186,751 research outputs found
Determinación de sebo bovino en mantequilla utilizando un método integral
No full textThe detection of animal fats such as tallow in butter using standard criteria is more difficult than vegetable fats. In order to perform a complete assessment, several methods are likely to be used together. In the experimental design of this research, compositional characteristics such as fatty acids, sterols and triacylglycerols, along with the conventional physicochemical characteristics of butter mixed with different percentages of tallow (0–15% w/w) were evaluated. An increase of less than 5% (w/w) in bovine tallow content in butter physicochemical tests, sterols and fatty acids could not indicate the adulteration level but the ratio of C6+8+10+12/C18 fatty acids, C52/C50، C52/C48, C52/C46 triacylglycerols, S1, S3, S5-value equation and C52 triacylglycerols could show this adulteration level in butter. Also, the successive use of fatty acids and triacylglycerols resulted in the capability to determine adulteration in butter including bovine tallow above 1% (w/w).La detección de grasas animales, como el sebo en mantequilla, utilizando criterios estándares es más difícil que las grasas vegetales y esto probablemente se puede evaluar mediante la recopilación de métodos de evaluación y mediante un enfoque completo. En el diseño experimental de esta investigación, se evaluaron las características composicionales como los ácidos grasos, esteroles y triacilgliceroles junto con los índices fisicoquímicos convencionales, en mantequilla mezclada con un porcentaje diferente de sebo (0–15% p/p). Mediante un aumento de menos del 5% (p/p) de contenido de sebo bovino en mantequilla, las pruebas fisicoquímicas, los esteroles y los ácidos grasos no pudieron indicar el nivel de adulteración, pero sí lo hizo la relación de ácidos grasos C6+8+10+12/C18, la relación de triacilgliceroles C52C50; C52/C48; C52/C46; los valores de S1, S3, S5 en la ecuación y los triacilgliceroles C52. Además, el uso sucesivo de ácidos grasos y triacilgliceroles dio como resultado la capacidad de determinar la adulteración en la mantequilla, incluido el sebo bovino por encima del 1% (p/p)
Maupassant contista traduzido em analogias brasileiras: paratextos
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Estudos da Tradução, Florianópolis, 2014O presente trabalho tem como objetivo principal analisar os elementos paratextuais presentes em doze antologias, dos séculos XX e XXI, traduzidas no Brasil, de Guy de Maupassant, autor francês do século XIX, pretendendo revelar como o autor e sua obra são apresentados ao leitor brasileiro, através dos paratextos. Foram analisadas somente as antologias traduzidas com contos do autor francês, não considerando as publicações mistas. O principal referencial teórico abordado foi fundamentado nas reflexões de Gérard Genette (2009) e Marie-Hèléne C. Torres (2011).Abstract: The main objective of this work is to examine the paratextual elements in twelve anthologies of the French author Guy de Maupassant's short stories, translated and published in the 20th and 21st centuries in Brazil, in order to disclose how the writer and his oeuvre are presented to the Brazilian reader, through the use of paratexts. I analysed only the translated anthologies with short stories from the author himself; anthologies that had other authors as well were not considered. The main theoretical framework was based on the reflections of Gérard Genette (2009) and Marie-Hèléne C. Torres (2011)
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Review of Jeff Sebo: Saving Animals, Saving Ourselves: Why Animal Matter for Pandemics, Climate Change, and Other Catastrophes
No full textReview of Saving Animals, Saving Ourselves: Why Animal Matter for Pandemics, Climate Change, and Other Catastrophes (Oxford University Press, 2022), by Jeff Sebo</p
Serrated flow in AZ91 magnesium alloy in tension and compression
No full textAZ91 magnesium alloy exhibits jerky flow when deformed a short time after solution heat treatment and quenching. The occurrence of stress drops and discontinuous plastic deformation has been observed at temperatures in the vicinity of ambient temperature in tension as well as compression. The alloy exhibits some degree of negative strain rate sensitivity. Acoustic emission accompanies the stress drops. It is concluded that successive deformation bands propagate along the gauge length as soon as the material develops gross plastic deformation, regardless of the applied strain rate. The results are discussed in terms of current theories for the Portevin-LeChatelier effect
Review of Jeff Sebo: Saving Animals, Saving Ourselves: Why Animal Matter for Pandemics, Climate Change, and Other Catastrophes
No full textReview of Saving Animals, Saving Ourselves: Why Animal Matter for Pandemics, Climate Change, and Other Catastrophes (Oxford University Press, 2022), by Jeff Sebo</p
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Produção de biodiesel a partir de gordura abdominal de frangos
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Química, Florianópolis, 2012.Nos últimos anos tem-se discutido fontes de matrizes energéticas em substituição às de origem fóssil, aliado à preocupação com as questões socioambientais, principalmente no que se refere ao aquecimento global, com a degradação da qualidade do ar que respiramos e o comprometimento da saúde da população. Neste sentido, os rejeitos de gordura animal, gerados pelas agroindústrias, surgem como uma alternativa para a produção de biodiesel. Apesar de ser uma matéria-prima em abundância, principalmente na região sul do Brasil, a sua utilização ainda não esta difundida, pois depende de mais estudos para obtenção de melhores resultados de rendimento e qualidade do biodiesel e também da viabilidade econômica da produção em escala industrial feita pelo próprio frigorífico. Este trabalho apresenta uma otimização do processo de produção do biodiesel etílico com catálise básica a partir de gordura abdominal de frangos, onde os dados foram tratados através do software DCCR do Statistica®. Foram avaliadas três variáveis (razão gordura:etanol, concentração de catalisador NaOH e temperatura) e o rendimento das reações foi estimado pela concentração em éster de gordura de frangos. Obteve-se uma conversão em éster de 98,2%, quando utilizado as seguintes condições: razão gordura:etanol de 1:6, concentração de catalisador NaOH de 1,75%, e temperatura de 50 ºC. O biodiesel obtido nestas condições está de acordo com as normas da Resolução ANP 07/2008, quanto às características avaliadas neste trabalho que foram densidade, viscosidade e ponto de entupimento de filtro a frio.Abstract : In recent years it has been discussed of energy matrices in substitution the fossil fuels, coupled with this comes the concern about environmental issues, particularly with regard to global warming, the degradation of the quality of air breathed and the commitment the general health of the human population. From these concerns, the waste generated from animal fat by agribusinesses emerges as an alternative for the production of biodiesel. Despite being a raw material in abundance, especially in southern Brazil, its use is not yet widespread, as the science currently requires further studies to obtain better yield, improved biodiesel quality, and also a better understanding of the economic viability of production on an industrial scale by agribusiness. This work presents an optimization of the production process of ethanol and biodiesel via base catalysis of abdominal fat of chickens, using DCCR Statistica® software. Three variables were evaluated (ratio fat:ethanol, NaOH catalyst concentration and a temperature) as a function of conversion into ester chicken fat. What was obtained was a conversion 98.2% when used with the following conditions: ratio fat: ethanol 1:6, NaOH catalyst concentration of 1.75% and a temperature of 50 ° C. The biodiesel obtained under these conditions is consistent with the standards of ANP Resolution 07/2008, concerning the characteristics that were evaluated in this study density, viscosity and filter plugging cold point
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