Opaque Water

Opaque water is water that blocks or strongly scatters light, usually because suspended particles, microorganisms, or dissolved substances reduce transparency. These materials alter light penetration by absorbing or deflecting incoming radiation, creating a darker water column and limiting the depth at which photosynthesis can occur. In biology, opaque water is important for understanding aquatic ecosystems because reduced visibility can affect algae and plant growth, primary productivity, temperature patterns, and the behavior or feeding of aquatic organisms. Measuring water clarity alongside turbidity and particle concentration helps researchers assess habitat conditions, monitor environmental change, and evaluate impacts on freshwater and marine communities.

Opaque Water - Related Videos

Research

JoVE Journal - Behavior
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Shallow Water (Paddling) Variants of Water Maze Tests in Mice

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Cited by 22 •

2013

Mice can swim, but many strains appear to find this activity stressful. To overcome this problem mazes have been devised where escape from shallow water is used to motivate behaviour. These have been demonstrated to support learning at least as good as the traditional and widely used Morris water maze.

Research

JoVE Journal - Biology

Morris Water Maze Experiment

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Cited by 220 •

2008

The Morris water maze is a well-accepted tool used to document the involvement of the hippocampus in a behavioral task.

Education

JoVE Core - Biology

States of Water

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2019

Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart. Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...

The Morris Water Maze

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2023

The Morris water maze is one of the most widely used behavioral tests for studying spatial learning and memory. In the initial phases of this task, rodents must swim to a platform to escape from a pool of water. The platform is then hidden under the water’s surface, so that the animal is required to remember it’s location in order to escape.This simple yet powerful maze design can be used to assay cognitive function, study animal models of neurodegenerative disease, and test potential drug...

Quality of Water

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2024

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

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