A one-step route was developed for sulfate functionalization of titania foam, consisting of integrating the sol-gel process with an emulsion template. The resulting material was used to evaluate the relevance of the porous structure and surface sulfate groups in the photocatalytic degradation of Rhodamine B molecules in water under UV irradiation. X-ray diffraction (XRD) analysis showed that the anatase crystalline phase was metastabilized by functionalization of the surface with sulfate species, which caused the crystallite size to decrease from 21 to 10 nm, while the specific surface area increased from 4 to 42 cm2 g−1. Small-angle X-ray scattering (SAXS) measurements during heating of the non-sulfated (E-TiO2) and sulfated (E-TiO2/SO42−) sols emulsified with sodium dodecyl sulfate (SDS) as surfactant and isopropyl myristate as the nonpolar phase, revealed formation of the liquid crystalline structure. Elimination of this mesophase template allowed the preparation of ceramic foams with hierarchical structure formed by meso- and macropore families. The kinetics of photodegradation reaction of Rhodamine B followed a pseudo-first order mechanism. The most efficient photocatalytic activity (higher rate constant and shorter half-life time) was obtained for the foam templated using 20% of SDS (E-TiO2/SO42− 20SDS), which exhibited the highest values for porosity (93%) and specific surface area (80 m3 g−1). onestep one step solgel sol gel irradiation Xray X ray XRD (XRD species 2 1 nm cm g1 g g−1 Smallangle Small angle SAXS (SAXS nonsulfated non ETiO2 ETiO E TiO2 TiO (E-TiO2 ETiO2/SO42− ETiO2SO42 ETiOSO TiO2/SO42− SO42 SO (SDS meso families pseudofirst pseudo first mechanism higher halflife half life time 20 (E-TiO2/SO42 20SDS, 20SDS , 20SDS) 93% 93 (93% 80 (8 m . g−1) g− (E-TiO ETiO2/SO42 ETiO2SO4 TiO2SO42 TiOSO TiO2/SO42 SO4 (E-TiO2/SO4 9 (93 8 ( ETiO2/SO4 ETiO2SO TiO2SO4 TiO2/SO4 (E-TiO2/SO (9 ETiO2/SO TiO2SO TiO2/SO

RESUMO O comportamento biológico dos tumores varia de acordo com a espécie animal, a localização na cavidade, a fase clínica e a natureza histopatológica. As neoplasias orais são geralmente incomuns em animais de companhia. Os rabdomiossarcomas são formações malignas, sólidas e agressivas, com alto potencial metastático. Os sinais clínicos são variáveis e o diagnóstico definitivo só pode ser alcançado por meio da análise histopatológica do material colhido. Em alguns casos, o estudo imuno-histoquímico pode ser necessário para confirmar o diagnóstico. Este trabalho tem como objetivo destacar pontos importantes sobre essa condição incomum em cães, utilizando um relato de caso de rabdomiossarcoma lingual, no qual não se evidenciaram metástases após o diagnóstico, nem recorrência local após a excisão cirúrgica com ampla margem de segurança. Concluiu-se que o diagnóstico precoce, a correta interpretação dos exames complementares e a abordagem terapêutica adequada contribuíram para melhorar a qualidade de vida e a sobrevida do paciente em questão.

ABSTRACT The biological behaviour of the tumours vary according to the species in which they occur, its location within the cavity, clinical stage and histopathological nature. Lingual neoplasms are generally uncommon in companion animals. Rhabdomyosarcomas are malignant, solid, aggressive formations with high metastatic potential. The clinical signs are variable and a definitive diagnosis can only be reached through histopathological analysis of biopsy and necropsy specimen. In some cases, immunohistochemical study may be needed to confirm the diagnosis. This paper aims to highlight important points about this uncommon condition in dogs, using a case report of lingual rhabdomyosarcoma, which showed no evidence of metastasis after diagnosis, nor of local recurrence after surgical excision with a wide safety margin. It was concluded that early diagnosis, the correct interpretation of the complementary tests and the appropriate therapeutic approach contributed to improving the quality of life and survival of the patient in question.