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61.
Adsorption Studies on Organosilic Acid Polymers We present four organosilic acid polymers containing double-4-ring silicate units cross-linked at different degree by different organosilicon bridges. BET surfaces were determined and adsorption isotherms of n-hexane, benzene, nitrogen and water were measured. All polymers are hydrophobic, one of them behaves microporously, the other are unporous. With organic adsorptives, swelling and adsorption occur simultaneously. Possible relations of microporosity and structure are discussed. 相似文献
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A LC-MS-MS method has been validated for the simultaneous quantification of 11 (fluoro)quinolone antibiotics at the maximum residue level (MRL) in swine kidney. The studied compounds were danofloxacine, cinoxacine, ciprofloxacine, noxacine, enrofloxacine, flumequine, marbofloxacine, nalidixic acid, norfloxacine, ofloxacine and oxolinic acid. The method involves solid-phase extraction of these compounds followed by LC-MS-MS analysis using an electrospray ionisation interface. Limits of quantification < or = 50 microg/kg could be obtained in swine kidney, much lower than every MRL. The validation is discussed. This work was carried out in order to support the European Union policy on consumer health 相似文献
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W. Toussaint 《Fresenius' Journal of Analytical Chemistry》1931,83(1-2):75
Ohne Zusammenfassung 相似文献
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Rico Mia I. Lebedenko Charlotta G. Mitchell Saige M. Banerjee Ipsita A. 《Molecular diversity》2022,26(5):2717-2743
Molecular Diversity - In this work, for the first time, we designed derivatives of beta-D-glucosyloxy-3-hydroxy-trans-stiblene-2-carboxylic acid (GHS), by conjugating GHS with tumor targeting... 相似文献
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Laurent Piccolo Salim NassreddineGuy Toussaint Christophe Geantet 《Journal of chromatography. A》2010,1217(37):5872-5873
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Resonant excitation energy transfer from [Cr(ox)3]3? to [Cr(bpy)3]3+ in the doped 3D oxalate networks [Rh1?xCrx(bpy)3][NaMIII1?yCry(ox)3]ClO4 (ox=C2O4?, bpy=2,2′‐bipyridine, M=Al, Rh) is due to two types of interaction, namely super exchange coupling and electric dipole–dipole interaction. The energy transfer probability for both mechanisms is proportional to the spectral overlap of the 2E→4A2 emission of the [Cr(ox)3]3? donor and the 4A2→2T1 absorption of the [Cr(bpy)3]3+ acceptor. The spin‐flip transitions of (pseudo‐)octahedral Cr3+ are known to shift to lower energy with increasing pressure. Because the shift rates of the two transitions in question differ, the spectral overlap between the donor emission and the acceptor absorption is a function of applied pressure. For [Rh1?xCrx(bpy)3][NaM1?yCry(ox)3]ClO4 the spectral overlap is thus substantially reduced on increasing pressure from 0 to 2.5 GPa. As a result, the energy transfer probability decreases with increasing pressure as evidenced by a decrease in the relative emission intensity from the [Cr(bpy)3]3+ acceptor. 相似文献