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| 1 | Study on the interaction between diphenhydramine and erythrosin by absorption,fluorescence and resonance Rayleigh scattering spectra显示文摘In pH 4.5 Britton-Robinson(BR)buffer solution,erythrosin(ET)can react with diphenhydramine(DP)to form a 1:1 ion-association complex,which not only results in the change of the absorption spectra,but also results in the great enhancement of resonance Rayleigh scattering(RRS)and the quenching of fluorescence.Furthermore,a new RRS spectrum will appear,and the maximum RRS wavelength was located at about 580 nm.In this work,the spectral characteristics of the absorption,fluorescence and RRS,the optimum conditions of the reaction and the properties of an analytical chemistry were inves- tigated.A sensitive,simple and new method for the determination of DP by using erythrosin as a probe has been developed.The detection limits for DP were 0.0020μg/mL for RRS method,0.088μg/mL for absorption method and 0.094μg/mL for fluorophotometry.There was a linear relationship between the absorbance,RRS and fluorescence intensities and the drug concentration in the range of 0.0067-2.0, 0.29-6.4 and 0.31-3.2μg/mL,respectively.The effects of the interaction of diphenhydramine and erythrosin on the absorption,fluorescence and resonance Rayleigh scattering spectra were discussed. In light polarization experiment,the polarization of RRS at maximum wavelength was measured to be P =0.9779,and it revealed that the RRS spectrum of DP-ET complex consists mostly of resonance scat- tering and few resonance fluorescence.In this study,enthalpy of formation and mean polarizability were calculated by AM1 quantum chemistry method.In addition,the reaction mechanism and the rea- sons for the enhancement of scattering spectra and the energy transfer between absorption,fluores- cence and RRS were discussed. | TANG XiaoLing LIU ZhongFang LIU ShaoPu HU XiaoLi | 2007 | Science China Chemistry2007，50，1： | 4 |
| 2 | Spectrofluorimetric determination of zinc(Ⅱ)with N-salicylidene phenylalanine显示文摘Spectrofluorimetricdeterminationofzinc(Ⅱ)withN-salicylidenephenylalanineLiuShaopu;WangLujun;ZhouGuangming(InstttvteojEnvironm... | Liu Shaopu Wang Lujun Zhou Guangming(Instttvte oj Environmental Chemistry, Souxthwest Mormal University,Chongqing 630715) | 1995 | 西南师范大学学报(自然科学版)1995，20，4： | 3 |
| 3 | Study on the absorption and fluorescence and resonance Rayleigh scattering spectra of Cu (II)-fluoroquinolone chelates with erythrosine and their applications显示文摘In pH 4.2-5.0 Britton-Robinson buffer solution medium, fluoroquinolone antibiotics (FLQs), such as ciprofloxacin (CIP), norfloxacin (NOR), ofloxacin (OF), levofloxacin (LEV), lomefloxacin (LOM), and sparfloxacin (SPA), react with Cu (II) to form chelate cations, which further bind with erythrosine to form the ion association complexes. They can result in the changes of the absorption spectra. Simultane- ously, erythrosine fades obviously and the maximum fading wavelength is located at 526 nm. The fad- ing reactions have high sensitivities. Thus, new spectrophotometries of determination for these drugs are developed. The ion-association reactions result in the quenching of fluorescence, which also have high sensitivities. The detection limits for six antibiotics are in the range of 7.1-12.2 μg·L?1. Furthermore, the reactions can result in the enhancement of resonance Rayleigh scattering (RRS). The maximum scattering peaks of six ion-association complexes are located at 566 nm, and there are two small RRS peaks at 333 nm and 287 nm. The detection limits for fluoroquinolone antibiotics are in the range of 1.70 -3.10 μg·L?1 for RRS method. Among the above three methods, the RRS method has the highest sen- sitivity. In this work, we investigated the spectral characteristics of the absorption, fluorescence and RRS, the optimum conditions of the reactions, and the properties of the analytical chemistry. In addi- tion, the mechanism of reactions were discussed by density function theory (DFT) and AM1 methods. | WANG Jian LIU ZhongFang LIU ShaoPu LIU JiangTao SHEN Wei YI AoEr | 2008 | Science China Chemistry2008，51，1： | 3 |
| 4 | Effect of Fast Cooling Rate on the Microstructure and Mechanical Properties of Low-Carbon High-Strength Steel Annealed in the Intercritical Region显示文摘The effect of fast cooling rate on the microstructure and mechanical properties of low-carbon high-strength steel annealed in the intercritical region was investigated using a Gleeble 1500 thermomechanical simulator and a continuous annealing thermomechanical simulator. The results showed that the microstructure consisted of ferrite and bainite as the main phases with a small amount of retained austenite and martensite islands at cooling rate of 5 and 50 ℃/s, respectively. Fast cooling after continuous annealing affected all constituents of the microstructure. The mechanical properties were improved considerably. Ultimate tensile strength(UTS) increased and total elongation(TEL) decreased with increasing cooling rate in all specimens. The specimen 1 at a cooling rate of 5 ℃/s exhibited the maximum TEL and UTS×TEL(20% and 27 200 MPa%, respectively) because of the competition between weakening by presence of the retained austenite plus the carbon indigence by carbide precipitation, and strengthening by martensitic islands and precipitation. The maximum UTS and YS(1 450 and 951 MPa, respectively) were obtained for specimen 2 at a cooling rate of 50 ℃/s. This is attributed to the effect of dispersion strengthening of fi ner martensite islands and the effect of precipitation strengthening of carbide precipitates. | 李壮 田勇 KANG Shaopu ZHENG Zhen LIU Ming | 2014 | Journal of Wuhan University of Technology(Materials Science)2014，29，3： | 3 |
| 5 | Special characteristics of fluorescence and resonance Rayleigh scattering for cadmium telluride nanocrystal aqueous solution and its interactions with aminoglycoside antibiotics显示文摘CdTe nanocrystals(CdTe NCs) were achieved by reaction of CdCl2 with KHTe solution and were capped with sodium mercaptoacetate.The product was detected by transmission electron microscopy(TEM),high-resolution transmission electron microscopy(HRTEM),energy dispersive spectroscopy(EDS),fluorescence spectra,ultraviolet-visible spectra and X-ray diffraction(XRD).The CdTe NCs are of cubic structure and the average size is about 5 nm.The fluorescence quantum yield of CdTe NCs aqueous solution increased from 37% to 97% after 20 d under room light.The maximum λem of fluorescence changed from 543 nm to 510 nm and the blue shift was 33 nm.CdTe NCs aqueous solution can be steady for at least 10 months at 4℃ in a refrigerator.The resonance Rayleigh scattering(RRS) of CdTe NCs in the aqueous solution was investigated.The maximum scattering peak was located at about 554 nm.The interactions of CdTe NCs with amikacin sulfate(AS) and micronomicin sulfate(MS) were investigated respectively.The effects of AS and MS on fluorescence and RRS of CdTe NCs were analyzed.It was found that AS and MS quenched the photoluminescence of CdTe NCs and enhanced RRS of CdTe NCs.Under optimum conditions,there are linear relationships between quenching intensity(F0-F),intensity of RRS(I-I0) and concentration of AS and MS.The detection limits(3б) of AS and MS are respectively 3.4 ng·mL-1 and 2.6 ng·mL-1 by the fluorescence quenching method,and 15.2 ng·mL-1 and 14.0 ng·mL-1 by the RRS method.The methods have high sensitivity,thus CdTe NCs may be used as fluorescence probes and RRS probes for the detection of aminoglycoside antibiotics. | LI TaiShan LIU ShaoPu LIU ZhongFang HU XiaoLi ZHANG LiPing | 2009 | Science China Chemistry2009，52，1： | 2 |
| 6 | Resonance Rayleigh scattering spectrum for the chelate of lanthanum(Ⅲ) with sodium tanshinon ⅡA silate and its analytical application显示文摘In a pH 3.6―5.0 HAc-NaAc buffer solution, when sodium tanshinon ⅡA silate (STSⅡA) reacts with La(Ⅲ) to form a chelate, the resonance Rayleigh scattering (RRS) intensity can be en-hanced greatly and a new RRS spectrum will appear. The maximum RRS peak is located at 306 nm and the RRS intensity is proportional to the concentration of STSⅡA in a certain range. The method is very sensitive and the detection limit for STSⅡA (3σ/K) is 82.12 ng·mL?1. The optimum reaction condi-tions and the effect of coexisting substances have been investigated. A new, simple and fast method for the determination of STSⅡA based on RRS method is developed. It can be applied to the deter-mination of STSⅡA in the synthesis samples and Nuoxinkang injection. Combined with infrared ab-sorption and NMR spectra, the structure of the chelate and the reasons of RRS enhancement are also discussed. | PENG Jingdong LIU Shaopu LIU Zhongfang SHI Yan | 2006 | Science China Chemistry2006，49，5： | 2 |
| 7 | Establishment of Dynamic Model for Axle Box Bearing of High-Speed Trains Under Variable Speed Conditions显示文摘In this study,a dynamic model for the bearing rotor system of a high-speed train under variable speed conditions is established.In contrast to previous studies,the contact stress is simplifed in the proposed model and the compensation balance excitation caused by the rotor mass eccentricity considered.The angle iteration method is used to overcome the challenge posed by the inability to determine the roller space position during bearing rotation.The simulation results show that the model accurately describes the dynamics of bearings under varying speed profles that contain acceleration,deceleration,and speed oscillation stages.The order ratio spectrum of the bearing vibration signal indicates that both the single and multiple frequencies in the simulation results are consistent with the theoretical results.Experiments on bearings with outer and inner ring faults under various operating conditions are performed to verify the developed model. | Yongqiang Liu Baosen Wang Bin Zhang Shaopu Yang | 2022 | Chinese Journal of Mechanical Engineering2022，35，4： | 2 |
| 8 | Absorption, fluorescence and resonance Rayleigh scattering spectral characteristics of interaction of gold nanoparticle with safranine T显示文摘The interaction between gold nanoparticle and safranine T (ST) has been studied with resonance Rayleigh scattering (RRS) spectra, absorption and fluorescence spectra. In the pH 5 solution, citrate [(H2L)2?] self-assembles on the surface of positively-charged gold nanopar-ticle, which results in the [(Au)n(H2L)m]x? complex. In other words, one of carboxylate oxygens in (H2L)2? moves inward and combines with gold nanoparticle. The other carboxylate oxygens moves outward to form a supermolecular complex anion with x negative charges. Then by virtue of electrostatic attraction, hydrophobic force and charge transfer action, the complex anion binds with ST cation to form a new ion-association complex. Here (H2L)2? acts as a bridge. The forma-tion of the complex results in the significant enhancement of RRS intensity, the appearance of new RRS spectrum, the red shift of plasma absorption band of gold nanoparticle as well as the decrease in the absorbance and fluorescence quenching for safranine T. In this work, the inter-action between gold nanoparticle and ST on the RRS, absorption and fluorescence spectra has been investigated. The reason why RRS intensity increases greatly and the reaction mechanism have been inquired. The results show that RRS spectra can not only be used to study nanopar-ticle and reaction product, but also are a sensitive means to characterize and detect nanoparti-cles. | HE Youqiu LIU Shaopu LIU Qin LIU Zhongfang HU Xiaoli | 2005 | Science China Chemistry2005，48，3： | 2 |
| 9 | Mesh stiffness calculation and vibration analysis of the spur gear pair with tooth crack,considering the misalignment between the base and root circles显示文摘An improved variable cross‐section cantilever beam model for evaluating the time‐varying mesh stiffness(TVMS)of the perfect gear tooth is developed in which the tooth number of driving gear is less than 42 and that of driven is more than 42.The TVMS obtained by the proposed method is compared with the result without considering the misalignment between the base circle and gear root.Four types of root crack models and changes inTVMS of 13‐crack levels are presented.The fault vibration characteristic of a single‐stage spur gear reducer with root crack is ana-lyzed and the correctness is qualitatively verified by the vibration signals of an experimental gearbox with crack or missing failure.The results presented in this paper are of great significance for a deep understanding of the possible causes of vibration and noise of gears and provide a theoretical foundation for the fault diagnosis of the gearbox. | Jingyu Hou Shaopu Yang Qiang Li Yongqiang Liu Jiujian Wang | 2021 | International Journal of Mechanical System Dynamics2021，1，1： | 1 |
| 10 | Reso-nance Rayleigh scattering for an indirect determinationof trace amounts of selenium(IV) with iodide-basic tri-phenylmethane dye systems 显示文摘 | Liu Shaopu Liu Zhongfang Huang Chengzhi | 1998 | Analytical Sciences1998，14，： | 1 |
| 11 | A novel and sensitive turn-on fluorescent biosensor for the DNA detection using Sm3+-modulated glutathione-capped CdTe quantum dots显示文摘 | Yizhong Shen Shaopu Liu Jidong Yang eta1 | 2014 | Sensors and Actuators B2014，199，： | 1 |
| 12 | Nonlinear dynamics of a spur gear pair with time-varying stiffness and backlash based on incremental harmonic balance method显示文摘 | SHEN Yongjun YANG Shaopu LIU Xiandong | 2006 | International Journal of Mechanical Sciences2006，48，11： | 1 |
| 13 | Studyon the ternary system of M0O42-enzyme-PdCl2 by res-onance Rayleigh scattering,second-order scattering andfrequency-doubling scattering spectra and its analyticalapplication显示文摘 | Wang Yaqiong Liu Shaopu Liu Zhongfang | 2013 | Luminescence2013，28，： | 1 |
| 14 | A highly sensitive color reaction for Se(IV) with the iodide-rhodamine B-PVA system显示文摘 | Liu Shaopu Zhou Guangming Huang Zhigui | 1990 | Talanta1990，37，7： | 1 |
| 15 | Resonance Rayleigh scattering spectra for studying the interaction of heparin with some basic phenothiarine dyes and their analytical application显示文摘 | LUO Hongqun LIU Shaopu | 2001 | Anal Chim Acta2001，449，12： | 1 |
| 16 | Resonance light scattering for the determination of trace amounts of cadmium with iodide-rhodamine dye system显示文摘 | LIU Shaopu LIU Zhifang LUO Hongqun | 2000 | Anal Chim Acta2000，407，12： | 1 |
| 17 | Resonance light scattering of chromium (Ⅳ) - iodide - basic triphenylmethane dye systems and their analytical application显示文摘 | LIU Shaopu LIU Qun | 1999 | Anal Chim Acta1999，379，12： | 1 |
| 18 | Nonlinear dynamics of a spur gear pair with time-varying stiffness and backlash based on incremental harmonic balance method显示文摘 | Shen Yongjun Yang Shaopu Liu Xiandong | 2006 | International Journal of Mechanical Sciences2006，48，： | 1 |
| 19 | scattering study of the inclusion complexation of chloramphenicol with β-cyclodextrin显示文摘 | NianBing Li Resonance Rayleigh HongOun Luo ShaoPu Liu | 2005 | Talanta2005，66，2： | 1 |
| 20 | Study on the resonance Rayleigh scattering spectra and resonance non-linear spectra of congo red-amikacin system and its analytical application显示文摘The interaction between congo red (CR) and amikacin (AMK) was studied by resonance Rayleigh scattering (RRS), frequency doubling scattering (FDS) and second-order scattering (SOS) combining with absorption spectrum. In a weak acidic medium, CR combined with AMK to form an ion association complex with the composition ratio of 1∶1 by electrostatic interaction, hydrophobicity and charge transferring effect. As a result, the new spectra of RRS, FDS, and SOS appeared and their intensities were enhanced greatly. The maximum wavelengths of RRS, FDS and SOS were located at 563 nm, 475 nm and 940 nm, and the scattering intensities were proportional to the concentration of AMK. These three methods have very high sensitivities, and the detection limits were 4.0 ng·mL?1 for RRS, 3.6 ng·mL?1 for FDS and 1.9 ng·mL?1 for SOS, respectively. At the same time, the methods have better selectivity. A new method for the determination of trace amounts of AMK with congo red by resonance scattering technique has been developed. The recovery for the determination of AMK in blood serum and urine sample was between 95.5% and 105.5%. In this study, the properties, such as enthalpy of formation, charge distribution and mean polarizability, were calculated by AM1 quantum chemistry method. In addition, the reaction mechanism and the reasons for the enhancement of scattering spectra were discussed. | LIU Shaopu HU Xiaoli LIU Zhongfang | 2006 | Science China Chemistry2006，49，6： | 1 |
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