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

Overview of Algae01:28

Overview of Algae

62
The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
62
Other Algae01:19

Other Algae

49
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
49
Green Algae01:21

Green Algae

63
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
63
Red Algae01:23

Red Algae

71
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
71
Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

80
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
80

You might also read

Related Articles

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

Sort by
Same author

MAGMA: a Modeling Approach for Growth inhibition of MAcrophytes to predict effects of time variable exposure under laboratory conditions.

Environmental toxicology and chemistry·2025
Same author

Critical biotransformation half-lives of chemicals in air-breathing wildlife to assess food-chain bioaccumulation and biomagnification.

Environmental science. Processes & impacts·2025
Same author

Comparison of absorption and excretion of test compounds in sucking versus chewing pests.

PloS one·2025
Same author

Comparison of visual assessment and quantitative goodness-of-fit metrics on GUTS model fits.

Environmental toxicology and chemistry·2025
Same author

SolBeePop<sub>ecotox</sub>: A Population Model for Pesticide Risk Assessments of Solitary Bees.

Environmental toxicology and chemistry·2024
Same author

Environmental Risk Assessment of Time-Variable Toxicant Exposure with Toxicokinetic-Toxicodynamic Modeling of Sublethal Endpoints and Moving Time Windows: A Case Study with Ceriodaphnia dubia.

Environmental toxicology and chemistry·2024

Related Experiment Video

Updated: Jul 30, 2025

Construction and Setup of a Bench-scale Algal Photosynthetic Bioreactor with Temperature, Light, and pH Monitoring for Kinetic Growth Tests
10:08

Construction and Setup of a Bench-scale Algal Photosynthetic Bioreactor with Temperature, Light, and pH Monitoring for Kinetic Growth Tests

Published on: June 14, 2017

16.4K

A Framework for Algae Modeling in Regulatory Risk Assessment.

Cecilie Rendal1, Johannes Witt2, Thomas G Preuss2

  • 1Jealott's Hill International Research Centre, Syngenta, Bracknell, United Kingdom.

Environmental Toxicology and Chemistry
|May 16, 2023
PubMed
Summary
This summary is machine-generated.

This study validates the Simple Algae Model Extended (SAM-X) for regulatory risk assessment of plant protection products. The model accurately predicts effects of variable exposures, simplifying environmental risk assessments for algae.

Keywords:
Moving time windowsRisk assessmentTKTD modeling

More Related Videos

High-Throughput Metabolic Profiling for Model Refinements of Microalgae
11:07

High-Throughput Metabolic Profiling for Model Refinements of Microalgae

Published on: December 4, 2021

3.8K
Author Spotlight: Scaling Microalgal Biotechnology for Enhanced Biomethane Production
07:34

Author Spotlight: Scaling Microalgal Biotechnology for Enhanced Biomethane Production

Published on: March 22, 2024

2.6K

Related Experiment Videos

Last Updated: Jul 30, 2025

Construction and Setup of a Bench-scale Algal Photosynthetic Bioreactor with Temperature, Light, and pH Monitoring for Kinetic Growth Tests
10:08

Construction and Setup of a Bench-scale Algal Photosynthetic Bioreactor with Temperature, Light, and pH Monitoring for Kinetic Growth Tests

Published on: June 14, 2017

16.4K
High-Throughput Metabolic Profiling for Model Refinements of Microalgae
11:07

High-Throughput Metabolic Profiling for Model Refinements of Microalgae

Published on: December 4, 2021

3.8K
Author Spotlight: Scaling Microalgal Biotechnology for Enhanced Biomethane Production
07:34

Author Spotlight: Scaling Microalgal Biotechnology for Enhanced Biomethane Production

Published on: March 22, 2024

2.6K

Area of Science:

  • Environmental Toxicology
  • Ecotoxicology
  • Risk Assessment

Background:

  • Toxicokinetic-toxicodynamic (TKTD) modeling is increasingly used in regulatory risk assessment for plant protection products.
  • A 2018 European Food Safety Authority (EFSA) opinion recognized several TKTD models as suitable for regulatory use.

Purpose of the Study:

  • To present a validated, stepwise approach for using the Simple Algae Model Extended (SAM-X) for regulatory submissions.
  • To demonstrate the model's capability in predicting effects of time-variable exposures in algae.

Main Methods:

  • Utilized moving time windows within time-variable exposure profiles to create virtual laboratory simulations.
  • Maintained standard Organisation for Economic Co-operation and Development (OECD) test conditions (72-h duration, medium, light, temperature).
  • Proposed a simplified SAM-X version by omitting nutrient dynamics for 72-h toxicity tests.

Main Results:

  • SAM-X successfully predicted effects of time-variable exposures under standard OECD test conditions.
  • The simplified SAM-X version is suitable for simulating 72-h toxicity tests.
  • A risk assessment threshold based on a median exposure profile of 10 was applied.

Conclusions:

  • The proposed framework effectively uses TKTD modeling for algae to assess environmental risk.
  • The validated SAM-X model provides a reliable tool for regulatory submissions concerning plant protection products.
  • This approach facilitates the determination of low-risk exposure levels for aquatic ecosystems.