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[Objectives] Soil background interferences with unmanned aerial vehicle (UAV) remote sensing monitoring. This paper aimed to investigate soil removal background for UAV hyperspectral monitoring of tobacco growth and quality. [Methods] In this study, a flue-cured tobacco field experiment involving two varieties and four nitrogen application levels was conducted. A hyperspectral camera mounted on the UAV platform was used to obtain the canopy reflection spectrum data of flue-cured tobacco during key growth periods. The average spectrum of each plot after soil effect removal was removed by spectral separation of soil and vegetation (3SV) algorithm or vegetation index threshold method, respectively. The vegetation index optimization algorithm was used to construct the hyperspectral monitoring model of leaf area index and nicotine content of flue-cured tobacco during the whole growth period. [Results] After using the 3SV algorithm, the high correlation between band combinations and tobacco nicotine was distributed in combination with λ1:450-500 nm and λ2:580-660 nm, λ1:630-670 nm and λ2:680-700 nm. The high correlation between band combinations and leaf area index was found in combination with λ1:730-770 nm and λ2:750-800 nm, λ1:510-600 nm and λ2:680-700 nm. Compared to the vegetation index threshold algorithm, the 3SV algorithm significantly improved the monitoring model's validation accuracy for both tobacco nicotine content and leaf area index. The model validation determination coefficient R² of ‘Yunyan 87' nicotine increased from 0.64 to 0.88, and the RMSE decreased from 0.71% to 0.29%, which showed the most significant effect. Using 3SV algorithm and band optimization algorithm, the index with the best relationship of leaf area index in ‘Yunyan 87' and ‘K326' was NDLI515, 691 and NDLI764,799, respectively, the index with the best relationship of nicotine content of ‘Yunyan 87' and ‘K326' was NDNI450,658 and NDNI456,654, respectively. A general leaf area index and nicotine equation were established for monitoring the whole field growth period of the UAV platform. [Conclusions] By comparing different soil background removal algorithms, it was found that the 3SV algorithm improved the accuracy of tobacco leaf area index and nicotine monitoring model, and provided technical support for UAV hyperspectral large-area monitoring of tobacco growth and quality. [ABSTRACT FROM AUTHOR]

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Iontophoresis is a non-invasive physical permeation technology, which has been widely applied in transdermal and transmucosal administration. Compared with other permeation technologies, iontophoresis have the advantages of high efficacy, high patient compliance and controllable delivery dose. With the development of microneedles and nano-carrier technology, the combination of iontophoresis and other penetration promotion technologies has gradually become a research hotspot. The penetration mechanism and influencing factors of iontophoresis, and the study on the combination of iontophoresis with hydrogel, microneedles or nano-carrier were reviewed in this paper. [ABSTRACT FROM AUTHOR]

Copyright of Special Oil & Gas Reservoirs is the property of Special Oil & Gas Reservoirs Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Water Conservancy & Electric Power Technology & Application is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Northwest A & F University - Natural Science Edition is the property of Editorial Department of Journal of Northwest A&F University (Natural Science Edition) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mechanical & Electronic Control Engineering is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To investigate the regulation effect of phosphorylated mammalian target of rapamycin (p-mTOR)/p70 ribosomal protein S6 kinase (p70S6K) signaling pathway in the inflammatory response of acute necrotizing pancreatitis (ANP). Methods Ninety-six male SPF rats were randomly divided into the ANP model group, rapamycin group, and blank control group. The rats in the ANP model group were injected with 1 miykg of 5 % sodium tauroeholate in the opposite direction of pancreatic duct. The rats in the rapamycin group were injected with 0.5 mg/kg rapamycin intra-peritoneally on the basis of the model group. Serum samples were collected from 8 rats in each group at 3, 6, 12, and 24 h after the model was established, and the levels of AMY, TNF-a, IL-6, and IL-10 in the serum were measured. Pancreatic tissues were taken for the detection of p-mTOR and p70S6K protein expression by Western blotting, for histopathological observation by HE staining, and apoptotic index by TUNEL. Results At each time point, the serum levels of AMY, TNF-a, and IL-6 in the rapamycin group were significantly lower than those in the ANP group (all P < 0. 01) , but IL-10 was significantly higher than that of the ANP group (P < 0. 01). All the parameters in the ANP model group and rapamycin group were higher than those of the blank control group (all P < 0. 05). The expression of p-mTOR and p70S6K in the rapamycin group was significantly lower than that in the ANP model group (both P <0. 01). The apoptosis index of the rapamycin group was also significantly lower than that of model group (P <0.01). Histopathological examination showed that the degree of lesions in the pancreatic tissues of the rapamycin group was lighter than that in the model group. Conclusion Decreased activity of p-mTOR/p70S6K pathway can improve inflammation and reduce pancreatic tissue lesions in ANP rats. [ABSTRACT FROM AUTHOR]

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)