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Search Results: 1 - 10 of 197397 matches for " Rita de Cassia Macedo dos Santos "
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Cytokines and Oxidative Stress Status Following a Handball Game in Elite Male Players
Douglas Popp Marin,Rita de Cassia Macedo dos Santos,Anaysa Paola Bolin,Beatriz Alves Guerra,Elaine Hatanaka,Rosemari Otton
Oxidative Medicine and Cellular Longevity , 2011, DOI: 10.1155/2011/804873
Abstract: Background. Handball is considered an intermittent sport that places an important stress on a player's aerobic and anaerobic metabolism. However, the oxidative stress responses following a handball game remain unknown. We investigated the responses of plasma and erythrocyte antioxidant system and oxidative stress biomarkers following a single handball game. Methods. Fourteen male elite Brazilian handball athletes were recruited in the present study. Blood samples were taken before, immediately, and 24 hours after the game. Results. After the game and during 24 hours of recovery, the concentration of all oxidative stress indices changed significantly in a way indicating increased oxidative stress in the blood (thiol groups and reduced glutathione decreased, whereas TBARS and plasma antioxidant capacity was increased) as well as in erythrocyte (increased levels of TBARS and protein carbonyls). Erythrocyte antioxidant enzyme activities were also significantly changed by handball. Muscle damage indices (creatine kinase and lactate dehydrogenase) increased significantly after exercise. In addition, IL-6 increased after the game, whereas TNF-α decreased during recovery. Conclusion. This study demonstrates that a single handball game in elite athletes induces a marked state of oxidative stress evidenced by the oxidative modification in plasma and erythrocyte macromolecules, as well as by changes in the enzymatic and nonenzymatic antioxidant system.
Cytokines and Oxidative Stress Status Following a Handball Game in Elite Male Players
Douglas Popp Marin,Rita de Cassia Macedo dos Santos,Anaysa Paola Bolin,Beatriz Alves Guerra,Elaine Hatanaka,Rosemari Otton
Oxidative Medicine and Cellular Longevity , 2011, DOI: 10.1155/2011/804873
Abstract: Background. Handball is considered an intermittent sport that places an important stress on a player's aerobic and anaerobic metabolism. However, the oxidative stress responses following a handball game remain unknown. We investigated the responses of plasma and erythrocyte antioxidant system and oxidative stress biomarkers following a single handball game. Methods. Fourteen male elite Brazilian handball athletes were recruited in the present study. Blood samples were taken before, immediately, and 24 hours after the game. Results. After the game and during 24 hours of recovery, the concentration of all oxidative stress indices changed significantly in a way indicating increased oxidative stress in the blood (thiol groups and reduced glutathione decreased, whereas TBARS and plasma antioxidant capacity was increased) as well as in erythrocyte (increased levels of TBARS and protein carbonyls). Erythrocyte antioxidant enzyme activities were also significantly changed by handball. Muscle damage indices (creatine kinase and lactate dehydrogenase) increased significantly after exercise. In addition, IL-6 increased after the game, whereas TNF-α decreased during recovery. Conclusion. This study demonstrates that a single handball game in elite athletes induces a marked state of oxidative stress evidenced by the oxidative modification in plasma and erythrocyte macromolecules, as well as by changes in the enzymatic and nonenzymatic antioxidant system. 1. Introduction Sport training involves repeated bouts of exercise and high volume of physically demanding practice sessions and competitive games, which may lead to decline on performance, oxidative stress, and inflammation [1, 2]. In fact, an exercise stimulus has been well recognized to induce the production of reactive oxygen and nitrogen species (RONS) [2, 3]. In spite of RONS having an essential role as signalling molecules in several cellular pathways, the imbalance in the pro- and antioxidant status can lead to detrimental effect on cellular loss of redox homeostasis and oxidative damage in lipids, proteins, and DNA [3]. In addition, an excessive amount of RONS plays a detrimental role in exercise performance through shifting contractile function or muscle acute fatigue [4]. Regular exercise training has been associated with upregulation of the antioxidant system capacity to cope with the increase of RONS production. For this reason, pro-oxidant response of elite athletes to an acute exercise stimulus can be usually blunted [3]. Most of the studies regarding exercise-induced oxidative stress were carried out
Breeding sites of Neotropical Drosophilidae (Diptera): IV. living and fallen flowers of Sessea brasiliensis and Cestrum spp. (Solanaceae)
Santos, Rita de Cassia Oliveira dos;Vilela, Carlos Ribeiro;
Revista Brasileira de Entomologia , 2005, DOI: 10.1590/S0085-56262005000400015
Abstract: the flowering phenologies of sessea brasiliensis and three species of cestrum (c. amictum, c. schlechtendalii and c. sendtnerianum), all belonging to the solanaceae, were monitored in a fragment of the montane atlantic rain forest within s?o paulo city from july 1993 through june 1995. a total of 11,021 flies belonging to five species of the flavopilosa group of drosophila (d. cestri, d. cordeiroi, d. hollisae, d. incompta and d. mariaehelenae), plus 1,244 flies belonging to four species of zygothrica (z. dispar, z. vittimaculosa, z. vittinubila and z. aff. vittipunctata) emerged from 33,955 sampled flowers. cestrum amictum, c. sendtnerianum and sessea brasiliensis are recorded for the first time as host plants for the species of the neotropical flavopilosa group ofdrosophila. additionally, at least ten less abundant taxa belonging also to the drosophilidae, plus 1,073 microhymenopteran parasitoids (braconidae, eucoilidae, and pteromalidae), emerged from the sampled flowers of s. brasiliensis e cestrum spp. the present study raised from nine to eleven the number of species of cestrum previously recorded as breeding sites for these flies. a comprehensive list of species of solanaceae known to host six species of drosophila and four species of zygothrica in southeastern and southern brazil is included.
Densidade populacional de Pratylenchus spp. em pastagens de Brachiaria spp. e sua influência na disponibilidade e na qualidade da forragem Population density of Pratylenchus spp. in pastures of Brachiaria spp. and its influence on the forage availability and quality
Cassia de Carvalho,Celso Dornelas Fernandes,Jaime Maia dos Santos,Manuel Claudio Motta Macedo
Revista Ceres , 2013,
Abstract: Objetivando avaliar a densidade populacional de Pratylenchus brachyurus e Pratylenchus zeae, associados à Brachiaria brizantha, B. decumbens e B. humidicola, e sua influência na disponibilidade e na qualidade da forragem, realizou-se este trabalho. O experimento foi conduzido na Agropecuária Hisaeda, em Terenos, MS. Coletaram-se amostras de solo, raízes e parte aérea, em dez repeti es ao acaso, de 1 m2 cada, dos seguintes tratamentos: Bom, Intermediário e Ruim, caracterizados visualmente, considerando-se a percentagem de material verde das plantas. As densidades de P. brachyurus e P. zeae foram avaliadas nas amostras de solo e raízes. Na parte aérea, avaliou-se a disponibilidade de matéria seca dos materiais verde, morto e da rebrota, estado nutricional das plantas e qualidade da forragem. A fertilidade do solo foi determinada em todas as unidades amostrais. Ambos os nematoides foram identificados em todas as amostras, com maior número nas raízes (entre 87-311 P. brachyurus e 1-61 P. zeae.10 g-1) que no solo (de 0-8 P. brachyurus a 1-39 P. zeae.200 cm-3), no entanto, n o houve diferen as significativas, na quantidade de espécimes, entre os tratamentos. Considerando-se que essas forrageiras s o perenes e hospedam Pratylenchus spp., há tendência ao aumento da popula o desses patógenos, ao longo do tempo, podendo se tornar um sério problema fitossanitário. The aim of this work was to evaluate the population density of Pratylenchus brachyurus and Pratylenchus zeae associated with Brachiaria brizantha, B. decumbens and B. humidicola and their influence on forage availability and quality. The experiment was conducted in the Hisaeda Farm, Terenos, MS, Brazil. Soil, roots and plant aerial part were harvest, with ten replications each, in one square meter randomized sets encompassing three treatments: Good, Intermediary and Bad, visually characterized, considering the percentage of green material. P. brachyurus and P. zeae density were evaluated in soil and plant roots. Dry matter of green, dead and re-growth materials, plant nutritional status and forage quality were assessed in the aerial plant part. Soil fertility was determined in all harvested samples. Both nematode species were identified from all samples, with a larger number in the roots (between 87-311 P. brachyurus and 1-61 P. zeae.10 g-1) than in the soil (0-8 P. brachyurus and 1-39 P. zeae.200 cm-3), however, no significant differences were found in the number of specimens between treatments. Considering that these forage species are perennial and host Pratylenchus spp, there is a tendency to incre
Origin of the hemoglobin S gene in a northern Brazilian population: the combined effects of slave trade and internal migrations
Pante-de-Sousa Gabriella,Mousinho-Ribeiro Rita de Cassia,Santos Eduardo José Melo dos,Zago Marco Antonio
Genetics and Molecular Biology , 1998,
Abstract: We analyzed DNA polymorphisms in the b-globin gene cluster of 30 sickle cell anemia patients from Belém, the capital city of the State of Pará, in order to investigate the origin of the bS mutation. Sixty-seven percent of the bS chromosomes were Bantu type, 30% were Benin type, and 3% were Senegal type. The origin of the bS mutation in this population, estimated on the basis of bS-linked haplotypes, contradicts the historical records of direct slave trade from Africa to the northern region of Brazil. Historical records indicate a lower percentage of people from Benin. These discrepancies are probably due to domestic slave trade and later internal migrations, mainly from northeastern to northern regions. Haplotype distribution in Belém did not differ significantly from that observed in other Brazilian regions, although historical records indicate that most slaves from Atlantic West Africa, where the Senegal haplotype is prevalent, were destined for the northern region, whereas the northeast (Bahia, Pernambuco and Maranh o) was heavily supplied with slaves from Central West Africa, where the Benin haplotype predominates.
Diagnosis of the human fetal age based on the development of the normal kidney
Lizardo-Daudt, Helena Maria;Edelweiss, Maria Isabel Albano;Santos, Fernanda Teixeira dos;Schumacher, Rita de Cassia Alves;
Jornal Brasileiro de Patologia e Medicina Laboratorial , 2002, DOI: 10.1590/S1676-24442002000200010
Abstract: background and aims: the diagnosis of human fetal age is usually estimated based on the measurement of crown-rump length or crown-heel length and the weight of the fetus. however, this estimate is not totally accurate and sometimes is necessary to combine other data to determine the fetal age. an analysis of the normal embryological development of the kidney may assist in this determination. the histology of this process, although well described, lacks photographic documentation. we intend to fill this gap by providing histologists and pathologists, especially inexperienced ones, with information about the staging of the renal development through microphotography. the objective of the present study was to achieve greater accuracy for the diagnosis of human fetal age through the proposed classification and the photographic documentation presented. material and methods: normal embryological development of the human kidney was studied by light microscopy. the fetal period from 6 to 40 weeks of gestation was observed according the stage of maturity of glomeruli and tubules; localization of glomeruli, occurrence of nephrogenic tissue and cortico-medullary differentiation. at least 5 different exams were observed from each week of development. two hundred four exams were analyzed in the whole study. the histological characteristics were quantified and the process was documented by microphotography. results and final considerations: the fetal development of the kidney was divided into 8 stages, which was documented through microphotography. nephron structural formation occurred until the 34th week of prenatal development. from the 35th week on, tubules and glomeruli continued to mature without the formation of new nephrons. the proposed classification intends to improve the accuracy of the fetal age diagnosis.
Diagnosis of the human fetal age based on the development of the normal kidney
Lizardo-Daudt Helena Maria,Edelweiss Maria Isabel Albano,Santos Fernanda Teixeira dos,Schumacher Rita de Cassia Alves
Jornal Brasileiro de Patologia e Medicina Laboratorial , 2002,
Abstract: Background and aims: The diagnosis of human fetal age is usually estimated based on the measurement of crown-rump length or crown-heel length and the weight of the fetus. However, this estimate is not totally accurate and sometimes is necessary to combine other data to determine the fetal age. An analysis of the normal embryological development of the kidney may assist in this determination. The histology of this process, although well described, lacks photographic documentation. We intend to fill this gap by providing histologists and pathologists, especially inexperienced ones, with information about the staging of the renal development through microphotography. The objective of the present study was to achieve greater accuracy for the diagnosis of human fetal age through the proposed classification and the photographic documentation presented. Material and methods: Normal embryological development of the human kidney was studied by light microscopy. The fetal period from 6 to 40 weeks of gestation was observed according the stage of maturity of glomeruli and tubules; localization of glomeruli, occurrence of nephrogenic tissue and cortico-medullary differentiation. At least 5 different exams were observed from each week of development. Two hundred four exams were analyzed in the whole study. The histological characteristics were quantified and the process was documented by microphotography. Results and final considerations: The fetal development of the kidney was divided into 8 stages, which was documented through microphotography. Nephron structural formation occurred until the 34th week of prenatal development. From the 35th week on, tubules and glomeruli continued to mature without the formation of new nephrons. The proposed classification intends to improve the accuracy of the fetal age diagnosis.
Condi es higiênico-sanitárias no comércio ambulante de alimentos em Pelotas-RS
Rodrigues Kelly Lameiro,Gomes Juliana Pinto,Concei??o Rita de Cassia dos Santos da,Brod Claudiomar Soares
Ciência e Tecnologia de Alimentos , 2003,
Abstract: O comércio de alimentos prontos para o consumo por vendedores ambulantes pode constituir um alto risco para a saúde dos consumidores, visto que as pessoas envolvidas nesta atividade geralmente n o tem preparo para a manipula o correta de alimentos. Neste trabalho foram investigadas as condi es de preparo e a qualidade higiênico-sanitária de lanches comercializados por vendedores ambulantes em Pelotas. Foram colhidas de 60 estabelecimentos, uma amostra de água, uma da superfície de manuseio e um lanche (cachorro-quente). Nos cachorros-quentes foram realizadas contagens de bactérias aeróbias mesófilas (BAM), Staphylococcus coagulase positiva (STA), coliformes totais (CT), coliformes a 45masculineC (CF), e investigada a presen a de Salmonella sp. Na água e superfície foram realizadas contagens de BAM, CT e CF. Entre as 60 amostras de cachorros-quentes analisadas, 53%, 48%, 37% e 25% estavam fora do padr o para CT, BAM, STA e CF, respectivamente. Em nenhuma amostra foi detectada a presen a de Salmonella. As amostras de água apresentaram apenas 3 (5%) amostras fora do padr o para BAM, e 27% e 23% fora do padr o para CT e CF, respectivamente. Em rela o às superfícies, 70% foram consideradas insatisfatórias para contagem de BAM e 68% e 67% para CT e CF. Os resultados sugerem que as condi es higiênicas existentes em muitos estabelecimentos n o s o adequadas, o que se reflete em uma propor o relativamente alta de lanches com qualidade microbiológica insatisfatória para o consumo.
DETEC O DE FUNGOS PATOGêNICOS EM SEMENTES DE ACáCIA-NEGRA (Acacia mearnsii De Wild)
Flávia Elise Meneghini dos Santos,Rita de Cassia Sobrosa,Ivan Francisco D. Costa,Maisa Pimentel Martins Corder
Ciência Florestal , 2000,
Abstract: A presen a de fungos pode reduzir a capacidade germinativa de um lote de sementes, causar a morte de plantulas ou transmitir doen as para plantas adultas. é necessário conhecer os agentes, as causas e as conseqüências decorrentes da contamina o por fungos patogênicos. Desse modo, o presente estudo teve como objetivo identificar os fungos associados às sementes de Acacia mearnsii De Wild, armazenadas a 5°C, por um período de 12 meses. Foram utilizadas sementes de acácia-negra oriundas de plantio comercial, aos 4 anos de idade cuja procedência é áfrica do Sul. As sementes foram colhidas em três épocas distintas: (i) quando com frutos verdes e/ou pigmentados; (ii) quando com frutos negros e início de abertura das vagens; (iii) quando com sementes coletadas no solo, após a dispers o natural, sendo empregadas como testemunha. Os fungos associados às sementes foram: Botryodiplodia sp., Botrytis sp. (família Moniliaceae), Cladosporium sp.(família Dematiaceae), Cylindrocladium sp., Fusarium sp., Penicillium sp., Pestalotia sp., Rhizoctonia sp., Trichoderma sp. e outros fungos n o identificados. De maneira geral, a autoclavagem das sementes promoveu maiores taxas de germina o e a elimina o de fungos associados. As sementes, que apresentaram maior contamina o por fungos, foram aquelas oriundas da coleta no solo. Os fungos de solo observados, que poderiam ocasionar danos em plantulas no viveiro e, simultaneamente, estarem associados à gomose em acácia-negra, foram: Botrytis sp., Cylindrocladium sp.
Bovine papillomavirus type 2 in reproductive tract and gametes of slaughtered bovine females
Carvalho, Claudemir de;Freitas, Antonio Carlos de;Brunner, Olga;Góes, Luiz Gustavo Bentim;Cavalcante, Andréa Yaguiu;Be?ak, Willy;Santos, Rita de Cassia Stocco dos;
Brazilian Journal of Microbiology , 2003, DOI: 10.1590/S1517-83822003000500028
Abstract: papillomaviruses are described selectively infecting epithelial tissues and are associated with many forms of cancer in different species. considering the widespread dissemination of papillomatosis in livestock, interest is being centred on possible forms of viral transmission and respective mechanisms. in the present study, we report the detection of bovine papillomavirus (bpv) dna sequences in female reproductive tract tissues, fluids and oocytes from slaughtered bovines not afflicted by cutaneous papillomatosis. bpv-2 dna sequences were found in ovarian and uterine tissues as well as in oocytes, cumulus cells and uterine flushings. the presence of papillomavirus sequences in reproductive organ tissues and fluids shows that viral infection in organisms can be verified in others tissues, not only in epithelial ones. the present findings alert to the possibility of bpv transmission in embryo transfer programs and assisted fertilization procedures.
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