Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Sthanley R. De Lima"'
Autor:
Sthanley R. De Lima, Larissa R. Lourenço, Marina Thomaz, Djalmir N. Messias, Acácio A. Andrade, Viviane Pilla
Publikováno v:
Photochem, Vol 3, Iss 1, Pp 1-14 (2023)
In this work, we monitored the fluorescence quantum efficiency (η) and the fluorescence lifetime (τ) of natural dye extracts from the leaves of Tradescantia pallida purpurea. The natural dye was extracted from leaves in aqueous solutions as a funct
Externí odkaz:
https://doaj.org/article/8588d38594b74a608046dde805abd464
Autor:
Tácio T.S. Santos, Larissa R. Lourenço, Sthanley R. de Lima, Luiz R. Goulart, Djalmir N. Messias, Acácio A. Andrade, Viviane Pilla
Publikováno v:
Journal of Photochemistry and Photobiology, Vol 8, Iss , Pp 100080- (2021)
This work reports the thermo-optical and photophysical properties of annatto extracted from the seeds of the tropical shrub Bixa Orellana L. Aqueous natural dyes were extracted using different amounts of NH4OH solution (4 M) and separated into two gr
Externí odkaz:
https://doaj.org/article/67092a10f51f4976839c26622956cf0f
Autor:
Larissa R. Lourenço, Sthanley R. de Lima, Tácio T. S. Santos, Djalmir N. Messias, Acácio A. Andrade, Viviane Pilla
Publikováno v:
Latin America Optics and Photonics (LAOP) Conference 2022.
The natural dyes were extracted at different potential hydrogen (pH) values. The spectroscopy and fluorescence quantum yield were determined for annatto and anthocyanin. These solutions were evaluated as a possible pH indicator for adulterated milk.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1dcbc8f31a38ac817b1f102c07ebdd9
https://doi.org/10.1364/laop.2022.m3b.4
https://doi.org/10.1364/laop.2022.m3b.4
Thermo-Optical Characterization of Fluorescent Natural Dyes Inserted in Chitosan for Bioapplications
Publikováno v:
Latin America Optics and Photonics (LAOP) Conference 2022.
The focus of this work is to characterize the thermo-optical parameters of diluted chitosan and contaminated with increasing amounts of anthocyanin, a natural dye with a wide range of applications.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e48443015c97066abdeb3f3f8318175
https://doi.org/10.1364/laop.2022.tu4a.31
https://doi.org/10.1364/laop.2022.tu4a.31
Publikováno v:
XIII SEB.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f41470af1d97f16c760d39a18adfd24
https://doi.org/10.47573/xiiiseb.55
https://doi.org/10.47573/xiiiseb.55
Autor:
Acácio A. Andrade, Djalmir N. Messias, Luiz Ricardo Goulart, Larissa R. Lourenço, Tácio T.S. Santos, Viviane Pilla, Sthanley R. de Lima
Publikováno v:
Journal of Photochemistry and Photobiology, Vol 8, Iss, Pp 100080-(2021)
This work reports the thermo-optical and photophysical properties of annatto extracted from the seeds of the tropical shrub Bixa Orellana L. Aqueous natural dyes were extracted using different amounts of NH4OH solution (4 M) and separated into two gr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6985c7c8280d1b1d4d20a9d0c99e1574
https://doi.org/10.1016/j.jpap.2021.100080
https://doi.org/10.1016/j.jpap.2021.100080
Autor:
Sérgio Carlos Zílio, Djalmir N. Messias, Vanessa Mendes, Andrea Antunes, Viviane Pilla, Acácio A. Andrade, Jaqueline O.B. Torres, Sthanley R. de Lima, Noelio O. Dantas
Publikováno v:
Dyes and Pigments. 135:57-63
Anthocyanins are the most important natural dye structure, which are contained in the orange-red-blue colors of several plants, fruits, vegetables and roots. Anthocyanins derived from ornamental plants have shown a higher degree of acylation that cor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::861a47a6c3b01adfd45c547d999e54d2
https://doi.org/10.1016/j.dyepig.2016.06.020
https://doi.org/10.1016/j.dyepig.2016.06.020
Autor:
Elisabete Oliveira, Sérgio Carlos Zílio, Viviane Pilla, Gustavo J. Pereira, Sthanley R. de Lima, Acácio A. Andrade, Carlos Lodeiro, Djalmir N. Messias
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We report on a method to determine fluorescence quantum yield (η) of molecules in solution based on the observation of conical diffraction (CD) patterns induced by thermally driven self-phase modulation (SPM). In this approach, the central part of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1707c94618545433e421227220b461f7
Autor:
Djalmir N. Messias, Fernando Cezar Juliatti, Douglas G. Felisbino, Mário Machado Martins, Manuela R.S. Lima, Roberto Chang, Sthanley R. de Lima, Acácio A. Andrade, Roberto Resende dos Santos, Viviane Pilla, Luiz Ricardo Goulart
Publikováno v:
Journal of Photochemistry and Photobiology B: Biology. 200:111631
In this work, over the course of four seasons (12 months), we have monitored the fluorescence quantum efficiency (η) from two sets (S1 and S2) of fresh natural dye extracts from the leaves of Tradescantia pallida purpurea. The natural dye was extrac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd26d39a2b9454527e9ca8a5f3a5ddfd
https://doi.org/10.1016/j.jphotobiol.2019.111631
https://doi.org/10.1016/j.jphotobiol.2019.111631
Autor:
Acácio A. Andrade, Sthanley R. de Lima, Noelio O. Dantas, Viviane Pilla, Anielle Christine Almeida Silva
Publikováno v:
Chemical Physics Letters. 580:130-134
The present letter reports the thermo-optical properties of functionalized CdSe/CdS magic-sized quantum dots (MSQDs) (sizes 1.9–2.3 nm) with carboxyl (R–COOH) or hydroxyl (R–OH) groups in aqueous solutions. Atomic force microscopy and infrared
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0037086a6e5e45c6d0073ea7d7e43b02