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Time-resolved Fluorescence Decay Study of Hematoporphyrin Derivative

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Chinese Physics Letters 1991年第1期8卷 40-43页

作者： liu Wenqing XIA Yuxing liu songhao RRamponi RCubeddu Anhui Iristitute of Optics and Fine Mechanics Academia SinicaHefei 230031 CEQSE-CNR Istituto di Fisicar Politecnico di MilanoItaly

Timefluorescence decays were first performed on hematoporphyrin derivative laser No.3 in buffer at different micelles *** *** lifetime constants,measured with a time-correlated single photon counting system;could be fitted by two or three exponential components with different relative peak amplitudes depending on the observation wavelength^thus indicating the presence of different emitting molecular species and/or of molecular species in different aggregational states.

关键词： porphyrin Fluorescence resolved

Soliton Compression Due to Cross-Phase-Modulation in the Normal Dispersive Optical Fibers

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Chinese Physics Letters 1995年第8期12卷 493-496页

作者： XU Wencheng liu Junmin LIAO Changjun liu songhao Institute of Quantum Electronics Southern China Normal UniversityGuangzhou 510631

A new method is proposed to compress soliton pulses in the normal dispersive optical fibers through cross-phase-modulation of two *** optimum fiber length for optimum compression is obtained for given values of the pu... 详细信息

关键词： fiber optimum soliton

Analytic solutions of self-similar pulse based on Ginzburg-Landau equation with constant coefficients

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Science China(Physics,Mechanics & Astronomy) 2008年第3期51卷 299-306页

作者： FENG Jie XU WenCheng LI ShuXian liu songhao School of Physics&Telecommunication Engineering South China Normal UniversityGuangzhou 510006China Laboratory of Photonic Information Technology School of Information&Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China

Based on the constant coefficients of Ginzburg-Landau equation that considers the influence of the doped fiber retarded time on the evolution of self-similar pulse,the parabolic asymptotic self-similar solutions were obtained by the symmetry reduc-tion algorithm. The parabolic asymptotic amplitude function,phase function,strict linear chirp function and the effective temporal pulse width of self-similar pulse are given in this paper. And these theoretical results are consistent with the numerical simulations.

关键词： gain dispersion parabolic asymptotic self-similarity linear chirp normal group velocity dispersion (GVD) fiber amplifiers

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Suppression of Raman Self-Frequency Shift of Soliton Propagation in Single Mode Optical Fiber

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Chinese Physics Letters 1995年第2期12卷 113-115页

作者： XU Wencheng GUO Qi LIAO Changjun liu songhao Institute of Quantum Electronics South China Normal UniversityGuangzhou 510631

A novel idea is proposed to suppress the soliton self-frequency shift of femtosecond soliton pulse in dispersion-decreasing *** expression of the soliton self-frequency shift as a function of the pulse width and the f... 详细信息

关键词： pulse fiber soliton

昆明地区某奶牛场致犊牛腹泻大肠杆菌的分离鉴定及生物学特性分析

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中国兽医学报 2024年第3期44卷 465-471页

作者：杨静吴玉斯那白木刘凇昊江康峰李小兵云南农业大学动物医学院云南昆明650201 云南省德钦县畜牧水产管理服务中心云南香格里拉674500

为查明昆明地区某奶牛场致犊牛腹泻细菌性病原及其生物学特征,对腹泻犊牛粪便进行细菌分离培养、生化试验和16S rRNA序列分析以鉴定细菌种类,并对分离菌株进行致病性试验、血清型鉴定、毒力基因检测、药敏试验、耐药基因检测和种群分型... 详细信息

为查明昆明地区某奶牛场致犊牛腹泻细菌性病原及其生物学特征,对腹泻犊牛粪便进行细菌分离培养、生化试验和16S rRNA序列分析以鉴定细菌种类,并对分离菌株进行致病性试验、血清型鉴定、毒力基因检测、药敏试验、耐药基因检测和种群分型鉴定。结果显示,从腹泻犊牛粪便中共分离鉴定4株强致病性的大肠杆菌,O3、O4、O103为优势血清型;4株致病性大肠杆菌对庆大霉素、头孢唑林、氯霉素、环丙沙星、诺氟沙星均表现强耐药性,而对丁胺卡拉表现为中度敏感;分离菌株携带blaOXA、blaTEM、aac(6′)-Ib、oqxAB、aadA1共5种耐药基因及fimH、Crl、iucD、astA、hlyE、ompA、ompC、K88、papC等9种毒力基因,且4株致病菌均为B2型大肠杆菌。结果表明,导致昆明地区某奶牛场犊牛腹泻的病原为B2型致病性大肠杆菌,并对临床上常见的抗生素表现较强的耐药性,且携带多种耐药基因与毒力基因。本研究为该奶牛场犊牛腹泻选择有效的治疗药物提供了参考依据。

关键词：犊牛腹泻致病性大肠杆菌血清型耐药基因毒力基因种群分型

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Homeostatic photobiomodulation

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Frontiers of Optoelectronics 2009年第1期2卷 1-8页

作者： Timon Chengyi liu Ruochun liu Ling ZHU Jianqin YUAN Min HU songhao liu Laboratory of Laser Sports Medicine College of Sports Science South China Normal University College of Life South China Normal University Laboratory Center for Sport Science and Medicine Guangzhou Institute of Physical Education School for Information and Optoelectronic Science and Engineering South China Normal University

Photobiomodulation （PBM） is a modulation of laser irradiation or monochromatic light （LI） on biosystems,which stimulates or inhibits biological functions bu does not result in irreducible *** might be of low intensity LI （LIL）(about 10 mW/cm2),or moderate intensity LI （MIL）(10～2–10～3mW/cm2).PBM of LIL or MIL （LPBM or MPBM） is studied from the homeostatic viewpoint in this *** is redefined as the function-specific homeostasis （FSH）,a negative-feedback response of a biosystem which maintains the functionspecific conditions inside *** is classified into two kinds,the FSH-specific PBM （fPBM） and developmenta PBM （dPBM）.For fPBM,there is no PBM of LI on the function in FSH,but there is PBM of LI on the function far from *** can disrupt *** can be found tha LPBM is an fPBM,and whether MPBM is fPBM or dPBM depends on MIL dose and cell *** level LI therapy is just clinical applications of fPBM,so that it is a cellular rehabilitation.

关键词： laser homeostasis rehabilitation photobiomodulation (PBM) phototherapy

Fundamental　Soliton　Compression　due　to　Induced－phase－modulation　in　the　Regime　of　Normal　Group－velocity　Dispersion

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Chinese Journal of Lasers 1995年第4期B4卷 335-342页

作者： XU Wencheng liu Junmin LIAO Changjun, liu songhao(Institute of Quantum electronics,South china Normal University,Guangzhou, 510631, China) South China Normal Univ Guangzhou China

ＦｕｎｄａｍｅｎｔａｌＳｏｌｉｔｏｎＣｏｍｐｒｅｓｓｉｏｎｄｕｅｔｏＩｎｄｕｃｅｄ－ｐｈａｓｅ－ｍｏｄｕｌａｔｉｏｎｉｎｔｈｅＲｅｇｉｍｅｏｆＮｏｒｍａｌＧｒｏｕｐ－ｖｅｌｏｃｉｔｙＤｉｓｐｅｒｓｉｏｎ￥ＸＵＷｅｎｃ... 详细信息

ＦｕｎｄａｍｅｎｔａｌＳｏｌｉｔｏｎＣｏｍｐｒｅｓｓｉｏｎｄｕｅｔｏＩｎｄｕｃｅｄ－ｐｈａｓｅ－ｍｏｄｕｌａｔｉｏｎｉｎｔｈｅＲｅｇｉｍｅｏｆＮｏｒｍａｌＧｒｏｕｐ－ｖｅｌｏｃｉｔｙＤｉｓｐｅｒｓｉｏｎ￥ＸＵＷｅｎｃｈｅｎｇ；ＬＩＵＪｕｎｍｉｎ；ＬＩ...

关键词： soliton compression cross-phase-modulation distributed compressor

Temporal Soliton Propagation in Nonlinear Fiber Gratings

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Chinese Journal of Lasers 1996年第1期B5卷 39-42页

作者： liu Junmain, XU Wencheng, LIAO Changjun, liu songhao(Institute of Quantum Eleclronics, South china Normal Unicersity, Guangzhou 510631, China) South China Normal Univ Guangzhou China

The equation governing the pulse propagation in nonlinear fiber grating in the case of nonresonance is derived. The results show that the equation is a modified nonlinear Schrodinger equation. Not like in the case of resonance, in which the solitons are spatial solitons, the structure support only temporal soliton propagation. Compared with the pulse propagation in monomode fiber, the pulses in nonresonant fiber grating are only added a periodic phase along the propagation distance.

关键词： nonlinear fiber grating temporal and spatial soliton

In vivo experimental study of optical characteristics of human acupuncture points

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Frontiers of Optoelectronics 2011年第2期4卷 223-227页

作者： Yimei HUANG Hongqin YANG Yuhua WANG Shusen XIE Zhouyi GUO songhao liu Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education Fujian Provincial Key Laboratory of Photonic Technology Institute of Laser and Optoelectronics Technology Fujian Normal University Laboratory of Photonic Traditional Chinese Medicine and Key Laboratory of Laser Life Science of Ministry of Education South China Normal University

Effective attenuation coefficients and diffuse reflectance spectra of acupuncture point and non-acupuncture point were measured in vivo before and after the brachial artery was constricted with a *** results showed that the effective attenuation coefficient of acupuncture point was smaller than that of non-acupuncture point. When the brachial artery was constricted, the effective attenuation coefficients of acupuncture point and non-acupuncture point ***, the increasing amplitude of effective attenuation coefficient of acupuncture point was smaller than that of the non-acupuncture point. Diffuse reflectance of acupuncture point was lower than that of non-acupuncture point within the wavelength range of 470 to 600 nm. Both the diffuse reflectance of acupuncture point and nonacupuncture point decreased after the brachial artery was constricted. These experimental results indicated that the optical characteristics of acupuncture point tissues were correlated with the physiologic changes. Therefore, these optical characteristics of acupuncture points would be helpful to study the mechanism of acupuncture meridian.

关键词： effective attenuation coefficient diffuse reflectance spectrum acupuncture point oxy-hemoglobin brachial artery