Results 31 to 40 of about 9,186 (162)
Rare Metals, EarlyView.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2011 以太湖流域典型蔬菜地为研究对象,采用田间径流池法进行田间小区试验,研究不同施肥模式下蔬菜地地表径流氮磷流失特征。结果表明:地表径流总氮流失量为45.76～60.45 kg/hm2,总磷流失量为2.67～3.95 kg/hm2。与常规施肥相比,优化施肥可使地表径流氮磷流失量分别减少2.48,0.31 kg/hm2;而增氮施肥和增磷施肥处理的地表径流总氮流失量分别增加了7.76%,3.83%,总磷流失量增加2.84%,9.55%。总氮、总磷流失量与径流量呈显著线性相关,且总磷流失量与径流量的相关性更强(R2=
王春梅, 蒋治国, 赵言文
doaj
Method Development of Trace Urea in Seawater and Its Application in Different Environmental Samples [PDF]
, 2015 尿素，作为最主要的小分子溶解态有机氮，主要来源于浮游生物的代谢和有机物的再矿化。尿素可以直接被浮游植物和细菌等循环利用，作为主要氮源之一，在海洋真光层中对再生生产力的贡献不容忽视，因此尿素在全球海洋碳、氮生物地球化学循环过程中扮演着重要的角色。目前海水中尿素的测定方法主要是丁二酮肟分光光度法，已报道的分析方法在检测限和重现性方面都无法满足尿素研究痕量、准确和快速的测定需求。 针对现有不足，本论文通过探索海水样品中尿素显色反应的动力学过程，优化试剂比例，得到稳定的显色产物，有效地克服以往方法重现性差的问题，
陈莉
core
Effects of Breccias and Round Gravels on Steep Cut Slope Runoff and Sediment Yield Under Simulated Rainfall [PDF]
, 2023 [Objective] The effects of breccias and round gravels on steep cut slope infiltration, runoff, sediment yield, and hydrodynamic characteristics were analyzed in order to provide a theoretical basis for a soil erosion prediction model and soil ...
Cao Longxi +5 more
core +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Developing efficient catalytic thermal desorption systems is of great significance in the field of sustainable soil remediation. Herein, novel Mn–Ce solid solution modified Co3O4 nanocrystals were successfully prepared for the removal of perfluorooctanoic acid (PFOA) in soil.
Yu‐Hao Liu +8 more
wiley +1 more source
Shuitu Baochi Xuebao, 2001 研究了 6种不同农作措施下红壤坡耕地水土流失特征 ,结果表明 :同顺坡农作措施相比 ,其它农作措施均具有明显减轻水土流失的作用 ,休闲处理能减少径流流失 4 2 .8% ,减少泥沙流失量 85 .0 2 % ;等高土埂处理能减少径流流失 70 .2 0 % ,减少泥沙流失量 95 .0 4 % ;水平草带能减少径流流失 3 2 .3 3 % ,减少泥沙流失量 4 5 .88% ;水平沟处理能减少径流流失 4 5 .6% ,减少泥沙流失量 63 % ;等高农作能减少径流流失 5 6.3 3 ...
袁东海 张如良 等
doaj +2 more sources
Shuitu Baochi Xuebao, 2011 通过模拟降雨试验,分别研究1.0mm/min和2.0mm/min雨强条件下,不同坡面上径流过程和土壤氮素流失特征。结果表明,在1.0mm/min雨强条件下,每个产流阶段径流变化量依次为18°>28°>21°,峰值出现时间依次为21°>18°>28°,径流峰值量依次为28°>18°>21°;硝态氮淋溶与土壤侵蚀同步进行;铵态氮流失量峰值的出现是坡面顶部和下部流失量的叠加结果,随后铵态氮流失量趋于降低;在2.0mm/min雨强条件下,每个产流阶段径流变化量不同,峰值出现时间依次为18°>21°>28 ...
刘泉 +5 more
doaj
Impacts of storm event on DOM composition and flux in two Jiulong Tributaries with different watershed features [PDF]
, 2016 通过调查2014年7月"麦德姆"台风影响期间福建九龙江北溪(流域以林地为主)和西溪(农业流域和城市背景)下游定点站DOM的时间序列,测定样品的DOC含量及其吸收光谱和三维荧光光谱,以评估不同流域背景对河流DOM动力学降雨响应的差异性,并为流域-河口系统的一体化管理提供重要参考。降雨期间,两条河流DOC浓度、吸收系数aCDOM(350)以及总荧光强度均随径流量升高而增大,并在水位下降期持续增加,且西溪增加量明显高于北溪,说明受人类活动扰动大的流域河流有机质对暴雨事件的响应更为灵敏 ...
徐静 +5 more
core
Erosion Characteristics and Its Simulation of Erosion Amount for an Artificial Forest in an Exposed Feldspathic Sandstone Area [PDF]
, 2022 [Objective] The rainfall characteristics and water and sediment control ability of different types of artificial forestland in an exposed feldspathic sandstone area were determined in order to provide guidance for vegetation construction in the study ...
Dong Xiaoyu, Qin Fucang, Yang Zhenqi
core +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT The design of nanoparticles confined in hollow N‐doped carbon structures is crucial for improving the oxygen reduction reaction (ORR) kinetics, yet achieving this remains a significant challenge. In this work, hollow porous nitrogen‐doped carbon encapsulated FeP/Fe2P (H‐FeP/Fe2P) were successfully constructed via a templating method combined ...
Li‐Xia Wang +8 more
wiley +1 more source