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Copyright of Chinese Journal of Cancer Biotherapy is the property of Editorial Office of Chinese Journal of Cancer Biotherapy 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.)

Urban-rural factors have been the most important elements to promote urban-rural linkage and regional cooperation in an urban-rural community of destiny. Various social resources are very necessary for social production and business activities in urban and rural areas. Rural development has been hindered and slowed by the dual system of urban and rural areas in China over a long time. However, only a single flow has been considered in the urban-rural factors. The current relationship between urban and rural areas has shifted from separation to integration. The flow of urban and rural factors has been characterized by the "multi-factors two-way freedom flow", particularly with the national policies leaning toward rural development, and the implementation of national strategies, such as "new urbanization", "rural revitalization", and " integrated urban-rural development ". Furthermore, agricultural production has gradually brought into the various promises of ecological conservation, leisure experience, and cultural inheritance. Rural development has entered an accelerated transformation period. The rural pluralistic values can be expected to realize for the rural revitalization strategy and transformation. It is very necessary to clarify the influencing mechanism of urban-rural factor flow for the rural multi-values in the urban-rural integrated development and all-round rural revitalization. Taking Chongqing in South China as the research area, this study aims to evaluate the flow of urban and rural factors, as well as the realization of rural multi-values. A systematic analysis was implemented on the correlation between rural and urban factor flow and rural multi-values, in order to explore the influence mechanism of rural factor flow, and then to empower the rural multi-values realization and the path of realizing rural multi-values under the flow of urban and rural elements. The results showed that: 1) The correlation logic law was established between rural-urban factor flows and the realization of rural multi-values. The comprehensive effects of population mobility, resource transfer, and social interaction between urban and rural systems were utilized to realize the multiple values in rural areas. Among them, the core, key and driving forces were the population flow, the resource transfer, and the social interaction, respectively. 2) There was a significant spatial difference in the factor flows between urban and rural areas. The population flow was relatively frequent with a spatial pattern of "high in the west and low in the east". There was a small difference in resource transfer, the high integration degree of urban and rural areas, the more interaction between urban and rural systems, and the highly active degree of resource transfer. There was a large difference between urban and rural development in southeast Chongqing and northeast Chongqing. There was a low integration degree of urban and rural, and the low active degree of resource transfer. Social interaction was less with the low activity, indicating a spatial pattern of "low-value series and high-value flower arrangement". 3) Rural multi-values were represented by supply, regulation, inheritance, and service values. The realization degree of rural multi-values was normally distributed with a spatial pattern of "high in the south and low in the north, and flower arrangement in the north". The distribution of flower arrangement in the main metropolitan area was mainly in the middle and low-value areas, while the northeast and southeast of Chongqing were in the middle and high-value areas. Low-value area was less. 4) The rural multi-values were attributed to the comprehensive effects of multiple factors, such as population flow, resource transfer, and social interaction. Population flow shared a significant positive correlation with the supply and adjustment value with a positive promotion, whereas a significant negative correlation was found with the inheritance value with a reverse inhibition effect. Resource transfer presented a significant positive correlation with the supply, adjustment, and service value, indicating a positive promoting effect. Social interaction showed a significant positive correlation to the adjustment and service value with a positive promotion effect, whereas, a significant negative correlation was found in the inheritance value with a reverse inhibition effect. 5) Rural multi-values should be started from three aspects: a new urban-rural relationship with the county territory as an important carrier, in order to establish an institutional channel for the free flow of factors with the full factor flow as the core. The rural value can be expected to realize with the high quality and multi-values in modern agriculture. [ABSTRACT FROM AUTHOR]

BACKGROUND: Small-diameter blood vessel prosthesis has a wide application value in the treatment of peripheral vascular diseases, but the problem of graft failure due to early thrombosis needs to be solved. OBJECTIVE: To summarize research progress on early thrombosis and prevention of small-diameter blood vessel prosthesis. METHODS: The relevant literature published on CNKI, Wanfang, PubMed, and Google Scholar databases from 2000 to 2020 was retrieved by the first author. The Chinese search terms were “small-diameter blood vessel prosthesis, small-diameter tubular stents, tissue-engineered blood vessels, antithrombotic, thrombosis, hemocompatibility, hydrophilicity, endothelialization”. The English search terms were “small-caliber vascular graft, vascular tissue engineering applications, endothelialization, hemocompatibility, surface modification”. The relevant literature on the pathophysiological mechanism and prevention of small-diameter blood vessel prosthesis thrombosis in China and abroad was retrieved, and the surface modification and endothelialization of biological materials were taken as the inclusion criteria. Finally, 57 articles were selected for review. RESULTS AND CONCLUSION: Prevention of thrombosis is a hotspot and a difficulty in the study of small-diameter blood vessel prosthesis. The research progress at home and abroad in recent years shows that the early thrombosis of small-diameter blood vessel prosthesis is related to plasma protein adsorption and contact activation of coagulation factors. By improving the surface hydrophilicity, releasing antithrombotic substances, planting seed cells and target gene induction, the thrombosis of small-diameter blood vessel prosthesis has been improved to a certain extent, but it is still in the experimental stage, and there is still a certain distance from clinical application. Therefore, it is necessary to further explore or optimize a more suitable vascular material to provide more choices for clinical application. [ABSTRACT FROM AUTHOR]

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency 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.)

Objectives The study aims to facilitate China’s hydrogen energy industry and improve the quality of hydrogen, as well as solving the technical problem of argon impurity quantification due to the difficulty of effective separation of oxygen and argon in hydrogen quality analysis method. Methods An analytical method for accurate determination of trace argon impurity in hydrogen based on chromatographic correction factor is established. Firstly, the helium ionization gas chromatographic method is established through the self-prepared reference materials of argon in hydrogen and oxygen in hydrogen, along with the correction factors of oxygen and argon on the helium ionization gas chromatograph are researched; Secondly, the response relationship between oxygen and argon is calculated, while the long-term stability of which is investigated; Thirdly, by using the micro oxygen analyzer, the oxygen impurity content in hydrogen is measured. Results The argon impurity content in hydrogen is accurately determined according to the response relationship between oxygen and argon. Conclusions A new method combined helium ionization gas chromatography with electrochemical method is first proposed for the determination of trace argon impurity in hydrogen. It provides the guarantee on the accuracy data of argon content in hydrogen with the advantages of simplicity, strong operability and wide determination range, making up for the deficiency of argon impurity analysis method. Furthermore, the application of this method has great potential on the evaluation of the hydrogen quality. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage 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 Preventive Veterinary Medicine / Zhongguo Yufang Shouyi Xuebao is the property of Chinese Journal of Preventive Veterinary 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 Chinese Journal of Contemporary Pediatrics is the property of Xiangya Medical Periodical Press 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 Chinese Journal of Contemporary Pediatrics is the property of Xiangya Medical Periodical Press 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 Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong is the property of PetroChina Southwest Oil & Gas Field Company 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 Chinese Journal of Contemporary Pediatrics is the property of Xiangya Medical Periodical Press 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.)