Results 41 to 50 of about 4,382,920 (183)
Facets of Crises: How Problem Indicators and Public Perceptions Affect Policy Change
Policy Studies Journal, EarlyView.ABSTRACT Crises are widely acknowledged as catalysts for policy change. Yet, our understanding of the policy effects of crises remains limited. Why do only some crises lead to major changes, while significant policy changes also occur during seemingly non‐crisis periods?
Constantin Kaplaner +6 more
wiley +1 more source
Gongye shui chuli, 2008 在某电器厂,采用将电镀废水按含铬废水、含氰废水、综合废水分类收集,之后用化学法分别处理的方法处理该厂电镀废水。经调试运行表明化学处理法处理电镀废水效果稳定可靠,主要污染物去除率可达95%以上,处理后出水水质全部达到《污水综合排放标准》(GB8978—1996)中一级标准及第一类污染物最高允许浓度标准要求。
刘启明, 林锦美, 黄锦山
doaj
The underappreciated roles of fog and dew on vegetation and biocrusts
New Phytologist, Volume 251, Issue 1, Page 46-63, July 2026.Summary Fog and dew represent minor components of ecosystem water budgets in most ecosystems. However, fog and dew can play an essential role in ecosystem dynamics and are particularly important for water‐limited systems. In addition to serving as direct water inputs, fog and dew can influence microclimate and water redistribution, thereby promoting ...
Lixin Wang, Yue Li, Mengyun Sun, Na Qiao
wiley +1 more source
, 1990 <正> 稀土配位化学在整个配位化学中占有突出的地位.S.P.Sinha等曾对截止到1982年的220个稀土配合物作过统计.??等于1984年曾对稀土元素化合物的晶体结构特征进行过综述.本文利用剑桥数据库的资料在中国科学院化工冶金所的Vax机系统上运行,从七万多个配合物的结构数据中检索到686个稀土配合物的结构数据.它包括1935-1988年全部公开发表了的并已收入数据库的数据 ...
徐光宪 +5 more
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Huli yanjiu, 1990 激励是组织行为的核心问题,也是管理中的一项极其重要的职能,善用激励调动人的积极性,是所有社会团体提高社会效益的一个重要手段。 在医学由生物医学模式向生物、心理、社会医学模式转变、医院实行以科主任为首的经济承包责任制的社会环境中,如何根据护理工作的特点,护理人员的组织结构,运用激励——这一现代化管理方法,提高护理人员的势气,把改革引向深入,值得每个护理管理者探讨,调查者一九八九年四月间对哈医大二院、黑龙江省医院,齐医学院附属一、二院的护理队伍的知识结构 ...
田秀杰, 尹维燕, 江虹
doaj
Review of Policy Research, Volume 43, Issue 4, July 2026.ABSTRACT The accelerated digitalisation of society has amplified cybersecurity threats and revealed their cross‐sectoral nature. Yet, the policy instruments used to address these challenges remain insufficiently examined. This study conducts a scoping review of 980 academic articles (2007–2024) and applies Hood's NATO framework (Nodality, Authority ...
Benedetta Cotta, Maria Stella Righettini
wiley +1 more source
, 2006 近年来,人们合成了各种各样的MgO纳米结构。例如纳米棒、纳米鱼骨、纳米线、纳米带、纳米管及三维的纳米结构。然而,连续合成一系列的MgO纳米结构和基于热力学、动力学的生长机理研究还是比较少的。我们用金属镁粉为原料,以流动的氩气为载气,制备了不同形貌的氧化镁纳米结构。如:单晶纳米线、单晶纳米花、单晶纳米球。对各种结构的形成进行广西自然科学基金资助项目(桂科基0575030);广西自然科学基金资助项目 ...
周泽广 +4 more
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Shuitu Baochi Xuebao, 2011 针对长期不合理高化肥投入量导致城郊区菜地土壤环境恶化的现状,为探讨氮肥减施对城郊区菜地土壤氮磷累积及蔬菜产量品质的影响,应用田间小区试验,研究了长沙市郊2种不同菜地土壤中,氮肥减施20%与缓释尿素,脲酶抑制剂/硝化抑制剂,土壤调理剂配合施用的环境和农学效应。结果表明:与常规施肥处理相比,采用缓释尿素减施20%化学氮肥(80%N(CRU))有效降低了菜地土壤Olsen-P和NO3--N的含量,减少了其面源污染风险,但该处理蔬菜可食部分容易累积硝酸盐,也增加了食用风险;通过添加脲酶抑制剂/硝化抑制剂减施20%
全智 +6 more
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Dehydrogenation Thermodynamic and Kinetic Challenges of Mg‐Ni‐Based Alloy Hydrides
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Solid‐state hydrogen storage stands as a pivotal, safe, and efficient solution for the future hydrogen economy. Among diverse hydrogen storage systems, Mg‐Ni‐based alloy hydrides are recognized as cornerstone materials. However, their practical application is hindered by two core challenges: the high thermodynamic stability of the hydride ...
Jinglan He +6 more
wiley +1 more source
, 2005 本发明涉及保健食品，具体地说是一种调节血脂和保护化学性肝损伤的保健食品及其制备，按重量比计，包括壳寡糖10-80％；五味子10-80％、葛根5-40％。本发明优点为：具有调节血脂和对化学性肝损伤有辅助保护功能，成本低，功效好，无副作用，属天然产品；产品具有易吸收，易利用，效果更显著等特点。对调节血脂，抗氧化，清除自由基，保护细胞膜，改善微循环，促进损伤组织修复以及保护化学性肝损伤，维持了膜的结构和功能的完整，降低转氨酶改善肝脏功能都有很好的作用 ...
孟令玗 +5 more
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