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

Methods of Sterilization II: Chemical Methods01:30

Methods of Sterilization II: Chemical Methods

9.2K
In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
9.2K
Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

1.0K
Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
1.0K
Chemical Formulas02:52

Chemical Formulas

61.8K
A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural.
61.8K
Chemical Equations03:10

Chemical Equations

82.2K
Chemical equations represent the identities and relative quantities of substances involved in a chemical reaction. The substances undergoing reaction are called reactants, and their formulas are placed on the left side of the equation. The substances generated by the reaction are called products, and their formulas are placed on the right side of the equation. Plus signs (+) separate individual reactant and product formulas, and an arrow (→) separates the reactant and product (left and right)...
82.2K
Experimental Determination of Chemical Formula02:37

Experimental Determination of Chemical Formula

47.7K
The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most concise way of representing this elemental makeup. When a compound’s formula is unknown, measuring the mass of its constituent elements is often the first step in determining the formula experimentally.
47.7K
Types of Chemical Bonds02:37

Types of Chemical Bonds

94.6K
Chemical bonding theories were pioneered by American chemist Gilbert N. Lewis. He developed a model called the Lewis model to explain the type and formation of different bonds. Chemical bonding is central to chemistry; it explains how atoms or ions bond together to form molecules. It explains why some bonds are strong and others are weak, or why one carbon bonds with two oxygens and not three; why water is H2O and not H4O. 
94.6K

You might also read

Related Articles

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

Sort by
Same author

Discovery of novel tyrosinase-inhibitory peptides FW and LAW from bullfrog (Lithobates catesbeianus) muscle protein: In silico screening, inhibition kinetics, gastrointestinal stability, and anti-melanogenic efficacy in zebrafish.

Bioorganic chemistry·2026
Same author

Differential responses of mineral-associated organic carbon and particulate organic carbon upon desertification of the Inner Mongolian grassland.

Frontiers in microbiology·2026
Same author

A continuous-operation sub-Kelvin scanning tunneling microscope with high magnetic field via a remote liquefaction cryogen-free scheme.

The Review of scientific instruments·2026
Same author

Discovery of garlic-derived peptides as natural DPP4 inhibitors: An integrated computational, network pharmacology, and in situ evaluation approach.

Bioorganic chemistry·2026
Same author

miR-495-3p attenuates cerebral ischemia-reperfusion-induced neuronal inflammation and apoptosis by targeting CCL2 expression.

In vitro cellular & developmental biology. Animal·2026
Same author

Comment on 'Antibiotic class comparisons for the treatment of pyelonephritis and complicated urinary tract infections: A systematic review and meta-analysis'.

International journal of antimicrobial agents·2026

Related Experiment Video

Updated: Feb 13, 2026

Determining the Toxicity of UV Radiation and Chemicals on Primary and Immortalized Human Corneal Epithelial Cells
09:31

Determining the Toxicity of UV Radiation and Chemicals on Primary and Immortalized Human Corneal Epithelial Cells

Published on: July 22, 2021

2.6K

Improved UV/O3 method for measuring the chemical oxygen demand.

Gaoyang Le1, Huizhong Yang1, Xiaodong Yu1

  • 1School of Internet of Things Engineering and Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education), Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, China

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|March 13, 2018
PubMed
Summary

A new ultraviolet (UV)/ozone (O3) method enhances chemical oxygen demand (COD) testing in water. This faster, eco-friendly approach improves accuracy for environmental water analysis.

More Related Videos

Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
08:58

Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence

Published on: May 4, 2011

15.2K
Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients
11:23

Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients

Published on: February 23, 2017

14.7K

Related Experiment Videos

Last Updated: Feb 13, 2026

Determining the Toxicity of UV Radiation and Chemicals on Primary and Immortalized Human Corneal Epithelial Cells
09:31

Determining the Toxicity of UV Radiation and Chemicals on Primary and Immortalized Human Corneal Epithelial Cells

Published on: July 22, 2021

2.6K
Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence
08:58

Cerebral Blood Oxygenation Measurement Based on Oxygen-dependent Quenching of Phosphorescence

Published on: May 4, 2011

15.2K
Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients
11:23

Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients

Published on: February 23, 2017

14.7K

Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Water Quality Monitoring

Background:

  • Conventional chemical oxygen demand (COD) determination methods are time-consuming, use toxic reagents, and generate hazardous waste.
  • There is a need for rapid, accurate, and environmentally friendly methods for COD measurement in water.

Purpose of the Study:

  • To develop an improved ultraviolet (UV)/ozone (O3)-based method for on-line COD measurement.
  • To enhance the accuracy of UV/O3-based COD testing by incorporating a support vector machine (SVM) model.
  • To provide a faster and more sustainable alternative to traditional COD analysis.

Main Methods:

  • Development of an on-line COD monitoring device utilizing the UV/O3 oxidation technique.
  • Establishment of a support vector machine (SVM) model to estimate dissolved oxygen and CO2 during oxidation.
  • Systematic investigation of key parameters influencing COD measurement accuracy.

Main Results:

  • The improved UV/O3 method demonstrated enhanced accuracy by integrating sensor data with SVM-estimated dissolved oxygen and CO2 levels.
  • The method successfully determined COD in real environmental water samples, showing superior effectiveness compared to the standard dichromate method.
  • Achieved a rapid assay time of 10-15 minutes per sample, with a detection limit of 0.89 mg/L and a linear range of 1-300 mg/L.

Conclusions:

  • The developed UV/O3-based method offers a significant advancement in COD measurement, overcoming limitations of conventional techniques.
  • This approach provides a faster, more accurate, and environmentally benign solution for on-line water quality monitoring.
  • The method is suitable for practical application in analyzing COD in diverse environmental water matrices.