13 research outputs found
Aggressive fibromatosis of the head and neck: a new classification based on a literature review over 40 years (1968-2008)
BACKGROUND: Fibromatosis is an aggressive fibrous tumor of unknown etiology that is, in some cases, lethal. Until now, there has been no particular classification for the head and neck. Therefore, the aim of the present study was to review the current literature in order to propose a new classification for future studies. METHODS: An evidence-based literature review was conducted from the last 40Â years regarding aggressive fibromatosis in the head and neck. Studies that summarized patients' data without including individual data were excluded. RESULTS: Between 1968 and 2008, 179 cases with aggressive fibromatosis of the head and neck were published. The male to female ratio was 91 to 82 with a mean age of 16.87Â years, and 57.32% of the described cases that involved the head and neck were found in patients under 11Â years. The most common localization was the mandible, followed by the neck. All together, 143 patients were followed up, and in 43 (30.07%), a recurrence was seen. CONCLUSION: No clear prognostic factors for recurrence (age, sex, or localization) were observed. A new classification with regard to hormone receptors and bone involvement could improve the understanding of risk factors and thereby assist in future studies
New Insights on the Management of Wildlife Diseases Using Multi-State Recapture Models: The Case of Classical Swine Fever in Wild Boar
The understanding of host-parasite systems in wildlife is of increasing interest in relation to the risk of emerging diseases in livestock and humans. In this respect, many efforts have been dedicated to controlling classical swine fever (CSF) in the European Wild Boar. But CSF eradication has not always been achieved even though vaccination has been implemented at a large-scale. Piglets have been assumed to be the main cause of CSF persistence in the wild since they appeared to be more often infected and less often immune than older animals. However, this assumption emerged from laboratory trials or cross-sectional surveys based on the hunting bags.In the present paper we conducted a capture-mark-recapture study in free-ranging wild boar piglets that experienced both CSF infection and vaccination under natural conditions. We used multi-state capture recapture models to estimate the immunization and infection rates, and their variations according to the periods with or without vaccination. According to the model prediction, 80% of the infected piglets did not survive more than two weeks, while the other 20% quickly recovered. The probability of becoming immune did not increase significantly during the summer vaccination sessions, and the proportion of immune piglets was not higher after the autumn vaccination.Given the high lethality of CSF in piglets highlighted in our study, we consider unlikely that piglets could maintain the chain of CSF virus transmission. Our study also revealed the low efficacy of vaccination in piglets in summer and autumn, possibly due to the low palatability of baits to that age class, but also to the competition between baits and alternative food sources. Based on this new information, we discuss the prospects for the improvement of CSF control and the interest of the capture-recapture approach for improving the understanding of wildlife diseases
Ueberwachung des Resin Transfer Moulding (RTM) Verfahrens mit Hilfe der Ultraschallmesstechnik zur umweltgerechten Herstellung von Faserverbundkunststoffen (FVK) Abschlussbericht 2003
The RTM production process for composite components has established itself in the small to middle series market sector. Particularly the manufacture of complex components require a high level of experience and know-how. The application of process control techniques has had only limited success in the past and it is only in recent years with the development of fast processing technologies that new measuring techniques are economically as well as practically viable for integration into large scale production processes. The ultrasound technique presented in this paper can be employed firstly to monitor flow front and mould filling as well as fibre impregnation and secondly to monitor the curing process. The ultrasound sensors are designed for application at high temperature and pressures and can be incorporated behind the mould wall, leaving no impression or marks on the final moulded part. From the ultrasound data it was possible to correlate changes in process parameters with material properties and therefore optimise the RTM production process. The range of application for the ultrasound technology will be discussed and the results compared to conventional reference methods e.g. rheometry and DSC. This provides a foundation for the interpretation of the ultrasound data in terms of flow and cure behaviour and their significance for the RTM process (e.g. mould filling, fibre impregnation and cure). (orig.)Available from TIB Hannover: F04B110 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany)DEGerman
Induction of Benign Symmetric Lipomatosis (Launois-Bensaude Syndrome) in a Female Patient after Liver Transplantation
Effect of ochratoxin A-producing Aspergilli on stilbenic phytoalexin synthesis in grapes
Berries of Vitis vinifera L. cv. Barbera were infected, at veraison and during ripening, by a conidial suspension of A. japonicus, A. ochraceus, A. fumigatus and two isolates of A. carbonarius to control ochratoxin A production and stilbene induced synthesis. The experimental design provided also for intact and punctured berries and incubation temperature of 25 degrees C and 30 degrees C. All the tested fungi, except A. fumigatus, significantly increased trans-resveratrol synthesis over the control, while trans-piceid was not affected; only A. ochraceus significantly elicited the berries to synthesize piceatannol. The two isolates of A. carbonarius produced higher amounts of ochratoxin A than did the other fungi. A positive correlation between ochratoxin A and trans-resveratrol synthesis occurred. trans-Resveratrol and piceatannol showed fungicidal activity against A. carbonarius, being able to completely inhibit fungal growth at a concentration of 300 micro g/g and 20 micro g/g, respectively