1,074 research outputs found
Dermal mast cell counts in F2 Holstein x Gir crossbred cattle artificially infested with the tick Boophilus microplus (Acari : Ixodidae)
No full textThe role of dermal mast cells (DMC) in the host resistance to ticks has been studied but it is not totally explained yet. Studies have proposed that zebuine cattle breeds, known as highly resistant to ticks, have more DMC than taurine breeds. In the present study, we compared the number of adult female ticks Boophilus microplus and the mast cells' countings in the skin of F-2 crossbred Gir x Holstein cattle, before and after tick infestation. F-2 crossbred cattle (n = 148) were divided into seven groups and artificially infested with 1.0 x 10(4) B. nticroplus larvae and, 21 days afterwards, adult female-fed ticks attached to the skin were counted. Skin biopsies were taken and examined under light microscopy with a square-lined ocular reticulum in a total area of 0.0625 mm(2) in both the superficial and deep dermis. Results demonstrated that infested F-2 crossbred cattle acquired resistance against the cattle-tick B. microplus probably associated to an increase in the dermal mast cell number. It is concluded that the tick infestation may lead to an environmental modification in the dermis of parasitized hosts due to the massive migration of mast cells or their local proliferation.UNESP, Fac Ciências Agr & Vet, BR-14884900 Jaboticabal, SP, BrazilCtr Univ Barao Maua, BR-14090180 Ribeirao Preto, BrazilEmpresa Brasileira Pesquisa Agropecuaria, Ctr Nacl Pesquisa Gado Leite, BR-36038330 Juiz de Fora, MG, BrazilUNESP, Fac Ciências Agr & Vet, BR-14884900 Jaboticabal, SP, Brazi
The (un)intentional art of writing letters: Caio Fernando Abreu and the writing of the self
No full textThe edition and publication of letters of writers have been intensified in the last decades. On one hand, this is due to the fact that the letters cause an impression of reality, thus constituting a way to rebuild the identity of great authors. On the other hand, by enabling the access to the writer's universe the letters are valuable because they present themselves as a means of understanding the relationship between biography and work. However, we have to recognize that the letters are the discursive products of their authors, who use strategies in order to achieve certain effects of meaning. This article considers the letters as linguistic products, and based on the Lacanian theory, it investigates Caio Fernando's process of identity creation from the compilation Letters. The intention is to demonstrate how, for the writer, the letters represent, on one hand, a kind of monopoly of his image, and on the other hand, according to the thought of Jacques Derrida, a way to subscribe himself to the literary history. In order to understand how the author builds an image of the self, this article examines the different strategies employed by the sender in order to create an effect of reality.Univ Estadual Paulista, UNESP, Programa Posgrad Estudos Literarios, BR-14800901 Araraquara, SP, BrazilCtr Univ Barao de Maua, BR-14090180 Ribeirao Preto, SP, BrazilUniSEB Ctr Univ Estacio, BR-14096160 Ribeirao Preto, SP, BrazilUniv Estadual Paulista, UNESP, Programa Posgrad Estudos Literarios, BR-14800901 Araraquara, SP, Brazi
Effects of glycosaminoglycan polysulphate on the organisation of collagen fibres in experimentally induced tendonitis in horses
No full textAn inflammatory process was induced by intratendinous injection of bacterial collagenase into the superficial digital flexor tendon (SDFT) of the left thoracic limb of 10 horses. One week later, the tendons in five of the horses (group 1) were treated with glycosaminoglycan polysulphate (GAGPS), and the tendons of the other five (group 2) were treated with saline solution. The horses were euthanased 150 days after the collagenase injections, and samples of the SDFTs were frozen at -14 degrees C, sectioned at S to 7 pm longitudinally and transversely, and stained by the picrosirius red method. Morphometric analysis was used to quantify the organised and disorganised bundles of collagen in the samples from groups 1 and 2. Significantly more organised bundles of collagen were observed in the tendons treated with GAGPS.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Barao de Maua Univ Ctr, Dept Vet Pathol, BR-14090180 Ribeirao Preto, SP, BrazilSão Paulo State Univ, Fac Agr & Vet Sci, Dept Vet Pathol, BR-14884900 Jaboticabal, SP, BrazilSão Paulo State Univ, Fac Agr & Vet Sci, Dept Vet Pathol, BR-14884900 Jaboticabal, SP, Brazi
Elanela colombiana Barros, Barao & Grazia 2020
No full textElanela colombiana Barros, Barão & Grazia, 2020 Distribution. Colombia. Distribution in Colombia. Valle del Cauca. Remarks. Elanela colombiana has the disk of scutellum callused, callus pale brown, pro-, meso- and metafemur yellowish or light, abdominal sternite VII brown medially, gonocoxite VIII wider than long, and gonocoxite IX swollen. References. Barros et al. 2020.Published as part of Castro-Huertas, Valentina, Grazia, Jocelia, Forero, Dimitri, Fernández, Fernando & Schwertner, Cristiano F., 2022, Stink bugs (Hemiptera: Heteroptera: Pentatomidae) of Colombia: An annotated checklist of species, pp. 1-88 in Zootaxa 5097 (1) on page 57, DOI: 10.11646/zootaxa.5097.1.1, http://zenodo.org/record/603663
Elanela diamphidiosa Grazia, Barros & Barao 2016
No full textElanela diamphidiosa Grazia, Barros & Barão, 2016 Distribution. Colombia and Ecuador. Distribution in Colombia. Amazonas. Remarks. Elanela diamphidiosa has the pygophore with acute marginal processes on each side of the dorsal rim medially, each projected posteriorly and inwards in the genital cup; the parameres are apically spatulate, embedded in the abdominal segment X basally; the abdominal segment X is elongate, surpassing the posterior margin of the pygophore, carinate dorsally, sinuous distally, and blunt apically; the gonocoxites IX are strongly concave; and the anterior and posterior margins of the gonocoxites VIII are sinuate, with a notch medially. References. Grazia et al. 2016.Published as part of Castro-Huertas, Valentina, Grazia, Jocelia, Forero, Dimitri, Fernández, Fernando & Schwertner, Cristiano F., 2022, Stink bugs (Hemiptera: Heteroptera: Pentatomidae) of Colombia: An annotated checklist of species, pp. 1-88 in Zootaxa 5097 (1) on page 57, DOI: 10.11646/zootaxa.5097.1.1, http://zenodo.org/record/603663
Molecular and ultrastructural profiles of the symbionts in Cephalotes ants
No full textThe molecular and ultrastructural profiles of the symbionts found in the midgut and ileum of Cephalotes atratus, Cephalotes clypeatus, and Cephalotes pusillus were determined using the V3 region of the bacterial 16S rDNA gene and transmission electron microscopy (T.E.M.). Two samples of C atratus, three of C clypeatus, and six of C. pusillus were analyzed. The coefficients of similarity ranged from 80% to 94% for the samples of symbionts from C. clypeatus and C. atratus, despite being collected in geographically distant sites. The variability within symbionts found in the samples of C. pusillus varied from 29% to 55%, in samples geographically close as well as distant. PCR-DGGE was effective for the purpose of this study and can be considered a versatile tool to analyze gut microbiota. Details of the ultrastructural aspect of these bacteria are presented. (C) 2010 Elsevier Ltd. All rights reserved.Univ Estadual Campinas, Dept Genet Evolucao & Bioagentes, Inst Biol, BR-13083970 Campinas, SP, BrazilUniv Estadual Paulista, Dept Biol, BR-13506900 Rio Claro, SP, BrazilUniversidade Federal do ABC (UFABC), Ctr Ciencias Nat & Humans, BR-09090400 Santo Andre, BrazilCtr Univ Barao Maua, BR-14090180 Ribeirao Preto, SP, BrazilUniv Estadual Paulista, Dept Biol, BR-13506900 Rio Claro, SP, Brazi
Evaluation of cardiorespiratory effects of an adjunct butorphanol in total intravenous anaesthesia protocol in goats under laparoscopy
No full textTo evaluate the cardiorespiratory effects and postoperative analgesia of a total intravenous anesthesia protocol, twenty-four adult goats were assigned to four experimental groups: G1 and G2 underwent to laparoscopic procedure every 15 days, while G3, and G4 every 30 days. Xylazine (0.05 mg/kg IM) in all animals and butorphanol (0.5 mg/kg IM) in animals of G2 and G4 were used as premedication. Ketamine (2.0 mg/kg IV) anaesthetic induction was performed and subsequently the sheep were intubated and received oxygen (FiO(2) = 1.0). Animals were positioned in a Trendelenburg position and anaesthetic plane maintained by constant infusion of 2 mL/kg/h IV of a solution composed of: 12.5 g of guaiacolate, 25 mg of xylazine and 250 mg of ketamine in 250 mL of 5% dextrose. Haemo-gasometric (pH, PO2 PCO2, cHCO(3)) and clinical parameters (HR, RR, MAP and T), recovery time and postoperative analgesia were evaluated at different times of the anesthetic-surgical procedure. BR, RR, T, pH, PO2, PCO2 and cHCO(3) varied through surgical time and PCO2 was significantly higher in butorphanol treated animals. The studied anaesthetic protocol resulted in a prolonged recovery, clinical hypotension and respiratory acidosis; butorphanol supplementation caused an increase in PaCO2 with no evident improvement of postoperative analgesia. Therefore, the practical application of this protocol indicates a special fluid, ventilation and recovery care. Further studies are needed on the analgesic effect of butorphanol in these situations to allow its indication.Univ Fed Vale Sao Francisco, Petrolina, PE, BrazilUniv Estadual Paulista, Fac Ciencias Agr & Vet, Jaboticabal, SP, BrazilCtr Univ Barao de Maua, Ribeirao Preto, SP, BrazilUniv Estadual Norte Fluminense, Ctr Ciencias & Tecnol Agr, Goytacazes, RJ, BrazilUniv Sao Paulo, Fac Med Vet & Zootecnia, Pirassununga, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazi
Non-linear 3d Finite Element Analysis Of Full-arch Implant-supported Fixed Dentures
No full textDespite the necessity for faster clinical protocols for immediate loading of implant-supported dentures, there is a lack of biomechanical studies to confirm the rigid splinting effectiveness. We compared the stress in mandibular full-arch implant-supported fixed dentures under immediate loading through three-dimensional finite element analysis. Edentulous human mandible models were restored with a 4-implant fixed denture. Implants were splinted with a metallic framework and submitted to conventional loading (group A - control), with acrylic resin and submitted to immediate loading (group B), with a metallic framework and submitted to immediate loading (group C), and with acrylic resin and a prefabricated distal bar and submitted to immediate loading (group D). Models were supported by masticatory muscles. A 100-N oblique load was applied on the first molar. Group A presented the lowest stress and implant displacement values, whereas group D showed the highest values. 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