Photothermal Techniques Applied to the Thermal and Optical Characterization of Curcuma longa

Alvarado-Noguez, M. L.; Hernández-Aguilar, C.; Domínguez-Pacheco, A.; Cruz‐Orea, A.; Sánchez‐Sinencio, F.

doi:10.1007/s10765-018-2418-8

Cited by 6 publications

(4 citation statements)

References 36 publications

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“…These chemical compounds mainly include three groups: methylene, hydroxyl (-OH) and amino ). However, the chemical composition depends on the cultivation climate, the time of harvest, the biotype of the plant, and finally, the extraction process [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Hair benefits include dandruff reduction, hair strengthening and shine promotion. It is also ideal as an active carrier used in the production of perfumes and bar soaps [2][3][4][5][6][7]. Therefore, the importance of Moringa chemical composition, the variety of methods of preparation and purification, and the use of analytical techniques make necessary to determine their composition.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the Dependence of Thermal Diffusivity with Moringa Concentration by Thermal Lens as a Sensitive Experimental Technique

et al. 2020

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The use of photothermal techniques has become of special importance due to their versatile application in the thermal characterization of materials. Therefore, the thermal lens technique in the mismatched dual-beam mode is an alternative, sensitive and non-evasive tool that was used in this research to determine the thermal diffusivity of Moringa oleifera. The dual arrangement of the thermal lens technique is based on the use of an Ar + Xe excitation laser (422 nm) and a He-Ne laser (632 nm) test laser. Moringa solutions were prepared by green synthesis with different concentrations ranging from 1.56 mg•mL −1 , 3.12 mg•mL −1 , 6.25 mg•mL −1 to 12.50 mg•mL −1. Different optical techniques (UV-vis, FTIR, XPS and EDS) were used to characterize the Moringa leaf powders. Results showed that the increase of thermal diffusivity could be related to the presence of functional groups and metallic elements in Moringa elemental composition. In this work, it was found that the thermal diffusivity of Moringa increases with increasing concentration. This study will be useful for application in heat transport and drug release.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of the Dependence of Thermal Diffusivity with Moringa Concentration by Thermal Lens as a Sensitive Experimental Technique

et al. 2020

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“…Therefore, the difference in the time to reach the gas layer, in the photoacoustic cell, produces a phase shift ϕ between the two signals. By using the Phase Resolved Method it is possible to separate different absorption bands in a sample with several components ( Alvarado-Noguez et al, 2018 ). Here it is also worth mentioning that photoacoustic spectroscopy makes it possible to obtain the non-radiative relaxation time of molecules, which are related to some optical absorption band, by means of the photoacoustic signal phase ( Domínguez-Pacheco et al, 2017 ).…”

Section: Resultsmentioning

confidence: 99%

Photoacoustic characterization of wheat bread mixed with Moringa oleifera.

Hernández-Aguilar

Domínguez-Pacheco

Valderrama-Bravo

et al. 2021

Current Research in Food Science

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Photoacoustic spectroscopy is applied to evaluate the impact of Moringa at different concentrations (0, 1.25, 2.5, 5 and 10%) on the elaboration, sanity, texture, and color of wheat bread. It was found that: i) Photoacoustic signal amplitude values of bread significantly increase from 37 to 90% when moringa powder concentration raises from 1.25% to 10%, at 300 nm wavelength. ii) Comparing the photoacoustic signal values at 300, 330, and 370 nm wavelengths, produced by the different bread types, there were statistically significant differences. iii) The sanitary quality of bread mixed with a 2.5% of moringa is relatively higher than the ones obtained for other concentrations, such that the number of fungal colonies were reduced by 99% in comparison with the control bread without moringa, after six days of storage. Moringa at 2.5% of concentration could thus improve the sanitary quality of wheat bread. iv) The addition of moringa for making bread slows down its textural changes (hardness, elasticity, cohesiveness, resilience, and chewiness) during storage. v) Finally, the highest correlation between the photoacoustic amplitude and the moringa concentration occurs at the wavelengths of 300 and 330 nm, which could be related to significant changes in the content of flavonoids and phenolic acids.

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“…The sample is illuminated with modulated and monochromatic light and, by varying the incident wavelength, it is possible to obtain the photoacoustic spectrum of the sample, which is proportional to its optical absorption spectrum. 30,32…”

Section: Introductionmentioning

confidence: 99%

Hepatoprotective Effect Assessment of C-Phycocyanin on Hepatocellular Carcinoma Rat Model by Using Photoacoustic Spectroscopy

Lizeth,

Vanessa,

María del Rocio

et al. 2024

Appl Spectrosc

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Hepatocellular carcinoma (HCC) is the most common primary neoplasia of the liver with elevated mortality. Experimental treatment with antioxidants has a beneficial effect on the experimental models of HCC. Arthrospira maxima (spirulina) and its phycocyanin have antitumoral action on different tumoral cells. However, it is unknown whether phycocyanin is the responsible molecule for the antitumoral effect on HCC. Photoacoustic spectroscopy (PAS) stands out among other spectroscopy techniques for its versatility of samples analyzed. This technique makes it possible to obtain the optical absorption spectrum of solid or liquid, dark or transparent samples. Previous studies report that assessing liver damage in rats produced by the modified resistant hepatocyte model (MRHM) is possible by analyzing their blood optical absorption spectrum. This study aimed to investigate, by PAS, the effect of phycocyanin obtained from spirulina on hepatic dysfunction. The optical absorption spectra analysis of the rat blood indicates the damage level induced by the MRHM group, being in concordance with the carried out biological conventional studies results, indicating an increase in the activity of hepatic enzymes, oxidative stress, Bax/Bcl2 ratio, cdk2, and AKT2 expression results, with a reduction in p53 expression. Also, PAS results suggest that phycocyanin decreases induced damage, due to the prevention of the Bax, AKT2, and p53 altered expression and the tumor progression in a HCC rat model.

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Photothermal Techniques Applied to the Thermal and Optical Characterization of Curcuma longa

Cited by 6 publications

References 36 publications

Determination of the Dependence of Thermal Diffusivity with Moringa Concentration by Thermal Lens as a Sensitive Experimental Technique

Determination of the Dependence of Thermal Diffusivity with Moringa Concentration by Thermal Lens as a Sensitive Experimental Technique

Photoacoustic characterization of wheat bread mixed with Moringa oleifera.

Hepatoprotective Effect Assessment of C-Phycocyanin on Hepatocellular Carcinoma Rat Model by Using Photoacoustic Spectroscopy

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