A bioequivalence of $Melax^{TM}$ capsules (Chong Kun Dang Pharm., Korea) and $Mobic^{TM}$ capsules (Boehringer Ingelheim Korea) was evaluated according to the guideline of Korea Food and Drug Administration (KFDA). Single 15 mg dose of meloxicam of each medicine was administered orally to 24 healthy male volunteers. This study was performed in a $2\;{\times}\;2$ crossover design. Concentrations of meloxicam in human plasma were monitored by a high-performance liquid chromatography. $AUC_t$ (the area under the plasma concentration-time curve from time zero to 72 hr) was calculated by the linear trapezoidal rule method. $C_{max}$ (maximum plasma drug concentration) and $T_{max}$ (time to reach $C_{max}$) were compiled from the plasma concentration-time data. Analysis of variance was performed using logarithmically transformed $AUC_t$ and $C_{max}$. No significant sequence effect was found for all of the bioavailability parameters. The 90% confidence intervals of the $AUC_t$ ratio and the $C_{max}$ ratio for $Melax^{TM}/Mobic^{TM}$ were 0.95 - 1.04 and 0.98 - 1.14, respectively. This study demonstrated a bioequivalence of $Melax^{TM}$ and $Mobic^{TM}$ with respect to the rate and extent of absorption.
Behinaein, Pegah;Cotsovos, Demetrios M.;Abbas, Ali A.
Computers and Concrete
/
v.22
no.3
/
pp.337-353
/
2018
The present study focuses on examining the structural behaviour of steel-fibre-reinforced concrete (SFRC) beams under high rates of loading largely associated with impact problems. Fibres are added to the concrete mix to enhance ductility and energy absorption, which is important for impact-resistant design. A simple, yet practical non-linear finite-element analysis (NLFEA) model was used in the present study. Experimental static and impact tests were also carried out on beams spanning 1.3 meter with weights dropped from heights of 1.5 m and 2.5 m, respectively. The numerical model realistically describes the fully-brittle tensile behaviour of plain concrete as well as the contribution of steel fibres to the post-cracking response (the latter was allowed for by conveniently adjusting the constitutive relations for plain concrete, mainly in uniaxial tension). Suitable material relations (describing compression, tension and shear) were selected for SFRC and incorporated into ABAQUS software Brittle Cracking concrete model. A more complex model (i.e., the Damaged Plasticity concrete model in ABAQUS) was also considered and it was found that the seemingly simple (but fundamental) Brittle Cracking model yielded reliable results. Published data obtained from drop-weight experimental tests on RC and SFRC beams indicates that there is an increase in the maximum load recorded (compared to the corresponding static one) and a reduction in the portion of the beam span reacting to the impact load. However, there is considerable scatter and the specimens were often tested to complete destruction and thus yielding post-failure characteristics of little design value and making it difficult to pinpoint the actual load-carrying capacity and identify the associated true ultimate limit state (ULS). To address this, dynamic NLFEA was employed and the impact load applied was reduced gradually and applied in pulses to pinpoint the actual failure point. Different case studies were considered covering impact loading responses at both the material and structural levels as well as comparisons between RC and SFRC specimens. Steel fibres were found to increase the load-carrying capacity and deformability by offering better control over the cracking process concrete undergoes and allowing the impact energy to be absorbed more effectively compared to conventional RC members. This is useful for impact-resistant design of SFRC beams.
Kim, Yong-Won;Park, Wan-Su;Kim, Sung-Su;Seo, Ji-Hyung;Cho, Sung-Hee;Lee, Heon-Woo;Rew, Jae-Hwan;Lee, Kyung-Tae
Journal of Pharmaceutical Investigation
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v.36
no.2
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pp.131-136
/
2006
The purpose of the present study was to evaluate the bioequivalence of two losartan tablets, $Cozaar^{TM}$ tablet (MSD Korea. Co., Ltd., Seoul, Korea, reference drug) and $Losartan^{TM}$ tablet (DaeWon Pharm. Co., Ltd., Korea, test drug), according to the guidelines of Korea Food and Drug Administration (KFDA). Twenty-four healthy male Korean volunteers received two tablets at the losartan kalium dose of 100 mg in a $2\;{\time}\;2$ crossover study. There was a one-week washout period between the doses. Plasma concentrations of losartan were monitored by an LC-MS/MS for over a period of 12 hr after the administration. $AUC_t$ (the area under the plasma concentration-time curve from time zero to 12 hr) was calculated by the linear trapezoidal rule method. $C_{max}$ (maximum plasma drug concentration) and $T_{max}$ (time to reach $C_{max}$) were compiled from the plasma concentration-time data. Analysis of variance was carried out using logarithmically transformed $AUC_t$ and $C_{max}$. No significant sequence effect was found for all of the bioavailability parameters indicating that the crossover design was properly performed. The 90% confidence intervals of the $AUC_t$ ratio and the $C_{max}$ ratio for $Cozaar^{TM}/Losartan^{TM}$ were $log\;0.97{\sim}log\;1.12\;and\;log\;0.93{\sim}log\;1.23$, respectively. These values were within the acceptable bioequivalence intervals of $log\;0.80{\sim}log\;1.25$. Taken together, our study demonstrated the bioequivalence of $Cozaar^{TM}$ and $Losartan^TM$ with respect to the rate and extent of absorption.
A bioequivalence of Daewoong $Alendronate^{TM}$ (Daewoong Pharmaceutical Co., Ltd., Korea) and $Fosamax^{TM}$ tablets (MSD Korea) was evaluated according to the guideline of Korea Food and Drug Administration (KFDA). A single 70 mg dose of sodium alendronate of each medicine was administered orally to 56 healthy male volunteers. This study was performed in a $2\;{\time}\;2$ crossover design. Concentrations of alendronate in the urine were monitored by a high-performance liquid chromatography (HPLC). $A_{et}$ (cumulative urinary excreted amount from time 0 to last sampling interval) was calculated by the accumulation of the urinary excreted alendronate. $U_{max}$ (maximum urinary excretion rate) and $T_{max}$ (time to reach $U_{max}$) were compiled from the urinary excretion rate - time data. Analysis of variance was performed using logarithmically transformed $A_{et}$ and $U_{max}$. No significant sequence effect was found for all of the bioavailability parameters. The 90% confidence intervals of the $A_{et}$ and $U_{max}$ for Daewoong $Alendronate^{TM}/Fosamax^{TM}$ were 0.89-1.12 and 0.82-1.02, respectively. This study demonstrated the bioequivalence of Daewoong $Alendronate^{TM}$ and $Fosamax^{TM}$ with respect to the rate and extent of absorption.
A bioequivalence study of $Nimegen^{TM}$ soft capsule (Medica Korea Pharma. Co., Ltd.) to $RoAccutane^{(R)}$ soft capsule (Roche Korea Ind. Co., Ltd.) was conducted according to the guidelines of Korea Food and Drug Administration (KFDA). Thirty healthy male Korean volunteers received each medicine at the isotretinoin dose of 60 mg in a $2{\times}2$ crossover study. There was one week wash-out period between the doses. Plasma concentrations of isotretinoin were monitored by a high performance liquid chromatography (HPLC) for over a period of 48 hours after drug administration. $AUC_t$ (the area under the plasma concentration-time curve from time zero to 48 hr) was calculated by the linear trapezoidal rule method. $C_{MAX}$ (maximum plasma drug concentration) and $T_{MAX}$ (time to reach $C_{MAX}$) were compiled from the plasma concentration-time data. Analysis of variance was carried out using logarithmically transformed $AUC_t\;and\;C_{MAX}$. No significant sequence effect was found for all of the bioavailability parameters indicating that the crossover design was properly performed. The 90% confidence intervals of the $AUC_t$ ratio and the $C_{MAX}$ ratio for $Nimegen^{TM}/RoAccutane^{(R)}$ were $log0.860{\sim}log0.98\;and\;log0.85{\sim}log1.00$, respectively. These values were within the acceptable bioequivalence intervals of $log0.80{\sim}log1.25$. Thus, our study demonstrated the bioequivalence of $Nimegen^{TM}\;and\;RoAccutane^{(R)}$ with respect to the rate and extent of absorption.
The purpose of the present study was to evaluate the bioequivalence of two pioglitazone HCl tablets, $Actos^{TM}$, tablets (Lilly Korea. Ltd., Korea) as a reference drug and $Piros^{TM}$, tablets (Reyon Pharm. Co., Ltd., Korea) as test drug, according to the guideline of Korea Food and Drug Administration (KFDA). Twenty-four healthy male Korean volunteers received one tablet containing pioglitazone HCl 15 mg in a $2{\times}2$ crossover study. There was a one-week washout period between the doses. Plasma concentrations of pioglitazone were monitored for over a period of 36 hr after administration by using a high performance liquid chromatography-tandem mass spectrometry (LC-MS/MS). The area under the plasma concentration-time curve from time zero to 36 hr ($AUC_{0-36hr}$), maximum plasma drug concentration ($C_{max}$) and time to reach $C_{max}$ ($T_{max}$) were complied from the plasma concentration-time data. Analysis of variance (ANOVA) test was utilized for the statistical analysis of the parameters using logarithmically transformed $AUC_{0-36hr}$ and $C_{max}$. The 90% confidence intervals of the $AUC_{0-36hr}$ ratio and the $C_{max}$ ratio for $Piros^{TM}$/$Actos^{TM}$. were log 0.8753-log 1.1286 and log 0.8669-log 1.1734, respectively. These values were within the acceptable bioequivalence intervals of log 0.80-log 1.25, recommended by KFDA. In all of these results, we concluded that the $Piros^{TM}$. tablet was bioequivalent to the $Actos^{TM}$. tablet, based on the rate and extent of absorption.
The purpose of this study was to evaluate the bioequivalence of two nateglinide tablets, $PASTIC^{(R)}$ tablet (ILDONG Pharm. Co., Ltd., Seoul, Korea, reference drug) and $GLUNATE^{(R)}$ tablet (ILHWA. Co., Ltd., Seoul, Korea, test drug), according to the guidelines of Korea Food and Drug Administration (KFDA). Thirty-five healthy male volunteers, $23.1{\pm}2.3$ years in age and $69.2{\pm}8.8\;kg$ in body weight, were divided into two groups and a randomized $2{\times}2$ cross-over study was employed. After a tablet containing 90 mg of nateglinide was orally administrated, blood was taken at predetermined time intervals over a period of 8 hr and concentrations of nateglinide in plasma were monitored using LC-MS/MS. Pharmacokinetic parameters such as AUCt (the area under the plasma concentration-time curve from time 0 to 8 hr), $C_{max}$ (maximum plasma drug concentration) and $TC_{max}$ (time to reach $CC_{max}$) were calculated and analysis of variance (ANOVA) test was utilized for the statistical analysis of the parameters using logarithmically transformed $AUC_t$ and $C_{max}$ and untransformed $T_{max}$. The 90% confidence intervals of the $AUC_t$ ratio and the $C_{max}$ ratio for $GLUNATE^{(R)}/PASTIC^{(R)}$ were ${\log}1.0782{\sim}{\log}1.1626$ and ${\log}0.9621{\sim}{\log}1.1679$, respectively. Since these values were within the acceptable bioequivalence intervals of ${\log}0.80{\sim}{\log}1.25$, recommended by KFDA, it was concluded that $GLUNATER^{(R)}$ tablet was bioequivalent to $PASTIC^{(R)}$ tablet, in terms of both rate and extent of absorption.
The purpose of the present study was to evaluate the bioequivalence of meloxicam capsule, $Mobic^{TM}$ capsule( Boehringer Ingelheim Ltd., Korea) as a reference drug and $Meloxifen^{TM}$ capsule (Kukje Pharma Ind. Co., Ltd., Korea) as a test drug, according to the guidelines of Korea Food and Drug Administration(KFDA). Thirty two healthy male Korean volunteers received capsule containing meloxicam 7.5 mg in a $2{\times}2$ crossover study. There was a one-week above washout period between the doses. Plasma concentrations of meloxicam were monitored for over a period of 72 hr after administration by using a high performance liquid chromatography-tandem mass spectrometer(LC-MS/MS). $AUC_t$(the area under the plasma concentration-time curve from time zero to 72 hr), $C_{max}$(maximum plasma drug concentration) and $T_{max}$(time to reach $C_{max}$) were complied from the plasma concentration-time data. Analysis of variance(ANOVA) test was utilized for the statistical analysis of the parameters using logarithmically transformed $AUC_t$ and $C_{max}$. The 90% confidence intervals of the $AUC_t$ ratio and the $C_{max}$ ratio for $Meloxifen^{TM}/Mobic^{TM}$ were log 0.8605-log 0.9847 and log 0.9765-log 1.1503, respectively. These values were within the acceptable bioequivalence intervals of log 0.80-log 1.25, recommended by KFDA. In all of these results, we concluded that $Meloxifen^{TM}$ capsule was bioequivalent to $Mobic^{TM}$ capsule, based on the rate and extent of absorption.
Purpose: The purpose of this study was to design and build an optimized birdcage resonator configuration with a low pass filter, which would facilitate the acquisition of high-resolution 3D-image of small animals at 3T MRI system. Methods and Materials: The birdcage resonator with 12-element structures was built, in order to ensure B1 homogeneity over the image volume and maximum filling factor, and hence to maximize the signal to noise ratio (SNR) and resolution of the 3-dimensional images. The diameter and length of each element of a birdcage resonator were as follows: (1) diameter 13 cm, length 22 cm, (2) diameter 15 cm, length 22 cm, (3) diameter 17 cm, length 25 cm. Spin echo pulse sequence and fast spin echo pulse sequence were employed in obtaining MR images. The quality of the manufactured birdcage resonators wes evaluated on the basis of the return loss following matching and tuning process. Results: The experimental MR image of phantoms by the various manufactured birdcage resonators were obtained to compare the SNR in accordance with the size of objects. The size of an object to that of coil was identified by parameters that were estimated from the image of a phantom. First, the diameter of the birdcage resonator was 15cm, and the ratio of the tangerine to the birdcage resonator accounted for approximately 27%. The Q factor was 53.2 and the SNR was 150.7. Second, at the same birdcage resonator, the ratio of the orange was approximately 53%. The SNR and the Q parameter was 212.8 and 91.2, respectively. Conclusion: The present study demonstrated that if birdcage resonators have the same forms, SNR could be different depending on the size of an object, especially when the size of an object to that of coil is approximately 40~80%, the former is bigger than the latter. Therefore, when the size of an object to be observed is smaller than that of coil, the coil should be manufactured in accordance with the size of an object in order to obtain much more excellent images.
Journal of the Korea Academia-Industrial cooperation Society
/
v.19
no.4
/
pp.532-542
/
2018
Because maglev trains have a propulsion and absorption force without contact with the rails, they can drive safely at high-speed with little oscillation. Recently, test model of a maglev propulsion train was produced and operated, and has since been chosen as a national growth industry in South Korea; there have been many studies and considerable investment in these fields. This study examined the dynamic responses due to bridge-maglev train interaction and basic material to design bridges for maglev trains travelling at high-speed. Depending on the major factors affecting the dynamic effects, the scope of this study was restricted to the relationship between dynamic responses. A concrete box girder was chosen as a bridge model and injured train and rail types in domestic production were selected as the moving train load and guideway analysis model, respectively. From the analysis results, the natural frequency of a bridge for a maglev train, which has a deflection limit L/2000, was higher than those of bridges for general trains. The dynamic responses of the girder of the bridge for a maglev train showed a substantial increase in proportion to the velocities of the moving train like other general bridge cases. Maximum dynamic response of the girder is shown at a moving velocity of 240km/h and increased with increasing moving velocity of train. These results can be used to design a bridge for maglev propulsion trains and provide the basic data to confirm the validity and verification of the design code.
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