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Search Results: 1 - 10 of 122461 matches for " Marcos André dos Santos da Silva "
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Estimating age of Brazilians using the methods of Demirjian and Nicodemo, Moraes and Médici: A comparative analysis  [PDF]
Ricarda Duarte da Silva, Marcos André Duarte da Silva, Aline Yumi Uezono, Simone Borges Braga dos Santos Queiroz, Rogério Nogueira de Oliveira
Forensic Medicine and Anatomy Research (FMAR) , 2013, DOI: 10.4236/fmar.2013.13011
Abstract: This study proposed to evaluate the precision of Nicodemo, Moraes and Médici method and the method proposed by Demirjian and compare both methodologies in relation to the efficiency and applicability in the Brazilian population. The sample consisted of 124 panoramic radiographs of subjects in the age group from 7 to 16 years old, 66 patients female and 58 male. For the comparison of the genders in relation to the average percentage difference, the t-Student test was considered. In average the method of Nicodemo, Moraes and Médici presented for the female gender an estimated result 14.7% lower than the real age. For the male gender the estimative obtained was that for each year of variation of the real age the method of Nicodemo estimates a variation of 0.48 years, with a confidence interval of 95% given by (0.43; 0.54). For the method of Demirjian the result was that for each year of variation of the real age the method of Demirjian estimates a variation of 1.00 year, with a confidence interval of 95% given by (0.85; 1.15) for the male gender and 0.96 years, with a confidence interval of 95% given by (0.84; 1.08) for the female gender. It is concluded that the Method of Nicodemo, Moraes and Médici tends to underestimate the real age and that as the real age increases this underestimate becomes higher. Now, the method of Demirjian tends to over- estimate the real age in 8.2 months for the male gender and in 7.1 for the female one in average.

Evaluation of radiographic waste management in dental offices and radiology clinics of S o Luís (MA)
Marcos André dos Santos da Silva,Oswaldo Serra dos Santos-Neto,Jefson Moraes Amorim,José Bauer
RSBO , 2012,
Abstract: Introduction: Lack of information continues to lead the professionals of various areas to contribute to environment degradation, and Dentistry is a potential source of contamination through chemical residues resulting from radiographic procedures. Objective: To evaluate the management of residues resulting from radiographic processing in dental radiology clinics and dental offices in S o Luís – MA, Brazil. Material and methods: A semi-structured questionnaire was prepared with the aim of characterizing the behavior of professionals and their procedures for discarding the processing solutions (developer, fixer, and water) and radiographic packing materials. A sample of 100 individuals represented 7.8% of the total number of 1,281 dentists in the city of S o Luís. Results: A total of 92% of the participants believed that radiographic effluents could cause damage to the environment. Concerning to the fixer discarding, 43% affirmed that they threw the solution directly through the sink, 36% diluted the fixer in water and threw it into the sink, 14% used a specialized company to discard it and 7% used other means. The developer was discarded as follows: 42% threw it down the sink, 36% diluted it in water before throwing it into the sink, 13% used a specialized company to discard it and 9% used other ways. Considering to the discarding of the packing of the radiographic films, 51% threw them into the trash and 49% used a specialized disposal company. Conclusion: Large portions of dentists do not discard radiographic processing residues and films correctly.
Distribui??o e ciclo de vida das espécies de peixes mais abundantes da laguna de Marapendi, Rio de Janeiro, Brasil
Barbien, Luis R. R.;Andreata, José V.;Santos, Marcos A.;Silva, Maria H.C. da;Sebilia, Andrés S.C.;Santos, Ricardo P. dos;
Revista Brasileira de Zoologia , 1990, DOI: 10.1590/S0101-81751990000300004
Abstract: monthly sampling from march 1981 to april 1983 using beach seines, cast nets and gill nets indicated six species, xenomelaniris brasiliensis, brevoortia pectinata, geophagus brasiliensis, gerres aprion, genidens genidens and achirus lineatus, as the most abundant fishes in the marependi lagoon, rio de janeiro, brazil the species presented a long reproductive period and the recruitment distributed throughout the year. analysis of the mean catch per unit effort in relation to month, sampling areas, and environmental factors along with analysis of the length frequency distribution by depth strata indicated that the spatial distribution, related to depth and occurrence of submerged aquatic vegetation seem to be the main factors regulating the species distribution. alteration of the environmental conditions in the lagoon due to the opening of the marapendi channel in 1984 caused significative modification in the distribution and abundance patterns of the main species. the impact of these alterations in the marapendi lagoon fish community has yet to be determined.
Evaluation of digital optical density of bone repair in rats medicated with ketoprofen
Martins, Márcia Valéria;Silva, Marcos André dos Santos da;Medici Filho, Edmundo;Moraes, Luiz Cesar de;Castilho, Julio Cezar de Melo;Rocha, Rosilene Fernandes da;
Brazilian Dental Journal , 2005, DOI: 10.1590/S0103-64402005000300007
Abstract: the purpose of this study was to evaluate the influence of ketoprofen on bone repair process in tibiae of rats by means of analysis of the digital optical density. twenty wistar rats were assigned to two groups: an untreated control group and a group treated with ketoprofen. the experimental procedures comprised the following stages: general anesthesia, preparation of a unicortical bone defect on the left tibia of each rat, medication with ketoprofen and radiographic examination. digital radiographic images were acquired using visualix gx-s-hdi? digital sensor and an x-ray equipment. radiographs were taken at baseline, 7, 14, 21 and 30 days postoperatively and the optical density (od) was evaluated using the vix wintm 1.4 system. the mean values of od readings were analyzed statistically by anova and tukey's test with significance level set at á=5%. the control group showed a statistically significant correlation (p=0.001) between time and optical density, while the ketoprofen group exhibited a weak and not statistically significant correlation (p=0.100). the control group presented the smallest od ratios at days 1 and 7, and the greatest od ratios at days 14, 21 and 30, with statistically significant difference (p=0.001). there was no significant differences (p=0.100) among the od ratios in the ketoprofen group, regardless of the evaluation period. the findings of this study suggest that ketoprofen influenced bone repair process because there was an increase in optical density during the first week and delayed new bone formation after the 21st day.
Assessment of divine proportion in the cranial structure of individuals with Angle Class II malocclusion on lateral cephalograms
Silva, Marcos André dos Santos da;Médici Filho, Edmundo;Castilho, Julio Cezar de Melo;Gil, Cássia T. Lopes de Alcantara;
Dental Press Journal of Orthodontics , 2012, DOI: 10.1590/S2176-94512012000300018
Abstract: introduction: the study of the divine proportion (φ = 1.618) began with the greeks, having as main researchers the mathematician pythagoras and the sculptor phidias. in dentistry, ricketts (1981-82) was an early to study this issue. objective: this study proposed to evaluate how some cephalometric measures are presented in relation to the divine proportion, with the total of 52 proportions, formed by 28 cephalometric landmarks. methods: lateral cephalograms of 40 class ii adults patients aging from 17 to 45 years (13 male and 27 female) were evaluated. the linear distances between the landmarks were measured using radiocef studio software. results: after statistical analysis, the data shown an average of 65,48% in the divine proportion, 17,5% in the relation ans-op/v1s-dm16 and 97,5% in the relations na-me/na-pona e na-pona/na-gn. conclusion: among all cephalometric measurements investigated, the lower facial third and the dental arches showed the smallest percentages of divine proportion.
Lack of association between nutritional status and change in clinical category among HIV-infected children in Brazil
Centeville, Maraisa;Morcillo, André Moreno;Barros Filho, Antonio de Azevedo;Silva, Marcos Tadeu Nolasco da;Toro, Adyléia Aparecida Dalbo Contrera;Vilela, Maria Marluce dos Santos;
Sao Paulo Medical Journal , 2005, DOI: 10.1590/S1516-31802005000200006
Abstract: context and objective: malnutrition is common among hiv-infected children. our objective was to study the occurrence of malnutrition and its relationship with changes in clinical category among hiv-infected children. design and setting: longitudinal study, at the pediatrics department and pediatrics investigation center (ciped), faculdade de ciências médicas da universidade estadual de campinas (unicamp). methods: we reviewed the hospital records of 127 vertically hiv-infected children. anthropometric measurements were obtained at the beginning of follow-up, at clinical category change and five months later. these were converted to z-scores of weight/age, height/age and weight/height. data were presented as means, standard deviations, frequency counts and percentages. the wilcoxon and kruskal-wallis tests and odds ratios were used in the analysis. results: we found that 51 (40.2%) were undernourished and 40 (31.5%) were stunted, with higher risk of being included in clinical category c. there was an association between nutritional condition and the clinical categories of the centers for disease control classification (1994), and with age at symptom onset (except for height z-score). during follow-up, 36 patients (28.4%) changed their clinical category, which occurred early among the undernourished patients. the group that changed its clinical category maintained the same z-score distribution for weight, height and weight/height throughout follow-up. conclusion: aids manifestation severity was associated with nutritional status and with age at symptom onset, but change in clinical category was not followed by worsening of nutritional status.
Hepatotoxicity in HIV-infected children and adolescents on antiretroviral therapy
Gil, Ana Cecília Montes;Lorenzetti, Raquel;Mendes, Gun Bergsten;Morcillo, André Moreno;Toro, Adyléia Aparecida Dalbo Contrera;Silva, Marcos Tadeu Nolasco da;Vilela, Maria Marluce dos Santos;
Sao Paulo Medical Journal , 2007, DOI: 10.1590/S1516-31802007000400002
Abstract: context and objective: adverse drug reactions are a significant problem in patients on antiretroviral therapy (art). we determined liver enzyme elevation frequencies in hiv-infected children and adolescents receiving art, and their association with risk factors. design and setting: cross-sectional study, at the pediatrics immunodeficiency division, university hospital, universidade estadual de campinas. methods: medical records of 152 children and adolescents (54.6% male; median age 7.48 years) were analyzed, with a mean of 2.6 liver enzyme determinations per patient. clinically, patients were classified in categories n (6), a (29), b (78) and c (39). serum levels of aspartate aminotransferase and alanine aminotransferase were evaluated. hepatotoxicity was scored as grade 1 (1.1-4.9 times upper limit of normality, uln), grade 2 (5.0-9.9 times uln), grade 3 (10.0-15.0 times uln) and grade 4 (> 15.0 times uln). to assess hepatotoxicity risk factors, odds ratios (or) and adjusted odds ratios (aor) for age, gender, tcd4+ cell count, viral load and medication usage were calculated. results: we observed grade 1 hepatotoxicity in 19.7 % (30/152) patients. no cases of grade 2, 3 or 4 were detected. there was a significant association between hepatotoxicity and use of sulfonamides (or, 3.61; 95% confidence interval (ci), 1.50-8.70; aor, 3.58; 95% ci, 1.44-8.85) and antituberculous agents (or, 9.23; 95% ci, 1.60-53.08; aor, 9.05; 95% ci, 1.48-55.25). no toxicity was associated with art. conclusions: one fifth of patients experienced mild hepatotoxicity, attributed to antituberculous agents and sulfonamides. our results suggest that art was well tolerated.
Environmental Issues on the Industrial Processing of Raw Agate  [PDF]
Fernanda da Silva Vilasb?as, Cassiano Rossi dos Santos, Ivo André Homrich Schneider
Geomaterials (GM) , 2017, DOI: 10.4236/gm.2017.71002
Abstract: Agate geodes are treated and stained for the production of handmade artifacts and jewelry, which greatly increases their aggregate value. Unit operations involve storage, sorting, cutting, crushing, dyeing, polishing, washing, and finishing. Substantial amounts of waste materials are produced, which include agate pieces, powders (with or without oils), and wastewaters from organic and inorganic staining procedures. The aim of this work was to quantify the amounts of these waste materials, their characteristics, and possibilities for reuse or recycling in other productivity sectors in the context of the second decade of the 21st century. A review of the theme was carried out and possibilities were analyzed in the light of classic and new technologies.
Characterization of Clinical and Environmental Isolates of Cryptococcus neoformans/Cryptococcus gattii Complex Maintained in Yeast Culture Collection in São Paulo, Brazil  [PDF]
Pedro Henrique Magalh?es Cardoso, Bosco Christiano Maciel da Silva, Jairo Ivo dos Santos, Rennan Luiz Oliveira dos Santos, Diniz Pereira Leite Júnior, Marcos Ereno Auler, Luciana da Silva Ruiz, Eriques Gon?alves da Silva, Débora Moreira, Carina Domaneschi, Francisco de Assis Baroni, Marcia de Souza Carvalho Melhem, Marilena dos Anjos Martins, Claudete Rodrigues Paula
Open Journal of Epidemiology (OJEpi) , 2018, DOI: 10.4236/ojepi.2018.82007
Abstract: Objective: As isolates of Cryptococcus are frequently kept collection stocks in institutions, sometimes without proper characterization, we sought to determine the genotype profiles, protease and phospholipase activities “in vitro” and the susceptibility testing for azoles and amphotericin B. Methodology: 84 isolates from several regions of Brazil (40 samples from clinical origin and 44 isolates from environmental origin) were maintained at the microorganism’s bank of the Biomedical Science Institute (ICB-USP) of the São Paulo University, in São Paulo, Brazil. This isolates was submitted fungal strains determination, DNA extraction and purification, determination of genotype by URA5 gene RFLP of CGB-positive isolates, protease and phospholipase activity and susceptibility to antifungals. Results: Of six CGB positive isolates tested by RFLP-PCR, only four presented a genomic profile consistent C. gattii species (VGII), while two other were C. neoformans (VNI and VNIII), indicating the existence of canavanine-resistante C. neoformans isolates in the culture collections. The clinical isolates secreted higher levels of phospholipase and environmental isolates but no differences were observed for the protease levels. Almost all isolates were sensible to azoles and amphotericin B. Conclusion: We point out in this research the existence of C. neoformans strains resistant to canavanine and intrinsic characteristic of C. gatti. These results demonstrate the importance to perform a detailed characterization of isolates kept in culture collections.
Gas Exchange and Growth of Medicinal Plant Subjected to Salinity and Application of Biofertilizers  [PDF]
Sergiane Beatriz da Silva Mesquita, José Adriano da Silva, Rafael Santiago da Costa, Móises Wilkson Nunes dos Santos, Claudivan Feitosa de Lacerda, Aiala Vieira Amorim, Antonio Marcos Esmeraldo Bezerra
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.516266

The objective of this study was to evaluate the use of biofertilizers and saline waters on gas exchange and growth of medicinal plant Plectrantus amboinicus. The experiment was conducted in the period February to May 2013 in a greenhouse. The experimental design was completely randomized in a 2 × 4 factorial arrangement, with two levels of salinity of irrigation water (ECw: 0.7 and 3.1 dS m-1) and four levels of bovine liquid biofertilizer applied to the soil, corresponding to 0%, 10%, 20% and 30% of the soil volume, with five replications. The experiment lasted 60 days, counted from the beginning of the treatments. The stomatal conductance (gs), photosynthesis (A), transpiration (E), intrinsic water use efficiency (WUEi) were performed at the end of the experiment, and the height, number of leaves and stem diameter at the beginning and at the end. Generally plants subjected to salinity of irrigation water of 3.1 dS m-1 had the lowest values of gas exchange. Moreover, the application of biofertilizers and the interaction between this and salinity did not affect any growth variable studied except the stem length in the final phase which was influenced by salinity at 5% probability by F test. The average values of this variable were 57.22 cm and 69.65 cm when applied water ECw: 0.7 to 3.1 dS m

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