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Related Concept Videos

Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground cistern.
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Respiratory Assessment: Purpose and Indications

Respiratory assessment is a cornerstone of nursing assessments, crucial for the early detection of patient deterioration. This evaluation transcends routine procedures, representing a critical skill nurses must master to ensure optimal patient care.
Objectives and Importance:
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Efflorescence in Masonry01:25

Efflorescence in Masonry

Efflorescence in masonry walls appears as a fluffy crystalline powder, often white, resulting from water-soluble salts within the masonry or mortar. When water penetrates the masonry, it dissolves these salts and brings them to the surface, where they are deposited upon evaporation of water.
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Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

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Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
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Related Experiment Video

Updated: Jun 16, 2026

An Air-liquid Interface Bronchial Epithelial Model for Realistic, Repeated Inhalation Exposure to Airborne Particles for Toxicity Testing
09:29

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Radon exhalation from building materials for decorative use.

Jing Chen1, Naureen M Rahman, Ibrahim Abu Atiya

  • 1Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa K1A 1C1, Canada. jing.chen@hc-sc.gc.ca

Journal of Environmental Radioactivity
|February 20, 2010
PubMed
Summary

Radon exposure increases lung cancer risk. This study measured radon exhalation from Canadian building materials, finding slate and granite had higher rates, but overall contributions to indoor radon are typically insignificant with adequate ventilation.

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Published on: March 18, 2019

Area of Science:

  • Environmental Science
  • Public Health
  • Geology

Background:

  • Long-term radon exposure is a known risk factor for lung cancer.
  • Public concern exists regarding radon exhalation from building materials and its impact on indoor air quality.
  • Understanding the radon emission potential of common interior decorative materials is crucial for risk assessment.

Purpose of the Study:

  • To quantify radon exhalation rates from various building materials used in Canadian homes.
  • To assess the potential contribution of these materials to indoor radon levels.
  • To provide data addressing public concerns about radon in building products.

Main Methods:

  • Collected 53 samples of drywall, tile, and granite from the Canadian market.
  • Measured radon exhalation rates using standardized techniques (units: Bq m(-2) d(-1)).
  • Modeled potential indoor radon contribution based on material exhalation rates and house air exchange rates.

Main Results:

  • Radon exhalation rates varied significantly, from non-detectable to 312 Bq m(-2) d(-1).
  • Slate tiles (average 30 Bq m(-2) d(-1)) and granite slabs (average 42 Bq m(-2) d(-1)) exhibited higher exhalation rates compared to ceramic or porcelain tiles.
  • Even high-exhalation materials (300 Bq m(-2) d(-1)) contributed minimally (18 Bq m(-3)) to indoor radon in a well-ventilated house.

Conclusions:

  • While some decorative stones like slate and granite show higher radon exhalation, their overall impact on indoor radon is generally low.
  • Adequate home ventilation is key in mitigating potential radon buildup from building materials.
  • Building materials commonly used for interior decoration pose no significant radon risk in homes with proper air exchange rates.