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Composi??o florística e estrutura comunitária da floresta de galeria do córrego da Paciência, Cuiabá, (MT)
Oliveira-Filho, Ary Teixeira de;
Acta Botanica Brasilica , 1989, DOI: 10.1590/S0102-33061989000100004
Abstract: the gallery forest which occurs along one of the branches of the córrego da paciência, southern mato grosso, brazil (15o 21's, 55o 49'w), was surveyed by 67 plots of 30m2 each (0.201 ha). individuals > 9cm in circumference at ground level were recorded. three sites of the forest were sampled: nascentes, vereda and cachoeira. phytosociological parameters were calculated for the vegetation of the whole sampled area, and of each of the forest sites. structural and floristic dissimilarity measures were obtained in a comparison among the three forest sites. floristic dissimilarity measures were also obtained in a comparison of the forest of the present study and five other riparian forests from central and southeastern brazil. the six forests were highly dissimilar in floristic composition although some of them have some abundant species in common. the three forest sites also presented high dissimilarity indexes in floristic composition and community structure. climate, soil and geomorphology of the catchment areas may be responsible for inter-regional differences among riparian forests. the intra-regional differences may be associated with variations in soil fertility, soil moisture and flood level regimes, all of which may also vary locally with topography. distinct spatial distribution patterns, clearly observed among many gallery forest species, may be ascribed to the high environmental heterogeneity which is peculiar to this vegetation type.
Photodegradation of the Molluscicidal Latex of "Crown-of-Thorns" (Euphorbia milii var hislopii)
Oliveira-Filho EC,Paumgartten FJR
Memórias do Instituto Oswaldo Cruz , 1997,
Abstract:
Cyanobacteria and Cyanotoxins: From Impacts on Aquatic Ecosystems and Human Health to Anticarcinogenic Effects
Giliane Zanchett,Eduardo C. Oliveira-Filho
Toxins , 2013, DOI: 10.3390/toxins5101896
Abstract: Cyanobacteria or blue-green algae are among the pioneer organisms of planet Earth. They developed an efficient photosynthetic capacity and played a significant role in the evolution of the early atmosphere. Essential for the development and evolution of species, they proliferate easily in aquatic environments, primarily due to human activities. Eutrophic environments are conducive to the appearance of cyanobacterial blooms that not only affect water quality, but also produce highly toxic metabolites. Poisoning and serious chronic effects in humans, such as cancer, have been described. On the other hand, many cyanobacterial genera have been studied for their toxins with anticancer potential in human cell lines, generating promising results for future research toward controlling human adenocarcinomas. This review presents the knowledge that has evolved on the topic of toxins produced by cyanobacteria, ranging from their negative impacts to their benefits.
Composi??o florística e estrutura fitossociológica de uma floresta ripária em Itutinga, MG, e compara??o com outras áreas
VAN DEN BERG, EDUARDO;OLIVEIRA-FILHO, ARY T.;
Brazilian Journal of Botany , 2000, DOI: 10.1590/S0100-84042000000300002
Abstract: the floristic composition and phytosociological structure were investigated in an area of 7.55 ha of a riparian forest in itutinga, state of minas gerais, southeastern brazil. this forest locates alongside a narrow creek, and is sharply bounded by montane grasslands. the phytosociological survey was done on 28 plots of 10 x 30 m where all individuals with diameter at the base of the trunk equal to or larger than 5 cm were recorded and had their diameter measured and height estimated. the floristic survey was based on specimens collected both in and outside the plots. the study area was compared with other forests of s?o paulo and minas gerais states using multivariate analyses. the floristic survey recorded 162 species and 54 families. the forests with flora most similar to the study area were those in the same region (upper rio grande). we suggest rainfall seasonality and altitude as the variables most strongly influencing the floristic differences among the forests compared. the phytosociological survey recorded 2145 individuals in 141 species. the highest structural similarities occurred with forests in itutinga and bom sucesso, followed by madre de deus and po?o bonito. we suggest differences and similarities in soil properties, topographic features and the occurrence of seasonal floods as the main variables influencing the pattern of similarity observed.
Perfil florístico e estrutura da comunidade arbórea de uma floresta de vale no Parque Nacional da Chapada dos Guimar?es, Mato Grosso, Brasil
PINTO, JOSé ROBERTO RODRIGUES;OLIVEIRA-FILHO, ARY TEIXEIRA DE;
Brazilian Journal of Botany , 1999, DOI: 10.1590/S0100-84041999000100008
Abstract: the purpose of the present study was to describe the floristic composition and the structure of the arboreal community of a valley-forest in véu de noiva waterfalls, chapada dos guimar?es national park, mato grosso, brazil. the floristic and phytosociological analyses aimed at assessing, respectively: (a) the influence of the main brazilian phytogeographic provinces on the floristic composition of the valley-forest studied, and (b) the role of the most important tree species in terms of abundance, ecological group, and stature at maturity. every tree with stalk circumference at breast height (cbh) 3 15 cm found within 36 quadrats of 30 x 10 m was sampled. 172 species of trees belonging to 133 genera and 61 families were registered. the floristic profile showed strong links with both the amazonian and atlantic (sensu lato) forests, reinforcing the transitional nature of that community. the most important tree species, in terms of value of importance, were also important in other surveys carried out in the region.
Human exposure to potential rabies virus transmitters in Olinda, State of Pernambuco, between 2002 and 2006
Dantas-Torres, Filipe;Oliveira-Filho, Edmilson Ferreira de;
Revista da Sociedade Brasileira de Medicina Tropical , 2007, DOI: 10.1590/S0037-86822007000600003
Abstract: the aim of the present study was to evaluate the data on human exposure to potential rabies virus transmitters in olinda, state of pernambuco, brazil. data from 7,062 patients who underwent antirabies prophylactic treatment in olinda between 2002 and 2006 were analyzed. as expected, dogs and cats were involved in most of the cases; i.e. 82.3 and 16.3%, respectively. attacks by nonhuman primates, bats and other species (unspecified) were also reported. among the 7,062 patients who underwent antirabies treatment, 582 patients abandoned the treatment, either by indication from the health unit (195) or by their own decision (387). in conclusion, this study has indicated that prophylaxis for human rabies in this urban area will require a multifaceted approach, including health education, post-exposure prophylaxis, systematic vaccination for dogs and cats, and possibly selective control over wild animals such as hematophagous bats.
Perfil florístico e estrutura da comunidade arbórea de uma floresta de vale no Parque Nacional da Chapada dos Guimar es, Mato Grosso, Brasil
PINTO JOSé ROBERTO RODRIGUES,OLIVEIRA-FILHO ARY TEIXEIRA DE
Brazilian Journal of Botany , 1999,
Abstract: O propósito do presente trabalho foi descrever a composi o florística e a estrutura da comunidade arbórea da floresta de vale da queda d'água Véu de Noiva, Parque Nacional da Chapada dos Guimar es, Mato Grosso, Brasil. A análise florística e fitossociológica procurou avaliar, respectivamente: (a) a influência das principais províncias fitogeográficas brasileiras na composic o florística desta floresta de vale e (b) o papel das espécies mais importantes da comunidade arbórea em termos de sua abundancia, grupo ecológico e porte dos indivíduos adultos. Foram amostrados todos os indivíduos arbóreos com circunferência do caule à altura do peito (CAP) 3 15 cm contidos em 36 parcelas de 30 x10 m. Foram registradas 172 espécies arbóreas pertencentes a 133 genêros e 61 famílias. O perfil florístico apresentou fortes la os tanto com a flora Amaz nica como com a Atlantica (sensu lato), evidenciando o caráter transicional desta comunidade arbórea. As principais espécies arbóreas, em termos de valor de importancia, se repetem entre as mais abundantes em outros levantamentos realizados na regi o.
Composi o florística e estrutura fitossociológica de uma floresta ripária em Itutinga, MG, e compara o com outras áreas
VAN DEN BERG EDUARDO,OLIVEIRA-FILHO ARY T.
Brazilian Journal of Botany , 2000,
Abstract: A composi o florística e a estrutura fitossociológica foram investigadas em uma área de 7,55 ha de floresta ripária em Itutinga, MG. Essa floresta acompanha um pequeno curso d?água e tem limites bem definidos com um campo limpo montano. O levantamento fitossociológico foi realizado em 28 parcelas de 10 x 30 m, onde todos os indivíduos com diametro do tronco à altura do solo igual ou maior que 5 cm foram registrados, tendo seus diametros medidos e alturas estimadas. O levantamento florístico baseou-se em coletas dentro e fora das parcelas. Encontraram-se 162 espécies pertencentes a 54 famílias. A área de estudos foi comparada com outras florestas dos Estados de S o Paulo e Minas Gerais por meio de análises multivariadas. As áreas floristicamente mais semelhantes com a floresta estudada foram as da mesma regi o (alto rio Grande). Sugeriu-se que as variáveis mais fortemente ligadas à diferencia o florística entre as florestas comparadas sejam a estacionalidade das chuvas e a altitude. No levantamento fitossociológico, foram registrados 2145 indivíduos distribuídos em 141 espécies. As maiores semelhan as estruturais ocorreram com as florestas de Itutinga e Bom Sucesso e as maiores diferen as com Madre de Deus e Po o Bonito, diferen as que podem ser decorrentes de varia es de propriedades dos solos.
Morbidity-mortality and performance evaluation of Brahman calves from in vitro embryo production
Andreza Pimenta-Oliveira, José P Oliveira-Filho, Adriano Dias, Roberto C Gon?alves
BMC Veterinary Research , 2011, DOI: 10.1186/1746-6148-7-79
Abstract: Whilst gestation length and birth weight were significantly increased in IVP-derived calves, no difference in weaning weight was observed between groups. The passive transfer of immunity (PT), was assessed in IVP (n = 80) and AI (n = 20) groups 24 hours after birth by determination of gamma-glutamyl transferase (GGT) and gammaglobulin activity as well as by quantification of the concentration of total protein in serum. No differences in passive transfer or incidences of dystocia and diseases at weaning were observed between groups. Birth weight, method of feeding colostrum and dystocia were not correlated with PT in either group.In this study, in vitro embryo production did not affect the health status, development, or passive transfer of immunity in Brahman calves.The use of bovine in vitro embryo production (IVP) has increased in Brazil over the past several years. This procedure allows for embryos to be obtained from genetically superior cows that are no longer able to produce offspring by conventional techniques or procedures. IVP increases the reproductive potential of the cows when compared with other biotechnologies such as artificial insemination (AI) [1]. However, though IVP promotes faster genetic improvement [1], it has also been associated with a number of adverse effects such as higher embryo mortality rates, abnormal fetal growth, heavier offspring, longer gestation, abortion, preterm birth, increased genetic abnormalities and high rates of neonatal mortality [2,3].Dystocia in newborn calves can cause asphyxia and so delay onset of natural suckling, negatively affecting the passive transfer of colostral immunoglobulins [4]. Dystocia is also associated strongly with increased mortality, morbidity and with a detrimental impact on health and development from birth to weaning [5]. The failure of passive transfer causes hypogammaglobulinemia which increases the susceptibility to neonatal disease, low growth performance, and high mortality [6].The aim of thi
In vitro behaviour of endothelial cells on a titanium surface
Ana Breithaupt-Faloppa, Wothan de Lima, Ricardo Oliveira-Filho, Johannes Kleinheinz
Head & Face Medicine , 2008, DOI: 10.1186/1746-160x-4-14
Abstract: In the present investigation, we examined the behavior of human umbilical vein endothelial cells (HUVECs) harvested on titanium (Ti), using histological and immunohistochemical methods. The cells, after two passages, were seeded in a standard density on commercially plate-shaped titanium pieces, and maintained for 1, 7 or 14 days.After 14 days, we could observe a confluent monolayer of endothelial cells (ECs) on the titanium surface. Upon one-day Ti/cell contact the expression of fibronectin was predominantly cytoplasmatic and stronger than on the control surface. It was observed strong and uniform cell expression along the time of α5β1 integrin on the cells in contact with titanium.The attachment of ECs on titanium was found to be related to cellular-derived fibronectin and the binding to its specific receptor, the α5β1 integrin. It was observed that titanium effectively serves as a suitable substrate for endothelial cell attachment, growth and proliferation. However, upon a 7-day contact with Ti, the Weibel-Palade bodies appeared to be not fully processed and exhibited an anomalous morphology, with corresponding alterations of PECAM-1 localization.Since the discovery of endothelial-derived relaxing factor (EDRF) by Furchgott & Zawadzki [1], in 1980, endothelial cells (ECs) have been recognized to be involved in vascular homeostasis, angiogenesis and repair of injured tissues. ECs play an important role in the trafficking of cells from bloodstream towards an inflammatory site, chemotaxis, cell adhesion and extravasation [2]. Factors released by ECs mediate the control of vascular tonus, thrombogenesis and fibrinolysis, and platelet activities [3]. Besides, by interacting with cytokines and leukocytes, ECs orchestrate the inflammatory process [4], a fact involved with the complex phenomena observed at the host implant interface. ECs produce and store the haemosthatic protein von Willebrand factor (vWf) into granules named Weibel Palade bodies (WPBs), that are secret
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