The Experts below are selected from a list of 255 Experts worldwide ranked by ideXlab platform
Takayuki Tomida - One of the best experts on this subject based on the ideXlab platform.
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Distribution Map of Plant Fluorescence Spectrum in Three-Dimensions Created by a Laser-Induced Fluorescence Spectrum (LIFS) Lidar Observations
EPJ Web of Conferences, 2020Co-Authors: S. Utsunomiya, Yasunori Saito, Y. Kumagai, Takayuki TomidaAbstract:We have developed a vegetation monitoring lidar called a laser-induced Fluorescence Spectrum (LIFS) lidar which is able to get the living status of plants by observing their Fluorescence remotely. The features of its operation are; daytime observations possible even outdoors, mobility and self-sufficiency, capability of mapping plant living information, and a user-friendly operation by unifying the controls of different equipment of the lidar using software. These features make observations by our LIFS lidar possible at any time and any place. In forest observations, we could depict three-dimensional structures of Fluorescence Spectrums. We also discuss in this work the possibility of monitoring other plant physiological information such as the concentration of chlorophyll and photosynthesis secondary metabolites in this work.
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Remote Detection of the Fluorescence Spectrum of Natural Pollens Floating in the Atmosphere Using a Laser-Induced-Fluorescence Spectrum (LIFS) Lidar
Remote Sensing, 2018Co-Authors: Yasunori Saito, Kentaro Ichihara, Kenzo Morishita, Kentaro Uchiyama, Fumitoshi Kobayashi, Takayuki TomidaAbstract:A mobile laser-induced Fluorescence Spectrum (LIFS) lidar was developed for monitoring pollens floating in the atmosphere. The Fluorescence Spectrum of pollens excited at 355 nm was measured with a Fluorescence spectrometer and the results suggested that in general they had peaks at around 460 nm and the ranges were 400–600 nm. A Fluorescence Spectrum database of 25 different pollens was made with the 355 nm excitation. Based on these results, we developed a LIFS lidar that had features in pollen species identification and daytime operation. The former was achieved by the database and the latter was possible by introducing a synchronous-delay detection to a gated CCD spectrometer in an operation time of 200 ns. Fluorescence detection of pollens floating in the atmosphere was performed using the LIFS lidar in a field where cedars grow in the spring and ragweed in the autumn. The LIFS lidar system successfully detected Fluorescence Spectrums of the pollens at a distance of approximately 20 m away. We discussed the performance of the LIFS lidar by estimating the number of cedar pollens using a lidar equation, introducing a Fluorescence cross section of cedar pollens and a sensitivity of the CCD spectrometer that was measured by ourselves.
Borchen Chang - One of the best experts on this subject based on the ideXlab platform.
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dispersed Fluorescence Spectrum of the hc35cla x vibronic transition
Chemical Physics Letters, 2001Co-Authors: Chunwei Chen, Tsungchuan Tsai, Borchen ChangAbstract:Abstract The dispersed Fluorescence Spectrum following the excitation of HC 35 Cl A – X vibronic transition between 570 and 610 nm was successfully obtained in a direct current (DC) discharge supersonic free jet expansion. The analysis of the dispersed Fluorescence Spectrum results in detailed information of the HC 35 Cl X 1 A ′ state vibrational structure. The bending and C–Cl stretching frequencies as well as anharmonicity constants were determined for the first time. In addition, since no perturbation was observed in the vibrational structure of the X 1 A ′ state up to 2788 cm −1 , a lower limit of triplet–singlet energy gap was established to be roughly 8.0 kcal/mol.
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Dispersed Fluorescence Spectrum of the HC35ClÖX̃ vibronic transition
Chemical Physics Letters, 2001Co-Authors: Chunwei Chen, Tsungchuan Tsai, Borchen ChangAbstract:Abstract The dispersed Fluorescence Spectrum following the excitation of HC 35 Cl A – X vibronic transition between 570 and 610 nm was successfully obtained in a direct current (DC) discharge supersonic free jet expansion. The analysis of the dispersed Fluorescence Spectrum results in detailed information of the HC 35 Cl X 1 A ′ state vibrational structure. The bending and C–Cl stretching frequencies as well as anharmonicity constants were determined for the first time. In addition, since no perturbation was observed in the vibrational structure of the X 1 A ′ state up to 2788 cm −1 , a lower limit of triplet–singlet energy gap was established to be roughly 8.0 kcal/mol.
Yasunori Saito - One of the best experts on this subject based on the ideXlab platform.
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Distribution Map of Plant Fluorescence Spectrum in Three-Dimensions Created by a Laser-Induced Fluorescence Spectrum (LIFS) Lidar Observations
EPJ Web of Conferences, 2020Co-Authors: S. Utsunomiya, Yasunori Saito, Y. Kumagai, Takayuki TomidaAbstract:We have developed a vegetation monitoring lidar called a laser-induced Fluorescence Spectrum (LIFS) lidar which is able to get the living status of plants by observing their Fluorescence remotely. The features of its operation are; daytime observations possible even outdoors, mobility and self-sufficiency, capability of mapping plant living information, and a user-friendly operation by unifying the controls of different equipment of the lidar using software. These features make observations by our LIFS lidar possible at any time and any place. In forest observations, we could depict three-dimensional structures of Fluorescence Spectrums. We also discuss in this work the possibility of monitoring other plant physiological information such as the concentration of chlorophyll and photosynthesis secondary metabolites in this work.
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Remote Detection of the Fluorescence Spectrum of Natural Pollens Floating in the Atmosphere Using a Laser-Induced-Fluorescence Spectrum (LIFS) Lidar
Remote Sensing, 2018Co-Authors: Yasunori Saito, Kentaro Ichihara, Kenzo Morishita, Kentaro Uchiyama, Fumitoshi Kobayashi, Takayuki TomidaAbstract:A mobile laser-induced Fluorescence Spectrum (LIFS) lidar was developed for monitoring pollens floating in the atmosphere. The Fluorescence Spectrum of pollens excited at 355 nm was measured with a Fluorescence spectrometer and the results suggested that in general they had peaks at around 460 nm and the ranges were 400–600 nm. A Fluorescence Spectrum database of 25 different pollens was made with the 355 nm excitation. Based on these results, we developed a LIFS lidar that had features in pollen species identification and daytime operation. The former was achieved by the database and the latter was possible by introducing a synchronous-delay detection to a gated CCD spectrometer in an operation time of 200 ns. Fluorescence detection of pollens floating in the atmosphere was performed using the LIFS lidar in a field where cedars grow in the spring and ragweed in the autumn. The LIFS lidar system successfully detected Fluorescence Spectrums of the pollens at a distance of approximately 20 m away. We discussed the performance of the LIFS lidar by estimating the number of cedar pollens using a lidar equation, introducing a Fluorescence cross section of cedar pollens and a sensitivity of the CCD spectrometer that was measured by ourselves.
Chunwei Chen - One of the best experts on this subject based on the ideXlab platform.
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dispersed Fluorescence Spectrum of the hc35cla x vibronic transition
Chemical Physics Letters, 2001Co-Authors: Chunwei Chen, Tsungchuan Tsai, Borchen ChangAbstract:Abstract The dispersed Fluorescence Spectrum following the excitation of HC 35 Cl A – X vibronic transition between 570 and 610 nm was successfully obtained in a direct current (DC) discharge supersonic free jet expansion. The analysis of the dispersed Fluorescence Spectrum results in detailed information of the HC 35 Cl X 1 A ′ state vibrational structure. The bending and C–Cl stretching frequencies as well as anharmonicity constants were determined for the first time. In addition, since no perturbation was observed in the vibrational structure of the X 1 A ′ state up to 2788 cm −1 , a lower limit of triplet–singlet energy gap was established to be roughly 8.0 kcal/mol.
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Dispersed Fluorescence Spectrum of the HC35ClÖX̃ vibronic transition
Chemical Physics Letters, 2001Co-Authors: Chunwei Chen, Tsungchuan Tsai, Borchen ChangAbstract:Abstract The dispersed Fluorescence Spectrum following the excitation of HC 35 Cl A – X vibronic transition between 570 and 610 nm was successfully obtained in a direct current (DC) discharge supersonic free jet expansion. The analysis of the dispersed Fluorescence Spectrum results in detailed information of the HC 35 Cl X 1 A ′ state vibrational structure. The bending and C–Cl stretching frequencies as well as anharmonicity constants were determined for the first time. In addition, since no perturbation was observed in the vibrational structure of the X 1 A ′ state up to 2788 cm −1 , a lower limit of triplet–singlet energy gap was established to be roughly 8.0 kcal/mol.
Hui Chen - One of the best experts on this subject based on the ideXlab platform.
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Discrimination of dental caries using colorimetric characteristics of Fluorescence Spectrum
Caries Research, 2015Co-Authors: Qingguang Chen, Haihua Zhu, Ying Xu, Bin Lin, Hui ChenAbstract:The feasibility of colorimetric parameters for the discrimination of the stages of dental caries based on a light-induced autoFluorescence Spectrum at a 405-nm excitation wavelength was investigated. The Fluorescence spectra of 4 groups of tooth samples (10 sound, 10 early-stage decay, 14 established decay, and 10 severe decay), which were classified by the International Caries Detection and Assessment System, were experimentally measured in vitro. The carious lesion samples had an additional Fluorescence peak at around 627 nm. The mathematical relation of the Fluorescence Spectrum and human color perception was established and computed. With increasing severity, the Fluorescence color changed from green to yellow according to the colorimetric parameters of the CIE 1931 (x, y) chromaticity coordinates and dominant wavelengths. The results from a one-way ANOVA of the dominant wavelength showed a statistically significant difference among the 4 classified groups. The colorimetric parameters of the light-induced Fluorescence Spectrum can potentially be applied to evaluate the various carious levels.
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Effect of the change in serum concentration on serum Fluorescence Spectrum
Guang pu xue yu guang pu fen xi = Guang pu, 2009Co-Authors: Lexin Wang, Hui Chen, Zhi-min Zhao, Yu-jun XinAbstract:The spectral analysis technology applied to some blood diseases diagnosis is convenient and speedy. The experimental result shows that the line type and peak value of the Fluorescence spectra of serum excited by ultraviolet radiation with different wavelength remain the same, but the Fluorescence peak value changes with the wavelength of the blazed light. The present paper studied how the serum Fluorescence Spectrum changes with the serum concentration, adopting Shimadzu Corporation (Japan) Fluorescence photometer RF5301, and provided the experiment basis for disease diagnosis by hemanalysis. The experimental result shows that the Fluorescence Spectrum of serum is different under the excitation of different monochromatic light, the relative Fluorescence intensity of serum increases with the serum concentration when excitated with 220, 230 and 310-420 nm monochromatic light, but the serum Fluorescence intensity decreases while the serum concentration increases when the excitation monochromatic light is between 240 nm and 420 nm. The experimental research found that the serum concentration quenching and absorption effect is not obvious when the experimental sample is excitated by 220, 230 and 310 to 420 nm monochromatic light, and the Fluorescence stimulation plays the main role. The serum concentration quenching and absorbing effect is obvious, so the Fluorescence intensity becomes weaker and weaker with serum concentration increasing when the sample is excitated by 240 nm to 300 nm monochromatic light. This work provides the experimental basis for the choice of serum concentration in the study of serum Fluorescence Spectrum.