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Search Results: 1 - 10 of 25461 matches for " Marcus Ant?nio Rossi;Silveira "
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Efeitos colaterais da ranitidina aplicada em dose terapêutica em c?es saudáveis
Cavalcanti, Guilherme Albuquerque de Oliveira;Feliciano, Marcus Antnio Rossi;Silveira, Tatiana;Leite, Carlos Artur Lopes;Araújo, Roberto Baracat;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782009005000255
Abstract: the purpose of this study was to verify if the ranitidine dosage of 2mg kg-1 by intravenous path causes emesis or hypotension in healthy dogs. they were selected 10 labrador retriever, 10 beagles and 10 mongrel dogs, five animals of each sex. the animals were submitted to clinical examination and blood pressure evaluation before ranitidine administration and also 10 minutes and 4 hours after administration of it. after administration was observed that 13.3% of the animals presented normal; 6.7% of the dogs presented apathy; 50% of the animals presented salivation and 30% presented apathy, salivation, emesis mimic or emesis. there was no significative arterial blood pressure decrease after ranitidine administration. it was concluded that ranitidine useful in therapeutic dosage by intravenous path may provoke apathy, salivation, emesis mimic and emesis.
Adriana Augusto Aquino,Mariana Pereira Alves,Jo?o Paulo Fernandes Santos,Marcus Antnio Rossi Feliciano
Ciência Animal Brasileira , 2012,
Abstract: The aim of this study was to evaluate the effects of yeast cell wall extract (YCW) in dry diet on the fecal microbiota, concentration of short-chain fatty acids (SCFA) and on the odor reduction of cats feces. We used 20 animals of both sexes, randomly assigned to four treatments and five repetitions totaling 20 experimental units: 1) dry commercial diet (control); 2) control + 0.2%, 3) control + 0.4%, and 4) control + 0.6% of YCW in dry matter. Enterobacteriaceae and lactic acid bacteria, fecal concentration of acetic, propionic and butyric acids, ammonia nitrogen and sensory panel were performed. There were no significant differences (p> 0.05) for bacterial counts and the concentration of SCFA and ammonia, but in sensory panel a reduction in the odor of feces could be noted with the use of 0.2% of YCW. We concluded that the addition of up to 0.6% YCW had no effect on the microbiology and the concentration of fatty acids, but there is potential for its use as an additive because of the improvement in the odor of feces. However, further studies are needed to understand the mechanisms of action and the effects of prebiotics for domestic cats.
Early detection of doxorubicin myocardial injury by ultrasonic tissue characterization in an experimental animal model
Minna Moreira Romano, Antnio Pazin-Filho, Jo?o O’Connel, Marcus Sim?es, André Schmidt, érica C Campos, Marcos Rossi, Benedito Maciel
Cardiovascular Ultrasound , 2012, DOI: 10.1186/1476-7120-10-40
Abstract: Cardiotoxicity is one of the most feared complications related to doxorubicin (DXR) prescription in clinical practice, expressed primarily by myocardial focal sclerosis, which can evolve to irreversible ventricular diastolic and systolic dysfunctions.Serial quantification of left ventricle ejection fraction (LVEF) is the standard procedure to identify cardiotoxicity [1], but it is not sensitive enough to detect initial myocardial lesion [2,3]. Information regarding myocardial ultra-structure and composition, including the collagen deposition, can be provided by ultrasonic tissue characterization (UTC), a non-invasive technique that can detect and quantify acoustic properties of myocardial tissue [4,5]. Even though UTC has been used to detect myocardial damage in several myocardial collagen deposition diseases [6-10], its ability to do so in DXR cardiotoxicity is still debated. There is evidence of UTC abnormalities at the end of the DXR infusion [11-13]. In a previous pilot study performed in our laboratory (results yet not published), with rats receiving intraperitoneal DXR infusions, we found that UTC can potentially detect the myocardium texture alterations at the end of treatment with DXR, even in occasions where there was only a slight decrease in LVEF.This study was designed to assess the capability of UTC to detect myocardium injury due to DXR infusion earlier than LVEF, as evaluated using echocardiography in an experimental animal model and with histological quantification of collagen deposition.Sixty adults Wistar male rats (250 to 300g) were sedated and evaluated with echocardiographic examinations at basal situation as previously described [14]. Then, the animals received weekly endovenous DXR infusions of 2mg/Kg DXR up to a cumulative dosage of 16 mg/Kg. The animals were sedated and submitted to echocardiographic evaluations 7–15 days after the cumulative dosages of 8, 10, 12, 14, and 16 mg/Kg DXR. The protocol was approved by the Ethical Animal Research
Controle da esquistossomose no Brasil
Silveira, Antnio Carlos;
Memórias do Instituto Oswaldo Cruz , 1989, DOI: 10.1590/S0074-02761989000500010
Abstract: the great area with transmission of schistosomiasis in brazil (11% of the hole country) associated to the focal distribution of the helminthiasis makes the disease control a difficult goal, not only methodologically but also in terms of operation. since 1976, year when the special programme of schistosomiasis control was begun, it has been possible to devellop regular activities of control. since then, these activities are conducted in a vertical programme, which is being mantained till it will be possible to get to a prevalence of five percent or under this value. the regular checking of prevalence is made through routine screening works by using stools exams. this works gives the orientation to the activity of cases treatment. from this point, is expected that control activities be conducted by permanent health services. using of moluscocides is being controlled, so that it can be based in accurated epidemiological criteria. environmental management and education activities in special areas are being conducted with availlable resources. the results obtained demonstrate that a reduction of cases with the malignant evolution of the disease and also of the morbidity of schistosomiasis is being obtained, at least if we consider the available data in a more aggreagate form.
O Inquérito triatomínico (1975-1983)
Silveira, Antnio Carlos;
Revista da Sociedade Brasileira de Medicina Tropical , 2011, DOI: 10.1590/S0037-86822011000800005
Abstract: after the systematization and re-dimension of the vectorial control in all the country by 1975, it was considered necessary to have an up-to-date information on the distribution of vectors in brazil, and differentiate precisely the role of each of the different species on the intra-domiciliary transmission of chagas disease. for this purpose, sampling regional surveys for regions with non reliable information were performed, as well as, a house by house search for vectors on those areas considered at risk. for this last, 1,942 municipalities from 19 states were searched, as by the political division of the country by 1980, that was taken as a reference in this paper. these activities, that were implemented as part of the routine for intervention, were completed by 1983. immediately after, this work was also extended for other areas considered targets for infected bugs. results obtained, allowed to map the endemic area and the area under risk of vectorial transmission all over the country. even more, with the results obtained it was possible to recognize those five species proved as vectors of the infection, among thirty already identified. these species, in order of importance, were: triatoma infestans, panstrongylus megistus, t. brasiliensis, t pseudomaculata and t. sordida. it was possible also to verify the increase in the dispersion of t. infestans, an aloctonous vector captured now in states of the north-east region, where it was not recognized previously. in relation with native species, a clear division of territories among them was found. furthermore, p. megistus was found with a difuse distribution, but t. brasiliensis and t. pseudomaculata were restricted to the semi-arid noth-east. the most often captured bug was t. sordida, (mostly around houses) limited to the cerrado area, which is its origin.
Os novos desafios e perspectivas futuras do controle
Silveira, Antnio Carlos;
Revista da Sociedade Brasileira de Medicina Tropical , 2011, DOI: 10.1590/S0037-86822011000800016
Abstract: the epidemiological situation of chagas disease in brazil was substantially altered in the last decades, partially as a consequence of the control measures implemented and partially due to the environmental, economical and social changes that took place in the country. domicile vector transmission was interrupted when caused by triatoma infestans and importantly controlled when associated with native species of the vector. transfusion transmission is no longer a problem since generalized screening of blood donors came into routine. congenital transmission, although still possible, mainly in some areas, also tends to disappear due to the control in the vector and transfusion transmission. the primordial mechanisms of transmission directly related to the enzootic cycle, as the one caused by vectors outside the homes, or by sporadic entrance of vectors in the domicile, in addition to the oral transmission, started to become relevant in the generation of new infections by trypanosoma cruzi. the new challenges in facing chagas disease include: a) to preserve the excellent level of control that was achieved; b) to develop new technologies and methods of surveillance and control capable of reducing the risk of cases associated to enzootic transmission; c) to provide adequate medical attention to patients with the infection or the disease in its chronic stage.
Correla??o entre a escala de coma de Glasgow e os achados de imagem de tomografia computadorizada em pacientes vítimas de traumatismo cranioencefálico
Morgado, Fabiana Lenharo;Rossi, Luiz Antnio;
Radiologia Brasileira , 2011, DOI: 10.1590/S0100-39842011000100010
Abstract: objective: to describe the correlation between the glasgow coma scale, risk factors, age, sex and tracheal intubation with the cranial computed tomographic findings in patients with traumatic brain injury. materials and methods: a prospective, cross sectional study was developed with 102 patients who were given a glasgow coma score and submitted to computed tomography at the first 12 hours following admission. results: the mean age of the entire series was 37.77 ± 18.69 years, with prevalence of male patients (80.4%). the most common causes of head injury were: automobile accidents (52.9%), falls (20.6%), pedestrian injuries (10.8%), falls to the ground (7.8%) and aggression (6.9%). in the present study, 82.4% of patients had traumatic brain injury rated as mild, 2.0% as moderate and 15.6% as severe. tomographic findings such as subgaleal hematoma, skull fractures, subarachnoid hemorrhage, cerebral contusion, extra-axial blood collection and diffuse cerebral edema were observed in 79.42% of the patients. most of the findings of severe traumatic brain injury were observed in the patients above 50 years (93.7%) and in this group, all the patients required tracheal intubation. conclusion: statistical significance was observed in the correlation between the glasgow coma scale, age > 50 years (p < 0.0001), need for tracheal intubation (p < 0.0001) and ct findings.
Repercuss es psicológicas do adoecimento e tratamento em mulheres acometidas pelo cancer de mama Psychological consequences of the sickening and treatment of women affected by breast cancer
Leandra Rossi,Manoel Antnio dos Santos
Psicologia: Ciência e Profiss?o , 2003, DOI: 10.1590/s1414-98932003000400006
Abstract: A literatura evidencia que o diagnóstico e o tratamento do cancer de mama afetam a condi o emocional da mulher. Este estudo teve como objetivo investigar as repercuss es psicológicas associadas ao adoecer em mulheres com cancer de mama que já foram submetidas à mastectomia (total ou parcial), radioterapia e quimioterapia. Aplicou-se uma entrevista individual semi-estruturada a 10 pacientes, com idades compreendidas entre 41 e 50 anos. Os resultados mostram que as repercuss es psicológicas variam de acordo com a fase do adoecimento e tratamento (pré-diagnóstico, diagnóstico, tratamento e pós-tratamento), afetando o ajustamento psicossocial de maneira diferente nos estágios identificados, prejudicando a qualidade de vida da mulher acometida. As it is evidenced in the literature, the diagnosis and treatment of breast cancer affect the emotional condition of women. This study aimed to investigate the psychological reverberations associated to sickening in women affected by breast cancer who had already been submitted to mastectomy (total or partial), radiotherapy and chemotherapy. An individual semi-structured interview was used with 10 patients aging from 41 to 50 years old. The results show that the psychological reverberations vary according to the sickening and treatment phase (pre-diagnosis, diagnosis, treatment and post-treatment), affecting the psychosocial adjustment in different ways in the identified phases, impairing the quality of life of affected woman.
Can Really Regularized Amplitudes Be Obtained as Consistent with Their Expected Symmetry Properties?  [PDF]
OrimarOrimar Antnio Battistel, Gilson Dallabona, Marcus Vinicios Fonseca, Luciana Ebani
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.96070
Abstract: Through a very detailed investigation involving a set of simple perturbative amplitudes we show that the answer for the question put in the title of the present work is: undoubtedly NO! We are not restricting the sentence to the amplitudes which are considered as anomalous. The referred investigation is performed by using a procedure alternative to the traditional regularization methods. In the context of such a strategy the amplitudes are not modified in intermediary steps of the calculation, like traditional regularization procedures do, and only the validity of the linearity in the integration operation is assumed in the operations made in Feynman integrals typical of the perturbative calculations. The central point of the investigation is the question related to the consistent interpretation of the amplitudes. For these purposes, in all amplitudes having power counting indicating the possibility of divergences, the relations among Green functions, Ward identities and low energy limits are analyzed, in a model having different species of massive 1/2 spin fermions coupled to spin 0 and 1 (even and odd parity) boson fields, formulated in a space-time dimension D=1+1. We show that the maintenance of the linearity in operations involving Feynman integrals excludes the possibility of an anomalous term in the Ward identity relating the axial-vector and the pseudo-scalar-vector two point functions amplitudes. In addition, we show that it is not possible the maintenance of Ward identities and low energy limits in a consistent way if the amplitudes of the perturbative calculations are quantities to be regularized, just because there is no regularization method which is capable to give acceptable results for the divergent objects present in the calculations. This conclusion includes the Dimensional Regularization method which cannot give unique results if the linearity and the symmetric integration are simultaneously required in Feynman integrals. The qualitative conclusions apply in an equally-way in other space-time dimensions having, therefore, implications in many phenomenological consequences of quantum field theories stated through perturbative solutions.
Intelectuais e statemakers: Oliveira Vianna, Evaristo de Moraes Filho e a a??o coletiva no Brasil
Brasil Jr., Antnio da Silveira;
Estudos Históricos (Rio de Janeiro) , 2010, DOI: 10.1590/S0103-21862010000200005
Abstract: this article aims to examine comparatively the arguments of oliveira vianna and evaristo de moraes filho. both analyzed the brazilian society, but also participated in the state apparatus (in the ministry of labor), and created legal instruments to intervene on the society. i try to examine these two "moments", the sociological and the juridical one, in an integrated way, seeking the meaningful connections between their roles as statemakers and their cognitive perspectives.
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