307 research outputs found
BLOOD BIOCHEMICAL PROFILE IN DOGS AND CATS UNDER DIFFERENT FEEDING DIETS
Foram determinados os parâmetros de bioquímica sanguínea em 50 cães e 25 gatos
sadios submetidos a três regimes alimentares: ração comercial, comida caseira e alimentação mista
(ração e caseira). Os cães e os gatos alimentados com regime misto apresentaram níveis sanguíneos
elevados de glicose e de colesterol, sugerindo um consumo de alimentos calóricos acima dos
requerimentos e um maior risco de obesidade. A ingestão de proteínas na alimentação caseira
parece ser restrita, considerando-se as baixas concentrações de albumina e/ou uréia sanguíneas
nos cães e nos gatos. Baixos teores de cálcio foram encontrados nos cães de alimentação não
concentrada. Os gatos com alimentação caseira podem estar consumindo quantidades baixas de
minerais revelado pelos menores teores sanguíneos de cálcio, fósforo e magnésio.
Abstract
The aim of the present work was to carry out a study on the variation of the blood
chemistry constituents of dogs and cats subjected to different feeding diets. Blood samples from
50 healthy dogs and 25 cats were used to study the effect of feeding diets with commercial ration,
homemade or mixed (concentrate and homemade) on their blood biochemical profile. Both, dogs
and cats, fed with mixed rations showed higher glucose and cholesterol blood levels, which could be
suggestive of a high caloric intake and a risk of obesity. Intake of proteins in animals with homemade
feed seems to be low considering concentrations of plasma albumin and/or urea in dogs and cats.
Low levels of calcium were found in dogs with non-concentrated feed. Cats with homemade feed
could have low intake of minerals considering the lower levels of calcium, phosphorus and magnesium
observed
PRM76 Stated time-allocation, adherence, and health-outcome tradeoff preferences in cystic fibrosis households
Radiative leptogenesis in minimal seesaw models
In the framework of seesaw models with only two heavy Majorana neutrinos,
nonzero leptonic asymmetries can be radiatively generated when exact heavy
neutrino mass degeneracy () is imposed at a scale .
For a specific case, we show that an acceptable value for the baryon asymmetry
of the Universe can be obtained considering thermal leptogenesis.Comment: Talk given at NOW 2004: Neutrino Oscillation Workshop, Conca
Specchiulla, Otranto, Italy, 11-17 Sep 200
Enlarging the window for radiative leptogenesis
We investigate the scenario of resonant thermal leptogenesis, in which the
leptonic asymmetries are generated through renormalization group corrections
induced at the leptogenesis scale. In the framework of the standard model
extended by three right-handed heavy Majorana neutrinos with masses M1 = M2 <<
M3 at some high scale, we show that the mass splitting and CP-violating effects
induced by renormalization group corrections can lead to values of the CP
asymmetries large enough for a successful leptogenesis. In this scenario, the
low-energy neutrino oscillation data can also be easily accommodated. The
possibility of having an underlying symmetry behind the degeneracy in the
right-handed neutrino mass spectrum is also discussed.Comment: 20 pages, 2 figures, final version to appear in Phys. Lett.
Removing Ambiguities in the Neutrino Mass Matrix
We suggest that the weak-basis independent condition det(M_nu)=0 for the
effective neutrino mass matrix can be used in order to remove the ambiguities
in the reconstruction of the neutrino mass matrix from input data available
from present and future feasible experiments. In this framework, we study the
full reconstruction of M_nu with special emphasis on the correlation between
the Majorana CP-violating phase and the various mixing angles. The impact of
the recent KamLAND results on the effective neutrino mass parameter is also
briefly discussed.Comment: 11 pages, 4 figures. Comments and references added; final version to
appear in Phys. Lett.
Magnetic detection of sentinel lymph node in papillary thyroid carcinoma: The MAGIC-PAT study results
Introduction: Despite the controversy concerning sentinel lymph node biopsy (SLNB) in papillary thyroid carcinoma (PTC), successful detection rates can be achieved by radioguidance and vital dyeing. However, the drawbacks in both techniques are notable. Magnetic-guided SLNB (mSLNB) using superparamagnetic iron oxide (SPIO) nanoparticles is appealing as an alternative procedure.
Materials and Methods: mSLNB using the Sentimag-Sienna System ® , total thyroidectomy and central compartment dissection (CCD) were performed on all PTC patients. Lymph node involvement was assessed by postoperative pathological examination.
Results: From 2014 to 2016, 33 consecutive patients with PTC were enrolled in the study. A total of 20 patients met the eligibility. mSLNB succeeded in 16 patients, with a detection rate of 80%. A median of two SLN per patient were detected. A median of 10.5 non-sentinel lymph nodes (NSLN) from CCD were examined. Among the patients, 56.25% (9/16) had no metastatic nodes, while 12.5% (2/16) had exclusively SLN involvement. No false negative cases were found. The agreement between SLN and NSLN status was 87.5%. The prediction of NSLN involvement by SLN status showed 100% sensitivity, 81.8% specificity, 71.4% PPV and 100% NPV. Subsequently, mSLNB and the final pathological analysis would discriminate 43.75% (7/16) of patients who would certainly benefit from CCD whilst 56.25% of the total would confirm an unnecessary lymphadenectomy and avoid morbidity.
Conclusion: mSLNB showed satisfactory performance in PTC with clinical-negative nodes. We have shown mSLNB to be a good predictor of central compartment status that can improve the staging and management of PTC patients
The braid groups of the projective plane and the Fadell-Neuwirth short exact sequence
International audienceWe study the pure braid groups of the real projective plane , and in particular the possible splitting of the Fadell-Neuwirth short exact sequence , where and , and is the homomorphism which corresponds geometrically to forgetting the last strings. This problem is equivalent to that of the existence of a section for the associated fibration of configuration spaces. Van Buskirk proved in 1966 that and admit a section if and . Our main result in this paper is to prove that there is no section if . As a corollary, it follows that and are the only values for which a section exists. As part of the proof, we derive a presentation of : this appears to be the first time that such a presentation has been given in the literature
Leptogenesis, CP violation and neutrino data: What can we learn?
A detailed analytic and numerical study of baryogenesis through leptogenesis
is performed in the framework of the standard model of electroweak interactions
extended by the addition of three right-handed neutrinos, leading to the seesaw
mechanism. We analyze the connection between GUT-motivated relations for the
quark and lepton mass matrices and the possibility of obtaining a viable
leptogenesis scenario. In particular, we analyze whether the constraints
imposed by SO(10) GUTs can be compatible with all the available solar,
atmospheric and reactor neutrino data and, simultaneously, be capable of
producing the required baryon asymmetry via the leptogenesis mechanism. It is
found that the Just-So^2 and SMA solar solutions lead to a viable leptogenesis
even for the simplest SO(10) GUT, while the LMA, LOW and VO solar solutions
would require a different hierarchy for the Dirac neutrino masses in order to
generate the observed baryon asymmetry. Some implications on CP violation at
low energies and on neutrinoless double beta decay are also considered.Comment: 36 pages, 6 figures; new references added, final version to appear in
Nucl. Phys.
Chern-Simons production during preheating in hybrid inflation models
We study the onset of symmetry breaking after hybrid inflation in a model
having the field content of the SU(2) gauge-scalar sector of the standard
model, coupled to a singlet inflaton. This process is studied in
(3+1)-dimensions in a fully non-perturbative way with the help of lattice
techniques within the classical approximation. We focus on the role played by
gauge fields and, in particular, on the generation of Chern-Simons number. Our
results are shown to be insensitive to the various cut-offs introduced in our
numerical approach. The spectra preserves a large hierarchy between long and
short-wavelength modes during the whole period of symmetry breaking and
Chern-Simons generation, confirming that the dynamics is driven by the low
momentum sector of the theory. We establish that the Chern-Simons production
mechanism is associated with local sphaleron-like structures. The corresponding
sphaleron rates are of order 10^{-5} m^4, which, within certain scenarios of
electroweak baryogenesis and a (not unnaturally large) additional source of CP
violation, could explain the present baryon asymmetry of the universe.Comment: 28 pages, 15 figures, ReVTeX. With minor corrections, version to
appear in Phys. Rev.
Neutrino Masses, Mixing and New Physics Effects
We introduce a parametrization of the effects of radiative corrections from
new physics on the charged lepton and neutrino mass matrices, studying how
several relevant quantities describing the pattern of neutrino masses and
mixing are affected by these corrections. We find that the ratio omega = sin
theta / tan theta_atm is remarkably stable, even when relatively large
corrections are added to the original mass matrices. It is also found that if
the lightest neutrino has a mass around 0.3 eV, the pattern of masses and
mixings is considerably more stable under perturbations than for a lighter or
heavier spectrum. We explore the consequences of perturbations on some flavor
relations given in the literature. In addition, for a quasi-degenerate neutrino
spectrum it is shown that: (i) starting from a bi-maximal mixing scenario, the
corrections to the mass matrices keep tan theta_atm very close to unity while
they can lower tan theta_sol to its measured value; (ii) beginning from a
scenario with a vanishing Dirac phase, corrections can induce a Dirac phase
large enough to yield CP violation observable in neutrino oscillations.Comment: 14 pages, 21 figures. Uses RevTeX4. Added several comments and
references. Final version to appear in PR
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