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Copper-catalyzed enantioselective desymmetrizing C(sp^(2))-H functionalization of azide-ynamides via α-imino copper carbenes

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Science China Chemistry 2024年第9期67卷 2982-2988页

作者： En-He Huang Li-Gao Liu You-Wei Yin Hao-Xuan Dong ji-jia Zhou Xin Lu Bo Zhou Long-Wu Ye Key Laboratory for Chemical Biology of Fujian Province and State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

α-Imino metal carbenes are versatile intermediates in organic synthesis,and have broad applications in the assembly of divergent ***,the catalytic enantioselective desymmetrization based onα-imino metal carbenes has not been developed to ***,we disclose an enantioselective desymmetrizing C(sp^(2))-H functionalization of azide-ynamides viaα-imino copper carbenes,leading to the efficient assembly of divergent chiral indoloazepines in generally moderate to excellent yields with high ***,this reaction represents the first enantioselective desymmetrization based onα-imino metal *** synthetic transformations and biological tests show the potential utility of this ***,computational studies are employed to elucidate the reaction mechanism and the origin of enantioselectivity.

关键词： enantioselective desymmetrization metal carbenes copper catalysis nitrene transfer alkynes

RKKY interaction in helical higher-order topological insulators

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Chinese Physics B 2024年第7期33卷 587-593页

作者：金莎李健李清旭朱家骥 School of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China Institute for Advanced Sciences Chongqing University of Posts and TelecommunicationsChongqing 400065China Southwest Center for Theoretical Physics Chongqing UniversityChongqing 401331Chin

We theoretically investigate the Ruderman–Kittel–Kasuya–Yosida(RKKY) interaction in helical higher-order topological insulators(HOTIs), revealing distinct behaviors mediated by hinge and Dirac-type bulk carriers. Our findings show that hinge-mediated interactions consist of Heisenberg, Ising, and Dzyaloshinskii–Moriya(DM) terms, exhibiting a decay with impurity spacing z and oscillations with Fermi energy εF. These interactions demonstrate ferromagnetic behaviors for the Heisenberg and Ising terms and alternating behavior for the DM term. In contrast, bulk-mediated interactions include Heisenberg, twisted Ising, and DM terms, with a conventional cubic oscillating decay. This study highlights the nuanced interplay between hinge and bulk RKKY interactions in HOTIs, offering insights into designs of next-generation quantum devices based on HOTIs.

关键词： magnetic impurity interactions magnetic ordering spintronics topological phases

Acupuncture with different frequencies for tobacco dependence: a randomized controlled trial

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Journal of Traditional Chinese Medicine 2024年

作者： CHEN Shumin LIU Zhenyu ji jia WANG Yingying YANG jinsheng CHANG jin LI Zhihua Institute of Acupuncture and Moxibustion， China Academy of Chinese Medical Sciences Institute of Basic Theory for Chinese Medicine， China Academy of Chinese Medical Sciences

OBJECTIVE: To observe the effect of different acupuncture frequencies on the abstinence rate which could be used as a reference for optimizing acupuncture cessation ***: From July 2018 to June 2022， a total of 220 smokers were recruited based on inclusion criteria and randomly divided into the high-frequency acupuncture group (HF group， n = 110): 5 times a week from the 1st to the 4th week， from weeks 5 to 8， three times a week and the low-frequency acupuncture group (LF group， n = 110): 3 times a week from the 1st to the 4th week， from weeks 5 to 8， twice a week， then treated for 8 weeks and follow-up at 1 month in ***: In total， 162 subjects completed the whole study with a drop-out rate of 20.45%. The expiratory CO point abstinence rate was HF group 53/110 (48.18%) vs LF group 41/110 (37.27%) in Week 8 (P = 0.102) and HF group 46/110 (41.82%) vs LF group 45/110 (40.91%) in Week 12 (P = 0.891) and the HF acupuncture and LF acupuncture were nearly equal in the 8-week abstinence rate. In addition， both HF and LF acupuncture significantly reduced Fagerstr?m test for nicotine dependence scale (FTND) scores (P < 0.05)， Minnesota nicotine withdrawal scale (MNWS) scores (P < 0.05)， and Brief Questionnaire of Smoking Urges scale (QSU-Brief) scores (P < 0.05)， but HF acupuncture showed some superiority over LF acupuncture in relieving patients' smoking cravings (P < 0.05).Conclusions: The study initially showed that both high-frequency acupuncture and low-frequency acupuncture treatment were safe and effective on smoking cessation for 8 weeks， but high-frequency acupuncture was advantageous in reducing smoking cravings. More accurate acupuncture frequency needs to be validated through larger clinical studies to optimize acupuncture smoking cessation programs.

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Security of quantum key distribution with virtual mutually unbiased bases

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 13-21页

作者： Hong-Wei Li Chen-Peng Hao Zhi-jiang Chen Li Gong Yi-Fei Lu Yang Wang jia-ji Li Chun-Mei Zhang Rong Wang Zhen-Qiang Yin Qing-Yu Cai Henan Key Laboratory of Quantum Information and Cryptography SSF IEUZhengzhou 450000China Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China Department of Physics University of Hong KongHong Kong 999077China Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China School of Information and Communication Engineering Hainan UniversityHaikou 570228China

In a perfect quantum key distribution(QKD)protocol,quantum states should be prepared and measured with mutually unbiased bases(MUBs).However,in a practical QKD system,quantum states are generally prepared and measured with imperfect MUBs using imperfect devices,possibly reducing the secret key rate and transmission *** analyze the security of a QKD system with imperfect MUBs,we propose virtual MUBs to characterize the quantum channel against collective attack,and analyze the corresponding secret key rate under imperfect state preparation and measurement *** generally,we apply the advantage distillation method for analyzing the security of QKD with imperfect MUBs,where the error tolerance and transmission distance can be sharply *** analysis method can be applied to benchmark and standardize a practical QKD system,elucidating the security analysis of different QKD protocols with imperfect devices.

关键词： quantum key distribution mutually unbiased bases advantage distillation

Mesenchymal stem cell-derived exosomes as a new drug carrier for the treatment of spinal cord injury:A review

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Chinese Journal of Traumatology 2024年第3期27卷 134-146页

作者： Lin-Fei Cheng Chao-Qun You Cheng Peng jia-ji Ren Kai Guo Tie-Long Liu Medical College.Anhui University of Science and Technology Huainan232000Anhui provinceChina Department of Orthopaedic Oncology Changzheng HospitalNavy Medical UniversityShanghai200003China Department of Orthopaedics The Central Hospital of Shanghai Putuo DistrictShanghai200333China

Spinal cord injury(SCI)is a devastating traumatic disease seriously impairing the quality of life in *** to allow the hopeless central nervous system to repair itself after injury are *** new approaches to regenerate the central nervous system is still the *** derived from mesenchymal stem cells(MSC-Exo)have been proven to robustly quench the inflammatory response or oxidative stress and curb neuronal apoptosis and autophagy following SCI,which are the key processes to rescue damaged spinal cord neurons and restore their ***,MSC-Exo in SCI received scant *** this review,we reviewed our previous work and other studies to summarize the roles of MSC-Exo in SCI and its underlying ***,we also focus on the application of exosomes as drug carrier in *** particular,it combs the advantages of exosomes as a drug carrier for SCI,imaging advantages,drug types,loading methods,etc.,which provides the latest progress for exosomes in the treatment of SCI,especially drug carrier.

关键词： Spinal cord injury Mesenchymal stem cell Exosomes Mechanism Drug carrier

Reference-frame-independent quantum key distribution with two-way classical communication

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Chinese Physics B 2024年第10期33卷 146-152页

作者： Chun Zhou Hai-Tao Wang Yi-Fei Lu Xiao-Lei jiang Yan-Mei Zhao Yu Zhou Yang Wang jia-ji Li Yan-Yang Zhou Xiang Wang Hong-Wei Li Wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography SSF IEUZhengzhou 450001China

The data post-processing scheme based on two-way classical communication(TWCC)can improve the tolerable bit error rate and extend the maximal transmission distance when used in a quantum key distribution(QKD)*** this study,we apply the TWCC method to improve the performance of reference-frame-independent quantum key distribution(RFI-QKD),and analyze the influence of the TWCC method on the performance of decoy-state RFI-QKD in both asymptotic and non-asymptotic *** numerical simulation results show that the TWCC method is able to extend the maximal transmission distance from 175 km to 198 km and improve the tolerable bit error rate from 10.48%to 16.75%.At the same time,the performance of RFI-QKD in terms of the secret key rate and maximum transmission distance are still greatly improved when statistical fluctuations are *** conclude that RFI-QKD with the TWCC method is of practical interest.

关键词： quantum key distribution reference-frame-independent two-way classical communication

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减重及代谢外科手术的关键技术标准及评价

中国实用外科杂志 2024年第1期44卷 70-73页

作者：王勇谢佳冀中国医科大学第四医院普外科辽宁沈阳110032

减重手术在全球开展多年,经过不断的技术创新,已由最初的开放性手术方式逐渐发展为微创的减重手术。随着手术的广泛开展与普及,人们逐渐认识到手术的规范化程度将直接影响病人术后的减重效果及术后并发症的出现。因此,对手术操作细节的... 详细信息

减重手术在全球开展多年,经过不断的技术创新,已由最初的开放性手术方式逐渐发展为微创的减重手术。随着手术的广泛开展与普及,人们逐渐认识到手术的规范化程度将直接影响病人术后的减重效果及术后并发症的出现。因此,对手术操作细节的规范化、标准化受到了业界的高度重视并推出多部减重代谢外科临床指南来规范此类手术的开展。肥胖及相关代谢性疾病的外科治疗是一个不断发展和创新的领域,需要根据不同病人的情况和需求,选择合适的手术方式和技术,同时也要遵循一定的规范和标准,以保证手术的质量和效果,同时也要加强术后的管理和随访,以实现病人受益的最大化。

关键词：减重手术指南与共识质量控制

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张松茂瓷画艺术中的装饰性语言研究

中国陶瓷 2024年第3期60卷 91-94页

作者：邱嘉冀景德镇学院景德镇333000

张松茂是当代著名瓷画艺术家,他的瓷画艺术具有鲜明而独树一帜的装饰性语言,具有突出的成就。在历史溯源的基础上分析探索张松茂瓷画艺术中的装饰性语言发展、形成因素、表现形式以及价值、影响。学艺“珠山八友”、写生与新彩油画的创... 详细信息

张松茂是当代著名瓷画艺术家,他的瓷画艺术具有鲜明而独树一帜的装饰性语言,具有突出的成就。在历史溯源的基础上分析探索张松茂瓷画艺术中的装饰性语言发展、形成因素、表现形式以及价值、影响。学艺“珠山八友”、写生与新彩油画的创作、大型陶瓷壁画的创作,以及后期思想的提升是张松茂瓷画艺术成就的主要形成因素。张松茂瓷画艺术在线条以及点、色彩、构图等方面形成了独特的装饰性语言表现形式,对于当代瓷画艺术的发展具有重要的影响。

关键词：张松茂瓷画艺术装饰性语言成就

义符认知功能的心理语言学探索——三十年研究工作之回顾

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西北师大学报（社会科学版） 2024年第1期61卷 104-117页

作者：张积家王斌广西师范大学教育学部广西桂林514004 江苏师范大学教育科学学院江苏徐州221116

在汉字词认知研究中,义符是最具有特色的领域。义符在汉字词认知中具有重要的功能。三十年来,诸多研究者考察了义符在汉字词识别、语义提取、语法分类、知觉加工和语音提取等方面的作用,揭示了义符作为汉字部件系统的类聚功能,探索了义... 详细信息

在汉字词认知研究中,义符是最具有特色的领域。义符在汉字词认知中具有重要的功能。三十年来,诸多研究者考察了义符在汉字词识别、语义提取、语法分类、知觉加工和语音提取等方面的作用,揭示了义符作为汉字部件系统的类聚功能,探索了义符的主观熟悉性、位置、频率、家族大小、类别一致性和句法倾向性的影响,并采用脑科学技术探讨了义符激活在形声字认知中的时间进程,相继提出了义符参与汉字词认知加工的7个模型。未来应该对义符与汉字的构造规律、义符的表义类型和表义度、义符与英文词根的对比、义符认知功能与汉民族思维方式的关系做进一步的研究。

关键词：义符语义语法认知功能加工模型