5-aminolevulinic acid-mediated photodynamic therapy on cervical condylomata acuminata.

Objective: The aim of this study was to evaluate the efficacy of 5-aminolevulinic acid-mediated photodynamic therapy (PDT) on cervical condylomata accuminate (CA) and to determine the ultrastructural changes of the lesion after treatment.

Background Data: Although there are many methods to treat cervical CA, a high recurrence rate and cervical scars are troublesome problems.

Materials And Methods: Forty-eight patients with cervical CA were treated with topical 20% ALA gel followed by PDT through a cylindrical fiber with a wavelength of 630 nm of laser light.

[Spectroscopy characteristics of various aluminum phosphates in Al2O3-P2O5-H2O system and its high temperature products].

Various aluminum phosphates were prepared with phosphoric acid and aluminum hydroxide under different conditions. IR, XRD, Raman and SEM were used to study the structure difference and their change in heating process and particle morphology of obtained products and aluminum tripolyphosphate. The results show that the spectral characteristic change of phosphate from H2PO4-, PO4(3-), H2P3O10(3-) and PO3- can be seen when P/Al molar ratio = 3 or the condensation temperature is different.

[Spectral properties and thermal stability of zinc phosphate hydrate].

X-ray, FTIR, and Raman spectra were used to measure the spectral properties of three kinds of zinc phosphate hydrate. Spectral changes with crystalline water were analyzed. The thermal stability of zinc phosphate tetrahydrate was studied by TG-DTA to identify the existent temperature of zinc phosphate hydrate.