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相关概念视频

Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Applications Of NMR In Biology01:25

Applications Of NMR In Biology

Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics  for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
The...

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相关实验视频

Updated: Jul 19, 2026

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System
06:58

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System

Published on: June 13, 2010

使用有针对性的磁共振超极化生物传感器进行分子成像.

Leif Schröder1, Thomas J Lowery, Christian Hilty

  • 1Department of Chemistry, University of California, Berkeley, CA 94720, USA. dewemmer@lbl.gov

Science (New York, N.Y.)
|October 21, 2006
PubMed
概括

这项研究引入了一种新的磁共振成像方法,使用 xenon 生物传感器进行高灵敏度分子成像. 这种技术显著提高了对比度,并减少了生物医学应用的获取时间.

科学领域:

  • 生物医学成像技术 生物医学成像技术
  • 磁共振光谱学 磁共振光谱学
  • 分子成像学分子成像学

背景情况:

  • 目前的分子磁共振成像技术缺乏足够的灵敏度和对比度.
  • 异生物传感器通过将异原子与特定的生物分子联系起来,为有针对性的分子检测提供了潜力.

研究的目的:

  • 开发一种高灵敏度,高对比度的磁共振成像方法,用于分子成像.
  • 为了利用子生物传感器和化学交换和转移 (CEST) 来增强信号检测.

主要方法:

  • 利用超极化作为生物传感器来准特定的生物分子相互作用.
  • 采用了一种新的读取方案,通过CEST放大信号.
  • 在微分子度下体外证明了目标蛋白的空间分辨率.

主要成果:

  • 与直接检测相比,所需的采集时间减少了3300倍以上.
  • 与之前的CEST方法相比,显示了大约1万倍的灵敏度增强.
  • 成功地以高对比度和分辨率可视化了特定的目标蛋白.

结论:

  • 提出的磁共振方法显著提高了分子成像能力.

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Hyperpolarized 13C Metabolic Magnetic Resonance Spectroscopy and Imaging

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Use of a Multi-compartment Dynamic Single Enzyme Phantom for Studies of Hyperpolarized Magnetic Resonance Agents

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  • 子生物传感器与CEST相结合,显示出作为生物医学应用中的选择性对比剂的巨大潜力.
  • 这项技术代表了针对性分子MRI临床转化的一个关键步骤.