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Localizing vitamin-c through nanoconfinement enables high-rate cO_(2) electrolysis to ethylene

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Science china Materials 2024年第3期67卷 1006-1008页

作者： Zhengyi qian Shaojun Guo School of Materials Science and engineering Peking UniversityBeijing 100871China

The electrosynthesis of value-added fuels and chemicals from carbon dioxide reduction reaction(cO_(2)RR)is a promising approach for realizing the objectives of carbon neutrality[1].Nevertheless,the current production of desirable multicarbon(c_(2+))chemicals,such as ethylene(c_(2)H_(4)),still encounters challenges related to low selectivity,low current density,and the requirement for high-purity feeding gas[2].

关键词： enable purity dioxide

Unveiling a half-century mystery of molecular bases for three-line hybrid rice breeding system

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Journal of Integrative Plant Biology 2024年第1期66卷 3-6页

作者： Xiaoming Zheng qian qian State Key Laboratory of crop Gene Resources and Breeding Chinese Academy of Agricultural SciencesBeijing 100081China Yazhouwan National Laboratory No.8 Huanjin RoadYazhou DistrictSanya 572024China

Rice(Oryza sativa L.)isa staplecropforhalf theworld's Ipopulation and an important contributor to world food *** discovery and application of cytoplasmic male sterility(cMS)and fertility restoration(Rf)genetic materials have allowed the production of three-line hybrid rice(Kim and Zhang,2018),successfully harnessing heterosis in *** major cMS and/or Rf systems are commonly used to produce three-line hybrid rice:Wild Abortive(cMS-WA),Boroll(cMS-BT),and Honglian(cMS-HL).Among these,the cMS-WA system is the most widely employed(Sattari et al.,2007;chen and Liu,2014;Huang et al.,2014).Several Rf genes from different cMS systems have been cloned in rice,including Rf4 for cMS-WA(Tang et al.,2014),Rf1a and Rf1b for cMS-BT(Wang et al.,2006),Rf5,and Rf6 for cMS-HL(Huet al.,2012;Huang et al.,2015),and Rf19for cMS-FA(Jiang et al.,2022).A molecular mechanism and evolutionary model for the cMS-WA gene WA352c have also been reported(Luo et al.,2013;Tang et al.,2017).

关键词： breeding fertility Wild

The homogenous growth of co-based coordination compound on graphene nanosheet for high-performance K-organic battery and its reaction mechanism

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Rare Metals 2024年第4期43卷 1622-1634页

作者： qian-qian Peng Yi-Ting Wang Shuo Qi Yao Xiao Yong Wang Shuang-qiang chen School of Environmental and chemical engineering Shanghai UniversityShanghai200444China School of chemistry and Materials engineering Wenzhou UniversityWenzhou325035China

Metal coordination compounds(Mccs)are gaining popularity for potassium-ion batteries(PIBs)owing to their tuneable structure,multiple reaction sites,low cost and unique ***,they are generally subjected to intrinsic features of the sluggish ionic diffusion coefficient,low electronic conductivity and slow ***,a new Mcc material of cobalt-1,3,5-trioxy-2,4,6-triamino-benzo(co-TB)coordination compound was synthesized and homogenously grown on the surface of graphene nanosheets(GNS),forming a co-TB@GNS composite with enhanced electronic conductivity and flexible *** from the overall enhanced conductivity,high surface area and abundant activated K-storage sites,co-TB@GNS electrodes have exhibited superior cycling performance with high reversible capacities(312 mAh·g^(-1)after 100 cycles at 100 mA·g^(-1),224 mAh·g^(-1)after 500 cycles at 1 A·g^(-1))and better rate performances compared with the pure co-TB compound when served as PIB's ***,multiple in-situ measurement techniques have jointly confirmed that the organic functional groups(c=O,c=N and c=c of benzene rings)and co^(2+)in co-TB are the main reversible K-storage sites,including in-situ Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD),and partial capacity contribution is originated from GNS by the apparent K-storage behavior in the in-situ XRD pattern,proving the possibility of K-storage for metal-organic materials.

关键词： Metal coordination compounds Potassiumion battery cobalt coordination compound K-storage mechanism

Potential role of the protein interactome in translating TcM theory and clinical practice into modern biomedical knowledge

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chinese Journal of Natural Medicines 2024年第5期22卷 385-386页

作者： cHEN qian FAN Xiaohui Pharmaceutical Informatics Institute College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China National Key Laboratory of chinese Medicine Modernization Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100China

With the awarding of the 2015 Nobel Prize in Physiology or Medicine to chinese pharmacologist Tu Youyou,and the significant contributions of traditional chinese medicine(TcM)for coronavirus disease 2019(cOVID-19),TcM has garnered increasing attention and interest *** advanced research progress has been made in the efficacy research,mechanism elucidation and target prediction of TcM in recent years[1].

关键词： Protein interactome Traditional chinese medicine Therapeutic effectiveness

Selective N-Methylation of N-Methylaniline with cO_(2) and H_(2) over cu/In_(2)O_(3) catalyst

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chinese Journal of chemistry 2024年第3期42卷 276-282页

作者： Huan Zheng Bo qian Lin He State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouGansu730000 China University of chinese Academy of Sciences Beijing100049 China

N-Methylation of amines with cO_(2) and H2 is a potential approach for cO_(2) utilization because N-methylated amines can be used as solvents and organic intermediates. In_(2)O_(3)-supported cu (cu/In_(2)O_(3)) acts as an effective heterogeneous catalyst for N-methylation reaction of N-methylaniline (MA) with cO_(2) and H_(2),showing higher N,N-dimethylaniline (DMA) selectivity than other supported cu catalysts. On one hand,the dispersion of cu can be improved by the defective In_(2)O_(3) support. On the other hand,In_(2)O_(3) support is active in the dissociative adsorption of cO_(2) through c—O bond breaking. In addition,the H_(2) dissociation ability of In_(2)O_(3) can also be enhanced by cu. The combination of cu and In_(2)O_(3) is effective in the activation of cO_(2),the adsorption of intermediate N-methylformanilide (MFA),the hydrogenation of MFA to DMA and the prohibition of c—N bond cleavage side reactions,thereby enhancing the reaction rate of MA conversion and the selectivity to DMA.

关键词： N-Methylation cO_(2) cu/In_(2)O_(3) Supported catalysts Heterogeneous catalysis

Direct conversion of Methane to Propylene

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Research 2024年第2期2023卷 463-472页

作者： Yunpeng Hou Yuxiang Lan chao qian Shaodong Zhou college of chemical and Biological engineering Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture TechnologyZhejiang University310027 HangzhouP.R.China Zhejiang Provincial Innovation center of Advanced chemicals Technology Institute of Zhejiang University-Quzhou324000 QuzhouP.R.China

Nonoxidative coupling of methane exhibits promising prospect in that it affords value-added hydrocarbons and hydrogen with high atom ***,challenge remains in direct,selective conversion of methane to more valuable hydrocarbons like *** current work presents a catalyst with well-dispersed Ta atoms anchored by graphitic c_(3)N_(4)-supported *** a catalyst is able to convert methane selectively to ethylene and propylene at a relatively low temperature(350℃).The conception of the active center and construction of the catalyst have been described,and the origins of the catalytic performance are discussed.

关键词： methane catalyst hydrocarbons

Rice AGL1 determines grain size and sterile lemma identity

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The crop Journal 2024年第2期12卷 630-634页

作者： Haiping Yu An Wang Guangheng Zhang Guojun Dong Longbiao Guo qian qian Deyong Ren State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006ZhejiangChina Hainan Yazhou Bay Seed Laboratory Sanya 572024HainanChina National Nanfan Research Institute(Sanya) Chinese Academy of Agricultural SciencesSanya 572024HainanChina

The grass spikelet is a unique inflorescence structure that determines grain *** many genetic factors have been well characterized for grain size and glume development,the underlying molecular mechanisms in rice are far from ***,we isolated rice gene,AGL1 that controlled grain size and determines the fate of the sterile *** of function of AGL1 produced larger grains and reduced the size of the sterile *** grains in the agl1 mutant were caused by a larger number of cells that were longer and wider than in the wild *** sterile lemma in the mutant spikelet was converted to a rudimentary glume-like *** findings showed that the AGL1(also named LAX1)protein positively regulated G1 expression,and negatively regulated NSG1 expression,thereby affecting the fate of the sterile *** together,our results revealed that AGL1 played a key role in negative regulation of grain size by controlling cell proliferation and expansion,and supported the opinion that rudimentary glume and sterile lemma in rice are homologous organs.

关键词： Abnormal grain and sterile lemma 1 Oryza sativa Grain size Rudimentary glume

combined effect of WS_(2) and Ti_(3)c_(2)T_(x) MXene favors oil-based ultra-low friction on rough steel-steel interface at elevated temperatures

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Science china(Technological Sciences) 2024年第7期67卷 1991-2002页

作者： LIU YangQin cHEN Lei WANG Yang qian LinMao Tribology Research Institute State Key Laboratory of Rail Transit Vehicle SystemSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China Key Laboratory of Advanced Technologies of Materials(Ministry of Education) Research Institute of Frontier ScienceSouthwest Jiaotong UniversityChengdu 610031China

The lubrication performance of liquids is severely restricted and is degraded in high-temperature environments. Stable and reliable lubrication in high temperature environments has been a long-standing goal in various industrial fields. In this study,WS_(2)and Ti_(3)c_(2)T_(x)MXene nanoflakes were used as oil-based lubricant additives to generate ultra-low friction and even superlubricity(friction coefficient of ~0.007) at elevated temperatures(400℃), which has hitherto not been achieved by both individual pristine materials, WS_(2)and Ti_(3)c_(2)T_(x)MXene. Viscosity and thermogravimetric characterization revealed improvements in the high-temperature rheological properties and thermal stability of the lubricating base oil, indicating improved loadbearing and continuous lubrication capabilities at elevated temperatures. X-ray photoelectron spectroscopy, transmission electron microscopy, and atomic force microscopy demonstrated that the formation of an iron/titanium/tungsten-rich oxide lubricious thin film at the sliding interface reduced the interfacial shear stress, which was responsible for the observed friction and wear reductions at high contact pressures(> 1.1 GPa). Although the titanium/tungsten oxide film was gradually removed after prolonged sliding, a sufficiently thick iron oxide film maintained a low friction coefficient for at least 2 h. The improved surface quality facilitates the achievement of ultra-low friction and reduced wear. The proposed lubrication methodology has a broad utilization potential as a wear-reduction strategy across various industrial fields at elevated temperatures.

关键词： ultra-low friction high-temperature wear reduction lubricating additive tungsten disulfide MXene

Preparation of Kω-g-c_(3)N_(4) composite loaded on magnetic attapulgite and its degradation performance for malachite green

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chinese Journal of chemical engineering 2024年第7期71卷 110-121页

作者： Aishun Ma Hanlin qian Hongxia Liu Sili Ren Jiangxi Key Laboratory of Mining&Metallurgy Environmental Pollution control Jiangxi University of Science and TechnologyGanzhou 341000China Jiangxi Provincial Key Laboratory of Low-carbon Processing and Utilization of Strategic Metal Mineral Resources Jiangxi University of Science and TechnologyGanzhou 341000China

Visible-light-driven photocatalysis is a promising technology for the treatment of dye *** this work,a novel photocatalyst of Kω-g-c_(3)N_(4) loaded on magnetic attapulgite(ATP)(K-g-c_(3)N_(4)@ATP-Fe_(3)O_(4))with excellent visible light photocatalytic properties and stability were successfully prepared and *** removal efficiency of K-g-c_(3)N_(4)@ATP-Fe_(3)O_(4) for malachite green(MG)was studied,and the degradation mechanism was analyzed and *** was found that the K_(5)-g-c_(3)N_(4)@ATP-Fe_(3)O_(4) photocatalyst possessed excellent degradation efficiency of over 98.0%for the MG dye wastewater under optimal ***,the K_(5)-g-c_(3)N_(4)@ATP-Fe_(3)O_(4) materials possessed good recyclability with a removal rate over 82%after 4 *** visible light condition,the K_(5)-g-c_(3)N_(4)@ATP-Fe_(3)O_(4) photocatalyst produce radicals of·OH and O_(2)^(-)to degrade the MG dyes,which was supported by electron paramagnetic resonance(EPR)and radical trapping *** addition,the Lc-MS analysis interpreted the degradation pathways and intermediates of MG in the *** findings in this work indicate that the prepared photocatalytic material has excellent degradation efficiency for MG and can be applied in dye wastewater treatment.

关键词： Photocatalyst Malachite green Kω-g-c_(3)N_(4) Degradation