排序方式: 共有13条查询结果,搜索用时 13 毫秒
1.
Yanan Zhao Cong Yinqi Zhu Xiaoyu Liu Wenying Liu Yang Wang Dongyin 《Russian Journal of Electrochemistry》2020,56(12):1031-1036
Russian Journal of Electrochemistry - In this study, we focus on the effect of solid-solution treatment on the susceptibility to intergranular corrosion and electrochemical corrosion of 304... 相似文献
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助剂对镍基催化剂催化裂解生物质气化焦油性能的影响 总被引:6,自引:0,他引:6
采用等体积浸渍法制备了不同助剂 (Fe, Mg, Mn 和 Ce) 修饰的镍-凹凸棒石粘土基催化剂 (Ni/PG), 并用于催化裂解生物质气化焦油反应. 采用 X 射线衍射和透射电子显微镜对 Ni/PG 催化剂进行了表征, 并用总碳分析仪测定了催化剂上的积炭. 结果表明, 助剂的种类及其含量对催化剂性能的影响显著, 在所选用的助剂中, Fe 助剂入最有利于提高 Ni/PG 催化剂上焦油的去除率和 H2 的收率, 且随助剂 Fe 含量的增加, 催化剂活性逐渐提高. 相似文献
3.
Ziquan Zhao Yan Sun Lilin Wang Xuan Chen Yanpei Sun Long Lin Yulin Tang Fei Li Dongyin Chen 《Tetrahedron letters》2019,60(11):800-804
Organic base DBN has been identified as an efficient reagent for promoting the dehydrogenative/decarboxylative aromatization of tetrahydro-β-carbolines under air atmosphere, to access the corresponding β-carbolines in moderate to good yields. The utility of this protocol for the gram-scale synthesis of β-carboline alkaloids eudistomin U (7) and harmane (10) has also been demonstrated. 相似文献
4.
Liu Z Gu C Chen F Yang D Wu K Chen S Jiang J Zhang Z 《Applied biochemistry and biotechnology》2012,166(3):722-734
Phytochelatin synthase (PCS) is a key enzyme involved in the synthesis of phytochelatins, which are thought to play important
roles in heavy metal detoxification. The sacred lotus (Nelumbo nucifera), one of the most popular ornamental species, has been shown to be a potential phytoremediator of heavy metal polluted water.
However, the phytochelatin synthase gene in N. nucifera has not been identified yet. Here, we report the isolation and function characterization of a N. nucifera homologue of phytochelatin synthase. The sequence obtained shares a high degree of similarity with PCSs from other plant
species and was named as Nelumbo nucifera phytochelatin synthase1 (NnPCS1). By using quantitative RT-PCR, we found that the expression of NnPCS1 in leaves of N. nucifera was dramatically increased in response to Cadmium (Cd) treatment. We further showed that, when exposed to Cd stress, Arabidopsis transgenic plants heterologous expressing NnPCS1 accumulated more Cd when compared with wild type. These results suggest that NnPCS1 involved in the response of N. nucifera to Cd stress and may represent a useful target gene for the phytoremediation of Cd-polluted water. 相似文献
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Haibo Liu Tianhu Chen Dongyin Chang Dong Chen Chengsong Qing Jingjing Xie Ray L. Frost 《Journal of Thermal Analysis and Calorimetry》2013,111(1):409-415
Sedimentary palygorskite (SP) and hydrothermal palygorskite (HP) were characterized by XRF, TG/DSC, and XRD. The total iron and dissociative iron in palygorskite were detected using spectrophotometry. The results showed that about 3.57 wt% of Fe2O3 was detected in SP in contrast with 0.4 wt% in HP. SP was a Fe-substituted palygorskite, and HP was an Al-rich palygorskite. The occurrence of Fe substitution in SP resulted in two mass loss steps of coordinated water and resulted in a larger d spacing. The SP showed greater thermal stability than the HP. It was proposed the change of (200) diffraction peak and (240) diffraction peak reflect changes of tetrahedral and octahedral structures in palygorskite. 相似文献
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H Liu T Chen RL Frost D Chang C Qing Q Xie 《Journal of colloid and interface science》2012,384(1):81-86
Highly ordered submicron spherical Fe-MCM-48 was successfully synthesized by a mixed surfactant method using cheap water glass as silica source. The gyroid like structure of MCM-48 was captured by a TEM image for the first time, and it was corresponded well to the previous simulated gyroid model. A tentative mechanism of homogenization cooperative process involving the Helmholtz double electrical layer was purposed. After the loading of metal Ag, the resulting Ag/Fe-MCM-48 catalyst showed good catalytic performance in the catalytic combustion of benzene. 相似文献
9.
An efficient and metal-free Di-tert-butyl peroxide (DTBP)-promoted dual oxidative amination annulation of 2-amino arylsulfonamide with methylarene has been developed. This protocol provides straightforward access to benzothiadiazine 1,1-dioxide derivatives without using prefunctionalized substrates in good to excellent yields with good functional group tolerance. 相似文献
10.
为防止大北天然气集输过程中管道结蜡,针对大北天然气处理厂天然气和石蜡的性质,以丙烯酸高碳醇酯(丙烯酸十二酯、丙烯酸十八酯)、顺丁烯二酸酐(MA)和4-烯丙基苯甲醚(AA)为原料合成了两种防蜡剂EMAAA-12和EMAAA-18;通过全温域模拟相图、析蜡曲线和FBRM粒径分布分析了防蜡剂对天然气物性的影响。结果表明:添加防蜡剂后的析蜡曲线向低温区偏移,防蜡剂可显著降低天然气的析蜡点温度。随着温度降低,大弦长粒子的数量整体增加,而粒径分布无明显突变。防蜡剂自身超支化结构有益于与石蜡相互作用形成共晶,抑制石蜡晶体的长大和自身聚结,从而达到防蜡的效果。 相似文献