Articles tagged with Polychlorinated Biphenyls
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Research analyzed blood samples from 1,800 individuals in Sweden, finding links between PFAS and PCB exposure and increased odds of multiple sclerosis. The study also highlighted genetic vulnerability and complex interactions between environmental contaminants and hereditary factors.
Researchers found that pooling data across studies can accurately identify dose-response relationships, particularly for chemicals with low-dose effects. The study suggests that combining individual study data can strengthen conclusions in environmental health research.
A new animal study published in the Journal of the Endocrine Society found that early life exposure to polychlorinated biphenyls (PCBs) may lead to behavioral problems in rats. PCBs, which have been banned for decades, can reprogram a developing neuroendocrine system and cause developmental and hormonal changes.
Researchers found a significant association between storing chemicals in attached garages and increased ALS risk. The study suggests that volatile chemicals released into the living space may contribute to this link.
Research in Frobisher Bay, Nunavut, reveals both local source and long-range transport impacts on marine sediment contaminant levels. Local activities like construction and airport operations contributed to pollutant inputs, while legacy military sites and fossil fuel burning also played a role.
Concentrations of potentially harmful chemical compounds in ISS dust exceed median values in US and Western European home floor dust. The study guides design and construction of future spacecraft by highlighting the importance of material choices.
An animal study suggests that exposure to endocrine-disrupting chemicals like PCBs during pregnancy may lead to impaired cognitive function in future generations, including attention-deficit/hyperactivity disorder-like behaviors. The study found that grandchildren of rats exposed to these chemicals performed worse on behavioral tasks a...
Researchers at Beckman Institute found fetal exposure to PCBs made it harder for mice to recover from sound-related trauma. Oxidative stress appears to be key mediator of the effect, suppressing auditory system's ability to heal.
A recent study published in Nature Communications reports finding Poly-Chlorinated Biphenyls (PCBs) at the bottom of the Atacama Trench in the Pacific Ocean. The discovery highlights the persistence of PCBs, a toxic substance banned globally since the 1970s, in deep-sea environments.
A study by Columbia University's Mailman School of Public Health reveals that Industrial Bio-Test Laboratories produced fraudulent reports on PCB products, claiming they were not carcinogenic. The researchers also found that test conditions were compromised, leading to the indictment and conviction of employees involved.
Researchers discovered how enzymes metabolize chiral PCBs, leading to neurodevelopmental issues. The study found that mirror-image isomers are metabolized differently, causing selective toxicity in humans and animals.
A recent study found high concentrations of perfluoroalkane acids in human milk, with PFOS and PFOA detected in over 90% of samples. The researchers also discovered correlations between PFOA and PFOS levels, as well as geographic and socioeconomic factors influencing body burden.
A new analysis found over 10 million tonnes of PCB-containing materials remain globally, posing public health and environmental threats. The Stockholm Convention's deadline for elimination is nearing, but most countries are not on track to meet it.
Researchers evaluated the toxicological effects of BaP on bay scallops, finding increased immune response-related parameters with time at higher concentrations. The study suggests that BaP dampens the immune response of scallops and decreases their capacity to respond to oxidative stress.
Researchers analyzed polar bear fecal samples and dietary intake to understand how chemical contaminants accumulate inside the body. They found that polar bears store high amounts of fat, leading to higher levels of toxins in their bodies.
Scientists have proposed a new two-step methodology to eliminate polychlorinated biphenyls (PCB) from the environment. The approach involves chemical functionalization, replacing chlorine atoms with hydroxyl groups, followed by thermal destruction at lower temperatures than traditional incineration methods.
A new study found significant variation in PCB concentrations among Icelandic orcas, with those eating mixed diets having up to 9 times higher levels. This contradicts earlier research and highlights the need for individualized assessments of health risks in killer whale populations.
A comprehensive systematic review of epidemiological research found a link between certain endocrine-disrupting chemicals and increased breast cancer risk. For example, DDT, PCBs, and PFOA were associated with higher breast cancer incidence in some studies, while phytoestrogens like genistein showed potential protective effects.
A rapid extraction method for phycocyanobilin, a natural blue chromophore in cyanobacteria, has been developed. This method uses high-temperature and high-pressure conditions to extract PCB from cyanobacterial cells, enabling the use of ethanol as a solvent.
A study by University at Buffalo researchers reveals that common terns in the Great Lakes region are contaminated with legacy pollutants like PCBs, PBDEs and DDT metabolites. The chemicals were found in birds of all ages, including chicks and adults, as well as emerald shiners, a primary food source for the terns.
Researchers detected hydroxylated polychlorinated biphenyls (OH-PCBs) in the fetal brain of a Japanese macaque, revealing their transfer from maternal blood. The study suggests that OH-PCB concentrations may exceed levels that induce adverse effects on neurodevelopment, highlighting the need for further research on human exposure risks.
Researchers isolated fibroblast cells from a stranded finless porpoise to predict the threat of environmental pollutants to its population. The study found that pollutants like PCBs and DDTs induce cell death and can cause cytotoxicity, apoptosis, and reduced cell viability.
A study of Uruguayan children wearing silicone wristbands found an average of 13 pollutants, including industrial and agricultural chemicals banned in the US. The researchers detected pesticides like DDT and brominated flame retardants, highlighting concerns about long-term environmental and health impacts.
A study published in Environmental Science & Technology found that mussels and sediment from Hiroshima Bay contain novel bioaccumulative compounds with high toxicological effects. The researchers identified unknown mixed halogenated compounds with similar physicochemical properties to persistent organic pollutants.
A new review links dozens of environmental chemicals to changes in the gut microbiome, associated with health challenges such as reproductive defects, Type 2 diabetes, and poor immune function. Exposure to bisphenols and phthalates has been linked to altered hormone metabolism and microbial shifts.
A new Boston University School of Public Health study estimates the non-cancer health effects of breathing airborne PCBs around New Bedford Harbor, affecting thyroid hormones in people living close to the harbor. The levels of PCBs in the air are high enough to raise risks of diabetes, low birth weight, and impaired neurodevelopment.
Researchers found that harbor porpoise calves carry a more neurotoxic mixture of PCBs than their mothers, who detoxify themselves by transferring the chemicals through lactation. The study highlights the need to monitor individual chemical composition to better understand the risk posed by these chemicals.
Researchers found that high levels of DDT in Indian immigrants' blood correlated with obesity, liver fat accumulation, and insulin resistance. The study suggests that prior exposure to persistent organic pollutants may contribute to the higher diabetes risk among Asian Indians.
Researchers found that bariatric weight-loss surgery can release toxic chemicals like PCBs and organochlorine pesticides stored in fat into the bloodstream. Patients born before 1976 showed higher levels of these compounds due to greater exposure to environmental toxins.
Researchers at Georgetown University Medical Center found that exposure to polychlorinated biphenyls (PCBs) impairs brain function in mice by activating pathways that neutralize toxins and causing oxidative stress in astrocytes. This study suggests a potential contributing factor to neurodegenerative disorders.
A large Swedish study found a strong association between high blood polychlorinated biphenyl (PCB) levels and premature death. The study, which followed over 1,000 seniors for 10 years, showed that individuals with the highest PCB levels had a 50% excess mortality rate from cardiovascular disease.
Scientists discover hundreds of unrecognized halogenated contaminants in polar bear serum, including polychlorinated biphenyls and perfluoroalkyl sulfonic acids. The study reveals increasing levels of these pollutants over the past two decades, posing potential health risks to the Arctic ecosystem.
A new study models the impact of PCBs on killer whale populations, finding that high concentrations in key regions could lead to collapse within a century. The model simulates accumulation and transfer of the chemical to offspring, tying population size and sustainability to proximity to PCB production.
A new study published in the journal Science reveals that killer whale populations are severely affected by PCBs, with over half of studied populations showing significant declines. The research predicts that these populations may disappear within 30-50 years if current levels of pollution persist.
Levels of some persistent organic pollutants (POPs) regulated by the Stockholm Convention are decreasing in the Arctic, according to an international team of researchers. The biggest decreases were in a byproduct of the pesticide lindane and PCBs, with mean annual declines of 9% and 4% per year across the Arctic region.
A Finnish national birth cohort study linked DDT metabolite exposure to increased autism risk in offspring. Maternal blood analyzed for DDE and PCBs found higher odds of autism with intellectual disability among offspring exposed to elevated DDE levels, persisting after adjusting for confounding factors.
Researchers analyzed the survivability of RNA-containing viruses, discovering that inaccurate genetic copying helps them adapt to adverse conditions. The study found that viruses can repair damaged elements or evolve new properties to compensate for damage, ensuring their survival and persistence.
Scientists detected airborne polychlorinated biphenyl compounds in kitchens, linked to sealant decomposition. Higher levels were found in newer homes and emanated from finished cabinetry.
A study led by Michigan Technological University explores mercury pollution in the Great Lakes, particularly in Michigan's Upper Peninsula. The research focuses on policy scenarios to reduce mercury emissions and provides insights into regional remediation efforts and fish safety for local communities.
Scientists successfully synthesized cyanobacterial photosynthetic pigment PCB in animal cells, enabling convenient use of the PhyB-PIF system for optogenetic control. The development opens up new possibilities for studying intracellular signal transduction and manipulating cellular structures.
A Danish-led study found that microbes in Greenland's ice sheet can resist and degrade globally-emitted pollutants like mercury, lead, and PAHs. The research highlights the need for more attention to the release of anthropogenic contaminants as climate change melts the ice sheets.
Researchers found higher concentrations of airborne PCBs inside schools than outside, posing a concern for cumulative exposure. Inhaling these compounds could lead to higher levels of intake through diet, with combined sources being a cause for worry.
Scientists discover high levels of banned pollutants in deep-sea amphipods, revealing human impact on remote ocean habitats. The findings suggest a legacy of pollution from industrial accidents and waste, emphasizing the need to understand the consequences of contamination.
Reducing exposure to environmental synthetic chemicals by 25% could ward off over 150,000 new cases of diabetes in Europe and save €4.5 billion every year. A 40% reduction in BMI would lead to a 40% decrease in diabetes prevalence among 70-75 year olds.
Research suggests that prenatal exposure to certain organochlorine chemicals may increase the risk of autism spectrum disorder in children. The study found that children born after being exposed to high levels of these chemicals during pregnancy were 80% more likely to be diagnosed with autism.
A new study suggests that fish-flavored cat food could be a contributor to feline hyperthyroidism. The researchers found high levels of toxic compounds in cats' blood samples that likely came from their fish-flavored food. Further work is needed to clarify the link between these metabolites and the disease.
A new study from the University of Rochester found that early life exposures to toxic chemicals like PCBs and DDE reduce infants' responses to vaccines. The research, which analyzed blood samples from over 500 mother-infant pairs in eastern Slovakia, shows that even small changes can lead to long-term immune system dysfunction.
A new study found that teenage exposure to organochlorine pesticides may lead to defective sperm and fertility problems later in life. Researchers analyzed sperm and blood samples from 90 men living in an island community with high pesticide exposure.
Research published in Diabetologia reveals a strong association between early pregnancy exposure to organic pollutants and an increased risk of gestational diabetes. Women with high levels of persistent organic pollutants (POPs) were found to be four times more likely to develop the condition.
Researchers at UGA's Savannah River Ecology Laboratory found toxic chemical Aroclor 1268 in egg and tissue samples of least terns across coastal Georgia, causing adverse effects. The contaminant has spread beyond the Superfund site via the food web, posing a risk to bird populations.
A study led by the Zoological Society of London found that harbour porpoises in European waters are struggling with reproductive failures, with almost 20% of females experiencing stillbirth or foetal death. PCB concentrations in UK porpoises were moderate despite being banned over 30 years ago.
A new study reveals that prenatal exposure to low doses of polychlorinated biphenyls (PCBs) can alter the developing brain in an area involved in metabolism. The effects are apparent even two generations later, with increased body weight observed only in descendants of females exposed to PCBs during pregnancy.
University of Iowa researchers have discovered that switchgrass can remove up to 40% of PCBs from contaminated soils, with a combined treatment boosting removal rates to 47%. The study suggests a natural and sustainable method for reducing the presence of toxic chemicals in the environment.
A new study found that women with high levels of endocrine-disrupting chemicals experience menopause two to four years earlier than those with lower levels. The research analyzed data from 31,575 people and identified 15 chemicals significantly associated with earlier ages of menopause.
A new study by Uppsala University reveals that high levels of PCBs in the blood significantly increase the risk of dying among smokers and former smokers. For non-smokers, no elevated risk was found after eight years.
A clinical trial by UC researchers found that consuming chips with olestra reduces serum polychlorinated biphenyls (PCBs) levels in people exposed to PCBs. Olestra's effect on PCB removal is attributed to solubilizing fat-soluble compounds in the intestine, reducing absorption of these compounds into the body.
Researchers at the University of Southampton are creating a hybrid technology that uses electronic components as chemical sensors on printed circuit boards to provide instant diagnosis. This device could replace traditional diagnostic methods, which are lengthy and costly, allowing for continuous monitoring of disease progression.
Researchers found that changes in a receptor protein called AHR2 may explain how killifish evolved genetic resistance to PCBs. The study suggests that evolution of resistance converges on the same target gene across independent populations.
A study by University of Montreal researcher Maryse Bouchard found a significant association between PCB levels and cognitive abilities among individuals aged 70-84 years. Higher exposure to PCBs in older age groups led to greater diminution in cognition, particularly in women.
Researchers found high concentrations of PCBs, dieldrin, and DDE in river otters, indicating potential risks to human health. The study highlights the need for further research on factors contributing to wildlife exposure to these chemicals.