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Hunter, Allison,Kalathingal, Sajitha,Shrout, Michael,Plummer, Kevin,Looney, Stephen Korean Academy of Oral and Maxillofacial Radiology 2014 Imaging Science in Dentistry Vol.44 No.2
Purpose: This study assessed the effectiveness of three antimicrobial mouthrinses in reducing microbial growth on photostimulable phosphor (PSP) plates. Materials and Methods: Prior to performing a full-mouth radiographic survey (FMX), subjects were asked to rinse with one of the three test rinses ($Listerine^{(R)}$, $Decapinol^{(R)}$, or chlorhexidine oral rinse 0.12%) or to refrain from rinsing. Four PSP plates were sampled from each FMX through collection into sterile containers upon exiting the scanner. Flame-sterilized forceps were used to transfer the PSP plates onto blood agar plates (5% sheep blood agar). The blood agar plates were incubated at $37^{\circ}C$ for up to 72 h. An environmental control blood agar plate was incubated with each batch. Additionally, for control, 25 gas-sterilized PSP plates were plated onto blood agar and analyzed. Results: The mean number of bacterial colonies per plate was the lowest in the chlorhexidine group, followed by the Decapinol, Listerine, and the no rinse negative control groups. Only the chlorhexidine and Listerine groups were significantly different (p=0.005). No growth was observed for the 25 gas-sterilized control plates or the environmental control blood agar plates. Conclusion: The mean number of bacterial colonies was the lowest in the chlorhexidine group, followed by the Decapinol, Listerine, and the no rinse groups. Nonetheless, a statistically significant difference was found only in the case of Listerine. Additional research is needed to test whether a higher concentration (0.2%) or longer exposure period (two consecutive 30 s rinse periods) would be helpful in reducing PSP plate contamination further with chlorhexidine.
Fabrication of Piezoelectric O-3 Glass Composites
Lee, Gye Song,Shrout, T.R.,Kim, Hyung Sik 경북대학교 센서기술연구소 1990 센서技術學術大會論文集 Vol.1 No.1
Piezoelectric 0-3 glass composites for high temperature and wide area applications were developed by firing a mixture of modified PbTiO_(3) and lead-based glass powder. Sintering of the 0-3 piezoelectric composites was dependent upon the firing temperature and the amount of glass phase. Piezoelectric 0-3 composites with 41-72 vol% ceramic, fired at 450°C, showed dielectric constants, K, ~45-100, piezoelectric g_(33) coefficients ~13-20 x 10^(-3) Vm/N and piezoelectric d_(33) coefficients ~5-15 x 10^(-12) C/N which were found to be comparable to those of polar glass-ceramic.
High Temperature Capacitors using a BiScO_3-BaTiO_3-(K_(1/2)Bi_(1/2))TiO_3 Ternary System
Jong Bong Lim,Shujun Zhang,Thomas R. Shrout 대한금속·재료학회 2011 ELECTRONIC MATERIALS LETTERS Vol.7 No.1
BiScO_3-BaTiO_3 with (K_(1/2)Bi_(1/2))TiO_3 [BSBT-KBTx] in the perovskite solid solution system were prepared by conventional ceramic processing for potential high temperature capacitors. The effect of KBT on the dielectric properties of BSBT was investigated as a function of temperature and frequency. The BSBT-KBT20 exhibited high dielectric permittivity and low dielectric loss over the temperature range from 100°C to 300°C with flat coefficients of temperature (TCεs). In addition, BSBT-KBTx were observed to possess dielectric relaxation behavior at temperatures (> RT) as observed in lead-based relaxors. Furthermore, the E-field polarization behavior was investigated showing high energy density of 1.28 J/cm^3 at 100 kV/cm for the BSBT-KBT20.
Allison Hunter,Sajitha Kalathingal,Michael Shrout,Kevin Plummer,Stephen Looney 대한영상치의학회 2014 Imaging Science in Dentistry Vol.44 No.2
Purpose: This study assessed the effectiveness of three antimicrobial mouthrinses in reducing microbial growth on photostimulable phosphor (PSP) plates. Materials and Methods: Prior to performing a full-mouth radiographic survey (FMX), subjects were asked to rinse with one of the three test rinses (Listerine®, Decapinol®, or chlorhexidine oral rinse 0.12%) or to refrain from rinsing. Four PSP plates were sampled from each FMX through collection into sterile containers upon exiting the scanner. Flame-sterilized forceps were used to transfer the PSP plates onto blood agar plates (5% sheep blood agar). The blood agar plates were incubated at 37ºC for up to 72 h. An environmental control blood agar plate was incubated with each batch. Additionally, for control, 25 gas-sterilized PSP plates were plated onto blood agar and analyzed. Results: The mean number of bacterial colonies per plate was the lowest in the chlorhexidine group, followed by the Decapinol, Listerine, and the no rinse negative control groups. Only the chlorhexidine and Listerine groups were significantly different (p=0.005). No growth was observed for the 25 gas-sterilized control plates or the environmental control blood agar plates. Conclusion: The mean number of bacterial colonies was the lowest in the chlorhexidine group, followed by the Decapinol, Listerine, and the no rinse groups. Nonetheless, a statistically significant difference was found only in the case of Listerine. Additional research is needed to test whether a higher concentration (0.2%) or longer exposure period (two consecutive 30 s rinse periods) would be helpful in reducing PSP plate contamination further with chlorhexidine.