior and suggest that workplaces aiming to increase job satisfaction can do so through organizationally-based gratitude interventions and by institutionalizing gratitude into workplace culture.

The Relationship between Strength-Based Parenting with Children’s Stress Levels and Strength-Based Coping Approaches  [PDF]
Lea Waters
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.66067
Abstract: The current study adopted a positive psychology approach to examine the role of a positively oriented style of parenting—strength-based parenting (SBP)—on levels of stress in primary school aged children. Specifically, the study tested the degree to which SBP was directly and indirectly related to stress levels in children, partly through its influence on children’ coping responses. A community sample of Australian upper-primary school aged children (N= 103; Mage = 11.30; SD = 1.10; 57% female, 43% male) participated in a cross-sectional, mixed methods field study using self-report surveys and behavioral vignette. A series of multiple regression analyses found that SBP was significantly negatively related to stress levels and significantly positively related to strength-based coping in children. In addition, strength-based coping partially mediated the rela-tionship between SBP and stress levels in children, suggesting that one reason why SBP reduced stress in children was that it encouraged children to take strength-based coping approaches when faced with adversity. SBP thus increases the endogenous resources (i.e., personal strengths) that children can draw upon to address resources with demands that leads to stress. The discussion provides practical implications for SBP and suggestions for future research in this area.
The Relationship between Child Stress, Child Mindfulness and Parent Mindfulness  [PDF]
Lea Waters
Psychology (PSYCH) , 2016, DOI: 10.4236/psych.2016.71006
Abstract: The current study tested the degree to which mindfulness in parents was directly and indirectly related to stress levels in children. A community sample of 68 parent-child dyads completed self-report surveys (Children: Mage = 10.70, SD = 2.6; 52% female, 48% male; Parents: Mage = 42.70, SD = 9.6; 72% female, 28% male). Multiple regression analyses revealed that both parent mindfulness and child mindfulness were significantly and negatively related to child stress levels. However, mindfulness in children did not mediate the relationship between mindfulness in parents and stress in children. This study contributes to the emerging literature on the effects of mindful parenting on child wellbeing and provides practical suggestions for how parents and children can increase their mindfulness.
β-Amyloid promotes accumulation of lipid peroxides by inhibiting CD36-mediated clearance of oxidized lipoproteins
Vidya V Kunjathoor, Anita A Tseng, Lea A Medeiros, Tayeba Khan, Kathryn J Moore
Journal of Neuroinflammation , 2004, DOI: 10.1186/1742-2094-1-23
Abstract: The availability of mice genetically deficient in class A (SRAI & II) and class B (CD36) scavenger receptors has facilitated studies to discriminate their individual actions. Using primary microglia and macrophages, we assessed the impact of Aβ on: (a) cholesterol ester accumulation by GC-MS and neutral lipid staining, (b) binding, uptake and degradation of 125I-labeled oxidized lipoproteins via CD36, SR-A and CD36/SR-A-independent pathways, (c) expression of SR-A and CD36. In addition, using mice with targeted deletions in essential kinases in the CD36-signaling cascade, we investigated whether Aβ-CD36 signaling altered metabolism of oxidized lipoproteins.In primary microglia and macrophages, Aβ inhibited binding, uptake and degradation of oxidized low density lipoprotein (oxLDL) in a dose-dependent manner. While untreated cells accumulated abundant cholesterol ester in the presence of oxLDL, cells treated with Aβ were devoid of cholesterol ester. Pretreatment of cells with Aβ did not affect subsequent degradation of oxidized lipoproteins, indicating that lysosomal accumulation of Aβ did not disrupt this degradation pathway. Using mice with targeted deletions of the scavenger receptors, we demonstrated that Aβ inhibited oxidized lipoprotein binding and its subsequent degradation via CD36, but not SRA, and this was independent of Aβ-CD36-signaling. Furthermore, Aβ treatment decreased CD36, but not SRA, mRNA and protein, thereby reducing cell surface expression of this oxLDL receptor.Together, these data demonstrate that in the presence of β-amyloid, CD36-mediated clearance of oxidized lipoproteins is abrogated, which would promote the extracellular accumulation of these pro-inflammatory lipids and perpetuate lipid peroxidation.Hypercholesterolemia is an established risk factor for atherosclerosis and a number of recent epidemiological studies have suggested a link between increased circulating cholesterol levels and Alzheimer's disease (AD) [1]. Lipoproteins in the
Experimental and Theoretical Considerations of Electrolyte Conductivity in Glucose Alkaline Fuel Cell  [PDF]
Lea Mor, Zeev Rubin
Circuits and Systems (CS) , 2012, DOI: 10.4236/cs.2012.31015
Abstract: The paper focuses on the conductivity of the fuel cell electrolyte in a membraneless glucose-fueled alkaline fuel cell. The electrolyte conductivity is interpreted using simple physical models, considering either the empirical behavior of the solution’s viscosity, or the consideration of ions and molecules colliding in solutions. The conductivity is expressed as a function of KOH and glucose concentrations. The physical properties of the species (i.e. radii, thermal velocity) and the chemical equilibrium constant of the reaction that glucose undergoes in an alkaline solution can be estimate by comparing the experimental results with the theory.
On the diversity of mollusc intermediate hosts of Angiostrongylus costaricensis Morera & Cespedes, 1971 in southern Brazil
Teixeira, Carlos Graeff;Thiengo, Silvana C.;Thome, José Willibaldo;Medeiros, Aline Bueno;Camillo-Coura, Lea;Agostini, Aventino A.;
Memórias do Instituto Oswaldo Cruz , 1993, DOI: 10.1590/S0074-02761993000300020
Abstract: veronicellid slugs are considered the most important intermediate hosts of angiostrongylus costaricensis, an intra-arterial nematode of rodents. studies undertaken in three localities in southern brazil led to identification of molluscs other than veronicellid slugs as hosts of a. costaricensis: limax maximus, limax flavus and bradybaena similaris. these data indicate a low host specificity of larval stages of a. costaricensis, as it has been reported to other congeneric species.
Physical Modeling of the Enzymatic Glucose-Fuelled Fuel Cells  [PDF]
Vladimir (Zeev) Rubin, Lea Mor
Advances in Chemical Engineering and Science (ACES) , 2013, DOI: 10.4236/aces.2013.34028
Abstract: An enzymatic glucose biofuel cell uses glucose as fuel and enzymes as biocatalyst, to transform biochemical energy into electrical energy. An analytical modelling of an enzymatic biofuel cell should be used, while developing fuel cell, to estimate its various enzymatic parameters, to obtain the highest voltage feasibly. The analytical model was developed, and the open circuit voltage (OCV) calculated by the model for various parameters of the fuel cell is in agreement with the experimental results. The OCV is interpreted by using this model, based on theoretical consideration of ions transportation in the solution. The generation and consumptions of the ions near the electrodes were defined in the model by exponential approximations, with different depletion coefficients. The model reveals that increasing the rates of hydrogen ions generation and (or) consumption by enzyme or chemical reactions leads to a higher value of OCV. The model points that the OCV is saturated with a glucose concentration and increased logarithmically with a surface enzyme concentration. Hence, a low glucose concentration is sufficient to obtain adequate OCV, on the one hand, but it can be increased by increasing electrode surface porosity, on the other hand. This model can be expanded to include time and close circuit voltage.
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