scispace - formally typeset
Search or ask a question
Institution

Universidade Positivo

EducationCuritiba, Brazil
About: Universidade Positivo is a education organization based out in Curitiba, Brazil. It is known for research contribution in the topics: Population & Biodiversity. The organization has 1290 authors who have published 1237 publications receiving 9335 citations. The organization is also known as: Positive University.


Papers
More filters
Journal ArticleDOI
TL;DR: The aim of this study was to isolate, identify and characterize bacteria capable of degrading petroleum from the rhizosphere of Panicum aquaticum Poir.
Abstract: Petroleum is an important energy source. Due to its intensive exploration, accidents resulting in oil spills on soil are frequent, which creates consequences to ecosystems and human health. Rhizodegradation is an efficient technique that promotes the decontamination of polluted environments through the selection and use of rhizosphere microorganisms from phytoremediation plants. The aim of this study was to isolate, identify and characterize bacteria capable of degrading petroleum from the rhizosphere of Panicum aquaticum Poir., a plant that grows in petroleum contaminated soils. Three bacteria were isolated and characterized at the morphological (Gram staining), molecular (16S rRNA gene sequence analysis) and biochemical level. These bacteria were identified as new strains of Bacillus thurigiensis, Bacillus pumilus and Rhodococcus hoagii, which have been reported as potential bioremediators in the literature. All three bacteria were able to use petroleum hydrocarbons as the sole carbon source during in vitro degradation assays. Gas chromatography analysis of these assays indicated reductions of petroleum hydrocarbons between 23% and 96% within 48 h. Among the isolated bacteria, Rhodococcus hoagii presented the highest efficiency of petroleum consumption, reaching 87% of degradation after only 24 h of cultivation, which corresponds to a higher and faster degradation than previously reported, confirming the potential use of Rhodococcus hoagii for petroleum biodegradation.

41 citations

Journal ArticleDOI
04 Mar 2010-Zootaxa
TL;DR: The current total number of species found in Brazil is 270, distributed in 19 families and 92 genera, an increase of 71 species and 12 genera in the last 6 years as discussed by the authors.
Abstract: The current total number of species found in Brazil is 270, distributed in 19 families and 92 genera, an increase of 71 species and 12 genera in the last 6 years. The greatest known diversity is found in Rio de Janeiro (132 species), Amazonas (56), Espirito Santo (30) and Sao Paulo (28), while there are no record to seven Brazilian states (Acre, Alagoas, Distrito Federal, Goias, Rio Grande do Norte, Roraima and Tocantins). Distribution of the records clearly defines the areas that urge investments in scientific research and taxonomic survey and reflects the concentration of information in those centers that host the few specialists in Collembola, currently working in Brazil.

41 citations

Journal ArticleDOI
TL;DR: In this article, the authors used principal component analysis (PCA) and canonical discriminant analysis (CDA) to evaluate the soil fauna, its relation to other explanatory environmental variables and select edaphic indicators that more contribute to separate the land use systems (LUS).
Abstract: The present study aims to generate knowledge about the soil fauna, its relation to other explanatory environmental variables, and, besides it, to select edaphic indicators that more contribute to separate the land use systems (LUS). Five different LUS were chosen: conventional tillage with crop rotation (CTCR); no-tillage with crop rotation (NTCR); conventional tillage with crop succession (CTCS); no-tillage with crop succession (NTCS) and minimum tillage with crop succession (MTCS). The samples were made in the counties Chapeco, Xanxere and Ouro Verde located in the state of Santa Catarina, Brazil, and were considered the true replicates of the LUS. In each site, nine points were sampled in a sampling grid of 3 x 3. At the same points, soil was sampled for the physical, chemical and biological attributes (environmental variables). Pitfall traps were used to evaluate the soil fauna. Data were analyzed using principal component analysis (PCA) and canonical discriminant analysis (CDA). The soil fauna presented potential to be used as indictors of soil quality, since some groups proved to be sensible to changes of the environmental variables and to soil management and tillage. The soil management using crop rotation (NTCR and CTCR) presented higher diversity, compared to the systems using crop succession (NTCS, MTCS and NTCS), evidencing the importance of the soil tillage, independent of the season (summer or winter). The variable that better contributed to explain these changes were the chemical variables (potassium, pH, calcium, organic matter, available phosphorus, potential acidity), and biological variables (Shannon diversity index, Collembola, Pielou equitability index and microbial biomass carbon), respectively.

41 citations

Journal ArticleDOI
TL;DR: The results found match studies from other universities and also showed a high number of drug users, especially for alcohol, which points out the importance of having proper education in preventing drug addiction.
Abstract: O uso de drogas entre estudantes universitarios esta cada dia mais difundido. Os indices de uso de alcool e drogas ilicitas podem ser maiores na populacao universitaria do que na populacao em geral. OBJETIVO: Este trabalho procurou detectar quais sao as drogas de abuso usadas pelos estudantes de medicina de universidade privada de Curitiba para posterior implementacao de programa de prevencao secundaria nesta populacao. METODOS: Durante 106 dias, em 2006, foi aplicada adaptacao virtual do questionario Alcohol, Smoking and Substance Involvement Screening Test (ASSIST) aos 209 estudantes de medicina participantes do presente trabalho. RESULTADOS: Oitenta e oito (42%) estudantes participaram. A maioria era solteira (88%) e tinham entre 17 e 25 anos (85%). Setenta e oito por cento usou alcool pelo menos uma vez na vida. O uso na vida de tabaco foi de 39%; cannabis sativa 26%, inalantes 22% e estimulantes 11%. DISCUSSAO: Os resultados encontrados sao semelhantes aos de outras pesquisas em universidades e mostram alto numero de usuarios de drogas, especialmente o alcool. Essa e uma situacao preocupante e aponta a importância da instituicao educacional na prevencao da dependencia quimica. CONCLUSAO: O ambiente universitario influencia o uso de drogas e novas estrategias de prevencao sao necessarias.

41 citations

Journal ArticleDOI
TL;DR: Hospital hyperglycemia was correlated with, among other parameters, morbidity/mortality, length of hospitalization and number of re-hospitalizations, and there was a wide variation in glucose target medical prescriptions.
Abstract: Background Hyperglycemia in hospitalized patients is known to be related to a higher incidence of clinical and surgical complications and poorer outcomes. Adequate glycemic control and earlier diagnosis of type 2 diabetes during hospitalization are cost-effective measures.

40 citations


Network Information
Related Institutions (5)
Federal University of Paraná
46.6K papers, 546.5K citations

87% related

Sao Paulo State University
100.4K papers, 1.3M citations

86% related

University of São Paulo
272.3K papers, 5.1M citations

86% related

Universidade Federal do Rio Grande do Sul
89.4K papers, 1.4M citations

86% related

Universidade Federal de Minas Gerais
75.6K papers, 1.2M citations

85% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
202216
2021106
2020118
2019108
2018142