期刊文献+
共找到14篇文章
< 1 >
每页显示 20 50 100
5-羟色胺转运体基因异体表达模型的建立 被引量:3
1
作者 王艺颖 金珠 +1 位作者 李慈珍 刘远谋 《中国应用生理学杂志》 CAS CSCD 北大核心 2005年第4期444-448,共5页
目的:探讨建立5-羟色胺转运体(5-HTT)基因异体表达模型的可行性,且为进一步探讨5-羟色胺重摄取的动力过程和条件以及其功能的调控机制奠定基础。方法:利用体外转录cRNA技术将克隆至pOTV中的5-HTT的cDNA转录、合成5HTT的cRNA,通过显微注... 目的:探讨建立5-羟色胺转运体(5-HTT)基因异体表达模型的可行性,且为进一步探讨5-羟色胺重摄取的动力过程和条件以及其功能的调控机制奠定基础。方法:利用体外转录cRNA技术将克隆至pOTV中的5-HTT的cDNA转录、合成5HTT的cRNA,通过显微注射技术将该cRNA注入成熟雌性非洲爪蟾卵母细胞的胞质中,使其表达以建立5-羟色胺转运体(SERT)的异体表达模型,并用电压钳技术检测其转运功能。结果:爪蟾卵母细胞可被用做5-HTT的异体表达模型,其转运功能呈浓度依赖性并具饱和现象,转运过程可被特异阻断剂De-sipramine阻断。结论:非洲爪蟾卵母细胞可作为5-羟色胺等单胺类神经递质转运体的异体表达系统,为进一步研究转运体蛋白的功能和调控提供了有效工具。 展开更多
关键词 5-HT转运体(SERT) 卵母细胞 异体表达 电压钳
下载PDF
不同方法筛查RhD弱表达变异体
2
作者 宋任浩 魏世锦 +1 位作者 李荣秀 张香改 《中国实验诊断学》 北大核心 2011年第9期1513-1515,共3页
目的研究不同检验方法在RhD弱表达变异体中的应用范围及相互之间的关系。方法应用酶介质法和间接抗球蛋白试验(indirect antiglobulin test,IAT)在盐水凝集法初筛出的RhD阴性个体中进一步筛查弱D/部分D,然后在IAT确认的RhD阴性个体中采... 目的研究不同检验方法在RhD弱表达变异体中的应用范围及相互之间的关系。方法应用酶介质法和间接抗球蛋白试验(indirect antiglobulin test,IAT)在盐水凝集法初筛出的RhD阴性个体中进一步筛查弱D/部分D,然后在IAT确认的RhD阴性个体中采用吸收放散试验筛查DEL型。结果 278例RhD阴性个体酶介质法和IAT分别筛查出13和15例弱D/部分D,吸收放散试验筛查出64例DEL型。结论在这几种RhD弱表达变异体筛查方法中,盐水凝集法不能筛查RhD弱表达变异体,只能筛查正常表达的RhD抗原;酶介质法和IAT可以筛查弱D/部分D,酶介质法比IAT少检出两例(P>0.05),但得出酶介质法不如IAT敏感的结论尚早,有待于大样本的进一步研究;在IAT确认的RhD阴性个体中,若采用更为敏感的吸收放散试验,仍有部分个体RhD抗原检测为阳性。 展开更多
关键词 方法 筛查 RhD弱表达异体
下载PDF
5-羟色胺重摄取过程的机制 被引量:3
3
作者 李慈珍 杨智昉 +4 位作者 王艺颖 张野 郑燕倩 刘远谋 王红卫 《细胞生物学杂志》 CSCD 2006年第6期917-922,共6页
将重组质粒pOTV-hSERT(oocytetranscriptionvector)中的人5-羟色胺转运体(hSERT)cDNA转录合成cRNA,通过显微注射技术注入爪蟾卵母细胞,建立hSERT异体表达模型,用电压钳技术测定其转运功能,研究hSERT重摄取的调控因素。胞外5-羟色胺(5-HT... 将重组质粒pOTV-hSERT(oocytetranscriptionvector)中的人5-羟色胺转运体(hSERT)cDNA转录合成cRNA,通过显微注射技术注入爪蟾卵母细胞,建立hSERT异体表达模型,用电压钳技术测定其转运功能,研究hSERT重摄取的调控因素。胞外5-羟色胺(5-HT)灌流液引起内向转运电流,可被hSERT特异阻断剂去甲丙米嗪(desipramine)所阻断。该电流大小随测试电位的变化而改变,膜电位愈负,转运电流愈大。灌流液无钠或无氯时,转运电流分别减小(89.6±1.4)%和(51.7±1.5)%,表明胞外钠、氯离子为转运过程的必需条件。胞外5-HT浓度变化时,转运电流呈剂量依赖性,并有饱和现象。提高胞内5-HT浓度至胞外的20或40倍时,并不影响转运过程。因此,5-HT的重摄取与胞外Na+、Cl-离子联合转运有关,胞内5-HT浓度并不影响转运电流的大小,细胞膜电位的变化对转运过程有快速调控作用。 展开更多
关键词 5羟色胺转运体 卵母细胞 异体表达 电压钳
下载PDF
Expression and Phylogenetic Analysis of Pea Actin Isoforms 被引量:5
4
作者 江元清 赵武玲 《Acta Botanica Sinica》 CSCD 2002年第12期1456-1461,共6页
Pea ( Pisum sativum Linn.) actin gene family contains at least three isoforms (PEAcⅠ, PEAcⅡand PEAcⅢ), and the DNA sequence of these isoforms show high similarity in the coding regions and significant divergence... Pea ( Pisum sativum Linn.) actin gene family contains at least three isoforms (PEAcⅠ, PEAcⅡand PEAcⅢ), and the DNA sequence of these isoforms show high similarity in the coding regions and significant divergence in the untranslated regions. RT_PCR and Southern blotting using 3′_untranslated region (3′_UTR) as specific probe revealed that pea isoactin genes were expressed in roots, stems, leaves, tendrils, pollen and juvenile siliques, but displayed different patterns of transcript accumulation. Two_fold serial dilution electrophoresis showed PEAcⅠ mRNA preferentially accumulated in rapidly developing tissues: it peaked in seven days' stem; remained at a rather high level in leaves within a month but decreased significantly later; varied a little in tendrils and reached a median and a very low level respectively in juvenile siliques and in pollen. PEAcⅡ displayed somewhat similar expression pattern to PEAcⅠ. The observed differences in sequences and transcript accumulation patterns suggest that the individual pea actin genes may differ in their transcriptional regulation and cellular function. Phylogenetic tree of actins showed that pea actin isoforms are as diverged from each other as they are from other plant actins, and pea actins might have originated from a common ancestor before the divergence of the dicot and monocot plants. 展开更多
关键词 ACTIN 3′_untranslated region (3′_UTR) differential expression molecular evolution pea ( Pisum sativum )
下载PDF
Establishment of the Agrobacterium-mediated Genetic Transformation System of Ginkgo biloba and the Construction of the Expression Vector of Gb-DXR
5
作者 冯国庆 杨颖舫 +4 位作者 李郑娜 成瑜 杨春贤 陈敏 廖志华 《Agricultural Science & Technology》 CAS 2010年第3期28-32,114,共6页
[Objective] The research aimed to provide reference for increasing the genetic transformation efficiency of Ginkgo biloba mediated by Agrobacterium.[Method] Taking the mature embryos of Ginkgo biloba seeds as explants... [Objective] The research aimed to provide reference for increasing the genetic transformation efficiency of Ginkgo biloba mediated by Agrobacterium.[Method] Taking the mature embryos of Ginkgo biloba seeds as explants,after 48 hours' pre-cultivation on MS medium in the absence of phytohormone,GUS gene was transmitted into embryos of Ginkgo biloba mediated by three kinds of Agrobacterium.Transient expression of GUS gene activity was observed through histochemical staining,and the influencing factors of the expression of GUS gene were analyzed.And the expression vector of 1-deoxy-D-xylulose-5-phosphate reductoisomerase in the biosynthesis approach of biobalide precursor of Ginkgo biloba was constructed.[Result] A more suitable genetic transformation scheme was obtained as follows:taking embryos of Ginkgo biloba as explants,using EHA105 Agrobacterium with pCAMBIA1304+ for infection,co-culture for 3 days and GUS staining.The results showed that transient expression rate of GUS after transformation was higher.[Conclusion] The research provide a more effective method for further study on the transgene of Ginkgo biloba. 展开更多
关键词 Embryos of Ginkgo biloba AGROBACTERIUM-MEDIATED Genetic transformation GUS gene 1-deoxy-D-xylulose-5-phosphate reductoisomerase Expression vector
下载PDF
DNA end binding activity and Ku70/80 heterodimer expression in human colorectal tumor 被引量:4
6
作者 Paola Mazzarelli Paola Parrella +13 位作者 Davide Seripa Emanuela Signori Giuseppe Perrone Carla Rabitti Domenico Borzomati Armando Gabbrielli Maria Giovanna Matera Carolina Gravina Marco Caricato Maria Luana Poeta Monica Rinaldi Sergio Valeri Roberto Coppola Vito Michele Fazio 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第42期6694-6700,共7页
AIM: TO determine the DNA binding activity and protein levels of the Ku70/80 heterodimer, the functional mediator of the NHEJ activity, in human colorectal carcinogenesis. METHODS: The Ku70/80 DNA-binding activity w... AIM: TO determine the DNA binding activity and protein levels of the Ku70/80 heterodimer, the functional mediator of the NHEJ activity, in human colorectal carcinogenesis. METHODS: The Ku70/80 DNA-binding activity was determined by electrophoretic mobility shift assays in 20 colon adenoma and 15 colorectal cancer samples as well as matched normal colonic tissues. Nuclear and cytoplasmic protein expression was determined by immunohistochemistry and Western blot analysis. RESULTS: A statistical found in both adenomas y significant difference was and carcinomas as compared to matched normal colonic mucosa (P〈0.00). However, changes in binding activity were not homogenous with approximately 50% of the tumors showing a clear increase in the binding activity, 30% displaying a modest increase and 15% showing a decrease of the activity.Tumors, with increased DNA-binding activity, also showed a statistically significant increase in Ku70 and Ku86 nuclear expression, as determined by Western blot and immunohistochemical analyses (P〈0.001). Cytoplasmic protein expression was found in pathological samples, but not in normal tissues either from tumor patients or from healthy subjects. CONCLUSION: Overall, our DNA-binding activity and protein level are consistent with a substantial activation of the NHEJ pathway in colorectal tumors. Since the NHEJ is an error prone mechanism, its abnormal activation can result in chromosomal instability and ultimately lead to tumorigenesis. 展开更多
关键词 Colorectal cancer Colon adenoma DNA-dependent protein kinase KuT0/80 heterodimer Mismatch repair Non-homologous end joining Doublestrand break repair Chromosomal instability
下载PDF
NANOPARTICLE AS A NEW GENE TRANSFERRING VECTOR IN SPECIFIC EXPRESSION GENE 被引量:1
7
作者 管珩 李拥军 +7 位作者 郑曰宏 刘昌伟 杨菁 宋存先 王彭延 赵三妹 王宗立 佘铭鹏 《Chinese Medical Sciences Journal》 CAS CSCD 2002年第4期220-224,共5页
Objective. To evaluate the possibility and efficiency of nanoparticle as a new vector in specific gene transference.Methods. Nanoparticle-DNA complex was prepared with Poly- dl-lactic-co-glycolic acid (PLGA) bearing a... Objective. To evaluate the possibility and efficiency of nanoparticle as a new vector in specific gene transference.Methods. Nanoparticle-DNA complex was prepared with Poly- dl-lactic-co-glycolic acid (PLGA) bearing anti-sense monocyte chemotactic protein-1 (A-MCP-l), a specific expression gene, and the package efficiency, release progress in vitro, and the size of the complex were determined. The possibility of the new vector was evaluated with genomic DNA PCR by transferring gene into cultured smooth muscle cells (SMC), cationic lipids as a control. For study in vivo, jugular vein-to-artery bypass grafting procedures were performed on 20 New Zealand white rabbits, of which 6 grafts were transferred with nanoparticle-A-MCP-1 (200 μg), 6 with A - MCP-1 (200 μ g) by cationic liposome, 4 with LNCX plasmid, and 4 as control. Fourteen days after the grafts were harvested, the expression of A-MCP-l and its effect on MCP-1 in vein grafts were detected by dot blot, and the morphologic evaluation of grafts was performed.Results. The package efficiency of the nanoparticle-DNA complex was 0. 9% , release progress in vitro lasted 2 weeks, and the size ranged from 150 to 300nm. SMC genomic DNA PCR showed that A-MCP-l gene could be successfully transfected into cells by nanoparticle. The study in vivo indicated that A-MCP-l mRNA was expressed in both local gene delivery groups, nanoparticle and liposome, meanwhile, MCP-1 expression in vein grafts was significantly inhibited and neointimal hyperplasia was notably reduced.Conclusion. Nanoparticle can act as a vector to transfect specific gene. 展开更多
关键词 gene therapy NANOPARTICLE monocyte chemotactic protein-1
下载PDF
4型登革病毒NS2A蛋白通过UXT-V1逃避宿主免疫的机制研究
8
作者 鞠鹏飞 王政坤 张建立 《国际检验医学杂志》 CAS 2020年第8期952-955,共4页
目的探讨4型登革病毒NS2A蛋白通过泛转录表达因子剪接变异体1(UXT-V1)逃避宿主免疫的机制。方法在HEK-293T细胞中,4型登革病毒感染后过表达NS2A蛋白,通过实时荧光定量PCR(qPCR)检测干扰素-β(IFN-β)、白细胞介素-8(IL-8)、干扰素诱导蛋... 目的探讨4型登革病毒NS2A蛋白通过泛转录表达因子剪接变异体1(UXT-V1)逃避宿主免疫的机制。方法在HEK-293T细胞中,4型登革病毒感染后过表达NS2A蛋白,通过实时荧光定量PCR(qPCR)检测干扰素-β(IFN-β)、白细胞介素-8(IL-8)、干扰素诱导蛋白54(ISG54)的表达量;通过荧光素酶报告实验检测NS2A蛋白对IFN-β与核因子κB(NF-κB)通路的影响;通过免疫共沉淀检测NS2A蛋白与UXT-V1的相互作用;通过核蛋白抽取检测IRF3和p65的核定位。结果4型登革病毒NS2A蛋白与宿主UXT-V1存在相互作用。此外,4型登革病毒NS2A蛋白抑制宿主IFN-β、IL-8和ISG54的mRNA水平,阻断IRF3和p65的核转移,抑制宿主IFN-β与NF-κB通路。结论4型登革病毒NS2A蛋白通过与UXT-V1的相关作用阻断宿主固有免疫关键因子IRF3和p65的核定位,抑制宿主IFN-β与NF-κB通路,最终到达其免疫逃避的目的。 展开更多
关键词 4型登革病毒 NS2A蛋白 泛转录表达因子剪接变异体1 免疫
下载PDF
Aberrant Expression of Notch1 in Cervical Cancer
9
作者 Li Sun Qimin Zhan +2 位作者 Wenhua Zhang Yongmei Song Tong Tong 《Chinese Journal of Clinical Oncology》 CSCD 2007年第1期38-41,共4页
OBJECTIVE To investigate the putative role of the Notch1 receptor in cervical cancer carcinogenesis and progression. METHODS The expression of the Notch1 protein was analyzed by a Western-blotting approach in 40 cervi... OBJECTIVE To investigate the putative role of the Notch1 receptor in cervical cancer carcinogenesis and progression. METHODS The expression of the Notch1 protein was analyzed by a Western-blotting approach in 40 cervical cancer and 30 normal cervical tissues. Some tissues were examined using RT-PCR to determine mRNA levels. Celluar localization of the Notch1 protein in the paraffin-embedded cervical tissues was also analyzed by immunohistochemistry. RESULTS The Notch1 protein was detected in all 30 normal cervical tissues. In contrast, only 6 samples of 40 cervical cancer tissues showed Notch1 expression. The level of the Notch1 protein expression was significantly lower in cervical cancer tissues than that in normal tissue samples. In agreement with these observations, levels of Notch1 mRNA were found to be substantially down-regulated in cervical cancer tissues. In the immunohistochemistry staining assay, the Notch1 protein was shown to localize predominantly in the cytoplasm and nucleoli of the normal cervical squamous epithelium of the cervix, but no staining was observed in the cervical cancer cells. Notch1 expression was observed to correlate with the clinical disease stage, but there were no correlations with age, tumor size, grade or lymph node metastasis (P〉0.05). The levels of Notch1 protein expression were significantly higher in early stages (Ⅰ-Ⅱa, 66.7%) compared to those in the advanced stages (Ⅱb~Ⅳ,12.6%)(P=0.001). CONCLUSION Notch1 may play a role as a tumor suppressor in cervical tumorigenesis. Determination of Notch1 expression may be helpful for preoperative diagnosis and accuracy of staging. But its clinical use for cervical cancer requires further investigation. 展开更多
关键词 cervical cancer tumour suppressor Notch1.
下载PDF
Gene-Ontology Analysis on the Differentially Expressed Genes in Maize (Zea mays L.) Ear Rot 被引量:2
10
作者 Guang-Sheng Yuan Jian Gao Zhi-Ming Zhang Juan Du Gui-Qing Mu Guang-Tang Pan 《Journal of Life Sciences》 2013年第3期219-226,共8页
To better know FM (Fusarium moniliforme) induced genes in maize ear rot, GO (gene ontology) method was performed to analyze detail physiological functions in the defensive response after pathogen infection. This g... To better know FM (Fusarium moniliforme) induced genes in maize ear rot, GO (gene ontology) method was performed to analyze detail physiological functions in the defensive response after pathogen infection. This gene annotation system was widely used to investigate large numbers of genes involving in real active role or regulator in cell response. First of all, differentially expressed genes were isolated by using genechip platform at 96 h post-inoculation with FM in maize inbred Bt-1. In total, 482 differentially expressed unique genes were screened out in inbred Bt-1 when compared to mock-inoculated bract tissues. Then, each gene was annotated to define functional class by GO method. Finally, these large FM-responsive genes with significant differentially change were sorted into cellular component, molecular function and biological process with complicated network by molecular annotation system. The demonstrated information in the GO analysis could provide another view for understanding the molecular mechanism and indicate a deeply complicated network with gene function underlying disease development in the host tissue. The findings in this study provide important bases to probe the molecular processes, the alteration of metabolism and the immune mechanism upon the FM infection in maize. 展开更多
关键词 Ear rot GENECHIP Fusarium moniliforme gene ontology Zea mays.
下载PDF
Differential expression of autocrine motility factor receptor (AMFR) mRNA in normal and cancer cells detected by in situ hybridization
11
作者 HUANGBAIQU AVRAHAMRAZ 《Cell Research》 SCIE CAS CSCD 1995年第2期221-234,共14页
The receptor for autocrine motility factor (AMFR) is known to be involved in the process of AMF-mediated cell migration and metastasis. This paper describes the procedures of non-radioactive in situ hybridization (ISH... The receptor for autocrine motility factor (AMFR) is known to be involved in the process of AMF-mediated cell migration and metastasis. This paper describes the procedures of non-radioactive in situ hybridization (ISH) detection of AMFR mRNA in both paraffin-embedded surgical sections and cultured cells using either biotinylated oligonucleotide probes or digoxigenin-labeled RNA probes. The results showed that the AMFR mRNA was expressed at an enhanced level in hyperplaJstic and malignant tissues of breast and prostate cancer patient surgical specimens, indicating that the elevated AMFR expression was associated with the tissue malignancy Moreover, AMFR mRNA was detected in both normal and earcinoma cells when cultured at a subconfluent density. However, AMFR expression was inhibited in confluent normal (3T3-A31 murine fibroblast and FHs738BL human bladder) cells while it continued to express in carcinoma (J82 human bladder)and metastatic (3T3-M murine fibroblast) cells irrespective of cell density This suggested a cell-cell contact downregulation of AMFR mRNA expression in normal but not in cancer cells. The ISH data obtained in this study are closely consistent with the AMFR protein expression pattern previously reported, implying that the differential expression of AMFR gene may be regulated and controlled at the transcriptional level. 展开更多
关键词 Autocrine motility factor receptor (AMFR) non-radioactive in situ hybridization biotinylated probe digoxigenin-labeled RNA probe
下载PDF
In vivo gene expression profiling of the entomopathogenic fungus Beauveria bassiana elucidates its infection stratagems in Anopheles mosquito 被引量:5
12
作者 Yiling Lai Huan Chen +3 位作者 Ge Wei Guandong Wang Fang Li Sibao Wang 《Science China(Life Sciences)》 SCIE CAS CSCD 2017年第8期839-851,共13页
The use of entomopathogenic fungi to control mosquitoes is a promising tool for reducing vector-borne disease transmission. To better understand infection stratagems of insect pathogenic fungi, we analyzed the global ... The use of entomopathogenic fungi to control mosquitoes is a promising tool for reducing vector-borne disease transmission. To better understand infection stratagems of insect pathogenic fungi, we analyzed the global gene expression profiling of Beauveria bassiana at 36, 60, 84 and 108 h after topical infection of Anopheles stephensi adult mosquitoes using RNA sequencing (RNA-Seq). A total of 5,354 differentially expressed genes (DEGs) are identified over the course of fungal infection. When the fungus grows on the mosquito cuticle, up-regulated DEGs include adhesion-related genes involved in cuticle attachment, Pthl l-like GPCRs hypothesized to be involved in host recognition, and extracellular enzymes involved in the degradation and penetration of the mosquito cuticle. Once in the mosquito hemocoel, the fungus evades mosquito immune system probably through up-regulating expression of 13-1,3-glucan degrading enzymes and chitin synthesis enzymes for remodeling of cell walls. Moreover, six previous unknown SSCP (small secreted cysteine-rich proteins) are significantly up-regulated, which may serve as "effectors" to suppress host defense responses. B. bassiana also induces large amounts of antioxidant genes to mitigate host-generated exogenous oxidative stress. At late stage of infection, B. bassiana activates a broad spectrum of genes including nutrient degrading enzymes, some transporters and metabolism pathway components, to exploit mosquito tissues and hemolymph as a nutrient source for hyphal growth. These findings establish an important framework of knowledge for further comprehensive elucidation of fungal pathogenesis and molecular mechanism of Beauveria-mosquito interactions. 展开更多
关键词 insect fungal pathogen fungus-insect interaction fungal pathogenesis RNA-SEQ vector control
原文传递
Localization and characterization of the hypothetical protein CT440 in Chlamydia trachomatis-infected cells 被引量:5
13
作者 LI ZhongYu HUANG QiuLin +4 位作者 SU ShengMei ZHOU Zhou CHEN ChaoQun ZHONG GuangMing WU YiMou 《Science China(Life Sciences)》 SCIE CAS 2011年第11期1048-1054,共7页
The inclusion membrane proteins play potentially important roles in chlamydial biology and pathogenesis.Here we localized and characterized the hypothetical protein CT440 in Chlamydia trachomatis-infected cells.The op... The inclusion membrane proteins play potentially important roles in chlamydial biology and pathogenesis.Here we localized and characterized the hypothetical protein CT440 in Chlamydia trachomatis-infected cells.The open reading frame(ORF) encoding the CT440 protein from the C.trachomatis serovar D genome was cloned into the prokaryotic expression vector pGEX-6p and expressed as a glutathione-S-transferase(GST) fusion protein in E.coli XL1-Blue.The CT440 fusion protein was used to immunize mice to raise antigen-specific antibody.After verification by Western blot and immunofluorescence assay(IFA),the specific antibody was used to localize the endogenous CT440 protein and to detect its expression pattern in Chlamydia-infected cells.Cytosolic expression of CT440 in HeLa cells was also carried out to evaluate the effect of the CT440 protein on the subsequent chlamydial infection.The results showed that the hypothetical protein CT440 was localized in the C.trachomatis inclusion membrane,and was detectable 12 h after chlamydial infection.Expression of CT440 in the cytoplasm did not inhibit the subsequent chlamydial infection.In summary,we have identified a new inclusion membrane protein that may be an important candidate for understanding C.trachomatis pathogenesis. 展开更多
关键词 Chlamydia trachomatis CT440 inclusion membrane protein
原文传递
Anisotropic Intervalley Plasmon Excitations in Graphene
14
作者 陈健 许怀哲 《Communications in Theoretical Physics》 SCIE CAS CSCD 2015年第4期520-524,共5页
We investigate theoretically the intervalley plasmon excitations(IPEs) in graphene monolayer within the random-phase approximation. We derive an analytical expression of the real part of the dielectric function. We fi... We investigate theoretically the intervalley plasmon excitations(IPEs) in graphene monolayer within the random-phase approximation. We derive an analytical expression of the real part of the dielectric function. We find a lowenergy plasmon mode with a linear anisotropic dispersion which depends on the Fermi energy and the dielectric constant of substrate. The IPEs show strongly anisotropic behavior, which becomes significant around the zigzag crystallographic direction. More interestingly, the group velocity of IPE varies from negative to positive, and vanishes at special energy. 展开更多
关键词 PLASMON intervalley ANISOTROPY GRAPHENE
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部