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Analyses of Reaction Mechanisms among Different Sulfonation Reagents and m-Diphenylamine and Crystal Structures of the Formed Compounds

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Journal of Materials Science and Chemical Engineering 2024年第4期12卷 84-97页

作者： Dongdong Chen Chundong Mi menglan yuan Aiquan Jia Qian-Feng Zhang Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma&#8217anshan China

In the traditional process, m-phenylenediamine reacts with fuming sulfuric acid at high temperature to get intermediates, and then after dehydration occurs intramolecular rearrangement to get 2,4-diaminobenzenesulfonic acid. Traditional methods need to consume a lot of fuming sulfuric acid or concentrated sulfuric acid, resulting in high industrial large-scale production cost, more waste, and posing a serious environmental pollution risk. In this thesis, three different sulfonation reagents were used for the sulfonation reaction of m-phenylenediamine, and the reaction mechanisms and crystal structures of the three pathways were investigated. The three routes are: 1) one-step synthesis of monosulfonated compound 1 from raw material and sulfur trioxide (SO3);2) rapid reaction of raw material and chlorosulfonic acid to synthesize bisulfonated compound 2;3) direct eutectic crystallization of raw material and ordinary sulfuric acid to obtain compound 3. The crystal structure of the compounds synthesized by three paths was analyzed by X-ray single crystal diffraction, and compound 1 was characterized by NMR, Fourier infrared spectra, UV-visible spectrum and Mass spectrometry. The one-step synthesis of SO3 as a sulfonation reagent has the advantages of mild reaction conditions, simple operation and low cost.

关键词： 2 4-Diaminobenzenesulfonic Acid Sulfur Trioxide (SO3) Spectrometry Crystal Structure

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世居高原竞走运动员高高原训练模式的研究

首都体育学院学报 2018年第1期30卷 55-59页

作者：白旭宇袁梦兰云南省体育科学研究所云南昆明650041 云南省体育职业技术学院云南昆明650228

世居高原竞走运动员上到更高海拔的高原进行训练,可有效地提高运动员的有氧能力和综合竞技能力,是世居高原运动员的特殊训练方法之一。对世居高原竞走运动员的3种高高原训练模式及反映运动员身体机能变化情况的生化指标进行分析。总结... 详细信息

世居高原竞走运动员上到更高海拔的高原进行训练,可有效地提高运动员的有氧能力和综合竞技能力,是世居高原运动员的特殊训练方法之一。对世居高原竞走运动员的3种高高原训练模式及反映运动员身体机能变化情况的生化指标进行分析。总结出世居高原竞走运动员高高原训练的基本原则,即选择适宜高高原海拔的穿梭式训练、打好充足的有氧能力储备基础、执行科学合理的高高原训练安排、采取公路山坡越野走的训练方式、适当安排亚高原的衔接性训练等。通过对世居高原竞走运动员高高原训练合理模式的探讨,充实我国世居高原运动员高原训练的内容。

关键词：世居高原竞走运动员高高原训练训练模式

SUMO特异性蛋白酶1诱导蛋白质去小泛素相关修饰增加子宫内膜癌侧群细胞化疗敏感性

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中华肿瘤杂志 2022年第12期44卷 1362-1368页

作者：袁梦岚白洁李承尧薛娜陈旭红盛凤刘晓智李圃天津市第五中心医院妇产科天津300450 天津市中心妇产科医院妇产科天津300052 天津市早产儿器官发育表观遗传重点实验室天津300450 天津市第五中心医院中医科天津300450

目的探讨通过诱导蛋白质广泛去类泛素化修饰途径抑制子宫内膜癌的干性维持潜能,达到子宫内膜癌侧群细胞化疗增敏的目的。方法流式细胞术分选培养CD133^(+)CD44^(+)的KLE子宫内膜癌侧群细胞克隆球,Western blot法检测小泛素相关修饰蛋白1... 详细信息

目的探讨通过诱导蛋白质广泛去类泛素化修饰途径抑制子宫内膜癌的干性维持潜能,达到子宫内膜癌侧群细胞化疗增敏的目的。方法流式细胞术分选培养CD133^(+)CD44^(+)的KLE子宫内膜癌侧群细胞克隆球,Western blot法检测小泛素相关修饰蛋白1(SUMO1)及肿瘤侧群细胞干性维持基因八聚体结合转录因子4(Oct4)和性别决定区Y-box2(Sox2)蛋白的表达情况。慢病毒介导KLE侧群细胞稳定转染SUMO特异性蛋白酶1(SENP1)基因,Western blot法检测SENP1、SUMO1、Oct4和Sox2的蛋白表达;比较过表达与未过表达SENP1基因的KLE侧群细胞克隆形成率,流式细胞术检测细胞周期变化,四甲基偶氮唑蓝实验和流式细胞术检测子宫内膜癌侧群细胞对顺铂的化疗敏感性,子宫内膜癌荷瘤鼠模型检测SENP1过表达对顺铂的化疗敏感性影响。结果CD133^(+)CD44^(+)和CD133-CD44-子宫内膜癌KLE细胞克隆形成率分别为(23.64±5.03)%和(4.64±1.25)%,差异有统计学意义(P=0.003),CD133^(+)CD44^(+)子宫内膜癌KLE细胞中SUMO1、Oct4和Sox2蛋白表达水平高于CD133-CD44-子宫内膜癌KLE细胞(均P<0.05)。与未转染SENP1基因的KLE侧群细胞比较,SENP1过表达的KLE侧群细胞SUMO1、Oct4、Sox2蛋白表达水平降低,细胞克隆形成率由(25.67±5.44)%下降至(7.46±1.42)%,细胞周期发生由G0/G_(1)期向G_(2)期的偏移,顺铂半数抑制浓度由(55.46±6.14)μg/ml下降至(11.55±3.12)μg/ml,细胞凋亡率由(9.76±2.09)%上升至(16.79±3.44)%,差异均有统计学意义(均P<0.05)。过表达SENP1能够降低KLE侧群细胞增殖能力,增加化疗敏感性。结论通过过表达SENP1能够诱导蛋白质去SUMO化修饰,抑制子宫内膜癌侧群细胞的干性维持潜能,进而增强其化疗敏感性。

关键词：子宫内膜肿瘤小泛素相关修饰蛋白 SUMO特异性蛋白酶1 肿瘤侧群细胞顺铂

Co/Co_(7)Fe_(3)heterostructures with controllable alloying degree on carbon spheres as bifunctional electrocatalyst forrechargeable zinc-air batteries

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 476-487页

作者： Junkang Chen Yongyue Zhuang Yanxin Qiao Yu Zhang Aihua yuan Hu Zhou School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

Exploring efficient and nonprecious metal electrocatalysts of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is crucial for developing rechargeable zinc-air batteries(ZABs).Herein,an alloying-degree control strategy was employed to fabricate nitrogen-doped carbon sphere(NCS)decorated with dual-phase Co/Co_(7)Fe_(3)heterojunctions(CoFe@NCS).The phase composition of materials has been adjusted by controlling the alloying *** optimal CoFe_(0.08)@NCS electrocatalyst displays a half-wave potential of 0.80 V for ORR and an overpotential of 283 mV at 10 mA·cm^(-2)for OER in an alkaline *** intriguing bifunctional electrocatalytic activity and durability is attributed to the hierarchically porous structure and interfacial electron coupling of highly-active Co_(7)Fe_(3)alloy and metallic Co *** the CoFe_(0.08)@NCS material is used as air-cathode catalyst of rechargeable liquid-state zinc-air battery(ZAB),the device shows a high peak power-density(157 mW·cm^(-2))and maintains a stable voltage gap over 150 h,outperforming those of the benchmark(Pt/C+RuO_(2))-based *** particular,the as-fabricated solid-state flexible ZAB delivers a reliable compatibility under different bending *** work provides a promising strategy to develop metal/alloy-based electrocatalysts for the application in renewable energy conversion technologies.

关键词： bifunctional electrocatalysts oxygen reduction reaction oxygen evolution reaction zinc-air battery metal/alloy carbon sphere

The dopaminergic system and Alzheimer's disease

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Neural Regeneration Research 2025年第9期20卷 2495-2512页

作者： Yuhan Zhang yuan Liang Yixue Gu International Medical College Chongqing Medical UniversityChongqingChina College of Pharmacy Chongqing Medical UniversityChongqingChina Department of Neurology The First Affiliated Hospital of Chongqing Medical UniversityChongqing Key Laboratory of NeurologyChongqingChina

Alzheimer's disease is a common neurodegenerative disorder in older *** its prevalence,its pathogenesis remains unclea *** addition to the most widely accepted causes,which in clude excessive amyloid-beta aggregation,tau hyperphosphorylation,and deficiency of the neurotransmitter acetylcholine,numerous studies have shown that the dopaminergic system is also closely associated with the occurrence and development of this *** is a crucial catecholaminergic neurotransmitter in the human ***-associated treatments,such as drugs that target dopamine receptor D and dopamine analogs,can improve cognitive function and alleviate psychiatric symptoms as well as ameliorate other clinical *** r,therapeutics targeting the dopaminergic system are associated with various adverse reactions,such as addiction and exacerbation of cognitive *** review summarizes the role of the dopaminergic system in the pathology of Alzheimer's disease,focusing on currently available dopamine-based therapies for this disorder and the common side effects associated with dopamine-related *** aim of this review is to provide insights into the potential connections between the dopaminergic system and Alzheimer's disease,thus helping to clarify the mechanisms underlying the condition and exploring more effective therapeutic options.

关键词： adverse drug reaction Alzheimer's disease catecholamine dopamine receptor dopamine receptor heterodimers dopaminergic system neurodegenerative disease neurotransmitter signaling pathways traditional Chinese medicine treatment

Sex differences in aging and injured brain

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Neural Regeneration Research 2025年第10期20卷 2901-2902页

作者： Jordan N.Williamson yuan Yang University of Illinois Urbana-Champaign Grainger College of EngineeringDepartment of BioengineeringUrbanaILUSA Carle Foundation Hospital Stephenson Family Clinical Research InstituteClinical Imaging Research CenterUrbanaILUSA University of Illinois Urbana-Champaign Beckman Institute for Advanced Science and TechnologyUrbanaILUSA Northwestern University Department of Physical Therapy and Human Movement SciencesChicagoILUSA

Background:The prevalence,age of onset,and symptomatology of traumatic brain injury,stroke,and neurodegenerative diseases(such as Alzheimer’s disease(AD),Parkinson’s disease,amyotrophic lateral sclerosis,and Huntington’s disease)differ substantially between males and *** higher prevalence of these brain disorders has been attributed to females having a greater longevity compared with *** one of the greatest risk factors of acquired brain injury(such as stroke,traumatic brain injury caused by fall)and neurodegenerative disease is age.

关键词： Huntington prevalence traumatic

Peripheral mitochondrial DNA as a neuroinflammatory biomarker for major depressive disorder

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Neural Regeneration Research 2025年第6期20卷 1541-1554页

作者： Jinmei Ye Cong Duan Jiaxin Han Jinrong Chen Ning Sun yuan Li Tifei yuan Daihui Peng Division of Mood Disorder Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Department of Psychiatry First Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Shanghai Key Laboratory of Psychotic Disorders Brain Health InstituteNational Center for Mental DisordersShanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Co-Innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina

In the pathogenesis of major depressive disorder, chronic stress-related neuroinflammation hinders favorable prognosis and antidepressant response. Mitochondrial DNA may be an inflammatory trigger, after its release from stress-induced dysfunctional central nervous system mitochondria into peripheral circulation. This evidence supports the potential use of peripheral mitochondrial DNA as a neuroinflammatory biomarker for the diagnosis and treatment of major depressive disorder. Herein, we critically review the neuroinflammation theory in major depressive disorder, providing compelling evidence that mitochondrial DNA release acts as a critical biological substrate, and that it constitutes the neuroinflammatory disease pathway. After its release, mitochondrial DNA can be carried in the exosomes and transported to extracellular spaces in the central nervous system and peripheral circulation. Detectable exosomes render encaged mitochondrial DNA relatively stable. This mitochondrial DNA in peripheral circulation can thus be directly detected in clinical practice. These characteristics illustrate the potential for mitochondrial DNA to serve as an innovative clinical biomarker and molecular treatment target for major depressive disorder. This review also highlights the future potential value of clinical applications combining mitochondrial DNA with a panel of other biomarkers, to improve diagnostic precision in major depressive disorder.

关键词： biomarker cytokine exosomes inflammasome major depressive disorder microglia mitochondrial DNA mitochondrial dysfunction neuroinflammation Toll-like receptor

Decision making module based on stochastic magnetic tunnel junctions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 202-209页

作者： Yifan Miao Li Zhao Yajun Zhang Zhe yuan Center for Advanced Quantum Studies and Department of Physics Beijing Normal University Institute for Nanoelectric Devices and Quantum Computing Fudan University Interdisciplinary Center for Theoretical Physics and Information Sciences Fudan University

In biological neural systems, noise is ubiquitous but does not affect the correct decisions made in the complex cognitive ***-making in biological neural system is typically achieved by accumulating input information over a period of *** by recent developments in neurosciences, we design a decision-making module based on spintronic devices, utilizing superparamagnetic tunnel junctions as artificial neurons. The feasibility of this decision-making module is verified through circuit simulations. Taking a multi-layer perceptron as an example, the module significantly improves the accuracy of the perceptron in the handwritten digit recognition task. Furthermore, the spintronic decision-making module offers advantages over the conventional pooling methods, such as adaptive decision time, high performance and the absence of analog-to-digital conversion. The decision-making module is flexible to be integrated into artificial neural networks and provides a general yet effective solution to enhance performance against device noise.

关键词： neuromorphic computing spintronics magnetic tunnel junction neural networks

Correlation between the rock mass properties and maximum horizontal stress:A case study of overcoring stress measurements

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 39-48页

作者： Peng Li Meifeng Cai Shengjun Miao yuan Li Yu Wang Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China

Understanding the mechanical properties of the lithologies is crucial to accurately determine the horizontal stress *** investigate the correlation between the rock mass properties and maximum horizontal stress,the three-dimensional(3D)stress tensors at 89 measuring points determined using an improved overcoring technique in nine mines in China were adopted,a newly defined characteristic parameter C_(ERP)was proposed as an indicator for evaluating the structural properties of rock masses,and a fuzzy relation matrix was established using the information distribution *** results indicate that both the vertical stress and horizontal stress exhibit a good linear growth relationship with *** is no remarkable correlation between the elastic modulus,Poisson's ratio and depth,and the distribution of data points is scattered and ***,there is no obvious relationship between the rock quality designation(RQD)and *** maximum horizontal stress σ_(H) is a function of rock properties,showing a certain linear relationship with the C_(ERP)at the same *** addition,the overall change trend of σ_(H) determined by the established fuzzy identification method is to increase with the increase of C_(ERP).The fuzzy identification method also demonstrates a relatively detailed local relationship betweenσ_H and C_(ERP),and the predicted curve rises in a fluctuating way,which is in accord well with the measured stress data.

关键词： overcoring stress measurements elastic modulus Poisson's ratio rock quality designation maximum horizontal stress fuzzy identification