Results 21 to 30 of about 701,768 (130)
Shuitu Baochi Xuebao, 2011 采用野外调查采样和室内培养、分析相结合的方法,探讨蔬菜对多氯代有机污染物(PCOPs)的富集和转移特征。结果表明:不同旱地蔬菜对不同PCOPs的富集能力和转移能力各不相同,主要体现在叶菜类对六六六(HCB)的富集系数最高,根菜类对滴滴涕(DDT)类的转移系数最高等特点;不同盆栽蔬菜的富集和转移特点和旱地蔬菜的基本一致,且随着土壤受污染程度的加剧会导致其富集系数和转移系数降低,这与蔬菜生物量较小而影响其对PCOPs的富集和转移能力有关 ...
万大娟, 贾晓珊, 谭长银
doaj
Poverty &Public Policy, Volume 18, Issue 3, September 2026.ABSTRACT This paper examines the impact of the COVID‐19 pandemic on income and wealth inequality in Switzerland, with a particular focus on poverty dynamics and the role of the social security system. Using newly linked administrative tax data for four large cantons covering over a third of the Swiss population, we track changes in household income and
Oliver Hümbelin +2 more
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Tracing change in the public perception of plants: insights from archives and social media in China
PLANTS, PEOPLE, PLANET, Volume 8, Issue 5, Page 1853-1871, September 2026.As urbanization accelerates, historic gardens serve as vital cultural treasures that offer spiritual and cultural support to the public. This study proposes an innovative approach that merges historical records from the Qing Dynasty with contemporary social media data to explore changes in public perceptions of these gardens.
Dong Xu +4 more
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Shuitu Baochi Xuebao, 2004 以黄壤作为供试土壤,种植重金属富集植物与非富集植物,采用室内培养方法对外加镍污染黄壤的微生物活性及其群落结构进行了研究。结果表明:较低浓度Ni有利于提高土壤微生物活性,当Ni浓度>100 mg/kg时供试土壤的微生物活性开始下降,其中微生物生物碳、氮量和基础呼吸随重金属浓度增加而明显下降,但种植重金属富集植物的土壤下降幅度明显低于种植非富集植物的土壤。结果还显示,镍严重污染破坏了土壤微生物区系,使土壤细菌、放线菌及真菌数量下降,其中放线菌对重金属毒性影响最为敏感 ...
陆引罡 黄建国 滕应 罗永水 王荣平 湛方栋
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Zhejiang Daxue xuebao. Lixue ban, 1999 建立了流动注射在线微柱预富集-火焰原子吸收(FAAS)法测定天然水中痕量镉的体系.在溶液pH7.2条件下，8-羟基喹啉-5-磺酸与Cd2+形成的络阴离子被填有阴离子树脂的微柱吸附而富集.用1mol/L硝酸溶液洗脱树脂上所吸附的镉.洗脱液在线输入FAAS测定.当采样速率为24次/时，富集倍数为10，检出限0.5μg/L，工作曲线线性范围0～100μg/L，RSD为1.0%(n=11,Cd2+浓度为100μg/L).本体系已用于天然水样中痕量镉测定，回收率90%～106%.
MaoXueqin(毛雪琴) +4 more
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Ni‐Induced Interface Refinement Enhances Strength‐Ductility Synergy in LPBF‐Processed Ti‐Mo‐Ni Alloy
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Microstructural refinement is a common strategy for strengthening additively manufactured titanium alloys because it promotes phase nucleation. Reducing the α/β interfacial formation energy is an effective way to increase the nucleation rate.
An Li +6 more
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Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Lithium–sulfur (Li–S) batteries are promising for next‐generation high‐energy‐storage systems but are hindered by polysulfide shuttle, sluggish kinetics, and volume expansion. Conventional carbon hosts struggle to simultaneously anchor and convert polysulfides efficiently.
Ling Chen, Peng Xu, Jiaojing Shao
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT The construction of core–shell grains can enhance the coercivity of Nd2Fe14B magnets. However, it is a significant challenge to elucidate the formation of these core–shell grains particularly regarding the spontaneous core–shell structure in Y‐substituted Nd2Fe14B alloys.
Sining Fan +13 more
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Recovering Critical Elements From Wastewater for Battery Materials: A Review
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Driven by global carbon neutrality goals, the transition toward a circular economy and sustainable resource management has become increasingly imperative. Given the indispensable role of battery technologies in modern energy storage systems, strategic elements such as lithium (Li), cobalt (Co), and nickel (Ni)—identified by the European ...
Ting Lei +5 more
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT In conventional photoconductive detectors, the shared collection path for dark current and photocurrent imposes a fundamental compromise between noise suppression and signal responsivity. To break this trade‐off, we introduce a device architecture featuring a strategically integrated third electrode within a MAPbI3/Nb2CTx heterostructure. This
Yan‐Wei Lv +7 more
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