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Fluoreliminierung aus Graphitfluorid mit Magnesium Defluorination of Graphite Fluoride Applying Magnesium Emst-Christian Koch COMET GmbH Pyrotechnik Apparatebau, Ruhweg 21, D-67307 Göllheim Sonderdruckanforderungen an Dr. E.-Ch. Koch. Fax: +49(0)631-3710537 Z. Naturforsch. 56 b, 512-516 (2001); eingegangen am 5. März 2001 Graphite Fluoride, Defluorination, Magnesium Consolidated stoichiometric mixtures of graphite fluoride (1) and magnesium (2) upon igni­ tion under argon atmosphere (0,1 MPa) yield very high flame temperature of ~ 5600 K as determined by

Zhiqiang Li, Libo Zhang*, Guo Chen, Jinhui Peng, Liexing Zhou, Shaohua Yin and Chenhui Liu Removal of Fluorides and Chlorides from Zinc Oxide Fumes by Microwave Sulfating Roasting Abstract: Dechlorination and defluorination from zinc oxide dust by microwave sulfating roasting was investi- gated in this study. According to proposed reactions in the  process, detailed experiments were systematically conducted to study the effect of roasting temperature, holding time, air and steam flow rates on the efficiency of  the removal of F and Cl. The results show that

occurrence. The enhancement of the photochemical oxidative degradation of perfluorooctane sulfonate upon addition of ferric ions under 254-nm UV and 185-nm vacuum UV (VUV) light was observed for the first time. In the presence of ferric ions (100μM) and at pH 3.0, 85.3% of the initial PFOS (20 μM) was decomposed, with the rate constant of 1.92 d -1 , and the defluorination ratio reached 47.5% within 24 h under 254-nm UV irradiation. The influences of the ferric ion concentration, the solution pH and the UV wavelength on the PFOS photodecomposition were investigated

. 2011;277:106-112. DOI: 10.1016/j.desal.2011.04.010. [47] Lhassani A, Rumeau M, Benjelloun D, Pontie M. Selective demineralization of water by NF, application to the defluorination of brackish water. Water Res. 2001;35:3260-3264. DOI: 10.1016/S0043-1354(01)00020-3.

anesthetics - IL In vitro metabolism of methoxyflurane and halothane in rat liver slices and cell fractions. Biochem. Pharmacol 14, 603 (1965). 11. WARREN, W.A, BAKER F.D. and BELLANTONL J. Enzymatic defluori- nation of methoxyflurane. Biochem. Pharmacol. 25, 723 (1976). 12. MADELIAN, V. and WARREN, W.A. Defluorination of methoxyflurane by a glutathione-dependent enzyme. Res. Comm. Chem. Pathol Pharmacol 16, 385 (1977). 13. BLITT, CD., BROWN, B.R., WRIGHT, B.J., GANDOLFI, AJ. and SIPES, LG. Pulmonary biotransformation of methoxyflurane; an in vitro study in the

linker in PB-22 and 5F-PB-22. Synthetic cannabinoids are extensively metabolized, highly lipophilic compounds, with little to no parent compound found in urine. Phase I biotransformations include, but are not limited to, hydroxylation and carboxylation, often followed by glucuronidation [14–19]. Fluorinated compounds, e.g., AM2201, XLR-11 and 5F-PB-22, undergo defluorination and are subsequently metabolized via pathways similar to their non-fluorinated analogs [19–21]. Compounds in any one structural group often share metabolic pathways forming common metabolites

photochemical properties of FQs have been carried out in order to understand the mechanism of FQ phototoxicity. Beyond these concerns, from a strictly photochemical point of view, an uncommon photoreaction, photodefluorination, has captured the interest of chemists, due to the strength of the C−F bond (dissociation energy ca. 533 kJ mol−1) [14]. It has been sug- * Corresponding author. E-mail: wangwenfeng@sinap.ac.cn 844 P. Zhang et al. Chart 1. The structures of NFX and ANFX. gested that defluorination occurs from the triplet state and the mechanism depends on the

of non destructive depth profiling particularly in those situations (powders, fibres) where variable take off angle experiments are inappropriate. It is worthwhile noting that whilst X—ray degradation under the conditions of a typical experiment are usually negligible, polymeric systems in general are rapidly degraded by the typical electron flux that might be employed in an Auger experiment. Indeed the selective modification (e.g. defluorination) by rastering a low energy (-1 key) electron beam over it is proving to be an interesting field in its own right. X

radiodefluorina- tion, resulting in non-desired high bone accumulation. Re- cently, Magata et al. [17] have shown that several 18F-la- belled 3-chloro-benzylfluorides may exhibit a significantly decreased bone uptake which is indicative of a lower in vivo defluorination rate compared to 18F-labelled benzylfluorides reported earlier. Some compounds showed similar stabilities like aryl fluorides which are known to be highly stable in terms of in vivo radiodefluorination. However, the presented approach did not use 18F-labelled 3-chloro-benzylfluorides capable of conjugation to

the use of PTFE powder in rubber compounds as a solid lubricant for tribological applications. In order to enhance the adhesion properties of PTFE and extend its range of application, many efforts have been made in terms of introducing hydrophilic groups onto the surface of PTFE, such as the hydroxyl group, carboxyl group (4) and sulfonate group (5), to improve its hydrophilicity, adhesion property and ion-exchange performance. Unfortunately, all the methods mentioned above have disadvantages, e.g. in the chemical process, the defluorination with the naphthalene