Navegando por Palavras-chave "Fingerprints"

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    Impressões digitais latentes - a química na revelação e análise dessas importantes ferramentas de identificação
    (Universidade Federal de São Paulo, 2023-10-20) Santos, Beatriz Galdino dos [UNIFESP]; Silva, Alessandra Pereira da [UNIFESP]; http://lattes.cnpq.br/9350330378540095
    Forensic science is an interdisciplinary area that assists in civil and criminal investigation, using scientific methods to solve crimes and its use has become increasingly important. Dactyloscopy, which studies the fingerprint, has been used as an identification tool at crime scenes for many years, as it is an element that individualizes people, because each fingerprint is unique. The application of forensic chemistry to dactyloscopy became a natural path as analytical possibilities and recognition of operating mechanisms advanced. Fingerprints (FP) found at crime scenes can be diverse, such as: visible, latent and cropped. The visible ones just need to be collected, the cropped ones are not always capable of analysis; the latent ones are hidden, requiring the use of revealing agents/developers to identify them. Developers can react with the substance of the FP or adhere to them through intermolecular forces, this depends on the age of the FP, the type of surface and the fingerprint material. This study carried out a bibliographical survey of books and scientific articles related to the revelation of latent fingerprints (LFP), where they were analyzed and categorized, seeking to understand the action mechanisms involved, as well as the comparison between the methods, by surveying the respective advantages and disadvantages and application possibilities. It was identified that on porous surfaces the most common developer is the Reactions with Amino acids, which Indanetrione proved to be more sensitive, and when these surfaces are wet the Physical Developer is the most indicated, despite having good substitutes for it. While on non-porous surfaces the different Powders, Cyanoacrylate Ester Vapor and Small Particle Reagent stand out for their development quality. The trends in this area can be concluded due to the existence of a great diversity of studies already carried out, the abundance of developers and their applications on different surfaces and environmental conditions; in addition to presenting a critical analysis of proven bibliographies.
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    Lipid fingerprinting in women with early-onset preeclampsia: A first look
    (Elsevier B.V., 2012-07-01) De Oliveira, Leandro [UNIFESP]; Camara, Niels Olsen S.; Bonetti, Tatiana [UNIFESP]; Lo Turco, Edson G. [UNIFESP]; Bertolla, Ricardo Pimenta [UNIFESP]; Moron, Antonio F. [UNIFESP]; Sass, Nelson [UNIFESP]; Cotrim Guerreiro Da Silva, Ismael Dale [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP); Hosp Maternidade Vila Nova Cachoeirinha
    Objectives: the aim of this preliminary study was to characterize the plasma lipid profiling of women with preeclampsia.Design and methods: Plasma samples of 8 pregnant women with early-onset preeclampsia and 8 normal pregnant women were evaluated. Lipids were extracted from plasma using the Bligh-Dyer protocol. the extracts were subjected to MALDI-MS. Data matrix was exported for partial least squares discriminant analysis (PLS-DA) and a parameter VIP was employed to reflect the variable importance in the discriminant analysis. the major discriminant variables were selected and underwent to Mann-Whitney U test.Results: A total of 1290 ions were initially identified and twelve m/z signals were highlighted as the most important lipids for the discrimination of patients with preeclampsia. the identification of these differential lipids was carried out through Lipid Database Search.Conclusions: the main classes identified were glycerophosphocholines [GP01], glycerophosphoserines [GP03], glycerophosphoglycerols [GP04], glycosyldiradylglycerols [GL05] and glycerophosphates [GP10]. (C) 2012 the Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.