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麋鹿属于国家Ⅰ级保护动物，对麋鹿种群在枯水期江滩湿地的生境选择特征进行调查分析，可为麋鹿种群的保护与管理提供科学依据。2017年秋季至2019年春季，运用种群生态学、行为生态学等研究方法，调查并比较了48个利用样方与41个对照样方，分析了石首麋鹿在长江枯水期的生境选择。研究表明，对长江枯水期麋鹿生境选择起到重要作用的关键因子分别为扰动因子、水源因子和隐蔽因子。长江枯水期麋鹿生境选择资源函数为：z=-0.518+1.672×人为干扰距离-0.186×水源距离-2.463×道路距离+0.224×隐蔽度-0.366×地表植被盖度-0.862×土壤湿润度。各观察指标的显著性水平上，道路距离达到极显著水平（P

In order to prepare shape memory polymers with remote controllable deformation and superior performance, PCL/CB composites were prepared by thiol-ene click chemistry method, and their chemical structures, thermal properties and shape memory properties were characterized via FTIR, DSC, ¹H NMR and DMA. The results indicate that the thermal transition temperature is 50 ℃, and when the pre-stretched composite film is irradiated by a 100 mW/cm² laser, the CB particles absorb laser photons and produce photothermal conversion. Due to the relaxation of the anisotropic chain and the release of strain energy, the upper layer shrinks due to the melting of crystal regions when irradiated with laser, while the lower layer is still in a glassy state. The shrinkage force of the upper film causes the PCL/CB composite material film to bend and deform toward the direction of laser irradiation. At the same time, the bending angle can be controlled by three parameters:pre-stretch strain, irradiation time, and film thickness. When the prestretch strain is 300% and the film thickness is 0.4 mm, the maximum bending angle is 164°. The PCL/CB composite film with locally programmable behavior can provide new ideas for the deformation mode of light responsive SMP. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board 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.)

采用电化学生物膜法对模拟地下水中的硝酸盐污染进行去除，研究了温度、进水pH、水力停留时间(HRT)和电流强度对电极生物膜反应器(BER)反硝化脱氮性能的影响.研究结果表明：20 d左右反应器成功启动，电镜扫描显示阴极表面被大量微生物覆盖；在13.6〜34.0 ℃时，的去除效率随温度升高而上升；BER对进水pH冲击具有较强的缓冲能力，在6.25〜8. 27内的去除效率可保持在85%以上；最佳HRT为9 h，此时-N去除率不低于85%；电流强度从13 mA提高到102 mA过程中，的去除率不断增加，最后保持稳定，电流强度为78〜102 mA时，反硝化效果较好，去除率大于85%，且没有的积累现象.过高的电流强度会加速阳极碳棒的溶解.

Copyright of Journal of Xi'an Polytechnic University is the property of Editorial Department of Journal of Xi'an Polytechnic 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.)

Copyright of Chinese Journal of Pesticide Science / Nongyaoxue Xuebao is the property of Chinese Journal of Pesticide 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 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 Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board 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.)