Exposure Modelling

Meent, Dik van de; Bruijn, Jack H. M. de; Leeuw, Frans L.; Nijs, A. C. M. De; Jager, D. T.; Vermeire, Theo

doi:10.1007/978-94-015-8520-0_4

Cited by 24 publications

(38 citation statements)

References 39 publications

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“…These processes can be described by a bioconcentration (BCF-uptake via medium) or bioaccumulation factor (BAF-if uptake via the food chain is involved) (Trapp and McFarlane, 1995;Van de Meent et al, 1995). However, the contaminant concentration is generally lower in the organism or crops than in soil to which a contaminant was applied via sludge (see e.g., ICON, 2001;Kirchmann and Tengsved, 1991;Smith, 1996).…”

Section: Exposure Pathways and Transfer Processes For Organic Chemicalsmentioning

confidence: 97%

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A risk-based methodology for deriving quality standards for organic contaminants in sewage sludge for use in agriculture—Conceptual Framework

Schowanek

Carr

David

et al. 2004

Regulatory Toxicology and Pharmacology

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Section: Exposure Pathways and Transfer Processes For Organic Chemicalsmentioning

confidence: 97%

“…The modelling of indirect human exposure to environmental contaminants in food is described, together with some examples, in Van de Meent et al (1995). This approach has been implemented in EU chemical risk assessment procedures (TGD) and in the software EUSES (CEC, 1996(CEC, , 2003.…”

Section: Indirect Human Exposurementioning

confidence: 99%

A risk-based methodology for deriving quality standards for organic contaminants in sewage sludge for use in agriculture—Conceptual Framework

Schowanek

Carr

David

et al. 2004

Regulatory Toxicology and Pharmacology

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“…(29) and (30); the quantities ∆E and −∆L are then just the integrals with respect to r p , taken from r p = 4M to r p = ∞. We write each integral as a sum of three contributions, in the form ∆E = ∆E whirl + ∆E num + ∆E tail (84) (and similarly for ∆L), corresponding to rmin 4M , rmax rmin and ∞ rmax , respectively. The main contributions, ∆E num and ∆L num , are obtained via numerical integration of our data.…”

Section: Monopole and Dipole Modesmentioning

confidence: 99%

“…The values δz(1/4) and δz (1/4) are [like a(1/4) and a (1/4)] gauge invariant (within a class of manifestly helically symmetric and asymptotically flat gauges), and can be obtained numerically with great accuracy using standard frequency-domain circular-orbit self-force codes. These values may be extracted from the Lorenzgauge numerical results presented in [61], but we quote here more recent, highly accurate values made available to us by M. van de Meent [84], which were produced using the semi-analytical, radiation-gauge method of Ref. [85]:…”

Section: Ibco Frequency and Angular Momentum Directly From The Fimentioning

confidence: 99%

Self-force effects on the marginally bound zoom-whirl orbit in Schwarzschild spacetime

et al. 2019

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For a Schwarzchild black hole of mass M , we consider a test particle falling from rest at infinity and becoming trapped, at late time, on the unstable circular orbit of radius r = 4GM/c 2 . When the particle is endowed with a small mass, µ M , it experiences an effective gravitational self-force, whose conservative piece shifts the critical value of the angular momentum and the frequency of the asymptotic circular orbit away from their geodesic values. By directly integrating the self-force along the orbit (ignoring radiative dissipation), we numerically calculate these shifts to O(µ/M ).Our numerical values are found to be in agreement with estimates first made within the Effective One Body formalism, and with predictions of the first law of black-hole-binary mechanics (as applied to the asymptotic circular orbit). Our calculation is based on a time-domain integration of the Lorenz-gauge perturbation equations, and it is a first such calculation for an unbound orbit. We tackle several technical difficulties specific to unbound orbits, illustrating how these may be handled in more general cases of unbound motion. Our method paves the way to calculations of the self-force along hyperbolic-type scattering orbits. Such orbits can probe the two-body potential down to the "light ring", and could thus supply strong-field calibration data for eccentricity-dependent terms in the Effective One Body model of merging binaries.

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“…Elements from the soil pass along the food chain via plants and animals and also enter the water supply. They can occur in concentrations that are either toxic or de"cient, both leading to ill health (Oliver, 1997;van de Meent et al, 1995). Figure 1 illustrates the common human exposure routes.…”

Section: Factors Affecting Toxicitymentioning

confidence: 99%