Results 41 to 50 of about 28,914 (230)
Molecules, 2020 All the possible polychlorinated aromatic compounds in the classes of dibenzodioxins (PCDDs), dibenzofurans (PCDFs), and biphenyls (PCBs) were studied by the quantum chemical methods of HF/6-311++G(d,p), B3LYP/6-311++G(d,p), and MP2/cc-pVTZ.
Sopanant Datta, Taweetham Limpanuparb
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Environmental contamination of free-range hen with dioxin
Journal of Veterinary Research, 2021 The transfer of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) from a contaminated environment into the food chain is a serious consumer safety problem.
Mikołajczyk Szczepan +3 more
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Mass Spectrometry Reviews, EarlyView.ABSTRACT The review examines the evolution of chemical ionization mass spectrometry (CI‐MS), a technique developed in 1966 by Field and Munson. CI is a soft‐ionization method that produces more intense molecular ions with less fragmentation than electron ionization (EI).
Malvika Dutt +4 more
wiley +1 more source
Environmental Toxicology, EarlyView.ABSTRACT Freshwater turtles are valuable sentinels of aquatic systems due to their long lifespans and resilience in environments impacted by contaminants. The Permian Basin, dominated by the oil and gas sector, spans western Texas and southeastern New Mexico, USA, including the Pecos River and its tributaries, the Delaware and Black Rivers.
Ana G. G. Sapp +4 more
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Kinetics of Biphenyl and Polychlorinated Biphenyl Metabolism in Soil [PDF]
Applied and Environmental Microbiology, 1985 The metabolism of 14 C-labeled PCBs (polychlorinated biphenyls), which comprised the Aroclor 1242 mixture, was greatly enhanced by the addition of biphenyl (BP) to soil. After 49 days, only 25 to 35% of the original PCBs remained in the soil, and 48 to 49% was converted to 14 CO 2
D D, Focht, W, Brunner
openaire +2 more sources
Stable organic contaminants. Problems and ways of solving thems
Тонкие химические технологии, 2011 The article provides the results of polychlorinated biphenyls and pesticides inventory in the Russian Federation and data about releases of dioxins estimated on the basis of various sources. The article contains brief information on some new technologies
Yu. A. Treger
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AVALIAÇÃO DOS RESÍDUOS GERADOS DURANTE A DESTRUIÇÃO DE PCBS PELO PROCESSO CATALISADO POR BASE
Química NovaThere are many processes capable of decontamination of polychlorinated biphenyls in several matrixes. The set of inputs, materials, operation conditions and efficiencies are wide.
Cassio P. Menini +6 more
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Toxics, 2022 The concentrations, possible sources, and ecological risk of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were studied by analyzing water column (DP), suspended particulate matter (SPM) and sediment samples from 10 sites on the ...
Elvira De Rosa +4 more
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A practical approach to the degradation of polychlorinated biphenyls in transformer oil
, 2005 A practical and efficient disposal method for hydrodechlormation of polychlorinated biphenyls (PCBs) in transformer oil is reported. Transformer oil containing PCBs was treated by nanometric sodium hydride (nano-NaH) and transition metal catalysts.
Xu, J +5 more
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Steep declines of colonial wading birds in northeastern North America's largest breeding population
Conservation Science and Practice, EarlyView.This study analyzed 22 years of complete nest census data for colonial wading birds in New York–New Jersey Harbor, the largest breeding population in the northeastern United States. Over this period, the total wading bird population decreased by 27%, a rate exceeding average long‐term declines across North American birds.
Dustin Partridge +8 more
wiley +1 more source