Results 21 to 30 of about 3,405 (163)
应用Le Bissonnais法测定富铁土中团聚体的稳定性及其意义
Shuitu Baochi Xuebao, 2004 土壤团聚体的数量和稳定性是衡量土壤抗蚀性和土壤质量的重要指标,应用LeBissonnais法对富铁土团聚体的稳定性和物理学机制进行了研究。结果表明,LeBissonnais法测定的团聚体平均重量直径(MWD)与常规湿筛法测定的>0.25mm团聚体含量、MWD和>2mm团聚体破坏率(PAD)呈极显著正相关。富铁土中5～2,2～1,1～0.5mm团聚体经快速湿润(FW)、慢速湿润(SW)和预湿后扰动(WS)处理后,稳定性团聚体的粒级分布随处理方式和初始团聚体大小的不同而不同;经FW处理后,大多数团聚体崩解 ...
卢升高 竹蕾 郑晓萍
doaj +2 more sources
Comparasion study on the effects of mangrove wetland sediments on the sequestration of typical sulfonamides from the estuarine water [PDF]
, 2015 作为陆地污染物进入海洋的屏障，红树林已然成为众多典型污染物汇聚的场所之一。近年来，海产养殖业的大肆兴起更是加重了抗生素在红树林区的直接污染。锁定态是控制土壤抗生素归宿的主要因素，具有环境存在时间长，危害大等特点，可通过再释放重回到环境中，对环境造成长期危害。对典型磺胺类在红树林群落沉积物中锁定能力的研究对于探索抗生素在红树林区的环境行为和红树林湿地抗生素污染控制及修复功能评估具有现实意义。本文选取了12种水产、禽畜及人用较为频繁的典型磺胺类药物，分别为磺胺甲噻二唑(sulfamethizole,SMT)、
张宇
core
Rare Metals, EarlyView.ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo +3 more
wiley +1 more source
Gradient distributions of nitrogen and organic carbon in the soils from inland to tidal flat in the Yellow River Delta [PDF]
, 2014 黄河三角洲是我国典型的通过黄河冲积泥沙填海造陆形成的近代沉积区。区域受到黄河冲积、沉积等自然过程和农业耕种熟化等人类活动的双重影响。本研究通过在黄河三角洲地区内陆到河口海湾不同距离采集典型土壤类型剖面发生层样品，探讨土壤有机碳、总氮等生源要素的空间分布规律，为阐明我国典型海岸带地区陆源碳、氮的输送及循环特征提供基础依据。研究结果表明，黄河三角洲内陆与河口地区呈现出完全不同的土壤碳、氮分布规律。表层土壤碳、氮含量在黄河沿岸及三角洲南部均表现出由陆向海逐级递减的空间分布特征 ...
李远 +4 more
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Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates [PDF]
[Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can ...
HAN Guangzhong +4 more
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Policy Studies Journal, EarlyView.Abstract Studies of lobbying typically look at the extent to which interest groups realize political goals on issues they actively lobby for. Little is known, however, about the extent to which interest groups attain their political goals without making an active lobbying effort.
Marcel Hanegraaff +2 more
wiley +1 more source
, 2018 21世纪是生物制药的黄金时代,以重组蛋白药物和治疗性抗体为代表的蛋白质药物已成为生物技术药物的重要组成部分,其对恶性肿瘤、自身免疫性疾病、病毒感染等重大疾病的治疗效果和生物安全性远高于小分子化学药物。但是蛋白质稳定性差,在生产、纯化、运输和储存等过程中,容易因环境刺激或自身稳定性等因素产生团聚,从而导致药效降低,并可能引发免疫反应。发展灵敏度高、分辨率好、简便实用的蛋白质团聚检测技术和方法,对蛋白质药物的研发和改良可起到积极的推动作用。本文针对蛋白质团聚的检测技术和方法进行综述,从检测原理 ...
颜晓梅, 高恺旻
core
Characteristics of Erosive Rainfall and Its Effects on Runoff and Sediment Yield in a Low Mountain and Hilly Area of Lianyungang City [PDF]
, 2022 [Objective] The effects of different rainfall characteristics and different underlying surface conditions on soil erosion and sediment yield were determined in a low mountain and hilly area of Lianyungang City, Jiangsu Province, in order to provide a ...
Cheng Jianmin +3 more
core +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Two‐dimensional MXene‐based materials have recently attracted attention in supercapacitors and lithium ion batteries due to their excellent electrochemical performance. However, the capacity and agglomerate limits the development of MXene‐based materials.
Han Zhang +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2006 土壤有机碳是土壤团聚体形成的重要胶结剂之一，土壤团聚体分布影响有机碳含量及其稳定性。对子午岭植被恢复过程中团聚体有机碳含量变化的研究结果显示：相对于农田，植被恢复可增加土壤各个粒径团聚体有机碳含量．同时增加不同层次土壤团聚体有机碳含量。就粒径而言，虽然各个植被下〈0．25mm土壤团聚体有机碳含量最低，植被类型变化对土壤团聚体有机碳含量影响最大的是〈0．25mm粒径，辽东栎林地〈0．25mm土壤团聚体有机碳含量是农田〈0．25mm团聚体有机碳含量的3倍；其次，植被类型对〉5mm团聚体有机碳含量影响较大 ...
赵世伟 +4 more
doaj +2 more sources