Jorge Canena, David Horta, João Coimbra, Liliane Meireles, Pedro Russo, Inês Marques, Leonel Ricardo, Catarina Rodrigues, Tiago Lima Capela, Diana Carvalho, Rafaela Loureiro, António Mateus Dias, Gonçalo Ramos, António Pereira Coutinho, Carlos Romão, Pedro Mota Veiga,
Biliary leaks have been treated with endoscopic management using different techniques with conflicting results. Furthermore the appropriate rescue therapy for refractory leaks has not been established. We evaluated the clinical effectiveness of initial endotherapy for postcholecystectomy biliary leaks using an homogenous approach (sphincterotomy + placement of a 10-French plastic stent) in a large series of patients as well as the optimal and efficacy of rescue endotherapy for refractory biliary leaks. ...
Tópico(s): Pediatric Hepatobiliary Diseases and Treatments
2015 - BioMed Central | BMC Gastroenterology
Jorge Canena, João Coimbra, Diana Carvalho, Catarina Rodrigues, Mário J. Silva, Mariana Costa, David Horta, António Mateus Dias, Isabel Seves, Gonçalo Ramos, Leonel Ricardo, António Pereira Coutinho, Carlos Romão, Pedro Mota Veiga,
Tópico(s): Biliary and Gastrointestinal Fistulas
2014 - Springer Science+Business Media | Digestive Diseases and Sciences
Manuel Coelho da Rocha, Tiago Capela, Mário Jorge Silva, Gonçalo Ramos, João Coimbra,
Colonic volvulus, mainly from the sigmoid, is a relatively common cause of intestinal obstruction, particularly in the elderly and in patients with debilitating conditions. The high morbi-mortality of emergency surgery places the endoscopic approach as the first-line treatment for the resolution of this acute obstructive condition.To assess the importance of endoscopic treatment for the resolution of colonic volvulus in a debilitated population.This is a retrospective analysis of emergency lower ...
Tópico(s): Esophageal and GI Pathology
2019 - Karger Publishers | GE Portuguese Journal of Gastroenterology
Diana Carvalho, Mariana Costa, Pedro Russo, Luís Simas, Teresa Baptista, Gonçalo Ramos,
Pancreatic cystic lymphangiomas are rare benign lesions that arise from lymphatic vessels, accounting for less than 0.2% of all pancreatic cysts. Typically it is asymptomatic and discovery occurs during imaging exams for non-pancreatic disease. In the past, a definite diagnosis was made through surgery, with complete resection of all tumoral tissue to prevent recurrence. Nowadays, the development of endoscopic ultrasound (EUS) made it possible to identify these cysts combining morphologic ultrasound ...
Tópico(s): Gastrointestinal disorders and treatments
2016 - Karger Publishers | GE Portuguese Journal of Gastroenterology
Carlos Bernardes, Sara Santos, Rafaela Loureiro, Verónica Pavão Borges, Gonçalo Ramos,
Rendu-Osler-Weber disease, also known as hereditary hemorrhagic telangiectasia, is a rare autosomal dominant disorder which is often characterized by recurrent epistaxis, mucocutaneous and gastrointestinal telangiectasias, and visceral arteriovenous malformations. Patients with gastrointestinal involvement can present with a wide spectrum of severity, which may vary from uncomplicated iron deficiency anemia to continuous and refractory bleeding. We present the case of a 62-year-old female, who was ...
Tópico(s): Sharing Economy and Platforms
2017 - Karger Publishers | GE Portuguese Journal of Gastroenterology
Jorge Paulino, Gonçalo Ramos, Filipe Veloso Gomes,
Acute pancreatitis (AP) is an inflammatory condition with a mild course in most patients, but 20–30% evolve to single or multiple organ dysfunction and pancreatic/peripancreatic necrosis, with potentially infected collections. In the first weeks of disease, a systemic inflammatory syndrome (SIRS) dominates the clinical setting, and early management decisions in this precocious phase can change the course of the disease. Imaging is crucial in the diagnosis, and since the adoption of the revised Atlanta ...
Tópico(s): Appendicitis Diagnosis and Management
2019 - Multidisciplinary Digital Publishing Institute | Journal of Clinical Medicine
Gonçalo Ramos dos Lóios, Rui F. Martins, António Ginjeira, Mircea Viorel Drăgoi, George Răzvan Buican,
The objective of the research herein presented was to assess the time to fracture of Hyflex CM files subjected to rotational bending tests, with or without back and forth motion, in an apical canal similar to those existent in a real tooth with multiplanar curvatures. Therefore, a lower first molar was modelled and manufactured in an AISI 316L stainless steel using selective laser melting technology, featuring the required multiplanar curvatures, which were confirmed by radiography. Thereafter, ...
Tópico(s): Occupational health in dentistry
2016 - Elsevier BV | Procedia Engineering
Carlos Bernardes, Diana Carvalho, Gonçalo Ramos,
... PortugalSearch for more papers by this authorGonçalo Ramos, Gonçalo Ramos Gastroenterology Department, Centro Hospitalar de Lisboa Central, Nova ... PortugalSearch for more papers by this authorGonçalo Ramos, Gonçalo Ramos Gastroenterology Department, Centro Hospitalar de Lisboa Central, Nova ...
Tópico(s): Gastrointestinal Tumor Research and Treatment
2017 - Wiley | Digestive Endoscopy
Marc Oliva, Filip Hrbáček, Jesús Ruiz‐Fernández, Miguel Ángel de Pablo Hernández, Gonçalo Vieira, Miguel Ramos, Dermot Antoniades,
Topography exerts a key role in controlling permafrost distribution in areas where mean annual temperatures are slightly negative. One such case is the low-altitude environments of Maritime Antarctica, where permafrost is sporadic to discontinuous below 20–40 m asl and continuous at higher areas and active layer dynamics are thus strongly conditioned by geomorphological setting. In January 2014 we installed three sites for monitoring active layer temperatures across Byers Peninsula (Livingston Island, ...
Tópico(s): Polar Research and Ecology
2016 - Elsevier BV | CATENA
Filip Hrbáček, Marc Oliva, Kamil Láska, Jesús Ruiz‐Fernández, Miguel Ángel de Pablo Hernández, Gonçalo Vieira, Miguel Ramos, Daniel Nývlt,
Permafrost controls geomorphic processes in ice-free areas of the Antarctic Peninsula (AP) region. Future climate trends will promote significant changes of the active layer regime and permafrost distribution, and therefore a better characterization of present-day state is needed. With this purpose, this research focuses on Ulu Peninsula (James Ross Island) and Byers Peninsula (Livingston Island), located in the area of continuous and discontinuous permafrost in the eastern and western sides of the ...
Tópico(s): Polar Research and Ecology
2016 - University of La Rioja | Cuadernos de Investigación Geográfica
Alice Ferreira, Gonçalo Vieira, Miguel Ramos, Alexandre Nieuwendam,
The Western Antarctic Peninsula region shows mean annual air temperatures ranging from − 4 to − 2 °C. Due to its proximity to the climatic threshold of permafrost, and evidence of recent changes in regional air temperatures, this is a crucial area to analyse climate-ground interactions. Freezing indexes and n-factors from contrasting topographic locations in Hurd Peninsula (Livingston Island) are analysed to assess the influence of snow cover on soil's thermal regime. The snow pack duration, thickness ...
Tópico(s): Arctic and Antarctic ice dynamics
2016 - Elsevier BV | CATENA
James G. Bockheim, Gonçalo Vieira, Miguel Ramos, Jerónimo López‐Martínez, Enrique Serrano, Mauro Guglielmin, Kelly Wilhelm, Alexandre Nieuwendam,
Dramatic warming of the climate over the last several decades has influenced the properties and distribution of permafrost in the Antarctic Peninsula region. Five approaches were used to estimate the distribution of permafrost in the region: (1) correlation of permafrost distribution with mean annual air temperature isotherms, (2) mapping the distribution of periglacial features indicative of permafrost, (3) summarizing data from shallow excavations and boreholes, (4) detection of permafrost from geophysical ...
Tópico(s): Polar Research and Ecology
2012 - Elsevier BV | Global and Planetary Change
A. Correia, Gonçalo Vieira, Miguel Ramos,
During the month of January of 2008 a borehole (Permamodel-Gulbenkian 1 — PG1) 26 m deep was drilled on the top of Mount Reina Sofia (275 m a.s.l.) near the Spanish Antarctic Station of Livingston Island, South Shetland Islands. Cores from 1.5 m to about 26 m deep were collected for measuring several physical properties. The objective of the present work is to report the values of the thermal conductivity and the thermal diffusivity that were measured in the cores from the borehole and the heat production ...
Tópico(s): Cryospheric studies and observations
2011 - Elsevier BV | Geomorphology
Sara Santos, Carlos Bernardes, Verónica Pavão Borges, Gonçalo Ramos,
Tópico(s): Esophageal and GI Pathology
2019 - Springer Science+Business Media | Annals of Hematology
Mariana Costa, Jorge Canena, Luís Mascarenhas‐Lemos, Rafaela Loureiro, Mário J. Silva, Diana Carvalho, Tiago Lima Capela, Pedro Russo, Gonçalo Ramos, António Mateus-Dias, Mário Ferraz-Oliveira, Pedro Mota Veiga, João Coimbra,
Brush cytology during endoscopic retrograde cholangiopancreatography (ERCP) is the most frequently used strategy for obtaining a tissue sample from an indeterminate biliary stricture. A recent study reported that age is a factor associated with positive yields, but further analysis of how age influences the results was lacking. We aimed to evaluate clinical effectiveness of biliary cytology and prognostic factors for a positive outcome, especially age.This study was a single-center, retrospective, ...
Tópico(s): Cholangiocarcinoma and Gallbladder Cancer Studies
2018 - Karger Publishers | GE Portuguese Journal of Gastroenterology
Rute R. da Fonseca, Anders Albrechtsen, Gonçalo Espregueira Themudo, Jazmín Ramos‐Madrigal, Jonas A. Sibbesen, Lasse Maretty, Marie Lisandra Zepeda Mendoza, Paula F. Campos, Rasmus Heller, Ricardo J. Pereira,
As sequencing technologies become more affordable, it is now realistic to propose studying the evolutionary history of virtually any organism on a genomic scale. However, when dealing with non-model organisms it is not always easy to choose the best approach given a specific biological question, a limited budget, and challenging sample material. Furthermore, although recent advances in technology offer unprecedented opportunities for research in non-model organisms, they also demand unprecedented ...
Tópico(s): Evolution and Genetic Dynamics
2016 - Elsevier BV | Marine Genomics
Márcio Costa, Gonçalo Silva, R. Valdés Ramos, H. R. Staempfli, Luis G. Arroyo, P. Kim, J. Scott Weese,
The advance of new sequencing technologies has allowed more comprehensive characterization of complex microbial communities, including the ones inhabiting the intestinal tract. The presence of extreme environmental filters, such as low pH, digestive enzymes and anaerobic conditions along the tract, acts on the selection of unique bacteria in each compartment. The intestinal microbiota has an enormous impact on the maintenance of health. However, data about the bacteria present in the different intestinal ...
Tópico(s): Clostridium difficile and Clostridium perfringens research
2015 - Elsevier BV | The Veterinary Journal
Produção Nacional
Revisado por pares
Filip Hrbáček, Marc Oliva, Christel Hansen, Megan R. Balks, Tanya O’Neill, Miguel Ángel de Pablo Hernández, Stefano Ponti, Miguel Ramos, Gonçalo Vieira, Andrey Abramov, Lucia Kaplan Pastíriková, Mauro Guglielmin, Gabriel Goyanes, Márcio Rocha Francelino, Carlos Ernesto Gonçalves Reynaud Schaefer, Denis Lacelle,
Ice-free areas occupy 5 m in bedrock sites in the Antarctic Peninsula. The deepest and most variable ALTs (ca. 40 to >500 cm) were found in the Antarctic Peninsula, whereas the maximum ALT generally did not exceed 90 cm in Victoria Land and East Antarctica. Notably, found that the mean annual near-surface temperature follows the latitudinal gradient of −0.9 °C/deg. (R2 = 0.9) and the active layer thickness 3.7 cm/deg. (R2 = 0.64). The continuous permafrost occurs in the vast majority of the ice-free areas ...
Tópico(s): Cryospheric studies and observations
2023 - Elsevier BV | Earth-Science Reviews
Gonçalo Abraços-Duarte, Susana Ramos, Fernanda Valente, Elsa Borges da Silva, Elisabete Figueiredo,
Dicyphine mirids are important biological control agents (BCAs) in horticultural crops. Dicyphus cerastii Wagner can be found in protected tomato crops in Portugal, and has been observed feeding on several tomato pests. However, the predation capacity of this species is poorly studied. In order to investigate the predation capacity of D. cerastii, and how it is affected by prey size and mobility, we evaluated the functional response (FR) and predation rate of female predators on different densities ...
Tópico(s): Biological Control of Invasive Species
2021 - Multidisciplinary Digital Publishing Institute | Insects
Miguel Ramos, Gonçalo Vieira, Miguel Ángel de Pablo Hernández, A. Molina, Juan Javier Jiménez,
The Antarctic Peninsula (AP) region has been one of the regions on Earth with strongest warming since 1950. However, the northwest of the AP showed a cooling from 2000 to 2015, which had local consequences with an increase in snow accumulation and a deceleration in the loss of mass from glaciers. In this paper, we studied the effects of increased snow accumulation in the permafrost thermal regime in two boreholes (PG1 and PG2) in Livingston Island, South Shetlands Archipelago, from 2009 to 2015. The ...
Tópico(s): Geology and Paleoclimatology Research
2020 - Multidisciplinary Digital Publishing Institute | Atmosphere
Miguel Ramos, Gonçalo Vieira, Miguel Ángel de Pablo Hernández, A. Molina, Andrey Abramov, Gabriel Goyanes,
The Western Antarctic Peninsula region is one of the hot spots of climate change and one of the most ecologically sensitive regions of Antarctica, where permafrost is near its climatic limits. The research was conducted in Deception Island, an active stratovolcano in the South Shetlands archipelago off the northern tip of the Antarctic Peninsula. The climate is polar oceanic, with high precipitation and mean annual air temperatures (MAAT) close to − 3 °C. The soils are composed by ashes and pyroclasts ...
Tópico(s): Polar Research and Ecology
2016 - Elsevier BV | CATENA
Ana Paula Oliveira, Teresa A. Coutinho, G. Cabeçadas, M. J. Brogueira, Josep Coca, Manuela Ramos, Gonçalo Calado, Pedro Duarte,
Gorringe bank is a shallow seamount having its summit within the euphotic layer. The purpose of this study was to test the hypothesis that the interaction of ocean currents with shallow water seamounts, as the Gorringe, has a significant effect on local upwelling and primary production. Three hydrographic surveys were carried out: one in autumn (October 2011) and two in summer (June and July 2012). Physical (salinity, temperature), chemical (nutrients, dissolved oxygen, pH, total alkalinity and suspended ...
Tópico(s): Oceanographic and Atmospheric Processes
2016 - Elsevier BV | Journal of Marine Systems
Helena R. Batalha, Jaime A. Ramos, Gonçalo C. Cardoso,
Biological invasions often threaten biodiversity, yet their ecological effects are unpredictable and in some cases may be neutral. Assessing potential interactions between invasive and native species is thus important to understand community functioning and prioritize conservation efforts. With this purpose, we compared the ecological niche and occurrence of a successful avian invader in SW Europe, the common waxbill (Estrildidae: Estrilda astrild), with those of co-occurring native passerine species. ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2013 - Elsevier BV | Acta Oecologica
Produção Nacional
Revisado por pares
Rosana Goldbeck, Mayla M. Ramos, Gonçalo Amarante Guimarães Pereira, Francisco Maugeri‐Filho,
The objective of the present study was to evaluate the production of cellulolytic enzymes by Acremonium strictum isolated from Brazilian Biome using different substrates. Fermentations were initially carried out using commercial substrates, including microcrystalline cellulose (AVICEL® and SERVACEL®) and carboxymethylcellulose (CMC). This was followed by fermentations performed using lignocellulosic biomass: sugarcane bagasse pretreated at different intensities. The fermentations were carried out ...
Tópico(s): Microbial Metabolites in Food Biotechnology
2012 - Elsevier BV | Bioresource Technology
Produção Nacional
Revisado por pares
Ana Paula Cândido Gabriel Berilli, Messias Gonzaga Pereira, Leandro Simões Azeredo Gonçalves, Keila Silva da Cunha, Helaine Christine Cancela Ramos, Gonçalo Apolinário de Souza Filho, Antônio Teixeira do Amaral Júnior,
We examined the effect of incorporation of molecular markers on variability between and within populations in order to maximize heterotic effects and longevity of a maize reciprocal recurrent selection program. Molecular variability was quantified by inter-simple sequence repeat (ISSR) markers between and within the maize populations Cimmyt and Piranão in the 10th cycle of a reciprocal recurrent selection program. Forty-two S(1) progenies of each population were analyzed, these being families of ...
Tópico(s): Plant Virus Research Studies
2011 - Research Foundation of Ribeirão Preto | Genetics and Molecular Research
Abstract. The annual evolution of the ground temperatures from Incinerador borehole in Livingston Island (South Shetlands, Antarctic) is studied. The borehole is 2.4 m deep and is located in a massive quartzite outcrop with negligible water content, in the proximity of the Spanish Antarctic Station Juan Carlos I. In order to model the movement of the 0°C isotherm (velocity and maximum depth) hourly temperature profiles from: (i) the cooling periods of the frost season of 2000 to 2005, and (ii) the warming ...
Tópico(s): Polar Research and Ecology
2009 - Copernicus Publications | The cryosphere
Miguel Ramos, Gonçalo Vieira, J. J. Blanco, Christian Hauck, M. A. Hidalgo, D. Tomé, Michele de Nevers, A. Trindade,
This paper describes results obtained from scientific work and experiments performed on Livingston and Deception Islands. Located in the South Shetland Archipelago, these islands have been some of the most sensitive regions over the last 50 years with respect to climate change with a Mean Annual Air Temperature (MAAT) close to -2 ºC. Three Circumpolar Active Layer Monitoring (CALM) sites were installed to record the thermal regime and the behaviour of the active layer in different places with similar ...
Tópico(s): Polar Research and Ecology
2007 - United States Department of the Interior | Antarctica A Keystone in a Changing World
Diana Carvalho, Pedro Russo, Carlos Bernardes, Joana Saiote, Gonçalo Ramos, Luís Paulo Gomes Mascarenhas, Nuno Borges, Jaime Ramos,
<b><i>Introduction:</i></b> Lymphoproliferative disorders, particularly non-Hodgkin's and Hodgkin's lymphomas, are rare in patients with inflammatory bowel diseases. The use of thiopurines and infection by Epstein-Barr virus are well-known cofactors that can raise its prevalence. Other risk factors such as disease activity and biological treatment are the subject of discussion, without enough data in the literature to confirm a potential association. <b><i>Methods:</ ...
Tópico(s): Chronic Lymphocytic Leukemia Research
2017 - Karger Publishers | GE Portuguese Journal of Gastroenterology
Rui F. Martins, Alexandre Rodrigo Mendes Fernandes, Gonçalo Ramos dos Lóios, António Ginjeira,
Purpose The purpose of this paper is to assess the fatigue life of different sizes of HyFlex CM™ endodontic files when submitted to planar or to non-planar curvatures, and to two different rotational speeds, namely 500 rpm or 250 rpm. The influence of superimposing back and forth motion to rotational bending of endodontic files was also assessed. Design/methodology/approach In all, 64 HyFlex CM™ files of different sizes, namely ref. 0.04/20, 0.06/20, 0.04/35 and 0.06/35, were submitted to rotational ...
Tópico(s): Occupational health in dentistry
2017 - Emerald Publishing Limited | International Journal of Structural Integrity
Diana Carvalho, Rafaela Loureiro, Verónica Pavão Borges, Pedro Russo, Carlos Bernardes, Gonçalo Ramos,
<b><i>Background:</i></b> Paraduodenal pancreatitis is a rare cause of chronic abdominal pain characterized by an inflammatory process and scarring in the groove area between the pancreatic head and the duodenal wall. Besides abdominal pain, symptoms such as vomiting and weight loss are common. Currently, advances in radiological and endoscopic diagnostic methods allow it to be identified without histological confirmation, although the differentiation from pancreatic adenocarcinoma ...
Tópico(s): Gastrointestinal Tumor Research and Treatment
2016 - Karger Publishers | GE Portuguese Journal of Gastroenterology