相关实验视频
Updated: Sep 13, 2025

05:51
A Bright NIR-II Fluorescence Probe for Vascular and Tumor Imaging
Published on: March 17, 2023
1.9K
一个高度选择性的开启光传感器用于检测基于黄醇的Hg2+及其在光成像中的应用
Bingxin Zhu1, Lixue Ma1, Xiang Li2
1School of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin, People's Republic of China.
概括
一个新的光传感器在复杂样品中准确检测有毒离子 (Hg2+). 这种工具具有很高的选择性和灵敏性,使可靠的环境和生物监测成为可能.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 生物化学 生物化学
背景情况:
- 离子 (Hg2+) 对生态系统和生物系统构成重大毒性风险.
- 准确而敏感的Hg2+监测对于环境保护和人类健康至关重要.
研究的目的:
- 开发一种新的,高度选择性和灵敏的开启式光传感器,用于Hg2+检测.
- 在复杂的生物和环境矩阵中验证传感器的性能.
主要方法:
- 一种新型光传感器 (HTZ) 的合成,该传感器包含了黄醇和一种硫碳酸盐组.
- 用于检测Hg2+的光谱学,包括线性范围和检测极限的确定.
- 质谱仪用于机械研究.
- 在活细胞和斑马鱼中的体外和体外成像.
- 对真实水样品的分析.
主要成果:
- 该HTZ传感器显示了Hg2+的宽线性范围 (0-1μM) 和超低检测极限 (8.12 nM).
- 传感器表现出高选择性和出色的抗干扰性能.
- 在活细胞和斑马鱼中成功可视化Hg2+,具有良好的生物相容性和低细胞毒性.
- 在真实水样中精确检测Hg2+.
结论:
- 开发的HTZ光传感器是用于敏感和选择性Hg2+检测的有希望的工具.
- 该探头适用于复杂的生物系统和环境样本中的Hg2+实时监测.
- 这项工作有助于推进用于检测有毒金属离子的分析方法.
相关概念视频
Photoluminescence: Applications
487
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...
487
Reporter Genes
11.9K
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
11.9K
Fluorescence and Phosphorescence: Instrumentation
741
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
741
Immunofluorescence Microscopy
11.3K
A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.
11.3K
FISH - Fluorescent In-situ Hybridization
21.3K
Fluorescence in situ hybridization, or FISH, was developed in the early 1980s and has quickly become one of the most widely used techniques in cytogenetics. Labeled probes are used to bind complementary DNA or RNA sequences on a chromosome or in a region within a cell. Earlier, the probes could only be obtained by cloning or reverse transcription of a DNA template. Currently, the probe oligonucleotides can be synthesized synthetically. Additionally, with the advancement of optical techniques,...
21.3K
Labeling DNA Probes
8.4K
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
8.4K

