The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Naoya Hiruma - One of the best experts on this subject based on the ideXlab platform.
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non destructive estimation of atp contents and plate count on pork meat surface by uv vis Reflectance Spectrum analysis
Journal of Food Engineering, 2012Co-Authors: N Oto, Seiichi Oshita, S Kawagishi, Yoshio Makino, Yoshinori Kawagoe, Muhammad Imran Alhaq, Satoshi Shinozaki, Naoya HirumaAbstract:Abstract To develop a real-time and non-destructive sanitation monitoring at a meat processing plant, UV–Vis Reflectance Spectrum analysis was applied. The sample was the lean part of a pork loin. The UV–Vis Reflectance spectra and the factors of microbial contamination (i.e. plate count and ATP content) on the pork meat surface were measured for 3 or 4 days. The 2nd derivative of Reflectance at 318 and 578 nm gave a high correlation with log 10 (plate count) or log 10 (ATP content), because the Reflectance Spectrum at 318 nm is probably related to ATP absorption and that at 578 nm is related to myoglobin pigments. Moreover, Partial least squares regression (PLSR) was developed and log 10 (plate count) and log 10 (ATP content) were predicted from the 2nd derivative of Reflectance. The determination coefficients ( R 2 ) for calibration were 0.95–0.99. These results indicate the potential of utilizing UV–Vis Reflectance Spectrum analysis for cleanness assessment.
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monitoring of atp and viable cells on meat surface by uv vis Reflectance Spectrum analysis
Journal of Food Engineering, 2011Co-Authors: Seiichi Oshita, S Kawagishi, Yoshio Makino, Yoshinori Kawagoe, Muhammad Imran Alhaq, Satoshi Shinozaki, Naoya HirumaAbstract:Abstract Cleanliness monitoring at slaughterhouses depend on traditional methods, e.g., visual inspection or swabbing. The visual inspection is not always accurate. Swabbing requires skilled workers and further plate count or ATP bioluminescence technique. To solve these problems, a rapid technique based on non-destructive UV–Vis Reflectance was developed to monitor the ATP and viable cells. Samples were lean part of pork loin. The samples stored at 15 °C were analyzed at 0, 24, 48, 72, 84 and 96 h for ATP, plate count and UV–Vis Reflectance. The Reflectance spectra were measured from 240 to 540 nm at 20 °C, and then the area of 40 × 40 mm2 of the sample surface was swabbed for the determination of plate count and ATP amount. The plate count on the sample surface increased from the initial count of 29 to 3.2 × 107 CFU/cm2 after 84 h. The ATP amount also increased with time from the initial amount of 9.2 × 10−15 to 2.8 × 10−10 mol/cm2 after 84 h. The linear relationship was observed between the ATP amount and plate count with the determination coefficient of 0.95. The 2nd derivative of raw spectra gave a high correlation for the first 48 h with both ATP amount and viable cell count showing the determination coefficient of 0.89 and 0.83, respectively at 318 nm. The results strongly suggested that the UV–Vis Reflectance Spectrum analysis could be used as the real-time monitoring of ATP and/or plate count on meat surface with the optimal wavelength.
Seiichi Oshita - One of the best experts on this subject based on the ideXlab platform.
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non destructive estimation of atp contents and plate count on pork meat surface by uv vis Reflectance Spectrum analysis
Journal of Food Engineering, 2012Co-Authors: N Oto, Seiichi Oshita, S Kawagishi, Yoshio Makino, Yoshinori Kawagoe, Muhammad Imran Alhaq, Satoshi Shinozaki, Naoya HirumaAbstract:Abstract To develop a real-time and non-destructive sanitation monitoring at a meat processing plant, UV–Vis Reflectance Spectrum analysis was applied. The sample was the lean part of a pork loin. The UV–Vis Reflectance spectra and the factors of microbial contamination (i.e. plate count and ATP content) on the pork meat surface were measured for 3 or 4 days. The 2nd derivative of Reflectance at 318 and 578 nm gave a high correlation with log 10 (plate count) or log 10 (ATP content), because the Reflectance Spectrum at 318 nm is probably related to ATP absorption and that at 578 nm is related to myoglobin pigments. Moreover, Partial least squares regression (PLSR) was developed and log 10 (plate count) and log 10 (ATP content) were predicted from the 2nd derivative of Reflectance. The determination coefficients ( R 2 ) for calibration were 0.95–0.99. These results indicate the potential of utilizing UV–Vis Reflectance Spectrum analysis for cleanness assessment.
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monitoring of atp and viable cells on meat surface by uv vis Reflectance Spectrum analysis
Journal of Food Engineering, 2011Co-Authors: Seiichi Oshita, S Kawagishi, Yoshio Makino, Yoshinori Kawagoe, Muhammad Imran Alhaq, Satoshi Shinozaki, Naoya HirumaAbstract:Abstract Cleanliness monitoring at slaughterhouses depend on traditional methods, e.g., visual inspection or swabbing. The visual inspection is not always accurate. Swabbing requires skilled workers and further plate count or ATP bioluminescence technique. To solve these problems, a rapid technique based on non-destructive UV–Vis Reflectance was developed to monitor the ATP and viable cells. Samples were lean part of pork loin. The samples stored at 15 °C were analyzed at 0, 24, 48, 72, 84 and 96 h for ATP, plate count and UV–Vis Reflectance. The Reflectance spectra were measured from 240 to 540 nm at 20 °C, and then the area of 40 × 40 mm2 of the sample surface was swabbed for the determination of plate count and ATP amount. The plate count on the sample surface increased from the initial count of 29 to 3.2 × 107 CFU/cm2 after 84 h. The ATP amount also increased with time from the initial amount of 9.2 × 10−15 to 2.8 × 10−10 mol/cm2 after 84 h. The linear relationship was observed between the ATP amount and plate count with the determination coefficient of 0.95. The 2nd derivative of raw spectra gave a high correlation for the first 48 h with both ATP amount and viable cell count showing the determination coefficient of 0.89 and 0.83, respectively at 318 nm. The results strongly suggested that the UV–Vis Reflectance Spectrum analysis could be used as the real-time monitoring of ATP and/or plate count on meat surface with the optimal wavelength.
Hanjung Kim - One of the best experts on this subject based on the ideXlab platform.
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change in Reflectance Spectrum of nanoporous silicon by gas adsorption
Physica E-low-dimensional Systems & Nanostructures, 2019Co-Authors: Youngyou Kim, Jeonghwa Lee, Eunjun Ahn, Hanjung KimAbstract:Abstract In this paper, we propose a new strategy to improve the performance of nanoporous silicon (np-Si) layer-based optical gas sensors. For this, we fabricated the np-Si layer on a p+-type silicon substrate and modified the surface wettability of the np-Si layer with oxygen (O2) plasma treatment. We then compared the changes in the Reflectance spectra of the O2 plasma-treated np-Si layer that had been exposed to various organic vapors with that of the untreated np-Si layer. The results by measuring the contact angle on the surface confirmed that the surface of the O2 plasma-treated np-Si layer was hydrophilic. During the exposure to the organic vapors, there was a reversible red-shift phenomenon in the Reflectance Spectrum. This study confirmed that the red-shift can be attributed to the changes in the refractive index induced by the capillary condensation of the organic vapor within the nanopores of the np-Si layer. The changes in the Reflectance spectra of the hydrophilic-treated np-Si layer were more noticeable than those in the untreated np-Si layer. These experimental results indicate that hydrophilic surface treatment can improve the selectivity and sensitivity of np-Si layer-based gas sensors.
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sensing characteristics of the organic vapors according to the Reflectance Spectrum in the porous silicon multilayer structure
Sensors and Actuators A-physical, 2011Co-Authors: Hanjung Kim, Youngyou Kim, Kiwon LeeAbstract:Abstract We fabricated a porous silicon multilayer and investigated its Reflectance spectra before, during, and after exposure to various organic vapors. During exposure of the porous silicon multilayer to isopropanol, ethanol, methanol, and acetone vapors, the Reflectance peak shifted toward longer wavelengths by about 5, 12, 26, and 39 nm, respectively. The shift of the Reflectance peak arises from refractive index changes induced by capillary condensation of the organic vapor in the pores of the porous silicon multilayer. In addition, we observed that the shift value of the Reflectance peak increased with increasing organic solvent concentration in the organic solvent-water mixture. After removing the organic vapor, the Reflectance Spectrum returned completely to its original state.
Yoshio Makino - One of the best experts on this subject based on the ideXlab platform.
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non destructive estimation of atp contents and plate count on pork meat surface by uv vis Reflectance Spectrum analysis
Journal of Food Engineering, 2012Co-Authors: N Oto, Seiichi Oshita, S Kawagishi, Yoshio Makino, Yoshinori Kawagoe, Muhammad Imran Alhaq, Satoshi Shinozaki, Naoya HirumaAbstract:Abstract To develop a real-time and non-destructive sanitation monitoring at a meat processing plant, UV–Vis Reflectance Spectrum analysis was applied. The sample was the lean part of a pork loin. The UV–Vis Reflectance spectra and the factors of microbial contamination (i.e. plate count and ATP content) on the pork meat surface were measured for 3 or 4 days. The 2nd derivative of Reflectance at 318 and 578 nm gave a high correlation with log 10 (plate count) or log 10 (ATP content), because the Reflectance Spectrum at 318 nm is probably related to ATP absorption and that at 578 nm is related to myoglobin pigments. Moreover, Partial least squares regression (PLSR) was developed and log 10 (plate count) and log 10 (ATP content) were predicted from the 2nd derivative of Reflectance. The determination coefficients ( R 2 ) for calibration were 0.95–0.99. These results indicate the potential of utilizing UV–Vis Reflectance Spectrum analysis for cleanness assessment.
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monitoring of atp and viable cells on meat surface by uv vis Reflectance Spectrum analysis
Journal of Food Engineering, 2011Co-Authors: Seiichi Oshita, S Kawagishi, Yoshio Makino, Yoshinori Kawagoe, Muhammad Imran Alhaq, Satoshi Shinozaki, Naoya HirumaAbstract:Abstract Cleanliness monitoring at slaughterhouses depend on traditional methods, e.g., visual inspection or swabbing. The visual inspection is not always accurate. Swabbing requires skilled workers and further plate count or ATP bioluminescence technique. To solve these problems, a rapid technique based on non-destructive UV–Vis Reflectance was developed to monitor the ATP and viable cells. Samples were lean part of pork loin. The samples stored at 15 °C were analyzed at 0, 24, 48, 72, 84 and 96 h for ATP, plate count and UV–Vis Reflectance. The Reflectance spectra were measured from 240 to 540 nm at 20 °C, and then the area of 40 × 40 mm2 of the sample surface was swabbed for the determination of plate count and ATP amount. The plate count on the sample surface increased from the initial count of 29 to 3.2 × 107 CFU/cm2 after 84 h. The ATP amount also increased with time from the initial amount of 9.2 × 10−15 to 2.8 × 10−10 mol/cm2 after 84 h. The linear relationship was observed between the ATP amount and plate count with the determination coefficient of 0.95. The 2nd derivative of raw spectra gave a high correlation for the first 48 h with both ATP amount and viable cell count showing the determination coefficient of 0.89 and 0.83, respectively at 318 nm. The results strongly suggested that the UV–Vis Reflectance Spectrum analysis could be used as the real-time monitoring of ATP and/or plate count on meat surface with the optimal wavelength.
Satoshi Shinozaki - One of the best experts on this subject based on the ideXlab platform.
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non destructive estimation of atp contents and plate count on pork meat surface by uv vis Reflectance Spectrum analysis
Journal of Food Engineering, 2012Co-Authors: N Oto, Seiichi Oshita, S Kawagishi, Yoshio Makino, Yoshinori Kawagoe, Muhammad Imran Alhaq, Satoshi Shinozaki, Naoya HirumaAbstract:Abstract To develop a real-time and non-destructive sanitation monitoring at a meat processing plant, UV–Vis Reflectance Spectrum analysis was applied. The sample was the lean part of a pork loin. The UV–Vis Reflectance spectra and the factors of microbial contamination (i.e. plate count and ATP content) on the pork meat surface were measured for 3 or 4 days. The 2nd derivative of Reflectance at 318 and 578 nm gave a high correlation with log 10 (plate count) or log 10 (ATP content), because the Reflectance Spectrum at 318 nm is probably related to ATP absorption and that at 578 nm is related to myoglobin pigments. Moreover, Partial least squares regression (PLSR) was developed and log 10 (plate count) and log 10 (ATP content) were predicted from the 2nd derivative of Reflectance. The determination coefficients ( R 2 ) for calibration were 0.95–0.99. These results indicate the potential of utilizing UV–Vis Reflectance Spectrum analysis for cleanness assessment.
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monitoring of atp and viable cells on meat surface by uv vis Reflectance Spectrum analysis
Journal of Food Engineering, 2011Co-Authors: Seiichi Oshita, S Kawagishi, Yoshio Makino, Yoshinori Kawagoe, Muhammad Imran Alhaq, Satoshi Shinozaki, Naoya HirumaAbstract:Abstract Cleanliness monitoring at slaughterhouses depend on traditional methods, e.g., visual inspection or swabbing. The visual inspection is not always accurate. Swabbing requires skilled workers and further plate count or ATP bioluminescence technique. To solve these problems, a rapid technique based on non-destructive UV–Vis Reflectance was developed to monitor the ATP and viable cells. Samples were lean part of pork loin. The samples stored at 15 °C were analyzed at 0, 24, 48, 72, 84 and 96 h for ATP, plate count and UV–Vis Reflectance. The Reflectance spectra were measured from 240 to 540 nm at 20 °C, and then the area of 40 × 40 mm2 of the sample surface was swabbed for the determination of plate count and ATP amount. The plate count on the sample surface increased from the initial count of 29 to 3.2 × 107 CFU/cm2 after 84 h. The ATP amount also increased with time from the initial amount of 9.2 × 10−15 to 2.8 × 10−10 mol/cm2 after 84 h. The linear relationship was observed between the ATP amount and plate count with the determination coefficient of 0.95. The 2nd derivative of raw spectra gave a high correlation for the first 48 h with both ATP amount and viable cell count showing the determination coefficient of 0.89 and 0.83, respectively at 318 nm. The results strongly suggested that the UV–Vis Reflectance Spectrum analysis could be used as the real-time monitoring of ATP and/or plate count on meat surface with the optimal wavelength.