A5100430023- Analytical Chemistry and Chromatography
- Molecular Sensors and Ion Detection
- Microfluidic and Capillary Electrophoresis Applications
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Advanced Proteomics Techniques and Applications
- Atmospheric chemistry and aerosols
- Analytical chemistry methods development
- Chromatography in Natural Products
- Metabolomics and Mass Spectrometry Studies
- Click Chemistry and Applications
- Water Quality Monitoring and Analysis
- Analytical Chemistry and Sensors
- Pharmaceutical and Antibiotic Environmental Impacts
- Effects and risks of endocrine disrupting chemicals
- Mass Spectrometry Techniques and Applications
- Plant-derived Lignans Synthesis and Bioactivity
- Nanoplatforms for cancer theranostics
- Molecular spectroscopy and chirality
- Ferroptosis and cancer prognosis
- Luminescence and Fluorescent Materials
- Laser Design and Applications
- Ubiquitin and proteasome pathways
- Terahertz technology and applications
- Traditional Chinese Medicine Analysis
Guangzhou Chemistry (China)
2023
Chinese Academy of Sciences
2023
University of Chinese Academy of Sciences
2023
Rockefeller University
2019
Shimadzu (China)
2019
Ningxia University
2017-2018
Xuzhou Medical College
2017
University of Birmingham
2000-2001
Abstract An online supercritical fluid extraction with chromatography system could provide sequential and quantitative analysis of lignans in Schisandra chinensis . Supercritical conditions were optimized at 15 MPa, 50°C, 4 min CO 2 adding 1% methanol; the elution volume flow rate set 6 mL mL/min to blow extract out tank completely. The split‐flow was confirmed 2.5%, which determines injection accuracy detection. factors having negative influences on retention system, including sample...
Abstract The graphene oxide (GO) was covalently coupled to the surfaces of silica gel (SiO 2 ) microspheres by amide bond get oxide@silica (GO@SiO ). Then, GO@SiO reduced with hydrazine (rGO@SiO ), and cellulose derivatives were physically coated on rGO@SiO prepare a chiral stationary phase (CSP) for high performance liquid chromatography. Under optimum experimental conditions, eight benzene‐enriched enantiomers separated completely, resolution trans‐stilbene perfectly reached 4.83. Compared...
The yields of CO2 from the reactions HOCO radicals with O2 and NO have been compared using technique time-resolved infrared absorption. In two separate series experiments, generated by (i) broadband ultraviolet photolysis acrylic acid (CH2CHCOOH) (ii) reaction, Cl + HCOOH → HCl HOCO, following pulsed laser Cl2 at 351 nm. latter observed were corrected for loss atoms He ClNO NO. Our measurements on rate yield a value third-order constant (5.1 ± 0.7) × 10−32 cm6 molecule−2 s−1. results main...
A new silver-functionalized silica-based material with a core-shell structure based on silver nanoparticle-coated silica spheres was synthesized, and nanoparticles were modified using strongly bound l-cysteine. l-Cysteine-silver@silica characterized by scanning electron microscopy FTIR spectroscopy. Then, solid-phase extraction method l-cysteine-silver@silica developed successfully used for bisphenol determination prior to HPLC analysis. The results showed that the as an adsorbent exhibited...
Rate constants have been measured at room temperature for the reactions of Cl atoms with formic acid and HOCO radical: + HCOOH → HCl (R1) CO2 (R2)Cl were generated by flash photolysis Cl2 progress reaction was followed time-resolved infrared absorption measurements using tunable diode lasers on that formed either in pair plus (R2), or O2 HO2 (R3)In a separate series experiments, conditions chosen so kinetics formation dominated rate (R2) combined. The results our analysis these experiments...
丛宪玲 a ( 吉林大学中日联谊医院 长春 130033) b 吉林大学化学学院 130061) c 吉林省淋巴外科重点实验室 吉林省淋巴外科工程实验室 d 吉林省记忆与认知障碍疾病工程实验室 130031) 摘要 以萘酰亚胺结构为荧光发色团, 设计开发了一种含 C＝C 双键的、具有分子内电荷转移(ICT)效应的新型水溶性 优化的次氯酸荧光探针 3-(2-氰基丙烯酸乙酯基)-4-羟基-N-正丙基-1,8-萘酰亚胺(NAEC).添加次氯酸后, 探针分子 NAEC 中的 双键被氧化, 生成醛基, 探针 原有的 ICT 效应被破坏, 产生荧光信号.经核磁、质谱、荧光发 射光谱和 UV-Vis 吸收光谱对其结构和检测性能进行了研究
Abstract The steroid hormones have attracted increasing attentions in aquatic environment because of their endocrine disrupting effects at trace concentrations. In this work, amphiphilic solid phase extraction material divinylbenzene‐ N‐vinyl‐2 ‐pyrrolidinone polymer microsphere was synthesized by free radical polymerization. adsorption 4 aqueous solution prepared determined high‐performance liquid chromatography‐tandem mass spectrometry method. When methyl cellulose and sodium dodecyl...
Experimental studies on a tunable efficient high-efficient pulsed NH<sub>3</sub> terahertz (THz) lasers pumped by TEA CO<sub>2</sub> are presented. When is the different lines with lasers, generation of radiations discussed. The 9R(08), 9P(20), 10R(14), 10R(08), and 10R(06). To improve THz laser energy photon conversion efficiency, higher power can effectively efficiency. 9P(20) 9.68 J 4.12 pump NH<sub>3</sub>, corresponding efficiencies 0.28% 0.19%, increasing factor about 1.5. as high...