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Copyright of Food Science & Technology & Economy is the property of Grain Science & Technology & Economy 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Signal Processing is the property of Journal of Signal Processing 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 Southeast University / Dongnan Daxue Xuebao is the property of Journal of Southeast University 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.)

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Copyright of Journal of Hydrobiology is the property of Editorial Department of Journal of Hydrobiology 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 China Medical Education Technology is the property of China Medical Education Technology 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 South China Normal University (Natural Science Edition) / Huanan Shifan Daxue Xuebao (Ziran Kexue Ban) is the property of Journal of South China Normal University (Natural Science Edition) 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 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.)

Copyright of Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Vibration, Measurement & Diagnosis is the property of Nanjing Hangkong Daxue 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.)

目的　探讨小儿活动拉钩辅助单孔腹腔镜治疗鞘膜积液的临床疗效。方法　选取150例鞘膜积液患儿， 采用随机分组方法将其分为观察组和对照组各75例，观察组采用小儿活动拉钩辅助单孔腹腔镜治疗，对照组采用 硬膜外穿刺针常规腹腔镜治疗，由同一医师采取以上两种不同手术方式治疗；对比两组手术时间、术后皮下穿刺孔 并发症、术后复发等情况。结果　观察组术前诊断均为单侧，术中发现32例为双侧鞘状突未闭，予以同期处理。对 照组术前诊断均为单侧，术中发现30例为双侧鞘状突未闭，予以同期处理。患儿均顺利完成手术。观察组、对照组 双侧手术时间分别为（18. 91 ± 1. 94）、（19. 63 ± 2. 46）min，两组双侧手术时间比较差异无统计学意义（P>0. 05）；观 察组、对照组单侧手术时间分别为（10. 19 ± 1. 16）、（12. 09 ± 2. 13）min，两组单侧手术时间比较差异有统计学意义 （P<0. 05）。观察组无术后皮下穿刺孔并发症，对照组术后发生皮下穿刺孔并发症7例，两组比较差异有统计学意义 （P<0. 05）。观察组随访期间无复发，对照组2例复发，两组比较差异无统计学意义（P>0. 05）。结论　单孔腹腔镜 下使用小儿活动拉钩治疗鞘膜积液可达到常规腹腔镜治疗效果，且创伤小、术后无皮下穿刺孔并发症发生。 [ABSTRACT FROM AUTHOR]

Copyright of Journal of Clinical Hepatology / Linchuang Gandanbing Zazhi is the property of Journal of Clinical Hepatology 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 South China University of Technology (Natural Science Edition) is the property of South China 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.)

BACKGROUND: Previous studies showed that immunomodulatory peptide DP7 has good antibacterial activity and immunomodulatory activity in vitro. OBJECTIVE: To investigate the therapeutic effect of a new type of immunoregulatory peptide DP7 temperature-sensitive gel on periodontitis in rats. METHODS: The periodontitis model of right maxillary first molar was established in 8-week-old SD rats, and the 48 successfully modeled rats were divided into 6 groups. Except for the natural healing group without treatment, minocycline hydrochloride was injected into periodontal pocket of positive control group. The periodontal pocket of the rest of the four groups were injected with regulatory peptide DP7 concentration 0%（blank gel）, 0.1%, 0.3%, 1% temperature sensitive gel, once a week for 4 weeks. Four weeks later, the periodontal probing depth and the distance between cementum enamel boundary and alveolar crest were examined; and histological and immunohistochemical staining of the right maxilla was performed. RESULTS AND CONCLUSION: (1) The probing depth and the distance between cementum enamel boundary and alveolar crest in 1% and 0.3% DP7 gel treatment groups were lower than those in positive control group (P < 0.05). (2) Hematoxylin-eosin staining showed that the gingival tissue of 0.1%, 0.3%, 1% DP7 gel groups and positive control group was more complete, and the epithelial pedicle process returned to normal, with the orderly array of fibroblasts and new capillaries, and no obvious osteoclasts were observed. The blank gel treatment group and the natural healing group showed the pathological manifestations of periodontitis. (3) Masson staining showed that a large number of new fibroblasts were orderly arranged in the 0.1%, 0.3%, and 1% DP7 gel groups and the positive control group, and bulging collagen hyperplasia and new capillaries were visible. Osteoid or new bone formation was even observed in the 1% and 0.3% DP7 gel groups. However, the blank gel group and the natural healing group had no obvious collagen fiber proliferation and osteoid formation. (4) Immunohistochemical staining showed that the expression levels of tumor necrosis factor-α and interleukin-1β in 0.3% and 1% DP7 gel groups were not significantly different from those in the positive control group (P > 0.05). The expression levels of interleukin-10, bone morphogenetic protein-2 and osteoblast specific transcription factor 2 in 0.3% and 1% DP7 gel groups were higher than those in the positive control group (P=0.000). The expression levels of interleukin-10, bone morphogenetic protein-2 and osteoblast specific transcription factor 2 in 0.3% DP7 gel group were higher than those in the 1% DP7 gel group (P < 0.05). (5) The results showed that 0.3% and 1% immunoregulatory peptide DP7 gel had favorable therapeutic effect on periodontitis, and 0.3% immunoregulatory peptide DP7 gel had the best therapeutic effect. [ABSTRACT FROM AUTHOR]

Copyright of Issues of Forestry Economics is the property of Issues of Forestry Economics 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 Food Safety & Quality is the property of Journal of Food Safety & Quality 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 New Architecture is the property of New 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.)

Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center 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 Feed Research is the property of Editorial Board of Feed Research 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 Natural Gas & Oil is the property of Editorial Department of Natural Gas & Oil 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 Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis 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 Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental 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 China Sciencepaper is the property of China Sciencepaper 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.)

Background——The previous studies mainly employed predictive research and qualitative research methods to analyze the impact of the expiration of the subsidy for farmland conversion on farmers’ income, and it remains unclear what impact the expiration of the subsidy for farmland conversion will have on farmers’ income. Methods——Based on the survey data of 831 farmland conversion farmers from 8 formerly poverty-stricken counties (districts) in Sichuan and Hebei Province in 2019,the PSM-DID model was used to estimate the net impact of farmland conversion subsidy expiration on the income and structure of farmland conversion farmers and conduct heterogeneity analysis. Meanwhile, the mediation effect model was used to analyze the impact mechanism. Results——The regression coefficient of the expiration of the subsidy for farmland conversion on farmers’ production and operating income was-0.899,indicating that it reduced farmers’ production and operating income in a certain extent. The regression coefficients of the wage income and transfer income of households were 0.808 and 0.734,indicating that the wage income and transfer income of households were increased in a certain extent. The regression coefficient of total income of farmers is 0.516,and is significantly positive at 1% level, indicating that the expiration of the subsidy for farmland conversion can optimize the income structure of farmers and improve the income level of farmers on the whole. Heterogeneity analysis shows that the impact of the expiration of the subsidy for farmland conversion on the income of different farmers is different, and the impact coefficient of the total income of farmers in the low, middle and high income groups is-0.103,0.652 and 0.127,respectively, indicating that the total income of farmers in the low income group will decrease. The estimated effect coefficients of the total income of households in the low, medium and high cropland area groups were 0.597,0.541 and 0.488,respectively, respectively, indicating that the promotion effect of the total income of households in the high cropland area group was weaker than that in the low cropland area group. The results of the mediation model show that agricultural labor time, off-farm labor time and off-farm labor rate significantly restrain the negative impact of the expiration of the subsidy for farmland conversion on the total income of farmers, and off-farm employment and labor time have a mediation effect on the relationship between the expiration of the subsidy for farmland conversion and the total income of farmers. Conclusions and Discussions——Although the expiry of the subsidy for returning farmland will reduce the total income of low-income farmers, although it is not conducive to the growth of farmers’ production and business income, it is conducive to the growth of farmers’ wage income and transfer income. Therefore, the following recommendations are made: First, efforts should be made to expand labor export channels in poor areas, perfect local labor service system, improve farmers’ non-agricultural employment ability, strengthen non-agricultural skill training, increase non-agricultural employment opportunities, so as to ensure the income level of farmers whose subsidies expire. Second, it is necessary to take into account the economic status quo of poverty-stricken areas, follow the principle of efficiency and equity, take full account of the differences of returned farmers, guide different farmers to establish diversified livelihood transformation strategies, and take multiple measures to narrow the income gap among farmers. Third, the government should understand the current situation and policy appeal of the returned farmers, promptly introduce and improve follow-up policies for forest rehabilitation from slope agriculture. [ABSTRACT FROM AUTHOR]

[Objective] The present study aimed to clarify the growth, material accumulation and distribution, and nutrient utilization efficiency of flue-cured tobacco in tobacco-rice rotation fields for Hunan. [ Method] The dynamic changes of root system, above ground agronomic characters, dry matter, nitrogen, phosphorus, potassium and nicotine accumulation and distribution, as well as the utilization efficiency of nitrogen, phosphorus and potassium in three types of tobacco-rice rotation fields were studied by using typical case investigation method. [Result] Tobacco plants in high yield fields had developed root system, large quantity, large absorption surface area, thick stem, large leaf area, and more accumulation of dry matter, nitrogen, phosphorus and potassium. 90 days after transplanting, the total dry matter, nitrogen, phosphorus, potassium and nicotine accumulation in high yield fields were 35. 08%, 33. 84%, 18. 18%, 28. 03% and 25. 24% higher than those in suitable yield fields, and 70. 4 1 %, 44. 51 %, 63. 53 %, 59. 94 % and 21. 81 % higher than those in safeguarding yield field, respectively. The harvest index of nitrogen, phosphorus and potassium were higher in suitable yield fields. [Conclusion ] The suitable soil types should be selected for tobacco production. Straw should be full returned to the field to improve soil organic matter. Early winter ploughing should be carried out to promote soil ripening. Attention should be paid to the cultivation of soil to improve soil aeration and soil temperature, so as to promote early growth and rapid development of flue-cured tobacco. [ABSTRACT FROM AUTHOR]

Copyright of Plastics Science & Technology / Suliao Ke-Ji is the property of Plastics Science & Technology 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.)

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Copyright of Journal of Xinyang Normal University Natural Science Edition is the property of Journal of Xinyang Normal University 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 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.)

Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials 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 Control Theory & Applications / Kongzhi Lilun Yu Yinyong is the property of Editorial Department of Control Theory & Applications 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.)