• dioxins
  • It was announced that "dioxins & dioxin like PCBs", a group of highly toxic synthetic halogenated organic compounds, had been discovered in pork at levels between 80 and 200 times the EU's recommended safety limits. (wikipedia.org)
  • Polychlorinated dibenzo-p-dioxins Polychlorinated dibenzofurans Polychlorinated biphenyls 1,4-dioxin Because dioxins refer to such a broad class of compounds that vary widely in toxicity, the concept of toxic equivalency factor (TEF) has been developed to facilitate risk assessment and regulatory control. (wikipedia.org)
  • In reference to their importance as environmental toxicants the term dioxins is used almost exclusively to refer to the sum of compounds (as TEQ) from the above groups which demonstrate the same specific toxic mode of action associated with TCDD. (wikipedia.org)
  • Occupational and Environmental Medicine 2002;59:362-368 Associations of diet with body burden of dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (PCBs): observations on pregnant women from central Taiwan. (wikipedia.org)
  • aqueous
  • Halogenated hydrocarbons, such as 1,1,1-trichloro-2, 2-bis(chlorophenyl) ethane (DDT) and polychlorinated biphenyls (PCB), are removed from aqueous media including waste water from chemical manufacturing operations by contacting the aqueous media with an effective amount of a polyolefinic microporous. (google.es)
  • Halogenated hydrocarbons, such as 1,1,1-trichloro-2, 2-bis(chlorophenyl) ethane (DDT) and polychlorinated biphenyls (PCB), are removed from aqueous media including waste water from chemical manufacturing operations by contacting the aqueous media with an effective amount of a polyolefinic microporous adsorbent, preferably in the form of a filter or cartridge. (google.es)
  • toxic
  • TCDD binding to the AH receptor induces the cytochrome P450 1A class of enzymes which function to break down toxic compounds, e.g., carcinogenic polycyclic hydrocarbons such as benzo(a)pyrene (but making many of them more toxic in the process). (wikipedia.org)
  • Polychlorinated dibenzofurans are much more toxic than the parent compounds, with properties and chemical structures similar to polychlorinated dibenzodioxins. (wikipedia.org)
  • reaction
  • however, with the use of ultrasound the reaction can also be made useful for the production of biphenyl compounds. (wikipedia.org)
  • The compound is quite stable and readily forms dimers and cyclic trimeric anhydrides, which complicate purification and tend to protodeboronize, a secondary reaction that occurs frequently in the Suzuki coupling, with elimination of the boronic acid function. (wikipedia.org)
  • aryl
  • Both palladium and copper complexes of the compound exhibit high activity for the coupling of aryl halides and aryl tosylates with various amides. (wikipedia.org)
  • widely
  • Polychlorinated biphenyls were once widely deployed as dielectric and coolant fluids in electrical apparatus, carbonless copy paper and in heat transfer fluids. (wikipedia.org)
  • chemical
  • Adverse sequelae of the chemical revolution have recently been recognized, with several studies confirming that many chemical compounds have accumulated and persist within the environment and within people [ 1 , 2 ], with attendant health sequelae in many cases [ 3 , 4 ]. (hindawi.com)
  • Although there are millions of chemical compounds available around the globe [ 7 ], only a fraction of these are regulated under specific legislation in key markets [ 8 ]. (hindawi.com)
  • S. paucimobilis is able to degrade lignin-related biphenyl chemical compounds. (wikipedia.org)
  • Endocrine disrupting compounds encompass a variety of chemical classes, including drugs, pesticides, compounds used in the plastics industry and in consumer products, industrial by-products and pollutants, and even some naturally produced botanical chemicals. (wikipedia.org)
  • acid
  • When the aryllithium compound of 1-bromo-4-(diethoxymethyl)benzene is used with triisopropylborate at -78 °C instead of the Grignard compound (via n-butyllithium) 4-formylphenylboronic acid is obtained in 99% crude yield. (wikipedia.org)
  • properties
  • Perfluorinated compounds (PFCs) are man-made organofluorine chemicals manufactured and marketed for their stain-resistant properties. (hindawi.com)
  • The term endocrine disruptor is often used as synonym for xenohormone although the latter can mean any naturally occurring or artificially produced compound showing hormone-like properties (usually binding to certain hormonal receptors). (wikipedia.org)
  • derivatives
  • 2. Biphenyl and its 4-hydroxy and 4,4′-dihydroxy derivatives are extensively excreted in the bile as glucuronides in amounts increasing in order of molecular weight. (biochemj.org)
  • useful
  • Muscarinic receptor antagonists are known to provide bronchoprotective effects and therefore, such compounds are useful for treating respiratory disorders, such as COPD and asthma. (google.com)
  • Provided are compounds useful for treating cancer and methods of treating cancer comprising administering to a subject in need thereof a compound described herein. (patents.com)
  • methods
  • In response, research is currently underway to determine methods to eliminate persistent compounds from the body in order to preclude and overcome health problems [ 5 , 6 ]. (hindawi.com)
  • Also described herein are methods of using the compounds that. (patents.com)
  • active
  • They are sometimes also referred to as hormonally active agents, endocrine disrupting chemicals, or endocrine disrupting compounds. (wikipedia.org)
  • similar
  • It is suggested that the mechanism of the biliary excretion of foreign compounds may be similar to that of conjugated bile acids, which are highly polar and whose molecular weights exceed 400. (biochemj.org)
  • The column converts benzyl chloride to bibenzyl in a Wurtz coupling and in a similar fashion dibenzothiophene is reduced to biphenyl. (wikipedia.org)
  • formation
  • Georg Wittig and coworkers proposed that the formation of biphenyl via reactions of fluorobenzene and phenyllithium proceeded via a zwitterionic intermediate. (wikipedia.org)
  • The formation of the Grignard compound with magnesium requires 1,2-dibromoethane and activation with ultrasound. (wikipedia.org)
  • known
  • Said compounds are pleochroic dyes having a special function which differs from hitherto known dyes in their interaction with nematic liquid crystal molecules. (google.com)