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Quantum Interference in Spontaneous Emission from a V-Type Three-Level Atom in a Two-Band Photonic Crystal

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Chinese Physics Letters 2000年第6期17卷 425-427页

作者： yang ya-ping Chen Hong ZHU Shi-yao Department of Physics Tongji UniversityShanghai 200092 Department of Physics Hong Kong Baptist UniversityHong Kong

The spontaneous emission from a V-type three-level atom embedded in a two-band photonic crystal is *** to the quantum interference between the two transitions and existence of two bands,the populations in the upper le... 详细信息

关键词： bands oscillation transitions

Sequence Analysis and Genotypes of Glutamate Rich Protein of Plasmodium falciparum Isolates from Different Malaria Endemic Areas in China

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Biomedical and Environmental Sciences 2002年第1期15卷 1-7页

作者： ZHU XIN-ping, ZHANG XIN-MEI, ZHOU LEI,yang ya-ping, AND GAO XINDepartment of Parasitology, Capital University of MedicalSciences, Beijing 100054, China Department of Parasitology Capital University of Medical Sciences Beijing 100054 China

Objective To sequence the gene encoding glutamate rich protein (GLURP) andidentify the genotypes of geographically different Plasmodium falciparum (P. f ) isolatesfrom China. Methods The gene of R2 repeat region of GLURP was amplified by nestedpolymerase chain reaction and cloned into T-vector. The nucleotide sequence of GLURPgene was determined by automatic sequencer (Dideoxy termination method) and analyzed byDNA Star software. Results At least 7 different GLURP genotypes ranging from 600 bpto 1 500 bp were found in Yunnan and Hainan provinces. R2 region of GLURP gene consistedof several repeat units. Each repeat unit was composed of 19-20 residues which were shownto be highly conserved. GLURP gene was also size polymorphic due to differences in thenumber of repeat units, whereas the repeat sequence was conserved. Sequence analysisshowed that DNA sequences and deduced amino acid sequences were highly homologousamong the geographically dispersed isolates or various isolates from the same geographicalregion. No obvious differences were found in the GLURP gene sequences amonggeographically different isolates. Conclusion GLURP gene is highly structure conservedand size polymorphic, and so is useful in searching for malaria vaccine candidate antigen anddeveloping a genotyping method for malaria research.

关键词： GLURP Plasmodium falciparum Malaria

Immunization of Male Mice with a New Recombinant GnRH Fusion Protein Reduces the Testicular Function

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Agricultural Sciences in China 2009年第3期8卷 380-385页

作者： FANG Fu-gui yang ya-ping LIU ya ZHANG Yun-hai TAO Yong WANG Suo-lu PU Yong ZHANG Xiao-rong Department of Animal Medicine College of Animal Science and Technology Anhui Agricultural University Hefei 230036 P.R.China Department of Animal Science College of Animal Science and Technology Anhui Agricultural University Hefei 230036 P.R.China

The objective of the present study was to evaluate the effect of an immunogenic maltose-binding protein-gonadotropin releasing hormone （GnRH-6-MBP） using genetic engineering. The synthetic mammalian tandem repeated GnRH hexamer gene was inserted into the expression plasmid pMAL-c2x. Recombinant GnRH-6-MBP protein was over- expressed in *** strain BL21. Amylose resin with affinity chromatograph was used to purify target protein. The reactiongenicity of fusion protein was identified by indirect enzyme linked immunosorbent assay （ELISA）, and the antigenicity and biological effects of GnRH-6-MBP were tested in mice. In the experiment, 20 male Kunming white mice of 20 d old were randomly divided into treatment and control group. Ten mice were immunized with 100 μg GnRH-6-MBP administered subcutaneously （s.c.） thrice at 2-week intervals with GnRH-6-MBP. Mice were sacrificed after 3 weeks following the booster injection, the testis was removed, weighed and measured, and the histological structure was observed. The reactiongenicity of fusion protein to GnRH antibody was much higher than the control. Active immunization against GnRH-6-MBP reduced remarkably （P 〈 0.01） the length and weight of the testis, and shortened the girth and width of the testis （P 〈 0.05）, and suppressed testicular spermatogenesis compared to the control mice. These results indicate that the recombinant GnRH-6-MBP acted as a strong immunogen and caused atrophy of the testis.

关键词： GnRH recombinant vaccine maltose-binding protein (MBP) immunocastration

Spontaneous Emission from a Driven Atom Embedded in a Photonic Crystal

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Chinese Physics Letters 2000年第1期17卷 25-27页

作者： XIE Shuang-Yuan yang ya-ping CHENG Hong ZHU Shi-yao WU Xiang Department of Physics Tongji UniversityShanghai 200092 Department of Physics Hongkong Baptist UniversityHong Kong

The properties of the spontaneous emission from a three-level atom with an external driving field in a photonic crystal are *** population in the two upper levels displays complete decay or oscillatory behavior,depending on the initial atomic state and the relative position of the two upper levels from the forbidden gap The intensity and the phase of the external field can also affect spontaneous emission from the atom.

关键词： decay oscillatory forbidden

Quantum Entropy Controlling in the Damping Jaynes-Cummings Model

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Chinese Physics Letters 2010年第1期27卷 163-166页

作者：贾飞谢双媛羊亚平 Department of Physics Tongji University Shanghai 200092

The quantum entropy of the damping Jaynes-Cummings model is investigated in different decay coefficients under detuning conditions. The results indicate that the larger the decay coefficient is, the more quickly the entropy decays. The detuning of the atom and field frequencies reduce the entanglement maximum in short time regions, but delays the damping process of the entanglement. The sine modulation enhances the entanglement in short time regions.

关键词： Damping off Timing Time Biodeterioration

负介电常数材料和负磁导率材料的双层结构中电磁波模式分析

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物理学报 2010年第4期59卷 2451-2456页

作者：张睿羊亚平同济大学物理系上海200092 上海市特殊人工微结构材料与技术重点实验室上海200092

研究了双层单负材料结构中电磁波的模式,主要分析了不同模式的产生条件,讨论了这些模式与材料参数之间的关系.当材料参数满足平均介电常数和磁导率为零时出现隧穿模式.当满足波导模产生条件时,波导模式的电磁波在材料两边的半无限真空... 详细信息

研究了双层单负材料结构中电磁波的模式,主要分析了不同模式的产生条件,讨论了这些模式与材料参数之间的关系.当材料参数满足平均介电常数和磁导率为零时出现隧穿模式.当满足波导模产生条件时,波导模式的电磁波在材料两边的半无限真空中以消逝波存在,在双层单负材料的界面处也可以出现较强的局域场.

关键词：单负材料传播模式隧穿模式波导模式

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各向异性光子晶体中Λ型原子动力学性质研究

物理学报 2005年第9期54卷 4129-4135页

作者：黄仙山羊亚平同济大学物理系上海200092

讨论了各向异性光子晶体中外驱动场作用下Λ型原子的动力学性质及辐射谱特性.通过理论分析和数值计算发现,原子上下能级的布居数将出现准周期性振荡的性质,其振荡的频率和振荡的幅度与上能级的耗散系数γ,驱动场的作用强度,驱动场和共... 详细信息

讨论了各向异性光子晶体中外驱动场作用下Λ型原子的动力学性质及辐射谱特性.通过理论分析和数值计算发现,原子上下能级的布居数将出现准周期性振荡的性质,其振荡的频率和振荡的幅度与上能级的耗散系数γ,驱动场的作用强度,驱动场和共振频率失谐度δ等相关;原子上能级与光子晶体带边的相对位置将直接影响到原子自发辐射的模式.此外,从辐射谱的角度分析光子晶体对原子周围辐射场的特性及其传输性质的影响.

关键词：光子晶体各向异性原子动力学布居数辐射谱

A anorectal fistula treatment with acellular extracellular matrix: A new technique

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World Journal of Gastroenterology 2008年第30期14卷 4791-4794页

作者： Wei-Liang Song Zhen-Jun Wang Yi Zheng Xin-Qing yang ya-ping Peng Department of General Surgery Chaoyang Hospital of Capital Medicine University Beijing 100020 China

AIM: To investigate a new technique of the anorectal fistula treatment with acellular extracellular matrix (AEM). METHODS: Thirty patients with anorectal fistula were treated with AEM. All fistula tracts and primary openings were identified using conventional fistula probe. All tracts were curetted with curet and irrigated with hydrogen peroxide and metronidazole. The AEM was pulled into the fistula tract from secondary to primary opening. The material was secured at the level of the primary opening. The excess AEM was trimmed at skin level at the secondary opening. RESULTS: All of the 30 patients had successful closure of their fistula after a 7-14 d follow-up. The healing rate of anal fistula in treatment group was 100%. The ache time, healing time and anal deformation of treatment group were obviously superior to traditional surgical methods. CONCLUSION: Using AEM anal fistula plug in treatment that causes the anorectal fistula is safe and successful in 100% of patients. It can reduce pain, shorten disease course and protect anal function.

关键词： Acellular extracellular matrix Anorectal fistula

利用含负折射率材料的光子晶体实现角度滤波器

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物理学报 2006年第6期55卷 2765-2770页

作者：许静平王立刚羊亚平同济大学物理系上海200092 浙江大学物理系光学研究所杭州310027

利用光子晶体的共振隧穿效应,并结合由负折射材料引起的零平均折射率带隙,设计出一种新型的角度滤波器,使得对于某一频率范围内的入射电磁波仅在特定入射角度的波能够全透,而其他角度的波不能透过.这将在微波器件乃至光学器件上有广泛应用.

关键词：光子晶体负折射率材料共振隧穿