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

Bonding and Strength of Aggregate01:12

Bonding and Strength of Aggregate

395
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
395
Formation of Intermediate Filaments00:57

Formation of Intermediate Filaments

3.7K
Intermediate filaments are cytoskeletal proteins with higher tensile strength and flexibility than microfilaments and microtubules. Unlike the other two cytoskeletal proteins, intermediate filament formation lacks the enzymatic activity to hydrolyze nucleotides like ATP and GTP to generate energy for polymerization. Therefore, the formation of intermediate filaments is multistep self-assembly. The involvement of any accessory proteins in intermediate filament formation has not yet been...
3.7K
Formation of Higher-order Actin Filaments01:11

Formation of Higher-order Actin Filaments

3.5K
The polymerization of G-actin monomers into filamentous F-actin is a multi-step process. Once the F-actins are formed, they can bundle together in different arrangements to form higher-order networks and regulate cellular functions. Common examples include the formation of lamellipodia and filopodia at the cell's leading edge by actin reorganization in a migrating cell. The microvilli on the brush border epithelial cells are also formed through the F-actin network.
The high-order actin...
3.5K
Assembly of Cytoskeletal Filaments01:18

Assembly of Cytoskeletal Filaments

26.9K
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
26.9K
Colloids03:22

Colloids

20.4K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
20.4K
Preplaced Aggregate Concrete01:29

Preplaced Aggregate Concrete

299
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
299

You might also read

Related Articles

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

Sort by
Same author

Reversibly-sealable microfluidic platform for multi-molecule gradient delivery to large adherent cell cultures.

Biomedical microdevices·2026
Same author

Data-driven particle dynamics: Structure-preserving coarse-graining for emergent behavior in nonequilibrium systems.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Sandball genesis from raindrops.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

Coupled jet coordination and physical arrangement in salp-inspired multi-robot swimming.

Bioinspiration & biomimetics·2025
Same author

Quantification of flagellar gait changes with combined shape mode analysis and swimming simulations.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2025
Same author

Decoding planetary surfaces by counting cracks.

Proceedings of the National Academy of Sciences of the United States of America·2025

Related Experiment Video

Updated: Dec 29, 2025

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

19.2K

Formation of stable aggregates by fluid-assembled solid bridges.

Ali Seiphoori1,2, Xiao-Guang Ma3,4, Paulo E Arratia5

  • 1Department of Earth & Environmental Science, University of Pennsylvania, Philadelphia, PA 19104.

Proceedings of the National Academy of Sciences of the United States of America
|February 6, 2020
PubMed
Summary

Drying colloidal suspensions creates strong, hierarchical particle clusters. Smaller particles form stabilizing "solid bridges" between larger grains, enhancing material cohesion independent of mineralogy.

Keywords:
aggregate stabilitycohesionevaporationsolid bridges

More Related Videos

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

27.0K
Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops
06:48

Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops

Published on: July 11, 2025

753

Related Experiment Videos

Last Updated: Dec 29, 2025

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

19.2K
The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

27.0K
Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops
06:48

Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops

Published on: July 11, 2025

753

Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Geophysics

Background:

  • Capillary pressure during drying can overcome electrostatic forces in colloidal suspensions.
  • This process leads to the formation of non-equilibrium aggregates, contributing to the strength of geological and industrial materials.
  • The mechanisms behind this aggregation and the resulting cohesive strength are not fully understood.

Purpose of the Study:

  • To investigate the process of evaporation-driven aggregation in natural and synthesized particulates.
  • To analyze the stability of these aggregates upon rewetting.
  • To quantify the bonding strength of the aggregated particles.

Main Methods:

  • Observation of evaporation-driven aggregation.
  • Stability testing under rewetting conditions.
  • Atomic force microscopy to measure interparticle bonding strength.

Main Results:

  • Cohesion is observed at a characteristic length scale of approximately 5 μm, where attractive forces dominate particle weight.
  • In polydisperse mixtures, smaller particles accumulate in capillary bridges, forming solid bridges that stabilize larger grains.
  • Hierarchical clusters with significant cohesive strength are formed, with strength dependent on grain size rather than mineralogy.

Conclusions:

  • Evaporation-driven aggregation creates robust, hierarchical structures in polydisperse particulate systems.
  • The formation of solid bridges by smaller particles is a key mechanism for enhancing cohesion.
  • Understanding this process is crucial for predicting the strength and erodibility of soils and other particulate materials.