检索结果-南通市图书馆

light-induced frequency shifts for the lowest vibrational levels of ultracold Cs2 in the molecular pure long-range 0^-g state

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2020年第2期15卷 57-62页

作者： Ji-Zhou Wu Yu-Qing Li Wen-Liang Liu Jie Ma Lian-Tuan Xiao Suo-Tang Jia State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China College of Physics and Electronic Engineering Shanxi UniversityTaiyuan 030006China

The light-induced frequency shift(LIFS)of ultracold molecular ro-vibrational levels originates from the strong coupling of the atomic-scattering state and the bound-molecular *** this paper,we present our experimental determination of the LIFSs of the lowest vibrational levels(v=0,1)in the purely long-range 0^-g state of ultracold cesium molecules.A high-resolution double photoassociation spectroscopy is developed,which serves as frequency ruler to measure the frequency shifts of the lowest molecular levels for *** experimental results are qualitatively consistent with the theoretical expectations.

关键词： light-induced frequency shift ultracold molecule double photoassociation spectroscopy long-range state

Visible-light-induced,autopromoted nickel-catalyzed threecomponent arylsulfonation of 1,3-enynes and mechanistic insights

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

Science China Chemistry 2022年第4期65卷 753-761页

作者： Duo-Duo Hu Qian Gao Jing-Cheng Dai Ru Cui Yuan-Bo Li Yuan-Ming Li Xiao-Guo Zhou Kang-Jie Bian Bing-Bing Wu Kai-Fan Zhang Xi-Sheng Wang Yan Li Hefei National Laboratory for Physical Sciences at the Microscale Department of ChemistryCenter for Excellence in Molecular Synthesis of CASUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China

A light-induced,nickel-catalyzed three-component arylsulfonation of 1,3-enynes in the absence of photocatalyst is *** methodology exhibited mild conditions,broad scope and high efficiency,and its synthetic utility has been demonstrated by a concise total synthesis of sulfone-containing drug *** mechanistic studies indicated that this light induced nickel catalysis is autopromoted by in situ produced allene,which plays a key role as co-ligand in the photoactive excited state Ni(Ⅰ)species for the LMCT *** detailed elucidation of this light-induced nickel catalytic cycle may shed some lights on the exploitation of new catalytic activity and establishment of novel methods.

关键词： light-induced autopromoted ligand to metal charge transfer nickel allene

Spontaneous and light-induced photon emission from intact brains of chick embryos

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 1997年第1期40卷 43-51页

作者：张锦珠于文斗孙彤 Institute of Biophysics Chinese Academy of Sciences Beijing 100101 .China International Institute of Biophysics Kaiserslautem 67661 Germany

Photon emission (PE) and light-induced photon emission(LPE) of intact brains isolated from chick embryos have been measured by using the single photon counting device. Experimental results showed that the intensi-ty level of photon emission was detected to be higher from intact brain than from the medium in which the brain was immerged during measuring, and the emission intensity was related to the developmental stages, the healthy situation of the measured embryos, and the freshness of isolated brains as well. After white light illumination, a short-life de-layed emission from intact brains was observed, and its relaxation behavior followed a hyperbolic rather than an expo-nential law. According to the hypothesis of biophoton emission originating from a delocalized coherent electromagnetic field and Frohlich's idea of coherent long-range interactions in biological systems, discussions were made on the signifi-cance of photon emission in studying cell communication, biological regulation, living system's relevance to its environ-ment, and also on the relations between the detected photon emission and the coherent electromagnetic field. The de-tected photon emission should be comprehended in the manner of the interactions between the intrinsic fields within the living systems and their environmental external fields.

关键词： photon emission light-induced photon emission chick embryos intact brain brain cells.

Research on critical technology of micro/nano bioparticles manipulation platform based on light-induced dielectrophoresis

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2009年第10期52卷 2831-2839页

作者： NI ZhongHua YI Hong ZHU ShuCun SONG ChunFeng Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing 210096China

On the basis of the research on the status and problems of micro/nano bio-particles manipulation using dielectrophoresis, the theoretical basis and the model simulation of micro/nano bio-particles manipu-lation using light-induced dielectrophoresis were discussed. The space distribution of electric field and dielectrophoresis forces in different heights were also obtained. On this basis, the core component of the micro manipulation system, that is, photoconductive layer of the chip, was completed in the mate-rial selection, fabricating process and performance analysis testing. Then the voltage drop of the sus-pension and the effective voltage frequency spectrum were obtained. Finally, by combining the machine vision detection with real-time tracking system, the micro/nano bio-particles manipulation platform based on the light-induced dielectrophoreisis was established, and then the manipulations for micro/nano bio-particles, such as quick collection, transport, separation, were implemented. This provided a basis for rapid, accurate, and low-cost detection of serious diseases based on the micro-fluidic biochip and early diagnosis.

关键词： light-induced dielectrophoresis micro-fluidic biochip dielectric polarization mechanism separation chip

同方期刊数据库

light-induced Mid-Infrared Emission of Liquid Carbon Tetrachloride and Benzene

在线全文

学校读者我要写书评

暂无评论

American Journal of Analytical Chemistry 2015年第9期6卷 731-745页

作者： Sofya Terpugova Olga Degtyareva Valery Savransky Evgeni Terpugov Natural Sciences Center Prokhorov General Physics Institute Russian Academy of Sciences Moscow Russian Federation Institute of Cell Biophysics Russian Academy of Sciences Pushchino Moscow Region Russian Federation

light-induced infrared emission spectroscopy (LIRES) is a novel technique that permits to receive high-quality spectra in the mid-infrared region. Low-intensity visible light connected to a highly sensitive FTIR spectrometer is more advantageous for studying any samples, including biological samples without any damage. This technique permits obtaining unique information on the molecule structure via vibrational excitation fundamental frequencies, overtones, and combination modes. It also enables a direct observation of vibrational radiation transitions in vibrationally excited molecules as well as the channels of vibration energy redistribution, which is not allowed with any other method. In this work, the LIRES is being tested as a technique for studying of vibrationally-excited molecules of carbon tetrachloride and benzene in the liquid phase. On the other hand, using transparent liquids, we had tried to understand some of the physical phenomena that can drive emission in mid-IR. The characteristics of the infrared emission of both liquid species produced by different wavelength radiation from various types of light systems (100 - watt Xe-lamp and Nd:YAG laser;lambda = 1064 nm (8 mW) and lambda = 532 nm (4 mW)) are presented. We demonstrated that the IR-signal, as well as spectral properties of carbon tetrachloride and benzene, was dependent on the wavelength and power of excitation beam. Results obtained with different light sources show that the visible light produces a nonlinear IR-emission signal in transparent liquids. We believe that the visible light is the source of the nonlinear response and is producing the vibration excitation as well as photostimulated transformations of the molecules possessing the high activity for the nonlinear response.

关键词： FT-IR Emission Spectroscopy light-induced Mid-Infrared Emission Carbon Tetrachloride Benzene Xe-Lamp Nd:YAG Laser

light-induced Activation of c-Met Signaling by Photocontrolled DNA Assembly

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

Light-Induced Activation of c-Met Signaling by Photocontroll...

Advantage of Introducing Quantitative light-induced Fluorescence in School Dental Checkups

第十一届全国化学生物学学术会议

作者： Shan Chen Juan Li Huang-Hao Yang MOE Key Laboratory for Analytical Science of Food Safety and Biology College of ChemistryFuzhou University

Optical manipulation appears to be a powerful tool for spatiotemporally controlling various cellular ***,a photocontrolled DNA assembly approach is described which enables light-induced activation of cellular signal transduction by triggering protein dimerization.c-Met signaling,which plays a critical role in cancer development and metastasis,is selected as a model. Three kinds of DNA probes are designed,including a pair of receptor recognition probes with adaptors and a blocker probe with a photocleavable linker(PC-linker).By implementing PC-linkers in blocker probes,the designed DNA probes response to light irradiation,which then induces the assembly of receptor recognition probes through adaptor *** proposed photocontrolled DNA assembly approach is effective for regulating c-Met signaling and modulating cellular behaviors,such as cell proliferation and ***,this simple approach may offer a promising strategy to manipulate cell signaling precisely in living cells.

关键词： Aptamers DNA assembly light-induced Signal transduction

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

Health 2018年第8期10卷 1095-1106页

作者： Koji Watanabe Takashi Sasabe Akihiro Nakamura Kosuke Eda Kosuke Tanase Hidefumi Ikeda Naoko Ohata Yukiko Minohara Kenshi Maki Shigeru Watanabe Division of Developmental Stomatognathic Function Science Department of Health Promotion Kyushu Dental University Kitakyushu Japan Division of Pediatric Dentistry Department of Human Development and Fostering Meikai University School of Dentistry Sakado Japan

Background: Caries detection in school oral examinations insufficient accuracy. Objective: To evaluate advantages of introducing quantitative light-induced fluorescence-digital (QLF-D) in school oral examinations. Methods: Experiment No. 1. Early demineralized lesions in the upper and lower incisors and canines were visually inspected by three dentists and by QLF-D. The numbers of tooth planes with early demineralized lesions were compared between the methods. Experiment No. 2. Approximal demineralized lesions in molars were assessed by visual inspection, x-ray imaging, and QLF-D. The numbers of tooth planes with demineralized lesions were compared among the methods. Experiment No. 3. Plaque distribution was evaluated by QLF-D and a traditional staining method. The ratio of the diameter of plaque to tooth crown in the tooth axis direction in each method was calculated. The results were evaluated by Pearson’s correlation coefficient analysis and Bland-Altman plot. Results: Experiment No. 1. The three dentists found 0.67 tooth planes on average. QLF-D found 22 tooth planes with early demineralized lesions in the same samples. Experiment No. 2. Fourteen approximal tooth planes of molars were found to have demineralized lesions by x-ray imaging. QLF-D detected 71.4% of the tooth planes out of the 14, whereas visual inspection found 7.1%. Experiment No. 3. The Pearson’s correlation coefficient for the evaluations of plaque distribution between the QLF-D and traditional staining methods was 0.77 (P Conclusion: The results support introduction of QLF-D for use in school dental examinations.

关键词： Oral Checkup Early Demineralized Lesion Approximal Demineralized Lesion Quantitative light-induced Fluorescence-Digital

Dark Oscillation of light-induced Absorption in Heavy Reduced Co: KNSBN Crystal

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

Journal of Harbin Institute of Technology(New Series) 1998年第2期5卷 7-9页

作者：李艳秋杨学栋李俊庆

This paper presents dark oscillations of light-indhced absorption in heavy reduced Co: KNSBN crystal, points out there are double carriers and multiple traps in the crystal and explains the experimental results with t... 详细信息

关键词： light-induced absorption oscillation

light Inducing the Geometric Conversion of NiO_(6) to Trigger a Faster Oxygen Evolution Reaction Pathway:The Coupled Oxygen Evolution Mechanism

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2023年第2期6卷 408-410页

作者： Hao Wang Siyu Lu Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China

Developing highly active and robust oxygen evolution reaction(OER)electrocatalysts is still a critical challenge for water electrolyzers and metal-air *** the dynamic evolution of the intermediate and charge transfer during OER and developing a clear OER mechanism is crucial to design high-performance OER *** in Nature,Xue and colleagues revealed a new OER mechanism,coupled oxygen evolution mechanism(COM),which involves a switchable metal and oxygen redox under light irradiation in nickel oxyhydroxide-based *** newly developed mechanism requires a reversible geometric conversion between octahedron(NiO_(6))and square planar(NiO_(4))to achieve electronic states with both“metal redox”and“oxygen redox”during *** asymmetric structure endows NR-NiOOH with a nonoverlapping region between the dz^(2) orbitals and a_(1g)^(*)bands,which facilitate the geometric conversion and enact the COM *** a result,NR-NiOOH exhibited better OER activity and stability than the traditional NiOOH.

关键词： coupled oxygen evolution mechanism geometric conversion light-induced oxygen evolution reaction