Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Crossing Over

Crossing Over

Unlike mitosis, meiosis aims for genetic diversity in its creation of haploid gametes. Dividing germ cells first begin this process in prophase I, where each chromosome—replicated in S phase—is now composed of two sister chromatids (identical copies) joined centrally.
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process...

Crossing Over

Crossing Over

Crossing over is the exchange of genetic information between homologous chromosomes during prophase I of meiosis I. Genetic recombination gives rise to allelic diversity in the newly formed daughter cells. In humans, crossing over produces genetically distinct haploid egg and sperm cells that undergo fertilization to produce unique offspring. Before cell division starts, the germ cell’s chromosome(s) undergo duplication in the S phase of the cell cycle. As the cells enter prophase I,...

Monohybrid Crosses

Monohybrid Crosses

Cross-Sectional Research

Cross-Sectional Research

In cross-sectional research, a researcher compares multiple segments of the population at the same time. If they were interested in people's dietary habits, the researcher might directly compare different groups of people by age. Instead of following a group of people for 20 years to see how their dietary habits changed from decade to decade, the researcher would study a group of 20-year-old individuals and compare them to a group of 30-year-old individuals and a group of 40-year-old...

Ion Channels

Ion Channels

The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...

Dihybrid Crosses

Dihybrid Crosses

You might also read

Related Articles

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

Sort by

Same author

Spectral Signatures of Neutral Boron Oxide Clusters Containing Key Structural Units of the Vitreous State.

Journal of the American Chemical Society·2026

Same author

Exploring active learning strategies for excited state dynamics: application to uracil.

Physical chemistry chemical physics : PCCP·2026

Same author

Revisiting the Nature of Low-Lying π Resonances in Microsolvated Uracil.

The journal of physical chemistry letters·2026

Same author

Time resolved probing of the ultrafast excited state dynamics of cis,cis-1,3-cyclooctadiene.

The Journal of chemical physics·2026

Same author

A 10 kHz laser-induced fluorescence system for time-resolved detection of reactive intermediates via proxy measurements.

The Review of scientific instruments·2026

Same author

Partial widths of shape resonances in pyridine and uracil using the stabilization method.

The Journal of chemical physics·2026

Same journal

A rechargeable non-aqueous Mg-O<sub>2</sub> battery based on magnesium peroxide chemistry.

Nature chemistry·2026

Same journal

Setting a direction for molecular motors.

Nature chemistry·2026

Same journal

Driving movement in the field of molecular machines.

Nature chemistry·2026

Same journal

First ladies of chemistry.

Nature chemistry·2026

Same journal

How isoprene connects plants to global climate.

Nature chemistry·2026

Same journal

One-dimensional carbon chains free of end-capping groups.

Nature chemistry·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Feb 1, 2026

Fabrication of the Thermoplastic Microfluidic Channels

Fabrication of the Thermoplastic Microfluidic Channels

Published on: February 3, 2008

Intersystem crossing in the exit channel.

Hongwei Li¹, Alexander Kamasah¹, Spiridoula Matsika²

¹Department of Chemistry, University of Missouri, Columbia, MO, USA.

Nature Chemistry

|December 12, 2018

Summary

This summary is machine-generated.

A novel intersystem crossing mechanism was discovered in the reaction of oxygen atoms with alkylamines. This process involves long-range dipole-dipole interactions, leading to complex formation before product release.

More Related Videos

One-channel Cell-attached Patch-clamp Recording

One-channel Cell-attached Patch-clamp Recording

Published on: June 9, 2014

Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow

Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow

Published on: February 4, 2011

Related Experiment Videos

Last Updated: Feb 1, 2026

Fabrication of the Thermoplastic Microfluidic Channels

Fabrication of the Thermoplastic Microfluidic Channels

Published on: February 3, 2008

One-channel Cell-attached Patch-clamp Recording

One-channel Cell-attached Patch-clamp Recording

Published on: June 9, 2014

Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow

Separating Beads and Cells in Multi-channel Microfluidic Devices Using Dielectrophoresis and Laminar Flow

Published on: February 4, 2011

Area of Science:

Chemical Kinetics
Photochemistry
Reaction Dynamics

Background:

Intersystem crossing (ISC) is crucial in photochemistry, typically enhanced by heavy atoms or long-lived complexes.
Understanding ISC mechanisms is key to controlling chemical reactions and product formation.

Purpose of the Study:

To investigate a new intersystem crossing mechanism in the bimolecular reaction of O(³P) with alkylamines.
To elucidate the role of complex formation and long-range interactions in this reaction pathway.

Main Methods:

Utilized crossed-beam experiments to measure product velocity-flux maps.
Performed multi-reference ab initio calculations to explore potential energy surfaces and interactions.

Main Results:

Observed low translational energy release and isotropic angular distributions, suggesting complex formation.
Calculations revealed no triplet potential energy well, indicating an alternative mechanism.
Identified long-range dipole-dipole interactions and vanishing singlet-triplet splitting in the exit-channel as drivers for ISC.

Conclusions:

Proposed a new ISC mechanism in O(³P) + alkylamine reactions.
This mechanism involves exit-channel interactions rather than pre-existing wells.
The findings offer new insights into radical-radical reaction dynamics and photochemistry.