Results 41 to 50 of about 11,676 (213)
Zhongshan Daxue xuebao. Yixue kexue ban, 2008 【目的】探讨铜体外抗低钾诱导大鼠小脑颗粒神经元（CGNs）凋亡作用及其机制。【方法】体外培养乳鼠的CGNs并用去极化诱导凋亡模型；噻唑兰（MTT）法检测细胞存活率；相差显微镜及Hoechst 33258染色分别观察细胞及其核形态学变化；流式细胞仪（FCM）检测亚二倍体峰。【结果】1~40 μmol/L的铜可抗低钾所致的大鼠CGNs凋亡，明显提高CGNs的存活率。铜（20 μmol/L）显著减少低钾所致的大鼠CGNs胞体皱缩、细胞核固缩和亚二倍体峰等凋亡特征。铜的神经保护作用可以持续72 h以上 ...
蓝秀健 +5 more
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Zhejiang Daxue xuebao. Lixue ban, 2014 采用浸渍法制备了 Cu-ZSM-5、Cu-beta、Cu-USY和Cu-SAPO-34四种铜改性分子筛催化剂，并评价了各个催化剂的NH3选择性催化还原(NH3-SCR)性能，同时通过X射线衍射(XRD)、H2程序升温还原(H2-TPR)、CO 吸附红外(CO-DRIFTS)、原位红外(In-situ FTIR)等实验技术研究了不同Cu-zeolite催化剂的物理化学性质及其对NH3-SCR性能的影响.结果表明，Cu-ZSM-5和Cu-beta在150 ℃时NO转化率可达到80%左右，表现出优异的低温活性，
YANGHaipeng(杨海鹏) +2 more
doaj +1 more source
Regulation &Governance, Volume 19, Issue 2, Page 349-369, April 2025.Abstract China is simultaneously enacting a state‐led financialization of governance and a prioritization of environmental objectives. Resultingly, dedicated state‐backed green funds have grown in scale beyond US$70 billion. Drawing on interviews, policies, and financial databases, we examine these funds through policy document analysis, descriptive ...
Kasper Ingeman Beck, Mathias Larsen
wiley +1 more source
, 2010 将在40℃条件下培养5d和10d的铜绿微囊藻(Microcystis aeruginosa FACHB905)转接至新鲜培养基,以25℃培养条件下转接的相同细胞密度的培养物为对照,然后均置于相同的培养条件下恢复生长.研究了各培养物的生长、叶绿素a浓度、光系统Ⅱ的光化学效率(Fv/Fm)、净光合速率和呼吸速率的变化.结果表明,在40℃高温下分别培养5d和10d,铜绿微囊藻的比生长速率、Fv/Fm等指标均受到显著抑制 ...
李敦海, 秦红杰
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成年人发样中镁、铝、锌、铁、铜和锰元素水平检测及其与腹型肥胖的相关性分析
Zhongguo shiyan zhenduanxue, 2017 目的了解成年人发样中镁、铝、锌、铁、铜和锰元素水平,探讨各元素含量与腹型肥胖的相关性。方法采用随机整群抽样的方法,以问卷调查、体格检查和实验室检测（ICP-MS测定发样中镁、铝、锌、铁、铜和锰元素水平）相结合的方式,收集吉林省靖宇、东辽和长岭县657名成年人的有效数据。结果不同性别成年人发样中镁、铝、锌、铁和锰元素含量比较差异有统计学意义 ...
李卓 +5 more
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Veterinary Dermatology, Volume 36, Issue 2, Page 148-158, April 2025.Background – Biofilm production by canine otitis externa (COE) pathogens and resistance development to multiple antimicrobials are commonly reported problems in veterinary practice. The use of adjuvants to disrupt biofilms may be a viable adjunctive therapy.
Bhumika F. Savaliya +3 more
wiley +1 more source
Research on Energy Efficiency Optimization Algorithm for Copper Flash Smelting Process Based on Data-driven [PDF]
, 2016 铜闪速熔炼工序具有多变量、非线性、大时滞、强耦合、生产波动大的特点，传统的基于机理模型的优化控制系统很难适应多变的运行条件，预测结果偏差较大，影响最终的控制效果。随着计算机技术的发展，复杂工业过程中积累了大量生产数据，为我们从人工智能的角度进行建模与优化控制提供了数据基础。 本论文以某大型闪速炼铜企业的闪速熔炼生产过程为研究对象。为了实现铜闪速熔炼工序中的节能减耗，本文提出了一种满足三大工艺指标（冰铜品位，冰铜温度，渣中铁硅比）约束的能效优化模型：首先 ...
董云成
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Diversidade e EducaçãoO artigo tem como objetivo fornecer subsídios legais para os/as educadores/as enfrentarem os desafios impostos por um contexto sociopolítico reacionário, promovendo práticas pedagógicas que valorizem a diversidade, os direitos humanos e a igualdade de gênero na escola.
Gabriela Bieger Reyes +2 more
openaire +1 more source
Discrete Dynamics in Nature and Society, Volume 2025, Issue 1, 2025.This paper discusses the impact of trade policy uncertainty (TPU) on innovative behavior in export‐oriented enterprises using data of nonfinancial Chinese A‐share listed companies from 2007 to 2021. TPU index is constructed using a tariff measurement method and a text mining method after China’s accession to the WTO.
Pei Xu +3 more
wiley +1 more source
Study on Alleviation Mechanism of Hydrogen Sulfide on Copper Stress in Rice Seedlings [PDF]
, 2015 硫化氢（hydrogensulfide,H2S）是继一氧化氮（nitricoxide,NO）、一氧化碳和(carbonmonooxide,CO)之后被广泛关注的气体信号分子，低浓度的H2S在动物、植物和微生物中被证实参与了众多生理生化过程，调节了有机体的生长发育。H2S在植物应对盐害、干旱、重金属胁迫、冷热胁迫中发挥重要作用，增强植物对逆境的抵抗力。 铜污染是环境污染中不容忽视的一类重金属污染。本文中，我们以水稻（Oryzasativa）为材料，研究了H2S对铜胁迫的影响。结果显示低浓度的H2S ...
尹珊珊
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