- 著者
- Tao YANG Fang ZHU Tianxiao ZHOU Jianzhong CAO Yibo XIE Meiyi ZHANG Yan WANG Dong-Sheng CAO Qinlu LIN Lin ZHANG
- 出版者
- (社)日本分析化学会
- 雑誌
- Analytical Sciences (ISSN:09106340)
- 巻号頁・発行日
- vol.33, no.2, pp.191-196, 2017-02-10 (Released:2017-02-10)
- 参考文献数
- 43
- 被引用文献数
- 7
This study aimed to develop a label-free, sensitive, selective, and environment-friendly fluorescent peptide probe His-His-Trp-His (HHWH) for determining the concentration of copper ion (Cu2+) in aqueous solutions. The results demonstrated that the designed HHWH has a high selectivity and sensitivity for monitoring the concentration of free Cu2+ via quenching of the probe fluorescence upon a binding of Cu2+. The fluorescence intensity of the HHWH had a linear relationship with the concentration of Cu2+ between 10 nM and 10 μM, and the detection limit was 8 nM. Furthermore, HHWH could be regenerated with sulfide ions at least five times. The concentrations of Cu2+ in three different real water samples were detected using this probe, and the results were consistent with the one detected using an atomic absorption spectrometer. Thus, HHWH can be used as an accurate and feasible fluorescent peptide probe for detecting Cu2+ in aqueous solutions.
- 著者
- Yuan ZHANG Tao YANG Beibei LI Jun LI
- 出版者
- The Japanese Society for Dental Materials and Devices
- 雑誌
- Dental Materials Journal (ISSN:02874547)
- 巻号頁・発行日
- vol.42, no.3, pp.449-457, 2023-05-25 (Released:2023-05-30)
- 参考文献数
- 40
The aim of this study was to assess the shear bond strength and durability between plasma-pretreated and polydopamine (PDA)-coated zirconia and titanium. Four groups were prepared according to the different surface treatments (untreated ZrO2, plasma-pretreated ZrO2, PDA-coated ZrO2, and plasma-pretreated and PDA-coated ZrO2 (PP+PDA-ZrO2). The surface topography and roughness, contact angle, and elemental analysis of the coatings of the four groups were investigated, and the bond strength and durability of the specimens were evaluated based on shear bond strength and thermocycle tests. Physical and chemical characterization results confirmed that PDA coatings can be successfully formed on zirconia substrates. The roughness and hydrophilicity were significantly higher in the PP+PDA-ZrO2 group, which demonstrated better shear bond strength and durability between zirconia and titanium. The plasma pretreatment of zirconia substrates can enhance the stability of the PDA coating layer, and hybrid surface modifications can provide several bonding advantages for clinical use.