Results 31 to 40 of about 4,056 (198)
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
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
core +1 more source
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
core +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT To address the issues of aluminum (Al) powder agglomeration during combustion and low oxidizer decomposition efficiency in composite solid propellants, this study utilized in situ self‐assembly technology to prepare cobalt‐based hybrid‐coated modified Al powder (Al@CZ).
Chong Chen +11 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
Rare Metals, Volume 45, Issue 3, March 2026.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
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
Sorption /desorption behaviors of pyrene on mangrove sediment aggregates with different sizes [PDF]
, 2014 采用海藻酸钙凝胶包覆的方法,研究了芘在九龙江河口红树林区不同粒径沉积物团聚体上的吸附/解吸行为.结果表明,海藻酸钙凝胶包覆可有效减少沉积物团聚体粒径的改变,其等温吸附、吸附/解吸速率情况与未包覆沉积物团聚体存在明显差异.包覆后等温吸附曲线中吸附容量kf值取决于总有机碳(TOC)的含量,非线性吸附常数n不仅与其硬碳和软碳的比值有关,还与团聚体复杂的孔隙结构存在着一定的关系.包覆后沉积物团聚体的快吸附速率常数值与沉积物团聚体的比表面积值正相关(krAP=0.041S-0.0146,r2=0.9923 ...
刘贝贝, 张勇, 朱亚先, 李锐龙
core
Effects of Organic Fertilizer Substitution and Aggregation on Microfauna Communities in a Red Soil [PDF]
[Objective] Red soil is a typical soil in Southern China, and organic substitution is an important way to improve the physicochemical properties of red soil.
DING Weixin +6 more
core +1 more source
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