HPLC method determination of isoliquiritin apioside and isoliquiritin in rat plasma for application in pharmacokinetic study after an oral administration of zhigancao extract [0.03%]
一种用于研究炙甘草口服液给药后血浆中药效成分香豆素类物质异甘草苷和异甘草素的HPLC测定法及其应用
Yan-Yun Yang,Liang Xu,Song-Yao Hao et al.
Yan-Yun Yang et al.
A sensitive HPLC method was developed for the quantitative determination of isoliquiritin apioside (ILA) and isoliquiritin (IL) in rat plasma. After protein precipitation with acetonitrile, chloroform was used to separate lipid-soluble impu...
Capture-SELEX: Selection of DNA Aptamers for Aminoglycoside Antibiotics [0.03%]
_CAPTURE-SELEX：用于氨基糖苷类抗生素的DNA适配体筛选_
Regina Stoltenburg,Nadia Nikolaus,Beate Strehlitz
Regina Stoltenburg
Small organic molecules are challenging targets for an aptamer selection using the SELEX technology (SELEX-Systematic Evolution of Ligans by EXponential enrichment). Often they are not suitable for immobilization on solid surfaces, which is...
Sampling and analysis of odorants and volatile organic compounds in air, water, and soil [0.03%]
空气、水和土壤中气味物质和挥发性有机物的采集与分析
Ki-Hyun Kim,David Parker,Fusheng Li et al.
Ki-Hyun Kim et al.
(1)H and (13)C NMR Assignments of Cytotoxic 3S-1,2,3,4-Tetrahydro-β-carboline-3-carboxylic Acid from the Leaves of Cichorium endivia [0.03%]
刺菜叶四氢-β-碳青霉酸的H和C核磁共振波谱分析及结构鉴定
Fu-Xin Wang,An-Jun Deng,Jin-Feng Wei et al.
Fu-Xin Wang et al.
An amino acid, 3S-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid, was isolated for the first time from the leaves of Cichorium endivia. The complete assignment of its (1)H and (13)C NMR spectroscopic data was carried out also for the fir...
Sri Hartuti,Shinji Kambara,Akihiro Takeyama et al.
Sri Hartuti et al.
A rapid, simple method based on graphite furnace atomic absorption spectrometry is described for the direct determination of arsenic in coal fly ash. Solid samples were directly introduced into the atomizer without preliminary treatment. Th...
On the Primary Ionization Mechanism(s) in Matrix-Assisted Laser Desorption Ionization [0.03%]
矩阵辅助激光解吸电离的主要离子化机制
Laura Molin,Roberta Seraglia,Zbigniew Czarnocki et al.
Laura Molin et al.
A mechanism is proposed for the first step of ionization occurring in matrix-assisted laser desorption ionization, leading to protonated and deprotonated matrix (Ma) molecules ([Ma + H](+) and [Ma - H](-) ions). It is based on observation t...
A green preconcentration method for determination of cobalt and lead in fresh surface and waste water samples prior to flame atomic absorption spectrometry [0.03%]
火焰原子吸收光谱法测定新鲜地表水和废水样品中钴和铅的一种绿色预浓缩方法
Naeemullah,Tasneem Gul Kazi,Faheem Shah et al.
Naeemullah et al.
Cloud point extraction (CPE) has been used for the preconcentration and simultaneous determination of cobalt (Co) and lead (Pb) in fresh and wastewater samples. The extraction of analytes from aqueous samples was performed in the presence o...
LC-MS-MS Measurements of Urinary Creatinine and the Application of Creatinine Normalization Technique on Cotinine in Smokers' 24 Hour Urine [0.03%]
液质联用测定尿肌酐及肌酐归一化技术在吸烟者24小时尿中可替宁检测中的应用研究
Hongwei Hou,Wei Xiong,Xiaotao Zhang et al.
Hongwei Hou et al.
A simple and sensitive high performance liquid chromatography-tandem mass spectrometry (HPLC-ESI-MS-MS) method was developed and validated for the quantification of creatinine in human urine. The analysis was carried out on an Agilent Zorba...
Parameters influencing sulfur speciation in environmental samples using sulfur k-edge x-ray absorption near-edge structure [0.03%]
基于X射线吸收近边结构的S K-边分析环境样品中硫形态分布的影响因素研究
Siwatt Pongpiachan,Kanjana Thumanu,Charnwit Kositanont et al.
Siwatt Pongpiachan et al.
This paper aims to enhance the credibility of applying the sulfur K-edge XANES spectroscopy as an innovative "fingerprint" for characterizing environmental samples. The sensitivities of sulfur K-edge XANES spectra of ten sulfur compound sta...
Evaluation of single column trapping/separation and chemiluminescence detection for measurement of methanethiol and dimethyl sulfide from pig production [0.03%]
单柱捕集/分离和化学发光检测测定猪生产中甲硫醇和二甲基硫化物的评价
Michael Jørgen Hansen,Kei Toda,Tomoaki Obata et al.
Michael Jørgen Hansen et al.
Reduced sulfur compounds are considered to be important odorants from pig production due to their low odor threshold values and low solubility in slurry. The objective of the present study was to investigate the use of a portable method wit...