摘要：With the continuous improvement of solar energy production capacity,how to effectively use the electricity generated by renewable solar energy for electrochemical conversion of biomass is a hot *** conversion of 5-hydroxymethylfurfural(HMF)to biofuels and value-added oxygenated commodity chemicals provides a promising and alternative pathway to convert re-newable electricity into *** nickel-based eletrocatalysts are well-known for HMF oxidation,their relatively low intrinsic activity,poor conductivity and stability still limit the poten-tial ***,we report the fabrication of a freestanding nickel-based electrode,in which Ni(OH)2 species were in-situ constructed on Ni foam(NF)support using a facile ac-id-corrosion-induced *** Ni(OH)2/NF electrocatalyst exhibits stable and efficient electro-chemical HMF oxidation into 2,5-furandicarboxylic acid(FDCA)with HMF conversion close to 100%with high Faraday ***-situ formation strategy results in a compact interface between Ni(OH)2 and NF,which contributes to good conductivity and stability during electrochemical *** superior performance benefits from dynamic cyclic evolution of Ni(OH)2 to NiOOH,which acts as the reactive species for HMF oxidation to FDCA.A scaled-up device based on a continu-ous-flow electrolytic cell was also established,giving stable operation with a high FDCA production rate of 27 mg h^(-1)cm^(−2).This job offers a straightforward,economical,and scalable design strategy to design efficient and durable catalysts for electrochemical conversion of valuable chemicals.

摘要：广东省是精细化工的集中区域,熟悉精细化工工程设计的要点,有利于提高广东省精细化工生产的整体水平,为建设绿色、安全、智能化的精细化工工厂打好基础。本文将精细化工工程设计分为方案设计和施工图设计两个阶段,重点分析了方案设计阶段的设计要点。

摘要：目的探讨长链非编码RNA(LncRNA)LOC101927476在卵巢癌细胞中的表达及其对卵巢癌生物学特征的影响。方法选取2018—2019年于中国医学科学院肿瘤医院手术治疗的卵巢癌患者。采用实时荧光定量PCR(real-time PCR)检测卵巢癌细胞系3AO、OVCA429、TOV21G、A2780、SKOV3以及22例卵巢癌原发瘤和转移瘤组织中LncRNA LOC101927476的表达水平,采用TCGA数据库中卵巢癌转录组测序数据验证LncRNA LOC101927476和GATA4的表达,采用慢病毒包装体系构建过表达LOC101927476(OE-LOC101927476组)和空载(OE-EV组)慢病毒并转染至3AO细胞。设计单链向导RNA(sgRNA),利用CRISPR/Cas9构建LncRNA LOC101927476敲除细胞系。采用Transwell法和划痕实验检测LncRNA LOC101927476对卵巢癌细胞侵袭和转移能力的影响。采用细胞计数盒8(CCK-8)法检测细胞的增殖能力。结果real-time PCR显示,22例卵巢癌患者中,20例转移灶中LncRNA LOC101927476的表达水平低于原发灶。Transwell迁移实验显示,OE-EV组3AO细胞的穿膜细胞数为(1024±76)个,高于OE-LOC101927476组[(699±65)个,P=0.003];sg-Control组OVCA429细胞的穿膜细胞数为(363±27)个,低于sg-LOC101927476组[(472±40)个],差异有统计学意义(P=0.011)。Transwell侵袭实验显示,OE-EV组3AO细胞的穿膜细胞数为(661±95)个,高于OE-LOC101927476组[(357±63)个],差异有统计学意义(P=0.006);sg-Control组OVCA429细胞的穿膜细胞数为(309±13)个,低于sg-LOC101927476组[(512±72)个],差异有统计学意义(P=0.005)。划痕实验显示,培养48 h时,OE-LOC101927476组3AO细胞的划痕愈合比例为(10.86±0.63)%,低于OE-EV组[(57.38±4.42)%],差异有统计学意义(P=0.009);培养24 h时,sg-LOC101927476组OVCA429细胞的划痕愈合比例为(59.98±1.34)%,高于sg-Control组[(23.15±2.03)%],差异有统计学意义(P=0.004)。CCK-8结果显示,OE-LOC101927476组3AO细胞的增殖能力明显减弱,在过表达LncRNA LOC101927476后第4天时,OE-LOC101927476组3AO细胞的吸光度(A)值为2.07±0.08,与OE-EV组(2.29±0.04)比较,差异有统计学意义(P=0.009)。sg-LOC101927476组OVCA429细胞的增殖能力提高,在敲降LncRNA LOC101927476的表达后第4天时,sg-LOC101927476组OVCA429细胞的A值为(2.13±0.03),与sg-Control组(1.93±0.03)比较,差异有统计学意义(P=0.001)。OE-LOC101927476组3AO细胞中GATA4的相对表达水平为1.86±0.25,与OE-EV组(1.00±0.00)比较,差异有统计学意义(P=0.001)。在LncRNA LOC101927476高表达的患者中,GATA4的表达水平为(2.93±0.35),高于LncRNA LOC101927476低表达的患者(0.29±0.06),差异有统计学意义(P=0.001)。结论LncRNA LOC101927476能够抑制卵巢癌的侵袭、迁移和增殖。