Results 31 to 40 of about 1,455,802 (139)
ABSTRACT This study examines how foreign language teachers’ beliefs about the medium of instruction and translanguaging evolve over time by revisiting three in‐service teachers twelve years after their initial interviews. Using a qualitative longitudinal design, the study traces how translanguaging was initially framed as pedagogically deficient but ...
Danping Wang
wiley +1 more source
ABSTRACT Agricultural development initiatives in sub‐Saharan Africa have emphasized improved crop varieties as a pathway to food security, resilience, and rural poverty reduction. However, empirical evidence often focuses narrowly on plot‐level outcomes and overlooks whole‐farm effects and the substantial heterogeneity in farmers' management practices,
Kodjo Kondo +4 more
wiley +1 more source
ABSTRACT This critical ethnographic study examined the perspectives of service providers and organizational leaders working within charitable food services for people experiencing homelessness in two Canadian cities. Informed by Paulo Freire's writings and a human rights‐based approach, we explored how power is enacted through everyday practices and ...
Corinna Easton +4 more
wiley +1 more source
生物毒性测试对于水质安全评估至关重要。环境水体含有组成复杂的已知和未知化学物质,而往往这些物质的生物毒性效应只有在高倍浓缩条件下才能产生。为了准确评估水样的生物毒性,需要选择合适的样品前处理方法。对液-液萃取和固相萃取的方法原理以及其在环境水样毒性测试中的应用进行了归纳总结,在此基础上对比分析了二者的适用场景,旨在为水样生物毒性测试选择合适的样品前处理方法提供参考。
周嘉伟 +3 more
doaj +2 more sources
Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
wiley +1 more source
ABSTRACT The move from unipolarity to a fluid and contested multipolar world order has significantly changed the way African nations form national security policy due to changes in the nature of the strategic environment of those states. Much of the literature has focused on how the actions of major world powers ‐ the United States, China and Russia ...
Chick Edmond +2 more
wiley +1 more source
Strategic Ambiguity in Development Finance: How Developing States Leverage US‐China Rivalry
ABSTRACT Does intensifying US‐China rivalry in development finance empower developing countries, or deepen their dependence? This article argues that it does both, through a mechanism called strategic ambiguity: the deliberate maintenance of relationships with multiple, competing creditors, maximizing access to resources while avoiding binding ...
Oluwaseyi B. Ayeni +2 more
wiley +1 more source
水解断裂(shedding)是指L-选择素受到炎症刺激因子或趋化因子激活后,被存在于膜内的金属蛋白酶水解,从细胞外近膜端断裂,形成游离在体液中和镶嵌在膜上的部分。水解断裂是L-选择素特有的生物学现象,对于调控其生理功能具有重要意义。目前,对水解断裂影响L-选择素结构、反应动力学和生理功能等方面的了解仍不清楚。例如:水解断裂是否会导致L-选择素的结构发生变化,是否与L-选择素快速动力学反应特点有关 ...
贾潇凌, 龙勉
core +2 more sources
The End of the Observable Infodemic: Privatised Observability and Public Health Monitoring
ABSTRACT Infodemiology and infodemic management rest on a premise so foundational that it is rarely stated: health information behaviour leaves traces that researchers and public institutions can observe. This paper argues that the premise is dissolving.
Christoph Dockweiler
wiley +1 more source
Research Progress and Prospect of Single‐Atom Materials in Tumor Catalytic Therapy
ABSTRACT Tumor catalytic therapy (TCT), an emerging therapeutic modality, exerts specific cytotoxic effects on tumor cells by catalyzing endogenous substances within the tumor microenvironment (TME)—including hydrogen peroxide (H2O2), glucose, and glutathione—to generate reactive oxygen species (ROS) or deplete protective biomolecules.
Youyu Wang +4 more
wiley +1 more source

