Results 31 to 40 of about 1,073,755 (169)

不均匀电场SF6/N2混合气体击穿特性的实验研究

open access: yesGaoya dianqi, 2016
文中对SF6/N2混合气体在不均匀场下的击穿特性展开研究,通过测量棒—板电极在不同电极间距、混合比、压强下的正、负极性击穿电压值,分析电场不均匀度及气体压强对SF6/N2混合气体极性效应的影响。研究结果表明:在0.1 MPa时,击穿电压随着电极间距的增大而增大,N2负极性的击穿电压高于正极性的击穿电压,在电极间距为12 mm时,负极性击穿电压是正极性击穿电压的1.71倍,而SF6气体与N2极性效应相反,表现为正极性的击穿电压略高于负极性的击穿电压;电极间距为4 mm时,随气体压强的升高负极性击穿电压增大,
陈会利   +4 more
doaj  

Engineering a Tumor‐Targeted MgH2@Lip/PD‐L1 Nanoplatform for Synergistic Hydrogen Therapy and Immune Activation

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Lung cancer remains the leading cause of cancer‐related deaths worldwide, yet immune checkpoint blockade (ICB) is often compromised by an immunosuppressive tumor microenvironment (TME) with acidosis, hypoxia, and poor T cell infiltration. Here, we develop a TME‐responsive nanoplatform (MgH2@Lip/PD‐L1) that couples hydrogen gas therapy with PD ...
Xuyu Gu   +5 more
wiley   +1 more source

铂钌活性涂层电极

open access: yes, 1987
铂钌活性涂层电极用于水电解装置中,实现降低槽电压节省能耗.本发明给出的涂层阳极由PtO2、PtO、KCL和Ru组成;阴极由Pt和Ru组成.与已知活性涂层电极相比,本发明的突出优点是电极制备方法简单,将含Pt和Ru的活性组分加到正在运转的电解槽中,在电解过程中便可在电极上形成活性涂层,使单对槽电压下降0.22伏,节电10%.此外这种电极的寿命长,因而这种方法极易在工业水电解装置中应用 ...
张振武, 何桂森
core  

Plasma‐Boosted Bi2Mn4O10 Electrocatalysis Enables Real‐Time On‐Board Monitoring of CO2 in Exhaust

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Real‐time monitoring of CO2 concentration in automobile exhaust is critical for effective carbon emission reduction. However, the inherently inert nature of CO2 poses a significant challenge for achieving accurate and efficient detection in the exhaust automobile environment.
Aining Jiang   +6 more
wiley   +1 more source

具有抗肿瘤活性的低极性人参皂苷组合物

open access: yes, 2005
本发明涉及具有抗肿瘤活性的低极性人参皂苷组合物,根据制备方法及其活性特点,将低极性人参皂甙分为七组,本发明特别是涉及二醇I组与其余六组低极性人参皂甙中任何一组或多组低极性人参皂甙的混合物。所述的组合物充分发挥各种低极性人参皂甙的特点,使抗癌活性显著增强,组合物具有诱导肿瘤细胞分化、诱导肿瘤细胞凋亡、抑制肿瘤生长、逆转肿瘤多药耐药性、抑制肿瘤新生血管生成、抑制肿瘤的浸润和转移、增强机体免疫力和降低化疗药物毒副作用等抗肿瘤活性,极具开发潜力 ...
杨凌, 何克江
core  

Redox Reaction and Dissolution Analysis for Hollow C Nanospheres Comprising N‐Doped C Framework With Abundant Ni–Co Heteronuclear Catalysts for Highly Durable K‒Te Batteries

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Tellurium (Te), emerging as a promising alternative to sulfur (S) and selenium (Se), offers significant advantages for potassium (K) ion storage due to its comparable theoretical volumetric capacity (2619 mAh cm−3) and higher electronic conductivity (∼102 S m−1), which promotes rapid charge transfer and improves reaction kinetics.
Sung Woo Cho   +7 more
wiley   +1 more source

晶格匹配型GaAs/Al_xGa_(1-x)As量子阱电极光电转换性能的研究

open access: yes, 1997
研究了晶格匹配型GaAs/Al_xGa_(1-x)As量子阱电极在非水溶液中的光电转换性能,以及电极结构参数(如阱宽、外垒厚度,量子阱周期)对其光电转换性能的影响 ...
阎春辉   +5 more
core  

药理学考试模拟题

open access: yesHuli yanjiu, 1989
一、名词解释副作用、继发反应、选择作用、药效动力学、药代动力学、第一关卡效应、半衰期、药酶、亲和力、内在活性、受体兴奋剂、受体阻断剂、兴奋、抑制、毒性反应、坪值、极量、安全范围,治疗指数、常用量、生物可用度、变态反应、耐药性、耐受性、药理学、药物、药酶诱导、药酶抑制、毒药、麻醉药品、二重感染、习惯性、成瘾性、被动转运、全效量、内在拟交感活性、M样作用、β型作用、维持量、反跳现象、免疫增强剂 ...
郭美
doaj  

极性反转条件下XLPE空间电荷与电场分布特性研究

open access: yesGaoya dianqi
基于电网换相换流器的高压直流(LCC-HVDC)输电系统中的交联聚乙烯(XLPE)电缆绝缘在实际工况下不仅长期承受内高外低的温度梯度作用,还要面临潮流反转调整,承受极性反转电场,严重影响着XLPE绝缘性能。为此,基于双极性电荷输运模型仿真研究了温度梯度和极性反转条件对XLPE中空间电荷动态特性及电场畸变的影响。结果表明:温度梯度增大,高温侧附近同极性电荷增多,这部分残留电荷在电压反转后表现为异极性电荷,增强了此处场强;常温下电压极性反转越快,残留电荷越多,反转后最大电场越高,而温度梯度下极性反转越快 ...
鲍国栋   +4 more
doaj  

胶红酵母催化苯乙酮的不对称还原吸附树脂的促进作用

open access: yes四川大学学报. 自然科学版, 2009
以苯乙酮为模式底物,利用筛选的胶红酵母(Rhodotorula mucilaginosa)YS6-2为手性催化剂,不对称还原合成具有光学活性的1-苯基乙醇.结果表明:反应的立体选择性极高,合成的产物以(S)-型为主,其对映体过量值达99.0%.在设立的水相系统中,酵母细胞在发酵培养36 h、转化反应36 h、pH 6.6、温度34℃、2%葡萄糖作为辅助底物的优化条件下,0.12g/mL菌体(湿重)催化还原70 mmol/L苯乙酮的转化率达49.1%.同时,向反应体系中添加1 g D-101吸附树脂 ...
朱冬眉   +5 more
doaj  

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