Peng Xi | PubMed Health

PubMed2003

Multifunctional double-layered diffractive optical element.

We propose a novel multifunctional double-layered diffractive optical element (DOE) based on the fractional Talbot effect. This DOE consists of two layers: one is the encoding layer, in which multiple sub-DOEs, i.e., multiple optical functions, are encoded; the other is the decoding layer, which is a properly designed Talbot illuminator. This DOE can perform each of the multiple optical functions one by one by shifting the encoding layer. Experimental results demonstrate that this method is efficient. This device should be highly interesting for integrated optics, optical interconnection, secure optical storage, and dynamic optical fiber communications.

Journal Article↗

PubMed2003

Pathology of the thymus, spleen and bursa of Fabricius in zinc-deficient ducklings.

The weight and growth index of bursa of Fabricius, thymus and spleen were significantly reduced (P<0.05 or P<0.01) in zinc (Zn)-deficient ducks (Zn 22.9 mg/kg diet) when compared with normal ducks. The G(0)/G(1) phase of the cell cycle of the bursa of Fabricius, thymus and spleen was much higher, and the S and G(2)+M phases lower in Zn-deficient ducks than in the controls. Histopathologically, there was lymphocyte degeneration and depletion of lymphoid organs, and the reticular cells of thymus were also degenerate or necrotic in the Zn-deficient group. The results demonstrated that Zn deficiency seriously inhibited the growth of lymphoid organs and caused marked pathology in the lymphoid organs. The results also showed that the effect of Zn deficiency on the primary lymphoid organs occurred earlier than on the secondary lymphoid organs. The effect of Zn deficiency was greatest on the bursa of Fabricius, followed by the thymus, and then the spleen.

Animals↗