Results 201 to 210 of about 13,531 (222)
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International Biodeterioration & Biodegradation, 2014
Abstract Hydroxypropyl-β-cyclodextrin (HP-β-CD) may be utilised as a selective extractant to assesses the amount of PAHs in contaminated soil that are potentially available for biodegradation (i.e. the bioaccessible fraction). In this study, HP-β-CD extraction and PAH biodegradation (using enhanced natural attenuation) was assessed in 15 PAH ...
Albert L. Juhasz +2 more
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Abstract Hydroxypropyl-β-cyclodextrin (HP-β-CD) may be utilised as a selective extractant to assesses the amount of PAHs in contaminated soil that are potentially available for biodegradation (i.e. the bioaccessible fraction). In this study, HP-β-CD extraction and PAH biodegradation (using enhanced natural attenuation) was assessed in 15 PAH ...
Albert L. Juhasz +2 more
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Environmental Science & Technology, 2005
This paper examines bacterial uptake of polycyclic aromatic hydrocarbons (PAHs) entrained within model polymer release systems (MPRSs) whose release kinetics, particularly for operationally defined "slow" release, are similarto PAH release kinetics from sediments and soils.
Mona, Wells, Lukas Y, Wick, Hauke, Harms
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This paper examines bacterial uptake of polycyclic aromatic hydrocarbons (PAHs) entrained within model polymer release systems (MPRSs) whose release kinetics, particularly for operationally defined "slow" release, are similarto PAH release kinetics from sediments and soils.
Mona, Wells, Lukas Y, Wick, Hauke, Harms
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Bioaccessibility of Mercury in Soils
Soil and Sediment Contamination: An International Journal, 2001The initial risk assessment for the East Fork Poplar Creek (EFPC) floodplain in Oak Ridge, Tennessee, a superfund site heavily contaminated with mercury, was based on a reference dose for mercuric chloride. Mercuric chloride, however, is a soluble mercury compound not expected to be present in the floodplain, which is frequently saturated with water ...
Mark O. Barnett, Ralph R. Turner
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Bioaccessibility of mercury in selected Ayurvedic medicines
Science of The Total Environment, 2013Five Ayurvedic medicines with mercury concentrations of 85mg/kg and higher were characterized with respect to their speciation and their bioaccessibility. X-ray absorption spectroscopy revealed that the mercury in the Ayurvedic medicines was inorganic and best matched to cinnabar, even in samples that had been hypothesized to contain mercury through ...
Iris, Koch +5 more
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Quantification and Bioaccessibility of California Pistachio Bioactives
Journal of Agricultural and Food Chemistry, 2014The content of carotenoids, chlorophylls, phenolics, and tocols in pistachios ( Pistacia vera L.) has not been methodically quantified. The objective of this study was to first optimize extraction protocols for lipophilic nutrients and then quantify the content of two phenolic acids, nine flavonoids, four carotenoids, two chlorophylls, and three tocols
Yuntao, Liu +2 more
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Bioaccessibility of metals in urban playground soils
Journal of Environmental Science and Health, Part A, 2007Children ingest soil. The amount ingested varies with the child's behaviour, and daily ingestion rates have been calculated to be between 39 and 270 mg day(-1). During play, children ingest soil both involuntarily and deliberately, and it can be assumed that the latter may result in ingestion of a larger soil particle size fraction and a larger soil ...
Ljung, K +4 more
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Bioaccessibility of lead in high carbonate soils
Journal of Environmental Science and Health, Part A, 2007Metal bioaccessibility is not currently considered in the French human health risk assessment procedure. For contaminants such as Pb this parameter could have a significant effect on the risk calculation. From the literature, it seems that Pb bioaccessibility is strongly controlled by the occurrence of cerrussite in soils: with a high cerussite content
Denys, Sébastien +3 more
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CHAPTER 9. Metabolic Fate of Bioaccessible and Non-bioaccessible Carotenoids
2018Carotenoid dietary intake and tissue levels in humans have been correlated with reduced incidence of various chronic diseases. However, there is scant knowledge regarding their metabolic fate and the true bioactive constituents. In addition to host factors, including genetic alterations such as single-nucleotide polymorphisms, the bioavailability of ...
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Bioaccessibility of Calcium in Legumes
2015A review is made of the studies on calcium bioaccessibility (BA) (fraction of calcium that is released from its food matrix in the gastrointestinal tract and thus becomes available for intestinal absorption) in legumes and the dietetic factors that condition BA.
Mª Jesús Lagarda +2 more
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Bioaccessibility of Pesticides in Fruits
The bioaccessibility of pesticide residues is a crucial parameter for the prediction of risks to human health and potential exposure to pesticides. Due to various limitations of in vivo studies, in vitro digestion is imposed as a rapid and cost-effective alternative for assessing the bioaccessibility of pesticides in fruits. In this chapter, a protocolMilinčić, Danijel +7 more
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