Related Experiment Video
Updated: Jan 26, 2026
06:41
Author Spotlight: Optimizing Cryo-EM Analysis with CryoSieve for Enhanced Particle Selection Efficiency
Published on: May 10, 2024
2.6K
Insights into particle cycling from thorium and particle data
Phoebe J Lam1, Olivier Marchal
1Department of Marine Chemistry and Geochemistry and.
Annual Review of Marine Science
|September 25, 2014
Summary
Marine particles drive the ocean
Area of Science:
- Oceanography
- Biogeochemistry
- Marine Carbon Cycle
Background:
- Marine particles are key to the biological carbon pump, transferring atmospheric carbon to the deep ocean.
- Particles exist as small, suspended, and large, sinking classes, linked by aggregation and disaggregation.
- Particle dynamics dictate the efficiency of carbon transfer in the ocean.
Purpose of the Study:
- To review current understanding of marine particle dynamics.
- To highlight the role of chemical measurements in studying particle behavior.
- To discuss future research directions in marine particle research.
Main Methods:
- Analysis of radiocarbon, barium, and organic biomarkers on suspended and sinking particles.
- Quantitative rate estimations using thorium isotope measurements.
- Review of chemical measurements to understand particle dynamics.
Main Results:
- Chemical measurements provide qualitative and quantitative insights into particle dynamics.
- Understanding particle aggregation and disaggregation is crucial for carbon pump efficiency.
- Thorium isotopes offer valuable rate estimates for particle processes.
Conclusions:
- Chemical measurements are powerful tools for studying marine particle dynamics.
- Further research is needed to fully elucidate the biological carbon pump's mechanisms.
- Future studies should focus on integrating various chemical tracers for comprehensive analysis.
Related Concept Videos
03:37Subatomic Particles
112.6K
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
112.6K
02:10The Nucleosome Core Particle
14.2K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
14.2K
01:12The Nucleosome Core Particle
2.3K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
2.3K
02:43Basic Postulates of Kinetic Molecular Theory: Particle Size, Energy, and Collision
37.5K
The ideal-gas equation, which is empirical, describes the behavior of gases by establishing relationships between their macroscopic properties. For example, Charles’ law states that volume and temperature are directly related. Gases, therefore, expand when heated at constant pressure. Although gas laws explain how the macroscopic properties change relative to one another, it does not explain the rationale behind it.
37.5K
01:23Equilibrium Conditions for a Particle
2.2K
When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
2.2K
01:21Principle of Linear Impulse and Momentum for a System of Particles
596
In the context of a system of particles moving relative to an inertial frame of reference, the equation of motion is a crucial tool for understanding the dynamics of the system. This equation, which accounts for external forces acting on each particle, plays a fundamental role in describing the system's behavior.
Notably, internal forces between particles, occurring in equal and opposite collinear pairs, cancel out and are not part of the equation of motion. This exclusion simplifies the...
Notably, internal forces between particles, occurring in equal and opposite collinear pairs, cancel out and are not part of the equation of motion. This exclusion simplifies the...
596