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Flame Photometry: Overview01:02

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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
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A fire extinguisher that uses pressurized water relies on fluid dynamics principles to generate a high-velocity stream capable of suppressing flames. The water is stored at a much higher pressure inside the extinguisher than the surrounding atmosphere. This pressure difference forces the water to flow rapidly when the extinguisher is activated, and the behavior of the water as it exits the nozzle can be understood using fundamental equations of fluid dynamics.
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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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Flame Experiments at the Advanced Light Source: New Insights into Soot Formation Processes
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No fire without smoke (particles).

Stephanie M Holm1, John Balmes1

  • 1Department of Medicine, University of California, San Francisco, San Francisco, United States.

Elife
|November 17, 2021
PubMed
Summary
This summary is machine-generated.

Climate change is increasing landscape fires, leading to air pollution that causes lower birthweights in babies from low- and middle-income countries. This highlights a critical public health issue impacting infant development.

Keywords:
child healthclimate changeepidemiologyglobal healthhumanmaternal healthwildfire

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Area of Science:

  • Environmental Health
  • Global Public Health
  • Climate Change Impacts

Background:

  • Landscape fires are increasing globally due to climate change.
  • Air pollution from these fires poses significant health risks.
  • Low- and middle-income countries are disproportionately affected.

Purpose of the Study:

  • To investigate the association between pollution from landscape fires and infant birthweights.
  • To quantify the impact of fire-related air pollution on neonatal outcomes.
  • To highlight the public health consequences in vulnerable regions.

Main Methods:

  • Utilizing epidemiological data from low- and middle-income countries.
  • Analyzing air quality metrics related to landscape fire events.
  • Correlating pollution levels with recorded birthweights of newborns.

Main Results:

  • A significant negative correlation was found between exposure to landscape fire pollution and infant birthweight.
  • Infants born to mothers exposed to higher pollution levels exhibited lower birthweights.
  • The effect was particularly pronounced in low- and middle-income country settings.

Conclusions:

  • Pollution from landscape fires is a detrimental factor affecting infant birthweight in vulnerable populations.
  • Climate change-induced fires exacerbate health disparities, necessitating urgent environmental and public health interventions.
  • Addressing fire pollution is crucial for improving child health outcomes in affected regions.