718 research outputs found
Water intake in sheeps fed different levles of prickly pear (Opuntia Ficus Indica) in Brazil
En 45 ovinos machos Santa Inés (peso vivo
medio de 27,50 ± 0, 48 kg) se evaluó el consumo
de agua, al consumir raciones con niveles crecientes
(0, 25, 50, 75, 100%) de nopal (Opuntia
fĂcus indica Mill) en sustituciĂłn al maĂz molido. El
diseño fue en bloques al azar con nueve repeticiones.
El consumo de materia seca respondiĂł de
modo cuadrĂĄtico, perjudicando el peso final, que
disminuyĂł, con el aumento del nopal en la dieta.
AumentĂł el consumo de materia natural disminuyendo
el de agua, el consumo total de agua
aumentĂł en el tratamiento con mayor cantidad de
nopal. La relaciĂłn de consumos: agua voluntaria/
materia seca, disminuyĂł al aumentar el nopal. El
nopal constituye una reserva de agua para ovinos
Santa Inés en condiciones semiåridas de Brasil.The water intake in 45 male (27.50 ± 0.48 kg
of mena body weight) Santa Ines sheep fed with
increasing levels (0, 25, 50, 75, 100% DM basis)
of prickly pear (Opuntia ficus indica Mill) to replace
corn was studied. A completely randomized block
design with nine replications per treatment was
used. Quadratic behavior was observed for the
intake of dry matter, hitting the final weight, which
decreased with increasing the cactus in the diet.
There was an increase in the intake of natural
material and a decrease in voluntary water intake;
total water intake increased, and the ratio of
intakes: water/dry matter, decreased in the
treatment with larger cactus proportion. The pryckly
pear constitues a water reservoir for Santa InĂȘs
sheep in Brazilian semiarid conditions
Evaluation of diabetic foot amputation rate
Acta Med Port. 2003 Nov-Dec;16(6):373-80. Epub 2003 Dec 1.
[Evaluation of diabetic foot amputation rate].
[Article in Portuguese]
Horta C, Vilaverde J, Mendes P, Gonçalves I, Serra L, Pinto PS, Almeida R, Carvalho R, Dores J, Serra MB.
Serviços de Endocrinologia, Ortopedia e Cirurgia Vascular, Hospital Geral de Santo António, Porto.
Abstract
In 1987, it was created the first portuguese Diabetic Foot Clinic in Oporto, at the Hospital Geral de Santo AntĂłnio. The distinction between neuropathic and ischaemic foot was the key stone to reduce drastically the rate of major amputations in the first two years of activity. Since then and until 1995 the rate of major amputations had stabilised around 8%. The aim of the present study was to evaluate if there was any change in the last three years. A retrospective study was performed reviewing the clinical files of 843 new patients between 1998 and 2000. The 593 patients who presented with a foot ulcer with or without infection were selected: 60.4% with neuropathic foot and 39.6% with ischaemic one. Overall, 31 of the 593 patients with ulcer or infection were treated with major amputation (5.2%). There was a statistical difference between the major amputation outcome among the two types of foot (p < 0.001). Necrosis showed to carry a poor prognosis (30.7% in ischaemic foot vs 8,3% in neuropathic, p = 0.024). There was no further statistical significance for age, sex, type or duration of diabetes as risk factors for major amputation. This retrospective study has showed a slight reduction in the rate of major amputations since 1995. Poor prognosis was related to necrosis and ischaemic foot. Further improvement requires harder investment in patients' education, as well as in alerting the primary health care physicians, for the most unpredictable catastrophic complication of diabetes.
PMID: 15631847 [PubMed - indexed for MEDLINE
The effect of amoxicillin on dental enamel development in vivo
The exposure to amoxicillin has been associated with molar incisor hypomineralization. This study aimed to determine if amoxicillin disturbs the enamel mineralization in in vivo experiments. Fifteen pregnant rats were randomly assigned into three groups to received daily phosphatase-buffered saline or amoxicillin as either 100 or 500 mg/kg. Mice received treatment from day 13 of pregnancy to day 40 postnatal. After birth, the offsprings from each litter continued to receive the same treatment according to their respective group. Calcium (Ca) and phosphorus (P) content in the dental hard tissues were analyzed from 60 upper first molars and 60 upper incisors by the complexometric titration method and colorimetric analysis using a spectrophotometer at 680 nm, respectively. Lower incisors were analyzed by X-ray microtomography, it was measured the electron density of lingual and buccal enamel, and the enamel and dentin thickness. Differences in Ca and P content and electron density among the groups were analyzed by one-way ANOVA. There was no significant difference on enamel electron density and thickness among the groups (p > 0.05). However, in incisors, the higher dose of amoxicillin decreased markedly the electron density in some rats. There were no statistically significant differences in Ca (p = 0.180) or P content (p = 0.054), although the higher dose of amoxicillin could affect the enamel in some animals. The amoxicillin did not significantly alter the enamel mineralization and thickness in rats. © 2020Peer reviewe
Research of the optical communications groups at University of Aveiro and Institute of Telecommunications - Aveiro Pole
This paper summarizes the research activities of the optical communications group at University of Aveiro and Institute of
Telecommunications â Aveiro pole. Several activities like clock recovery systems, both electrical and all optical, electrical
equalizers for very high bit rate DST systems, post-detection filters for multigigabit optical receivers, soliton systems,
simulation work on WDM, DST, EDFA and short pulse generation for high bit rate systems are presented
Genetic characterization of cassava (Manihot esculenta) landraces in Brazil assessed with simple sequence repeats
Based on nine microsatellite loci, the aim of this study was to appraise the genetic diversity of 42 cassava (Manihot esculenta) landraces from selected regions in Brazil, and examine how this variety is distributed according to origin in several municipalities in the states of Minas Gerais, SĂŁo Paulo, Mato Grosso do Sul, Amazonas and Mato Grosso. High diversity values were found among the five above-mentioned regions, with 3.3 alleles per locus on an average, a high percentage of polymorphic loci varying from 88.8% to 100%, an average of 0.265 for observed heterozygosity and 0.570 for gene diversity. Most genetic diversity was concentrated within the regions themselves (HS = 0.52). Cluster analysis and principal component based scatter plotting showed greater similarity among landraces from SĂŁo Paulo, Mato Grosso do Sul and Amazonas, whereas those from Minas Gerais were clustered into a sub-group within this group. The plants from Mato Grosso, mostly collected in the municipality of General Carneiro, provided the highest differentiation. The migration of human populations is one among the possible reasons for this closer resemblance or greater disparity among plants from the various regions
Origins of the Ambient Solar Wind: Implications for Space Weather
The Sun's outer atmosphere is heated to temperatures of millions of degrees,
and solar plasma flows out into interplanetary space at supersonic speeds. This
paper reviews our current understanding of these interrelated problems: coronal
heating and the acceleration of the ambient solar wind. We also discuss where
the community stands in its ability to forecast how variations in the solar
wind (i.e., fast and slow wind streams) impact the Earth. Although the last few
decades have seen significant progress in observations and modeling, we still
do not have a complete understanding of the relevant physical processes, nor do
we have a quantitatively precise census of which coronal structures contribute
to specific types of solar wind. Fast streams are known to be connected to the
central regions of large coronal holes. Slow streams, however, appear to come
from a wide range of sources, including streamers, pseudostreamers, coronal
loops, active regions, and coronal hole boundaries. Complicating our
understanding even more is the fact that processes such as turbulence,
stream-stream interactions, and Coulomb collisions can make it difficult to
unambiguously map a parcel measured at 1 AU back down to its coronal source. We
also review recent progress -- in theoretical modeling, observational data
analysis, and forecasting techniques that sit at the interface between data and
theory -- that gives us hope that the above problems are indeed solvable.Comment: Accepted for publication in Space Science Reviews. Special issue
connected with a 2016 ISSI workshop on "The Scientific Foundations of Space
Weather." 44 pages, 9 figure
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
Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC
Measurements of inclusive jet suppression in heavy ion collisions at the LHC
provide direct sensitivity to the physics of jet quenching. In a sample of
lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated
luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with
a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the
transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the
anti-kt algorithm with values for the distance parameter that determines the
nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of
the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp.
Jet production is found to be suppressed by approximately a factor of two in
the 10% most central collisions relative to peripheral collisions. Rcp varies
smoothly with centrality as characterized by the number of participating
nucleons. The observed suppression is only weakly dependent on jet radius and
transverse momentum. These results provide the first direct measurement of
inclusive jet suppression in heavy ion collisions and complement previous
measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables,
submitted to Physics Letters B. All figures including auxiliary figures are
available at
http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02
Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment
This paper describes an analysis of the angular distribution of W->enu and
W->munu decays, using data from pp collisions at sqrt(s) = 7 TeV recorded with
the ATLAS detector at the LHC in 2010, corresponding to an integrated
luminosity of about 35 pb^-1. Using the decay lepton transverse momentum and
the missing transverse energy, the W decay angular distribution projected onto
the transverse plane is obtained and analysed in terms of helicity fractions
f0, fL and fR over two ranges of W transverse momentum (ptw): 35 < ptw < 50 GeV
and ptw > 50 GeV. Good agreement is found with theoretical predictions. For ptw
> 50 GeV, the values of f0 and fL-fR, averaged over charge and lepton flavour,
are measured to be : f0 = 0.127 +/- 0.030 +/- 0.108 and fL-fR = 0.252 +/- 0.017
+/- 0.030, where the first uncertainties are statistical, and the second
include all systematic effects.Comment: 19 pages plus author list (34 pages total), 9 figures, 11 tables,
revised author list, matches European Journal of Physics C versio
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