Results 41 to 50 of about 3,405 (163)
Study on the sorption/desorption of PAHs and effects of MWCNTs on distribution of PAHs in mangrove sediment aggregates [PDF]
, 2014 红树林是热带、亚热带河口潮间带重要的生态系统。沿岸人类活动加剧，使PAHs大量进入红树林生态系统。红树林沉积物作为该生态系统中PAHs最重要的赋存场所，PAHs在其中的迁移、转化过程引起广泛的关注。吸附/解吸作为PAHs迁移、转化过程中的重要环节，控制生物富集、生物降解等诸多过程。目前实验室中考察吸附/解吸行为多以分散颗粒物为研究对象，然而现实环境中红树林沉积物以团聚体的形式存在，以沉积物团聚体为研究对象，考察PAHs的吸附/解吸行为具有重要的理论和实际意义。 第一部分绪论 ...
李锐龙
core
How Patterns of Democracy Impact Policy Processes: When Lijphart and Sabatier Meet
European Policy Analysis, Volume 11, Issue 2, Page 254-270, Spring 2025.ABSTRACT Policy process theories and institutional theories are two foundational strands in political science, both concerned with how people engage in politics. However, they differ in their focus, with policy process theories emphasizing the roles of actors, while institutional theories concentrate on the structures in which these actors are embedded.
Karin Ingold +4 more
wiley +1 more source
Review of Policy Research, Volume 41, Issue 6, Page 941-960, November 2024.Abstract In the literature on policy advice and analytical communities in democratic settings, think tanks are often assumed to be carriers of new ideas that serve as an informed and independent voice in policy debates. However, how much intellectual independence do think tanks have in authoritarian environments? This article tackles this question in a
Vera Axyonova
wiley +1 more source
Shuitu Baochi Xuebao, 2020 利用田间定位试验研究旱作农田不同覆盖措施对土壤团聚体氮组分的影响。基于黄土高原8年冬小麦覆盖定位试验，试验设置生育期秸秆覆盖（SM）、生育期地膜覆盖（PM）和无覆盖对照（CK）3个处理。采用干筛法测定团聚体分布特征及不同粒径团聚体中全氮（STN）、微生物量氮（MBN）和潜在可矿化氮（PNM）含量。结果表明：（1）与CK处理相比，2种覆盖处理均未在各粒径团聚体全氮含量有显著变化，但SM处理相较于PM处理提高了0—10 cm土层的1.00~0.25 mm粒径团聚体STN含量（12.88%，P2.00，2 ...
张少宏 +4 more
doaj
Multi-element Accurate Analysis of Sulfide Minerals by Low-temperature Ablation LA-ICP-MS [PDF]
, 2023 BACKGROUNDMicro-geochemical information of sulfide minerals plays a crucial role in the field of geochemistry, allowing discovery of the formation mechanism and evolution process of sulfide minerals by analyzing their element composition characteristics.
Dingwen ZHANG +5 more
core +1 more source
European Policy Analysis, Volume 10, Issue 3, Page 311-333, Summer 2024.Abstract Policy networks can propose solutions (policy communities, and epistemic communities), defend specific instruments (instrument constituencies), and programmatically prioritize change or stability (programmatic groups). This paper focuses on two specific networks that have been present in 30 years of administrative reform in Italy, and it ...
Giliberto Capano +3 more
wiley +1 more source
Effects of Different Vegetation Restoration Measures on the Disintegration Characteristics of Eroded Degraded Land of Pinus massoniana in Red Soil Region [PDF]
[Objective] To investigate the characteristics of soil disintegration under different vegetation restoration measures in degraded land of Pinus massoniana, compare the improvement of soil disintegration in severely degraded P.
LIN Qiang +8 more
core +1 more source
European Policy Analysis, Volume 10, Issue 3, Page 356-379, Summer 2024.Abstract While scholars have investigated how media frame human mobility and securitize irregular border crossings, little research has been dedicated to how European Union (EU) actors are portrayed in media coverage of migration across the Mediterranean. By integrating framing into narrative analysis through the Narrative Policy Framework, our article
Martina Abisso +2 more
wiley +1 more source
Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background [PDF]
[Objective] To study the vertical distribution pattern of cadmium (Cd) in shallow karst fissure soil, analyze the impacts of various factors on the distribution of Cd in fissures, and provide a scientific basis for future research on the distribution ...
CAI Huayin +6 more
core +1 more source
Long-term straw incorporation significantly reduced subsoil organic carbon stock in cinnamon soil [PDF]
, 2020 peer ...
Xu, Hu +5 more
core +1 more source