University Federal do Cariri
University Federal do Cariri
Silva J.E.G.,University Federal do Cariri |
Maluf R.V.,Federal University of Ceará |
Almeida C.A.S.,Federal University of Ceará
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2017
We investigate the properties of a real scalar field in the Finslerian Randers spacetime, where the local Lorentz violation is driven by a geometrical background vector. We propose a dynamics for the scalar field by a minimal coupling of the scalar field and the Finsler metric. The coupling is intrinsically defined on the Randers spacetime, and it leads to a non-canonical kinetic term for the scalar field. The nonlinear dynamics can be split into a linear and nonlinear regimes, which depend perturbatively on the even and odd powers of the Lorentz-violating parameter, respectively. We analyze the plane-waves solutions and the modified dispersion relations, and it turns out that the spectrum is free of tachyons up to second-order. © 2017 The Authors
Oliveira M.P.,University Federal do Cariri |
Lima P.M.A.,Federal University of Pernambuco |
Da Silva H.J.,Federal University of Pernambuco |
De Mello R.J.V.,Federal University of Pernambuco
Acta Ortopedica Brasileira | Year: 2014
To identify, through a systematic literature review, the characteristics of neoplasm seeding in biopsy performed on the musculoskeletal system. We performed a search on PubMed, MEDLINE, LILACS and SciELO from August to October 2010. We included articles that addressed the neoplasm seeding in biopsy performed on the musculoskeletal system. The search was limited to English, Spanish and Portuguese as publication languages, but it was not limited by year of publication. We retrieved 2858 articles, but only seven were selected based on inclusion and exclusion criteria. Other four papers were found in the references of selected articles, totalizing 11 articles that were used to perform this systematic review. Issues may be raised in the literature: age and gender don't seem to influence the occurrence of neoplasm seeding; without resection of the biopsy tract, the possibility of local recurrence is very real; the influence of the type of tumor in the occurrence of neoplasm seeding is uncertain; it is impossible to conclude whether the closed biopsy technique has a lower chance of neoplasm seeding; it is likely that adjuvant chemotherapy has a protective effect against neoplasm seeding; an unfavorable prognosis is expected according to neoplasm seeding results.
PubMed | Federal University of Rio de Janeiro, University Federal do Cariri and Federal University of Pernambuco
Type: Journal Article | Journal: Zootaxa | Year: 2016
Artemisina is a microcionid characterized by lacking a distinctive choanosomal skeleton or definite spongin fibres, lacking also echinating spicules, and with a nearly radial ectosomal skeleton (Hooper 2002). The genus currently has 19 valid species, six of which are recorded from the Atlantic Ocean (Van Soest et al. 2016): A. erecta Topsent, 1904, A. incrustans van Soest et al., 2013, A. melana van Soest, 1984, A. melanoides van Soest et al., 2013, A. transiens Topsent, 1890 and A. vulcani Lvi, 1963. The present study describes a new species of Artemisina from Northeastern Brazil. Four specimens of Artemisina brasili sp. nov. were collected by snorkelling at Pernambuco State. All specimens were preserved in 80% ethanol and deposited in the Porifera Collections at the Universidade Federal de Pernambuco (UFPEPOR) and Museu Nacional of Universidade Federal do Rio de Janeiro (MNRJ).
PubMed | University of Sao Paulo and University Federal do Cariri
Type: | Journal: Chemico-biological interactions | Year: 2016
Pathological cardiac hypertrophy is characterized by wall thickening or chamber enlargement of the heart in response to pressure or volume overload, respectively. This condition will, initially, improve the organ contractile function, but if sustained will render dysfunctional mitochondria and oxidative stress. Mitochondrial ATP-sensitive K
PubMed | Federal University of Ceará, Federal University of Piauí, University Federal do Cariri and Regional University of Cariri
Type: | Journal: Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie | Year: 2016
This study reports the antibacterial properties and modulation analysis of antibiotic activity by -Ag
PubMed | Federal University of Piauí and University Federal do Cariri
Type: Journal Article | Journal: Anais da Academia Brasileira de Ciencias | Year: 2016
The main goal of this paper is to present a complete description of all translation hypersurfaces with constant r -curvature S r , in the Euclidean space n + 1 , where 3 r n - 1 .
da Costa A.N.L.,University Federal do Cariri |
Feitosa J.V.,University Federal do Cariri |
Montezuma P.A.,Jr. |
de Souza P.T.,University of Fortaleza |
de Araujo A.A.,University of Fortaleza
International Journal of Biometeorology | Year: 2015
This study compared the two breed groups of Girolando (½ Holstein ½ Gyr vs. ¾ Holstein ¼ Gyr) through analysis of the percentages (stressed or non-stressed cows) of rectal temperature (RT), respiratory rate (RR) and pregnancy rate (PR), and means of production and reproduction parameters to determine the group best suited to rearing in semiarid tropical climate. The experiment was conducted at the farm, in the municipality of Umirim, State of Ceará, Brazil. Two hundred and forty cows were used in a 2 × 2 factorial study; 120 of each group were kept under an intensive system during wet and dry seasons. The environmental parameters obtained were relative humidity (RH), air temperature (AT), and the temperature and humidity index (THI). Pregnancy diagnosis (PD) was determined by ultrasonography 30 days after artificial insemination (AI). The milk production of each cow was recorded with automated milkings in the farm. The variables were expressed as mean and standard error, evaluated by ANOVA at 5 % probability using the GLM procedure of SAS. Chi-square test at 5 % probability was applied to data of RT, RR, pregnancy rate (PR), and the number of AIs to obtain pregnancy. The majority of ½ Holstein cows showed mean values of RT and RR within the normal range in both periods and shifts. Most animals of the ¾ Holstein group exhibited the RR means above normal during the afternoon in the rainy and dry periods and RT means above normal during the afternoon in the dry period. After analyses, ½ Holstein crossbred cows are more capable of thermoregulating than ¾ Holstein cows under conditions of thermal stress, and the dry period was more impacting for bovine physiology with significant changes in physiological parameters, even for the first breed group. Knowledge of breed groups adapted to climatic conditions of northeastern Brazil can directly assist cattle farmers in selecting animals best adapted for forming herds. © 2015, ISB.
Lima E.P.,University Federal do Cariri |
Goulart M.O.F.,Federal University of Alagoas |
Neto M.L.R.,University Federal do Cariri
Memorias do Instituto Oswaldo Cruz | Year: 2014
The role of ATP-binding cassette (ABC) transporters in the efflux of the insecticide, temephos, was assessed in the larvae of Aedes aegypti. Bioassays were conducted using mosquito populations that were either susceptible or resistant to temephos by exposure to insecticide alone or in combination with sublethal doses of the ABC transporter inhibitor, verapamil (30, 35 and 40 μM). The best result in the series was obtained with the addition of verapamil (40 μM), which led to a 2x increase in the toxicity of temephos, suggesting that ABC transporters may be partially involved in conferring resistance to the populations evaluated. © 2014 Fundacao Oswaldo Cruz. All rights reserved.
De Lima L.L.,Federal University of Ceará |
Girao F.,Federal University of Ceará |
Lozorio W.,University da Integracao da Lusofonia Afro Brasileira |
Silva J.,University Federal Do Cariri
Classical and Quantum Gravity | Year: 2016
We use the inverse mean curvature flow to establish Penrose-type inequalities for time-symmetric EinsteinMaxwell initial data sets which can be suitably embedded as a hypersurface in Euclidean space Rn+1, n ≥ 3. In particular, we prove a positive mass theorem for this class of charged black holes. As an application, we show that the conjectured upper bound for the area in terms of the mass and the charge, which in dimension n=3 is relevant in connection with the cosmic censorship conjecture, always holds under the natural assumption that the horizon is stable as a minimal hypersurface. © 2016 IOP Publishing Ltd.
PubMed | Regional University of Cariri, Federal University of Paraiba, University Federal do Cariri and Federal University of Maranhão
Type: | Journal: Brazilian journal of biology = Revista brasleira de biologia | Year: 2016
The lizard Salvator merianae is a widely distributed species in South America, occurring from southern Amazonia to the eastern Andes and northern Patagonia. Studies on the parasitic fauna of this lizard have revealed that it is a host for helminths in various Brazilian biomes. The present work provides new parasitological data on the gastrointestinal nematodes associated with the lizard S. merianae. Sixteen specimens were analyzed from nine different locations in a semi-arid region in northeastern Brazil. Five species of nematodes were identified. Oswaldofilaria petersi was first recorded as a parasite of the S. merianae, thus increasing the knowledge of the fauna of parasites that infect large Neotropical lizards.