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Search Results: 1 - 10 of 67286 matches for " Francisco Paulo;Santos "
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Distance between residence and the dialysis unit does not impact self-perceived outcomes in hemodialysis patients
Paulo Santos, Francisco Plácido Arcanjo
BMC Research Notes , 2012, DOI: 10.1186/1756-0500-5-458
Abstract: We studied 161 ESRD patients undergoing HD during April 2009. Quality of life, depression and coping were assessed by the SF-36, the 10-item CES-D and the Jalowiec Coping Scale, respectively. The sample was stratified in three groups: I-patients residing in Sobral (where the dialysis unit is located); II-patients residing in towns up to 100?km from Sobral; and III-patients residing in towns distant greater than 100?km from Sobral. Analysis of variance was used to detect differences in quality of life and coping scores between the groups. Logistic regression was used to test distance as a predictor of depression.There were 47 (29.2%) patients residing in Sobral, 46 (28.6%) up to 100?km away and 68 (42.2%) greater than 100?km from Sobral. There were no differences related to quality of life and coping scores between the groups. Distance was not a predictor of depression.Social and cultural factors may explain the lack of differences. Studies from other regions are needed to clarify the distance effects on self-perceived outcomes among HD patients.The most common modality of dialysis worldwide is hemodialysis (HD) [1]. In Brazil [2], 90% of end-stage renal disease (ESRD) patients undergo conventional HD performed in a hospital or satellite dialysis unit. Only 10% of ESRD patients are treated with some kind of home-based dialysis, mainly peritoneal dialysis and very rarely home HD [2]. The prevalence of ESRD patients on dialysis is lower in North and Northeast Brazil, respectively 279 and 357 per million, when compared to the 583 per million undergoing dialysis in the Southeast, the country’s most developed region [2]. There is no biological cause for the lower prevalence in the North and Northeast regions. Difficult access to dialysis treatment is the reason. One of the most common obstacles to accessing dialysis treatment is the inadequate number of dialysis units in large territorial areas, forcing patients to travel long distances to get specialized treatment. These
A procedure for the parametric identification of viscoelastic dampers accounting for preload
Lépore Neto, Francisco Paulo;Santos, Marcelo Braga dos;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2012, DOI: 10.1590/S1678-58782012000200013
Abstract: passive vibration isolators are usually made of viscoelastic materials. these materials have non-linear characteristics that change their dynamical properties with temperature, frequency and strain level. the vibration isolator's mathematical modeling and optimal design require the prior knowledge of the stiffness and damping of the applied viscoelastic material. this work presents a dynamical characterization methodology to identify the stiffness and damping of three samples of viscoelastic rubber with hardness of 25, 33 and 48 shore a. the experimental apparatus is a one-degree of freedom vibratory mechanical system coupled to the viscoelastic damper. sweep sine excitations are applied to the system and the resulting forces and vibration levels are measured. the amplitude of the excitation is controlled to achieve a constant rms level of strain in the viscoelastic samples. the experimental results are obtained for conditions of no pre-strain and with a 10% of prestrain. the time domain data is post-processed to generate frequency response functions that are used to identify the damping and stiffness properties of the viscoelastic damper.
A Procedure for the Parametric Identification of Viscoelastic Dampers Accounting for Preload
Lépore Neto, Francisco Paulo;Santos, Marcelo Braga dos;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2011, DOI: 10.1590/S1678-58782011000300006
Abstract: passive vibration isolators are usually made of viscoelastic materials. these materials have non-linear characteristics that change their dynamical properties with temperature, frequency and strain level. the vibration isolator’s mathematical modeling and optimal design requires the prior knowledge of the stiffness and damping of the applied viscoelastic material. this work presents a dynamical characterization methodology to identify the stiffness and damping of three samples of viscoelastic rubber with hardness of 25, 33 and 48 shore a. the experimental apparatus is a one-degree of freedom vibratory mechanical system coupled to the viscoelastic damper. sweep sine excitations are applied to the system and the resulting forces and vibration levels are measured. the amplitude of the excitation is controlled to achieve a constant rms level of strain in the viscoelastic samples. the experimental results are obtained for conditions of no pre-strain and with a 10% of pre-strain. the time domain data is post-processed to generate frequency response functions that are used to identify the damping and stiffness properties of the viscoelastic damper.
Social adaptability and substance abuse: Predictors of depression among hemodialysis patients?
Santos Paulo Roberto,Arcanjo Francisco Plácido Nogueira
BMC Nephrology , 2013, DOI: 10.1186/1471-2369-14-12
Abstract: Background Several aspects linked to social are involved in the onset of depressive feelings. We aimed to find out if social adaptability and substance abuse predict depression among end-stage renal disease (ESRD) patients undergoing hemodialysis (HD). Methods We included 145 ESRD patients undergoing HD. Social adaptability was estimated by the Social Adaptability Index (SAI). Substance abuse was defined according to SAI. We screened for depression by applying the 20-item version of the Center for Epidemiologic Studies Depression Scale. A score ≥ 24 classified the patients as depressed. Comparisons between depressed and non-depressed patients were carried out and logistic regression was performed to test gender, age, total SAI, SAI without the substance abuse item, only the substance abuse score and substance abuse as a categorical variable (yes/no) as predictors of depression. Results There were 36 (24.8%) depressed patients. There were no differences regarding demographic and laboratory data between the depressed and non-depressed patients. Mean SAI among depressed and non-depressed patients was, respectively, 6.1 ± 1.6 vs. 6.2 ± 1.9 (p=0.901). The percentage of patients with or without substance abuse among depressed patients was, respectively, 13.8% vs. 13.9% (p=1.000). Gender, age, total SAI, SAI without the substance abuse item, only the substance abuse score and substance abuse as a categorical variable did not predict depression. Conclusions Social adaptability and substance abuse did not predict depression in HD patients. We propose that aspects related to socioeconomic status not comprised in SAI items should be ruled out as predictors of depression.
Reaction of arracacha genotypes to the root soft rot caused by Pectobacterium chrysanthemi
Henz, Gilmar Paulo;Reifschneider, Francisco José Becker;Santos, Fausto Francisco dos;
Pesquisa Agropecuária Brasileira , 2005, DOI: 10.1590/S0100-204X2005000100014
Abstract: the purpose of this paper was to screen thirty-two arracacha genotypes for their reaction to root soft rot. twenty roots of each genotype were inoculated with two pectobacterium chrysanthemi isolates in a randomized experiment (10 roots/isolate). after inoculation, roots were individually wrapped with pvc film and kept at 26oc in closed plastic bags. soft rot lesions were recorded after 36 hours and genotypes were grouped in four classes of susceptibility by cluster analysis: 10 were less susceptible, 16 intermediate, 3 susceptible and 3 very susceptible. all the tested arracacha genotypes showed only variation in the degree of susceptibility.
Immunoexpression of cyclooxygenase-2 in primary gastric carcinomas and lymph node metastases
Paulo RC Almeida,Francisco VA Ferreira,Cássio C Santos,Francisco D Rocha-Filho
World Journal of Gastroenterology , 2012, DOI: 10.3748/wjg.v18.i8.778
Abstract: AIM: To evaluate immunoexpression of cyclooxygenase-2 (COX-2) in primary gastric carcinomas and respective lymph node metastases. METHODS: Immunohistochemistry to analyze COX-2 expression was performed on tissue microarray slices obtained from 36 specimens of gastrectomy and satellite lymph nodes from patients with gastric carcinoma. RESULTS: Immunostaining was seen in most cases, and COX-2 expression was higher in lymph node metastases than in corresponding primary gastric tumors of intestinal, diffuse and mixed carcinomas, with a statistically significant difference in the diffuse histotype (P = 0.0108). CONCLUSION: COX-2 immunoexpression occurs freq- uently in primary gastric carcinomas, but higher expression of this enzyme is observed in lymph node metastases of the diffuse histotype.
Swimming performance of epigeal and hypogeal species of Characidae, with an emphasis on the troglobiotic Stygichthys typhlops Brittan & B hlke, 1965
Costa Sampaio Francisco Alexandre,Pompeu Paulo Santos,de Andrade e Santos Hersília,Lopes Ferreira Rodrigo
International Journal of Speleology , 2012,
Abstract: Swimming performance of fish constitutes a good ecophysiological tool to evaluate the ability of species to use different types of habitats. In order to understand how the swimming performance is related to the hydraulic environment, we compared the critical velocity of five fish (Characidae): Stygichthys typhlops (groundwater troglobiotic); Piabina argentea and Bryconamericus stramineus (riverine); Hemigrammus marginatus (generalist, found in rivers and floodplains) and Psellogrammus kennedyi (lacustrine). Swimming speed tests were performed in a respirometer-type apparatus. Total body length was the variable that best explained the maximum speed attained by all species under study. The critical swimming speed values (in body lengths per second) for each species were as follows: P. argentea (13.75); B. stramineus (9.32); H. marginatus (6.32); P. kennedyi (4.00); and lower in hypogean species, S. typhlops (3.31). All data of this study suggest a strong correlation between swimming performance and the hydraulic environment in which the species are found. The riverine, generalist and lacustrine species (the troglobiotic being included in the last group) showed a trend toward a decrease in speed.
Doen?a de bowen perianal - diagnóstico e tratamento: relato de caso
Peixoto Netto, Luciana Paes;Yamane, Hirotaka;Castro Junior, Paulo Cesar;Yamane, Yuri Diaz;Neves, Adriana Santos;Paulo, Francisco Lopes;
Revista Brasileira de Coloproctologia , 2009, DOI: 10.1590/S0101-98802009000100014
Abstract: the authors report a case and aimed at discussing about bowen's disease, an unusual pathology, especially in perianal area. it is an in situ carcinoma with invasive potential. epidermal's histological abnormalities with basal membrane preservation is its main characteristic. this disease presents a slow progression, few or no specific symptoms and variable macroscopic aspect. these facts lead in several times to a late diagnosis. biopsies and histopathological study confirm the diagnosis. the treatment of choice is wide surgical resection. often it is necessary to utilize grafts or flaps to correct the cutaneous defects and allows a satisfactory cicatrization.
Inbreeding levels in Northeast Brazil: strategies for the prospecting of new genetic disorders
Santos, Silvana;Kok, Fernando;Weller, Mathias;Paiva, Francisco Rennan Lopes de;Otto, Paulo A.;
Genetics and Molecular Biology , 2010, DOI: 10.1590/S1415-47572010005000020
Abstract: a new autosomal recessive genetic condition, the spoan syndrome (an acronym for spastic paraplegia, optic atrophy and neuropathy syndrome), was recently discovered in an isolated region of the state of rio grande do norte in northeast brazil, in a population that was identified by the ibge (brazilian institute of geography and statistics) as belonging to the brazilian communities with the highest rates of "deficiencies" (neri, 2003), a term used to describe diseases, malformations, and handicaps in general. this prompted us to conduct a study of consanguinity levels in five of its municipal districts by directly interviewing their inhabitants. information on 7,639 couples (corresponding to about 40% of the whole population of the studied districts) was obtained. the research disclosed the existence of very high frequencies of consanguineous marriages, which varied from about 9% to 32%, suggesting the presence of a direct association between genetic diseases such as the spoan syndrome, genetic drift and inbreeding levels. this fact calls for the introduction of educational programs for the local populations, as well as for further studies aiming to identify and characterize other genetic conditions. epidemiological strategies developed to collect inbreeding data, with the collaboration of health systems available in the region, might be very successful in the prospecting of genetic disorders.
Parasitismo em larvas de Phyllocnistis citrella Stainton (Lepdoptera: Gracillariidae) no estado do Rio de Janeiro
Nascimento, Francisco N. do;Santos, Wyratan da S.;Pinto, Jonas de M.;Cassino, Paulo C. R.;
Anais da Sociedade Entomológica do Brasil , 2000, DOI: 10.1590/S0301-80592000000200022
Abstract: a survey of natural enemies of phyllocnistis citrella stainton in citrus orchards, in the campus of the universidade federal rural do rio de janeiro, state of rio de janeiro, brazil, was conducted from march 1997 to december 1998. the emergence of cirrospilus sp., horismenus sp. (chalcidoidea: eulophidae) and elasmus sp. (chalcidoidea: elasmidae) from larvae of p. citrella was observed.
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