Alternative treatment paradigm for thalassemia using iron chelators
- 作者：Natasha Szuber ; Joan L. Buss ; Shan Soe-Lin ; Hady Felfly ; Marie Trudel ; Prem Ponka
- 关键词：Light scattering ; Black carbon ; Composite particles ; Discrete dipole approximation ; Effective medium theory
- 刊名：Experimental Hematology
- 出版年：2008
- 期刊代码：100_0301472x
- 类别：med
- 出版时间：July 2008
- 卷：36
- 期：7
- 页码：773-785
- 文件大小：4227 K
摘要
Atmospheric particles may contain a small amount of black carbon (BC) that may affect their optical properties. These optical properties also depend strongly on the particle morphology and internal topology. The efficiency factors for scattering Qsca, absorption Qabs, extinction Qext, backscattering Qbk, as well as the asymmetry parameter 
cos
, linear polarization P, and scattering phase functions S11 are analyzed in detail as functions of morphology and internal topology. Backscattering quantities (like Qbk and P and S11 at large scattering angles) are affected most significantly. The behavior of these quantities depends strongly on the internal mixing of the constituent materials making up the particle. Effective medium theories (EMTs), which assume that the particle is homogeneous and are applied frequently in radiative transfer studies, can underestimate Qsca and S11 especially when high carbon contents are considered. Contrarily, EMTs also tend to overestimate the values of the asymmetry parameter and Qabs.
cos, linear polarization P, and scattering phase functions S11 are analyzed in detail as functions of morphology and internal topology. Backscattering quantities (like Qbk and P and S11 at large scattering angles) are affected most significantly. The behavior of these quantities depends strongly on the internal mixing of the constituent materials making up the particle. Effective medium theories (EMTs), which assume that the particle is homogeneous and are applied frequently in radiative transfer studies, can underestimate Qsca and S11 especially when high carbon contents are considered. Contrarily, EMTs also tend to overestimate the values of the asymmetry parameter and Qabs.