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排序方式: 共有103条查询结果,搜索用时 15 毫秒
101.
In the present study,the transesterification of glycerol trioleate was carried out over a basic ionic liquid,1-butyl-3- methylimidazolium hydroxide([Bmim]OH) and an 87.2%yield of methyl ester was achieved.The product was isolated through simple decantation from the biphasic system due to the immiscibility of[BmimJOH with ester.[Bmim]OH can be easily recovered and reused six times without dramatic decrease in ester yield. 相似文献
102.
Kirgöz UA Odaci D Timur S Merkoçi A Pazarlioğlu N Telefoncu A Alegret S 《Bioelectrochemistry (Amsterdam, Netherlands)》2006,69(1):128-131
The modification of a graphite-epoxy composite electrode (GECE) with bacterial cells along with an analytical application are presented. Pseudomonas putida DSM 50026 was used as a biological component and the measurement was based on the respiratory activity of the cells. The optimization of working conditions of resulting biosensor (including pH and temperature) was conducted and the limit of detection was calculated as 7 microM phenol based on the signal to noise ratio. Then the system was applied for xenobiotic detection. Resulting sample signals were found to be very similar with the standard solutions having the same concentration while the recoveries of the spiked samples were close to 100%. 相似文献
103.
Xiaoxin Yang Qiao Zhang Yufeng Liu Mengjie Nian Min Xie Shasha Xie Qinglian Yang Prof. Dr. Suna Wang Prof. Dr. Hui Wei Prof. Dr. Jingui Duan Prof. Dr. Shengyi Dong Prof. Dr. Hang Xing 《Angewandte Chemie (International ed. in English)》2023,62(34):e202303280
Dispersing metal-organic framework (MOF) solids in stable colloids is crucial for their availability and processibility. Herein, we report a crown ether surface coordination approach for functionalizing the surface-exposed metal sites of MOF particles with amphiphilic carboxylated crown ether (CEC). The surface-bound crown ethers significantly improve MOF solvation without compromising the accessible voids. We demonstrate that CEC-coated MOFs exhibit exceptional colloidal dispersibility and stability in 11 distinct solvents and six polymer matrices with a wide range of polarities. The MOF-CEC can be instantaneously suspended in immiscible two-phase solvents as an effective phase-transfer catalyst and can form various uniform membranes with enhanced adsorption and separation performance, which highlights the effectiveness of crown ether coating. 相似文献