2,187 research outputs found
Anomalía congénita del atlas asociada con fractura de la apófisis espinosa de C-7 : a propósito de 1 caso
Se presenta 1 paciente con un defecto congenita del arco posterior del atlas asociado
con una fractura de la apólisis espinosa de C-7. La TAC, precedida de una correcta evaluación
clínica, permiten diferenciar los traumatismos agudos de las anomalías congénitas en el atlas.A case of a congenital cleft of the posterior arch of the atlas associated with a fracture
of the spinous process of C-7 is reported. Appropiate clinical evaluation and CT-scan study
allow to differentiate acute trauma from a congenital abnormality in the atlas
Prostatic cyst: An unusual cause of hemospermia
AbstractA 31-year-old man was referred to our service because of recurrent hemospermia over the last 4 years, there were no other symptoms like perineal pain, fever, dysuria, nocturia or urgency; this patient only presented hemospermia with clots. Genital examination was normal. Semen analysis showed no change in volume and pH; however, hemospermia and asthenozoospermia were observed. The semen culture was normal. Ultrasonography only revealed the presence of a cystic lesion adjoining the prostate gland, next to the bladder neck. The retrograde urethrogram was normal. The CT scan revealed only a small calcification in the right seminal vesicle. Endoscopic cistourethroscopy demonstrated 2 cystic dilatations arising on both sides of the prostate gland adjacent to the bladder neck, behind the verumontanum with vessels running over the surface prostatic cyst dilatation. The diagnosis of prostatic gland cystic dilatation was reached and confirmed by pathology that reported fibroconnective tissue with fibrosis and hyalinization. Transurethral unroofing of the cyst was performed separately with a successful outcome
Dispersión de rayos X aplicado al análisis de nanotubos de carbono, polímeros y nanocompuestos
[EN] In this review we will show that wide and small angle X-ray scattering techniques (WAXS and
SAXS respectively) can be a valuable tool to characterize the structure of carbon nanotubes
(CNT) and related CNT-polymer nanocomposites at different characteristic length scales.
Ranging from single carbon nanotubes to aggregates of CNTs X-ray scattering may offer
structural information which can be crucial in order to design new materials based on carbon
nanotubes.[ES] En este trabajo de revisión mostramos que las técnicas de dispersión de rayos X a alto y bajo
ángulo (WAXS y SAXS respectivamente) pueden ser una herramienta muy valiosa para
caracterizar la estructura de nanotubos de carbono (CNT) y nanocompuestos CNT-polímero, en
diferentes escalas de longitud. La dispersión de rayos X puede ofrecer información estructural en
el rango desde nanotubos de carbono aislados, hasta agregados de CNT. Dicha información puede
ser crucial de cara a diseñar materiales basados en nanotubos de carbono.The authors thank the financial support from the
MCYT (grant MAT2005-01768), Spain. The help of
G. Broza, Z. Roslaniec, K. Schulte, I. Sics, B. H.
Hsiao, S. S. Funari in different parts of this work is
gratefully acknowledge. M. C. G.-G. and A. N. are
also grateful to the Ramón y Cajal Program for the
support of this reserach.Peer reviewe
The use of banquettes of Posidonia oceanica as a source of fiber and minerals in ruminant nutrition. An observational study
In the search for new food sources that contribute to the optimization of livestock production this paper discusses the possibility of using waste (called banquettes) of a marine plant commonly found on the Mediterranean coasts: Posidonia oceanica. The idea stems from the use of a waste that in summertime generates large costs because it is considered bothersome on the beaches. Thus, tons and tons of residues are collected each year from the beach, being destined for incineration. However, alternative uses for these residues are suggested, such as forage that is particularly relevant for the Mediterranean coast, where the weather does not support abundant grass growth. With this purpose, samples of banquettes of P. oceanica from six different points of a touristic place located in the Murcia Region (S.E. of Spain) were collected in April 2012 on the same day directly from the beach above the water line, washed with distilled water and sun-dried for 48 h. Approximately 500 g of each sample of plant material was chopped and two subsamples of 200 g each were placed in airtight plastic containers and sent to the laboratory for mineral and chemical analysis. This report provides data on the nutritional composition of P. oceanica such as mineral contents (As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) and chemical composition (ash, CP, ether extract (EE), NDF and ADF, respectively) and ADL. Finally, the in sacco rumen disappearance of dry matter (DM), organic matter (OM), CP and NDF were studied. Our results showed that minerals, except for Fe, where within the range of values reported for P. oceanica in other parts of the Mediterranean region. Given the high Fe content further studies assessing the antagonic Fe–Cu interaction and its effect on animal health should be addressed. In relation to chemical composition, it is clear that this seagrass is a poor protein source and has levels of DM degradability at 24 h, similar to those obtained for cereal straw. The information summarized here shows some potential for the use of banquettes of P. oceanica as forage source in ruminant nutritionFunds for thefinancial support received for carryingout this work, through the project: Subproductos marinos ennutrición animal: utilidad de los arribazones deP. oceanicacomo fuente defibra en ganado caprino de leche (Ref. 15.271)S
Musicoterapia en una Unidad de Cuidados Intensivos Neonatales: experiencia benéfica para el binomio
ResumenIntroducciónDesde hace varios años se está utilizando la música como herramienta terapéutica y preventiva en la neonatología, se han documentado en un gran número de artículos de investigación, sin embargo, en México esta técnica es poco utilizada.ObjetivoMejorar las condiciones de los neonatos atendidos en una Unidad de Cuidados Intensivos (UCIN) y sus familiares, mediante el uso de musicoterapia, para minimizar el estrés y los daños colaterales.Materiales y métodosUn grupo de 2 neonatólogos, 3 residentes de pediatría, 10 enfermeras y un concertista profesional de violín, llevaron a cabo 6 sesiones musicales semanales en la Unidad de Cuidados Intensivos Neonatales Externos del Hospital Civil de Guadalajara. Durante el concierto se valoró individualmente a cada neonato, registrando los signos vitales por monitorización electrónica, además se registró el estado anímico de los familiares.ResultadosDurante las sesiones de música los neonatales no presentaron cambios significativos en sus constantes vitales, en el personal de la UCIN y en los padres de recién nacidos hospitalizados se vieron efectos benéficos, refiriendo disminución del estrés y altos índices de satisfacción.ConclusionesLa música puede tener un efecto positivo como terapia coadyuvante en neonatos de alto riesgo, principalmente en prematuros. Se recomienda difundir y aplicar esta metodología en las UCIN del país.AbstractIntroductionSince several years ago, music has been used as a therapeutic and preventive tool in neonatology. A great number of research papers have been written on the subject; however, this technique is rarely used in Mexico.ObjectiveTo improve the condition of neonates at Neonatal Intensive Care Units (NICU) and their relatives, in order to minimize any stress and collateral damage.Material and methods: A group of two neonatologists, 3 residents, 10 nurses and a professional concert violinist, conducted six weekly music sessions in the Outpatient Neonatal Intensive Care Unit (ONICU) of our institution. During the concert, we individually assessed each newborn, recording vital signs through electronic monitoring; additionally, we recorded the mood of any other family members present.ResultsDuring the music sessions, the neonatal patients showed no significant changes in vital signs; yet, ONICU staff and the parents/relatives of hospitalized newborns showed beneficial effects, reporting decreased stress and high levels of satisfaction.ConclusionsMusic can have a positive effect as adjunctive therapy in high-risk newborns, especially in premature babies. We therefore recommend applying this methodology in the ONICU
Correction: Drivers of deforestation in the basin of the Usumacinta River: Inference on process from pattern analysis using generalised additive models.
[This corrects the article DOI: 10.1371/journal.pone.0222908.]
Limits on the Electromagnetic and Weak Dipole Moments of the Tau-Lepton in E_6 Superstring Models
We obtain limits on the electromagnetic and weak dipole moments of the
tau-lepton in the framework of a Left-Right symmetric model (LRSM) and a class
of inspired models with an additional neutral vector boson .
Using as an input the data obtained by the L3 and OPAL Collaborations for the
reaction , we get a stringent limit on the LRSM
mixing angle , , which in
turn induces bounds on the tau weak dipole moments which are consistent with
the bounds obtained recently by the DELPHI and ALEPH Collaborations from the
reaction . We also get similar bounds for the weak
dipole moments of the tau lepton in the framework of superstring models.Comment: 18 pages, 5 figure
Bounds on the dipole moments of the tau-neutrino via the process in a 331 model
We obtain limits on the anomalous magnetic and electric dipole moments of the
through the reaction
and in the framework of a 331 model. We consider initial-state radiation, and
neglect and photon exchange diagrams. The results are based on the data
reported by the L3 Collaboration at LEP, and compare favorably with the limits
obtained in other models, complementing previous studies on the dipole moments.Comment: 13 pages, 4 figures, to be published in The European Physical J C.
arXiv admin note: substantial text overlap with arXiv:hep-ph/060527
Sheet failure prediction during forming of advanced high strength steels
The automotive industry has increased significantly the use of advanced high strength
steels (AHSS) in many structural components of vehicles, with the aim to reduce weight and also increase
safety. The high resistance of these steels is accompanied by a decrease in formability, which makes
simulation a requirement to adequately foresee the formability of a stretch formed component. For sheet
metal forming, the conventional diagram based in strains, Forming Limit Diagrams (FLD), is often used as a
failure criterion, but this approach is not effective when working with AHSS, due to the bigger effect
produced by changes on strain paths than conventional steels. This work proposes the use a Forming Limit
Stress Diagram (FLSD) based on the main stresses acting on the material. These FLSD has been obtained by
the simulation of stretching test. To improve the results, the tensile test curve has been extended by using an
optical measuring system and a subsequent adjustment of the stress-strain curve for the material. Finally,
simulations and real parts behavior have been compared and the failure predictions models have been
discussed.Postprint (published version
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