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

Gravimetry: Inorganic And Organic Precipitating Agents00:49

Gravimetry: Inorganic And Organic Precipitating Agents

1.5K
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
1.5K
Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model01:09

Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model

418
Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
418
Theories of Dissolution: Diffusion Layer Model01:15

Theories of Dissolution: Diffusion Layer Model

882
Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
882
Factors Affecting Dissolution: Particle Size and Effective Surface Area01:23

Factors Affecting Dissolution: Particle Size and Effective Surface Area

981
Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
981
Moisture Content and Bulking of Aggregate01:10

Moisture Content and Bulking of Aggregate

201
The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption.
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
201

You might also read

Related Articles

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

Sort by
Same author

Microbial community patterns in two geochemically contrasting zones within the alkaline lake Bagno dell'Acqua (Pantelleria Island, Italy).

Frontiers in microbiology·2026
Same author

A boost for integrative rethinking of resilience in water-driven transitional ecosystems.

Bioscience·2026
Same author

Comparative Analysis of Bacterial Diversity and Functional Potential in Two Athalassohaline Lagoons in the Monegros Desert (NE Spain).

Microorganisms·2025
Same author

Short-term virus-host interactions and functional dynamics in recently deglaciated Antarctic tundra soils.

ISME communications·2025
Same author

(Dis)connecting the Globe Through Water-Driven Ecological and Biogeochemical Corridors in the Polar-Alpine Biome.

Global change biology·2024
Same author

biomonitoR: an R package for managing ecological data and calculating biomonitoring indices.

PeerJ·2024

Related Experiment Video

Updated: Aug 30, 2025

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
09:38

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

Published on: October 29, 2016

10.5K

Multiple drying aspects shape dissolved organic matter composition in intermittent streams.

Verónica Granados1, Rebeca Arias-Real2, Cayetano Gutiérrez-Cánovas3

  • 1Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Barcelona, Spain.

The Science of the Total Environment
|September 1, 2022
PubMed
Summary

Intermittent rivers and ephemeral streams (IRES) show increased dissolved organic carbon (DOC) with more drying. Drying duration impacts DOC quantity, while drying frequency and last event duration influence its composition.

Keywords:
Dissolved organic carbonDissolved organic matterDrying aspectsFlow intermittenceIntermittent rivers and ephemeral streamsMediterranean streams

More Related Videos

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
09:38

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Published on: January 7, 2019

8.7K
Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers
11:43

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Published on: March 24, 2023

1.4K

Related Experiment Videos

Last Updated: Aug 30, 2025

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
09:38

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

Published on: October 29, 2016

10.5K
Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
09:38

Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures

Published on: January 7, 2019

8.7K
Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers
11:43

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Published on: March 24, 2023

1.4K

Area of Science:

  • Environmental Science
  • Ecology
  • Biogeochemistry

Background:

  • Water availability is crucial for biogeochemical processes in dynamic ecosystems.
  • Intermittent rivers and ephemeral streams (IRES) are globally common and significant for organic matter processing.
  • Climate change and water extraction are expected to increase IRES extent and organic matter processing.

Purpose of the Study:

  • To investigate how different drying aspects influence dissolved organic carbon (DOC) concentration and composition in IRES.
  • To understand the relationship between drying patterns and riverine biogeochemistry.

Main Methods:

  • Studied 35 streams across a flow-intermittence gradient in the NE Iberian Peninsula.
  • Characterized four drying aspects: annual drying duration, annual frequency, duration of the last drying event, and time since the last drying event.
  • Analyzed DOC concentration and composition (humic-like and protein-like compounds).

Main Results:

  • DOC concentration and humic-like compounds increased with intensifying drying conditions.
  • Protein-like compounds decreased along the drying gradient.
  • Annual drying duration primarily affected DOC concentration.
  • Annual drying frequency and the duration of the last drying event jointly influenced DOC composition.

Conclusions:

  • The quantity and composition of dissolved organic matter in streams respond distinctively to the temporal dynamics of drying.
  • Findings aid in predicting organic matter changes in IRES under climate change scenarios.