Results 31 to 40 of about 31,258 (146)

Determination of 13 polybrominated diphenyl ethers in soil by matrix solid phase dispersion method and gas chromatography/ mass spectrometry(基质固相分散-气相色谱/质谱法测定土壤中13种多溴联苯醚)

Zhejiang Daxue xuebao. Lixue ban, 2017
建立了基质固相分散萃取-气相色谱/质谱法测定土壤中13种多溴联苯醚的分析方法.对固相分散剂种类、样品与分散剂用量比例、洗脱溶剂及用量进行了选择和优化.最佳前处理条件为：2 g样品与4 g酸性硅胶固相分散剂研磨10 min，混合物装入预先填好4 g无水硫酸钠和4 g酸性硅胶的玻璃柱中，以50 mL正己烷/二氯甲烷(v：v= 1:1)混合液洗脱并浓缩至0.5 mL，进GC-MS分析.13种多溴联苯醚在2~200 ng • g-1内呈良好的线性关系(R2>0.992).平均加标回收率在81%~103 ...
WEIZi(魏孜), ZHUYaer(朱亚尔), SONGYao(宋瑶), ZHANGYuduo(张瑜铎), SUNJianteng(孙建腾)   +4 more
doaj   +1 more source

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Lughawiyah: Journal of Arabic Education and Linguistics, 2019
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Lathifah Al Husna, Suharmon Suharmon, Amrina Amrina   +2 more
openaire   +1 more source

The Training Complex: Shattering of the Coniunctio, Boundary Violation, and Sibling Turbulence on the Horizontal Plane

Journal of Analytical Psychology, EarlyView.
Abstract This paper explores what is happening, for a trainee, when an ethical boundary violation occurs by the analyst with a fellow peer in training. I am approaching this through the Jungian concept of the alchemical vas as I attempt to make meaning of a catastrophic collapse of the analytic work.
Anne Marie Allen
wiley   +1 more source

When and why to give shorebirds a head start

Conservation Biology, EarlyView.
Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson, Alex Nicol‐Harper, Rebecca Lee, Nigel S. Jarrett, Geoff M. Hilton   +4 more
wiley   +1 more source

Role of funders in embedding tests in conservation practice

Conservation Biology, EarlyView.
Abstract Effective conservation practice requires decisions based on reliable and relevant evidence, but significant gaps in the evidence base exist. Incorporating well‐designed tests of the effectiveness of interventions for biodiversity in conservation projects is one of the best ways to scale up the rate of evidence generation.
Rebecca K. Smith, Nancy Ockendon, Nida Al‐Fulaij, Alessandro Badalotti, Rachel Beattie, James Byrne, Sophia Cooke, Tiago de Zoeten, Winifred F. Frick, Stephan M. Funk, Douglas Gibbs, Lauren Gupta, Tatiana Hendrix, Becky Holmes, Nicola Johnstone, James Kinghorn, Simon Mickleburgh, Florence Miller, Matthew Muir, Jacob R. Owens, Danni Parks, Victoria Reilly‐Pinion, Hannah Reid, Kevin Seely, Julien Semelin, Taylor Shaw, Ruth D. Swetnam, Lisa Wheeler, William J. Sutherland   +28 more
wiley   +1 more source

Behavioral interventions to reduce demand for threatened freshwater turtles as pets

Conservation Biology, EarlyView.
Abstract Growing demand for freshwater turtles as pets has fueled illegal trade and accelerated wild population declines, underscoring the need for theory‐based demand‐reduction interventions. We conducted a three‐part randomized controlled trial with active turtle keepers (n = 1800) in China to test conservation‐ and legality‐framed messages by ...
Wuji Zheng, Beilu Duan, Anita Kar Yan Wan, Alexander Clark, Toby Park, Kristina Londakova, Freddy Parker, Xiaoxi Zhang, Lishu Li, Tien Ming Lee   +9 more
wiley   +1 more source

关于断路器失步关合和开断试验中试验方式OP1免试条件的分析

Gaoya dianqi, 2021
断路器作为电力系统中的重要元件,有着完整的型式试验要求,其中有一项为失步关合和开断试验。GB/T 1984—2014与DL/T 402—2016中对于断路器的失步关合和开断试验有着详细的描述[1-4],这两个标准中都有对试验方式OP1免试条件的叙述,其意思均为"若进行了5%Isc临界电流试验,则OP1可以免去。"这个判据在行业中已使用了20年,随着断路器开断原理、灭弧方式以及制造工艺的进步,这一判据在实际使用中已有所不适。文中对系统工况、失步关合和开断试验及相关型式试验的试验原理、现行国内标准进行分析 ...
姜子元, 田恩文, 何冰, 金庆滨, 宇文博   +4 more
doaj  

How endorser attributes influence conservation communication

Conservation Biology, EarlyView.
Abstract Conservation communication often uses the celebrity endorsement strategy. However, robust evidence regarding its effectiveness is still limited. More importantly, practitioners do not have guidelines for selecting an ideal endorser because there is no clear consensus on what endorser attributes are most critical.
Xia He, Tien Ming Lee
wiley   +1 more source

核药厂衰变池废水及周边水样中¹⁴C的快速筛查法

Fushe yanjiu yu fushe gongyi xuebao
为快速筛查对象水体中14C的存在与否，并提供定量测量结果，采用液闪计数区域优化的方法，结合内标法确定猝灭效应下的计数效率，实现了样品中14C活度浓度的快速准确分析，探测下限为1.8 Bq/L。应用于某核药厂衰变池及周边环境水样中14C活度浓度的分析，其中3个样品活度浓度低于探测下限，其余样品活度浓度分布在38~1 332 Bq/L。自制活度浓度已知的样品验证了该方法的准确性，测量结果相对参考值最大偏差仅1.1%。
戈 立新, 韩 刚, 赵 超
doaj   +1 more source

Artificial Intelligence for Language Learning: A Systematic Review of its Design, Theoretical Foundations, Implementation, and Impact

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao, Michelle Mingyue Gu, Chaoqun Lu   +2 more
wiley   +1 more source