检索结果-南通市图书馆

Interference properties of two-component matter wave solitons

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第2期29卷 112-120页

作者： yan-hong qin Yong Wu Li-Chen Zhao Zhan-Ying yang School of Physics Northwest UniversityXi'an 710127China Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi'an 710127China School of Public Management Northwest UniversityXi'an 710127China

Wave properties of solitons in a two-component Bose-Einstein condensate are investigated in *** demonstrate that dark solitons in one of components admit interference and tunneling behavior,in sharp contrast to the scalar dark solitons and vector dark *** analyses of interference properties show that spatial interference patterns are determined by the relative velocity of solitons,while temporal interference patterns depend on the velocities and widths of two solitons,differing from the interference properties of scalar bright ***,for an attractive interactions system,we show that interference effects between the two dark solitons can induce some short-time density humps(whose densities are higher than background density).Moreover,the maximum hump value is remarkably sensitive to the variation of the solitons'*** a repulsive interactions system,the temporal-spatial interference periods of dark-bright solitons have lower *** simulation results suggest that interference patterns for the dark-bright solitons are more robust against noises than bright-dark *** explicit interference properties can be used to measure the velocities and widths of *** is expected that these interference behaviors can be observed experimentally and can be used to design matter wave soliton interferometer in vector systems.

关键词： solitons interference behavior tunneling dynamics two-component Bose-Einstein condensates

Domain walls and their interactions in a two-component Bose–Einstein condensate

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第6期28卷 99-104页

作者： Ling-Zheng Meng yan-hong qin Li-Chen Zhao Zhan-Ying yang Shaanxi Key Laboratory for Theoretical Physics Frontiers School of PhysicsNorthwest UniversityXi’an 710069China

We investigate domain wall excitations in a two-component Bose–Einstein condensate with two-body interactions and pair-transition effects. It is shown that domain wall excitations can be described exactly by kink and anti-kink excitations in each component. The domain wall solutions are given analytically, which exist with different conditions compared with the domain wall reported before. Bubble-droplet structure can be also obtained from the fundamental domain wall, and their interactions are investigated analytically. Especially, domain wall interactions demonstrate some striking particle transition dynamics. These striking transition effects make the domain wall admit quite different collision behavior, in contrast to the collision between solitons or other nonlinear waves. The collisions between kinks induce some phase shift, which makes the domain wall change greatly. Their collisions can be elastic or inelastic with proper combination of fundamental domain walls. These characters can be used to manipulate one domain wall by interacting with other ones.

关键词： domain wall pair-transition multi-component Bose–Einstein condensate

Impact of psychological stress on irritable bowel syndrome

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第39期20卷 14126-14131页

作者： hong-yan qin Chung-Wah Cheng Xu-Dong Tang Zhao-Xiang Bian Department of Pharmacy First Hospital of Lanzhou University Lab of Brain and Gut Research School of Chinese Medicine Hong Kong Baptist University China Academy of Chinese Medical Sciences

Psychological stress is an important factor for the development of irritable bowel syndrome(IBS). More and more clinical and experimental evidence showed that IBS is a combination of irritable bowel and irritable brain. In the present review we discuss the potential role of psychological stress in the pathogenesis of IBS and provide comprehensive approaches in clinical treatment. Evidence from clinical and experimental studies showed that psychological stresses have marked impact on intestinal sensitivity, motility, secretion and permeability, and the underlying mechanism has a close correlation with mucosal immune activation, alterations in central nervous system, peripheral neurons and gastrointestinal microbiota. Stress-induced alterations in neuro-endocrine-immune pathways acts on the gut-brain axis and microbiota-gut-brain axis, and cause symptom flare-ups or exaggeration in IBS. IBS is a stresssensitive disorder, therefore, the treatment of IBS should focus on managing stress and stress-induced responses. Now, non-pharmacological approaches and pharmacological strategies that target on stress-related alterations, such as antidepressants, antipsychotics, miscellaneous agents, 5-HT synthesis inhibitors, selective 5-HT reuptake inhibitors, and specific 5-HT receptor antagonists or agonists have shown a critical role in IBS management. A integrative approach for IBS management is a necessary.

关键词： Psychological stress Irritable bowel syndrome Microbiota-gut-brain axis Immune activation

Highly sensitive fluorescence quantification of irinotecan in biological fluids with the aid of second-order advantage

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第12期21卷 1482-1486页

作者： Hai yan Fu Hai Long Wu Jin Fang Nie Yong Jie Yu hong yan Zou Ru qin Yu State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

A rapid,green and highly sensitive excitation-emission matrix（EEM） fluorescence method was proposed for analysis of irinotecan（CPT-11） in biological fluids including human plasma and urine samples of uncalibrated interferences with the aid of second-order *** to the serious spectral overlapping from biological matrices,the parallel factor analysis（PARAFAC） and the alternating normalization-weighted error（ANWE） have been recommended to perform directly calibration and overcome the problem which makes the traditional fluorospectrophotometer in *** results can be ***, performance of the proposed method was evaluated based on figures of merit and some statistical *** accuracy of both algorithms was validated by the elliptical joint confidence region（EJCR） *** precision and repeatability were also investigated by the relative standard deviations（RSDs） of intra-day and inter-day.

关键词： Irinotecan Biological fluids Excitation-emission matrix fluorescence PARAFAC ANWE

Inelastic Interaction of Double-Valley Dark Solitons for the Hirota Equation

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2021年第9期38卷 1-5页

作者： Xiao-Man Zhang yan-hong qin Li-Ming Ling Li-Chen Zhao School of Mathematics South China University of TechnologyGuangzhou 510640China School of Physics Northwest UniversityXi’an 710127China Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi’an 710127China Peng Huanwu Center for Fundamental Theory Xi’an 710127China

For a scalar integrable model,it is generally believed that the solitons interact with each other elastically,for instance,multi-bright solitons from the nonlinear Schrodinger equation and the Korteweg-de Vries equation,*** obtain double-valley dark solitons from the defocusing Hirota equation by the Darboux ***,we report a remarkable phenomenon for the inelastic interaction of the double-valley dark solitons,in contrast to the solitons interacting with each other elastically for a scalar integrable model in previous ***,we give the explicit conditions for the elastic collision based on the asymptotic analysis *** is shown that the double-valley dark solitons could also admit elastic interaction under the special parameters settings.

关键词： solitons integrable equation

A Direct Derivation of the Dark Soliton Excitation Energy

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2020年第5期37卷 25-27页

作者： Li-Chen Zhao yan-hong qin Wen-Long Wang Zhan-Ying yang School of Physics Northwest UniversityXi'an 710127 Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi'an 710127 College of Physics Sichuan UniversityChengdu 610065

Dark solitons are common topological excitations in a wide array of nonlinear *** dark soliton excitation energy is crucial for exploring dark soliton dynamics and is necessarily calculated in a renormalized form due to its existence on a finite *** its tremendous importance and success,the renormalized energy form was at first only suggested with no detailed derivation,and was then"derived"in the grand canonical *** revisit this fundamental problem and provide an alternative and intuitive derivation of the energy form from the fundamental Held energy by utilizing a limiting procedure that conserves number of *** derivation yields the same result,thus putting the dark soliton energy form on a solid basis.

关键词： soliton derivation excitation

Key factors in developing the trinitrobenzene sulfonic acid-induced post-inflammatory irritable bowel syndrome model in rats

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第20期18卷 2481-2492页

作者： hong-yan qin Hai-Tao Xiao Justin CY Wu Brian M Berman Joseph JY Sung Zhao-Xiang Bian School of Chinese Medicine Hong Kong Baptist University Hong Kong 999077 China Faculty of Medicine The Chinese University of Hong Kong.Hong Kong 999077 China Center for Integrative Medicine University of Maryland School of Medicine Baltimore MD 21201 United States

AIM:To investigate the key factors in developing the trinitrobenzene sulfonic acid(TNBS)-induced postinflammatory irritable bowel syndrome(PI-IBS)model in rats. METHODS:TNBS was administered to rats at the following conditions:(1)with different doses(20,10,5 mg/0.8 mL per rat);(2)with same dose in different concentrations(20 mg/rat,25,50 mg/mL);(3)in different ethanol percentage(25%,50%);and(4)at depth either 4 cm or 8 cm from *** 5 d and 4 wk after TNBS administration,inflammation severity and inflammation resolution were *** 4 and 8 wk after TNBS application,visceral hyperalgesia and enterochromaffin(EC)cell hyperplasia were assayed by abdominal withdrawal reflex test,silver staining and capillary electrophoresis. RESULTS:Our results showed that:(1)TNBS induced dose-dependent acute inflammation and inflammation *** 5 d post TNBS,the pathological score and myeloperoxidase(MPO)activity in all TNBS treated rats were significantly elevated compared to that of the control(9.48±1.86,8.18±0.67,5.78± 0.77 vs 0,and 3.55±1.11,1.80±0.82,0.97±0.08 unit/mg vs 0.14±0.01 unit/mg,P<0.05).At 4 wk post TNBS,the pathological score in high and median dose TNBS-treated rats were still significantly higher than that of the control(1.52±0.38 and 0.80±0.35 vs 0,P<0.05);(2)Intracolonic TNBS administration position affected the persistence of visceral *** 4 wk post TNBS,abdominal withdrawal reflex (AWR)threshold pressure in all TNBS-treated groups were decreased compared to that of the control(21.52 ±1.73 and 27.10±1.94 mmHg vs 34.44±1.89 mmHg,P<0.05).At 8 wk post TNBS,AWR threshold pressure in 8 cm administration group was still significantly decreased(23.33±1.33 mmHg vs 36.79±2.29 mmHg,P<0.05);(3)Ethanol percentage affected the TNBS-induced inflammation severity and visceral *** TNBS-25%ethanol-treated group,the pathological score and MPO activity were significantly lowered compared to that of the TNBS-50%ethanoltreated group,while AWR thres

关键词： Post-inflammatory Irritable bowel syndrome Rat model Trinitrobenzene sulfonic acid Key factors

Isolation and differentiation of embryonic stem cells from BALB/c mouse

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2006年第1期22卷 7-13页

作者： Wei GONG Zhuo-Jing LUO Hua HAN hong-yan qin You-Biao CHU Xue-Yu HU Li-Feng LAN Department of Orthopaedics XiJing Hospital the Fourth Military University Xi＇an 710032 China

Objective To invest the efficient method which can culture and induce embryonic stem cells to neuroeyte in vitro. Methods Isolate the blastula o f 3.5 d from BALB/c species mouse. Culture the cells from inner cell mass （inner cell mass, ICM） which were isolated by mechanical method on the mouse embryonic fibroblaste cell （MEF） feeder layer or 0.1% gelatin coated dishes. The stem ceils were identified by characterized morphology, alkaline phosphatase stain, differential potency in vivo and immunoehemistry stain. The isolated cells were differentiated by serial induction method that mimicking the intrinsic developmental process of the neural system. Results The isolated cells were positive for alkaline phosphatatse and SSEA-1 （ stage specific embryonic antigen 1 ）. Moreover they were identified pluripotent by differentiation in vivo. Therefore the isolated ceils presented the characters of ESCs. Then the isolated cells were able to differentiate into neuroeytes in vitro. Conclusion Mouse embryonic stem ceils isolation, culture and differentiation system has been established.

关键词： isolation and culture BALB/c mouse embryonic stem cells differentiation neurocyte

老年患者中心静脉导管感染的病原菌分布及耐药性分析

在线全文

学校读者我要写书评

暂无评论

中国卫生检验杂志 2014年第20期24卷 3013-3015页

作者：严红琴温州市中心医院检验科浙江温州325000

目的研究老年患者中心静脉导管引起感染的病原菌分布及其耐药性,为临床治疗提供依据。方法回顾性分析2011年7月-2013年7月老年患者中心静脉导管送检标本培养出的病原菌分布及耐药性。结果送检的230份样本中,中心静脉培养阳性76例,阳性率... 详细信息

目的研究老年患者中心静脉导管引起感染的病原菌分布及其耐药性,为临床治疗提供依据。方法回顾性分析2011年7月-2013年7月老年患者中心静脉导管送检标本培养出的病原菌分布及耐药性。结果送检的230份样本中,中心静脉培养阳性76例,阳性率为33.0%;检出菌株88株,其中革兰阳性球菌36株占40.9%,革兰阴性杆菌34株占38.6%,真菌18株20.5%;耐甲氧西林葡萄球菌(MRA)>70%,其中表皮葡萄球菌均为MRSE菌株;鲍氏不动杆菌均为泛耐药株。结论老年患者留置中心静脉导管易发生感染,葡萄球菌和鲍氏不动杆菌为常见致病菌且对多种抗菌药物耐药,应加强细菌检测,控制静脉导管感染。

关键词：老年患者中心静脉导管导管相关性感染病原菌耐药性