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Sequence structure controllable polymerization-induced self-assembly

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Science China Chemistry 2024年第1期67卷 390-397页

作者： Zi-Xuan Chang Ren-Man Zhu chun-yan Hong Wen-Jian Zhang Department of Polymer Science and Engineering University of Science and Technology of ChinaHefei 230026China Institute of physical Science and Information Technology Anhui UniversityHefei 230601China Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province Anhui UniversityHefei 230601China

Polymerization-induced self-assembly(PISA)combines synthesis and self-assembly of artificial polymers in one-pot,which brings us one step closer to emulating ***,the reported PISA formulations primarily focus on developing nano-objects with new chemical compositions and rarely on structural regulation of polymers with specific ***,sequence structure controllable polymerization-induced self-assembly(SCPISA)is reported by using 7-(2.methacryloyloxyethoxy)-4-methylcoumarin(CMA)as a *** the copolymerization of 2.hydroxyethyl methacrylate(HEMA)and CMA,controlled incorporation of CMA units into the polymer chains can be realized by programmable light/heat ***-based P(HEMA-co-CMA)copolymers with the same composition but different sequence structures generate a range of ***,the morphologies of the resultant nano-objects can also be controlled by regulating the feed molar ratio of CMA and HEMA,which is similar to the conventional PISA,but the synthesis procedure is obviously simplified in *** versatility of the methodology is further demonstrated by the fabrication of different functional nano-objects with sequence structure-dependent morphologies in SCPISA systems with different functional monomers.

关键词： polymerization-induced self-assembly sequence-controlled polymers PET-RAFT polymerization

A deep learning interatomic potential suitable for simulating radiation damage in bulk tungsten

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Tungsten 2024年第2期6卷 304-322页

作者： Chang-Jie Ding Ya-Wei Lei Xiao-yang Wang Xiao-Lin Li Xiang-yan Li yan-Ge Zhang Yi-chun Xu Chang-Song Liu Xue-Bang Wu Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China Science Island University of Science and Technology of ChinaHefei 230026China Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijing 100088China

So far, it has been a challenge for existing interatomic potentials to accurately describe a wide range of physical properties and maintain reasonable efficiency. In this work, we develop an interatomic potential for simulating radiation damage in body-centered cubic tungsten by employing deep potential, a neural network-based deep learning model for representing the potential energy surface. The resulting potential predicts a variety of physical properties consistent with first-principles calculations, including phonon spectrum, thermal expansion, generalized stacking fault energies, energetics of free surfaces, point defects, vacancy clusters, and prismatic dislocation loops. Specifically, we investigated the elasticity-related properties of prismatic dislocation loops, i.e., their dipole tensors, relaxation volumes, and elastic interaction energies. This potential is found to predict the maximal elastic interaction energy between two 1/2. loops better than previous potentials, with a relative error of only 7.6%. The predicted threshold displacement energies are in reasonable agreement with experimental results, with an average of 12. eV. The efficiency of the present potential is also comparable to the tabulated gaussian approximation potentials and modified embedded atom method potentials, meanwhile, can be further accelerated by graphical processing units. Extensive benchmark tests indicate that this potential has a relatively good balance between accuracy, transferability, and efficiency.

关键词： Machine learning Deep learning Interatomic potential Radiation damage Tungsten

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后人类时代技术交往实践的哲学反思

科学技术哲学研究 2024年第4期41卷 121-128页

作者：衡孝庆魏春艳温州大学马克思主义学院浙江温州325035

后人类时代的工业技术使人类摆脱物质生产的匮乏状态,通过对理性地位的推崇确认了人的主体地位,但是工业化也带来了贫富差距不断扩大等社会问题以及对自然生态的破坏等恶性后果。当后人类时代对技术的哲学追问深入到精神层面,动摇人的... 详细信息

后人类时代的工业技术使人类摆脱物质生产的匮乏状态,通过对理性地位的推崇确认了人的主体地位,但是工业化也带来了贫富差距不断扩大等社会问题以及对自然生态的破坏等恶性后果。当后人类时代对技术的哲学追问深入到精神层面,动摇人的主体性的同时,也摧毁了自我的完整性和同一性,使人类陷入道德碎片化的困境。自然主义认识论把人类意识还原为神经细胞的功能性活动,灵魂成为肉体的副产品,必然会颠覆人类的自我认知。人工智能和生物技术的应用,改变了社会认知和社会团结,对技术发展的社会生态产生影响,最终导致社会与政治的技术分化,使人类不得不面对新的政治难题。

关键词：后人类技术交往实践哲学反思

Layered oxide cathodes for sodium-ion batteries:microstructure design,local chemistry and structural unit

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Science China Chemistry 2024年第1期67卷 191-213页

作者： Ling-Yi Kong Han-Xiao Liu yan-Fang Zhu Jia-yang Li Yu Su Hong-Wei Li Hai-yan Hu Yi-Feng Liu Ming-Jing yang Zhuang-chun Jian Xin-Bei Jia Shu-Lei Chou Yao Xiao Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Because of the low price and abundant reserves of sodium compared with lithium,the research of sodium-ion batteries(SIBs)in the field of large-scale energy storage has returned to the research *** oxides distinguish themselves from the mains cathode materials of SIBs owing to their advantages such as high specific capacity,simple synthesis route,and environmental ***,the commercial development of the layered oxides is limited by sluggish kinetics,complex phase transition and poor air *** on the research ideas from macro-to micro-scale,this review systematically summarizes the current optimization strategies of sodium-ion layered oxide cathodes(SLOC)from different dimensions:microstructure design,local chemistry regulation and structural unit *** the dimension of microstructure design,the various structures such as the microspheres,nanoplates,nanowires and exposed active facets are prepared to improve the slow kinetics and electrochemical ***,from the view of local chemistry regulation by chemical element substitution,the intrinsic electron/ion properties of SLOC have been enhanced to strengthen the structural ***,the optimization idea of endeavors to regulate the physical and chemical properties of cathode materials essentially is put forward from the dimension of structural unit *** opinions and strategies proposed in this review will provide some inspirations for the design of new SLOC in the future.

关键词： sodium-ion batteries layered oxide cathodes microstructure design local chemistry structural unit

Non-Gaussian quantum states generated via quantum catalysis and their statistical properties

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Chinese Physics B 2024年第4期33卷 332-337页

作者：张晓燕杨春燕王继锁孟祥国 Shandong Provincial Key Laboratory of Laser Polarization and Information Technology School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165China Shandong National Secondary Vocational School Qingzhou 262500China School of Basic Medical Sciences Weifang Medical UniversityWeifang 261000China

A new kind of non-Gaussian quantum catalyzed state is proposed via multiphoton measurements and two-mode squeezing as an input of thermal *** characteristics of the generated multiphoton catalysis output state depends on the thermal parameter,catalyzed photon number and squeezing *** then analyze the nonclassical properties by examining the photon number distribution,photocount distribution and partial negativity of the Wigner *** findings indicate that nonclassicality can be achieved through the implementation of multiphoton catalysis operations and modulated by the thermal parameter,catalyzed photon number and squeezing parameter.

关键词： two-mode squeezing multiphoton catalysis nonclassicality Wigner function

Innovative integration of lung ultrasound and wearable monitoring for predicting pulmonary complications in colorectal surgery:A prospective study

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2649-2661页

作者： Chen Lin Pei-Pei Wang Zi-yan Wang Guo-Ru Lan Kai-Wen Xu chun-Hua Yu Bin Wu Department of General Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China School of Medicine Tsinghua UniversityBeijing 100084China Department of Anesthesiology Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of Clinical Laboratory Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

BACKGROUND Postoperative pulmonary complications(PPCs)are common in patients who undergo colorectal *** have focused on how to accurately diagnose and reduce the incidence of *** ultrasound has been proven to be useful in preoperative monitoring and postoperative care after cardiopulmonary ***,lung ultrasound has not been studied in abdominal surgeries and has not been used with wearable devices to evaluate the influence of postoperative ambulation on the incidence of *** To investigate the relationship between lung ultrasound scores,PPCs,and postoperative physical activity levels in patients who underwent colorectal *** In this prospective observational study conducted from November 1,2.19 to August 1,2.2.,patients who underwent colorectal surgery underwent daily bedside ultrasonography from the day before surgery to postoperative day(POD)*** ultrasound scores and PPCs were recorded and analyzed to investigate their *** bracelets measured the daily movement distance for 5 days post-surgery,and the correlation between postoperative activity levels and lung ultrasound scores was *** Thirteen cases of PPCs was observed in the cohort of 101 *** mean(standard deviation)peak lung ultrasound score was 5.32.2.52..Patients with a lung ultrasound score of≥6 constituted the high-risk ***-risk lung ultrasound scores were associated with an increased incidence of PPCs after colorectal surgery(logistic regression coefficient,1.715;odds ratio,5.556).Postoperative movement distance was negatively associated with the lung ultrasound scores[Spearman’s rank correlation coefficient(r),-0.356,P<0.05].CONCLUSION Lung ultrasound effectively evaluates pulmonary condition post-colorectal *** ambulation and respiratory exercises in the initial two PODs will reduce PPCs and optimize postoperative care in patients undergoing colorectal surgery.

关键词： Colorectal cancer Pulmonary complications Lung ultrasound Wearable devices Respiratory exercises

Ferricyanide-Promoted Oxidative Activation and Ligation of Protein Thioacids in Neutral Aqueous Media

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CCS Chemistry 2024年第8期6卷 2031-2043页

作者： Guo-Chao Chu Lu-Jun Liang Rui Zhao yan-yan Guo {2.-Tong Li Chong Zuo Huasong Ai Xiao Hua Zi-Chen Li Yi-Ming Li Lei Liu NewCornerstone Science Laboratory Tsinghua-Peking Center for Life SciencesMinistry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical BiologyCenter for Synthetic and Systems BiologyDepartment of ChemistryTsinghua UniversityBeijing 100084 School of Food and Biological Engineering Hefei University of TechnologyHefei 230009 Center for BioAnalytical Chemistry Hefei National Laboratory of Physical Science at MicroscaleUniversity of Science and Technology of ChinaHefei 230026 Department of Chemistry University of Science and Technology of ChinaHefei 230026

Ferricyanide-promoted oxidative activation of Nacylatedα-aminothioacids for amide bond formation withα-aminonitriles was recently shown to be a plausible pathway for prebiotic peptide *** we describe the finding that by adding sodium azide and thiols,ferricyanide oxidation can elicit highly efficient and clean conversion of fully unprotected peptide or protein thioacids in neutral aqueous media to the corresponding *** transformation enables the development of ferricyanide-promoted thioacid-based native chemical ligation(NCL)as a new redox-based method for chemical protein synthesis,which does not need to change pH and is therefore operationally easy for ligation at small *** effectiveness of the ferricyanide-promoted thioacid-based NCL was illustrated by synthesis of an ISG15-modified MDA5 segment under nondenaturing conditions and synthesis of an acetylated ubiquitin(Ub)-modified histone H2. through an N-to-C sequential *** work broadens the concept of on-demand oxidative activation strategy for protein ligation and provides a new useful supplement to the repertoire of methods for chemical protein synthesis,particularly for studies on proteins carrying Ub family modifications.

关键词： chemical protein synthesis protein thioacid ferricyanide oxidation native chemical ligation ubiquitin family modifications

Analysis of risk factors for postoperative anxiety and depression in endometriosis patients with reproductive intention

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World Journal of Psychiatry 2024年第9期14卷 1364-1374页

作者： chun-Mei Wu Cai-Hua Li You-yan Fang Huan Wu Dong-Mei Ji Ping Zhou Yun-Xia Cao Ye He Zhao-Lian Wei Department of Obstetrics and Gynecology the First Affiliated Hospital of Anhui Medical UniversityHefei 230000Anhui ProvinceChina Department of Obstetrics and Gynecology Huaibei People's Hospital of Anhui ProvinceHuaibei 235000Anhui ProvinceChina

BACKGROUND The occurrence of postoperative depression and anxiety in patients with endomet-riosis(EMS)not only causes psychological distress,but may also harm their physical *** To explore the postoperative depression status,and its influencing factors,of EMS patients with reproductive *** A total of 32. EMS patients with reproductive intent were *** the self-rating anxiety scale and self-rating depression scale,EMS patients with anxiety or depression were distinguished.A clinical model for predicting anxiety or depression in EMS patients was constructed and evaluated using a nomogram,receiver operating characteristic curve,and calibration *** The results of the single factor analysis showed that smoking,coffee,EMS stage,chronic pelvic pain,and sexual discomfort may be related to ***,smoking,drinking,spouse,annual household income and EMS stage may be related to depression in EMS *** logistic regression illustrated that smoking,coffee,chronic pelvic pain and sexual discomfort may be inde-pendent risk factors for anxiety in EMS patients,while smoking,EMS stage(Phase III and Phase IV),spouse and high annual household income may be independent risk factors for depression in EMS ***,the models used to predict the risk of anxiety or depression in EMS patients have good predictive *** The anxiety and depression of EMS patients may be related to many *** clinical treatment,additional attention should be paid to the psychological status of EMS patients.

关键词： Endometriosis Reproductive intention Anxiety Depressed

电针对帕金森病大鼠中脑黑质Sirt3/NLRP3/GSDMD信号通路的影响

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针刺研究 2024年第4期49卷 384-390页

作者：汪瑶王彦春马骏湖北中医药大学体育健康学院武汉430060 湖北中医药大学针灸骨伤学院/针灸治未病湖北省协同创新中心武汉430060 湖北中医药大学中医学院武汉430060

目的:观察电针“风府”“太冲”“足三里”对帕金森病(PD)模型大鼠中脑黑质酪氨酸羟化酶(TH)、α-突触核蛋白(α-syn)及沉默信息调节因子同源蛋白3(Sirt3)、NOD样受体3(NLRP3)、消皮素D(GSDMD)的影响,探讨电针治疗PD的机制。方法:SD大... 详细信息

目的:观察电针“风府”“太冲”“足三里”对帕金森病(PD)模型大鼠中脑黑质酪氨酸羟化酶(TH)、α-突触核蛋白(α-syn)及沉默信息调节因子同源蛋白3(Sirt3)、NOD样受体3(NLRP3)、消皮素D(GSDMD)的影响,探讨电针治疗PD的机制。方法:SD大鼠随机分为对照组、模型组、电针组,每组10只。采用颈背部皮下注射鱼藤酮复制PD大鼠模型。电针组给予电针“风府”“太冲”“足三里”,30 min/次,1次/d,连续治疗2. d。采用旷场实验检测大鼠自主运动总路程;爬杆实验检测大鼠肢体协调能力;免疫组织化学法检测大鼠中脑黑质组织中TH的阳性表达;实时荧光定量PCR法检测大鼠黑质组织中α-syn、Sirt3、NLRP3、GSDMD mRNA表达水平;Western blot法检测大鼠黑质组织中NLRP3、接头蛋白-凋亡相关斑点样蛋白(ASC)、半胱氨酸蛋白酶-1(Caspase-1)蛋白表达水平。结果:与对照组比较,模型组大鼠旷场实验自主运动总路程缩短(P<0.01);爬杆实验评分升高(P<0.01);中脑黑质TH阳性表达减少(P<0.01);Sirt3 mRNA表达水平降低(P<0.01),α-syn、NLRP3、GSDMD mRNA表达水平升高(P<0.01);NLRP3、ASC、Caspase-1蛋白表达水平升高(P<0.01)。与模型组比较,电针组旷场实验自主运动总路程延长(P<0.01);爬杆实验评分降低(P<0.05);中脑黑质TH阳性表达增多(P<0.01);Sirt3 mRNA表达水平升高(P<0.01),α-syn、NLRP3、GSDMD mRNA表达水平降低(P<0.01);NLRP3、ASC、Caspase-1蛋白表达水平降低(P<0.01,P<0.05)。结论:电针“风府”“太冲”“足三里”可修复PD大鼠神经元损伤,清除中脑黑质异常聚集的α-syn,改善线粒体损伤,其机制可能与调控中脑黑质Sirt3/NLRP3/GSDMD信号通路进而抑制神经炎性反应有关。

关键词：帕金森病电针沉默信息调节因子同源蛋白3 NOD样受体3 消皮素D