Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.9K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.9K
Emission Spectra02:39

Emission Spectra

78.6K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
78.6K
IR Spectrum Peak Broadening: Hydrogen Bonding01:23

IR Spectrum Peak Broadening: Hydrogen Bonding

2.2K
The vibrational frequency of a bond is directly proportional to its bond strength. As a result, stronger bonds vibrate at higher frequencies, while weaker bonds vibrate at lower frequencies. The stretching vibration of the strong O–H bond in alcohols and phenols (very dilute solution or gas phase) appears as a sharp peak at 3600–3650 cm−1.
However, the extent of hydrogen bonding influences the observed stretching frequency and band broadening. Intermolecular or intramolecular...
2.2K
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

1.8K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.8K
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

909
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
909
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

3.6K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
3.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Unified and Consistent Structure Growth Measurements from Joint ACT, SPT, and Planck CMB Lensing.

Physical review letters·2026
Same author

A nearby dark molecular cloud in the Local Bubble revealed via H<sub>2</sub> fluorescence.

Nature astronomy·2025
Same author

Constraints on Axions from Patchy Screening of the Cosmic Microwave Background.

Physical review letters·2025
Same author

Dark Photon Limits from Patchy Dark Screening of the Cosmic Microwave Background.

Physical review letters·2024
Same author

A possible direct exposure of the Earth to the cold dense interstellar medium 2-3 Myr ago.

Nature astronomy·2024
Same author

Canonical Hubble-Tension-Resolving Early Dark Energy Cosmologies Are Inconsistent with the Lyman-α Forest.

Physical review letters·2023

Related Experiment Video

Updated: Mar 28, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

27.8K

Neutral Hydrogen Structures Trace Dust Polarization Angle: Implications for Cosmic Microwave Background Foregrounds.

S E Clark1, J Colin Hill1, J E G Peek2

  • 1Department of Astronomy, Columbia University, New York, 10027 New York, USA.

Physical Review Letters
|December 27, 2015
PubMed
Summary

Linear structure in Galactic neutral hydrogen (Hi) closely aligns with magnetic fields, as shown by Planck data. This finding offers a new method for cosmic microwave background research by overcoming dust foreground interference.

More Related Videos

Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

11.1K
Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
09:40

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

14.7K

Related Experiment Videos

Last Updated: Mar 28, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

27.8K
Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

11.1K
Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
09:40

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

14.7K

Area of Science:

  • Astronomy and Astrophysics
  • Cosmology
  • Astrophysics

Background:

  • The interstellar medium's structure and its relationship with magnetic fields are crucial for understanding galactic dynamics.
  • Accurate mapping of the Galactic magnetic field is essential for cosmological studies, particularly for detecting primordial gravitational waves.

Purpose of the Study:

  • To investigate the correlation between the linear structure of Galactic neutral hydrogen (Hi) and the magnetic field orientation.
  • To assess the potential of Hi data as a tool for studying the cosmic microwave background (CMB) and mitigating foreground contamination.

Main Methods:

  • Utilizing high-resolution data from the Galactic Arecibo L-Band Feed Array HI (GALFA-Hi) survey.
  • Comparing Hi structural data with magnetic field orientations derived from Planck 353 GHz polarized dust emission.
  • Cross-correlating template maps using Hi-derived angles, starlight polarization, and Planck data.

Main Results:

  • A strong correlation was found between the linear structure of Galactic neutral hydrogen and the magnetic field orientation.
  • The neutral interstellar medium's structure is more tightly coupled to the magnetic field than previously understood.
  • Hi data provide an independent constraint on Galactic magnetic field orientation at high Galactic latitudes.

Conclusions:

  • Galactic neutral hydrogen structure serves as a reliable tracer of the Galactic magnetic field.
  • Hi data offer a novel approach to constrain dust foregrounds in CMB observations.
  • This research advances the search for B-mode polarization from primordial gravitational waves in the CMB.