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目的: 探讨三七总皂甙对提高切断视神经后节细胞存活的作用。方法: 用荧光素逆行示踪标记法和定量解剖学 技术观察正常和经三七总皂甙处理的动物于切断视神经 5、7、14 d 后视网膜节细胞的密度。结果:①正常视网膜节细胞平均 密度为( 2 007±115) /mm2 ; ②切断视神经 5、7、14 d后其视网膜节细胞平均密度分别下降至: ( 1 198±107) /mm2,( 825±40) / mm2 和( 196±10) /mm2 ; ③给予生理盐水的对照组在上述各时间组视网膜节细胞平均密度与单纯切断视神经组结果相似; ④ 给予三七总皂甙的实验组在 5、7、14 d 视网膜节细胞的平均密度分别为( 1 461±96) /mm2 ; ( 1064±91) /mm2)和( 302±19) / mm2 ,与切断视神经组和生理盐水对照组相比在各时间组上均存在显著性差异(P

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department 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 Shipin Kexue/ Food Science is the property of Food Science Editorial Department 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 Chinese Journal of Applied Chemistry is the property of Chinese Journal of Applied Chemistry 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 Shipin Kexue/ Food Science is the property of Food Science Editorial Department 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 Shipin Kexue/ Food Science is the property of Food Science Editorial Department 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 Shipin Kexue/ Food Science is the property of Food Science Editorial Department 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 South Architecture / Nanfang Jianzhu is the property of South Architecture 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.)

The Pearl River Estuary is the core water area of the Greater Bay area of Guangdong, Hong Kong, and Macao. The river net of the Pearl River Delta is dense and staggered, and its sediment transport process is complex due to the influence of runoff and tides. While sediment transport is a key process in river evolution, it is directly related to the flood control water supply and shipping safety of the Greater Bay area. To investigate the extent of the effect of sediment transport on the Greater Bay area, we analyzed the inversion of water surface sediment under tidal action using in-situ data, high-frequency GF-4 satellite image data (including multi temporal images), water quality, and reflection spectrum data from December 28, 2019 and June 20, 2020. The Mean Absolute Percentage Error (MAPE) value for atmospheric correction was 18.85%. We built several sediment inversion models based on the near-infrared, red, and blue band ratio of the GF-4 satellite image data. The best suited models for the flood and dry seasons had MAPE errors of 30% and 23.54%, respectively. We further obtained the continuous dynamic monitoring results and the daily change of sediment transport in the Pearl River Estuary at an interval of 2 h. The high frequency remote sensing inversion results gave a clear picture of the overall sediment transport dynamics of the estuary. Compared with the in-situ sediment concentration, the inversion results were consistent with the variation of sediment concentration in the tidal cycle. Moreover, we analyzed the dynamic characteristics of sediment transport under the influence of runoff tide. We found that with the rising tide, the overall suspended sediment concentration in Lingding Bay decreased considerably, Lingding Bay is a trumpet shaped estuary located outside the Pearl River Estuary. The north area of Neilingding Island is affected by human activities, thus the riverbed is degraded owing to reduced sediment input and reduced sediment resuspension to the surface. This creates a large water area of low suspended sediment content under the rising tide. Under the ebb tide, water with high suspended sediment content diffuses into the Macau Coastal Waters along the west bank of Lingding Bay. However, the southeast sediment diffusion is restricted by the backwaters from the Humen ebb current. Our method provides a new approach for large-scale operational monitoring of sediment transport in complex estuaries; furthermore, it provides a new strategy of cross-validation between the numerical simulation and remote sensing monitoring of sediment transport. [ABSTRACT FROM AUTHOR]