228 research outputs found
Analysis of CO 2 emissions and techno-economic feasibility of an electric commercial vehicle
In order to attain emissions reduction targets to improve air quality and reduce global warming, electric vehicles (EVs) arise as alternatives to conventional vehicles fueled by fossil fuels. In this context, this work presents a comparative study between an EV and its conventional version, a medium-duty, diesel engine powered vehicle, from road tests following a standard cycle in urban driving conditions. The performance parameters evaluated are EV electric energy consumption and carbon dioxide (CO2) emissions from electricity generation and, for the conventional vehicle, exhaust CO2 emissions and energy consumption calculated from fuel consumption and heating value. Five scenarios were built to conduct an economic viability study in terms of payback and net present value (NPV). Considering the conditions applied, the results from the environmental analysis showed that CO2 emissions from the EV was 4.6 times lower in comparison with the diesel vehicle. On the other hand, the economic analysis revealed that the viability of the EV is compromised, mainly due to the imported parts with unfavorably high exchange rates. In the best scenario and not considering revenue from commercial application, the calculated payback period of the EV is 13 years of operation
Simulation of the impacts on carbon dioxide emissions from replacement of a conventional Brazilian taxi fleet by electric vehicles
This work evaluates the effects of the replacement of engine-powered vehicles by electric vehicles on
carbon dioxide (CO2) emissions and energy consumption. A case study of a taxi fleet replacement was conducted with the aid of the AVL Cruise software. The simulation was performed under different scenarios of total or partial fleet replacement along a period of 15 years. The scenarios were designed considering favorable and unfavorable conditions for electricity production from a clean source, thus influencing the CO2 emission factor adopted. The simulations showed that the electric energy consumption by the electric vehicles is about four times lower than fuel energy consumption by the conventional
vehicles undergoing a standard test schedule. At the end of the period considered the electric vehicles will produce lower CO2 emissions than the conventional vehicle fleet by a factor of 10, even considering the most unfavorable scenario of electric power generation. An economic analysis shows that the present value of electric vehicles over the years is lower than that of conventional vehicles,
except for the first year after vehicle acquisition
Potencialidades y limitaciones del desempeño de las enfermeras en el Centro Parto Normal
Objective: To know the potentialities and limitations of the nurse’s performance in the Center for Normal Birth (CPN). Method:
Qualitative approach, exploratory-descriptive type, carried out in 2018, with six nurses working in public intra-hospital CPN in the
metropolitan region of Fortaleza, Ceará, Brazil. The collection of information occurred through individual interview, with analysis
from the assumptions of the sociology of professions, focusing on the themes: knowledge and autonomy; credentialism; division
of labor; labor market and value chart. Result: The nurse’s performance in the Center for Normal Birth (CPN)enhances good
practices for childbirth and birth, as well as increases the importance and visibility of this professional in maternal and child
care. Clinical care and management emerge as the focus of the nurse’s action in the CPN. However, even with the induction of
the State to this action, there is still the need for recognition of the competencies and autonomy of the nurse in obstetric care by
other professionals. Conclusion and implications for practice: There are challenges that need to be overcome such as the
expansion of autonomy and respect for the accreditation of the nurse to work in the CPN and the harmonization between the
management of the work process and management of clinical care by this professional.Objetivo: Conhecer as potencialidades e limitações da atuação do enfermeiro no Centro de Parto Normal (CPN). Método:
abordagem qualitativa, do tipo exploratório e descritivo, realizado em 2018, com seis enfermeiras atuantes em CPN intrahospitalar
público na região metropolitana de Fortaleza, Ceará, Brasil. A coleta das informações ocorreu por meio de entrevista
individual, com análise a partir dos pressupostos da sociologia das profissões, com foco nos temas: conhecimento e autonomia;
credencialismo; divisão do trabalho; mercado de trabalho e quadro de valores. Resultado: A atuação do enfermeiro no CPN
potencializa as boas práticas para o parto e nascimento, bem como amplia a importância e visibilidade deste profissional no
cuidado materno-infantil. O cuidado clínico e a gestão emergem como foco da ação do enfermeiro no CPN. No entanto, mesmo
com a indução do Estado para essa atuação, ainda há a necessidade de reconhecimento das competências e autonomia do
enfermeiro no cuidado obstétrico por outros profissionais. Conclusão e implicações para a prática: Há desafios que precisam
ser superados como a ampliação da autonomia e do respeito ao credenciamento do enfermeiro para atuação no CPN e a
harmonização entre a gestão do processo de trabalho e gestão do cuidado clínico por este profissional.Objetivo: Conocer las potencialidades y limitaciones del desempeño de la enfermera en el Centro de Parto Normal (CPN).
Método: Enfoque cualitativo, del tipo exploratorio-descriptivo, realizado en 2018, con seis enfermeras que trabajan en el CPN
intrahospitalario público en la región metropolitana de Fortaleza, Ceará, Brasil. La recopilación de información se realizó mediante
una entrevista individual, con análisis basado en los supuestos de la sociología de las profesiones, centrándose en los temas:
conocimiento y autonomía; credencialismo; división del trabajo; mercado de trabajo y tabla de valores. Resultado: El desempeño
de la enfermera en la CPN mejora las buenas prácticas para el parto y el nacimiento, así como aumenta la importancia y la
visibilidad de este profesional en el cuidado de la madre y el niño. El cuidado clínico y la gestión surgen como el foco de la
acción de la enfermera en la CPN. Sin embargo, incluso con la inducción del Estado a esta acción, sigue siendo necesario que
otros profesionales reconozcan las aptitudes y la autonomía de la enfermera en la atención obstétrica por otros profesionales.
Conclusión e implicaciones para la práctica: Hay desafíos que deben superarse, como el aumento de la autonomía y el
respeto de la acreditación de las enfermeras para trabajar en la CPN y la armonización de la gestión del proceso de trabajo y
la gestión de la atención clínica por parte de este profesional.info:eu-repo/semantics/publishedVersio
Production and characterization of protease from Penicillium aurantiogriseum URM 4622
Proteases with new properties are required due to their increasing industrial importance. In this work, the
optimal fermentation conditions for the production of a protease from Penicillium aurantiogriseum dierchx
(URM-4622) are presented together with partial characterization of the protease catalytic properties.
The batch fermentation conditions that allow for the highest specific proteolytic activity are 26 ºC, pH 7.0,
and 25 % saturation dissolved O2 concentration. The obtained protease is stable over a wide range of pH
(5.8 to 9.5) and temperature (25 to 40 ºC) values. In the presence of Zn2+ a 26 % reduction in the enzyme
proteolytic activity occurs and, in contrast, Mn2+ enhances its activity by 28.9 %. 96.2 % and 70.8 % of
the protease activity are maintained after 90 min incubation in 5 and 10 % (v/v) H2O2 aqueous solutions,
respectively. PMSF inhibition reveals that this enzyme is a serine protease. Protease is able to hydrolyze
different proteins
MELKERSSON-ROSENTHAL SYNDROME
A síndrome de Melkersson-Rosenthal é composta pela tríade: língua plicata, paralisia facial intermitente e edema orofacial. O achado dominante e mais precoce é o edema orofacial. Desta forma, o dermatologista é frequentemente o primeiro profissional a ter contato com o paciente. A condição tem sido pouco descrita em revistas dermatológicas. Apresentamos um caso clássico da tríade completa.The Melkersson-Rosenthal Syndrome is composed of the Triad: linqua plicata, intermittent facial palsy and orofacial swelling. Usually, the dominant and earliest finding of the syndrome is the orofacial swelling. Therefore, it’s frequently the dermatologist the first professional to have contact with the patient. Yet, the condition has been few times described in dermatological literature. We present a classical case of the complete triad
BALANÇO DA PRODUÇÃO DO CONHECIMENTO SOBRE CORPO E CULTURA: o Centro-Oeste em questão
Resumo: Trata-se de pesquisa com o objetivo apresentar balanço da produção do conhecimento sobre “corpo e cultura” na região Centro-Oeste do Brasil. Realizou-se pesquisa documental tendo por fonte dois veículos de comunicação científica: i) os anais do Congresso Brasileiro de Ciências do Esporte (CONBRACE), especificamente a produção do GTTCC, nos anos 2005, 2007, 2009, 2011 e 2013; ii) as Revistas Brasileiras de Ciências do Esporte (RBCE), no período de 10 anos de publicação (2003 a 2012). O tratamento dos dados se deu numa perspectiva quali-quantitativa, com interesse descritivo e exploratório. Os dados confirmam outras pesquisas sobre a regionalização da produção do conhecimento no campo da Educação Física no Brasil. Destaca-se: i) a quase inexistente vinculação dos trabalhos a grupos de pesquisa, embora a titularidade da maioria dos autores seja de mestres e doutores; ii) a maioria são do sexo feminino; iii) a instituição de mais destaque é a UFG; iv) apenas três trabalhos foram financiados; v) o tema predominante é “corpo, educação, sociedade e cultura”, e v) a maioria dos trabalhos foram classificados na concepção de “corpo com o mundo/natureza”. Palavras-chave: Corpo, Produção de Conhecimento, Região Centro-Oeste, Educação Física Abstract: This paper aims to present the balance of the knowledge production about “body and culture” in the Brazil Central West Zone. It was realized a documental researchby having two vehicles source scientific communication: i) the proceedings of Brazilian Congresso f Sport Science (CONBRACE), specifically the production of GTTCC, in the years 2005, 2007, 2009, 2011, 2013; ii) The Brazilian Journal of Sport Sciences (RBCE), in the publication of 10 years (2003 a 2012).The data analyzes was done in a qu quali-quantitative perspective, with descriptive and exploratory interest. Data confirm another researches about the knowledge production Regionalization in the Physical Education field inBrazil. It stands out: i) the almost inexistence relationship of works with research groups, although the majority authors titling are made of masters and doctors; ii) the predominance off emale sex; iii) the spotlight institution is the UFG; iv) only three works were funded; v) the predominant subject is “body, education, society and culture”, and v) the most of works was classified into the “body with world/nature” conception. Keywords: body, knowledge production, Central West Zone, Physical Education
Isolation and functional characterization of proinflammatory acidic phospholipase A2 from Bothrops leucurus snake venom
AbstractIn the present study, an acidic PLA2, designated Bl-PLA2, was isolated from Bothrops leucurus snake venom through two chromatographic steps: ion-exchange on CM-Sepharose and hydrophobic chromatography on Phenyl-Sepharose. Bl-PLA2 was homogeneous on SDS-PAGE and when submitted to 2D electrophoresis the molecular mass was 15,000Da and pI was 5.4. Its N-terminal sequence revealed a high homology with other Asp49 acidic PLA2s from snake venoms. Its specific activity was 159.9U/mg and the indirect hemolytic activity was also higher than that of the crude venom. Bl-PLA2 induced low myotoxic and edema activities as compared to those of the crude venom. Moreover, the enzyme was able to induce increments in IL-12p40, TNF-α, IL-1β and IL-6 levels and no variation of IL-8 and IL-10 in human PBMC stimulated in vitro, suggesting that Bl-PLA2 induces proinflammatory cytokine production by human mononuclear cells. Bothrops leucurus venom is still not extensively explored and knowledge of its components will contribute for a better understanding of its action mechanism
Eleições presidenciais em Cabo Verde
Polis. - ISSN 0872-8208. - S. 2, n. 4 (Julho-Dezembro 2021). - p. 231-234.A democracia cabo-verdiana é, tradicionalmente, considerada como um caso de sucesso no continente africano. A obtenção da independência por uma via pacífica, ao contrário de Angola, Guiné-Bissau e Moçambique, levou a que Cabo Verde se destacasse enquanto um estado insular, com uma fraca divisão étnica, religiosa e linguística, e sem uma herança de conflito armado no seu território. Comparativamente a outras ex-colónias portuguesas, a transição para a democracia foi menos complexa e pacífica. As primeiras eleições da África lusófona em que ocorreu a participação de mais do que um partido político foram as eleições legislativas de Cabo Verde, realizadas em 1991, onde venceu o partido da oposição Movimento para a Democracia (MpD). Desde essa altura, as eleições têm levado à sistematização de um regime bipartidário alicerçado nas duas maiores forças políticas – PAICV e MpD, alternando no poder de forma pacífica durante os últimos anos. Segundo Sanches, as diferenças entre estes partidos e os seus eleitores são muito ténues, embora o PAICV seja membro da Internacional Socialista e tenha uma maior pendência para a esquerda, e o MpD seja membro da Internacional Democrata Centrista com um maior pendor de direita
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