The Experts below are selected from a list of 120588 Experts worldwide ranked by ideXlab platform
Chi-young Choi - One of the best experts on this subject based on the ideXlab platform.
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Characterization of Mechanical Damage on structural and electrical properties of silicon wafers
Solid-State Electronics, 1999Co-Authors: Chi-young Choi, Joon-hyung Lee, Sang-hee ChoAbstract:Abstract The effect of artificial Mechanical Damage in Czochralski silicon wafers was studied by measuring the structural and electrical characteristics of the wafers. A liquid honing method was used to induce Mechanical Damage and the Damage grade was varied by controlling process parameters. Surface microroughness of the Damaged sample was analyzed using an atomic force microscope (AFM). The wet oxidation/preferential etch method, photo-acoustic displacement (PAD) method and the minority carrier lifetime with a laser excitation/microwave reflection photoconductance decay technique were used to characterize the intensity of Mechanical Damage in silicon wafers. As the degree of Mechanical Damage increases, the density of oxygen induced stacking faults (OISF) is increased, while the depth of OISF generation is almost independent of Damage grade. The minority carrier lifetime is inversely proportional to the Mechanical Damage grade, while the PAD values are proportionally increased. Other experimental results are discussed from a viewpoint of a structure–property relationship.
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Evaluation of Mechanical Damage by high resolution x-ray diffraction and minority carrier recombination lifetime in silicon wafer
Journal of Applied Physics, 1998Co-Authors: Chi-young ChoiAbstract:In Czochralski silicon wafers, the effect of Mechanical back side Damage was systematically analyzed by x-ray diffuse scattering and minority carrier recombination lifetime measurements. X-ray section topography and wet oxidation/preferential etch methods were also employed. A liquid honing method was used to induce Mechanical Damage, and the Damage grade was varied by controlling process parameters. A high resolution x-ray analysis of the samples was carried out before and after heat treatment at 1100 °C for 60 min. The magnitude of diffuse scattering was analyzed quantitatively by integrating the excess intensity of diffuse scattering into a reciprocal space map and its correlation with the Mechanical Damage was examined. As the grade of Mechanical Damage increased, the degree of diffuse scattering increases and minority carrier recombination lifetime decreases, suggesting the generation of more defects. We discuss other experimental results from the viewpoint of the structure–property relationship.
Daniel Valero - One of the best experts on this subject based on the ideXlab platform.
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Role of calcium and heat treatments in alleviating physiological changes induced by Mechanical Damage in plum
Postharvest Biology and Technology, 2004Co-Authors: María Serrano, Domingo Martínez-romero, Salvador Castillo, Fabián Guillén, Daniel ValeroAbstract:Abstract Plum (Prunus salicina Lindl. cv. Blackstar) fruit were harvested at the pre-climacteric stage of ripeness. After being treated with calcium (calcium chloride at 1 mM) or heat at 45 °C (hot water dip immersion for 10 min), fruit were Mechanically Damaged at three equatorial zones with a given force of 50 N and then held at 20 °C under controlled conditions. Results revealed that both treatments led to a reduction of the Mechanical Damage, and in turn alleviated the physiological responses that occurred in Mechanically Damaged plums. A reduction of “wound-induced” ethylene and respiration rates, which were detected just a few hours following Mechanical Damage, was observed for treated plums. During storage, Mechanical Damage advanced the climacteric ethylene and respiration peaks, while a delay in those plums previously treated either with calcium or heat was found. Thereafter, control plums exhibited an accumulation of free spermidine and abscisic acid in Mechanically Damaged flesh, which could be considered a physiological response to Mechanical stress. These changes were minimised in calcium- and heat-treated Damaged plums, indicating that these treatments would induce a significant resistance to Mechanical Damage in plum.
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Effects of Postharvest Putrescine Treatment on Extending Shelf Life and Reducing Mechanical Damage in Apricot
Journal of Food Science, 2002Co-Authors: Domingo Martínez-romero, María Serrano, A. Carbonell, Lorenzo Burgos, F. Riquelme, Daniel ValeroAbstract:: Apricots (Prunus armeniaca L. cv Mauricio) harvested at commercial ripening stage were treated with putrescine (1 mM), then Mechanically Damaged with a 25 N force and stored at 10 °C for 6 d. Putrescine treatment increased fruit firmness and reduced the bruising zones caused by the Mechanical Damage. Putrescine-treated fruits (both Damaged and nonDamaged) showed different physiological behavior than controls. Color change, weight loss, ethylene emission, and respiration rate were reduced in putrescine-treated fruits. The most remarkable effect of the Mechanical Damage was the significant increase in spermidine concentrations found after the compression in control apricots, which could be considered as a physiological marker of Mechanical Damage.
Annette L. Bunge - One of the best experts on this subject based on the ideXlab platform.
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Characterization of Damaged skin by impedance spectroscopy: Mechanical Damage.
Pharmaceutical research, 2013Co-Authors: Erick A. White, Mark E. Orazem, Annette L. BungeAbstract:Purpose Electrochemical impedance spectroscopy is a convenient method that has been used to characterize skin barrier function, which affects drug delivery into and through the skin. The objective of this study was to relate changes in skin barrier function arising from Mechanical Damage to changes in the impedance spectra. These observations are compared in a companion paper to changes in chemically Damaged skin.
Domingo Martínez-romero - One of the best experts on this subject based on the ideXlab platform.
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Role of calcium and heat treatments in alleviating physiological changes induced by Mechanical Damage in plum
Postharvest Biology and Technology, 2004Co-Authors: María Serrano, Domingo Martínez-romero, Salvador Castillo, Fabián Guillén, Daniel ValeroAbstract:Abstract Plum (Prunus salicina Lindl. cv. Blackstar) fruit were harvested at the pre-climacteric stage of ripeness. After being treated with calcium (calcium chloride at 1 mM) or heat at 45 °C (hot water dip immersion for 10 min), fruit were Mechanically Damaged at three equatorial zones with a given force of 50 N and then held at 20 °C under controlled conditions. Results revealed that both treatments led to a reduction of the Mechanical Damage, and in turn alleviated the physiological responses that occurred in Mechanically Damaged plums. A reduction of “wound-induced” ethylene and respiration rates, which were detected just a few hours following Mechanical Damage, was observed for treated plums. During storage, Mechanical Damage advanced the climacteric ethylene and respiration peaks, while a delay in those plums previously treated either with calcium or heat was found. Thereafter, control plums exhibited an accumulation of free spermidine and abscisic acid in Mechanically Damaged flesh, which could be considered a physiological response to Mechanical stress. These changes were minimised in calcium- and heat-treated Damaged plums, indicating that these treatments would induce a significant resistance to Mechanical Damage in plum.
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Effects of Postharvest Putrescine Treatment on Extending Shelf Life and Reducing Mechanical Damage in Apricot
Journal of Food Science, 2002Co-Authors: Domingo Martínez-romero, María Serrano, A. Carbonell, Lorenzo Burgos, F. Riquelme, Daniel ValeroAbstract:: Apricots (Prunus armeniaca L. cv Mauricio) harvested at commercial ripening stage were treated with putrescine (1 mM), then Mechanically Damaged with a 25 N force and stored at 10 °C for 6 d. Putrescine treatment increased fruit firmness and reduced the bruising zones caused by the Mechanical Damage. Putrescine-treated fruits (both Damaged and nonDamaged) showed different physiological behavior than controls. Color change, weight loss, ethylene emission, and respiration rate were reduced in putrescine-treated fruits. The most remarkable effect of the Mechanical Damage was the significant increase in spermidine concentrations found after the compression in control apricots, which could be considered as a physiological marker of Mechanical Damage.
María Serrano - One of the best experts on this subject based on the ideXlab platform.
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Role of calcium and heat treatments in alleviating physiological changes induced by Mechanical Damage in plum
Postharvest Biology and Technology, 2004Co-Authors: María Serrano, Domingo Martínez-romero, Salvador Castillo, Fabián Guillén, Daniel ValeroAbstract:Abstract Plum (Prunus salicina Lindl. cv. Blackstar) fruit were harvested at the pre-climacteric stage of ripeness. After being treated with calcium (calcium chloride at 1 mM) or heat at 45 °C (hot water dip immersion for 10 min), fruit were Mechanically Damaged at three equatorial zones with a given force of 50 N and then held at 20 °C under controlled conditions. Results revealed that both treatments led to a reduction of the Mechanical Damage, and in turn alleviated the physiological responses that occurred in Mechanically Damaged plums. A reduction of “wound-induced” ethylene and respiration rates, which were detected just a few hours following Mechanical Damage, was observed for treated plums. During storage, Mechanical Damage advanced the climacteric ethylene and respiration peaks, while a delay in those plums previously treated either with calcium or heat was found. Thereafter, control plums exhibited an accumulation of free spermidine and abscisic acid in Mechanically Damaged flesh, which could be considered a physiological response to Mechanical stress. These changes were minimised in calcium- and heat-treated Damaged plums, indicating that these treatments would induce a significant resistance to Mechanical Damage in plum.
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Effects of Postharvest Putrescine Treatment on Extending Shelf Life and Reducing Mechanical Damage in Apricot
Journal of Food Science, 2002Co-Authors: Domingo Martínez-romero, María Serrano, A. Carbonell, Lorenzo Burgos, F. Riquelme, Daniel ValeroAbstract:: Apricots (Prunus armeniaca L. cv Mauricio) harvested at commercial ripening stage were treated with putrescine (1 mM), then Mechanically Damaged with a 25 N force and stored at 10 °C for 6 d. Putrescine treatment increased fruit firmness and reduced the bruising zones caused by the Mechanical Damage. Putrescine-treated fruits (both Damaged and nonDamaged) showed different physiological behavior than controls. Color change, weight loss, ethylene emission, and respiration rate were reduced in putrescine-treated fruits. The most remarkable effect of the Mechanical Damage was the significant increase in spermidine concentrations found after the compression in control apricots, which could be considered as a physiological marker of Mechanical Damage.
