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Basic research on determining optical properties of tissues in vivo by measuring diffuse reflectance with a charge-coupled device

Sun P., Cao X., Yang R., Xie F., Ding J., Zhang F.

Optica Applicata

2011

Vol. 41, nr 3

541--555

We measured the absorption coefficient and the reduced scattering coefficient of Intralipid solution and human forearm tissues in vivo by measuring diffuse reflectance with a charge-coupled device, examining the techniques involved. The experimental results indicate that the error is less than or equal to 8% using the diffusion theory, under the condition that the reduced scattering coefficient is one order of magnitude greater than the absorption coefficient. The stability and precision of optical property measurements are significantly improved by using the multistep iterative fitting method and using the ring-zone-constraint method to determine the diffuse reflectance center. The efficiency of reverse algorithm is greatly enhanced by selecting a one-dimensional array on the straight line crossing both the entry point and the diffusion center for fitting.

Synthesis, structure and Magnetic Property of a New Neodymium-Adipate Coordination Polymer with Large Guest Molecules

Duan L., Ye L., Liu Y., Xie F., Yu J., Xu J.

Polish Journal of Chemistry

2005

Vol. 79 / nr 12

1835-1842

A new lanthanide-adipate coordination polymer, Nd2(ad)3(H2O)4](H2ad)_4H2O}n (1) (H2ad = adipic acid), has been hydrothermally synthesized and structurally characterized by X-ray single crystal structure analysis, elemental analysis, infrared spectrum, thermogravimetric analysis and temperature-dependent magnetic susceptibility. The three-dimensional structure of compound 1 is based on edge-sharing NdO8(H2O)2 polyhedron chains, which were interconnected by twisted or extended carbon chains of the adipate ligands in [010] and [001] directions, respectively. The network contains large channels with adipic acid and lattice water acting as guest molecules. Above 50 K, the magnetic susceptibility data of 1 can be fitted to the Curie-Weiss law with teta = - 41.0 K and c = 3.52 emu Kmol-1.