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排序方式: 共有240条查询结果,搜索用时 15 毫秒
1.
Leendert Vergeynst Herman Van Langenhove Pieter Joos Kristof Demeestere 《Analytica chimica acta》2013
Uniform guidelines for the data processing and validation of qualitative and quantitative multi-residue analysis using full-spectrum high-resolution mass spectrometry are scarce. 相似文献
2.
Charif Tamin Denis Chaumont Olivier Heintz Mohamed Adnane 《Surface and interface analysis : SIA》2020,52(12):985-990
This paper aims to estimate the band alignment to CdS/CZTS hetero-interface by direct X-ray photoelectron spectroscopy (XPS) measurements. XPS was used to determinate the valence-band offset (VBO) directly by determining the valence band positions at the hetero-interface. The conduction band offset (CBO) value was estimated based on the band gap measurements by UV/Visible spectroscopy and VBO measurements. The position of valence band (VB) changes close to the CdS-CZTS interface and the CBO is cliff-like. The band alignment diagram indicates that the CdS-CZTS interface heterojunction is type II. 相似文献
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Non-contact protein microarray fabrication using a procedure based on liquid bridge formation 总被引:1,自引:1,他引:0
Michael Hartmann Johan Sjödahl Mårten Stjernström Johan Redeby Thomas Joos Johan Roeraade 《Analytical and bioanalytical chemistry》2009,393(2):591-598
Contemporary microarrayers of contact or non-contact format used in protein microarray fabrication still suffer from a number
of problems, e.g. generation of satellite spots, inhomogeneous spots, misplaced or even absent spots, and sample carryover.
In this paper, a new concept of non-contact sample deposition that reduces such problems is introduced. To show the potential
and robustness of this pressure-assisted deposition technique, different sample solutions known to cause severe problems or
to be even impossible to print with conventional microarrayers were accurately printed. The samples included 200 mg mL–1 human serum albumin, highly concentrated sticky cell adhesion proteins, pure high-salt cell-lysis buffer, pure DMSO, and
a suspension of 5-μm polystyrene beads. Additionally, a water-immiscible liquid fluorocarbon, which was shown not to affect
the functionality of the capture molecules, was employed as a lid to reduce evaporation during microarray printing. The fluorocarbon
liquid lid was shown to circumvent hydrolysis of water-sensitive activated surfaces during long-term deposition procedures. 相似文献
7.
A. Preiss A. Bauer H.-M. Berstermann S. Gerling R. Haas A. Joos A. Lehmann L. Schmalz K. Steinbach 《Journal of chromatography. A》2009,1216(25):4968-4975
An advanced HPLC-photodiode array detection method for the determination of 12 selected highly polar nitroaromatic compounds in ground water samples of ammunition waste sites has been developed and validated. After solid-phase extraction the limits of detection were in the range 0.1–0.5 μg/l. To prove the applicability of the method to other polar nitroaromatic compounds the retention time of another 32 polar compounds under the specified chromatographic conditions were determined and their UV spectra recorded. To review the method, interlaboratory comparisons were performed with a spiked and a real ground water sample. 相似文献
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Wolfgang Muessel Helmut Strobel Maxime Joos Eike Nicklas Ion Stroescu Jiří Tomkovič David B. Hume Markus K. Oberthaler 《Applied physics. B, Lasers and optics》2013,113(1):69-73
We report on the optimization of high-intensity absorption imaging for small Bose–Einstein condensates. The imaging calibration exploits the linear scaling of the quantum projection noise with the mean number of atoms for a coherent spin state. After optimization for atomic clouds containing up to 300 atoms, we find an atom number resolution of $\varDelta_{\rm det}= 3.7$ atoms, mainly limited by photon shot noise and radiation pressure. 相似文献