检索结果-南通市图书馆

Exceptional points of any order in a single, lossy waveguide beam splitter by photon-numberresolved detection

Photonics Research 2019年第8期7卷 862-867页

作者： MARIO AQUIROZ-JUAREZ ARMANDO PEREZ-LEIJA KONRAD TSCHERNIG BLAS MRODRIGUEZ-LARA OMAR SMAGANA-LOAIZA KURT BUSCH YOGESH NJOGLEKAR ROBERTO DE JLEON-MONTIEL Instituto de Ciencias Nucleares Universidad Nacional Autonoma de MexicoApartado Postal70-54304510Cd.Mx.Mexico Max-Born-Institut Max-Born-StraBe2A12489BerlinGermany humboldt-universitat zu berlin Institut fur PhysikAG Theoretische Optik & PhotonikD-12489BerlinGermany Tecnologico de Monterrey Escuela de Ingenieria y CienciasAve.Eugenio Garza Sada250164849MonterreyN.L.Mexico Instituto Nacional de Astrofisica optica y ElectronicaCalle Luis Enrique Erro No.1Sta.Ma.TonantzintlaPue.CP72840Mexico Department of Physics and Astronomy Louisiana State UniversityBaton RougeLouisiana70803USA Department of Physics Indiana University Purdue University Indianapolis(IUPUI)IndianapolisIndiana46202USA

Exceptional points(EPs) are degeneracies of non-Hermitian operators where, in addition to the eigenvalues, the corresponding eigenmodes become degenerate. Classical and quantum photonic systems with EPs have attracted tremendous attention due to their unusual properties, topological features, and an enhanced sensitivity that depends on the order of the EP, i.e., the number of degenerate eigenmodes. Yet, experimentally engineering higher-order EPs in classical or quantum domains remain an open challenge due to the stringent symmetry constraints that are required for the coalescence of multiple eigenmodes. Here, we analytically show that the number-resolved dynamics of a single, lossy waveguide beam splitter, excited by N indistinguishable photons and post-selected to the N-photon subspace, will exhibit an EP of order N+1. By using the well-established mapping between a beam splitter Hamiltonian and the perfect state transfer model in the photon-number space,we analytically obtain the time evolution of a general N-photon state and numerically simulate the system’s evolution in the post-selected manifold. Our results pave the way toward realizing robust, arbitrary-order EPs on demand in a single device.

关键词： EP Exceptional points photon-numberresolved detection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ITPK1 is an InsP_(6)/ADP phosphotransferase that controls phosphate signaling in Arabidopsis.

引用

Molecular Plant 2021年第11期14卷 1864-1880页

作者： Esther Riemer Danye Qiu Debabrata Laha Robert K.Harmel Philipp Gaugler Verena Gaugler Michael Frei Mohammad-Reza Hajirezaei Nargis Parvin Laha Lukas Krusenbaum Robin Schneider Adolfo Saiardi Dorothea Fiedler Henning J.Jessen Gabriel Schaaf Ricardo F.H.Giehl Department of Plant Nutrition Institute of Crop Science and Resource ConservationRheinische Friedrich-Wilhelms-Universitat Bonn53115 BonnGermany Department of Chemistry and Pharmacy and CIBSS-Centre for Integrative Biological Signalling Studies Albert-Ludwigs University Freiburg79104 FreiburgGermany Medical Research Council Laboratory for Molecular Cell Biology(MRC-LMCB) University College LondonLondon WC1E 6BTUK Department of Biochemistry Indian Institute of ScienceBengaluruKarnataka 560012India Leibniz-Forschungsinstitut fur Molekulare Pharmakologie 13125 BerlinGermany Department of Chemistry Humboldt Universitat zu Berlin12489 BerlinGermany Institute of Agronomy and Crop Physiology Justus-Liebig University Giessen35392 GiessenGermany Department of Physiology&Cell Biology Leibniz-lnstitute of Plant Genetics and Crop Plant Research06466 GaterslebenGermany

In plants, phosphate (Pi) homeostasis is regulated by the interaction of PHR transcription factors with stand-alone SPX proteins, which act as sensors for inositol pyrophosphates. Here, we combined different methods to obtain a comprehensive picture of how inositol (pyro)phosphate metabolism is regulated by Pi and dependent on the inositol phosphate kinase ITPK1. We found that inositol pyrophosphates are more responsive to Pi than lower inositol phosphates, a response conserved across kingdoms. With CE-ESI-MS we could separate different InsP7 isomers in Arabidopsis and rice, and identify 4/6-InsP7 and a PP-InsP4 isomer hitherto not reported in plants. We found that the inositol pyrophosphates 1/3-InsP7, 5-InsP7 and InsP8 increase severalfold in shoots after Pi resupply and that tissue-specific accumulation of inositol pyrophosphates relies on ITPK1 activities and MRP5-dependent InsP6 compartmentalization. Notably, ITPK1 is critical for Pi-dependent 5-InsP7 and InsP8 synthesis in planta and its activity regulates Pi starvation responses in a PHR-dependent manner. Furthermore, we demonstrate that ITPK1-mediated conversion of InsP6 to 5-InsP7 requires high ATP concentrations and that Arabidopsis ITPK1 has an ADP phosphotransferase activity to dephosphorylate specifically 5-InsP7 under low ATP. Collectively, our study provides deeper insights into Pi-dependent changes in nutritional and energetic states with the synthesis of regulatory inositol pyrophosphates.

关键词： diphosphoinositol pentakisphosphate kinase inositol 1,3,4-trisphosphate 5/6-kinase 1 inositol phosphates inositol pyrophosphates phosphate homeostasis phosphate signaling

来源：

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

超声正弦时变弹性成像在肾小球肾炎早期诊断中的应用

引用

国际医学放射学杂志 2019年第6期 730-730页

作者： M.Grossmann H.Tzsch?tzsch S.T.Lang J.Guo A.Bruns M.Dürr 周茜阳 Charité–universit?tsmedizin berlin corporate member of Freie Universit?t Berlin Humboldt–Universit?t zu Berlin and Berlin Institute of Health Department of Radiology

摘要肾小球肾炎是一组以肾小球和肾小管间质纤维化为特征的一组肾脏疾病。多频率超声(US)正弦时变弹性成像可以无创地对组织弹性进行定量测量。目的评价US正弦时

关键词：肾小球肾炎弹性成像早期诊断

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nocturnal Dynamics of Sleep-Wake Transitions in Patients with Narcolepsy

Nocturnal Dynamics of Sleep-Wake Transitions in Patients wit...

引用

中国睡眠研究会第九届学术年会

作者： Xiaozhe Zhang Jan W.Kantelhardt Xiao Song Dong Dagmar Krefting Jing Li Han Yan Frank Pillmann Ingo Fietze Thomas Penzel Long Zhao Fang Han Department of Respiratory Medicine Peking University International Hospital Institute of Physics Martin-Luther-Universitt Halle-Wittenberg Institute of Physics Humboldt Universitt zu Berlin Department of Pulmonary Medicine Peking University People's Hospital International Clinical Research Center St.Anne's University Hospital Brno

Study Objectives:We investigate how characteristics of sleep-wake dynamics in humans are modified by narcolepsy,a clinical condition that is supposed to destabilize sleep-wake *** with and without cataplexy are considered *** in sleep scoring habits as a possible confounder have been ***:Four groups of subjects are considered:narcolepsy patients from China with（n=88） and without（n=15） cataplexy,healthy controls from China（n=110） and from Europe（n=187,two nights each）.After sleep stage scoring and calculation of sleep characteristic parameters,the distributions of wake-episode durations and sleep-episode durations are determined for each group and fitted by power-laws（exponent a） and by exponentials（decay time x）.Results:We find that wake duration distributions are consistent with power laws for healthy subjects（China:α=0.88,Europe:a=1.02）.Wake durations in all groups of narcolepsy patients,however,follow the exponential law（τ=6.2-8.1 min）.All sleep duration distributions are best fitted by exponentials on long time scales（τ=34-82 min）.Conclusions:We conclude that narcolepsy mainly alters the control of wake-episode durations but not sleepepisode durations,irrespective of *** sleep characteristic parameters as well as the observed distributions of shortest wake and sleep durations suggest that there are differences in scoring habits between Europe and China that,however,do not affect the main conclusion.

关键词： sleep-wake dynamics narcolepsy cataplexy sleep scoring wake-episode durations power-law distribution exponential distribution

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Identification of Early Nuclear Target Genes of Plastidial Redox Signals that Trigger the Long- Term Response of Arabidopsis to Light Quality Sh∽ts

引用

Molecular Plant 2015年第8期8卷 1237-1252页

作者： Lars Dietzel Christine Glaeer Monique Liebers Stefan Hiekel Florence Courtois Olaf Czarneckit Hagen Schlicke Yan zubo Thomas Borner Klaus Mayer Bernhard Grimm Thomas Pfannschmidt Department of Plant Physiology Institute of General Botany and Plant Physiology Friedrich-Schiller-University of Jena Domburger Strasse 159 07743 JenaGermany MIPS/IBI Helmholtz Zentrum MGnchen German Research Center for Environmental Health (GmbH) Ingolst~dter Landstrasse 1 85764 Neuherberg Germany Institute of Biology/Plant Physiology Humboldt-University Berlin Philippstrasse 13 Building 12 10115 Berlin Germany Institute of Biology Genetics Humboldt-University Berlin Chausseestrasse 117 10115 Berlin Germany present address: Institut fer Molekulare Biowissenschaften Pflanzliche Zellphysiologie Max-von-Laue-Strasse 9 Biozentrum Goethe-Universit~t Frankfurt 60438Frankfurt am Main Germany Present address: Zentrum fur Molekulare Biologie an der universitat zu Heidelberg (ZMBH) Im Neuenheimer Feld 282 69120 Heidelberg Germany present address: universite Grenoble-Alpes F-38000 Grenoble France Present address: CNRS UMR5168 F-38054 Grenoble France present address: CEA iRTSV Laboratoire de Physiologie Cellulaire & Vgetale F-38054 Grenoble France Present address: INRA USC1359 F-38054 Grenoble France Present address: Plant Reproductive Biology Group Department of Physiology and Ceil-Biology Leibniz Institute of Rant Genetics and Crop Plant Research (IPK)OT Gatersleben Corrensstrasse 3 D-06466 Stadt Seeland Germany present address: KWS Saat AG Grimsehlstrasse 31 37555 Einbeck Germany present address: Dartmouth College Department of Biological Sciences Ufe Sciences Center 78 College Street Hanover NH 03755 USA

Natural illumination conditions are highly variable and because of their sessile life style, plants are forced to acclimate to them at the cellular and molecular level. Changes in light intensity or quality induce changes in the reduction/oxidation （redox） state of the photosynthetic electron chain that acts as a trigger for compen- satory acclimation responses comprising functional and structural adjustments of photosynthesis and metabolism. Such responses include redox-controlled changes in plant gene expression in the nucleus and organelles. Here we describe a strategy for the identification of early redox-regulated genes （ERGs） in the nucleus of the model organism Arabidopsis thaliana that respond significantly 30 or 60 min after the generation of a reduction signal in the photosynthetic electron transport chain. By comparing the response of wild-type plants with that of the acclimation mutant stn7, we could specifically identify ERGs. The results reveal a significant impact of chloroplast redox signals on distinct nuclear gene groups including genes for the mitochondrial electron transport chain, tetrapyrrole biosynthesis, carbohydrate metabolism, and signaling lipid synthesis. These expression profiles are clearly different from those observed in response to the reduction of photosynthetic electron transport by high light treatments. Thus, the ERGs identified are unique to redox imbalances in photosynthetic electron transport and were then used for analyzing potential redox-responsive cis-elements, trans-factors, and chromosomal regulatory hot spots. The data identify a novel redox-responsive element and indicate extensive redox control at transcriptional and chromosomal levels that point to an unprecedented impact of redox signals on epigenetic processes.

关键词： plastidial redox signaling,early redox-regulated gene Arabidopsis thaliana Molecular Plant

来源：

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

支气管癌病人纵隔淋巴结增大——CT及组织学检查的回顾性评估

引用

放射学实践 1991年第3期6卷 115-118页

作者： G.Schmidt H.-G.Hieckel M.Schmidt 张本固 Institut fur Rontgendiagnostik des Bereichs Medizin (Charite) der humboldt-universitat zu berlin Forschungsinstitut fur Lungenkrankheiten und Tuberkulose 同济医科大学附属同济医院

纵隔淋巴结增大可能导致误诊。值得注意的是,支气管癌病人的非特异性反应可能误诊为转移性病灶。

关键词：支气管肿瘤纵隔淋巴结增大 CT

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Coherent interaction of atoms with a beam of light confined in a light cage

引用

Light(Science & Applications) 2021年第7期10卷 1247-1256页

作者： Flavie Davidson-Marquis Julian Gargiulo Esteban Gómez-López Bumjoon Jang Tim Kroh Chris Müller Mario Ziegler Stefan A.Maier Harald Kübler Markus A.Schmidt Oliver Benson Department of Physics and IRIS Adlershof Humboldt-Universität zu Berlin12489 BerlinGermany Chair in Hybrid Nanosystems Nanoinstitute MunichFaculty of PhysicsLudwig-Maximilians-Universität München80539 MunichGermany Department of Fiber Photonics Leibniz Institute of Photonic Technology07745 JenaGermany Competence Center for Micro-and Nanotechnologies Leibniz Institute of Photonic Technology Jena07745 JenaGermany Department of Physics Imperial College LondonLondon SW72AZUK Physikalisches Institut and Center for Integrated Quantum Science and Technology University of StuttgartPfaffenwaldring 5770569 StuttgartGermany Otto Schott Institute of Material Research 07743 JenaGermany

Controlling coherent interaction between optical fields and quantum systems in scalable,integrated platforms is essential for quantum ***,warm alkali-vapour cells integrated with on-chip photonic devices represent an attractive system,in particular for delay or storage of a single-photon quantum ***-core fibres or planar waveguides are widely used to confine light over long distances enhancing light-matter interaction in atomic-vapour ***,they suffer from inefficient filling times,enhanced dephasing for atoms near the surfaces,and limited light-matter *** report here on the observation of modified electromagnetically induced transparency for a non-diffractive beam of light in an on-chip,laterally-accessible hollow-core light *** layer deposition of an alumina nanofilm onto the light-cage structure was utilised to precisely tune the high-transmission spectral region of the light-cage mode to the operation wavelength of the atomic transition,while additionally protecting the polymer against the corrosive alkali *** experiments show strong,coherent light-matter coupling over lengths substantially exceeding the Rayleigh ***,the stable non-degrading performance and extreme versatility of the light cage provide an excellent basis for a manifold of quantum-storage and quantumnonlinear applications,highlighting it as a compelling candidate for all-on-chip,integrable,low-cost,vapour-based photon delay.

关键词： vapour interaction quantum

来源：

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

An Eight-year Epidemiologic Study of Head and Neck Tuberculosis in Texas,USA

An Eight-year Epidemiologic Study of Head and Neck Tuberculo...

引用

2018年浙江省检验医学学术年会

作者： XU QIAN Duc T.Nguyen Andreas E.Albers Yue Dong Jianxin Lyu Qing H.Meng Xiaohong Bi Edward A.Graviss Department of Laboratory Medicine Zhejiang Cancer Hospital Center for Precision Biomedicine Institute of Molecular MedicineMcGovern Medical Schoolthe University of Texas Health Science Center at Houston Key Laboratory of Laboratory Medicine Ministry of EducationZhejiang Provincial Key Laboratory of Medical GeneticsWenzhou Medical University Houston Methodist Research Institute Department of Otorhinolaryngology Head and Neck SurgeryBerlin Institute of HealthCharit éUniversit?tsmedizin Berlincorporate member of Freie Universit?t BerlinHumboldt-Universit?t zu BerlinCampus Benjamin Franklin People's Hospital of Hangzhou Medical College Department of Laboratory Medicine The University of Texas MD Anderson Cancer Center

Background:Head and neck tuberculosis (HNTB) especially cervical lymphadenopathy are the most common extrapulmonary indications of TB,but remain a diagnostic *** this study,we describe and analyze the epidemiologic ch...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

儿童恶性肿瘤冶疗的晚期副作用

引用

德国医学 1994年第4期11卷 239-240页

作者： G.Gaedicke 胡国清 universittsklinik und Poliklinik für Kinderheilkunde Abteilung Allgemeine Kinderheilkunde Medizinische Fakultt-Charité der Humboldt-Universitt zu BerlinSchumannstr.20/21D-10098 BerlinGermany 同济医科大学附属同济医院

在仅20年内儿童恶性肿瘤的治愈率有了显著提高。以往70的病人在程度不同的较长时间缓解后死亡,现今约70%的儿童肿瘤有望治愈。在联邦德国,每年约有2000多儿童患白血病和其它恶性肿瘤。过去20年取得的进展不但使儿童疾病死亡率明显降低,... 详细信息

在仅20年内儿童恶性肿瘤的治愈率有了显著提高。以往70的病人在程度不同的较长时间缓解后死亡,现今约70%的儿童肿瘤有望治愈。在联邦德国,每年约有2000多儿童患白血病和其它恶性肿瘤。过去20年取得的进展不但使儿童疾病死亡率明显降低,而且也深入研究了治疗导致的医学和社会心理学后果。由于细胞抑制剂和放疗的作用。

关键词：肿瘤癌生长障碍后遗症儿童

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

克隆氏病与溃疡性结肠炎——免疫发病学新知

引用

德国医学 1999年第2期16卷 108-110页

作者： S.Schreiber E.F.Stange 武忠弼 universittsklinikum Charite der humboldt-universitat zu berlin Ⅳ.Medizinische KlinikSchumannstr.20/21D-10117 BerlinGermany 同济医科大学

克隆氏病与溃疡性结肠炎为病因不明的慢性肠道疾病。近年来,肠道炎性反应的主要发病机制已被阐明。由单核细胞和巨噬细胞产生的前炎性细胞因子白介素1(IL-1)、白介素6(IL-6)和肿瘤坏死因子α(TNF-α)在肠道炎症的调控中具有重要意义。... 详细信息

克隆氏病与溃疡性结肠炎为病因不明的慢性肠道疾病。近年来,肠道炎性反应的主要发病机制已被阐明。由单核细胞和巨噬细胞产生的前炎性细胞因子白介素1(IL-1)、白介素6(IL-6)和肿瘤坏死因子α(TNF-α)在肠道炎症的调控中具有重要意义。炎症抑制介质如白介素1受体站抗物(IL-1ra)、白介素10(IL-10)和白介素4(IL-4),则与前炎性细胞因子的作用相抗衡。

关键词：克隆病溃疡性结肠炎免疫病理生理

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：