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The effect of cooling rate in thermally sprayed alumina
André Zimmer 한양대학교 세라믹연구소 2010 Journal of Ceramic Processing Research Vol.11 No.2
Particles deposited with a thermal spray process have a large cooling rate during coating formation. In this study, the effect of different cooling rates on plasma sprayed alumina was investigated. The cooling rate of particles has an important effect on alumina phase formation and crystallite size. Basically the corundum phase was observed when cooling rate is low, but with an increase in the cooling rate, nanocystallites of gamma alumina and amorphous alumina are formed.
Karine Rigon Zimmer,Carlos H. Blum-Silva,André Luiz Kulkamp Souza,Márcia WulffSchuch,Flávio Henrique Reginatto,Cláudio Martin P. Pereira,Alexandre José Macedo,Claiton Leonetti Lencina 한국식품영양과학회 2014 Journal of medicinal food Vol.17 No.3
The antibiofilm and antibacterial properties against Pseudomonas aeruginosa and Staphylococcus epidermidis and chemical characterization of six hydroethanolic blueberry extracts (blueberry rabbiteye—Vaccinium virgatum) from different cultivars and means of propagation were investigated. The total flavonoid, anthocyanin, and phenolic contents were determined by specific and well-established methods. Among the cultivars, Briteblue showed the lowest content of all metabolites analyzed, while Bluegem showed the highest concentrations of these compounds. All the micropropagated cultivars presented the highest amounts of chlorogenic acid. The blueberry fruit extracts showed strong activity against S. epidermidis biofilm (up to 84% inhibition) without inhibiting bacterial growth. Likewise, Bluegem micropropagated extract, which had the highest anthocyanin, flavonoids, and phenolic compound content, demonstrated the highest S. epidermidis biofilm inhibitory effect. Finally, a linear correlation between the total phenolic content and the percentage of biofilm inhibition was observed.