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目的开发一种辅助发育性髋关节发育不良（DDH）的早期超声筛查的深度学习系统，即新型智能髋关节超声技术（S-hip），并验证其临床应用价值。方法选取我院自 2021年11月至 2022年8月通过标注和审核的婴儿髋关节冠状切面超声图像11 100张，其中8 100张图像用于训练集，3 000张用于测试集，用于构建S-hip深度学习系统。另采集87例婴儿双侧髋关节共174张标准冠状切面超声图像用于验证S-hip的自动测量与医生人工测量之间的一致性。S-hip、超声专家和住院医师分别测量α角、β角和FHC，分别记录测量数据和测量耗时，并进行统计学分析。另选取100张髋关节标准冠状切面超声图像，用于超声专家和超声住院医师测量者自身两次测量重复性验证。结果S-hip与超声专家测量α角、β角和FHC结果的组内相关系数（ICC）与95%可信区间（CI）分别是0.799（0.738，0.847）、0.798（0.737，0.846）和0.934（0.954，0.975）。超声住院医师和超声专家测量α角、β角和FHC结果的ICC（95%CI）值分别是0.725（0.645，0.789）、0.674（0.583，0.748）和0.931（0.908，0.949）。S-hip与超声专家测量α角、β角和FHC结果的平均绝对误差（MAE）分别是2.69 °、4.43 °和2.47%。S-hip组、超声专家组和超声住院医师组测量耗时分别（1.59±0.36） s、（18.76±2.23） s和（19.45±2.76） s，S-hip自动测量耗时明显短于人工测量，差异有统计学意义（P

【目的】探讨钝顶螺旋藻多糖(PSP)抗单纯疱疹病毒2型(HSV-2)的作用及可能机制,为进一步开发该药提供理论依据。【方法】实验选用HSV-2标准株(333株),以不同剂量的PSP作用于HSV-2复制周期的不同阶段,终点以病毒半数感染量(TCID50)、细胞病变效应(CPE)、MTT染色细胞保护率(MTT法)及荧光定量PCR(FQ-PCR)作为评价手段,判断PSP的抗病毒效果。【结果】PSP对Vero细胞毒性极低(TC50为1750μg/mL),对HSV-2无直接灭活作用,可抑制病毒吸附和感染细胞内病毒的复制,其中50μg/mL、100μg/mL、200μg/mL浓度的PSP对病毒复制的抑制率分别为63.94%、81.41%、85.63%;FQ-PCR结果显示随着PSP浓度及作用时间的增加,PSP对HSV-2DNA的抑制作用明显增强,具有良好的剂量和时效关系。【结论】PSP在体外具显著的抗HSV-2病毒作用,此作用发生在病毒吸附、病毒基因复制等多个环节上。

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Copyright of Journal of Shanghai Jiaotong University (Medical Science) is the property of Journal of Shanghai Jiaotong University (Medical Science) 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 Mine Automation is the property of Industry & Mine Automation 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.)

An “off-on” fluorescence probe (4a) based on N，N- (dimethylamino) naphthalenyl flavone (3) is designed and synthesized for detection of butyrylcholinesterase (BChE) by using resorcinol as starting materials. The structure of the probe is identified by nuclear magnetic resonance spectroscopy (NMR) and high resolution mass spectrometry (HRMS) . The results show that probe 4a could react rapidly and specifically with BChE， and its fluorescence intensity increases obviously at 574 nm in PBS of pH 8. 0. Meanwhile， the color change of the solution can be seen by naked eyes. The response mechanism is explored through high performance liquid chromatography (HPLC) and HRMS. The results reveal that BChE catalyzes the cleavage of the ester bond， and strongly fluorescent flavone 3 is released. In addition， probe 4a could be used for fluorescence imaging of BChE in living human hepatocellular carcinoma (HepG2) cells. [ABSTRACT FROM AUTHOR]

Copyright of Petroleum Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency 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 Journal of Mine Automation is the property of Industry & Mine Automation 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.)