Ozone Measurement
Ozone Measurement - Related Videos
07:49
Measuring Tropospheric Ozone
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Ozone is a form of elemental oxygen (O3), a molecule of three oxygen atoms bonded in a structure that is highly reactive as an oxidizing agent. Ozone occurs in both the stratosphere and the troposphere levels of the atmosphere. When in the stratosphere (located approximately 10-50 km from the earth’s surface), ozone molecules form to the ozone layer and help prevent harmful UV rays from reaching Earth’s surface. In...
08:17
Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure
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Cited by 7 •
2017
This study describes the successful generation of a new chronic obstructive pulmonary disease (COPD) animal model by repeatedly exposing mice to high concentrations of ozone.
08:54
In Vivo Assessment of Alveolar Macrophage Efferocytosis Following Ozone Exposure
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Cited by 15 •
2019
This manuscript describes a protocol for determining whether exposure to ozone, a criteria air pollutant, impairs alveolar macrophage efferocytosis in vivo. This protocol utilizes commonly used reagents and techniques and can be adapted to multiple models of pulmonary injury to determine effects on alveolar macrophage efferocytosis.
07:07
Lung microRNA Profiling Across the Estrous Cycle in Ozone-exposed Mice
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Cited by 9 •
2019
Here we describe a method to assess lung expression of miRNAs that are predicted to regulate inflammatory genes using mice exposed to ozone or filtered air at different stages of the estrous cycle.
09:46
Production and Measurement of Organic Particulate Matter in the Harvard Environmental Chamber
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Cited by 4 •
2018
This paper describes operation procedures for the Harvard Environmental Chamber (HEC) and related instrumentation for measuring gaseous and particle species. The environmental chamber is used to produce and study secondary organic species produced from the organic precursors, especially related to atmospheric organic particulate matter.
FAQs
Ultraviolet absorption provides a direct optical route for ozone measurement. Near 254 nanometers, instruments measure how much light is attenuated by the sample. The Beer–Lambert law links that attenuation to ozone concentration, allowing the signal to be converted into a quantitative result. This principle supports rapid assessment of changing ozone levels in environmental monitoring.
Chemical and electrochemical approaches determine ozone through reactions rather than ultraviolet absorption. Their shared purpose is to translate ozone’s interaction with a sensing system into a concentration. This gives environmental scientists alternatives to optical instruments when a monitoring design calls for a different detection principle. Comparing methods helps distinguish the measurement mechanism from the environmental question being investigated.
Ozone’s strong absorption near 254 nanometers makes this region useful for optical detection. When ozone removes more ultraviolet light from the measured beam, the resulting attenuation can be related to concentration through the Beer–Lambert law. The wavelength therefore connects an instrument’s light signal with a quantitative environmental result, rather than merely indicating that ozone is present.
A basic ozone-monitoring workflow begins by measuring an environmental sample or ambient air with a field sensor or network instrument. The system detects ozone through ultraviolet absorption or a chemical or electrochemical reaction, then relates the response to concentration. Repeated observations can be compared with weather or emissions changes to identify patterns in environmental conditions.
Ozone measurement can address different environmental problems depending on where and why observations are collected. In the stratosphere, records help track ozone depletion; near the ground, they reveal pollution conditions. The same evidence can also support studies of exposure and ecosystem health, connecting atmospheric chemistry with consequences for people and environmental systems.
Ozone data can inform pollution assessment, exposure studies, regulatory decisions, and evaluation of strategies intended to protect health and the environment. Monitoring records also help identify changes associated with weather or emissions, giving environmental scientists evidence to interpret air-quality conditions and judge whether protective approaches are addressing the conditions they target.