Time filter

Source Type

Presidente Dutra, Brazil

The Universidade Federal de Rondônia is located in the state of Rondônia, in Brazil. It is the only public university in Rondônia. Wikipedia.

Women who come to give birth at the Obstetrics Center of the Hospital de Base in Porto Velho, in the Brazilian State of Rondônia are from underprivileged social groups. Wealthier women attend private clinics and give birth by way of caesarian section at a prescheduled date and time. This article addresses the question of the increase in the incidence of caesarian birth in Latin countries and also in the developed world, where this has provoked necessary and urgent bioethical discussion. It also investigates the opinions of women giving birth at the Obstetrics Center of the Hospital de Base in 2006 and 2007.

Shepard Jr. G.H.,Museu Paraense Emilio Goeldi | Ramirez H.,Federal University of Rondonia
Economic Botany | Year: 2011

"Made in Brazil": Human Dispersal of the Brazil Nut (Bertholletia excelsa, Lecythidaceae) in Ancient Amazonia. The Brazil nut, Bertholletia excelsa, is a colossal tree of terra firme forest whose seeds represent the most important non-timber forest product in Amazonia. Its peculiarly inefficient dispersal strategy and discontinuous distribution have led some to hypothesize anthropogenic origins, but evidence to date has been inconclusive. Here we present results of a multidisciplinary study addressing this question. A review of the geographic distribution of B. excelsa and comparison with that of similar Lecythis species suggest a number of anomalies that are consistent with a recent and wide colonization of Bertholletia. Published studies and field observations indicate that anthropogenic disturbance facilitates Brazil nut regeneration. Recent genetic studies showing no sequence diversity and no geographical structuring of within-population variability support a rapid and recent irradiation from an ancestral population. Historical linguistic analysis of indigenous terms for Brazil nut suggests a northern/eastern Amazonian origin for Bertholletia, with a concomitant spread of Brazil nut distribution or cultivation to the south and west. Such an expansion would have been particularly facilitated by the emergence of intensive bitter manioc cultivation and networks of interethnic trade beginning in the first millennium C. E. Together, ecological, phytogeographic, genetic, linguistic, and archeological data reinforce the hypothesis that ancient Amazonian peoples played a role in establishing this emblematic and economically important rainforest landscape. © 2011 The New York Botanical Garden.

Soares A.M.,Federal University of Rondonia
Toxicon | Year: 2014

Prof. Dr. José R. Giglio (1934-2014) made a highly significant contribution to the field of Toxinology. During 48 years devoted to research and teaching Prof Giglio published more than 160 articles, with more than 4400 citations, in international journals, trained a vast amount of graduate and undergraduate students, and developed an international network of collaborators. Throughout these years, he worked with dedication and deep commitment to science, leaving an immortalized legacy. During his professional career he contributed mostly in the isolation, and biochemical and functional characterization of various protein toxins derived from animal venoms such as snakes, scorpions and spiders, in addition to his studies searching for alternative therapies for poisoning. Even after his departure, his presence and influence remains among his former students and in the outstanding legacy of his scientific contributions.

Araujo M.D.-S.,Oswaldo Cruz Foundation | Gil L.H.S.,Oswaldo Cruz Foundation | E-Silva A.D.-A.,Oswaldo Cruz Foundation | E-Silva A.D.-A.,Federal University of Rondonia
Malaria Journal | Year: 2012

Background: The incidence of malaria in the Amazon is seasonal and mosquito vectorial capacity parameters, including abundance and longevity, depend on quantitative and qualitative aspects of the larval diet. Anopheles darlingi is a major malaria vector in the Amazon, representing >95% of total Anopheles population present in the Porto Velho region. Despite its importance in the transmission of the Plasmodium parasite, knowledge of the larval biology and ecology is limited. Studies regarding aspects of adult population ecology are more common than studies on larval ecology. However, in order develop effective control strategies and laboratory breeding conditions for this species, more data on the factors affecting vector biology is needed. The aim of the present study is to assess the effects of larval food quantity on the vectorial capacity of An. darling under laboratory conditions. Methods. Anopheles darlingi was maintained at 28°C, 80% humidity and exposed to a daily photoperiod of 12h. Larvae were divided into three experimental groups that were fed either a low, medium, or high food supply (based on the food amounts consumed by other species of culicids). Each experiment was replicated for six times. A cohort of adults were also exposed to each type of diet and assessed for several biological characteristics (e.g. longevity, bite frequency and survivorship), which were used to estimate the vectorial capacity of each experimental group. Results: The group supplied with higher food amounts observed a reduction in development time while larval survival increased. In addition to enhanced longevity, increasing larval food quantity was positively correlated with increasing frequency of bites, longer blood meal duration and wing length, resulting in greater vectorial capacity. However, females had greater longevity than males despite having smaller wings. Conclusions: Overall, several larval and adult biological traits were significantly affected by larval food availability. Greater larval food supply led to enhance larval and production and larger mosquitoes with longer longevity and higher biting frequency. Thus, larval food availability can alter important biological traits that influence the vectorial capacity of An. darlingi. © 2012 Araújo et al.; licensee BioMed Central Ltd.

Sartori E.R.,Federal University of Sao Carlos | Takeda H.H.,Federal University of Rondonia | Fatibello-Filho O.,Federal University of Sao Carlos
Electroanalysis | Year: 2011

The performance of a glassy carbon electrode modified with functionalized multiwalled carbon nanotubes within a poly(allylamine hydrochloride) film (GCE/PAH/MWCNTs) for the voltammetric determination of sulfite in food samples is described. The anodic peak potential for sulfite oxidation at a GCE/PAH/MWCNTs was 0.41V whereas at GCE/PAH and GCE, the peak potentials were 0.96 and 0.89V, respectively. Using square-wave voltammetric technique, the obtained analytical curve was linear in the sulfite concentration range from 1.1×10 -5 to 3.9×10 -4M, with a detection limit of 4.2μM. The electrode was successfully used to determinate sulfite in vinegar, pickle water, coconut water, and shredded coconut. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Discover hidden collaborations