The Experts below are selected from a list of 14121 Experts worldwide ranked by ideXlab platform
Ernane Jose Xavier Costa - One of the best experts on this subject based on the ideXlab platform.
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postharvest freezing process assessment of the blueberry structure in three acts bioimpedance color and Granulometry analysis
Lwt - Food Science and Technology, 2021Co-Authors: Hubert Arteaga, Eduardo Robletomartinez, Ana Carolina De Sousa Silva, Sergio Souto, Jacimaria R Batista, Ernane Jose Xavier CostaAbstract:Abstract The bioelectrical impedance, cell Granulometry and the color of the freeze-thawed blueberries were investigated. The blueberries were subjected to freezing at −18 °C for 135 min, during this process, groups were removed to every 9 min, and stored at 4 °C until further analysis. Bioelectrical impedance, color, pH, total soluble solids and cell Granulometry were measured. The characteristics of bioelectrical impedance, cell Granulometry and color were analyzed by computational algorithms, which allowed extracting characteristic of blueberries during the freezing process. The results showed progressive loss of the cellular structure during freezing, this behavior was associated with the bioimpedance parameters. The cells damage also influenced color parameters, and cell Granulometry. The color followed the direction toward darkness and more intense red-blue tones, which suggest the migration of pigments from the blueberry's skin towards the flesh. In conclusion, evaluation of the color and cell Granulometry by computational algorithms with bioelectrical impedance provides a powerful tool for evaluating cell damage in blueberries during the freezing process.
John Alarcon - One of the best experts on this subject based on the ideXlab platform.
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ultrasonically enhanced extraction of bioactive principles from quillaja saponaria molina
Ultrasonics, 2010Co-Authors: L Gaetegarreton, Yolanda Vargashernandez, Maria G Carespacheco, Javier Sainz, John AlarconAbstract:A study of ultrasonic enhancement in the extraction of bioactive principles from Quillaja Saponaria Molina (Quillay) is presented. The effects influencing the extraction process were studied through a two-level factorial design. The effects considered in the experimental design were: Granulometry, extraction time, acoustic Power, raw matter/solvent ratio (concentration) and acoustic impedance. It was found that for aqueous extraction the main factors affecting the ultrasonically-assisted process were: Granulometry, raw matter/solvent ratio and extraction time. The extraction ratio was increased by Ultrasonics effect and a reduction in extraction time was verified without any influence in the product quality. In addition the process can be carried out at lower temperatures than the conventional method. As the process developed uses chips from the branches of trees, and not only the bark, this research contributes to make the saponin exploitation process a sustainable industry.
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international congress on ultrasonics universidad de santiago de chile january 2009ultrasonically assisted extraction of bioactive principles from quillaja saponaria molina
Physics Procedia, 2010Co-Authors: M G Cares, Javier Sainz, Y Vargas, L Gaete, John AlarconAbstract:A study of ultrasonically assisted extraction of bioactive principles from Quillaja Saponaria Molina (Quillay) is presented. To address the problem it was studied the effects that could influence the extraction process through a two-level Factorial Design. The effects considered in the Experimental Design were: Granulometry, Extraction time, Acoustic Power and Acoustic Impedance. The production of the quillaja extracts is done with an aqueous extraction and the process is assisted by an ultrasonic field; no other solvents are used in its production. The final product only incorporates natural ingredients and raw materials, authorized for their use in food manufacturing processes. The principal factors affecting the ultrasonic extraction process were: Granulometry and Extraction time. The enhanced of ultrasonic assisted extraction ratio was measuring the increasing yield of extracted components, the extraction ratio was increased by ultrasonic effect and a reduction in extraction time was verified. In addition the process can be carried out at temperatures lower than the traditional way. The influence of ultrasound on the quality of bioactive principles was examined by HPLC technique and no influence of ultrasound on natural components was found.
Daniel Tessier - One of the best experts on this subject based on the ideXlab platform.
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the relationship between particle size distribution by laser Granulometry and image analysis by transmission electron microscopy in a soil clay fraction
European Journal of Soil Science, 2004Co-Authors: J C Dur, Francoise Elsass, V Chaplain, Daniel TessierAbstract:Summary The aim of this study was to validate the use of laser Granulometry in studies concerning fractions < 2 µm in soils. The study was carried out on the clay fraction of a loamy soil from northeast Thailand. Granulometry by light scattering requires the determination of the refractive indexes of the solid phases. Once these values have been established, laser Granulometry can provide a detailed description of the particle-size distribution within the clay fractions. Laser Granulometry showed a multimodal distribution in the clay fraction of this soil. The analysis of images obtained by transmission electron microscopy provided numerical distributions of soil particles, from which representations by surface area and by volume obtained by laser Granulometry and by transmission electron microscopy could be compared. The representation of particle-size distribution by surface area, assuming that particles are similar to circles, is adequate and, in this range of particle size, minimizes the effect of larger diameters. The representation of the particle-size distribution assuming that particles are similar to platy discs is better than the current representation that assumes particles are similar to spheres. We used transmission electron microscopy to validate laser Granulometry in the fractions < 2 µm. Elemental microanalysis was used to identify the mineralogy of the clay particles: illite, illite-smectite and kaolinite at a magnification of 31 000, corresponding to the clay fraction < 0.8 µm of the particle-size distribution. Quartz and illite were identified at a magnification of 3300, corresponding to the fraction between 0.8 and 2 µm. The mineral constituents of the soil are correlated with the modes of the particle-size distribution. Resume Le sujet de cette etude est de valider l'utilisation de la Granulometry laser au cas des fractions < 2 µm dans les sols. L'exemple choisi est un sol limoneux du nord-est de la Thailande. La granulometrie par diffusion de la lumiere exige de connaitre les indices de refraction de la phase solide. La distribution des diametres des particules est multimodale dans le cas de la fraction argileuse etudiee. L'analyse des images obtenues par la microscopie electronique a transmission permet d'obtenir la distribution en nombre des particules de sols. A l'aide de cette distribution numerique, les distributions exprimees en surface et en volume sont comparees pour la granulometrie laser et la microscopie electronique a transmission. La representation des distributions en surface est correcte et minimise les particules de plus grands diametres. De plus, la representation des distributions des particules basees sur un modele de particules ayant la forme des disques plats conduit a une distribution multimodale plus satisfaisante que la representation courante basee sur une forme spherique. La microscopie electronique a transmission valide les resultats de granulometrie laser pour la fraction du sol < 2 µm. La microanalyse elementaire est utilisee pour identifier la nature des particules d'argiles: illite, illite-smectite et kaolinite au grossissement de 31 000, ces mineraux correspondent a la fraction argileuse dont la distribution en diametres est inferieure a 0.8 µm. Quartz et illite sont identifies au grossissement de 3300, correspondant aux mineraux dont la distribution en diametres est comprise entre 0.8 et 2 µm. Ces constituants mineraux sont correles aux modes de cette distribution granulometrique.
Hubert Arteaga - One of the best experts on this subject based on the ideXlab platform.
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postharvest freezing process assessment of the blueberry structure in three acts bioimpedance color and Granulometry analysis
Lwt - Food Science and Technology, 2021Co-Authors: Hubert Arteaga, Eduardo Robletomartinez, Ana Carolina De Sousa Silva, Sergio Souto, Jacimaria R Batista, Ernane Jose Xavier CostaAbstract:Abstract The bioelectrical impedance, cell Granulometry and the color of the freeze-thawed blueberries were investigated. The blueberries were subjected to freezing at −18 °C for 135 min, during this process, groups were removed to every 9 min, and stored at 4 °C until further analysis. Bioelectrical impedance, color, pH, total soluble solids and cell Granulometry were measured. The characteristics of bioelectrical impedance, cell Granulometry and color were analyzed by computational algorithms, which allowed extracting characteristic of blueberries during the freezing process. The results showed progressive loss of the cellular structure during freezing, this behavior was associated with the bioimpedance parameters. The cells damage also influenced color parameters, and cell Granulometry. The color followed the direction toward darkness and more intense red-blue tones, which suggest the migration of pigments from the blueberry's skin towards the flesh. In conclusion, evaluation of the color and cell Granulometry by computational algorithms with bioelectrical impedance provides a powerful tool for evaluating cell damage in blueberries during the freezing process.
L Gaetegarreton - One of the best experts on this subject based on the ideXlab platform.
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ultrasonically enhanced extraction of bioactive principles from quillaja saponaria molina
Ultrasonics, 2010Co-Authors: L Gaetegarreton, Yolanda Vargashernandez, Maria G Carespacheco, Javier Sainz, John AlarconAbstract:A study of ultrasonic enhancement in the extraction of bioactive principles from Quillaja Saponaria Molina (Quillay) is presented. The effects influencing the extraction process were studied through a two-level factorial design. The effects considered in the experimental design were: Granulometry, extraction time, acoustic Power, raw matter/solvent ratio (concentration) and acoustic impedance. It was found that for aqueous extraction the main factors affecting the ultrasonically-assisted process were: Granulometry, raw matter/solvent ratio and extraction time. The extraction ratio was increased by Ultrasonics effect and a reduction in extraction time was verified without any influence in the product quality. In addition the process can be carried out at lower temperatures than the conventional method. As the process developed uses chips from the branches of trees, and not only the bark, this research contributes to make the saponin exploitation process a sustainable industry.
