Hyperplastic granuloma-like lesions in three cases with partial thickness burn wounds.
Hyperplastic granuloma-like lesions in three cases with partial thickness burn wounds Hong-Liang Zhao *, Lian-Gui Li , Lian-kui Zhao , Tai-Ping Hu b a Burns and Plastic Department, Staff Hospital of Han Dan Iron and Steel Group, 17, Qian Jin street, Fu xing District, Han Dan, He Bei 056003, People’s Republic of China b Burns and Plastic Department, Staff Hospital of ShiJiaZhuang Iron & Steel Group, People’s Republic of China
Treatment of Pyogenic Granuloma with a Sclerosing Agent
BACKGROUND Pyogenic granulomas have been treated by cryosurgery, curettage, electrodesiccation, chemical cauterization, and laser surgery. The therapeutic effects of these conservative treatments are limited, however. OBJECTIVE In this study, the efficacy of a sclerosing agent (monoethanolamine oleate) was evaluated for the treatment of pyogenic granuloma. METHODS Pyogenic granuloma was treated by local injection of the monoethanolamine oleate solution in nine patients who were from 1 to 57 years of age (median 18 years). The treatment effect was determined by physical examination. RESULTS All lesions were removed completely with no recurrence, and scars were inconspicuous in all cases. Complications occurred in only one patient who complained of pain due to an avoidable injection of excess solution. CONCLUSION Sclerotherapy with monoethanolamine oleate is effective in the treatment of pyogenic granuloma and offers an alternative to conventional methods in cases for which conservative treatment is preferable.
Effects of the mineral phase and valence of vanadium on vanadium extraction from stone coal
The influence of roasting on the leaching rate and valence of vanadium was evaluated during vanadium extraction from stone coal. Vanadium in stone coal is hard to be leached and the leaching rate is less than 10% when the raw ore is leached by 4 mol/L H2SO4 at 90°C for 2 h. After the sample is roasted at 900°C for 2 h, the leaching rate of vanadium reaches the maximum, and more than 70% of vanadium can be leached. The crystal of vanadium-bearing mica minerals decomposes and the content of V(V) increases with the rise of roasting temperature from 600 to 900°C, therefore the leaching rate of vanadium increases significantly with the decomposition of the mica minerals. Some new phases, anorthite for example, form when the roasting temperature reaches 1000°C. A part of vanadium may be enwrapped in the sintered materials and newly formed phases, which may impede the oxidation of low valent vanadium and make the leaching rate of vanadium drop dramatically. The leaching rate of vanadium is not only determined by the valence state of vanadium but also controlled by the decomposition of vanadium-bearing minerals and the existence state of vanadium to a large extent.