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【目的】探讨瘦素和血管内皮生长因子（VEGF）在子宫内膜异位症（EMs）发病机制中的作用。【方法】应用免疫组织化学法检测瘦素和血管内皮生长因子在28例卵巢子宫内膜异位囊肿患者的异位内膜、在位子宫内膜及20例正常子宫内膜中的表达特点。【结果】①腺上皮细胞中：瘦素和VEGF在异位内膜和在位内膜中的表达均高于正常子宫内膜（P〈0．05），并且异位内膜中的表达高于在位内膜（P〈0．01）；②间质细胞中：瘦素在异位内膜中的表达高于在位内膜、正常子宫内膜（P〈0．01），VEGF在异位内膜、在位内膜及正常子宫内膜中的表达差异无统计学意义（P〉0．05）；异位内膜、在位内膜中的瘦素与VEGF均呈正相关表达（P〈0．01）。【结论】瘦素和血管内皮生长因子在卵巢子宫内膜异位症的发病机制中发挥作用，两者在异位内膜和在位内膜中的血管生成过程中密切相关。

Copyright of Chinese Journal of Pathophysiology is the property of Jinan University, School of Medicine 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.)

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Copyright of Food Research & Development is the property of Food Research & Development 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.)

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Copyright of Journal of New Medicine is the property of Sun Yat Sen University 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.)

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Copyright of Journal of Practical Medicine / Shiyong Yixue Zazhi is the property of Journal of Practical Medicine 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 Journal of Practical Medicine / Shiyong Yixue Zazhi is the property of Journal of Practical Medicine 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.)

[Objective/Meaning] In the process of rural revitalization, the increasing demand for the e-commerce logistics has put forward new requirements for the rural e-commerce logistics service capabilities. Exploring the index composition of rural ecommerce logistics service capability and conducting the reasonable analysis and scientific evaluation of them was helpful to provide decision-making reference for improving the level of rural e-commerce logistics service and promoting the high-quality development of rural e-commerce logistics. [Methods/Procedures] Based on the situation of Fujian Province, an index system of the rural e-commerce logistics service capability was constructed, which included 7 first-level indicators and 28 second-level indicators such as the logistics infrastructure. Then, through the investigation of 10 villages in 4 towns such as Gaoshan Town in Fuqing City, 218 sample data were obtained. On this basis, the analytic hierarchy process (AHP) and fuzzy comprehensive evaluation method (FCE) were used to analyze and evaluate the logistics service capacity of rural e-commerce in Fujian. [Results/Conclusions] The study found that the logistics service capability of rural e-commerce in Fujian was generally at an above medium level, and the comprehensive evaluation scores of the three indicators, including the logistics distribution capability, the information service capability and the value-added service capability, were lower than the overall score, which needed to be improved. Accordingly, some strategies and suggestions were put forward including constructing the logistics system and optimizing the distribution process, using the advanced technology and realizing the information sharing, broadening the service scope and enhancing the consumption experience. [ABSTRACT FROM AUTHOR]

Objective To investigate the differential metabolites of lymph node metastasis in pancreatic ductal carcinoma (PDAC) and provide new ideas for the pathogenesis, early diagnosis and treatment of metastatic pancreatic cancer. Methods Forty serum specimens of patients with pancreatic ductal carcinoma were collected and divided into lymph node metastasis group (18 cases) and non-metastasis group (22 cases). Thirty-one serum specimens were also collected from the healthy control group. Liquid chromatographytandem mass spectrometry was used to analyze the differential metabolites and metabolic pathways between patients with PDAC and healthy controls as well as between lymph node metastasis and non-metastasis groups. Results Principal component analysis and partial least squares-discriminant analysis revealed statistically significant differences in metabolites and metabolic pathways between patients with PDAC and the healthy controls and between lymph node metastasis and non-metastasis groups. The differences in profiles were also statistically significant. Seventy-six different metabolites and 11 metabolic pathways were screened between patients with PDAC and the healthy controls, among which phenylalanine metabolism and histidine metabolism were the two most influential metabolic pathways. Four different metabolites were screened between lymph node metastasis and non-metastasis groups, and the expression of ethopropazine and phenylalanine were upregulated but the expression of tetrahydrodeoxycorticosterone and oxprenolol were downregulated. Conclusion Metabolites are significantly altered in the lymph node metastasis group of patients with PDAC compared with the non-metastasis group. Ethopropazine, phenylalanine, tetrahydrodeoxy corticosterone, and oxprenolol are potential biomarkers of lymph node metastasis in patients with PDAC. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of 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.)

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Copyright of Journal of New Medicine is the property of Sun Yat Sen University 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.)

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Copyright of Food Research & Development is the property of Food Research & Development 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.)

Aiming at the problem of low reliability of real-time ambiguity fixation in kinematic-to-kinematic relative positioning based on single-frequency carrier phase, a DGNSS / INS-based smoothed INS-aided ambiguity resolution strategy for kinematic-to-kinematic relative positioning was proposed, to improve the universality of high precision positioning for low cost receivers. Firstly, a kinematic-to-kinematic relative positioning model was established based on double-difference (DD) pseudorange and carrier phase observations. Secondly, a Kalman filtering was applied to the inertial navigation data, and the DD observation equations were reconstructed using the prediction pseudorange by filtered INS-derived position. Meanwhile, the INS-derived position constraint equation was complemented. The high precision ambiguity float solutions and their covariance matrix were obtained, then LAMBDA algorithm was used to fix the ambiguity and ratio test was conducted. Finally, the INS errors were feedback corrected by DGNSS / INS tightly coupled Kalman filtering results to maintain INS high precision navigation. The experimental results of testing data show that the method adopted can effectively increase the accuracy of ambiguity float solution, reduce the search space for ambiguity, and improve the success rate of ambiguity fixation. By comparing the results of without INS aided, with INS aided and with smoothed INS-aided, the success rate of the three methods were 92. 3%, 99. 1% and 99. 6%, respectively, and finally achieve dynamic relative positioning in centimeters. [ABSTRACT FROM AUTHOR]

Boron nitride nanosheets (BNNSs) is an insulating material with high breakdown strength (800 kV/mm), which is an ideal candidate for the enhancement of breakdown strength of polymer-based composites. Generally, the lateral size of BNNSs has a significant influence on thermal conductivity and mechanical properties of composites. Thus, it is worthy to further study the size effect of BNNSs on dielectric properties of composites. In this study, edge-hydroxylated BNNSs with large lateral size (l-BNNSs) and small lateral size (s-BNNSs) were respectively added into poly(vinylidene fluoridehexafluoropropylene) (P(VDF-HFP)) to prepare BNNSs/P(VDF-HFP) composite films. The breakdown strength and dielectric constant of the composite films are tested by dielectric strength tester and broadband dielectric spectrometer to reveal the size effect of BNNSs on dielectric properties of polymer-based film capacitors. Due to the better crystal lattice of l-BNNSs and higher degree of in-plane orientation compared with s-BNNSs, the insulating network of l-BNNSs/P(VDF-HFP) composite film is more compact and perfect, which can effectively prevent the occurrence of conduction and electrical breakdown in composite films. When the mass fraction of BNNSs is 10%, P(VDF-HFP)/l-BNNSs composite films reach the highest breakdown strength (644 kV/mm). Compared with s-BNNSs/P(VDF-HFP) composite films, the breakdown strength of l-BNNSs/P(VDF-HFP) composite films has an increase of 7.65%. [ABSTRACT FROM AUTHOR]

Copyright of Science Technology & Industry is the property of Chinese Society of Technology Economics 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.)