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Search Results: 1 - 10 of 19732 matches for " Alberto Domingues;Gasparetto "
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Canceriza??o de lóbulos: correla??o de achados mamográficos e histológicos
Vianna, Alberto Domingues;Gasparetto, Taísa Davaus;Torres, Gisela Costa;Saddy, José Carlos;Marchiori, Edson;
Radiologia Brasileira , 2011, DOI: 10.1590/S0100-39842011000500003
Abstract: objective: to characterize the mammographic appearance of cancerization of lobules by ductal carcinoma in situ (dcis), by correlating imaging and histological findings. materials and methods: this retrospective study was based on a review of the histopathological reports of 135 patients who underwent breast biopsy. a diagnosis of cancerization of lobules by dcis was confirmed in 12 patients. two cases were excluded because the histopathological sections were not available to correlate pathological and mammographic findings. all mammograms were retrospectively reviewed and categorized by two experienced breast radiologists, with no knowledge of the histological findings. results: nine cases (90%) presented clusters of round microcalcifications, and one (10%) had round and linear calcifications. the distribution of the calcifications was defined as lobular in all the cases. histopathological study showed four cases of cribriform dcis, two cases of comedo dcis, one case of solid dcis, one case of cribriform associated with solid dcis, and one case of cribriform associated with solid and comedo dcis. in the case showing round and linear calcifications, the histological subtype was cribriform dcis. with respect to the number of microcalcifications, nine cases presented more than 20, and only one case showed less than 10 microcalcifications. conclusion: in our cohort, the mammographic evaluation of patients with dcis presenting cancerization of lobules demonstrated clusters of microcalcifications in a lobular distribution. although clusters of round calcifications are typically associated with a benign process, cancerization of lobules by dcis may produce a similar pattern, thus mimicking a benign condition.
Diffusion-weighted MR images and pineoblastoma: diagnosis and follow-up
Gasparetto, Emerson L.;Cruz Jr, L. Celso Hygino da;Doring, Thomas M.;Araújo, Bertha;Dantas, Mário Alberto;Chimelli, Leila;Domingues, Romeu C.;
Arquivos de Neuro-Psiquiatria , 2008, DOI: 10.1590/S0004-282X2008000100015
Abstract: pineoblastomas are uncommon pineal tumors, which demonstrate rapid growing and poor prognosis. we report the case of a 43-year-old man with an enhancing pineal region mass, which showed restriction of the diffusion on diffusion-weighted (dw) mr images. the surgical biopsy defined the diagnosis of pineoblastoma and the therapy was initiated with radiation and chemotherapy. three months later, the follow-up mr imaging showed areas suggestive of necrosis and the dw images demonstrate no significant areas of restricted diffusion. the differential diagnosis of pineal region masses that could show restriction of diffusion is discussed.
Calcifica es malignas da mama: correla o mamografia-anatomia patológica
Vianna Alberto Domingues
Radiologia Brasileira , 2001,
Abstract:
Aplica??o da metodologia de superfície de resposta para o estudo do efeito da temperatura sobre o comportamento reológico de misturas ternárias de polpa de manga e sucos de laranja e cenoura
Branco, Ivanise Guilherme;Gasparetto, Carlos Alberto;
Ciência e Tecnologia de Alimentos , 2003, DOI: 10.1590/S0101-20612003000400031
Abstract: in this work was studied the rheological behaviour of ternaries mixtures of pulp mango, orange and carrot juices, in temperatures of 10 and 60oc. the juice proportion were defined by response surface methodology to mixture. rheological data were obtained in a haake rotovisco model rv 20 and rheograms were fitted with ostwlad- de waele. the rheological parameters were used as response for the experimental designs. it was observed that the parameters consistency index and flow behaviour index, in the two temperatures, were better described with the linear and quadratic model, respectively.
Biologia e exigências térmicas do ácaro-vermelho (Tetranychus ludeni Zacher) em folhas de algodoeiro
Silva, Carlos Alberto Domingues da;
Pesquisa Agropecuária Brasileira , 2002, DOI: 10.1590/S0100-204X2002000500001
Abstract: the objective of this work was to study the biology and thermal requirement of tetranychus ludeni zacher (acari: tetranychidae) on leaves of cotton (gossypium hirsutum l. r. latifolium (hutch)). bioclimatic chambers at 20, 23, 25, 28 and 30oc, relative humidity of 70±10%, and a 12 hours:12 hours (l:d) photoperiod were utilized. development period of eggadult, varied from 20.77 (20oc) to 8.50 days (30oc), for males and from 18.83 (20oc) to 7.75 days (30oc), for females. the threshold temperature of development, estimated by x intercession method for development period of eggadult were 14.05oc, for females and 13.91oc, for males. while those values of thermal constant estimated by réamur law were 138.34 daydegrees for females and 130.91 daydegrees for males. at 30oc of temperature, the highest values of the intrinsic rate of increase (0.418), number of eggs/females/day (3.47), fecundity (61.29), reproductive rate net (48.00), and minimum value to the mean generation time (9.27) were shown.
Sele??o de isolados de Beauveria bassiana patogênicos ao bicudo-do-algodoeiro
Silva, Carlos Alberto Domingues da;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001000200005
Abstract: the objective of this work was to screen pathogenic isolates of beauveria bassiana (balsamo) vüillemin from different hosts and geographic regions, pathogenic to the cotton boll weevil. twelve isolates were evaluated. isolates originally obtained from boll weevil showed low pathogenicity against this host. insect mortality began on the second day after inoculation by fungal suspension, ranging from 15% to 83%, with a tl50 of 5.30 to 11.06 days. variability among isolates concerning conidial germination in artificial culture medium was verified, and tg50 did not correlate with pathogenicity. one of the most virulent isolates of b. bassiana against cotton boll weevil is cg138.
Calcifica??es malignas da mama: correla??o mamografia-anatomia patológica
Vianna, Alberto Domingues;Marchiori, Edson;
Radiologia Brasileira , 2002, DOI: 10.1590/S0100-39842002000300003
Abstract: we carried out 30 comparison studies to establish the relationship between mammography and pathology findings in 29 patients with malignant breast tumors that presented calcifications associated with the lesion on the mammograms. the main purpose of this work was to verify whether the shapes of the calcifications correspond to specific types of tumor, and could be related to the location they originate from. two objective features of the calcifications observed on the mammograms were studied: shape and distribution. this study showed that carcinomas of the comedo type presented a high frequency of pleomorphic calcifications (95.5%) and a ductal distribution pattern in 66.5% of the cases. cribriform carcinomas that were not associated to the comedo type presented only round calcifications in 66.5% of the cases, prevailing an undefined distribution pattern (78.5%). micropapillary tumors that were not associated to the comedo type presented only round calcifications in 66.5% of the cases, prevailing an undefined distribution pattern (66.5%). none of the tumors showed a lobular distribution pattern. shapeless calcifications in the absence of a tumoral nodule may be suggestive of infiltrative ductal carcinoma. considering the histological architectural pattern of the 30 tumors, 24 (80%) showed the expected calcification shapes.
Efeitos da temperatura no desenvolvimento, fecundidade e longevidade de Gargaphia torresi Lima (Hemiptera, Tingidae)
Silva, Carlos Alberto Domingues da;
Revista Brasileira de Entomologia , 2004, DOI: 10.1590/S0085-56262004000400018
Abstract: the development of gargaphia torresi lima on cotton leaves was studied in bioclimatic chambers at 20, 23, 25, 28 and 30oc, relative humidity of 70±10%, and a 12h:12h (l:d) photoperiod. the incubation period varied from 11 (20oc) to 4 (30oc) days; nymphal stage of individuals that originated females and males varied from 20.8 (20oc) to 8.3 (30oc) days and from 20.8 (20oc) to 8.6 (30oc) days, respectively. development of immature stages for individuals that originated females and males varied from 31.8 (20oc) to 12.3 (30oc) days and from 31.5 (20oc) to 12.6 (30oc) days, respectively. the values of longevity and fecundity were inversely proportional with increase of the temperature. the thermal constant (k) and theoretical lower threshold temperature of development (tb) were estimated by reamur law and intercession method of the x, respectively. the theoretical lower threshold temperature of development for individuals that originated adult females and males were 13.9oc and 13.6oc, respectively. the immature stages for individuals that originated adult females and males required 209.4 and 220.3 degrees-days from oviposition to adult emergence, respectively.
Biologia e exigências térmicas do ácaro-vermelho (Tetranychus ludeni Zacher) em folhas de algodoeiro
Silva Carlos Alberto Domingues da
Pesquisa Agropecuária Brasileira , 2002,
Abstract: O objetivo deste trabalho foi estudar a biologia e as exigências térmicas de Tetranychus ludeni Zacher (Acari: Tetranychidae) em folhas de algodoeiro (Gossypium hirsutum L. r. latifolium (Hutch)). Foram utilizadas camaras climatizadas, ajustadas nas temperaturas de 20, 23, 25, 28 e 30oC, umidade relativa de 70% e fotófase de 12 horas. Os períodos de desenvolvimento de ovo a adulto variaram de 20,77 (20oC) a 8,50 dias (30oC), em fêmeas, e de 18,83 (20oC) a 7,75 dias (30oC), em machos. As temperaturasbase, estimadas pelo método da intersec o de X, para os períodos de desenvolvimento de ovoadulto, foram de 14,05oC para fêmeas e 13,91oC para machos, enquanto os valores da constante térmica estimados de acordo com a lei de Réamur foram de 138,34 grausdia, para fêmeas e 130,91 grausdia, para machos. Na temperatura de 30oC foram observados os maiores valores de raz o intrínseca de crescimento (0,418), número de ovos de fêmeas/dia (3,47), fecundidade (61,29) e taxa líquida de reprodu o (48,00) e o menor valor para o tempo médio de uma gera o (9,27).
Sele o de isolados de Beauveria bassiana patogênicos ao bicudo-do-algodoeiro
Silva Carlos Alberto Domingues da
Pesquisa Agropecuária Brasileira , 2001,
Abstract: Objetivou-se selecionar isolados de Beauveria bassiana (Balsamo) Vüillemin provenientes de diferentes hospedeiros e regi es geográficas, patogênicos ao Anthonomus grandis, o bicudo-do-algodoeiro. Foram analisados 12 isolados em condi es de laboratório. Os isolados obtidos originalmente de A. grandis foram pouco virulentos a essa praga. A mortalidade do bicudo teve início no segundo dia após a inocula o das suspens es fúngicas, variando de 15% a 83%, com TL50 entre 5,30 a 11,06 dias. Os isolados apresentaram variabilidade quanto à germina o dos conídios em meio de cultura artificial, e esta n o se correlacionou com a patogenicidade. O isolado CG138 de B. bassiana destacou-se como um dos mais virulentos ao bicudo-do-algodoeiro.
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