Publications by authors named "R J Dodson"
Article Synopsis
- The text discusses California's Proposition 65, which aims to reduce consumer exposure to toxic chemicals by creating a list of harmful substances and discouraging businesses from using them.
- The study evaluates national biomonitoring data to determine whether Prop 65 has successfully reduced exposure to these chemicals, focusing on changes in blood and urine concentrations among participants over time.
- Results indicate that while the concentration of listed chemicals like Bisphenol A (BPA) declined, some non-listed but related chemicals (like Bisphenol S) increased, suggesting businesses may be substituting one harmful chemical for another.
Article Synopsis
- Bromochloro alkanes (BCAs) are newly identified flame retardants similar to other Persistent Organic Pollutants and have been found in environmental samples for the first time, yet no standard methods for their quantification exist.
- This study involves the synthesis of 16 custom standards to explore quantification strategies for BCAs in indoor dust, achieving an average measurement accuracy of 81% and meeting EU accuracy criteria in 89% of cases during fortification trials.
- Despite these advancements, applying the quantification method to actual dust samples showed a low correlation with the prototype standards, highlighting the need for more diverse mixture standards for reliable BCA quantification in environmental samples.
From 1954 to 1983, a vermiculite processing facility operated near the Honolulu airport and processed raw material from the Libby, Montana mine, which is now well known for the high asbestos content of its clay deposits. The factory was closed in 1983 due to health hazard concerns, and remediation was performed in 2001 as part of the Libby mine superfund project. However, because of close proximity of the closed-down facility to residential areas of metropolitan Honolulu, some concerns remain regarding the possible environmental persistence of the harmful contaminant.
View Article and Find Full Text PDFIntroduction: Tissue from a 77-year-old man diagnosed with mesothelioma was referred with a request for identification of the presence of fibrous structures in tissue samples. The individual's work history including working as a "mucker" at a specific "industrial" talc mine.
Methods: Ferruginous bodies in the tissue digests as well as asbestos fibers were found.
Article Synopsis
- - Bromochloro alkanes (BCAs) are flame retardants with potential environmental risks similar to polychlorinated alkanes (PCAs), which are restricted as harmful Persistent Organic Pollutants (POPs).
- - A new analytical method utilizing advanced mass spectrometry was developed to study BCAs in indoor dust, demonstrating effective recovery rates of BCA compounds from dust samples.
- - Analysis of 59 indoor dust samples from six countries revealed the presence of BCAs only in seven samples from the U.S., suggesting varying exposure levels across different regions, with specific carbon chain lengths and halogenation profiles identified.