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为了筛选出适合辣椒鸡油的天然抗氧化剂，以延长其保质期，研究并比较了6种天然抗氧化剂（迷迭香提取物、维生素E、茶多酚、维生素C、槲皮素和硫辛酸）对辣椒鸡油酸值、过氧化值、DPPH自由基清除能力和总还原能力的影响。结果表明：6种天然抗氧化剂在辣椒鸡油中均具有一定的抗氧化能力；在抑制酸值方面，槲皮素效果最佳，维生素C最差;在抑制过氧化值方面，槲皮素效果最佳，维生素E最差；在DPPH自由基清除能力方面，迷迭香提取物效果最佳，硫辛酸最差；在总还原能力方面，槲皮素效果最佳，维生素E最差；槲皮素、迷迭香提取物和茶多酚在酸值、过氧化值、DPPH自由基清除能力和总还原能力方面均位于前三。综合考虑抗氧化效果、抗氧化剂稳定性、成本等因素，可优先选择迷迭香提取物和茶多酚作为辣椒鸡油的抗氧化剂以提高其储藏性能。In order to screen natural antioxidants suitable for chili chicken oil and extend its shelf life, the effects of six natural antioxidants (rosemary extract, vitamin E, tea polyphenols, vitamin C, quercetin and lipoic acid) on the acid value, peroxide value, DPPH radical scavenging capacity, and total reducing capacity of chili chicken oil were investigated and compared. The results showed that six natural antioxidants had certain antioxidant capacity in chili chicken oil; in inhibiting acid value, quercetin was the most effective and vitamin C was the worst; in inhibiting peroxide value, quercetin was the best and vitamin E was the worst; in terms of DPPH radical scavenging capacity, rosemary extract was the most effective and lipoic acid was the worst; in terms of total reducing capacity, quercetin was the most effective and vitamin E was the worst. Quercetin, rosemary extract and tea polyphenols were in the top three in terms of acid value, peroxide value, DPPH radical scavenging capacity and total reducing capacity. Considering the antioxidant effect, antioxidant stability and cost, rosemary extract and tea polyphenols can be preferred as antioxidants for chili chicken oil to improve its storage performance.

Copyright of West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology 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 Zhejiang University (Science Edition) is the property of Journal of Zhejiang University (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 Harbin University of Science & Technology is the property of Journal of Harbin University of 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.)

This study analyzes in detail the effectiveness and existing problems of the current policy implementation of the main functional zone in the "multi planning and integration" national land spatial planning system, and proposes an overall idea of systematizing, differentiating, coordinating, and incentivizing the policy system of the main functional zone in the new era of national land spatial governance. From the perspectives of strengthening the top-level design of policy systems, classifying and improving policy tools for the main functional zone, strengthening comprehensive policy coordination, and improving policy implementation evaluation mechanisms, the policy recommendations are proposed for improving and implementing the strategic system of the main functional areas. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Advanced Technology & Management is the property of National Central University, Research Center for Advanced 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 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.)

Explosion-hydraulic composite fracturing is a new method for deep shale oil and gas exploitation, that is, the hydraulic fracture is rapidly expanded in the broken rock formed around the wellbore after the explosion by hydraulic fracturing, forming a complex fracture network, which is of great significance to the exploitation of deep shale oil and gas. Based on the theory of maximum energy release rate, the calculation formula of energy release rate of fracture propagation in broken rock was derived firstly. Then, combined with cohesive element and random Thiessen polygon, the hydraulic propagation model in broken rock was established. The influence of stress difference, number of broken elements, fracture toughness ratio, construction displacement and initial fracture number on hydraulic fracture propagation was analyzed. The results show that when the stress difference increases from 1 MPa to 9 MPa, the total crack length and average crack extension rate decrease by 37. 79% and 33. 11%, respectively. The increase of fracture toughness ratio will greatly improve the fracture pressure and reduce the interference of stress difference. When the fracture toughness ratio increases from 0. 1 to 0. 5, the total fracture length increases by 38. 46%, and the average fracture elongation rate decreases by 32. 10% . The displacement and the number of initial fractures around the well are positively correlated with the total fracture length and the average fracture extension rate, but the number of fracture units hardly changes the fracture extension rate and is positively correlated with the total fracture length. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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 Science Technology & Engineering 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.)

The microchannel equipment has efficient heat and mass transfer capabilities, which is conducive to the effective mixing of gas-liquid multiphase flow, thus improving the production efficiency of industrial applications. However, for industrial applications, the study of gas-liquid two-phase flow patterns in microchannels with irregular shapes has always been a difficult point. Based on the optimized Y-shaped composite microchannel structure, the flow visualization experiment of the full flow field in the complex microchannel was carried out, which realized the comprehensive measurement of the gas-liquid multiphase flow pattern under different flow rates in the microchannel, obtained the gas-liquid two-phase flow distribution in the microchannel based on high-speed photography, judged the internal flow pattern in the Y-shaped composite microchannel, and conducted numerical simulation of the gas-liquid two-phase flow pattern. The pressure distribution along the flow path was extracted. Time averaged characteristic area was used to evaluate the area of high efficient gas-liquid mixing region under different flow patterns. The numerical simulation results show that the flow pattern of gasliquid multiphase flow significantly affects the mixing intensity of gas-liquid multiphase flow, promotes the mixing effect of gas-liquid two-phase flow, and increases the gas-liquid contact area. [ABSTRACT FROM AUTHOR]

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Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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 Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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 Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine 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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