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Strategies for improving extraction capacity through preorganization structure:A novel 5,6-bicyclicmalonamide extractant(THPPD)

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Journal of Rare Earths 2024年第4期42卷 768-774页

作者： miaomiao Zhang Zhen Yang Yuhua Cui Jianhui Su Heng Zhao Chengjin xu Xiaolei Liu Guoxin Sun Xiujing Peng Yu Cui School of Chemistry and Chemical Engineering University of JinanJinan250022China Institute for Smart Materials&Engineering University of JinanJinan250022China Shandong Institute for Food and Drug Control Jinan250101China

Rational design of extractant structure to improve the extraction and separation capacity of rare earth elements(REEs)is a long-standing challenge.Herein,a new strategy was proposed to improve the stability of the chelating structure formed by malonamide and REEs.The stability of the chelating structure is greatly improved by using a double-ring framework structure which makes the two carbonyl groups of malonamide unable to rotate freely and both of them point to the metal ion position.Three benzyl groups were used to construct the hydrophobicity of the extractant and the organic shell of the extracted species.Tribenzylhexahydro-pyrrolo-pyridine-dione(THPPD)was designed and synthesized.The structure reduces the energy consumed by rotating carbonyl group in the coordination with metal ions and then improves the extraction ability of extractant.The crystal structure was preorganized as expected,with the two carbonyls pointing in a favorable coordination direction to the structural complement of the metal ion.The extraction behaviors of REEs with THPPD in a nitric acid medium were studied.Compared with N,N’-dibenzyl-N,N’-dimethylmalonamide(DBDM-MA)with a chain structure,the extraction capacity of THPPD is 360 times higher than that of DBDM-MA at 5.0 mol/L sodium nitrate.Furthermore,the binding energy and Gibbs free energy were investigated by density functional theory(DFT)in conjunction with the B3LYP.The theoretical results show that THPPD has more effective interaction with Pr(NO_(3))3 than DBDM-MA.The construction of chelating groups conformation is a worthy direction to improve the coordination ability and even selectivity of extractant.

关键词： Rare earth elements Extraction separation 5,6-bicyclicdiamide extractant

Facile preparation and efficient MnxCoy porous nanosheets for the sustainable catalytic process of soot

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Green Energy & Environment 2024年第3期9卷 516-528页

作者： miaomiao Hu Kun Zhou Tingyi Zhao Zheng Li Xianhai Zeng Di Yu xuehua Yu Mingqin Zhao Zhihui Shao Qixiang xu Bing Cui Flavors and Fragrance Engineering&Technology Research Center of Henan Province College of Tobacco ScienceHenan Agricultural UniversityZhengzhou450002China School of Ecology and Environment Zhengzhou UniversityZhengzhou450001China College of Energy Xiamen UniversityXiamen361102China College of Chemistry and Chemical Engineering Shenyang Normal UniversityShenyang110034China

The pursuit of high-performance is worth considerable effort in catalysis for energy efficiency and environmental sustainability. To develop redox catalysts with superior performance for soot combustion, a series of Mn_(x)Co_(y) oxides were synthesized using MgO template substitution.This method greatly improves the preparation and catalytic efficiency and is more in line with the current theme of green catalysts and sustainable development. The resulting Mn_(1)Co_(2.3) has a strong activation capability of gaseous oxygen due to a high concentration of Co^(3+) and Mn^(3+). The Mn doping enhanced the intrinsic activity by prompting oxygen vacancy formation and gaseous oxygen adsorption. The nanosheet morphology with abundant mesoporous significantly increased the solid–solid contact efficiency and improved the adsorption capability of gaseous reactants. The novel design of Mn_(1)Co_(2.3)oxide enhanced its catalytic performance through a synergistic effect of Mn doping and the porous nanosheet morphology, showing significant potential for the preparation of high-performance soot combustion catalysts.

关键词： Soot combustion Intrinsic activity Contact efficiency Mn doping DFT

Discovering Cathodic Biocompatibility for Aqueous Zn–MnO_(2) Battery:An Integrating Biomass Carbon Strategy

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Nano-Micro Letters 2024年第6期16卷 111-126页

作者： Wei Lv Zilei Shen xudong Li Jingwen Meng Weijie Yang Fang Ding Xing Ju Feng Ye Yiming Li xuefeng Lyu miaomiao Wang Yonglan Tian Chao xu Institute of Energy Power Innovation North China Electric Power UniversityBeijing 102206People’s Republic of China Department of Power Engineering School of EnergyPower and Mechanical EngineeringNorth China Electric Power UniversityBaoding 071003People’s Republic of China Key Laboratory of RNA Biology Institute of BiophysicsChinese Academy of SciencesBeijing 100101People’s Republic of China Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi‑Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010People’s Republic of China

Developing high-performance aqueous Zn-ion batteries from sustainable biomass becomes increasingly vital for large-scale energy storage in the foreseeable future.Therefore,γ-MnO_(2) uniformly loaded on N-doped carbon derived from grapefruit peel is successfully fabricated in this work,and particularly the composite cathode with carbon carrier quality percentage of 20 wt%delivers the specific capacity of 391.2 mAh g^(−1)at 0.1 A g^(−1),outstanding cyclic stability of 92.17%after 3000 cycles at 5 A g^(−1),and remarkable energy density of 553.12 Wh kg^(−1) together with superior coulombic efficiency of~100%.Additionally,the cathodic biosafety is further explored specifically through in vitro cell toxicity experiments,which verifies its tremendous potential in the application of clinical medicine.Besides,Zinc ion energy storage mechanism of the cathode is mainly discussed from the aspects of Jahn–Teller effect and Mn domains distribution combined with theoretical analysis and experimental data.Thus,a novel perspective of the conversion from biomass waste to biocompatible Mn-based cathode is successfully developed.

关键词： Aqueous Zn-ion batteries Biocompatibility Jahn-Teller effect Mn domains γ-MnO_(2)

Solving the subset sum problem by the quantum Ising model with variational quantum optimization based on conditional values at risk

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Science China(Physics,Mechanics & Astronomy) 2024年

作者： Qilin Zheng miaomiao Yu Pingyu Zhu Yan Wang Weihong Luo Ping xu Institute for Quantum Information and State Key Laboratory of High Performance Computing College of Computer Science and Technology National University of Defense Technology Hefei National Laboratory

The subset sum problem is a combinatorial optimization problem, and its complexity belongs to the nondeterministic polynomial time complete(NP-Complete) class. This problem is widely used in encryption, planning or scheduling, and integer partitions.An accurate search algorithm with polynomial time complexity has not been found, which makes it challenging to be solved on classical computers. To effectively solve this problem, we translate it into the quantum Ising model and solve it with a variational quantum optimization method based on conditional values at risk. The proposed model needs only n qubits to encode 2ndimensional search space, which can effectively save the encoding quantum resources. The model inherits the advantages of variational quantum algorithms and can obtain good performance at shallow circuit depths while being robust to noise, and it is convenient to be deployed in the Noisy Intermediate Scale Quantum era. We investigate the effects of the scalability, the variational ansatz type, the variational depth, and noise on the model. Moreover, we also discuss the performance of the model under different conditional values at risk. Through computer simulation, the scale can reach more than nine qubits. By selecting the noise type,we construct simulators with different QVs and study the performance of the model with them. In addition, we deploy the model on a superconducting quantum computer of the Origin Quantum Technology Company and successfully solve the subset sum problem. This model provides a new perspective for solving the subset sum problem.

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Overcoming genotypic dependency and bypassing immature embryos in wheat transformation by using morphogenic regulators

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Science China(Life Sciences) 2024年第7期67卷 1535-1538页

作者： Ziru Zhou Yawen Yang Guo Ai miaomiao Zhao Baozhu Han Chunjie Zhao Yiqian Chen Yuwei Zhang Hong Pan Caixia Lan Chao He Qiang Li Jieting xu Wenhao Yan National Key Laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhan 430070China WIMI Biotechnology Co. Ltd.Changzhou 213025China

Dear Editor,Agrobacterium-mediated transformation technology is of vital importance for functional genomics studies and precision breeding in crops due to low cost and clear genetic manifestation.A morphogenic gene pa... 详细信息

关键词： breeding crops transformation

CHCHD2 Thr61Ile mutation impairs F1F0-ATPase assembly in in vitro and in vivo models of Parkinson's disease

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Neural Regeneration Research 2024年第1期19卷 196-204页

作者： Xiang Chen Yuwan Lin Zhiling Zhang Yuting Tang Panghai Ye Wei Dai Wenlong Zhang Hanqun Liu Guoyou Peng Shuxuan Huang Jiewen Qiu Wenyuan Guo Xiaoqin Zhu Zhuohua Wu Yaoyun Kuang Pingyi xu miaomiao Zhou Department of Neurology The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Neurology The People’s Hospital of Guangxi Zhuang Autonomous RegionNanningGuangxi Zhuang Autonomous RegionChina School of Basic Medical Sciences Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Neurology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiChina

Mitochondrial dysfunction is a significant pathological alte ration that occurs in Parkinson's disease(PD),and the Thr61lle(T61I)mutation in coiled-coil helix coiled-coil helix domain containing 2(CHCHD2),a crucial mitochondrial protein,has been reported to cause Parkinson's disease.FIFO-ATPase participates in the synthesis of cellular adenosine triphosphate(ATP)and plays a central role in mitochondrial energy metabolism.However,the specific roles of wild-type(WT)CHCHD2 and T611-mutant CHCHD2 in regulating F1FO-ATPase activity in Parkinson's disease,as well as whether CHCHD2 or CHCHD2 T61I affects mitochondrial function through regulating F1FO-ATPase activity,remain unclea r.Therefore,in this study,we expressed WT CHCHD2 and T61l-mutant CHCHD2 in an MPP^(+)-induced SH-SY5Y cell model of PD.We found that CHCHD2 protected mitochondria from developing MPP^(+)-induced dysfunction.Under normal conditions,ove rexpression of WT CHCHD2 promoted F1FO-ATPase assembly,while T61I-mutant CHCHD2 appeared to have lost the ability to regulate F1FO-ATPase assembly.In addition,mass spectrometry and immunoprecipitation showed that there was an interaction between CHCHD2 and F1FO-ATPase.Three weeks after transfection with AAV-CHCHD2 T61I,we intraperitoneally injected 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine into mice to establish an animal model of chronic Parkinson's disease and found that exogenous expression of the mutant protein worsened the behavioral deficits and dopaminergic neurodegeneration seen in this model.These findings suggest that WT CHCHD2 can alleviate mitochondrial dysfunction in PD by maintaining F1F0-ATPase structure and function.

关键词： ATP synthase(F1F0-ATPase) coiled-coil helix coiled-coil helix domain containing 2 dopaminergic neuron mitochondrial dysfunction neurodegeneration oligomycin sensitivity-conferring protein Parkinson's disease T61I mutation tyrosine hydroxylase

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新媒介、新幻想与新现实

中国文艺评论 2024年第4期 47-54,I0002页

作者：许苗苗首都师范大学艺术与美育研究院

现实主义是一个随历史变迁而不断调整的概念,其在新媒介文艺中展现出诸多新质,网络文学为探讨新媒介现实主义提供了充分的空间。互联网上出现过优秀的现实主义作品,也存在将印刷文学理念生硬搬上网的移植现实主义作品,为获得政策扶植或... 详细信息

现实主义是一个随历史变迁而不断调整的概念,其在新媒介文艺中展现出诸多新质,网络文学为探讨新媒介现实主义提供了充分的空间。互联网上出现过优秀的现实主义作品,也存在将印刷文学理念生硬搬上网的移植现实主义作品,为获得政策扶植或奖项等进行题材定制的功利现实主义作品。当前网络文学中,即便是描写现实生活也多借幻想手段,这并非现实主义已经过时,而是传奇和幻想在网络上具备更强的媒介适应性。其实,网络文学并未偏离现实。跨界融合的新类型、差异运用的新手段、即时反馈的新经验,反映了网络时代更深层的现实。幻想和现实的斗争与融合,促使网络文学在曲径中探索表达的通途,新媒介文艺领域频繁涌现的内在矛盾推进了现实主义的持续变革和不断拓展。

关键词：新媒介网络文学现实主义新媒介现实主义

A Minireview of Marine Algal Virus-Coccolithoviruses

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Journal of Ocean University of China 2015年第2期14卷 293-300页

作者： LIU Jingwen xu miaomiao ZHENG Tianling College of Food and Bioengineering Jimei University Research Center of Food Microbiology and Enzyme Engineering Technology of Fujian Province State Key Laboratory for Marine Environmental Sciences and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystem School of Life Sciences Xiamen University

Coccolithophorid is unicellular marine microalgae with a global distribution in temperate and sub-temperate oceanic regions and has the ability to produce ‘the coccoliths'. It is considered to be the second most productive calcifying organism on earth and becoming an important factor in the global carbonate cycle. Emiliania huxleyi is one of the only two bloom-forming coccolithophores and becomes a species crucial to the study of global biogeochemical cycles and climate modeling. Coccolithoviruse is a recently discovered group of viruses infecting the marine coccolithophorid E. huxleyi. They are a major cause of coccolithophore bloom termination, and DMSP concentration is increasing in the process of viral lysis. Phylogenetic evidences support that some genes are functional both in E. huxleyi and its virus(Eh V). Horizontal gene transfer(HGT) of multiple functionally coupled enzymes occurs in E. huxleyi and its DNA virus Eh V has been confirmed, which contributes to the diversification and adaptation of plankton in the oceans and also critically regulates virus-host infection by allowing viruses to control host metabolic pathways for their replication. Therefore, it is of particular interest to understand this host-virus interaction. On this issue, we have made a minireview of coccolithoviruses focusing on the basic characteristics, phylogenesis, horizontal gene transfer and the interaction between the host and its viruses, as well as its important role in global biogeochemical cycling.

关键词：病毒变异海洋藻类生物地球化学循环水平基因转移控制主机基因水平转移病毒感染相互作用

经颅磁刺激对老年大鼠工作记忆相关跨脑区网络协同作用的影响

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电子与信息学报 2024年第4期46卷 1468-1478页

作者：郭苗苗翟昊迪吉利辉王田徐桂芝省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学) 天津300130 河北省生物电磁与神经工程重点实验室(河北工业大学) 天津300130 天津市生物电工与智能健康重点实验室(河北工业大学) 天津300130 河北工业大学生命科学与健康工程学院天津300130

经颅磁刺激(TMS)因其可以非侵入性地探测和调制大脑皮层兴奋性和功能,已被广泛地应用于改善大脑认知功能等临床神经调控领域。工作记忆的功能实现需要多个脑区的同步活动,该文将行为学与电生理学相结合,通过建立跨脑区的因果网络连接,... 详细信息

经颅磁刺激(TMS)因其可以非侵入性地探测和调制大脑皮层兴奋性和功能,已被广泛地应用于改善大脑认知功能等临床神经调控领域。工作记忆的功能实现需要多个脑区的同步活动,该文将行为学与电生理学相结合,通过建立跨脑区的因果网络连接,从记忆相关脑区间协同作用的角度探究不同模式的TMS对大脑认知功能的调控机制。首先对老年威斯塔大鼠分别实施重复经颅磁刺激(rTMS)及间歇性θ节律刺激(iTBS),并设置空白对照组,通过在体多通道微电极阵列采集大鼠工作记忆任务中的局部场电位信号(LFPs);之后基于定向传递函数构建LFPs脑因果网络;最后通过对比行为学结果差异、各脑区因果网络参数等,探索不同模式TMS对老年大鼠工作记忆行为学及脑区之间信息协同作用的影响规律。结果表明,rTMS组和iTBS组大鼠执行正确工作记忆任务的平均天数减少,平均正确率高于空白对照组。经过刺激后,rTMS组和iTBS组前额叶和海马双向网络连接明显增强,信息流强度和因果流向性得到显著提升(P<0.05)。因此,rTMS和iTBS模式均能促进老年大鼠海马和前额叶脑区间的信息交流,从而使老年大鼠的工作记忆能力得到改善。

关键词：重复经颅磁刺激间歇性θ节律刺激工作记忆脑因果网络