1,720,956 research outputs found
Identificação de cocaína e seus adulterantes em impressões digitais latentes reveladas com tiocarbamoil pirazol utilizando molde de silicone
No full textThis study comprises the application of a silicone mold simulating the papillary lines present in the distal phalanx connected to an experimental protocol for developing fingerprints with residues of cocaine and some of its adulterants. Substances excreted by human skin such as squalene and in particular palmitoleic, myristic, lauric, octadecanoic and decanoic fatty acids were simulated using synthetic esters that were later made available for application to the mold. Four samples containing one of them residues of cocaine, another of lidocaine, a third of caffeine and a fourth sample containing a mixture of residues of caffeine, lidoaine and benzocaine were added onto glass surfaces. Subsequently, the silicone mold moistened by a mixture of squalene and fatty acids was pressed onto the surfaces and simulated fingerprints were developed with thiocarbamoyl pyrazole developer. After development, the material was traced and extracted by washing with methanol for analysis by Gas Chromatography coupled with Mass Spectrometry (CG/MS) allowing the identification of cocaine, lidocaine and caffeine residues present in latent papillary prints. Still, the material resulting from the glass surface with residue from the mixture of caffeine, lidocaine and benzocaine was subjected to analysis by Liquid Chromatography coupled with Mass Spectroscopy (LC/MS/MS) where the presence of adulterants, of the substances used to simulate, was identified. the material excreted from the distal phalanx (scalene and fatty acid esters) and also from the developer powder.Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul - FAPERGSCoordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESEste estudo compreende a aplicação de um molde de silicone simulando as linhas papilares presentes na falange distal conectado à um protocolo experimental para revelação de impressões digitais com resíduos de cocaína e alguns de seus adulterantes. As substâncias excretadas pela pele humana como o esqualeno e em especial os ácidos graxos palmitolêico, mirístico, láurico, octadecanóico e decanóico foram simulados através de ésteres sintéticos que posteriormente foram disponibilizados para aplicação ao molde. Quatro amostras contendo uma delas resíduos de cocaína, outra de lidocaína, uma terceira de cafeína e uma quarta amostra contendo uma mistura de resíduos de cafeína, lidoaína e benzocaína foram adicionados sobre superfícies de vidro. Posteriormente o molde de silicone umedecido pela mistura de esqualeno e os ésteres dos ácidos graxos foi pressionado sobre as superfícies de vidro sendo efetuada a revelação de impressões digitais com o revelador tiocarbamoil pirazol. Após a revelação o material foi decalcado sendo extraído através de lavagem com metanol para análise por Cromatografia Gasosa acoplada a Espectrometria de Massas (CG/MS) permitindo a identificação dos resíduos de cocaína, lidocaína e cafeína presentes nas impressões papilares latentes. Ainda o material resultante da superfície de vidro com resíduo da mistura de cafeína, lidocaína e benzocaína foi submetido a análise por Cromatografia Líquida acoplada a Espectroscopia de Massas (LC/MS/MS) onde foi identificada a presença dos adulterantes, das substâncias utilizadas para simular o material excretado pela falange distal (escaleno e ésteres dos ácidos graxos) e também do pó revelador
Identificação de cocaína e seus adulterantes em impressões digitais latentes reveladas com tiocarbamoil pirazol utilizando molde de silicone
Get PDFThis study comprises the application of a silicone mold simulating the papillary lines present in the distal phalanx connected to an experimental protocol for developing fingerprints with residues of cocaine and some of its adulterants. Substances excreted by human skin such as squalene and in particular palmitoleic, myristic, lauric, octadecanoic and decanoic fatty acids were simulated using synthetic esters that were later made available for application to the mold. Four samples containing one of them residues of cocaine, another of lidocaine, a third of caffeine and a fourth sample containing a mixture of residues of caffeine, lidoaine and benzocaine were added onto glass surfaces. Subsequently, the silicone mold moistened by a mixture of squalene and fatty acids was pressed onto the surfaces and simulated fingerprints were developed with thiocarbamoyl pyrazole developer. After development, the material was traced and extracted by washing with methanol for analysis by Gas Chromatography coupled with Mass Spectrometry (CG/MS) allowing the identification of cocaine, lidocaine and caffeine residues present in latent papillary prints. Still, the material resulting from the glass surface with residue from the mixture of caffeine, lidocaine and benzocaine was subjected to analysis by Liquid Chromatography coupled with Mass Spectroscopy (LC/MS/MS) where the presence of adulterants, of the substances used to simulate, was identified. the material excreted from the distal phalanx (scalene and fatty acid esters) and also from the developer powder.Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul - FAPERGSCoordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESEste estudo compreende a aplicação de um molde de silicone simulando as linhas papilares presentes na falange distal conectado à um protocolo experimental para revelação de impressões digitais com resíduos de cocaína e alguns de seus adulterantes. As substâncias excretadas pela pele humana como o esqualeno e em especial os ácidos graxos palmitolêico, mirístico, láurico, octadecanóico e decanóico foram simulados através de ésteres sintéticos que posteriormente foram disponibilizados para aplicação ao molde. Quatro amostras contendo uma delas resíduos de cocaína, outra de lidocaína, uma terceira de cafeína e uma quarta amostra contendo uma mistura de resíduos de cafeína, lidoaína e benzocaína foram adicionados sobre superfícies de vidro. Posteriormente o molde de silicone umedecido pela mistura de esqualeno e os ésteres dos ácidos graxos foi pressionado sobre as superfícies de vidro sendo efetuada a revelação de impressões digitais com o revelador tiocarbamoil pirazol. Após a revelação o material foi decalcado sendo extraído através de lavagem com metanol para análise por Cromatografia Gasosa acoplada a Espectrometria de Massas (CG/MS) permitindo a identificação dos resíduos de cocaína, lidocaína e cafeína presentes nas impressões papilares latentes. Ainda o material resultante da superfície de vidro com resíduo da mistura de cafeína, lidocaína e benzocaína foi submetido a análise por Cromatografia Líquida acoplada a Espectroscopia de Massas (LC/MS/MS) onde foi identificada a presença dos adulterantes, das substâncias utilizadas para simular o material excretado pela falange distal (escaleno e ésteres dos ácidos graxos) e também do pó revelador
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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