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Federal University of Roraima

Education
About: Federal University of Roraima is a based out in . It is known for research contribution in the topics: Population & Thermogravimetry. The organization has 981 authors who have published 1218 publications receiving 7849 citations. The organization is also known as: Federal University of Roraima.


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Journal ArticleDOI
TL;DR: In this article, the synthesis and characterization of MoO3 intercalation compounds with pyridazine (pdz), acrylamid (ald) and tris(hydroxymethyl)aminomethane (tham) is reported, taking into account the possible uses of molybdenum trioxide as a molecular sieve towards nitrogen containing compounds.
Abstract: The synthesis and characterization (by CHN elemental analysis, FTIR spectroscopy, XRD diffractometry, thermogravimetry and SEM microscopy) of MoO3 intercalation compounds with pyridazine (pdz), acrylamid (ald) and tris(hydroxymethyl)aminomethane (tham) is reported. Such investigation was performed taking into account the possible uses of molybdenum trioxide as a molecular sieve towards nitrogen containing compounds. It is verified that the affinity of MoO3 towards the investigated species follows the sequence: ald ≅ tham > pdz.

7 citations

19 Jun 2017
TL;DR: In this article, a trabalho avaliar a qualidade do solo (QS), by meio de atributos quimicos e microbiologicos, submetido a diferentes sistemas de uso, sendo: pomar de coqueiros (CO), cultivo de cana-de-acucar (CA), cultivos em consorcio de mandioca, milho e feijao-caupi (MMF), florestamento com sabia (FS),
Abstract: A preocupacao ambiental tem levado a comunidade agricola a buscar manejos que visam a manutencao ou melhoria da qualidade dos solos agricolas. Objetivou-se com este trabalho avaliar a qualidade do solo (QS), por meio de atributos quimicos e microbiologicos, submetido a diferentes sistemas de uso, sendo: pomar de coqueiros (CO), cultivo de cana-de-acucar (CA), cultivo em consorcio de mandioca, milho e feijao-caupi (MMF), florestamento com sabia (FS) e, como referencia, a savana natural (SN). Em cada sistema, foram abertas quatro minitrincheiras e coletadas amostras de solos nas profundidades de 0,0 - 0,05 m, 0,05 – 0,10 m, 0,10 – 0,20 m e 0,20 – 0,40 m. Avaliaram-se nas amostras caracteristicas quimicas e microbiologicas. Observando que as formas de uso do solo proporcionaram melhoria da fertilidade do solo e do teor de MOS, quando comparados com as condicoes naturais de savana, sendo essas alteracoes mais evidentes nas camadas de 0,00 –0,05 e 0,05 – 0,10 m, com destaque para o cultivo em consorcio MMF. Os sistemas de manejos CA e MMF mostraram-se eficientes no aporte de MOS, podendo vir a ser usados como forma de incremento de MO nos solos de savana em Roraima. Os sistemas MMF, CA e FS apresentaram aumento do C-BMS, com maior evidencia nas primeiras camadas (0,0-0,05 e 0,05-0,10 m). As formas de uso do solo proporcionaram, em alguma medida, melhoria da fertilidade do solo e do teor de MOS, quando comparados com as condicoes naturais da savana.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a cartographic study with a qualitative approach was conducted with 70 men in the city of Boa Vista, state of Roraima, Brazil, where participants were encouraged to think about epistemic units, care and body from models that were recorded and their meanings transcribed for content analysis.
Abstract: Objective: to identify men’s knowledge on body care. Method: it is a cartographic study with a qualitative approach. The research was conducted with 70 men in the city of Boa Vista, state of Roraima. The strategy for data production was called the meeting. Participants were encouraged to think about epistemic units, care and body, from models that were recorded and their meanings transcribed for content analysis according to Bardin. Results: 282 units of decoded records such as body hygiene, sexual health and physical exercise were evidenced. In the decoding units, the conscious, functional male body is discussed, which serves for health professionals to think about caring approaches. Final considerations: cartographic forays allowed the male body to be recognized for its functionality, with structured knowledge on care in three dimensions: body hygiene, sexuality and sports practices.

7 citations

Journal ArticleDOI
03 Oct 2017
TL;DR: In this article, the applicability of agricultural hydrogels in Brazilian agriculture has been investigated, and the best methods and quantities to be used were identified and discussed in the literature.
Abstract: The rational use of water is essentual as it is a finite resource. Consequerntly, studies of methids that minimize water use water are essential. As a result, agricultural hydrogels have been extensively tested in as a means of promoting agriculture improvements because of their water- and nutriente-retention characteristics. However, even though hydrogels are used in several sectors of Brazilian agriculture, there are still very few studies on their applications, the best methods and the quantities to be used. Consequently, there is a need for research into the applicability of this technology in Brazil, so that future research needs can be identified and appropriate decisions made at the production level. Therefore, the aim of this study was to collate currently available information on the applicability of agricultural hydrogels in Brazilian agriculture. Over the last decade, forestry is the sector in Brazil that has most studied and used hydrogels, but others such as fruit- and coffeegrowing have also been involved. The method of applying the polymer in granules directly mixed-in with growth substrates is the most used in the production of seedlings. However, use of hydrated gel at planting sites has also been explored. While synthetic hydrogels are most commonly used, those made of natural materials have great potential due to the low preparation costs and their in-soil biodegradability. The quantities of hydrogel used vary according to the target species, application method and objective.

7 citations

Journal ArticleDOI
TL;DR: The population deprived of liberty is a group of highly vulnerable to STI, which can be explained by knowledge deficits on the subject, distorted perceptions and conditions peculiar to imprisonment, which result in risky behavior.
Abstract: OBJECTIVE To evaluate the prevalence of HIV, syphilis and hepatitis B infection among women deprived of liberty in the state of Roraima, Brazil, and its correlation with perceptions, knowledge and behavioral factors. METHOD This is a cross-sectional study, with simple systematic sampling, conducted at the Public Female Prison in Boa Vista, State of Roraima, in 2017. A total of 168 inmates (93.8% of the population) were evaluated by in-person interviews and rapid tests. RESULTS The prevalence of sexually transmitted infections (STI) was 20.2%, being 4.7% HIV, 15.5% syphilis, and 0.0% hepatitis B. Multivariate analysis confirmed as risk factors for acquiring an STI: being over 30 years of age [adjusted odds ratio (OR): 2.57; 95%CI 1.03–6.40); low schooling (adjusted OR: 2.77; 95%CI 1.08–5.05); little knowledge about condom use (adjusted OR: 2.37; 95%CI 1.01–7.31); and believing that there is no risk of contracting syphilis (adjusted OR: 2.36; 95%CI 1.08–6.50). CONCLUSION The population deprived of liberty is a group of highly vulnerable to STI. The high prevalence of these infections can be explained by knowledge deficits on the subject, distorted perceptions and conditions peculiar to imprisonment, which result in risky behavior. We emphasize the need to implement educational programs for preventing, diagnosing and treating STI for this population.

7 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
20222
2021125
2020183
201992
201899