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Sugar Contents and Firmness of Apples Based on Multi-Spectral Imaging Technology
摘要： The paper proposed a prediction method of apple sugar content and firmness based on multi-spectral imaging. Firstly, four characteristic wavelengths (670, 750, 780 and 810 nm) were selected by correlation coefficient method. The gray images of samples at different wavelengths were collected by multi-spectral imaging system, then fitted with Lorenz function, modified Lorenz function, Gaussian function and polynomial function, respectively. It was found that the fitting effect of modified Lorenz function was best. Therefore, the experiment was performed by multiple linear regression and partial least square regression analysis of sugar content and firmness with the fitting parameters of modified Lorenz function. The result showed that the prediction of multiple linear regression model was better than partial least squares regression model. The modeling correction correlation coefficient, calibration standard deviation, the prediction correlation coefficient and predicted standard deviation of sugar content were 0.8568, 0.6736, 0.8395 and 0.7068, respectively. The modeling correction correlation coefficient, calibration standard deviation, the prediction correlation coefficient and the predicted standard deviation of firmness were 0.8660, 0.3275, 0.8407 and 0.3555, respectively. The results also showed that this method was feasible for the prediction of apple sugar content and firmness.
关键词： Firmness,Multi-spectral imaging,Curve fitting,Apple,Multiple linear regression,Sugar content
更新于2025-09-04 15:30:14
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Insight into the Dynamics of Different Fluorophores in the Interior of Aerosol OT Lamellar Structures in Presence of Sugars: From Picosecond-to-Femtosecond Study
摘要： It is well reported that sugar molecules provide different types of stabilization to the biomembranes both in vitro as well as in vivo. In the present article, our focus is to investigate the interactions of two sugar molecules (sucrose and sucralose) with the lamellar structures of aerosol OT (AOT). We have attempted the structural characterization of the lamellae in presence and absence of the sugars with the aid of dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), Fourier transformed infrared spectroscopy (FTIR), polarized optical microscopy (POM) and cryogenic-transmission electron microscopic (Cryo-TEM) techniques. In this study, we have chosen three Coumarin dyes, which show a wide variation of hydrophobicity and performed a combination of steady-state and time-resolved fluorescence measurements to unveil the inner detail of the location of the sugars and their specific interactions with the lamellar structures. Our study reveals that sucrose molecules are present in the interfacial region with a major population whereas the most probable location of sucralose is the interior of the AOT bilayer. Therefore, sucralose molecules probably penetrate the bilayer by decreasing the efficient packing of AOT. The important essence of this study is the location and the interactions of sucralose with the lamellae which may provide a future direction to the transportation of the drug molecules in the biomembrane.
关键词： sugar molecules,fluorescence measurements,lamellar structures,AOT,Coumarin dyes
更新于2025-09-04 15:30:14