Juan M Bueno - Academia.edu (original) (raw)
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Papers by Juan M Bueno
Polymers, Aug 11, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
BioMed Research International, Jul 29, 2022
Normal aging affects the different structures of teeth, in particular, the dentine. These changes... more Normal aging affects the different structures of teeth, in particular, the dentine. These changes are useful in forensic disciplines as a tool for age estimation. Although multiphoton (MP) microscopy has been used to explore dental pieces, a relationship between age and MP response of the human dentine has not been proposed yet. The relationship between MP signals and natural dentine aging is investigated herein. An index of age (INAG) combining two-photon excitation fluorescence (TPEF) and second harmonic generation (SHG) images has been used to quantify these changes. The results show that the INAG significantly decreases with age. Moreover, peritubular dentine size and collagen internal properties are also modified with age. This information confirms the usefulness of this technique in forensic age estimation after disasters (natural or manmade) with a lack of comprehensive fingerprint database. Courts and other government authorities might also benefit from this tool when the official age of individuals under special circumstances is required for legal or medical reasons.
Photonics
The retinal and the choroidal thickness were measured at four locations along the horizontal dire... more The retinal and the choroidal thickness were measured at four locations along the horizontal direction (foveola, one nasal to the fovea and two temporal) in a group of 43 young adults (mean age: 27.1 ± 3.9 years), with ocular refraction ranging from emmetropia to high myopia (0 to −10D). Thickness values were obtained from OCT images centered at the foveal depression. The retinal thickness exhibited a correlation with refraction at all eccentricities but not at the fovea. When different subgroups of refraction were considered, the analysis of such correlations indicated that only the retinal thickness in the group of high myopia (refraction ≤ −6D) was statistically different from the other two groups (emmetropes: [−0.5, 0] D, and myopes: (−6, −0.5) D). No significant differences were found between emmetropic and myopic groups. In contrast to the retina, the choroidal thickness exhibited a significant correlation with refraction at the fovea, although such dependency only stood for h...
Investigative Ophthalmology & Visual Science, 2003
Investigative Ophthalmology & Visual Science, Jun 11, 2015
Investigative Ophthalmology & Visual Science, Jun 16, 2013
Investigative Ophthalmology & Visual Science, Mar 26, 2012
Investigative Ophthalmology & Visual Science, May 10, 2007
Investigative Ophthalmology & Visual Science, 2006
Investigative Ophthalmology & Visual Science, 2002
Investigative Ophthalmology & Visual Science, 2013
Investigative Ophthalmology & Visual Science, 2015
Investigative Ophthalmology & Visual Science, 2007
Investigative Ophthalmology & Visual Science, 2009
Investigative Ophthalmology & Visual Science, 2004
Investigative Ophthalmology & Visual Science, 2009
arXiv: Instrumentation and Detectors, 2019
Neutrinoless double beta decay ($\beta\beta0\nu$) is a putative nuclear decay that can occur if, ... more Neutrinoless double beta decay ($\beta\beta0\nu$) is a putative nuclear decay that can occur if, and only if, neutrinos are their own antiparticles. Due to the smallness of neutrino masses, the lifetime of betabeta0nu\beta\beta0\nubetabeta0nu is expected to be larger than 102610^{26}1026 yr, and the tiny expected signals are deeply buried in backgrounds associated with the natural radioactive chains, whose characteristic lifetime is sixteen orders of magnitude faster. Future experiments aiming to explore lifetimes several orders of magnitude larger will require the development of new experimental techniques to suppress those backgrounds. Since no known background processes converts xenon to barium, detection of the daughter ion in candidate decay events effectively eliminates backgrounds. It has been recently proposed that a xenon gas time projection chamber could unambiguously tag the betabeta0nu\beta\beta0\nubetabeta0nu decay Xe136rightarrowBa2++2e−(+2nu)Xe^{136} \rightarrow Ba^{2+} + 2e^- (+2 \nu)Xe136rightarrowBa2++2e−(+2nu) by detecting the resulting Ba2+Ba^{2+}Ba2+ ion in a single-a...
Investigative Ophthalmology & Visual Science, 2007
Polymers, Aug 11, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
BioMed Research International, Jul 29, 2022
Normal aging affects the different structures of teeth, in particular, the dentine. These changes... more Normal aging affects the different structures of teeth, in particular, the dentine. These changes are useful in forensic disciplines as a tool for age estimation. Although multiphoton (MP) microscopy has been used to explore dental pieces, a relationship between age and MP response of the human dentine has not been proposed yet. The relationship between MP signals and natural dentine aging is investigated herein. An index of age (INAG) combining two-photon excitation fluorescence (TPEF) and second harmonic generation (SHG) images has been used to quantify these changes. The results show that the INAG significantly decreases with age. Moreover, peritubular dentine size and collagen internal properties are also modified with age. This information confirms the usefulness of this technique in forensic age estimation after disasters (natural or manmade) with a lack of comprehensive fingerprint database. Courts and other government authorities might also benefit from this tool when the official age of individuals under special circumstances is required for legal or medical reasons.
Photonics
The retinal and the choroidal thickness were measured at four locations along the horizontal dire... more The retinal and the choroidal thickness were measured at four locations along the horizontal direction (foveola, one nasal to the fovea and two temporal) in a group of 43 young adults (mean age: 27.1 ± 3.9 years), with ocular refraction ranging from emmetropia to high myopia (0 to −10D). Thickness values were obtained from OCT images centered at the foveal depression. The retinal thickness exhibited a correlation with refraction at all eccentricities but not at the fovea. When different subgroups of refraction were considered, the analysis of such correlations indicated that only the retinal thickness in the group of high myopia (refraction ≤ −6D) was statistically different from the other two groups (emmetropes: [−0.5, 0] D, and myopes: (−6, −0.5) D). No significant differences were found between emmetropic and myopic groups. In contrast to the retina, the choroidal thickness exhibited a significant correlation with refraction at the fovea, although such dependency only stood for h...
Investigative Ophthalmology & Visual Science, 2003
Investigative Ophthalmology & Visual Science, Jun 11, 2015
Investigative Ophthalmology & Visual Science, Jun 16, 2013
Investigative Ophthalmology & Visual Science, Mar 26, 2012
Investigative Ophthalmology & Visual Science, May 10, 2007
Investigative Ophthalmology & Visual Science, 2006
Investigative Ophthalmology & Visual Science, 2002
Investigative Ophthalmology & Visual Science, 2013
Investigative Ophthalmology & Visual Science, 2015
Investigative Ophthalmology & Visual Science, 2007
Investigative Ophthalmology & Visual Science, 2009
Investigative Ophthalmology & Visual Science, 2004
Investigative Ophthalmology & Visual Science, 2009
arXiv: Instrumentation and Detectors, 2019
Neutrinoless double beta decay ($\beta\beta0\nu$) is a putative nuclear decay that can occur if, ... more Neutrinoless double beta decay ($\beta\beta0\nu$) is a putative nuclear decay that can occur if, and only if, neutrinos are their own antiparticles. Due to the smallness of neutrino masses, the lifetime of betabeta0nu\beta\beta0\nubetabeta0nu is expected to be larger than 102610^{26}1026 yr, and the tiny expected signals are deeply buried in backgrounds associated with the natural radioactive chains, whose characteristic lifetime is sixteen orders of magnitude faster. Future experiments aiming to explore lifetimes several orders of magnitude larger will require the development of new experimental techniques to suppress those backgrounds. Since no known background processes converts xenon to barium, detection of the daughter ion in candidate decay events effectively eliminates backgrounds. It has been recently proposed that a xenon gas time projection chamber could unambiguously tag the betabeta0nu\beta\beta0\nubetabeta0nu decay Xe136rightarrowBa2++2e−(+2nu)Xe^{136} \rightarrow Ba^{2+} + 2e^- (+2 \nu)Xe136rightarrowBa2++2e−(+2nu) by detecting the resulting Ba2+Ba^{2+}Ba2+ ion in a single-a...
Investigative Ophthalmology & Visual Science, 2007