相关实验视频
Updated: Jun 17, 2025

09:10
Synthesis of Indoxyl-glycosides for Detection of Glycosidase Activities
Published on: May 27, 2015
6.6K
色染料的生物合成及其在重金属绿色化学和视觉生物传感中的应用
Yan Guo1, Shun-Yu Hu2,3, Can Wu2,4
1National Key Clinical Specialty of Occupational Diseases, Shenzhen Prevention and Treatment Center for Occupational Diseases, Shenzhen 518020, China.
ACS omega
|August 12, 2024
概括
大肠杆菌中的工程酶产生生物传感器的. 这些细菌生物传感器可以以高灵敏度检测重金属污染物,如和,提供可持续的替代方案.
科学领域:
- 生物技术是生物技术.
- 环境科学 环境科学
- 合成生物学 合成生物学
背景情况:
- 微生物发酵为天然色素生产提供了一个可持续的途径,与化学合成形成鲜明对比.
- 颜值测量细菌生物传感器使用视觉颜料来监测环境污染物.
- ,一种天然色素,可以作为生物传感应用中的记者分子.
研究的目的:
- 在大肠杆菌中设计自给自足的形酶,用于生物传感器的开发.
- 通过评估细菌宿主,基质补充和通风来优化印花的生产.
- 为了验证开发的基于的生物传感器,用于检测特定的重金属污染物.
主要方法:
- 在大肠杆菌中的四种形酶 (HbpAv,bFMO,cFMO,rFPMO) 的工程.
- 使用T7 lac和mer促进剂,不同的细菌宿主,l-三酸水平和通风来优化粉生产.
- 通过灵敏度和检测范围分析,验证生物传感器检测Hg (II),Pb (II),As (III) 和Cd (II) 的性能.
主要成果:
- 在特定的促进者法规下,TrxA-bFMO酶表现出强大的粉生产能力.
- 优化的条件显著影响了印花的产量,强调了宿主,基板和通风的重要性.
- 色报告器成功检测到Hg{}II降至14.1nM,Pb{}II降至1.5nM,As{}III降至4.5nM,Cd{}II降至25μM.
- 为每个金属建立了检测范围,显示高灵敏度和选择性,与已建立的报告系统相美.
结论:
- 工程化印花生产酶显示了绿色化学合成的巨大潜力.
- 异种蓝生物合成使得开发出新的,具有成本效益的细菌生物传感器,用于视觉污染物监测.
- 这些生物传感器提供了诸如零背景噪声和适合小型设备应用的优势.
相关概念视频
Applications of IR Spectroscopy: Overview
523
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
523
Complexometric Titration: Overview
6.2K
Complexometric titration involves the formation of a complex by reacting a metal ion with one or more ligands. A visual indicator often detects the end point of a complexometric titration. It is added to the metal solution before the titration, forming a stable metal–indicator complex and imparting color to the solution. As the titration approaches the equivalence point, the excess of the added ligand displaces the indicator from the metal–indicator complex, releasing the free...
6.2K
Photoluminescence: Applications
385
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
385
UV–Vis Spectroscopy of Conjugated Systems
6.9K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent...
One of the factors influencing λmax is the extent...
6.9K
Effects of EDTA on End-Point Detection Methods
269
Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
269

