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81.
S. Piqueras C. Krafft C. Beleites K. Egodage F. von Eggeling O. Guntinas-Lichius J. Popp R. Tauler A. de Juan 《Analytica chimica acta》2015
Hyperspectral images can provide useful biochemical information about tissue samples. Often, Fourier transform infrared (FTIR) images have been used to distinguish different tissue elements and changes caused by pathological causes. The spectral variation between tissue types and pathological states is very small and multivariate analysis methods are required to describe adequately these subtle changes. 相似文献
82.
Marie Pierre Krafft Françoise Giulieri Jean G. Riess 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-4)
Abstract Phospholipids are known to self-organize into bilayer membranes and liposomes. Recently, much attention has also been focussed on highly ordered cylindrical, bilayer-based hollow microstructures usually called tubules, that form, for example, from diacetylenic phosphatidylcholines [1]. However, despite the potential of these new supramolecular architectures in both fundamental and applied area, only few tubule-forming surfactants have been reported yet. We have shown that the driving force required to form and stabilize coiled membranes in water can be brought by fitting amphiphiles with a single fluorinated chain, without need for rigid segments, hydrogen bonding between polar head or chiral centers [2,3]. 相似文献
83.
Sebastian Dochow Claudia Beleites Thomas Henkel Günter Mayer Jens Albert Joachim Clement Christoph Krafft Jürgen Popp 《Analytical and bioanalytical chemistry》2013,405(8):2743-2746
Three important technical innovations are reported here towards Raman-activated cell sorting. Firstly, a microfluidic chip made of quartz is introduced which integrates injection of single cells, trapping by laser fibres and sorting of cells. Secondly, a chip holder was designed to provide simple, accurate and stable adjustment of chips, microfluidic connections and the trapping laser fibres. The new setup enables to the collection of Raman spectra of single cells at 785 nm excitation with 10 s exposure time. Lastly, a new type of modelling the various background contributions is described, improving Raman-based cell identification by the classification algorithm linear discriminant analysis. Mean sensitivity and specificity determined by iterated 10-fold cross validation were 96 and 99 %, respectively, for the distinction of leucocytes extracted from blood, breast cancer cells BT-20 and MCF-7, and leukaemia cells OCI-AML3. 相似文献
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87.
C. Bisio K. Fajerwerg J. M. Krafft P. Massiani G. Martra 《Research on Chemical Intermediates》2008,34(5-7):565-576
Pt/Cs-BEA materials prepared by a classical ion-exchange procedure using two Cs-BEA supports with different Cs loadings, and a reference acidic Pt/H-BEA, have been studied to investigate the effect of the framework basicity (evaluated by FT-IR of adsorbed CO2) on the state of platinum species after the initial steps (introduction of Pt complex by ion-exchange and subsequent calcination) of the preparation procedure. DR-UV data revealed that the framework basicity affects the structure of the Pt2+ complexes introduced as countercations in the zeolite by ion exchange. FT-IR spectra of adsorbed CO indicated that zeolite basicity rules the fate of platinum species in the subsequent calcination. Hence, in Pt/H-BEA essentially well dispersed Ptδ+ (4≥δ≥1) are present, while PtO x particles progressively prevail as the basic character of the zeolite increases. 相似文献
88.
Design of Highly Stable Echogenic Microbubbles through Controlled Assembly of Their Hydrophobin Shell
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Dr. Lara Gazzera Dr. Roberto Milani Dr. Lisa Pirrie Dr. Marc Schmutz Christian Blanck Prof. Giuseppe Resnati Prof. Pierangelo Metrangolo Dr. Marie Pierre Krafft 《Angewandte Chemie (International ed. in English)》2016,55(35):10263-10267
Dispersing hydrophobin HFBII under air saturated with perfluorohexane gas limits HFBII aggregation to nanometer‐sizes. Critical basic findings include an unusual co‐adsorption effect caused by the fluorocarbon gas, a strong acceleration of HFBII adsorption at the air/water interface, the incorporation of perfluorohexane into the interfacial film, the suppression of the fluid‐to‐solid 2D phase transition exhibited by HFBII monolayers under air, and a drastic change in film elasticity of both Gibbs and Langmuir films. As a result, perfluorohexane allows the formation of homogenous populations of spherical, narrowly dispersed, exceptionally stable, and echogenic microbubbles. 相似文献
89.
Recruitment and Immobilization of a Fluorinated Biomarker Across an Interfacial Phospholipid Film using a Fluorocarbon Gas
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Guang Yang Miriam O'Duill Prof. Véronique Gouverneur Dr. Marie Pierre Krafft 《Angewandte Chemie (International ed. in English)》2015,54(29):8402-8406
Perfluorohexane gas when introduced in the air atmosphere above a film of phospholipid self‐supported on an aqueous solution of C2F5‐labeled compounds causes the recruitment and immobilization of the latter in the interfacial film. When the phospholipid forms a liquid‐condensed Gibbs monolayer, which is the case for dipalmitoylphosphatidylcholine (DPPC), the C2F5‐labeled molecule remains trapped in the monolayer after removal of F‐hexane. Investigations involve bubble profile analysis tensiometry (Gibbs films), Langmuir monolayers and microbubble experiments. The new phenomenon was utilized to incorporate a hypoxia biomarker, a C2F5‐labeled nitrosoimidazole (EF5), in microbubble shells. This finding opens perspectives in the delivery of fluorinated therapeutic molecules and biomarkers. 相似文献
90.
Ines Latka Sebastian Dochow Christoph Krafft Benjamin Dietzek Jürgen Popp 《Laser \u0026amp; Photonics Reviews》2013,7(5):698-731
This review focuses on fiber optic probes for linear and nonlinear Raman spectroscopy, especially for medical applications. It aims at providing an overview over contemporary technology, recent first clinical trials, and helps identifying future developments necessary to bring the emerging technology to clinical end users. After a short introduction to linear and nonlinear Raman spectroscopic modalities, general design considerations will be discussed and compared to common fiber probe setups. Subsequently, examples for medical applications of fiber optic Raman probes will be given concentrating on probes for linear Raman spectroscopy as these devices are technologically more mature compared to their counterparts based on nonlinear Raman spectroscopy. The review also includes a brief summary of first multimodal fiber optic probes and highlights their benefits for clinical applications. Finally, probes are introduced which employ either nonlinear Raman spectroscopy or surface enhanced spectroscopy. 相似文献