Patología de ligamentos en la meseta tibial

X Congreso Nacional de Paleopatología. Univesidad Autónoma de Madrid, septiembre de 200

La extirpación de la grasa de Hoffa y de la porción central del tendón rotuliano: Estudio experimental en la rodilla del conejo

Se estudia la repercusión de la extirpación parcial de la grada de Hoffa, y de ésta junto con el tercio central del tendón rotuliano en la rodilla de 16 conejos machos adultos, seguidos durante 6 meses. En los 6 casos que completan el estudio con extirpación de la grasa aislada no se detectó sobre el tendón o las superficies articulares cambios macro o microscópicos. Cuando se extirpó además de la grada el tercio central del ligamento rotuliano, se observó adelgazamiento y elongación del tendón rotuliano con erosiones mínimas en la articulación femororotuliana en 4 rodillas examinadas. En ninguno de los dos grupos se observó neoformación de la grasa extirpada.The repercussion on the knee after partial excision of the Hoffa pad, isolated or in combination with the central portion of the patella tendon, was studied in 16 adult male rabbits, with a follow-up of 6 months. In the 6 surviving cases of isolated Hoffa pad excision, no changes were observed on the tendon neither the articular surfaces on macro and microscopic. In the 6 cases of Hoffa pa and central portion of the patella tendon excision, thinning and elongation of the tendon with some erosion of the articular surface of the femoropatellar joint was observed. The fat pad was nor regenerated in neither group

Virus satellites drive viral evolution and ecology

Virus satellites are widespread subcellular entities, present both in eukaryotic and in prokaryotic cells. Their modus vivendi involves parasitism of the life cycle of their inducing helper viruses, which assures their transmission to a new host. However, the evolutionary and ecological implications of satellites on helper viruses remain unclear. Here, using staphylococcal pathogenicity islands (SaPIs) as a model of virus satellites, we experimentally show that helper viruses rapidly evolve resistance to their virus satellites, preventing SaPI proliferation, and SaPIs in turn can readily evolve to overcome phage resistance. Genomic analyses of both these experimentally evolved strains as well as naturally occurring bacteriophages suggest that the SaPIs drive the coexistence of multiple alleles of the phage-coded SaPI inducing genes, as well as sometimes selecting for the absence of the SaPI depressing genes. We report similar (accidental) evolution of resistance to SaPIs in laboratory phages used for Staphylococcus aureus typing and also obtain the same qualitative results in both experimental evolution and phylogenetic studies of Enterococcus faecalis phages and their satellites viruses. In summary, our results suggest that helper and satellite viruses undergo rapid coevolution, which is likely to play a key role in the evolution and ecology of the viruses as well as their prokaryotic hosts

Patología escapulo-clavicular en un sujeto de Morella

X Congreso Nacional de Paleopatología. Univesidad Autónoma de Madrid, septiembre de 200

Reconstrucción del ligamento cruzado anterior por un abordaje trastendón rotuliano

Describimos la técnica de la plastia del ligamento cruzado anterior (LCA) usando el hueso-tendón-hueso a través de un abordaje transtendón rotuliano. Esto facilita la condiloplastia, la visión de los puntos de inserción del ligamento cruzado anterior y la realización de intervenciones asociadas con meniscectomía o suturas meniscales. Los resultados clínicos son semejantes a los de otras técnicas a cielo abierto o por atroscopia.The reconstruction of the anterior cruciate ligament by bone-tendon-bone through a transpatellar tendon approach facilitates notchplasty, allows visualization of the insertion points of the ligament, and the performance of other associated surgery like meniscectomy and meniscal sutures. The clinical results are similar to other techniques using arthrotomy or arthroscopy

Fault Diagnosis for Complex Systems Using Coloured Petri Nets

Non

Color fixation strategies on sustainable poly-butylene succinate using biobased itaconic acid

Biopo-lybutylene succinate (bioPBS) is gaining attention in the biodegradable polymer market due to its promising properties, such as high biodegradability and processing versatility, representing a potential sustainable replacement for fossil-based commodities. However, there is still a need to enhance its properties for certain applications, with aesthetical and mechanical properties being a challenge. The aim of the present work is to improve these properties by adding selected additives that will confer bioPBS with comparable properties to that of current counterparts such as polypropylene (PP) for specific applications in the automotive and household appliances sectors. A total of thirteen materials have been studied and compared, being twelve biocomposites containing combinations of three different additives: a commercial red colorant, itaconic acid (IA) to enhance color fixation and zirconia (ZrO2) nanoparticles to maintain at least native PBS mechanical properties. The results show that the combination of IA and the coloring agent tends to slightly yellowish the blend due to the absorbance spectra of IA and also to modify the gloss due to the formation of IA nanocrystals that affects light scattering. In addition, for low amounts of IA (4 wt %), Young’s Modulus seems to be kept while elongation at break is even raised. Unexpectedly, a strong aging affect was found after four weeks. IA increases the hydrophilic behavior of the samples and thus seems to accelerate the hydrolization of the matrix, which is accompanied by an accused disaggregation of phases and an overall softening and rigidization effect. The addition of low amounts of ZrO2 (2 wt %) seems to provide the desired effect for hardening the surface while almost not affecting the other properties; however, higher amounts tends to form aggregates saturating the compounds. As a conclusion, IA might be a good candidate for color fixing in biobased polymers

Musical preferences of Brazilian high school students

Music is considered a vital element in young people’s lives. It functions as an important means for expressing the emotions and feelings they experience in a daily basis. As such, this study explores the music preferences of high school Brazilian students (N = 940), 530 female (56.9%) and 410 male (43.1%) participants between 14 and 20 years old (M = 16.14 years old, SD = 1.22). The main instrument for data collection was the Questionnaire on Musical Style Preferences, which was adapted to the Brazilian context and encompassed 33 different music styles. A principal component analysis resulted in five dimensions representing different musical styles: (1) Intense, (2) Unique, (3) Sophisticated, (4) Contemporary, and (5) Mellow. The results of this study reinforced theory of the five-factor model of musical preference. Results also suggest that Mellow music was the most preferred while Sophisticated music was the least preferred among participants. Regarding gender, male participants showed a greater preference towards Contemporary, Intense, and Sophisticated music, whereas women generally preferred Mellow and Unique. Regarding age, participants under 20 years old showed a greater preference towards Mellow musical styles as compared to older participants. On the one hand, regression analyses showed that preferences towards Intense music decrease with age. On the other hand, gender was a better predictor for music preferences than age. Although the results of this study correspond to those of previous studies, more research studies are necessary to further explain musical preferences within the Brazilian contex

Patología traumática: estudio anatómico y paleopatológico de fracturas de miembros superiores e inferiores de la antigua población de Castielfabid (Rincón de Ademuz, Valencia)

X Congreso Nacional de Paleopatología. Univesidad Autónoma de Madrid, septiembre de 200