Jove
Visualize
Contact Us

Related Concept Videos

Distributed Loads: Problem Solving01:21

Distributed Loads: Problem Solving

778
Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
778
Carrier-Mediated Transport01:06

Carrier-Mediated Transport

575
Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
575
Short-distance Transport of Resources02:12

Short-distance Transport of Resources

16.6K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
16.6K
Drug Absorption Mechanism: Carrier-Mediated Membrane Transport01:19

Drug Absorption Mechanism: Carrier-Mediated Membrane Transport

4.7K
Certain large, lipid-insoluble drug molecules that resemble amino acids, peptides, or glucose, require specialized carrier proteins to facilitate their diffusion across cell membranes. This transport can occur through either facilitated diffusion, which does not require energy input, or active transport, which does require energy input.
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
4.7K
Active Transport01:14

Active Transport

1.0K
Active transport is a critical biological process that allows cells to move solutes against an electrochemical gradient. This process requires direct energy input and is characterized by its selectivity, saturability, and susceptibility to competitive inhibition.
Primary active transporters, like Na+, K+ and -ATPase, directly utilize ATP to move ions across the membrane. These transporters play significant roles in various physiological processes. For instance, Na+, K+ and -ATPase maintain...
1.0K
Secondary Active Transport01:32

Secondary Active Transport

7.9K
One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme "pump" embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
7.9K

You might also read

Related Articles

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

Sort by
Same journal

Desert lizards modulate nutritional responses to match seasonal biological needs.

Royal Society open science·2026
Same journal

Multi-generational fidelity, ecological and social determinants of roosting in a cooperatively breeding bird (<i>Argya squamiceps</i>).

Royal Society open science·2025
Same journal

Multifaceted polarization and information reliability in climate change discussions on social media platforms.

Royal Society open science·2025
Same journal

Comparing the kinematics related to inflicted head injury between violent shaking of a 6-week-old and a 1-year-old infant surrogate.

Royal Society open science·2025
Same journal

Partner choice increases observed reciprocity-based cooperation but decreases unobserved stake-based cooperation.

Royal Society open science·2025
Same journal

Importation models for travel-related SARS-CoV-2 cases reported in Newfoundland and Labrador during the COVID-19 pandemic.

Royal Society open science·2025
See all related articles
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 Experiment Video

Updated: Sep 29, 2025

Image-based Lagrangian Particle Tracking in Bed-load Experiments
10:32

Image-based Lagrangian Particle Tracking in Bed-load Experiments

Published on: July 20, 2017

9.1K

Bedload transport: beyond intractability.

Basil Gomez1, Philip J Soar2

  • 1Department of Geography and Environment, University of Hawai'i, Mānoa, Honolulu, HI 96822, USA.

Royal Society Open Science
|March 21, 2022
PubMed
Summary
This summary is machine-generated.

A nine-decade study reveals four distinct bedload transport regimes, showing a universal formula is impossible. Understanding river-specific conditions, like bedload size, is crucial for accurate transport rate predictions.

Keywords:
bedload transport efficiencybedload transport ratedimensionless specific stream powerquantile locally weighted scatterplot smoothingsediment availabilitytransport regimes

More Related Videos

Cargo Loading onto Kinesin Powered Molecular Shuttles
09:00

Cargo Loading onto Kinesin Powered Molecular Shuttles

Published on: November 3, 2010

10.6K
Measuring Axonal Cargo Transport in Mouse Primary Cortical Cultured Neurons
04:39

Measuring Axonal Cargo Transport in Mouse Primary Cortical Cultured Neurons

Published on: February 24, 2023

408

Related Experiment Videos

Last Updated: Sep 29, 2025

Image-based Lagrangian Particle Tracking in Bed-load Experiments
10:32

Image-based Lagrangian Particle Tracking in Bed-load Experiments

Published on: July 20, 2017

9.1K
Cargo Loading onto Kinesin Powered Molecular Shuttles
09:00

Cargo Loading onto Kinesin Powered Molecular Shuttles

Published on: November 3, 2010

10.6K
Measuring Axonal Cargo Transport in Mouse Primary Cortical Cultured Neurons
04:39

Measuring Axonal Cargo Transport in Mouse Primary Cortical Cultured Neurons

Published on: February 24, 2023

408

Area of Science:

  • * Hydrology and Sediment Transport: Investigating fluvial geomorphology and sediment dynamics.
  • * Environmental Science: Analyzing river systems and their complex transport processes.

Background:

  • * Decades of field and laboratory data on bedload transport have been compiled and analyzed.
  • * Previous research often sought a universal formula for predicting sediment transport rates in rivers.

Purpose of the Study:

  • * To identify and characterize distinct bedload transport regimes.
  • * To demonstrate the limitations of a universal formula approach for sediment transport.
  • * To develop a data-driven method for analyzing transport rates that accounts for river-specific variability.

Main Methods:

  • * Comprehensive scrutiny of multifarious field and laboratory data spanning nine decades.
  • * Analysis of transport rates in relation to dimensionless specific stream power (ω∗) across different regimes.
  • * Development of a data-driven relationship using multi-year measurements across the entire flow range.

Main Results:

  • * Identification of four distinct bedload transport regimes, refuting the concept of a universal formula.
  • * Demonstration that only in unconstrained supply regimes does transport rate correlate with dimensionless specific stream power (ω∗).
  • * Highlighting the critical role of bed surface characteristics and bedload size in sediment availability and transport, especially near the motion threshold.
  • * Revealing underlying variations in transport rates at a given discharge, often masked by measurement duration and methodology.
  • * Presentation of a new data-driven relationship capable of uncovering nonlinear trends obscured by temporal and spatial variability.

Conclusions:

  • * The search for a universal bedload transport formula is a fallacious pursuit due to inherent complexities and distinct river regimes.
  • * Accurate prediction requires acknowledging and embracing the specificity of rivers within each identified transport regime.
  • * Developing idiomatic, regime-specific relations is essential for advancing the understanding and modeling of bedload transport.