1,736 research outputs found
Wanted dead or alive : high diversity of macroinvertebrates associated with living and âdeadâ Posidonia oceanica matte
The Mediterranean endemic seagrass Posidonia
oceanica forms beds characterised by a dense leaf canopy
and a thick root-rhizome âmatteâ. Death of P. oceanica
shoots leads to exposure of the underlying matte, which
can persist for many years, and is termed âdeadâ matte.
Traditionally, dead matte has been regarded as a degraded
habitat. To test whether this assumption was
true, the motile macroinvertebrates of adjacent living
(with shoots) and dead (without shoots) matte of
P. oceanica were sampled in four different plots located
at the same depth (5â6 m) in Mellieha Bay, Malta
(central Mediterranean). The total number of species
and abundance were significantly higher (ANOVA;
P<0.05 and P<0.01, respectively) in the dead matte
than in living P. oceanica matte, despite the presence of
the foliar canopy in the latter. Multivariate analysis
(MDS) clearly showed two main groups of assemblages,
corresponding to the two matte types. The amphipods
Leptocheirus guttatus and Maera grossimana, and the
polychaete Nereis rava contributed most to the dissimilarity
between the two different matte types. Several
unique properties of the dead matte contributing to the
unexpected higher number of species and abundance of
motile macroinvertebrates associated with this habitat
are discussed. The findings have important implications
for the conservation of bare P. oceanica matte, which
has been generally viewed as a habitat of low ecological
value.peer-reviewe
MĂŠtodos para la identificaciĂłn del antĂgeno de histocompatibilidad HLA-B27: comparaciĂłn de cuatro protocolos tĂŠcnicos
IntroducciĂłn: La asociaciĂłn del HLA-B27 y las Espondiloartritis, ha hecho evidente que la tipificaciĂłn del HLA-B27 sea considerada como un apoyo en el diagnĂłstico de estas enfermedades. Los mĂŠtodos mĂĄs empleados para la determinaciĂłn del antĂgeno HLA-B27 en los laboratorios clĂnicos y en investigaciĂłn son: la microlinfocitotoxicidad (MCTX), la citometrĂa de flujo digital (CMFd), la citometrĂa de flujo anĂĄloga (CMFa) y la reacciĂłn en cadena de la polimerasa con primers de secuencia especĂficos (PCR-SSP).Objetivo: Comparar MCTX con la CMFd, la CMFa con la CMFd, y la tĂŠcnica de CMFd frente a PCR-SSP.MĂŠtodos para la identificaciĂłn del antĂgeno de histocompatibilidad hla-b27 MĂŠtodos: Se analizaron 4109 solicitudes de HLA-B27 en poblaciĂłn con manifestaciones sugestivas de EAS remitidas entre 2009 y 2012 al Hospital Militar Central y al Instituto de Referencia Andino. Se evaluaron las frecuencias obtenidas por Chi cuadrado (X2); para estimar la concordancia metodolĂłgica se utilizĂł el Coeficiente de CorrelaciĂłn Intraclase (CCI). Los anĂĄlisis se realizaron con el paquete estadĂstico SPSS V18.Resultados: Al evaluar 467 datos por la tĂŠcnica de CMFa frente a PCR-SSP, la CMFa mostrĂł 239 resultados entre positivos y en rango indeterminado, de los cuales, luego de ser confirmados PCRSSP, solo 213 demostraron la expresiĂłn de HLA-B27 (p<0.05). Se obtuvieron 208 resultados realizados por CMFd y PCR-SSP simultĂĄneamente, observĂĄndose una alta correspondencia entre estas tĂŠcnicas (p<0.05). Para evaluar la concordancia entre la MCTX y CMFd se analizaron 34 datos,revelando un 100% de correspondencia entre esta dos metodologĂas CCI=1,p<0.05).ConclusiĂłn: La citometrĂa de flujo digital es un mĂŠtodo rĂĄpido que presenta un desempeĂąo altamente confiable para la identificaciĂłn de HLA-B27, resultados que se recomiendan confirmar por PCR SSP
A motivational interview program for cardiac rehabilitation after acute myocardial infarction: study protocol of a randomized controlled trial in primary healthcare
Cardiac rehabilitation after acute myocardial infarction permits recovery of the heart function and enables secondary prevention programs in which changes in lifestyle habits are crucial. Cardiac rehabilitation often takes place in hospitals without coordination with primary healthcare and is not focused on individual patient preferences and goals, which is the core of the motivational interview. The objective of this study was to evaluate the efficacy of a cardiac rehabilitation program with a motivational interview in patients discharged from hospital after acute myocardial infarction.A randomized, non-pharmacological clinical trial in six primary healthcare centers in Barcelona (Spain) will assess whether a tailored cardiac rehabilitation program consisting of four motivational interviews and visits with family physicians, primary healthcare nurses and a cardiologist, coordinated with the reference hospital, results in better cardiac rehabilitation than standard care. A minimum sample of 284 participants requiring cardiac rehabilitation after acute myocardial infarction will be randomized to a cardiac rehabilitation group with a motivational interview program or to standard primary healthcare. The main outcome will be physical function measured by the six-minute walk test, and the secondary outcome will be the effectiveness of secondary prevention: a composite outcome comprising control of blood pressure, cholesterol, diabetes mellitus, smoking and body weight. Results will be evaluated at 1,3 and 6 months.This is the first clinical trial to study the impact of a new primary healthcare cardiac rehabilitation program with motivational interviews for patients discharged from hospital after myocardial infarction. Changes in lifestyles and habits after myocardial infarction are a core element of secondary prevention and require patient-centered care strategies such as motivational interviews. Therefore, this study could clarify the impact of this approach on health indicators, such as functional capacity.ClinicalTriasl.gov NCT05285969 registered on March 18, 2022.Š 2022. The Author(s)
Response of Quercus ilex seedlings to Phytophthora spp. root infection in a soil infestation test
[EN] Phytophthora species are the main agents associated with oak (Quercus spp.) decline, together with the changing environmental conditions and the intensive land use. The aim of this study was to evaluate the susceptibility of Quercus ilex to the inoculation with eight Phytophthora species. Seven to eight month old Q. ilex seedlings grown from acorns,
obtained from two Spanish origins, were inoculated with P. cinnamomi, P. cryptogea, P. gonapodyides, P. megasperma, P. nicotianae, P. plurivora, P. psychrophila and P. quercina. All Phytophthora inoculated seedlings showed decline and symptoms including small dark necrotic root lesions, root cankers, and loss of fine roots and tap root. The most aggressive species were P. cinnamomi, P. cryptogea, P. gonapodyides, P. plurivora and P. psychrophila followed by P. megasperma., while Phytophthora quercina and P. nicotianae were the less aggressive species. Results obtained confirm that these Phytophthora species could constituted a threat to Q. ilex ecosystems and the implications are further discussed.The authors are grateful to A. Solla and his team from the Centro Universitario de Plasencia-Universidad de Extremadura (Spain) for helping in the acorns collection and to the CIEF (Centro para la InvestigaciĂłn y ExperimentaciĂłn Forestal, Generalitat Valenciana, Valencia, Spain) for providing the acorns. This research was supported by funding from the project AGL2011- 30438-C02-01 (Ministerio de EconomĂa y Competitividad, Spain).Mora-Sala, B.; Abad Campos, P.; Berbegal Martinez, M. (2018). Response of Quercus ilex seedlings to Phytophthora spp. root infection in a soil infestation test. European Journal of Plant Pathology. https://doi.org/10.1007/s10658-018-01650-6SĂlvarez, L. A., PĂŠrez-Sierra, A., Armengol, J., & GarcĂa-JimĂŠnez, J. (2007). Characterization of Phytophthora nicotianae isolates causing collar and root rot of lavender and rosemary in Spain. Journal of Plant Pathology, 89, 261â264.Balci, Y., & Halmschlager, E. (2003a). 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Search for CP violation in D+âĎĎ+ and D+sâK0SĎ+ decays
A search for CP violation in D + â ĎĎ + decays is performed using data collected in 2011 by the LHCb experiment corresponding to an integrated luminosity of 1.0 fbâ1 at a centre of mass energy of 7 TeV. The CP -violating asymmetry is measured to be (â0.04 Âą 0.14 Âą 0.14)% for candidates with K â K + mass within 20 MeV/c 2 of the Ď meson mass. A search for a CP -violating asymmetry that varies across the Ď mass region of the D + â K â K + Ď + Dalitz plot is also performed, and no evidence for CP violation is found. In addition, the CP asymmetry in the D+sâK0SĎ+ decay is measured to be (0.61 Âą 0.83 Âą 0.14)%
Measurement of the relative rate of prompt Ďc0, Ďc1 and Ďc2 production at âs=7TeV
Prompt production of charmonium Ďc0, Ďc1 and Ďc2 mesons is studied using proton-proton collisions at the LHC at a centre-of-mass energy of âs=7TeV. The Ďc mesons are identified through their decay to J/ĎÎł, with J/ĎâÎź+muâ using photons that converted in the detector. A data sample, corresponding to an integrated luminosity of 1.0fbâ1 collected by the LHCb detector, is used to measure the relative prompt production rate of Ďc1 and Ďc2 in the rapidity range 2.0<y<4.5 as a function of the J/Ď transverse momentum from 3 to 20 GeV/c. First evidence for Ďc0 meson production at a hadron collider is also presented
Study of DJ meson decays to D+Ďâ, D0Ď+ and Dâ+Ďâ final states in pp collisions
A study of D+Ďâ, D0Ď+ and Dâ+Ďâ final states is performed using pp collision data, corresponding to an integrated luminosity of 1.0 fbâ1, collected at a centre-of-mass energy of 7 TeV with the LHCb detector. The D1(2420)0 resonance is observed in the Dâ+Ďâ final state and the Dâ2(2460) resonance is observed in the D+Ďâ, D0Ď+ and Dâ+Ďâ final states. For both resonances, their properties and spin-parity assignments are obtained. In addition, two natural parity and two unnatural parity resonances are observed in the mass region between 2500 and 2800 MeV. Further structures in the region around 3000 MeV are observed in all the Dâ+Ďâ, D+Ďâ and D0Ď+ final states
Searches for B0(s)âJ/ĎppË and B+âJ/ĎppËĎ+ decays
The results of searches for B0(s)âJ/Ď ppÂŻ and B + â J/Ď p pÂŻ Ď+ decays are reported. The analysis is based on a data sample, corresponding to an integrated luminosity of 1.0 fbâ1 of pp collisions, collected with the LHCb detector. An excess with 2.8 Ď significance is seen for the decay B0sâJ/Ď ppÂŻ and an upper limit on the branching fraction is set at the 90 % confidence level: B(B0sâJ/Ď ppÂŻ) < 4.8 Ă 10â6, which is the first such limit. No significant signals are seen for B0 â J/Ď ppÂŻ and B+ â J/Ď ppÂŻ Ď + decays, for which the corresponding limits are set: B(B0âJ/Ď ppÂŻ) < 5.2 Ă 10â7, which significantly improves the existing limit; and B(B+âJ/Ď ppÂŻĎ+) < 5.0 Ă 10â7, which is the first limit on this branching fraction
Observation of associated near-side and away-side long-range correlations in âsNN=5.02ââTeV proton-lead collisions with the ATLAS detector
Two-particle correlations in relative azimuthal angle (ÎĎ) and pseudorapidity (ÎΡ) are measured in âsNN=5.02ââTeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1ââÎźb-1 of data as a function of transverse momentum (pT) and the transverse energy (ÎŁETPb) summed over 3.1<Ρ<4.9 in the direction of the Pb beam. The correlation function, constructed from charged particles, exhibits a long-range (2<|ÎΡ|<5) ânear-sideâ (ÎĎâź0) correlation that grows rapidly with increasing ÎŁETPb. A long-range âaway-sideâ (ÎĎâźĎ) correlation, obtained by subtracting the expected contributions from recoiling dijets and other sources estimated using events with small ÎŁETPb, is found to match the near-side correlation in magnitude, shape (in ÎΡ and ÎĎ) and ÎŁETPb dependence. The resultant ÎĎ correlation is approximately symmetric about Ď/2, and is consistent with a dominant cosâĄ2ÎĎ modulation for all ÎŁETPb ranges and particle pT
Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in âs = 7 TeV pp collisions with the ATLAS detector
A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fbâ1 of protonâproton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results
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