DioxinsPesticidesDioxin-like compoundsPCBsPolycyclic aromatic hydPoly-Chlorinated BiphenylsCarcinogenicOrganicOrganohalogen compoundsOrganochlorine compoundsAromatic compoundsConcentrationsTetraPollutantsDegradationFlame-retardantsContaminantsPathwaysAbstractToxicChemicalOrthoChemicalsLiquidsSubstancesCongenersOccursEnvironmentalSyntheticExhibitIncreasesStructuresFoundResponsesGroupHighBiologicalPublicationPresentPropertiesAccumulationLightShare similar
Dioxins21
- Dioxins, furans, and polychlorinated biphenyls (PCBs) are a class of similar chlorinated aromatic organic compounds. (cdc.gov)
- Analyzed compound classes included polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins and dibenzofurans, polychlorinated naphthalenes, polybrominated diphenyl ethers and hexabromocyclododecanes. (unibe.ch)
- Due to their longevity and toxicity, dioxins, furans, and polychlorinated biphenyls (PCBs) are regulated compounds globally that need to be closely monitored in food and environmental matrices. (agilrom.ro)
- Magnetic sector mass spectrometry is traditionally used in the analysis of dioxins, furans, and PCBs as these analytes share similar chemical characteristics suitable for selected ion monitoring (SIM). (agilrom.ro)
- TCDD and a number of similar polychlorinated dioxins, dibenzofurans, and coplanar polychlorinated biphenyls (dioxin-like compounds [DLCs]) have been the subject of intense scientific research and frequently controversial environmental and health policies. (progressivereform.net)
- Inadvertent exposures of humans through industrial accidents, occupational exposures to commercial compounds (primarily phenoxyacid herbicides), and through dietary pathways have led to a wide range of body burdens of TCDD, other dioxins, and DLCs, and numerous epidemiological studies have attempted to relate exposures to a variety of adverse effects in humans. (progressivereform.net)
- The main objective of this targeted survey was to provide baseline data regarding the presence and levels of dioxins and dioxin-like compounds in selected high-fat commodities (specifically vegetable oils and cheese) available on the Canadian retail market. (canada.ca)
- Dioxins and dioxin-like compounds are chemical contaminants that have been associated with a wide range of adverse health effects in laboratory animals and humans. (canada.ca)
- Some of the dioxins and dioxin-like compounds have been classified by the International Agency for Research on Cancer (IARC) as known human carcinogens, others as probable human carcinogens, while others are not classifiable as to their carcinogenicity Footnote 1 in humans. (canada.ca)
- The World Health Organization (WHO) considers dioxins and dioxin-like compounds a health concern on a global scale, and has recently re-iterated the need to reduce emissions of, and human exposure to, these persistent organic pollutants. (canada.ca)
- Approximately 90% of a person's exposure to dioxins and dioxin-like compounds occurs through the diet, particularly through the consumption of high-fat animal tissues and dairy products. (canada.ca)
- Due to recent food contamination events outside Canada, dioxins and dioxin-like compounds have gained attention in the media. (canada.ca)
- All samples were analyzed for dioxins and dioxin-like compounds (furans and polychlorinated biphenyls). (canada.ca)
- All oil and cheese samples had detectable levels of one or more dioxins or dioxin-like compounds. (canada.ca)
- Due to the ubiquitous nature of dioxins and dioxin-like compounds in the environment, and the fact that methods of detection are becoming increasingly sensitive, "zero tolerance" is not practical and is not applied by Canada or any major trading partners. (canada.ca)
- No samples in this survey had concentrations of dioxins or dioxin-like compounds in excess of European Union limits for either vegetable oils or dairy products. (canada.ca)
- The levels of dioxins and dioxin-like compounds observed in this survey are unlikely to contribute significantly to the overall exposure of Canadians to these contaminants, and are not likely to be of human health concern. (canada.ca)
- 4 The fires at the site created toxic combustion products, such as polycyclic aromatic hydrocarbons (PAHs), dioxins, volatile organic compounds, and various other known carcinogenic compounds. (cdc.gov)
- Dioxins and dioxin-like compounds measurements were added to polychlorinated biphenyls (PCBs) and organochlorine pesticides to expand the exposure profile in a follow-up to the Anniston Community Health Survey (ACHS II, 2014) and to study diabetes associations. (cdc.gov)
- These compounds are produced unintentionally from many of the same processes that produce dioxins, and also during the production of PCBs. (pops.int)
- Furans are structurally similar to dioxins and share many of their toxic effects. (pops.int)
Pesticides4
- Relative abundance of organochlorine pesticides and polychlorinated biphenyls in adipose tissue and serum of women in Long Island, New York. (aacrjournals.org)
- Anyway, in a recent independent study on fish oils "polychlorinated biphenyls (PCBs), organochlorine pesticides, and other smaller organohalogen compounds, were still present" in two of the three "PCB-free" popular brand commercial oils tested. (itestosterone.com)
- Pesticides and polychlorinated biphenyls were measured in serum, follicular fluid or seminal plasma by gaschromatography and related to sperm quality and pregnancy rates. (springer.com)
- Marine turtles of all species, particularly hawksbill turtles ( Figure 1 ), can contain a variety of toxins including heavy metals (e.g. cadmium and mercury), organic compounds (e.g. pesticides such as chlordane and polychlorinated biphenyls) and biotoxins such as those produced by various blue-green algae on which turtles feed (e.g. lyngbyatoxin A from Lyngbya majuscula ). (who.int)
Dioxin-like compounds1
- Dioxin toxic equivalents (TEQs) were calculated for all dioxin-like compounds. (cdc.gov)
PCBs7
- Structurally similar to polychlorinated biphenyl (PCBs), these compounds are long-lived in the environment and can bioaccumulate throughout the food chain. (chromatographyonline.com)
- Additionally, polybrominated diphenyl ethers (PBDEs), which are brominated aromatic hydrocarbons heavily used as flame-retardants in plastics, possess structural variations similar to PCBs ( Talsness, 2008 ). (frontiersin.org)
- Organochlorine compounds such as 1,1,1-trichloro-2,2-bis(p-chlorophenyl)-ethane (p,p'-DDT), 1,1-dichloro-2,2-bis(p-chlorophenyl) ethylene (p,p'-DDE), and some polychlorinated biphenyls (PCBs) are carcinogenic to animals and possibly also to human beings. (nih.gov)
- A similar pattern was shown for the major di-ortho-chlorinated PCBs (congeners 138, 153, and 180), even after adjustment for p,p'-DDE, but without a specific association with spectrum. (nih.gov)
- Organochlorine compounds such as p,p'-DDT, p,p'-DDE, and some PCBs could play a part in the pathogenesis of exocrine pancreatic cancer through modulation of K-ras activation. (nih.gov)
- 1 , 4 , 5 , 6 , 7 Contaminants such as asbestos, hydrochloric acid, PCBs (Polychlorinated biphenyls), silica and heavy metals were found in the dust and ash resulting from the WTC collapse. (cdc.gov)
- BACKGROUND: Residents of Anniston Alabama were highly exposed to polychlorinated biphenyls (PCBs) due to longstanding manufacturing in the area. (cdc.gov)
Polycyclic aromatic hyd1
- These compounds include the mono-aromatic hydrocarbons (m-xylene, o-xylene, and ethylbenzene) and polycyclic aromatic hydrocarbons (naphthalene, dibenzofuran, and biphenyl). (fulbright-chronicles.com)
Poly-Chlorinated Biphenyls1
- PCB, an abbreviation for Poly-Chlorinated Biphenyls, encompasses a group of 209 distinct chemical compounds. (sflorg.com)
Carcinogenic1
- Many of the samples were also loaded with polychlorinated biphenyls, highly carcinogenic chemical compounds that were common before their international ban in 2001. (blacksciencefictionsociety.com)
Organic10
- Elevated concentrations of carbon-dioxide (124389) and volatile organic compounds were found. (cdc.gov)
- The presence of polar and especially hydrogen-bonding groups on organic compounds generally leads to higher melting points. (wiewird.com)
- Some organic compounds are resistant to environmental degradation and can accumulate in organisms, causing harmful effects. (frontiersin.org)
- VARCLUS procedure was used to create hierarchical clusters between PFAS and other legacy persistent organic pollutants which may share similar exposure routes. (cdc.gov)
- Persistent organic pollutants ( POPs ) are organic compounds that are resistant to degradation through chemical , biological , and photolytic processes. (wikipedia.org)
- POPs typically are halogenated organic compounds (see lists below) and as such exhibit high lipid solubility . (wikipedia.org)
- The stability and lipophilicity of organic compounds often correlates with their halogen content, thus polyhalogenated organic compounds are of particular concern. (wikipedia.org)
- [3] Compounds that make up POPs are also classed as PBTs (persistent, bioaccumulative and toxic) or TOMPs (toxic organic micro pollutants). (wikipedia.org)
- Even worse is "the less volatile organic compounds, such as polybrominated diphenyl ethers and brominated HNPs, were detected at similar levels" in all 3 oils, which used a commercial molecular distillation treatment. (itestosterone.com)
- A wide range of halogenated organic compounds were used as solvents, agricultural chemicals, and insulating liquids. (ispub.com)
Organohalogen compounds1
- No difference in contaminant levels was observed between fish with abnormal gonads and fish with normal gonads, suggesting no causal link between the investigated lipophilic organohalogen compounds present in fish and the observed gonad abnormalities in whitefish from Lake Thun. (unibe.ch)
Organochlorine compounds3
- Either serum or adipose OCP/PCB levels of a variety of environmental organochlorine compounds may serve as useful biomarkers of body burden. (aacrjournals.org)
- Serum concentrations of organochlorine compounds and K-ras mutations in exocrine pancreatic cancer. (nih.gov)
- We analysed the relation between serum concentrations of selected organochlorine compounds and mutations in codon 12 of the K-ras gene in patients with exocrine pancreatic cancer. (nih.gov)
Aromatic compounds1
- The flat shape of aromatic compounds such as napthalene and biphenyl allows them to stack together efficiently, and thus aromatics tend to have higher melting points compared to alkanes or alkenes with similar molecular weights. (wiewird.com)
Concentrations5
- Analysis of blood samples from some employees showed chlordane metabolite concentrations similar to those of the general population. (cdc.gov)
- The target substances were identified in all samples and concentrations of the analyzed compounds were highly correlated among each other. (unibe.ch)
- Follow-up activities were not deemed necessary given that no elevated concentrations were found and the levels were similar to those detected in domestic raw milk monitoring data. (canada.ca)
- Stark and his colleagues found high concentrations of hydrocarbons - compounds found in fuels - and heavy metals, such as lead, copper, and zinc. (blacksciencefictionsociety.com)
- All compounds showed higher concentrations in serum and lowest concentrations in seminal plasma. (springer.com)
Tetra3
- Atropisomerism was first experimentally detected in a tetra substituted biphenyl, a diacid, by George Christie and James Kenner in 1922. (wikipedia.org)
- The symmetrical tetra ([1,1′-biphenyl]-4-yl) phosphonium cations in both compounds self-assembled to form robust stacked columns in the solid-state, with voids occupied by anions or solvent molecules. (edu.au)
- The present work can not only benefit in understanding the mutual interaction between the sterically encumbered tetra ([1,1′-biphenyl]-4-yl) phosphonium cations and between counterions, but also provide insights for the self-assembled arrays in the solid-state. (edu.au)
Pollutants3
- Gas chromatography with quadrupole time-of-flight mass spectrometry (GC-QTOF-MS) is a highly versatile tool capable of doing routine chemical quantification of regulated compounds while also performing non-targeted identification of emerging pollutants in environmental samples. (agilrom.ro)
- In addition to targeted quantification of regulated compounds, non-targeted analysis of a large number of environmental pollutants is gaining traction and an area where GC-QTOF-MS excels. (agilrom.ro)
- Six more years marched slowly by, as pitched battles behind the scenes continued, sapping the IRIS program's energy to assess other common and deadly pollutants and compounding the enormous payoff for the chemical and paper industries. (progressivereform.net)
Degradation2
- Halogenated compounds also exhibit great stability reflecting the nonreactivity of C-Cl bonds toward hydrolysis and photolytic degradation . (wikipedia.org)
- In addition, analysis on culture dependent and culture independent bacteria were done, which might play a vital role in the degradation of the non-degradable compounds. (ispub.com)
Flame-retardants2
- There are many challenges associated with the chemistry, toxicology and environmental analysis of brominated flame retardants (BFRs) as well as other chlorinated and nonhalogenated compounds used solely as flame retardants (FRs), or in mixtures with BFRs. (environmental-expert.com)
- In addition, we offer a BFR calibration set as well as many individual standards of other flame retardants and compounds related to BFRs that are created through metabolism, combustion, or other processes. (environmental-expert.com)
Contaminants1
- Broad scope targeted screening is based on an extensive accurate mass library of environmental contaminants, while an untargeted approach includes unit mass libraries search and takes advantage of a variety of tools and techniques for compound identification and confirmation. (agilrom.ro)
Pathways2
- Perillyl alcohol, a modulator of small G-protein activity, and biphenyl compounds, activators of Fas-mediated death pathways, suppress B16 growth. (iiarjournals.org)
- The mechanistic data for all types of can be used to identify and organize fects (e.g. is able to induce genotox- ionizing radiation ( IARC, 2012f) are mechanistic information related to icity or affect similar pathways), but particularly informative with regard to cancer induction. (who.int)
Abstract1
- Moreover, absent pharmacodynamic differences identifiable physiological entities but rather are abstract between animal species, it is expected that similar responses concepts with meaning only in terms of a particular calcu- will be produced at equivalent tissue exposures regardless lation. (cdc.gov)
Toxic2
- As one possible trigger for these effects, the presence of persistent, bioaccumulative and toxic compounds acting as endocrine disruptors in the lake has been discussed. (unibe.ch)
- instead it occasionally leads to the formation of metabolic products that are more toxic or persistent than the parent compound 4 . (nature.com)
Chemical2
- NOTE: In many cases the modern drawings of chemical formulas may erroneously suggest a compound to be of different (i.e. wrong) symmetry than it really is. (tu-darmstadt.de)
- They exert their negative effects on the environment through two processes, long range transport, which allows them to travel far from their source, and bioaccumulation, which reconcentrates these chemical compounds to potentially dangerous levels. (wikipedia.org)
Ortho2
- The most important class of atropisomers are biaryls such as diphenic acid, which is a derivative of biphenyl with a complete set of ortho substituents. (wikipedia.org)
- Hecht and co-workers investigated the effect of the electronic coupling in detail and showed that the incorporation of ortho -methyl groups on the biphenyl restores the photoisomerization properties ( Figure 1 ) [18,19] . (beilstein-journals.org)
Chemicals1
- He has extensive experience in occupational exposure limit derivation methods and has developed OELs or similar limits for several hundred individual chemicals. (aiha.org)
Liquids1
- Ionic compounds, as expected, usually have very high melting points due to the strength of ion-ion interactions (there are some ionic compounds, however, that are liquids at room temperature). (wiewird.com)
Substances1
- These correlations show that the analyzed substances have the same distribution pattern throughout the lake and that uptake, accumulation and elimination processes are similar. (unibe.ch)
Congeners1
- The relative concentration patterns of the 14 PCB congeners were similar to those reported in other human studies and were also typical of patterns reported in environmental samples from various biota, including mammals and birds, but differed substantially from patterns reported in occupationally exposed workers. (aacrjournals.org)
Occurs1
- Heteroaromatic analogues of the biphenyl compounds also exist, where hindered rotation occurs about a carbon-nitrogen or a nitrogen-nitrogen bond. (wikipedia.org)
Environmental1
- Environmental factors also influence to degrade the compound which includes pH, temperature, bioactivity, nutrient supply and oxygen availability. (ispub.com)
Synthetic2
- The investigation of multi-photochromic compounds constitutes a great challenge, not only from a synthetic point of view, but also with respect to the analysis of the photochemical properties. (beilstein-journals.org)
- These are synthetic compounds viz. (ispub.com)
Exhibit1
- Since all compounds exhibit some level of London dispersion forces and compounds capable of H-bonding also exhibit dipole-dipole, we will use the phrase "dominant IMF" to communicate the IMF most responsible for the physical properties of the compound. (wiewird.com)
Increases1
- When comparing compounds with the same IMFs, we use size and shape as tie breakers since the London dispersion forces increase as the surface area increases. (wiewird.com)
Structures2
- Compounds possessing mirror symmetry are always optically inactive, such as, for example, cis - and trans -1,4-disubstituted cyclohexane derivatives, or symmetrically cis -1,2-disubstituted cyclohexanes (see also the 3D structures at 'Cycloalkanes' ). (tu-darmstadt.de)
- the overall self-assembly for both structures is very similar, with subtle differences in the cell parameters. (edu.au)
Found4
- When the researchers compared some of the samples with data from the World Harbor Project - an international collaboration that tracks large urban waterways - they found that lead, copper, and zinc levels in some cases were similar to those seen in parts of Sydney Harbour and Rio de Janeiro over the past two decades. (blacksciencefictionsociety.com)
- 3 Similar findings were found for the forced vital capacity (FVC). (cdc.gov)
- This area of research is continuing to grow as additional FRs are being found in the environment and certain BFRs are being phased out and replaced with new compounds. (environmental-expert.com)
- Most of the plastics were fragments (86.0%), but 7.3% were beads, some of which were microbeads, similar to those found in facial cleansers. (researchgate.net)
Responses1
- Our previous studies have shown that farnesyl-O-acetylhydroquinone has a markedly greater growth-suppressive activity than that predicted by the responses to the parent compounds. (iiarjournals.org)
Group1
- Chromatography Technical Note No AS167Investigation of the Agilent 5977B with High Efficiency Source (HES) toEnable Electron Impact (EI) Analysis of Phenolic Compounds in WaterRichard Davis, Anatune Ltd. Girton, Cambridgeshire (UK)Paul Leather, Environment Agency, Exeter (UK)IntroductionInstrumentationPhenolic compounds are a group of. (labrulez.com)
High2
- High resolution GC-QTOF-MS allows full spectrum acquisition with excellent mass accuracy and resolving power, and is ideal for analytes in complex matrices with coeluting compounds, resulting in the reduction of false positives. (agilrom.ro)
- Bioaccumulation of POPs is typically associated with the compounds high lipid solubility and ability to accumulate in the fatty tissues of living organisms for long periods of time. (wikipedia.org)
Biological1
- In a related example by Samanta and Woolley a similar compound was presented featuring anchoring groups for biological applications ( Figure 1 ) [20] . (beilstein-journals.org)
Publication1
- This graph shows the total number of publications written about "Biphenyl Compounds" by people in Harvard Catalyst Profiles by year, and whether "Biphenyl Compounds" was a major or minor topic of these publication. (harvard.edu)
Present1
- In a similar way, aliphatic ring systems like cyclohexanes linked through a single bond may display atropisomerism provided that bulky substituents are present. (wikipedia.org)
Properties1
- Some of these may have properties similar to the existing PFAs, and some may be less persistent in the environment. (alkaway.com.au)
Accumulation1
- Furthermore, in 2022, a similar announcement was made regarding the accumulation of black carbon, which consists of particles primarily generated from the combustion of fossil fuels. (sflorg.com)
Light1
- The fluorescent lighting system contained polychlorinated-biphenyl filled light ballasts. (cdc.gov)
Share similar1
- We share similar research interests in the field of biodegradation of harmful compounds, and I feel so lucky to have been hosted by him. (fulbright-chronicles.com)