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Related Concept Videos

Cohesion01:07

Cohesion

Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...
States of Water01:23

States of Water

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...
Disorder of Water Balance01:29

Disorder of Water Balance

Water balance disorders are medical conditions that occur when there is a deviation from the body's water volume or osmolarity, disrupting normal homeostasis and leading todehydration, hypotonic hydration, hyperhydration, edema, or water intoxication.
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
Body Water Content and Fluid Compartments01:19

Body Water Content and Fluid Compartments

Life's biochemical processes occur within aqueous solutions. Solutes are substances that are dissolved within these solutions. The human body contains a variety of solutes, which can differ across various body parts. These can encompass proteins—such as those responsible for clotting and carbohydrate transport—as well as electrolytes. In medicine, an electrolyte is often described as a mineral ion derived from a salt possessing an electric charge. Examples include sodium ions (Na+) and chloride...
Regulation of Water Intake01:25

Regulation of Water Intake

Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
Role of Water in Human Biology01:27

Role of Water in Human Biology

Water is the one of the most significant components of the human body; it plays a crucial role in several physiological activities because of its unique physicochemical properties. Importantly, it helps to regulate body temperature and is the chief component of several body fluids.
Water's Solvent Properties
Since water is a polar molecule with slightly positive and slightly negative charges, ions and polar molecules can readily dissolve in it. Therefore, it is referred to as a solvent, a...

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Related Experiment Video

Updated: May 26, 2026

Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
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Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

Published on: February 17, 2019

Water in a crowd.

Michael D Fayer1

  • 1Department of Chemistry, Stanford University, Stanford, California, USA. fayer@stanford.edu

Physiology (Bethesda, Md.)
|December 16, 2011
PubMed
Summary

Water

Area of Science:

  • Physical Chemistry
  • Biophysics
  • Geochemistry

Background:

  • Water's unique properties are crucial across scientific disciplines, from biology to geology.
  • In natural systems, water exists in complex nanoscopic environments, not as pure bulk liquid.
  • Understanding water's behavior in these confined states is key to many biological and chemical processes.

Purpose of the Study:

  • To investigate how nanoconfinement, interfaces, ions, and organic molecules affect water's hydrogen bonding dynamics.
  • To elucidate the behavior of water in non-bulk environments relevant to natural systems.
  • To provide insights into water dynamics fundamental to processes like protein folding and proton transport.

Main Methods:

  • Ultrafast infrared spectroscopy was employed to probe water's hydrogen bond dynamics.

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Glass Wool Filters for Concentrating Waterborne Viruses and Agricultural Zoonotic Pathogens

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Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
08:49

Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

Published on: February 17, 2019

Glass Wool Filters for Concentrating Waterborne Viruses and Agricultural Zoonotic Pathogens
08:01

Glass Wool Filters for Concentrating Waterborne Viruses and Agricultural Zoonotic Pathogens

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  • Experiments focused on water interacting with interfaces, ions, and organic molecules within nanoscopic environments.

    • Main Results:

    • Observed significant alterations in water hydrogen bond dynamics due to nanoconfinement and interactions.
    • Demonstrated that water's behavior deviates substantially from bulk water under these conditions.
    • Quantified the influence of interfaces, ions, and organic molecules on water's structural and dynamic properties.

    Conclusions:

    • Water's hydrogen bond dynamics are highly sensitive to its surrounding environment at the nanoscale.
    • These findings are critical for understanding water's role in complex biological and geological systems.
    • The study provides a molecular-level understanding of water's adaptive behavior in confined and interacting systems.