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Search Results: 1 - 10 of 23510 matches for " Fernando Judas "
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Treatment of Bilateral Recurrent Dislocation of Hip Pros-thesis with Malpositioned Well-Fixed Shell: A Case Report  [PDF]
Fernando Judas, Luis Maximino, Francisco Lucas
Open Journal of Orthopedics (OJO) , 2013, DOI: 10.4236/ojo.2013.33031
Abstract: Dislocations of total hip prostheses cause pain and patient dissatisfaction. Recurrent dislocations are difficult to treat mainly when the acetabular metal shell is well-fixed. The purpose of this article was to describe the surgical technique used for the treatment of a bilateral recurrent posterior dislocation after a cementless total hip prosthesis, caused by excessive inclination of acetabular components, in a 72-year-old patient. On both sides, acetabular metal shell, porouscoated, was well-fixed. Revision of the entire acetabular component could be an appropriate therapeutic option because it was malpositioned. Nevertheless, a conservative operation was performed. The metal shell was left in situ and the preexisting polyethylene liner was removed and replaced by a new undersized cross-linked polyethylene liner, then, cemented into the shell and properly oriented. An acetabular cemented augmentation reinforced by 3 cortical screws was associated with the reconstruction. This report suggests that cementation of new liner into a malpositioned well- fixed metal shell associated with an acetabular cemented augmentation is a simple and safe technique for the management of recurrent hip dislocation, for elderly patients in which it is advisable to avoid a major revision hip surgery by medical comorbidities. Nonetheless, further studies with medium-and long-term follow-up are needed to validate this technique.
A technique to remove a well-fixed titanium-coated rm acetabular cup in revision hip arthroplasty
Fernando MJ Judas, Rui F Dias, Francisco M Lucas
Journal of Orthopaedic Surgery and Research , 2011, DOI: 10.1186/1749-799x-6-31
Abstract: In the following case report, we removed a well-fixed polyethylene titanium-coated RM acetabular cup with 20 years of follow-up, by significant wear of the polyethylene layer. The isoelastic femoral stem was also removed by mechanical failure.We report a technique for removal of the cementless acetabular cup using powered acetabular reamers. The RM cup was sequentially reamed and when the polyethylene layer was thin enough, the remaining cup was removed easily by hand tools. The acetabular bone stock is preserved and the risks of bone fractures and bleeding are minimized. To our knowledge, these principles were applied only in cemented cups.We have used this technique in 10 cases with excellent results and no complications were noted. This is a simple, reproducible, non-costly, non-timing consuming, safe and successful technique to remove well-fixed titanium-coated RM acetabular cups.The purpose of revision hip arthroplasty is to reconstruct the hip to reproduce, as closely as possible, the form and function of the native joint. The indications for revision include significant polyethylene wear, fractures of the components, component malposition, hip instability, severe thigh pain, excessive damage to the femoral Morse taper, and severe infection [1-3].In revision hip surgery, the removal of well-fixed cementless components can be extremely demanding, time consuming, and requiringes patience and caution to limit the amount of host bone destruction. Many surgeons opt to retain a well-fixed acetabular cup unless it is malpositioned or shows signs of impingement or severe wear. Fortunately, indications for implant removal are scarce, and most of the contemporary cementless components perform very well through improved bony ingrowth [4-6].Because of the diversity of the components and the methods used to secure them, an equal diversity of approaches and tools are necessary for component extraction. Component removal in total hip arthroplasty revision is a crucial and es
Impaired glucose transporter-1 degradation and increased glucose transport and oxidative stress in response to high glucose in chondrocytes from osteoarthritic versus normal human cartilage
Susana C Rosa, Juliana Gon?alves, Fernando Judas, Ali Mobasheri, Celeste Lopes, Alexandrina F Mendes
Arthritis Research & Therapy , 2009, DOI: 10.1186/ar2713
Abstract: Chondrocytes, isolated from normal and OA human cartilage, were maintained in high-density monolayer cultures, in media without or with 10 or 30 mM glucose. Glucose transport was measured as the uptake of 2-deoxy-D-glucose (2-DG). Glucose transporter-1 (GLUT-1) mRNA and protein content were evaluated by real-time RT-PCR and western blot, respectively. ROS production was measured with 2',7'-dichlorodihydrofluorescein diacetate.Basal and IL-1β-induced 2-DG uptake, including the affinity (1.066 ± 0.284 and 1.49 ± 0.59 mM) and maximal velocity (0.27 ± 0.08 and 0.33 ± 0.08 nmol/μg protein/hour), and GLUT-1 content were identical in normal and OA chondrocytes. Glucose deprivation increased 2-DG uptake and GLUT-1 protein both in normal and OA chondrocytes. Exposure to high glucose (30 mM) for 18 or 48 hours decreased those parameters in normal but not in OA chondrocytes. GLUT-1 mRNA levels were unaffected by high glucose, either in normal or OA chondrocytes. The high glucose-induced reduction in GLUT-1 protein in normal chondrocytes was reversed by treatment with a lysosome inhibitor. High glucose induced ROS production, which lasted significantly longer in OA than in normal chondrocytes.Normal human chondrocytes adjust to variations in the extracellular glucose concentration by modulating GLUT-1 synthesis and degradation which involves the lysosome pathway. Although capable of adjusting to glucose deprivation, OA chondrocytes exposed to high glucose were unable downregulate GLUT-1, accumulating more glucose and producing more ROS. Impaired GLUT-1 downregulation may constitute an important pathogenic mechanism by which conditions characterized by hyperglycemia, like DM, can promote degenerative changes in chondrocytes that can facilitate the progression of OA.Osteoarthritis (OA) is the most common musculoskeletal disorder and a major cause of disability that affects diarthrodial joints, being characterized by cartilage degradation, accompanied by local inflammation and cha
A educa??o do caipira: sua origem e forma??o
Campos, Judas Tadeu de;
Educa??o & Sociedade , 2011, DOI: 10.1590/S0101-73302011000200014
Abstract: this text atempts to understand the "curriculum" that, for centuries, has allowed caipiras to transmit their culture. it tries to show that this educational process involved daily work, religiosity and group solidarity. it is a critical qualitative research that brings forward an ethnographic case from a holistic perspective. analyses were progressive theorizations developed during the research, in interaction with fieldwork. in its conclusion, this paper highlights the impact of rural migration and school on the caipira culture and as well as of the consequences of the current education policies in rural areas
Festas juninas nas escolas: li??es de preconceitos
Campos, Judas Tadeu de;
Educa??o & Sociedade , 2007, DOI: 10.1590/S0101-73302007000200015
Abstract: the parties promoted by the brazilian schools during the month of june mainly aim at pupils' entertainment. yet, they also offer a prejudiced view of the caipira culture, which, along the centuries, has marked the way of life of the inhabitants of the state of s?o paulo. apparently, no teachers or pupils seem to realize this aspect. this text seeks to understand why the school community preserves such a paradoxical behavior in an educational institution.
Uma pesquisa pioneira para a compreens?o da cultura caipira
Campos, Judas Tadeu de;
Estudos Avan?ados , 2012, DOI: 10.1590/S0103-40142012000300030
Abstract: the anthropologist emilio willems produced, in the middle of the 1940 decade, the first brazilian community study. he did the research in the municipality of cunha, located in a highland country, between the quebra-cangalha and mar mountains, in the paraiba valley. but that study had another attribute: it is considered a precursor academic inquiry to treat respectfully and to give a significant contribution for the understanding of the caipira culture, that is, the way of life of the early dwellers in the rural area in the state of sao paulo. this text search demonstrate how that work was realized, the receptivity which it had in the academicals ambiences and his repercussions in others sociological researches.
Estratégias de comercializa??o da soja: análise de portfólios, sob condi??es de risco
Mendes, Judas Tadeu Grassi;Padilha Junior, Jo?o Batista;
Produ??o , 2008, DOI: 10.1590/S0103-65132008000300003
Abstract: the soybeans complex represents a fundamental role in the brazilian agribusiness. however, at the time of soybeans marketing, producers face a dilemma: "when", "how much" and "how" to sell their production, due to the uncertainties of this activity under risk conditions. by this way, using a mathematical model of quadratic programming, this work has searched for the best portfolio, trying to increase their incomes with some level of risk or to decrease risks at some income level. the most efficient plan is related to producers with medium risk aversion (α = 0,3). this optimum marketing plan shows that soybean producers of paraná state could store production at the harvest time in order to sell later following, for instance, this schedule: 21,9% in september; 25,1% in october; 19,9% in november and 23,9% in december, which means that 90,8% of all sales concentrated on the last four months of the year.
Migratory Pathways and Connectivity in Asian Houbara Bustards: Evidence from 15 Years of Satellite Tracking
Olivier Combreau,Samuel Riou,Jacky Judas,Mark Lawrence,Frédéric Launay
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0020570
Abstract: Information on migratory pathways and connectivity is essential to understanding population dynamics and structure of migrant species. Our manuscript uses a unique dataset, the fruit of 103 individual Asian houbara bustards captured on their breeding grounds in Central Asia over 15 years and equipped with satellite transmitters, to provide a better understanding of migratory pathways and connectivity; such information is critical to the implementation of biologically sound conservation measures in migrant species. At the scale of the distribution range we find substantial migratory connectivity, with a clear separation of migration pathways and wintering areas between western and eastern migrants. Within eastern migrants, we also describe a pattern of segregation on the wintering grounds. But at the local level connectivity is weak: birds breeding within the limits of our study areas were often found several hundreds of kilometres apart during winter. Although houbara wintering in Arabia are known to originate from Central Asia, out of all the birds captured and tracked here not one wintered on the Arabian Peninsula. This is very likely the result of decades of unregulated off-take and severe habitat degradation in this area. At a time when conservation measures are being implemented to safeguard the long-term future of this species, this study provides critical data on the spatial structuring of populations.
Mechanism of cell inactivation by different ions: Damage induction probabilities per single tracks
Pavel Kundrát,Milo? Lokají?ek,Hana Hrom?íková,Libor Judas
Physics , 2005,
Abstract: Biological effects of proton and light ion irradiations have been studied in detail by analyzing published cell survival data with the help of the probabilistic two-stage radiobiological model. Probabilities of single ion tracks to induce lesions of different severity have been assessed in dependence on their linear energy transfer (LET). The results are presented and their interpretation in terms of $Z_{eff}^2/\beta^2$ (the effective charge over velocity squared) is discussed.
Conhecimento e uso do ouricuri (Syagrus coronata) e do baba?u (Orbignya phalerata) em Buíque, PE, Brasil
Rufino, Márcio Ulisses de Lima;Costa, Judas Tadeu de Medeiros;Silva, Valdeline Atanasio da;Andrade, Laise de Holanda Cavalcanti;
Acta Botanica Brasilica , 2008, DOI: 10.1590/S0102-33062008000400025
Abstract: the palm tree flora of brazilian northeast includes 80 native species, with a low level of endemism (27.5%), some of them threatened by the destructive alterations of the natural habitat, associated to disordered exploration. this study investigated the importance of the ouricuri (syagrus coronata) and the baba?u (orbignya phalerata) in a community established near the catimbau valley national park, buíque municipality, pernambuco state. these species' importance to the local population was analyzed based on the following aspects: number of uses, informant number who utilize their products directly or indirectly; informants' concensus level of the reported uses. the data was obtained from semi-structured interviews (60 informants) and from indexes based on informant consensus techniques. seven use categories were cited: human food, domestic animal food, wild animal food, construction, folk art, fuel, medicine. despite of the diversity of uses (sc = 33; oph = 25), the two species' importance is predominantly linked to the almond's usage - as shown by the fruit value indexes (sc = 0.48; oph = 0.56). analyzing each species' contribution to the total use, the ouricuri had a higher value (8.58) in relation to the baba?u (6.31). indications of a knowledge erosion process were observed, and the informants pointed out that several uses were no longer practiced in the community - especially those linked to folk art.
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