Suchergebnisse

Antes de iniciarmos esta exposição dando um balanço objetivo nas atividades .e iniciativas no terreno da energia atômica no Brasil, parece-nos útil estabelecer bem claramente certas distinções, necessárias, em vista da confusão que se tem feito com freqüência entre os domínios da Energia Atômica e da Física Nuclear.

Hypoxia-Induced Intermitochondrial Junctions in the Rabbit Carotid-Body: An Ultrastructural and Experimental Study -- Ultrastructural Studies of the Cat Carotid Body Perfused for Short Periods with Physiological Saline Solutions -- Morphological and Biochemical Characteristics of the Laryngeal Nerve Paraganglia -- Central Terminations of Carotid Body Chemoreceptor Afferents -- Vascular Geometry of Arterial Chemoreceptors: Learning about the Carotid Body by Studying Paraganglia of the Superior Laryngeal Nerve -- Altered Function of Cat Carotid Body Chemoreceptors in Prolonged Hyperoxia -- Glycolysis as a Link for Chemoreception? -- Spectrophotometric Studies on Carotid Body Tissue -- ATP Content in the Cat Carotid Body under Different Experimental Conditions. Support for the Metabolic Hypothesis -- Pathways for Calcium Entry into Type I Cells: Significance for the Secretory Response -- Effects of Cyanide and Acetylcholine on Extracellular K+ and Ca++ Activities in the Cat Carotid Body -- Application of the Chemiluminescent Method to Carotid Body for Detecting Choline and Acetylcholine -- Monoamine Content and Metabolism in the Rabbit Carotid Body -- A Comparative Study of the Metabolism of Catecholamines in the Rabbit and Cat Carotid Body -- Release of Catecholamines by Electrical Stimulation of the Cat Carotid Sinus Nerve in Vitro -- Dopamine and 3, 4-Dihydroxyphenylacetic Acid Concentrations in Rat Carotid Body: The Effects of Chronic Hypoxia and Hyperoxia from Birth -- Prolonged Hyperoxia and Oligomycin have Similar Effects on Cat Carotid Body Chemoreceptors -- In Vitro Carotid Chemoreceptor Response to Hypoxia and Hypercapnia after Reserpinization or AMPT-Treatment in the Rabbit and in the Cat -- Regulation of Neuropeptide Levels in Sensory Receptors and Autonomic Ganglia -- Origin of Respiratory Oscillations in Chemoreceptor Discharge -- Afferent Activity in the Sinus Nerve of the Rabbit after Regeneration -- The Role of the Carotid Body in Acclimatization to Hypoxia -- The Role of the Peripheral Arterial Chemoreceptors in the Cardiovascular Responses of the Cat to Acute Systemic Hypoxia -- The Effect of Premature Delivery on Chemoreceptor Sensitivity in the Lamb -- Studies of Chemoreceptor Resetting after Hyperoxic Ventilation of the Fetus in Utero -- The Chemoreception of Hypoxia and Hypercapnia: Further Evidence for a Dual Sensing Mechanism -- Carotid Body Chemoreceptor Response to Transient Arterial Occlusion -- The Carotid Bodies in Coarctation of the Aorta -- The Carotid Bodies in a Case of Ventricular Septal Defect -- Histological Changes Associated with Ageing of the Human Carotid Body -- Slow Ventilatory Dynamics in Hypoxic Patients with Obstructive Airways Disease -- Propranolol Treatment Inhibits the Carotid Body Vascular Changes Evoked by Long-Term Hypoxia -- Acetylcholine- and Dopamine-Induced Excitation of Cultured Newborn Rabbit Nodose Ganglion Neurons: Effects of Co-Culture with Carotid Body Fragments -- Pharmacological Studies on Opioid Receptors in the Cat Carotid Body -- Chemoexcitation Evoked by Adenosine: Pharmacological Characterisation of the Receptor -- Adenosine Modulation of Respiration Mediated by Carotid Body Chemoreceptors -- Interference by Domperidone on Chemosensory and Ventilatory Responses to Dopamine -- The Double Reflexogenic Action of Lobeline, Acetylcholine and Cyanides on the Carotid Body, Influence of Phentolamine and Sulpiride -- Power Spectral Analysis of Chemoreceptor Discharges During Asphyxia and after Administration of Almitrine Bismesylate -- Peripheral Chemoreceptor Stimulation and Pulmonary Circulation in the Rat -- Almitrine Anatagonizes the Depressant Effect of the Morphinomimetic Agent, Fentanyl on Bulbar Respiratory Neurons -- Effects of Chronic Hypoxia on Chemoreceptor Function in the Newborn -- Reduction in Dopaminergic Activity in the Rat Carotid Body after Acute or Chronic Almitrine -- Carotid Body Responses to Administration of Almitrine Bismesylate -- Kinetics of Almitrine Bismesylate and its Metabolites in the Carotid Body and Other Tissues of the Rat.

Abstract. The use of high resolution hydrodynamic modelling to simulate the potential effects of tsunami events can provide relevant information about the most probable inundation areas. Moreover, the consideration of complementary data such as the type of buildings, location of priority equipment, type of roads, enables mapping of the most vulnerable zones, computing of the expected damage on man-made structures, constrain of the definition of rescue areas and escape routes, adaptation of emergency plans and proper evaluation of the vulnerability associated with different areas and/or equipment. Such an approach was used to evaluate the specific risks associated with a potential occurrence of a tsunami event in the region of Setúbal (Portugal), which was one of the areas most seriously affected by the 1755 tsunami. In order to perform an evaluation of the hazard associated with the occurrence of a similar event, high resolution wave propagation simulations were performed considering different potential earthquake sources with different magnitudes. Based on these simulations, detailed inundation maps associated with the different events were produced. These results were combined with the available information on the vulnerability of the local infrastructures (building types, roads and streets characteristics, priority buildings) in order to impose restrictions in the production of high-scale potential damage maps, escape routes and emergency routes maps.

International counterfeiting affects adversely producers, consumers and domestic economies. Some attempts have been made in the last years by international organisations (European Union, World Trade Organisation) to deal with this complex problem. Though some success has been achieved, the number of seizures of counterfeited goods detected in the external borders of EU has increased. This study examines the impact of Hofstede's cultural variables (power distance, individualism, masculinity, uncertainty avoidance) on the level of counterfeiting in European ...

Foreign Directo Investment (FDI) is increasingly important in the portuguese economy since it integration in the European Union (1986), although from 1997 onwards it has considerably decreased. In 1995 and 1996, the share of the FDI in the GDP reached it peak obtaining a value of 4,29 and 4,34 respectively. The manufacturing and retailing sectors represent a good part of the total FDI. In this paper we investigate the industrial and retail services location factors. Two surveys have been carried out allowing for the identification of the most preferable factors by the foreign investors. In the manufacturing sector the selection of Portugal to invest depended upon the labour costs and the importance of domestic market. In the retailing sector the government regulations, market size, cultural and geographic proximity to the host country are the most relevent factors.

PurposeResearch on economic entrepreneurship identifies a gender gap that is favorable to men. In the social entrepreneurship arena, the existing evidence is slightly fuzzy, as this gender gap is less preeminent. This paper aims to identify how gender differences in social entrepreneurial ventures creation are explained by different personality traits, by analyzing the extent to which female and male social entrepreneurs exhibit the same personality traits and whether potential differences are able to explain the differences in predisposition for the creation of new social entrepreneurial ventures.Design/methodology/approachA review of the literature on gender differences and personality traits in social entrepreneurship details the main theoretical developments and builds the hypotheses. Based on the Big Five model, the investigation uses a hypothesis testing quantitative approach. Primary data were collected through a questionnaire that was e-mailed and applied to the social entrepreneurs engaged in the creation of social ventures in Portugal.FindingsThe data gathered suggest that both female and male social entrepreneurs have personalities characterized by high levels of openness to experience, agreeableness, conscientiousness, extraversion and emotional stability. Based on the analysis of variance (ANOVA) between the two groups and logistic regression, the investigation reveals that women and men who launch a new social venture only differ in one personality dimension – agreeableness – wherein women scored more highly. No significant differences are found in the other personality traits.Research limitations/implicationsThe research assumes that most aspects of human personality structure are represented in the Big Five model.Practical implicationsThe knowledge about whether gender differences are explained by different personality traits is critical to public entities that might design appropriate public policies to stimulate social entrepreneurship. Also, social entrepreneurs' capacity building programs should be delineated in accordance with a deeper understanding about gender and personality traits differences.Social implicationsThe knowledge of the factors that affects the creation of new social ventures has an important potential contribution on social value creation and the promotion of gender equality.Originality/valueThis paper links two important topics – gender and entrepreneurs' personality traits – scarcely explored in the social entrepreneurship literature. Thus, the paper adds new empirical evidence to support (or not) the belief that personality and gender matter in the decision to launch a new social venture.

Salmonella is one of the major causes of food borne disease in the European Union (EU). Some of the human cases are related to pork products. An EU baseline survey to assess the Salmonella pork prevalence was performed. Mesenteric lymph nodes were cultured and Salmonella sp. isolates were serotyped. Data concerning the animal and the slaughterhouse was also collected. The aim of the present study was to search for potential risk factors to the presence of Salmonella sp. in pigs lymph nodes in Portugal and to search for differences in the risk profile between groups of serotypes. The data was analysed using a Bayesian approach to incorporate the hierarchical structure of the data (samples nested in slaughterhouses). Two models were analysed: a binomial (presence/absence of Salmonella sp.) and categorical model (absence of Salmonella sp., serotype Typhimurium or serotype 1,4,[5],12:i:-, other serotypes). A total number of 659 samples were tested, belonging to 36 slaughterhouses. Around 23.7% of the samples were positive for Salmonella sp. In the binomial model a significant association was found for region of the slaughterhouse - Lisbon and Tagus Valley Region with lower risk compared to the Centre Region (OR=0.36). In the categorical model a significant association for category Typhimurium or 1,4,[5],12:i:- was found for the variable hour when the sample was taken - afternoon with lower risk compared to morning (OR=0.20). The association found for the slaughterhouse region should be a matter of furthers studies to evaluate the hygiene practices in the slaughterhouses of that region.

Salmonella is the second most frequent cause of foodborne illness in the European Union (EU), so EU enforced legislation to achieve a reduction in Salmonella prevalence in the swine sector. To set the reduction target each country carried out a baseline survey to estimate Salmonella prevalence. The aim of our study was to identify risk factors for the presence of Salmonella in breeding pigs based on the data of the Baseline Study for Salmonella in Breeding Pigs in Portugal. In total, 1670 pen fecal samples from 167 herds were tested by culture and 170 samples tested positive. Along with the collection of the samples a survey was applied to collect information about the herd management and potential risk factors. Multilevel analysis was applied to the data using generalized linear mixed models and a logit link function. The outcome variable was the presence/absence of Salmonella in the pen fecal samples. The first level was assigned to the pen fecal samples and the second level to the herds. The results showed significant associations between Salmonella occurrence and the factors (p < 0.05): maternity pens versus mating pens (OR = 0.39, 95%CI: 0.24–0.63), feed from external or mixed source versus home source (OR = 2.81, 95%CI: 1.19–6.61), more than 10 animals per pen versus 10 animals per pen (OR = 2.02, 95%CI: 1.19–3.43), North Region versus Alentejo Region (OR = 3.86, 95%CI: 1.08–13.75), rodents control (OR = 0.23, 95%CI: 0.090–0.59), more than 90% of boars homebred or no boars versus more than 90% of boars from an external source (OR = 0.54, 95%CI: 0.3–0.97), semen from another herd versus semen from insemination centers (OR = 4.47, 95%CI: 1.38–14.43) and herds with a size of 170 or more sows (OR = 1.82, 95%CI: 1.04–3.19). This study offers very relevant information for both the Portuguese veterinary authorities and the pig farmers currently developing control programmes for Salmonella. This is the first study providing evidence for semen and boars source as risk factors for Salmonella in breeding pigs.

The experiment at HASYLAB/DESY was performed within the project I-20180036 EC. The research leading to this result has been supported by the project CALIPSOplus under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020. Filipe Correia is grateful to the Fundação para a Ciência e Tecnologia (FCT, Portugal) for the Ph.D. Grant SFRH/BD/111720/2015 . Joana Ribeiro is grateful to the Project WinPSC - POCI-01-0247-FEDER-017796, for the research grant, co-funded by the European Regional Development Fund (ERDF) , through the Operational Programme for Competitiveness and Internationalisation (COMPETE 2020), under the PORTUGAL 2020 Partnership Agreement. The authors acknowledge the funding from the following institution Fundação para a Ciência e Tecnologia (FCT, Portugal) /PIDDAC through the Strategic Funds project reference UID/FIS/04650/2013. The Spanish Ministry of Economy, Industry, and Competitiveness through the "Severo Ochoa" Program for Centers of Excellence in R&D (SEV-2015-0496), projects No. MAT2017-90024-P (TANGENTS)-EI/FEDER and MAT2015-70850-P (HIBRI2), and the Generalitat de Catalunya through grant 2017-SGR-00488 . M. K. acknowledges the Ph.D. programme in Materials Science from Universitat Autonoma de Barcelona in which she is enrolled. ; Transparent n-type niobium-doped titanium dioxide thin films (TiO2:1.5 at.%Nb) with pronounced thermoelectric properties were produced from a composite Ti:Nb target by reactive magnetron sputtering. The thin films were comprehensively characterized by X-ray diffraction, X-ray photoelectron spectroscopy, optical spectroscopy, electrical conductivity, and thermoelectric measurement techniques. The local structure of the thin films was investigated in detail by X-ray absorption spectroscopy at the Ti and Nb K-edges. A set of radial distribution functions were extracted from the simultaneous analysis of EXAFS data at two absorption edges using the reverse Monte Carlo method. It was found that Nb dopant atoms modify the local environment of the films, but their average structure remains close to that of the anatase phase. This conclusion is also supported by the ab initio simulations of XANES. A very high absolute Seebeck coefficient (S = 155 μV/K) for n-type TiO2 was achieved with Nb doping, yielding a maximum power factor and thermoelectric figure of merit of 0.5 mW m−1 K−2 and 0.18 at a temperature of 300 K, respectively, for a 150 nm thick film. From frequency-domain thermoreflectance experiments, a thermal conductivity value of 1.3 W m−1 K−1 was obtained for the optimized TiO2:Nb film. ; Fundo Regional para a Ciência e Tecnologia POCI-01-0247-FEDER-017796; Generalitat de Catalunya 2017-SGR-00488; MAT2015-70850-P,HIBRI2; SEV-2015-0496,MAT2017-90024-P; UID/FIS/04650/2013; European Regional Development Fund; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union's Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART²