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OALib Journal期刊

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Algumas considera es sobre a síntese de grandes feridas com tira elástica Some considerations on "synthesis of large wounds of the body wall with rubber elastic band"
Rafael Denadai
ABCD. Arquivos Brasileiros de Cirurgia Digestiva (S?o Paulo) , 2012, DOI: 10.1590/s0102-67202012000100018
Abstract:
Determina??o do limiar anaeróbio em jogadores de futebol com paralisia cerebral e nadadores participantes da paraolimpíada de Sidney 2000
Denadai, Benedito Sérgio;
Revista Brasileira de Medicina do Esporte , 2002, DOI: 10.1590/S1517-86922002000300009
Abstract: the objectives of this study were: a) to determine the anaerobic threshold (ant) in soccer players with cerebral palsy and swimmers participant in the sidney 2000 paralympic games and; b) to analyze the behavior of the ant according to the class of the disabled athletes. 28 disabled athletes participated in the study: 11 soccer players with cerebral palsy (class: f36, f37 and f38) and 17 swimmers (14 men and three women) (class: s1 to s10 and b1). in soccer players, the ant was determined by an incremental and intermittent protocol in a treadmill. the ant was identified as the speed corresponding to 3.5 mm of blood lactate. in swimming, the ant was determined by an incremental and intermittent protocol of 3 x 200 m. after each bout, there was blood collection, and by linear interpolation, the speed corresponding to 4 mm (ant) was calculated. the maximal aerobic speed (vamax) and the speed corresponding to the ant presented a trend of improvement as of the class of the soccer player with cerebral palsy increased. however, the ratio between the speed of ant/vamax (approximately 80%) was similar between the classes. in swimming, the speed corresponding to 4 mm increased along with the class, indicating the limitation of functional capacity of the lowest class. however, the lactate concentrations in each percentage of maximal speed of 200 m was very similar between classes, and also that observed in able-bodied swimmers. it can be concluded that the class (and therefore the disability level) interferes in the aerobic functional capacity of disabled athletes. however, the blood lactate response to the submaximal exercise is similar between classes and also to the able-bodied athletes, suggesting the validity of the ant for aerobic evaluation of swimmers and soccer players with cerebral palsy.
Daily activity of four tropical intertidal hermit crabs from Southeastern Brazil
Turra, A.;Denadai, M. R.;
Brazilian Journal of Biology , 2003, DOI: 10.1590/S1519-69842003000300020
Abstract: this study describes the daily activity in a simulated high tide situation of four species of hermit crabs (pagurus criniticornis, clibanarius antillensis, c. sclopetarius, and c. vittatus) that coexist in an intertidal flat in southeastern brazil. observations were done in two-hour intervals during two subsequent days (48 h) in three replicate pools with thirty crabs each. among species (between and within genera) there was an evident variation in activity patterns, of which three could be distinguished. the circadian activity patterns of c. antillensis and c. vittatus could be characterized as evening and nocturnal, with resting peaks during the morning and afternoon. the circadian activity pattern of c. sclopetarius was characterized by two marked peaks of inactivity, corresponding to dawn and evening, which could represent an intrinsic association with the semi-lunar tidal cycles of the study area. pagurus criniticornis showed high activity not influenced by day/night conditions during the entire observed period. these activity pattern variations of the studied hermit crabs should be taken into account in designing further experiments. more precise and accurate interspecific behavioral comparisons among species could be achieved in nocturnal experiments, the high activity period of all species.
Microhabitat use by two rocky shore gastropods in an intertidal sandy substrate with rocky fragments
Turra, A.;Denadai, M. R.;
Brazilian Journal of Biology , 2006, DOI: 10.1590/S1519-69842006000200017
Abstract: sandy beaches in some areas of the s?o sebasti?o channel in southeastern brazil have unremittingly undergone a variety of impacts, including the deposition of rock fragments in the intertidal region. consequently, these environments support a rich fauna comprising both sandy beach and rocky shore organisms. two rocky shore gastropods, tegula viridula and morula nodulosa, are particularly abundant in such environments. an evaluation of the use of microhabitats by these two species revealed that they occupy the available microhabitats in different proportions and the presence of one species is associated with the absence of the other. morula nodulosa is randomly dispersed, occupying mostly areas with rock fragments covered with sediment and branching brown algae. tegula viridula shows a clumped dispersion associated with the patchiness of the microhabitats used: the presence of encrusting green algae and absence of sediment and branching brown algae covering the rocks. these findings suggest t. viridula has a lower tolerance than m. nodulosa to sand inundation of the rocky fragments, a stochastic event common to the environment in question.
Substrate use and selection in sympatric intertidal hermit crab species
TURRA, A.;DENADAI, M. R.;
Brazilian Journal of Biology , 2002, DOI: 10.1590/S1519-69842002000100013
Abstract: coexisting hermit crabs may competitively interact for shells and microhabitats, mainly when shell availability is habitat-related. three species of clibanarius (c. antillensis, c. sclopetarius, and c. vittatus) coexist in the intertidal region of pernambuco islet, ara?á region, s?o sebasti?o channel, southeastern brazil. this study evaluated crab preferences for four substrate types used by these species in nature (rocky shore, pebbles, sand, and mud) in allopatric (single species) and sympatric (three species) treatments in simulations of high tide and low tide. the substrate preference of the three hermit crabs did not vary between low and high tide situations. at low tide the crabs either moved into holes in the highly complex rocky substrate or buried themselves in mud. substrate selection may explain the patterns of substrate use in nature only for c. vittatus. clibanarius antillensis and c. sclopetarius showed closer similarities in the pattern of substrate selection in the sympatric treatment with the substrate use in nature than in allopatric treatment, indicating a positive influence (dependence) of the presence of one species on the presence of another. use of sub-optimal substrates, mainly by c. antillensis, may be caused by other factors such as its low desiccation tolerances. if competition for space takes place among these species, it would be more intense between c. sclopetarius and c. vittatus given their higher overlap in substrate preference than between them and c. antillensis.
Daily activity of four tropical intertidal hermit crabs from Southeastern Brazil
Turra A.,Denadai M. R.
Brazilian Journal of Biology , 2003,
Abstract: This study describes the daily activity in a simulated high tide situation of four species of hermit crabs (Pagurus criniticornis, Clibanarius antillensis, C. sclopetarius, and C. vittatus) that coexist in an intertidal flat in southeastern Brazil. Observations were done in two-hour intervals during two subsequent days (48 h) in three replicate pools with thirty crabs each. Among species (between and within genera) there was an evident variation in activity patterns, of which three could be distinguished. The circadian activity patterns of C. antillensis and C. vittatus could be characterized as evening and nocturnal, with resting peaks during the morning and afternoon. The circadian activity pattern of C. sclopetarius was characterized by two marked peaks of inactivity, corresponding to dawn and evening, which could represent an intrinsic association with the semi-lunar tidal cycles of the study area. Pagurus criniticornis showed high activity not influenced by day/night conditions during the entire observed period. These activity pattern variations of the studied hermit crabs should be taken into account in designing further experiments. More precise and accurate interspecific behavioral comparisons among species could be achieved in nocturnal experiments, the high activity period of all species.
Substrate use and selection in sympatric intertidal hermit crab species
TURRA A.,DENADAI M. R.
Brazilian Journal of Biology , 2002,
Abstract: Coexisting hermit crabs may competitively interact for shells and microhabitats, mainly when shell availability is habitat-related. Three species of Clibanarius (C. antillensis, C. sclopetarius, and C. vittatus) coexist in the intertidal region of Pernambuco Islet, Ara á Region, S o Sebasti o Channel, southeastern Brazil. This study evaluated crab preferences for four substrate types used by these species in nature (rocky shore, pebbles, sand, and mud) in allopatric (single species) and sympatric (three species) treatments in simulations of high tide and low tide. The substrate preference of the three hermit crabs did not vary between low and high tide situations. At low tide the crabs either moved into holes in the highly complex rocky substrate or buried themselves in mud. Substrate selection may explain the patterns of substrate use in nature only for C. vittatus. Clibanarius antillensis and C. sclopetarius showed closer similarities in the pattern of substrate selection in the sympatric treatment with the substrate use in nature than in allopatric treatment, indicating a positive influence (dependence) of the presence of one species on the presence of another. Use of sub-optimal substrates, mainly by C. antillensis, may be caused by other factors such as its low desiccation tolerances. If competition for space takes place among these species, it would be more intense between C. sclopetarius and C. vittatus given their higher overlap in substrate preference than between them and C. antillensis.
Proposal of a synthetic ethylene-vinyl acetate bench model for surgical foundations learning: suture training
Bastos, érika Malheiros;Silva, Rafael Denadai Pigozzi;
Acta Cirurgica Brasileira , 2011, DOI: 10.1590/S0102-86502011000200014
Abstract: due to ethical and legal aspects involved in the handling of cadavers and animals the synthetic simulators are an alternative for learning how to suture technique plus the practice of various procedures such as incision and surgical flap. in this context, this paper describes and propose the use of a synthetic model manufactured from plates of ethylene-vinyl acetate (eva) to teach primary surgical skills in medical students with no previous exposure to surgery. the model that provides the convenience of being easily reproducible, allowing the students in training can thus improve their skills before applying the technique in clinical practice.
Validade das equa??es preditivas da frequência cardíaca máxima para crian?as e adolescentes
Machado, Fabiana Andrade;Denadai, Benedito Sérgio;
Arquivos Brasileiros de Cardiologia , 2011, DOI: 10.1590/S0066-782X2011005000078
Abstract: background: there are no studies in the literature to validate equations that predict maximum heart rate (hrmax) in children and adolescents. objective: to analyze the validity of the hrmax predictive equations "220 - age" and "208 - (0.7 x age)" in boys aged 10 and 16. methods: a progressive maximal exertion test was carried out in 69 apparently healthy boys aged 10 to 16. the initial test velocity was 9 km/h, with 1-km/h increments every three minutes. the test was maintained until maximum voluntary exertion was achieved, considering hrmax as the highest heart rate attained during the test. the measured hrmax was compared with the values predicted by the "220 - age" and "208 - (0.7 x age)" equations, using anova for repeated measures. results: the mean values of hrmax (bpm) were: 200.2 ± 8.0 (measured), 207.4 ± 1.5 ("220 - age") and 199.2 ± 1.1 ("208 - (0.7 x age)"). the hrmax predicted by the "220 - age" equation was significantly higher (p < 0.001) than the measured hrmax and the hrmax predicted by the ("208 - (0.7 x age)") equation. the correlation between the measured hrmax and age was not statistically significant (r = 0.096; p > 0.05). conclusion: the "220 - age" equation overestimated the measured hrmax and was not valid for this population. the "208 - (0.7 x age)" equation was valid for this population, showing results that were quite similar to those of measured hrmax. future studies with larger sample sizes can verify whether the hrmax does not depend on age for this population, a situation in which the constant 200 bpm value would be more appropriate for hrmax.
Influência das variáveis antropométricas nas respostas cardiorrespiratórias de crian?as durante o esfor?o
Machado, Fabiana Andrade;Denadai, Benedito Sérgio;
Revista Brasileira de Cineantropometria & Desempenho Humano , 2011, DOI: 10.5007/1980-0037.2011v13n5p378
Abstract: the objective of this study was to evaluate the influence of different body sizes on the cardiorespiratory responses of 10-13-year-old boys during the stages of a maximum-effort incremental test. twenty boys underwent a continuous maximal incremental test on a cycle ergometer at an initial power output of 30 w and subsequent increases of 30 w at intervals of 3 min. respiratory variables were assessed with a metabolic gas analyzer on a breath-by-breath basis. heart rate was monitored continuously during the test. the groups were divided a posteriori according to maximal work output in the incremental test (90 or 120 w) and according to body weight (> 45 or < 45 kg). the following variables were continuously measured: respiratory frequency, tidal volume, ventilation, absolute and relative oxygen uptake, carbon dioxide production, heart rate, and ventilatory equivalent for oxygen. the anthropometric variables, especially height and body weight, were closely associated with the cardiorespiratory responses. these variables are limiting and determinant factors of performance and need to be included in the prescription and practice of physical exercise for this pediatric population.
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