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Related Concept Videos

Two-Dimensional (2D) NMR: Overview01:12

Two-Dimensional (2D) NMR: Overview

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The 1D NMR spectrum of large and complex molecules like natural products has complicated splitting patterns and overlapping signals, which can be easily interpreted using 2-dimensional (2D) NMR. Unlike 1D NMR, 2D NMR has two frequency axes that provide the coupling information between the nucleus A and nucleus B in a molecule. The process from which 2D spectra are obtained has four steps.
The first step is the preparation period, during which nucleus A is excited with a radiofrequency pulse....
1.6K
2D NMR: Overview of Homonuclear Correlation Techniques01:16

2D NMR: Overview of Homonuclear Correlation Techniques

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Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations between nuclei of the same type within a molecule. It provides information about scalar couplings between adjacent nuclei, which helps determine connectivity and structural information. There are several COSY variants, each with its unique strengths and experimental parameters.
COSY90 is the standard two-dimensional (2D) COSY experiment that...
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2D NMR: Overview of Heteronuclear Correlation Techniques01:18

2D NMR: Overview of Heteronuclear Correlation Techniques

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Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other...
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2D NMR: Homonuclear Correlation Spectroscopy (COSY)01:06

2D NMR: Homonuclear Correlation Spectroscopy (COSY)

2.0K
Homonuclear correlation spectroscopy, or COSY, is a 2-dimensional NMR technique that provides information about coupled protons. Typically, the geminal and vicinal coupling are observed. For example, consider the COSY spectrum of ethyl acetate, where its 1D proton NMR spectrum is plotted along the vertical and horizontal axes with their corresponding chemical shift scale. Three spots on the diagonal corresponding to the three peaks in the 1D proton spectrum are called diagonal peaks. The COSY...
2.0K
Predator-Prey Interactions02:39

Predator-Prey Interactions

21.7K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
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2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

1.5K
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
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Biofunctionalization of Magnetic Nanomaterials
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Multivalent Interactions between 2D Nanomaterials and Biointerfaces.

Zhaoxu Tu1, Guy Guday1, Mohsen Adeli1,2

  • 1Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany.

Advanced Materials (Deerfield Beach, Fla.)
|June 15, 2018
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Summary
This summary is machine-generated.

Two-dimensional (2D) nanomaterials like graphene show promise for biological applications. Understanding their interactions with cells, pathogens, and tissues is key to realizing their full potential and ensuring safety.

Keywords:
2D nanomaterialsbiointerfacesmammalian cellspathogenstissue interactions

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Nanotechnology

Background:

  • Two-dimensional (2D) nanomaterials, especially graphene, possess unique physicochemical properties driving interest in biological applications.
  • A comprehensive understanding of bio-interface interactions is essential for harnessing the biomedical potential of 2D nanomaterials.

Purpose of the Study:

  • To review recent advancements in understanding 2D nanomaterial interactions with biological systems.
  • To focus on cellular uptake, toxicity, long-term fate, and interactions with pathogens, mammalian cells, and tissues.

Main Methods:

  • Literature review summarizing current research on 2D nanomaterial-biointerface interactions.
  • Discussion of cellular uptake mechanisms for graphene derivatives.
  • Analysis of interactions with biological membranes, including bacteria and viruses.

Main Results:

  • Graphene derivatives exhibit specific cellular uptake pathways.
  • Interactions with biological membranes are influenced by the chemical structure and modifications of 2D nanomaterials.
  • Potential health risks associated with 2D nanomaterial exposure are considered.

Conclusions:

  • Further research into 2D nanomaterial interactions with biological systems is crucial for safe and effective biomedical applications.
  • Graphene and other 2D nanomaterials like transition-metal dichalcogenides, transition-metal oxides, and black phosphorus hold significant promise for future medical innovations.