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Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai Li Zhen Ma jin-hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

Impact of psychosocial stress on airway inflammation and its mechanism in a mUrine model of allergic asthma

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Chinese Medical Journal 2013年第2期126卷 325-334页

作者： LI Bei DUAN Xiao-hong WU jin-feng LIU Bao-jun LUO qing-li jin hua-liang DU Yi-jie ZHANG Hong-ying CAO Yu-xue DONG jing-cheng Department of Integrative Medicine Huashan Hospital FudanUniversity Shanghai 200040 China

Background It has already been recognized that psychosocial stress evokes asthma exacerbation; however, the mechanism of how stress gets inside the body is not clear. This study aimed to observe the impact of psychosocial stress on airway inflammation and its mechanism in the ovalbumin-induced asthmatic mice combined with social disruption stress. Methods Thirty-six male BALB/c mice were randomly divided into： control group, asthma group （ovalbumin-induced）, asthma plus social disruption stress group （SDR）, and SDR group. The open field video tracking system was used to assess animal behaviors. The invasive pulmonary resistance （RL） and dynamic lung compliance （cdyn） test system from Buxco was applied to detect pulmonary function. The enzyme-linked immunosorbent assay （ELISA） was utilized to determine OVA-IgE, T-helper type 2 （Th2） cytokines （IL-4, IL-5, IL-13） and corticosterone in mouse serum, the Th2 cytokines （IL-4, IL-5, IL-13, IL-6, TNF-a） in bronchoalveolar lavage fluid （BALF）, and IL-6 and TNF-a levels in the supernatant of splenocytes cultured in vitro. Hematoxylin-eosin （H＆E） staining was used to assess airway inflammation in lung histology. The cell count kit-8 assay （CCK-8） was applied to evaluate the inhibitory effect of corticosterone on splenocyte proliferation induced by lipopolysacchadde （LPS）. Real time-PCR and Western blotting were utilized to determine glucocorticoid receptor （GR） mRNA and GR protein expression in lungs. Results The open field test showed that combined allergen exposure and repeated stress significantly shortened the time the mice spent in the center of the open field （P 〈0.01）, increased ambulatory activity （P 〈0.01） and the count of fecal boli （P 〈0.01）, but deceased vertical activity （P 〈0.01）. Results from pulmonary function demonstrated that airway hyperresponsiveness （AHR） was enhanced by psychosocial stress compared with allergy exposure alone. The ELISA results showed that cytokines in serum and BALF were significantly in

关键词： psychosocial stress, asthma, glucocorticoid insensitivity glucocorticoid receptor

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5-HT and 5-HT1A receptor in the hippocampal DG region are involved in the active avoidance learning in rats

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5-HT and 5-HT1A receptor in the hippocampal DG region are in...

中国神经科学学会第十届全国学术会议

作者： Feng-Ze JIANG Shi WANG Peng WAN jing LV qing-hua jin Department of Physiology and Pathophysiology Yanbian University Medical College

Learning and memory are major functions of the high levels of the nervous system,and the association between these functions and neurotransmitter functions is of great interest for understanding brain ***（5-HT） is a classical neurotransmitter,and serotonergic pathways play an important role in the modulation of learning and memory,but the importance of its receptor types and subtypes on learning and memory is still *** the5-HT receptors subtypes,5-HT1A receptors are of special interest because these receptors are present in the brain areas involved in learning and memory such as *** present study was therefore designed to investigate the effect of activation and blockade of 5-HT1A receptor on learning and memory in rats using shuttle ***,the extracellular concentrations of 5-HT in the hippocampal DG region were measured by in vivo microdialyais technique during the active avoidance task in conscious ***,WAY-100635（an antagonist of 5-HT1A receptor） and8-OH-DPAT（an agonist of 5-HT1A receptor） were locally microinjected into the hippocampal DG region before the avoidance training,and then the rate of avoidance was observed.

关键词： hippocampal DG region 5-HT 5-HT1 receptor active avoidance learning conscious rats in vivo microdialysis

NOS inhibition in the dendate gyrus improves the impairment of spatial learning and memory in AD model rats

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NOS inhibition in the dendate gyrus improves the impairment ...

中国神经科学学会第十二届全国学术会议

作者： Ling CHEN Wei-Yao WANG Xue-Ling YUE De-Lai QIU qing-hua jin Department of Physiology and Pathophysiology Yanbian University College of Medicine and Cellular Function Research Center Yanbian University

Objective To investigate the effect of L-NMMA, an inhibitor of nitric oxide synthase（NOS）, in the hippocampal dentate gyrus（DG） on spatial learning and memory in a rat model of Alzheimer’s disease（AD）. Methods AD model was prepared by ovariectomy combined with intraperitoneal injection of D-galactose. The spatial learning and memory abilities of rats were assessed by Morris water maze（MWM）;the extracellular level of Glu and amplitude of f EPSP in the DG were determined by in vivo microdialysis, HPLC and electrophysiological recording. Results（1） Microinjection of LNMMA into the DG improved the impairment of spatial learning and memory in AD rats.（2） In sham and AD+L-NMMA groups, the concentrations of Glu were significantly increased on the 2 nd and 3 th days of MWM test, and then returned to before-training levels;but in AD group, Glu levels were significantly increased throughout the MWM test period.（3） In sham and AD+L-NMMA groups, the f EPSP amplitudes of DG were significantly increased from the 2 nd to the 5 th days;in AD group, fEPSP amplitude only slightly increased on the 2 nd day. Conclusion Inhibition of NOS in the hippocampal DG improves the spatial learning and memory impairment in AD rats, in part by recovering the responses of Glu and synaptic efficiency in the DG during spatial learning.

关键词： NOS dentate gyrus glutamate AD rats Morris Water Maze synaptic efficiency

Effect of amino acids in the paraventricular nucleus on regulation of baroreflex in conscious rats

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Effect of amino acids in the paraventricular nucleus on regu...

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： qing-hua jin~* Yan-hua BING Gui-Dong YIN Xiao-Lei GAO Department of Physiology Yanbian University College of Medicine Yanji 133000 China

＜正＞Objective The paraventricular nuclues of the hypothalamus（PVN） is a central site for the integration of the neuroendocrine system and the autonomic nervous system,and the PVN appears to be an important regulatory region on ***,the neurochemical mechanisms in the PVN that are responsible for the regulation of baroreflex have not been fully ***,the objective of this study is to investigate the possible involvement of several amino acids of the PVN on regulation of baroreflex in freely moving conscious *** Baroreflex was induced by intravenous injection of phenylephrine,then the extracellular concentrations of several amino acids including glutamate （Glu）,asparate（Asp）,GABA and glycine（Gly） in the PVN region were measured by microdialysis and high performance liquid chromatography（HPLC） techniques in conscious rats,and the blood pressure（BP） and heart rate（HR） were recorded ***,the antagonists or agonists of the amino acids were directly perfused in the PVN region during baroreflex,then the sensitivity of baroreflex was *** Our results suggest that the excitatory amino acids including glutamate and asparate produce an inhibitory effect on baroreflex,whereas the inhibitory amino acids including GABA and glycine produce a facilitative effect on baroreflex.

关键词： PVN amino acids baroreflex microdialysis conscious rats

Facilitative effect of GABA on regulation of baroreflex in the hypothalamic PVN region in conscious rats

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Facilitative effect of GABA on regulation of baroreflex in t...

中国生理学会第23届全国会员代表大会暨生理学学术大会

作者： Yan-hua BING,Hao FENG,Shi WANG,Nan-Shou YU,qing-hua jin~* Department of Physiology,Yanbian University Medical College,Yanji 133000,China

The hypothalamic paraventricular nucleus(PVN) is a central site for the integration of the neuroendocrine system and the autonomic nervous system,and the PVN appears to be an important regulatory region on *** some studies indicate that y-aminobutyric acid(GABA) neurons and its receptors exist in the PVN,the effects of GABA on regulation of baroreflex in the PVN remain to be ***,to investigate the possible involvement of GABA in the central regulation of baroreflex,the extracellular concentrations of GABA in the PVN region were measured during the baroreflex induced by *** in conscious *** extracellular levels of GABA in the PVN region showed an immediate increase during ***,to determine whether the observed GABA release was involved in the baroreflex,bicuculline(an antagonist of GABA receptor) and salcofen(an antagonist of GABA receptor) were perfused in the PVN region during *** perfusion of bicuculline significantly decreased the baroreflex sensitivity,whereas saclofen did not influence the sensitivity. In addition,perfusion of muscimol(an agonist of GABA receptor) in the PVN region significantly increased the baroreflex sensitivity,whereas baclofen(an agonist of GABA receptor) did not affect the *** results suggest that *** elicits a local release of GABA in the PVN region,which may act via GABA receptor to produce a facilitative effect on the baroreflex.

关键词： PVN baroreflex GABA conscious rats phenylephrine

Effect of NO on the learning-dependent LTP in hippocampal DG region in conscious rats

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Effect of NO on the learning-dependent LTP in hippocampal DG...

中国生理学会第23届全国会员代表大会暨生理学学术大会

作者： Shi WANG,De-Xi PAN,Yan-hua BING,Nan-Shou YU,qing-hua jin~* Department of Physiology,Yanbian University Medical College,Yanji 133000,China

＜正＞Hippocampus is one of the key structures for learning and memory in mammals,and long-term potentiation （LTP） is an important mechanism responsible for the learning and *** a number of in vitro studies indicate that nitric oxide（NO） is involved in the formation and maintenance of LTP as a retrograde messenger, little is considered using a neurotransmitter release as a visual indicator in awake animal to explore the effects of ***,to investigate the effects of NO in the learning-dependent LTP,the effects of L-NMMA（an inhibitor of NO synthase） and SNP（a NO donor） on extracellular levels of Glutamate（Glu） were measured in hippocampal dentate gyrus（DG） region during the period of establishment and extinction of the conditioned reflex in conscious *** the control group,the extracellular concentration of Glu in the DG region was significantly increased during the establishment of conditioned reflex and gradually returned following the extinction of conditioned reflex. In experimental group,the change of Glu concentration was significantly reduced by local-microinjection of LNMMA, as well as the establishment of conditioned reflex was significantly inhibited;whereas,the change of Glu was significantly enhanced by SNP,as well as the establishment of conditioned reflex was significantly accelerated. Our results suggest that NO is involved in the formation and maintenance of learning-dependent LTP,which may be via enhancing the presynaptic release of Glu in hippocampal DG region.

关键词： learning-dependent LTP nitric oxide hippocampal DG region L-NMMA SNP

Possible involvement of amino acids in the central regulation of cardiovascular responses in conscious rats

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Possible involvement of amino acids in the central regulatio...

中国神经科学学会第四次会员代表大会暨第七届全国学术会议

作者： qing-hua jin,Gui-Yu CUI,Xian-Shu SHEN,Yan JIANG,Yan-hua BING,Xiao-Lei GAO,Gui-Dong YIN Department of Physiology,Yanbian University College of Medicine,Yanji 133000,China

＜正＞The paraventricular nuclues of the hypothalamus（PVN） is a central site for the integration of the neuroendocrine system and the autonomic nervous *** PVN appears to be an important regulatory region of the hypothalamus that plays a critical role in the regulation of cardiovascular ***,the neurochemical mechanisms in the PVN that are responsible for the regulation of cardiaovascular responses have not been fully ***,in the present study,we use microdialysis,microinjection and high-performance liquid chromatography technique to investigate the possible involvement of several amino acids of the PVN on cardiovascular responses in freely moving conscious rats. The results will contribute to clarify the central mechanism of the cardiaovascular regulation.

关键词： PVN amino acids cardiovascular responses microdialysis conscious rats

(Ag_(0.9)Na_(0.1))(Nb_(0.6)Ta_(0.4))O_3纳米粉体结构与介电性能

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天津大学学报（自然科学与工程技术版） 2004年第11期37卷 1018-1021页

作者：宋宽秀严玉清李金花王建萍天津大学理学院天津300072

针对微波介质瓷料系统成瓷过程中介电损耗较大且成瓷温度较高的问题,采用湿化学法制备(Ag0.9Na0.1)(Nb0.6Ta0.4)O3粉体,并采用XRD、IR和TEM等分析方法进行表征.结果表明,800℃灼烧3h所得晶体为三方晶系,平均粒径为34nm.采用这种瓷粉在1... 详细信息

针对微波介质瓷料系统成瓷过程中介电损耗较大且成瓷温度较高的问题,采用湿化学法制备(Ag0.9Na0.1)(Nb0.6Ta0.4)O3粉体,并采用XRD、IR和TEM等分析方法进行表征.结果表明,800℃灼烧3h所得晶体为三方晶系,平均粒径为34nm.采用这种瓷粉在1060℃制得的瓷件,介电常数ε=508,介电损耗tanδ=4.6×10-4,温度系数αc=-440×10-6/℃,电阻率ρv>1012Ω·cm;当Nb∶Ta=0.7∶0.3,成瓷温度为950℃时,即可获得NPO温度特性.瓷件的介电性能优于固相法,且成瓷温度下降.

关键词：湿化学法纳米粉体介电性能

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