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Institution

University of Coimbra

EducationCoimbra, Portugal
About: University of Coimbra is a education organization based out in Coimbra, Portugal. It is known for research contribution in the topics: Population & Mitochondrion. The organization has 14318 authors who have published 43067 publications receiving 994733 citations. The organization is also known as: UC & Universidade dos Estudos Gerais.


Papers
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Journal ArticleDOI
TL;DR: It is proven that systems with a hyperbolic/elliptical mirror can be calibrated from the image of two lines and it is shown that the conic curves where the lines are mapped possess several projective invariant properties.
Abstract: In central catadioptric systems lines in a scene are projected to conic curves in the image. This work studies the geometry of the central catadioptric projection of lines and its use in calibration. It is shown that the conic curves where the lines are mapped possess several projective invariant properties. From these properties, it follows that any central catadioptric system can be fully calibrated from an image of three or more lines. The image of the absolute conic, the relative pose between the camera and the mirror, and the shape of the reflective surface can be recovered using a geometric construction based on the conic loci where the lines are projected. This result is valid for any central catadioptric system and generalizes previous results for paracatadioptric sensors. Moreover, it is proven that systems with a hyperbolic/elliptical mirror can be calibrated from the image of two lines. If both the shape and the pose of the mirror are known, then two line images are enough to determine the image of the absolute conic encoding the camera's intrinsic parameters. The sensitivity to errors is evaluated and the approach is used to calibrate a real camera.

168 citations

Journal ArticleDOI
Georges Aad1, Brad Abbott2, J. Abdallah3, A. A. Abdelalim4  +3139 moreInstitutions (192)
TL;DR: In this paper, a measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy root s = 7 TeV is presented.
Abstract: A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy root s = 7 TeV is presented. The measurement covers the pseudorapidity ranges vertical bar eta(gamma)vertical bar < 1: 37 and 1: 52 <= vertical bar eta(gamma)vertical bar < 1: 81 in the transverse energy range 15 <= E-T(gamma) < 100 GeV. The results are based on an integrated luminosity of 880 nb(-1), collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. The results are compared to predictions from next-to-leading-order perturbative QCD calculations.

168 citations

Journal ArticleDOI
TL;DR: It was demonstrated that the coating of the nanoparticles with sodium alginate not only avoided a burst release observed with uncoated particles but also increased the stability of the particles at pH 6.8 and 7.4, rendering them suitable carriers for intestinal mucosal vaccination.

168 citations

Journal ArticleDOI
TL;DR: The present review represents a state-of-the-art review of the research behind the application of EOs as anticancer agents both in vitro and in vivo.
Abstract: Essential oils are secondary metabolites with a key-role in plants protection, consisting primarily of terpenes with a volatile nature and a diverse array of chemical structures. Essential oils exhibit a wide range of bioactivities, especially antimicrobial activity, and have long been utilized for treating various human ailments and diseases. Cancer cell prevention and cytotoxicity are exhibited through a wide range of mechanisms of action, with more recent research focusing on synergistic and antagonistic activity between specific essential oils major and minor components. Essential oils have been shown to possess cancer cell targeting activity and are able to increase the efficacy of commonly used chemotherapy drugs including paclitaxel and docetaxel, having also shown proimmune functions when administered to the cancer patient. The present review represents a state-of-the-art review of the research behind the application of EOs as anticancer agents both in vitro and in vivo. Cancer cell target specificity and the use of EOs in combination with conventional chemotherapeutic strategies are also explored.

168 citations

Journal ArticleDOI
TL;DR: CHX is effective against E faecalis in vitro and further in vivo studies are needed to confirm the value of CHX in clinical treatment.
Abstract: Objective We sought to assess the efficacy of chlorhexidine (CHX) and calcium hydroxide, Ca(OH) 2 , against Enterococcus faecalis in vitro. Study design The effect of CHX (0.2% and 2% in gel or solution) and Ca(OH) 2 (alone or with 0.2% CHX gel) was evaluated by using the agar diffusion test and an in vitro human root inoculation method, to measure zone of inhibition or bacterial growth with optical density analysis, respectively. For optical density analysis, samples from infected root canals were collected after 7 days of medication and were cultured for 24 hours in brain-heart infusion to detect viable bacteria. Results In the agar diffusion test, CHX was effective against E faecalis in a concentration-dependent fashion, but Ca(OH) 2 alone had no effect. In the root canal inoculation test, CHX was significantly more effective against E faecalis than Ca(OH) 2 was ( P Conclusions CHX is effective against E faecalis in vitro. Further in vivo studies are needed to confirm the value of CHX in clinical treatment.

168 citations


Authors

Showing all 14693 results

NameH-indexPapersCitations
P. Chang1702154151783
Yang Gao1682047146301
Bin Liu138218187085
P. Sinervo138151699215
Filipe Veloso12888775496
Panagiotis Kokkas128123481051
Nuno Filipe Castro12896076945
Robert Gardner128101577619
Francois Corriveau128102275729
Peter Krieger128117181368
João Carvalho126127877017
Helmut Wolters12685175721
Nicola Venturi12679669518
Sai-Juan Chen121121173991
Harinder Singh Bawa12079866120
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20241
2023112
2022530
20213,237
20203,193
20193,090