2,195 research outputs found
Dynamical polaron Ansatz: A theoretical tool for the ultrastrong-coupling regime of circuit QED
13 págs.; 5 figs.In this work we develop a semianalytical variational Ansatz to study the properties of few-photon excitations interacting with a collection of quantum emitters in regimes that go beyond the rotating-wave approximation. This method can be used to approximate both the static and dynamical properties of a superconducting qubit in an open transmission line, including the spontaneous emission spectrum and the resonances in scattering experiments. The approximations are quantitatively accurate for rather strong couplings, as shown by a direct comparison to matrix-product-state numerical methods, and provide also a good qualitative description for stronger couplings well beyond the Markovian regime. ©2016 American Physical SocietyThe authors acknowledge support from Spanish Mineco
Project No. FIS2012-33022, CAM Research Network
QUITEMAD+, and EU FP7 FET Open project PROMISCE.Peer Reviewe
Some ecological aspects of free-living Haemaphysalis juxtakochi Cooley, 1946 (Acari: Ixodidae) in Panama
Objective. To describe the seasonal variation and perform a comparative analysis on habitat
preference of Haemaphysalis juxtakochi in Panama. Materials and methods. Ticks were collected
from the vegetation, using a white cloth, between January 2009 and March 2010, in four site located
in Summit Municipal Park (SMP), two in wooded area (WA) and two in grasslands (GR).The ticks were
determined as larvae, nymphs and adults of H. juxtakochi. The number of ticks collected in each
area was employed to describe the seasonal distribution of both immature and adult stages, and the
non-parametric Mann-Whitney U test. Results. A total of 2.338 ticks in WA and 560 ticks in GR were
collected. The major peak of adults from May to July, nymphs peaked from January to April and the
peak of larvae abundance from December and January. There was a significant difference in the number
of ticks collected in the two areas for each tick stage (larvae, mean number (MN) in WA 120.14, MN
in GR 57.07, P: 0.02; nymphs, MN in WA 46.42, MN in GR 16.38, P: 0.018; adults, MN in WA 6.64,
MN in GR 1.78, P: 0.02). Conclusions. The results suggest that H. juxtakochi maintains a one-year
cycle in the study areas. This cycle would be characterized by the immature population peaks in the
dry season; while adults are distributed throughout year, with a peak in the transition from the rainy
and dry. Moreover, H. juxtakochi was more abundant in forests than in grasslands, which could lead
to a better adaptation to forested conditions.Objetivo. Describir la variación estacional y realizar un análisis comparativo de la preferencia de
hábitat de H. juxtakochi en Panamá. Materiales y métodos. Se recolectaron mensualmente garrapatas
de la vegetación utilizando una tela blanca, entre enero de 2009 y marzo de 2010 en cuatro sitios
establecidos en el Parque Municipal Summit (PMS), dos en área de pastizales (AP) y dos en área
boscosa (AB). Las garrapatas fueron identificadas como larva, ninfa y adulto de H. juxtakochi. El
Some ecological aspects of free-living Haemaphysalis
juxtakochi Cooley, 1946 (Acari: Ixodidae) in Panama
Algunos aspectos ecológicos de fases de vida libre de
Haemaphysalis juxtakochi Cooley, 1946 (Acari: Ixodidae)
en Panamá
Gleydis García G,1 Lic, Angélica Castro DF,1 Lic, Sergio Bermúdez C,1* M.Sc,
Santiago Nava,2 Ph.D.
1Instituto Conmemorativo Gorgas de Estudios de la Salud, Ciudad de Panamá, Panamá 0816-
02593. 2Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Agropecuaria Rafaela
y Consejo Nacional de Investigaciones Científicas y Técnicas, CC 22, CP 2300 Rafaela, Santa Fe,
Argentina. *Correspondencia: [email protected]
Received: February 2013; Accepted: November 2013.
ORIGINAL
Rev.MVZ Córdoba 19(1):3984-3989, 2014. ISSN: 0122-0268
3985
número de garrapatas recolectadas en cada área fue empleado para describir la distribución estacional
de ambos estadios inmaduros y adultos, y se compararon con la prueba no paramétrica Mann-Whitney
U. Resultados. Se recolectó un total de 2.338 garrapatas en AP y 560 garrapatas en AB. El mayor
pico de garrapatas adultas fue de mayo hasta julio, los picos de ninfas fueron de enero hasta abril
y los picos de abundancia de larvas desde diciembre hasta enero. Hubo diferencias significativas
en el número de garrapatas recolectadas en las dos áreas para cada estadio (número promedio de
larvas en AB 120.14, en AP 57.07, P: 0.02; número promedio de ninfas en AB 46.42, en AP 16.38,
P:0.018; número promedio de adultos en AB 6.64, en AP 1.78, P: 0.02). Conclusiones. Los resultados
sugieren que H. juxtakochi mantiene un ciclo de un año en las áreas de estudio. Este ciclo estaría
caracterizado por picos poblacionales de ejemplares inmaduros en la época seca; mientras que los
adultos se distribuyen a lo largo de todo año, con un pico en la transición entre la época lluviosa y
seca. Por otra parte, H. juxtakochi fue más abundante en bosques que en pastizales, lo cual podría
suponer mejores adaptaciones a condiciones boscosas.Fil: García G., Gleydis. Instituto Conmemorativo Gorgas de Estudios de la Salud; PanamáFil: Castro D.F., Angélica. Instituto Conmemorativo Gorgas de Estudios de la Salud; PanamáFil: Bermúdez Castillero, Sergio Eduardo. Instituto Conmemorativo Gorgas de Estudios de la Salud; PanamáFil: Nava, Santiago. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
The Role of Probiotics and Prebiotics in the Prevention and Treatment of Obesity
Obesity is a global pandemic complex to treat due to its multifactorial pathogenesis—an
unhealthy lifestyle, neuronal and hormonal mechanisms, and genetic and epigenetic factors are
involved. Scientific evidence supports the idea that obesity and metabolic consequences are strongly
related to changes in both the function and composition of gut microbiota, which exert an essential role
in modulating energy metabolism. Modifications of gut microbiota composition have been associated
with variations in body weight and body mass index. Lifestyle modifications remain as primary
therapy for obesity and related metabolic disorders. New therapeutic strategies to treat/prevent
obesity have been proposed, based on pre- and/or probiotic modulation of gut microbiota to mimic
that found in healthy non-obese subjects. Based on human and animal studies, this review aimed
to discuss mechanisms through which gut microbiota could act as a key modifier of obesity and
related metabolic complications. Evidence from animal studies and human clinical trials suggesting
potential beneficial effects of prebiotic and various probiotic strains on those physical, biochemical,
and metabolic parameters related to obesity is presented. As a conclusion, a deeper knowledge
about pre-/probiotic mechanisms of action, in combination with adequately powered, randomized
controlled follow-up studies, will facilitate the clinical application and development of personalized
healthcare strategies.Supported by funds from European Union 7th FP KBBE.2013.2.2-02—MyNewGut Project (“Factors
influencing the human gut microbiome and its effect on the development of diet-related diseases and brain
development”, Grant Agreement 613979) and from Spanish Ministry of Economy and Competitiveness GD-Brain
Projects (SAF2015-69265-c2.2)
Some ecological aspects of free-living Haemaphysalis juxtakochi Cooley, 1946 (Acari: Ixodidae) in Panama
ABSTRACT
Objective. To describe the seasonal variation and perform a comparative analysis on habitat preference of Haemaphysalis juxtakochi in Panama. Materials and methods. Ticks were collected from the vegetation, using a white cloth, between January 2009 and March 2010, in four site located in Summit Municipal Park (SMP), two in wooded area (WA) and two in grasslands (GR).The ticks were determined as larvae, nymphs and adults of H. juxtakochi. The number of ticks collected in each area was employed to describe the seasonal distribution of both immature and adult stages, and the non-parametric Mann-Whitney U test. Results. A total of 2.338 ticks in WA and 560 ticks in GR were collected. The major peak of adults from May to July, nymphs peaked from January to April and the peak of larvae abundance from December and January. There was a significant difference in the number of ticks collected in the two areas for each tick stage (larvae, mean number (MN) in WA 120.14, MN in GR 57.07, P: 0.02; nymphs, MN in WA 46.42, MN in GR 16.38, P: 0.018; adults, MN in WA 6.64, MN in GR 1.78, P: 0.02). Conclusions. The results suggest that H. juxtakochi maintains a one-year cycle in the study areas. This cycle would be characterized by the immature population peaks in the dry season; while adults are distributed throughout year, with a peak in the transition from the rainy and dry. Moreover, H. juxtakochi was more abundant in forests than in grasslands, which could lead to a better adaptation to forested conditions
Neutron-proton interaction in rare-earth nuclei: Role of tensor force
We investigate the role of the tensor force in the description of doubly odd
deformed nuclei within the framework of the particle-rotor model. We study the
rare-earth nuclei 174Lu, 180Ta, 182Ta, and 188Re using a finite-range
interaction, with and without tensor terms. Attention is focused on the lowest
K=0 and K=1 bands, where the effects of the residual neutron-proton interaction
are particularly evident. Comparison of the calculated results with
experimental data evidences the importance of the tensor-force effects.Comment: 8 pages, 5 figures, to be published on Physical Review
CATASTROPHIC MUSCULOSKELETAL INJURIES IN THOROUGHBRED HORSES, CARACAS-VENEZUELA
Se hizo un estudio clínico-patológico de las lesiones músculo-esqueléticas catastróficas ocurridas en pruebas públicas en el Hipódromo “La Rinconada”, Caracas, Venezuela, entre el 2000 al 2007. Se trabajó con 78 equinos Pura Sangre de Carrera con lesiones del aparato locomotor. Se colectó muestras de sangre para estudio hematológico, bioquímico y hormonal (paratohormona), así como muestras de orina para determinar niveles de fosfatos. Se les practicó la eutanasia debido a la severidad de las lesiones y se realizó la necropsia. Se tomó secciones de tejido óseo para determinación de calcio y fósforo, y de tejido muscular, tendinoso, gástrico, renal y hepático para estudio histológico. Los exámenes clínicos revelaron claudicación grado IV-V en todos los animales. La pérdida de continuidad ósea (fracturas) ocurrió en todos los casos, y exposición de estructuras óseas, articulares, rupturas de tendones, ligamentos y compromiso vascular en el 60%. Las fracturas fueron de tipo multifragmentaria (60%), oblicua (25%) y espiral (15%). Los valores sanguíneos y de orina estuvieron afectados. En la necropsia se observó el síndrome ulceroso gástrico equino, congestión hepática y necrosis tubular aguda renal. El análisis histológico reveló gastritis aguda superficial severa, úlceras gástricas, necrosis periacinar hepática, osteomalacia y necrosis del hueso subcondral, condromalacia y capsulitis severa.A clinical and pathological study was conducted on musculoskeletal catastrophic lesions of the locomotive apparatus occurred in 78 Thoroughbred horses in the racetrack «La Rinconada», Caracas, Venezuela, during 2000 to 2007. Blood samples were collected for hematological, biochemical and parathormone analysis in blood. Also, urine samples for phosphate levels. All animals were euthanized due to severe lesions, and bone, tendons, stomach, kidney and liver samples were taken for by histopathology evaluation. Clinical exams revealed lameness grade IV-V in all animals. Losses of bone continuity (fracture) occurred in all cases, and exposition of bone structures, joint damage, rupture of tendons and ligaments and vascular destruction were observed in 60% of them. The types of fractures were comminuted (60%), oblique (25%) and spiral (15%). Blood and urine values were affected. Necropsy showed equine gastric ulcer syndrome, liver congestion and renal acute tubular necrosis. Histopathological analysis showed acute and severe gastritis, gastric ulcers, hepatic periacinar necrosis, osteomalacia and necrosis in subchondral bone, chondromalacia and severe capsulitis
LESIONES GÁSTRICAS, HEPÁTICAS Y RENALES EN EL SÍNDROME DE ÚLCERAS GÁSTRICAS EN EQUINOS PURA SANGRE DE CARRERA.
The aim of this study was to describe gastric, hepatic, and renal lesions inThoroughbred Racing horses associated to the equine gastric ulcer syndrome. Thirtyhorses with a history of gastric ulcer syndrome and recurrent colic during 2006 to 2007 atthe Race Track «La Rinconada», Caracas, Venezuela were evaluated. Horses were euthanized and the necropsy was conducted. Tissue samples were collected from stomach,liver and kidney, and processed by conventional histological methods. In the stomach,the mucosa was intact but areas of hyperaemia and hyperkeratosis were observed in 6cases, multifocal small erosions or ulcers in 6 cases, multifocal large ulcers with areas ofextensive erosion in 12 cases and extensive areas of ulceration with exposure of thesubmucosa in 6 cases. The macroscopic evaluation of the liver showed evidenthepatomegaly in 22 cases and lobular pattern in 18 cases. The kidneys showed severecongestion in all cases, loss of cortico-medullar ratio in 20 cases, cortical necrosis in 18cases, acute tubular necrosis in all cases, papillary necrosis in 6 cases, and adherence ofthe capsule with interstitial fibroplasia in 4 cases. Lesions in the gastric mucosa, liver andkidney were associated with extended treatment with non-steroidal anti-inflammatorydrugsEl objetivo del estudio fue describir lesiones gástricas, hepáticas y renales en caballos Pura Sangre de Carreras enmarcadas en el síndrome ulceroso gástrico equino. Se trabajó con 30 ejemplares Pura Sangre de Carrera con historia de síndrome ulceroso gástrico y cólico recurrentes entre 2006 y 2007, en el Hipódromo «La Rinconada», Caracas, Venezuela. A los animales se les practicó la eutanasia y se colectó nuestras de tejido gástrico, hepático y renal. Las muestras fueron procesadas por los métodos histológicos convencionales. En el estómago se observó mucosa intacta, pero con áreas de hiperemia y/o hiperqueratosis en 6 casos, pequeñas erosiones multifocales o úlceras en 30 casos, úlceras grandes multifocales con regiones extensas de erosión en 12 casos, y úlceras extensivas con áreas de exposición de la submucosa en 6 casos. La evaluación macroscópica del hígado evidenció icteria en 22 casos, así como hepatomegalia y patrón lobulillar en 18 casos. Los riñones mostraron congestión severa en todos los casos, pérdida de la relación córtico medular en 20 casos, necrosis cortical 18 casos, necrosis tubular aguda en todos los casos, necrosis papilar confluente en 6 casos y adherencia de la cápsula con fibroplasia intersticial en 4 casos. Las lesiones observadas en la mucosa gástrica, hígado y riñón estuvieron asociadas con terapéuticas prolongadas con antiinflamatorios no esteroideos
Cortical Visual Evoked Potentials and Growth in Infants Fed with Bioactive Compounds-Enriched Infant Formula: Results from COGNIS Randomized Clinical Trial
Postnatal nutrition is essential for growth and neurodevelopment. We analyzed the
influence of a new enriched-infant formula with bioactive compounds on growth, neurodevelopment,
and visual function (VF) in healthy infants during their first 18 months of life. A total of 170 infants
were randomized in the COGNIS randomized clinical trial (RCT) to receive a standard infant formula
(SF = 85) or a new experimental infant formula supplemented with functional nutrients (EF = 85). As a
control, 50 breastfed infants (BF) were enrolled. Growth patterns were evaluated up to 18 months of
life; neurodevelopment was assessed by general movements at 2, 3, and 4 months; VF was measured by
cortical visual evoked potentials at 3 and 12 months. No differences in growth and neurodevelopment
were found between groups. Regarding VF, SF and EF infants presented prolonged latencies and
lower amplitudes in the P100 wave than BF infants. In the EF group, a higher percentage of infants
presented response at 7 1/2' of arc at 12 months compared to 3 months of age; a similar proportion of BF
and EF infants presented responses at 7 1/2' of arc at 12 months of age. Early nutritional intervention
with bioactive compounds could narrow the gap in growth and neurodevelopment between breastfed
and formula-fed infants.This project has been funded by Ordesa Laboratories, S.L. Contract University of Granada General
Foundation, No. 3349 and SMARTFOODS (CIEN) Contract University of Granada General Foundation, No.
4003, Spanish Ministry of Economy, Industry and Competitiveness; funded in part by HORIZON 2020 EU
DynaHEALTH Project (GA No.633595)
Ballistic Localization in Quasi-1D Waveguides with Rough Surfaces
Structure of eigenstates in a periodic quasi-1D waveguide with a rough
surface is studied both analytically and numerically. We have found a large
number of "regular" eigenstates for any high energy. They result in a very slow
convergence to the classical limit in which the eigenstates are expected to be
completely ergodic. As a consequence, localization properties of eigenstates
originated from unperturbed transverse channels with low indexes, are strongly
localized (delocalized) in the momentum (coordinate) representation. These
eigenstates were found to have a quite unexpeted form that manifests a kind of
"repulsion" from the rough surface. Our results indicate that standard
statistical approaches for ballistic localization in such waveguides seem to be
unappropriate.Comment: 5 pages, 4 figure
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