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Application and exploration of fNIRS in brain function mechanism of acupuncture against insomnia: fNIRS 认领 引用
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作者 Yu-juan YE Bao-jin WANG +1 位作者 LI CHEN Xing-ke YAN 《World Journal of Acupuncture-Moxibustion》 CAS CSCD 2026年第1期84-88,共5页
Functional near-infrared spectroscopy (fNIRS) is predominantly employed to investigate the atypical response characteristics of the cerebral cortex in neurological disorders. Recently, this technology has been applied... Functional near-infrared spectroscopy (fNIRS) is predominantly employed to investigate the atypical response characteristics of the cerebral cortex in neurological disorders. Recently, this technology has been applied to examine the neural mechanisms underlying the use of acupuncture in the treatment of insomnia. This article provides a comprehensive review and analysis of the current applications of fNIRS in the contexts of sleep-wake cycles, insomnia, and acupuncture-based interventions for insomnia. The findings indicate that existing research predominantly focuses on the prefrontal cortex, with limited studies addressing the temporal, occipital, and parietal lobes. fNIRS can be integrated with various data analysis methodologies or multimodal brain functional imaging techniques to investigate the regulatory effects of acupuncture on functional connectivity both among and within brain regions, as well as on the efficiency of information transmission. This approach may elucidate the neural mechanisms of acupuncture in combating insomnia from diverse perspectives and offer an enhanced framework for the diagnosis and treatment of insomnia. 展开更多
关键词 fNIRS Acupuncture Insomnia Mechanisms of brain function
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Genome-wide identification of SmJAZ gene family in eggplant and functional mechanism analysis of SmJAZ9 modulating high temperature and darkness stress-regulated anthocyanin biosynthesis 认领 引用 被引量：2
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作者 Yue Wang Hong Wang +5 位作者 Yu Xin Mingyue Yuan Tuo Ji Duanyin Gu Fengjuan Yang Jing Li 《Vegetable Research》 2025年第1期314-323,共10页
The biosynthesis of anthocyanin in plants is regulated by temperature,light,jasmonic acid(JA),among others.JASMONATE ZIM-DOMAIN(JAZ)proteins are critical repressors of the jasmonic acid(JA)pathway,the role of JAZ prot... The biosynthesis of anthocyanin in plants is regulated by temperature,light,jasmonic acid(JA),among others.JASMONATE ZIM-DOMAIN(JAZ)proteins are critical repressors of the jasmonic acid(JA)pathway,the role of JAZ proteins on anthocyanin biosynthesis under high-temperature or dark conditions remains unexplored.Here,we identified 16 SmJAZ genes in eggplant and characterized their evolutionary relationships,gene structures,and hightemperature(HT)and darkness stress-responsive expression patterns.Both the HT and darkness treatments significantly inhibit anthocyanin biosynthesis in eggplant peel.Correlation analysis revealed that the SmJAZ9 expression strongly correlated with anthocyanin biosynthesis-related genes under HT and darkness conditions.Transient expression assay in eggplant peels demonstrated that nuclear-localized SmJAZ9 is a positive regulator,enhancing anthocyanin biosynthesis via interaction with the transcription factor SmMYB113,thereby promoting SmCHS and SmDFR transcription.Additionally,SmJAZ9 interacted with SmMYC2 but not SmCOI1,suggesting a JA signaling-independent regulatory mechanism under HT and darkness conditions.This study revealed a novel JAZ-mediated regulatory module integrating JA signaling,environmental stress responses,and anthocyanin biosynthesis,providing potential targets for improving eggplant fruit quality. 展开更多
关键词 smjaz genes functional mechanism analysis jaz proteins genome wide identification smjaz gene family eggplant smjaz high temperature
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High entropy nanomaterials for zero-emission energy systems:Advanced structural design,catalytic performance and functional mechanisms 认领 引用
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作者 Zibo Zhai Yan-Jie Wang +2 位作者 Dan Liu Biao Wang Baizeng Fang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第8期512-532,共21页
High entropy materials(HEMs)are the promising electrocatalysts for anion exchange membrane electrolyser(AEMs)and proton exchange membrane fuel cells(PEMFCs)due to the intriguing cocktail effect,wide design space,tailo... High entropy materials(HEMs)are the promising electrocatalysts for anion exchange membrane electrolyser(AEMs)and proton exchange membrane fuel cells(PEMFCs)due to the intriguing cocktail effect,wide design space,tailorable electronic structure,and entropy stabilization effect.The precise fabrication of HEMs with functional nanostructures provides a crucial avenue to optimize the adsorption strength and catalytic activity for electrocatalysis.This review comprehensively summarizes the development of HEMs,focusing on the principles and strategies of structural design,and the catalytic mechanism towards hydrogen evolution reaction,oxygen evolution reaction and oxygen reduction reaction for the development of high-performance electrocatalysts.The complexity inherent in the interactions between different elements,the changes in the d-band center and the Gibbs free energies during the catalytic progress,as well as the coordination environment of the active sites associated with the unique crystal structure to improve the catalytic performance are discussed.We also provide a perspective on the challenges and future development direction of HEMs in electrocatalysis.This review will contribute to the design and development of HEMs-based catalysts for the next generation of electrochemical applications. 展开更多
关键词 High entropy materials Structural design Electrocatalytic performance Functional mechanism
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Modernization of traditional Chinese medicine in cancer therapy:“3 D”innovative Chinese medicine 认领 引用
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作者 Hui Liu Yunxiao Ge Zigang Dong 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2026年第2期189-202,共14页
Traditional Chinese medicine(TCM)has garnered increasing attention globally,with its modernization becoming a prominent research focus both within China and internationally.However,the lack of a precise definition for... Traditional Chinese medicine(TCM)has garnered increasing attention globally,with its modernization becoming a prominent research focus both within China and internationally.However,the lack of a precise definition for TCM modernization has hindered clear guidance for its development.Additionally,cancer remains a significant global public health challenge,largely untreatable with current methods.Therefore,a comprehensive understanding of TCM modernization is crucial for its evolution,revolution,drug discovery,and cancer therapy.This study provides an overview of the history,theory,characteristics,and evolution of TCM,highlighting its potential in cancer prevention and treatment.We propose a definition for TCM modernization,innovative Chinese medicine(ICM),and elucidate strategies to elevate TCM from a supporting role to a leading one.Electronic databases such as PubMed,Web of Science,ScienceDirect,and Clinical Trials were utilized to retrieve relevant literature spanning from 1979 to 2024,with most publications being from the last five years,using keywords like“Traditional Chinese medicine”,“Cancer”,“Mechanism”,and“Clinical trial”.In this study,we introduce the theory of TCM modernization following target identification and initial compound screening:ICM,defined by“3 D”elements:definite active ingredient composition and content,determined functional mechanism,and detection through evidence-based medicine.Overall,the“3 D”definition of ICM will establish a standard for ICM,accelerate TCM modernization,enhance drug discovery targeting cancer and various human diseases,and benefit patients worldwide. 展开更多
关键词 Traditional Chinese medicine Innovative Chinese medicine Definite active ingredient composition and content Determined functional mechanism Detection through evidence-based medicine Cancer therapy Drug discovery
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Structure insight into FtsZ function maintaining under acid stress of Streptococcus mutans 认领 引用
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作者 Yuxing Chen Yongliang Li +9 位作者 Jiahao Niu Liuchang Yang Yaqi Chi Xue Cai Fengjiao Xin Jie Zhang Xianyang Fang Yiqin Gao Manas Mondal Xiaoyan Wang 《International Journal of Oral Science》 SCIE CAS CSCD 2026年第1期90-102,共13页
Understanding the acid resistance mechanism of S.mutans is crucial for preventing dental caries.FtsZ is the core protein for cell division in bacteria that can polymerize into Z-rings and drive cytokinesis.Our previou... Understanding the acid resistance mechanism of S.mutans is crucial for preventing dental caries.FtsZ is the core protein for cell division in bacteria that can polymerize into Z-rings and drive cytokinesis.Our previous study revealed that the FtsZ in S.mutans(SmFtsZ) has higher self-assembly and GTPase activity under acidic stress,which may be responsible for acid resistance and ca riogenesis of S.mutans.However,the functional structure mechanism of SmFtsZ under low pH conditions is still unclear.Here,we further reported the crystal structure of S.mutans FtsZ,revealing a unique lateral interface.Through protein polymerization and GTPase activity assay,we experimentally demonstrated that the mutation of Arg68 on this lateral interface significantly reduced the functional activity of FtsZ in an acidic environment.The phenotype assay and rat caries model further showed that the mutation of Arg68 effectively inhibited the acid resistance of S.mutans and the occurrence and progress of dental caries in vivo.By employing a molecular dynamics simulation analysis,we conclude that the mutation of Arg68 disrupts the conformation change necessary for SmFtsZ polymerization under acidic conditions.Our study proposes a novel mechanism to maintain FtsZ function in bacteria and could be a potential target for antimicrobial drugs to inhibit the growth of S.mutans in acidic environments. 展开更多
关键词 ca riogenesis FtsZ acid resistance dental cariesftsz acidic stress cell division functional structure mechanism low ph conditions
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The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH 认领 引用 被引量：10
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作者 鲍丽 张廷安 +5 位作者 刘燕 豆志河 吕国志 王晓民 马佳 蒋孝丽 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2010年第4期630-634,共5页
Determination of probable mechanism function and kinetic parameters is important to hydrometallurgical kinetics.In this work,the most probable mechanism function and kinetic parameters of gibbsite dissolution in NaOH ... Determination of probable mechanism function and kinetic parameters is important to hydrometallurgical kinetics.In this work,the most probable mechanism function and kinetic parameters of gibbsite dissolution in NaOH solution are studied.The sample,the mixture of synthetic gibbsite and sodium hydroxide solution,was scanned in high-pressure differential scanning calorimetry(DSC) equipment with the heating rate of 10 K·min-1. Integral equation and differential equation of non-isothermal kinetics were solved to fit the data related to DSC curve.According to the calculation results,the most probable mechanism function for pure synthetic gibbsite dissolution in sodium hydroxide solution is presented based on the optimum procedure in the database of the mechanism function.The apparent activation energy obtained is(75±1) kJ·mol-1,the frequency factor is 10 8±1mol·s-1,and the reaction is a second order reaction. 展开更多
关键词 gibbsite kinetic parameter mechanism function integral equation differential equation
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Effect and function mechanism of sinter basicity on softening-melting behaviors of mixed burden made from chromium-bearing vanadium-titanium magnetite 认领 引用 被引量：4
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作者 王宏涛 赵伟 +3 位作者 储满生 汪燃 柳政根 薛向欣 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第1期39-47,共9页
The effect of sinter basicity on softening-melting behaviors of mixed burden made from chromium-bearing vanadium-titanium magnetite(Cr-V-Ti magnetite) was investigated and the function mechanism was simultaneously ana... The effect of sinter basicity on softening-melting behaviors of mixed burden made from chromium-bearing vanadium-titanium magnetite(Cr-V-Ti magnetite) was investigated and the function mechanism was simultaneously analyzed.The results show that with increasing sinter basicity from 1.71 to 2.36,the softening interval tends to increase from 149.3 ℃ to 181.7 ℃while the melting interval tends to decrease from 178.0 ℃ to 136.7 ℃.The location of cohesive zone moves downwards firstly and then ascends slightly,but the cohesive zone becomes thinner.The softening-melting characteristic value becomes small,which indicates that the permeability of burden column is improved.The dripping ratio of mixed burden tends to increase firstly and then decrease,which comes to the highest value of 74.50%when the sinter basicity is 2.13.The content and the recovery of V and Cr in dripping iron are all increased.The generation amount of components with high melting point in slag becomes little with the increase of sinter basicity,which could improve the permeability of mixed burden.Taking softening-melting behaviors of mixed burden and recovery of valuable elements into account,the proper sinter basicity is no less than 2.13 for smelting mixed burden made from Cr-V-Ti magnetite in blast furnace. 展开更多
关键词 blast furnace sinter basicity Cr-V-Ti magnetite softening-melting behaviors cohesive zone function mechanism
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Mechanism progress of acupuncture and moxibustion for chronic prostatitis 认领 引用 被引量：8
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作者 Zhi-hao LI Jun-wei HU +1 位作者 Xu LI Yue-lai CHEN 《World Journal of Acupuncture-Moxibustion》 CAS CSCD 2021年第4期309-313,共5页
The effect of acupuncture and moxibustion in the treatment of chronic prostatitis/chronic pelvic pain syndrome(CP/CPPS) is definite,and progress has been made in the studies of its functional mechanism.This paper disc... The effect of acupuncture and moxibustion in the treatment of chronic prostatitis/chronic pelvic pain syndrome(CP/CPPS) is definite,and progress has been made in the studies of its functional mechanism.This paper discusses the related studies on the mechanism of acupuncture and moxibustion in the treatment of CP/CPPS from five aspects:regulating immunity,anti-oxidative stress,regulating neural functions,improving urodynamics,and regulating blood circulation.It is found that acupuncture and moxibustion can decrease the level of pro-inflammatory factors,increase the level of anti-inflammatory factors,and regulate the level of inflammatory regulatory factors,thus to regulate immunity.Acupuncture and moxibustion can improve the body’s ability of anti-oxidative stress,regulate the balance state of oxidation and anti-oxidation,thus to relieve tissue damage,and regulate neural functions by modulating neurotransmitters and autonomic nerves.Acupuncture and moxibustion can improve urodynamics and relieve abnormal urination symptoms by regulating the contraction of pelvic floor muscles,can also promote blood circulation to treat the pelvic congestion.It is expected that this paper can provide reference for the clinical application and research of acupuncture and moxibustion for CP/CPPS. 展开更多
关键词 Acupuncture and moxibustion Chronic prostatitis(CP) Chronic pelvic pain syndrome(CPPS) Anti-oxidative stress Inflammatory factors Urodynamics Functional mechanism
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Influence of oxygen-rich hot air composite gas medium on sintering performance and function mechanism 认领 引用 被引量：2
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作者 Min Gan Hao-xiang Zheng +9 位作者 Xiao-hui Fan Zhi-yun Ji Qiang Li Ming Wu Yi-fan Wang Xiao-long Wang Yu-feng Wu Xu-ling Chen Zeng-qing Sun Xiao-xian Huang 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2024年第5期1071-1081,共11页
Hot air sintering technology is used to improve the quality and production efficiency of sintered ore.However,the current thick layer condition highlights the disadvantage of the low oxygen potential of the hot air si... Hot air sintering technology is used to improve the quality and production efficiency of sintered ore.However,the current thick layer condition highlights the disadvantage of the low oxygen potential of the hot air sintering layer.Therefore,it is considered to use oxygen enrichment sintering to improve the environment of hot air sintering.Traditional sintering,hot air sintering,and oxygen-rich hot air sintering were compared through sintering cup experiments,and the influence of hot air and oxygen-rich hot air on sintering indexes was clarified.Hot air reduced the vertical sintering velocity,while improved the yield and tumbler index.Oxygen-rich hot air sintering contributed to improving the vertical sintering velocity while ensuring the quality of sintered ore,thus comprehensively improving production efficiency.Under the action of hot air,the highest temperature of the sintering layer increased and the high-temperature holding time was prolonged.After oxygen enrichment,the combustion efficiency of fuels in the upper layer of materials was promoted,which optimized heat distribution in the middle and lower layers of materials and increased the content of calcium ferrite in the sintered ore,thus strengthening the sintering process. 展开更多
关键词 Iron ore sintering Hot air sintering Oxygen enrichment Function mechanism
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Mechanism and Active Variety of Allelochemicals 认领 引用 被引量：30
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作者 PENG Shao-Lin WEN Jun GUO Qin-Feng 《Acta Botanica Sinica》 2004年第7期757-766,共10页
This article summarizes allelochemicals'active variety,its potential causes and function mechanisms.Allelochemicals'activity varies with temperature,photoperiod,water and soils during natural processes,with it... This article summarizes allelochemicals'active variety,its potential causes and function mechanisms.Allelochemicals'activity varies with temperature,photoperiod,water and soils during natural processes,with its initial concentration,compound structure and mixed degree during functional processes,with plant accessions,tissues and maturity within-species,and with research techniques and operation processes.The prospective developmental aspects of allelopathy studies in the future are discussed.Future research should focus on:(1)to identify and purify allelochemicals more effectively,especially for agriculture,(2)the functions of allelopathy at the molecular structure level,(3)using allelopathy to explain plant species interactions,(4)allelopathy as a driving force of succession,and(5)the significance of allelopathy in the evolutionary processes. 展开更多
关键词 allelopathy active variety functional mechanism
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Functional mechanism of Pingchuanning Decoction on adjustment of clara cell secretory protein in airway remodeling of asthmatic rats 认领 引用 被引量：5
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作者 方向明 李俊 +1 位作者 李泽庚 董小波 《Journal of Traditional Chinese Medicine》 SCIE CSCD 2012年第2期215-221,共7页
OBJECTIVE:To study the functional mechanism of Pingchuanning Decoction in treatment of airway remodeling in asthmatic rats.METHODS:Eighty healthy Wistar male rats were randomized into eight groups(n=10 rats each):Norm... OBJECTIVE:To study the functional mechanism of Pingchuanning Decoction in treatment of airway remodeling in asthmatic rats.METHODS:Eighty healthy Wistar male rats were randomized into eight groups(n=10 rats each):Normal group,Asthma model group,Dexamethasone group,Guilong Kechuanning group,Xiaoqinglong Decoction group,and Pingchuanning Decoction low-,middle-,and high-dose groups.The rats of all but the Normal group were made into asthma models through intraperitoneal injection and aerosol inhalation of ovalbumin.All treatments were administered at the first stimulation of asthma onset(third week of modeling),and the rats were killed after stimulating asthma attacks for 4 weeks.The general conditions of rats and pathomorphological changes of the lung tissues were observed.The expression of nerve growth factor(NGF) of the lung tissues was measured with immunohistochemical methods,and the content of Clara cell secretory protein(CCSP) mRNA was determined with RT-PCR.RESULTS:Compared with the Normal group,the contents of NGF and CCSP mRNA in the lung tissues of the Model group were significantly changed(P<0.01).Compared with the Model group,the indices of Pingchuanning Decoction and other treatment groups were improved to some extent(P<0.05 or P<0.01).CONCLUSIONS:Pathological changes of airway inflammation and remodeling were present in these rat asthma models.Pingchuanning Decoction had an intervention effect on these experimental models.Its functional mechanism may be related to multiple factors,including alleviation of airway inflammation,relief of bronchial smooth muscle spasm,and inhibition of airway remodeling. 展开更多
关键词 Pingchuanning decoction Asthma Nerve growth factor Clara cell secretory protein Functional mechanism
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Pyrolysis mechanism of glucose and mannose: The formation of 5-hydroxymethyl furfural and furfural 认领 引用 被引量：11
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作者 Bin Hu Qiang Lu +4 位作者 Xiaoyan Jiang Xiaochen Dong Minshu Cui Changqing Dong Yongping Yang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第2期486-501,共16页
Fast pyrolysis of biomass will produce various furan derivatives, among which 5-hydroxymethyl furfural（5-HMF） and furfural（FF） are usually the two most important compounds derived from holocellulose. In this study... Fast pyrolysis of biomass will produce various furan derivatives, among which 5-hydroxymethyl furfural（5-HMF） and furfural（FF） are usually the two most important compounds derived from holocellulose. In this study, density functional theory（DFT） calculations are utilized to reveal the formation mechanisms and pathways of 5-HMF and FF from two hexose units of holocellulose, i.e., glucose and mannose. In addition, fast pyrolysis experiments of glucose and mannose are conducted to substantiate the computational results, and the orientation of 5-HMF and FF is determined by 13C-labeled glucoses. Experimental results indicate that C1 provides the aldehyde group in both 5-HMF and FF, and FF is mainly derived from C1 to C5 segment. According to the computational results, glucose and mannose have similar reaction pathways to form 5-HMF and FF with d-fructose（DF） and 3-deoxy-glucosone（3-DG） as the key intermediates. 5-HMF and FF are formed via competing pathways. The formation of 5-HMF is more competitive than that of FF, leading to higher yield of 5-HMF than FF from both hexoses. In addition, compared with glucose,mannose can form 5-HMF and FF via extra pathways because of the epimerization at C2 position. Therefore, mannose pyrolysis results in higher yields of 5-HMF and FF than glucose pyrolysis. 展开更多
关键词 Pyrolysis mechanism 5-HMF FF Density functional theory ^13C isotope labeling
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Fluoridation routes,function mechanism and application of fluorinated/fluorine-doped nanocarbon-based materials for various batteries:A review 认领 引用 被引量：4
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作者 Weicui Liu Nanping Deng +5 位作者 Gang Wang Ruru Yu Xiaoxiao Wang Bowen Cheng Jingge Ju Weimin Kang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第10期363-393,I0011,共31页
With the popularity and widespread applications of electronics,higher demands are being placed on the performance of battery materials.Due to the large difference in electronegativity between fluorine and carbon atoms... With the popularity and widespread applications of electronics,higher demands are being placed on the performance of battery materials.Due to the large difference in electronegativity between fluorine and carbon atoms,doping fluorine atoms in nanocarbon-based materials is considered an effective way to improve the performance of used battery.However,there is still a blank in the systematic review of the mechanism and research progress of fluorine-doped nanostructured carbon materials in various batteries.In this review,the synthetic routes of fluorinated/fluorine-doped nanocarbon-based(CF_x)materials under different fluorine sources and the function mechanism of CF_x in various batteries are reviewed in detail.Subsequently,judging from the dependence between the structure and electrochemical performance of nanocarbon sources,the progress of CF_x based on different dimensions(0D–3D)for primary battery applications is reviewed and the balance between energy density and power density is critically discussed.In addition,the roles of CF_x materials in secondary batteries and their current applications in recent years are summarized in detail to illustrate the effect of introducing F atoms.Finally,we envisage the prospect of CF_x materials and offer some insights and recommendations to facilitate the further exploration of CF_x materials for various high-performance battery applications. 展开更多
关键词 Nanocarbon materials Fluorinated/fluorine-doped effect Function mechanism Various batteries
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Functional mechanism on stem cells by tea(Camellia sinensis)bioactive compounds 认领 引用 被引量：3
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作者 Yao Cheng Jiachen Sun +2 位作者 Hui Zhao Hongxing Guo Jianying Li 《Food Science and Human Wellness》 SCIE CAS CSCD 2022年第3期579-586,共8页
Camellia sinensis(tea),one of the most popular commercial crops,is commonly applied in all parts of the world.The main active ingredients of tea include polyphenols,alkaloids,polysaccharides,amino acids,aroma and vola... Camellia sinensis(tea),one of the most popular commercial crops,is commonly applied in all parts of the world.The main active ingredients of tea include polyphenols,alkaloids,polysaccharides,amino acids,aroma and volatile constitutes,all of which are potentially responsible for the activities of tea.Stem cells(SCs)are the immature and undifferentiated cells by a varying capacity for proliferation,self-renewal and the capability to differentiate into one or more different derivatives with specialized function or maintain their stem cell phenotype.Herein,a thorough review is conducted of the functional mechanism on SCs by tea bioactive compounds. 展开更多
关键词 Functional mechanism Stem cell Camellia sinensis Bioactive compounds
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Mechanism of trifluoromethylation reactions with well-defined NHC copper trifluoromethyl complexes and iodobenzene:A computational exploration 认领 引用 被引量：1
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作者 Dong-Hai Yu Jing-Na Shao +1 位作者 Rong-Xing He Ming Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2015年第5期564-566,共3页
Computational calculation was performed to investigate the mechanism of trifluoromethylation reactions of iodobenzene with well-defined N-heterocyclic carbene （NHC）-supported Cu~ trifiuor- omethyl complexes. Four pr... Computational calculation was performed to investigate the mechanism of trifluoromethylation reactions of iodobenzene with well-defined N-heterocyclic carbene （NHC）-supported Cu~ trifiuor- omethyl complexes. Four proposed reaction pathways, namely cr-bond metathesis （BM）, concerted oxidative addition-reductive elimination （OARE）, iodine atom transfer （IAT） and single-electron transfer （SET）, have been computed by density functional theory （DFT）. The result indicated that the concerted OARE mechanism is favored among the four reaction pathways, suggesting the trifluoromethylation may occur via concerted OARE mechanism involving Ar-X oxidative addition to the Cu（1） center as the rate determining step. 展开更多
关键词 Trifluoromethylation Mechanism Density functional theory N-Heterocyclic carhene Trifluoromethyl copper complex
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Theoretical study on the formation mechanism of polychlorinated dibenzothiophenes/thianthrenes from 2-chlorothiophenol molecules 认领 引用 被引量：2
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作者 Xiaoqing Yu Jiamin Chang +2 位作者 Xian Liu Wenxiao Pan Aiqian Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第4期318-327,共10页
Homogeneous formation of polychlorinated dibenzothiopheneshianthrenes（PCDT/TAs）,sulfurated compounds analogous to polychlorinated dibenzo-p-dioxin/dibenzofurans（PCDD/Fs）, has been well-documented to occur via radi... Homogeneous formation of polychlorinated dibenzothiopheneshianthrenes（PCDT/TAs）,sulfurated compounds analogous to polychlorinated dibenzo-p-dioxin/dibenzofurans（PCDD/Fs）, has been well-documented to occur via radical–radical coupling reactions from chlorinated thiophenol precursors. However, the current understanding of the formation mechanism of PCDT/TAs is exclusively limited to the inherent point of view that chlorothiophenoxy radicals act as the only required intermediates for PCDT/TAs. This study investigates reaction pathways for the formation of PCDT/TAs involving two new types of radical species, i.e., substituted phenyl radicals and substituted thiophenoxyl diradicals. Taking 2-chlorothiophenol（2-CTP） as a model compound for chlorothiophenols,we found that apart from the mostly discussed chlorothiophenoxy radicals, substituted phenyl radicals and substituted thiophenoxyl diradicals could also be readily formed via the reaction of 2-CTP with H radicals. Furthermore, direct self-and cross-coupling of these radicals can result in the formation of PCDT/TAs, including 1-monochlorothianthrene（1-MCTA）, 1,6-dichlorothianthrene（1,6-DCTA）, 4,6-dichlorodibenzothiophene（4,6-DCDT）and 1,6-dichlorodibenzothiophene（1,6-DCDT）. The pathways proposed in this work are proven to be both thermodynamically and kinetically favorable. Particularly, comparisons were made between the formation mechanisms of sulfurated and oxygenated dioxin systems from an energetic point view, showing that replacing oxygen with sulfur atoms greatly reduces the activation barriers of the rate-controlling steps involved in the PCDT/TA formation processes compared with those involved for PCDD/Fs. The calculated results in this work may improve our understanding of the formation mechanism of PCDT/TAs from chlorothiophenol precursors and should be informative to environmental scientists. 展开更多
关键词 Polychlorinated dibenzothiopheneshianthrenes Formation mechanism Phenyl radicals Thiophenoxyl diradicals Density functional theory study
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D* jet fragmentation function paradox and combination mechanism 认领 引用
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作者 Chuanhui Jiang Honglei Li +2 位作者 Shi-Yuan Li Shufen Liu Xinyue Yin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2023年第2期80-88,共9页
In the framework of the perturbative Quantum Chromodynamics factorization,the production of a hadron includes contributions from fragmentation as well as combination,with the latter being of higher twist.In particular... In the framework of the perturbative Quantum Chromodynamics factorization,the production of a hadron includes contributions from fragmentation as well as combination,with the latter being of higher twist.In particular,the heavy meson production can be via the combination of a heavy quark with a light one,and the cross section can be factorized to be the convolution of the combination matrix element,the light quark distribution function,and the hard partonic sub-cross section of the heavy quark production.The partonic distribution and the combination matrix element are functions of a scaling variable,respectively,which is the momentum fraction of the corresponding quark with respect to the heavy meson.We studied the D*±production in jet via combination in pp collision at the LHC.The total result is comparable with the experimental data.The combination matrix elements can be further studied in various hadron production processes. 展开更多
关键词 D*-jet,fragmentation function,combination mechanism
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Machine Learning-Based Detection and Selective Mitigation of Denial-of-Service Attacks in Wireless Sensor Networks 认领 引用
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作者 Soyoung Joo So-Hyun Park +2 位作者 Hye-Yeon Shim Ye-Sol Oh Il-Gu Lee 《Computers, Materials & Continua》 SCIE EI 2025年第2期2475-2494,共20页
As the density of wireless networks increases globally, the vulnerability of overlapped dense wireless communications to interference by hidden nodes and denial-of-service (DoS) attacks is becoming more apparent. Ther... As the density of wireless networks increases globally, the vulnerability of overlapped dense wireless communications to interference by hidden nodes and denial-of-service (DoS) attacks is becoming more apparent. There exists a gap in research on the detection and response to attacks on Medium Access Control (MAC) mechanisms themselves, which would lead to service outages between nodes. Classifying exploitation and deceptive jamming attacks on control mechanisms is particularly challengingdue to their resemblance to normal heavy communication patterns. Accordingly, this paper proposes a machine learning-based selective attack mitigation model that detects DoS attacks on wireless networks by monitoring packet log data. Based on the type of detected attack, it implements effective corresponding mitigation techniques to restore performance to nodes whose availability has been compromised. Experimental results reveal that the accuracy of the proposed model is 14% higher than that of a baseline anomaly detection model. Further, the appropriate mitigation techniques selected by the proposed system based on the attack type improve the average throughput by more than 440% compared to the case without a response. 展开更多
关键词 Distributed coordinated function mechanism jamming attack machine learning-based attack detection selective attack mitigation model selective attack mitigation model selfish attack
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Synthesis, Characterization, Thermal Decomposition Mechanism and Non-Isothermal Kinetics of Salicylaldehyde Salicylhydrazone and Its Complex of Erbium(Ⅲ) 认领 引用
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作者 吴望婷 何水样 +3 位作者 刘煜 赵宏安 胡荣祖 史启祯 《Journal of Rare Earths》 SCIE EI CAS 2004年第S1期16-20,共5页
The salicylaldehyde salicylhydrazone and its complex of Er(Ⅲ) were synthesized. The formulae K·4H_2O(HL=[C14H10N_2O_3]2-, the bivalent form of the salicylaldehyde salicylhydrazone) were determined by el... The salicylaldehyde salicylhydrazone and its complex of Er(Ⅲ) were synthesized. The formulae K·4H_2O(HL=[C14H10N_2O_3]2-, the bivalent form of the salicylaldehyde salicylhydrazone) were determined by elemental analysis and EDTA volumetric analysis. Molar conductance, IR, UV and X-ray power diffraction were carried out for the characterizations of the complex and the ligand. There are two stable five-numbered and six-numbered circles in the complex. The thermal decompositions of the ligand and the complex with the kinetic study are carried out by non-isothermal thermogravimetry. The stages of the decompositions were identified by TG-DTG curve. The non-isothermal kinetic data were analyzed by means of integral and differential methods. The possible reaction mechanism and the kinetic equation were investigated by the corresponding kinetic parameters.The activation energy value of the main step decomposition are also calculated by Kissinger′s method and Ozawa′s method. 展开更多
关键词 salicylaldehyde salicyloyhydrazone erbium(Ⅲ) complex thermal decomposition non-thermal kinetics mechanism function rare earths
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A critical review on the health promoting effects of mushrooms nutraceuticals 认领 引用 被引量：26
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作者 Gaoxing Ma Wenjian Yang +3 位作者 Liyan Zhao Fei Pei Donglu Fang Qiuhui Hu 《Food Science and Human Wellness》 SCIE CAS 2018年第2期125-133,共9页
Extensive elucidations focusing on the efficient health promoting properties and high nutritional values of mushrooms have been expanded dynamically from the past few decades.Due to its high quality of proteins,polysa... Extensive elucidations focusing on the efficient health promoting properties and high nutritional values of mushrooms have been expanded dynamically from the past few decades.Due to its high quality of proteins,polysaccharides,unsaturated fatty acids,mineral substances,triterpenes sterols and secondary metabolites,mushrooms have always been appreciated for their vital role in protecting and curing various health problems,such as immunodeficiency,cancer,inflammation,hypertension,hyperlipidemia,hypercholesterolemia and obesity.Moreover,investigations in recent years have revealed the correlations between the health-promoting benefits and gut microbiota regulating effects induced by the mushrooms intake.Researches on the immense role in the nutritional and health benefits displayed by mushrooms have become an emergent task to study.The present article overviewed and compiled the latest information correlated to the health benefits and underlying functional mechanisms of mushroom nutraceuticals,and concluded that the supplementation of mushrooms as a dietary composition could become a natural adjuvant for the prevention and treatment of several health diseases. 展开更多
关键词 Mushrooms Bioactive nutraceuticals Health benefits Functional mechanisms Gut microbiota regulation
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