Pedro A. A. de Castro

“Unintended (positive) consequences”: Response-independent reinforcement reduces delay discounting during a test of delay-exposure and maturation effects

Camilo Hurtado‐Parrado, Pedro A. A. de Castro, Julián Cifuentes, Tamera Coulter

Delay Discounting (DD) refers to the tendency for behavioral consequences (rewards or punishers) to be devalued as they occur more remotely in the future. DD has become a fruitful model of impulsive behavior and thus there is growing interest in developing interventions …

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“Unintended (positive) consequences”: Response-independent reinforcement reduces delay discounting during a test of delay-exposure and maturation effects

Camilo Hurtado‐Parrado, Pedro A. A. de Castro, Julián Cifuentes, Tamera Coulter et autres

Delay Discounting (DD) refers to the tendency for behavioral consequences (rewards or punishers) to be devalued as they occur more remotely in the future. DD has become a fruitful model of impulsive behavior and thus there is growing interest in developing interventions …

us, mx (code pays fourni par la source)

FTIR Spectroscopy Analysis of Bound Water in Dried Saliva Samples: Differentiation of Smoking and Non-Smoking Groups and Implications for Oral Cancer Risk

Maria Clara Coelho Ferreira, Vitórya Carvalho Pádua de Magalhães, Thayná Melo de Lima Morais, Felipe da Silva Peralta et autres

Background: According to the WHO, oral cancer is the thirteenth most common cancer worldwide, with tobacco use being one of the primary causes of oral cancer. This study aimed to characterize and differentiate the saliva and bound water using FTIR spectroscopy in …

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Bimolecular Profile of Tobacco Users by Infrared Spectroscopy and Machine Learning Approaches

Marcelo Saito Nogueira, Natalia Caroline Queiroz Costa, Kusai Baroudi, Maria Clara de Moura Santos Coelho Ferreira et autres

Objectives: Our study validates the preliminary steps needed to introduce FT-IR spectroscopy as a point-of-care diagnostic tool, particularly for patients at high risk for cancer. Materials and methods: FT-IR spectroscopy was used to determine molecular changes and classify saliva samples of control, …

OPTICAL BIOPSY AND ARTIFICIAL INTELLIGENCE AS A DIAGNOSTIC TOOL OF SMOKERS: A PILOT STUDY

Maria Clara de Moura Santos Coelho Ferreira, Pedro A. A. de Castro, Felipe da Silva Peralta, Dárcio Kitakawa et autres

Chemometrics of biological tissues using infrared spectroscopy

Pedro A. A. de Castro

Aos meus irmãos e cunhadas por todo o companheirismo e amizade.Sei que posso sempre contar com vocês.Ao Instituto de Pesquisas Energéticas e Nucleares(IPEN) e ao Centro de Lasers e Aplicações (CLA) por possibilitar infraestrutura nesses anos de aprendizado.Ao acolhedor grupo de Biofotônica.

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Biochemical characterization of saliva of smoking and non-smoking patients by using Fourier-transform infrared spectroscopy

Maria Clara de Moura Santos Coelho Ferreira, Leonardo Barbosa Leal, Marcelo Saito Nogueira, Pedro A. A. de Castro et autres

Early-stage cancer detection is challenging due to the lack of associated oral-tissue clinical features and absence of changes on conventional cellular-imaging, serological and histopathological exams. By using a molecular-sensitive optical technique such as Fourier-transform infrared (FT-IR) spectroscopy, disease-specific biochemical changes can be …

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Assessment of bone dose response using ATR-FTIR spectroscopy: A potential method for biodosimetry

Pedro A. A. de Castro, Derly Augusto Dias, Matheus del‐Valle, Marcelo Noronha Veloso et autres

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Bone as a biomarker for detecting low dose of ionizing radiation: a pilot study

Pedro A. A. de Castro, Derly Augusto Dias, Marcelo Noronha Veloso, Denise Maria Zezéll

FTIR spectroscopy was able to discriminate bone samples receiving low-dose ionizing radiation doses (0.002 kGy, 0.004 kGy, 0.007 kGy), offering valuable insights in view of the understanding of radiation dose response in biological systems.

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Assessment of bound water of saliva samples by using FT-IR spectroscopy

Maria Clara Coelho Ferreira, Gabriela Reganin Monteiro, Felipe da Silva Peralta, Pedro A. A. de Castro et autres

The objective of the present work is to show the relationship of the high-wavenumber spectral region concern OH vibrations, which show in a way how bound water can be altered in different sample groups.

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The impact of scan number and its preprocessing in micro-FTIR imaging when applying machine learning for breast cancer subtypes classification

Matheus del‐Valle, Moisés Oliveira dos Santos, Sofia Nascimento dos Santos, Pedro A. A. de Castro et autres

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Assessment of the preventive effects of Nd:YAG laser associated with fluoride on enamel caries using optical coherence tomography and FTIR spectroscopy

Márcia Cristina Dias de Moraes, Pedro A. A. de Castro, Daísa L. Pereira, Patrícia Aparecida Ana et autres

OBJECTIVE: This in vitro study characterized and monitored, by Optical Coherence Tomography (OCT) and Fourier Transformed Infrared Spectroscopy (FTIR), the effects of the association of acidulated phosphate fluoride gel (APF-gel) and Nd:YAG (neodymiun:yttrium-aluminum-garnet) laser, as sequencial treatments, in the prevention of incipient …

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