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송성훈,박진영,이행자,조홍식,장상목 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2
The phase transition phenomena and the phase separation phenomena of surfactants(SPES) are analyzed using QCA with resonant frequency and resonant resistance. The phase transition phenomena of SPES at 30℃ can be determined by measuring the resonant frequency and resonant resistance by lecithin coated on quartz crystal. The surfactants capacity of SPES can be analyzed by measuring the resonant frequency and resonant resistance of surfactants using QCA.
Hong, Sang‐,Mo,Park, Cheol‐,Young,Hwang, Dong‐,Min,Han, Kyung Ah,Lee, Chang Beom,Chung, Choon Hee,Yoon, Kun‐,Ho,Mok, Ji‐,Oh,Park, Kyong Soo,Park, Sung‐,Woo Blackwell Publishing Ltd 2017 Diabetes, obesity & metabolism Vol.19 No.5
<P><B>Aims</B></P><P>This trial consisted of a 24‐week multicentre, randomized, double‐blind, double‐dummy, active‐controlled study and a 52‐week open label extension study to assess the efficacy and safety of evogliptin, a novel dipeptidyl peptidase‐4 inhibitor, compared to sitagliptin in patients with type 2 diabetes who have inadequate glycaemic control with metformin alone.</P><P><B>Methods</B></P><P>Adult patients with type 2 diabetes mellitus (N = 222) with HbA1c 6.5% to 11% who were receiving stable doses of metformin (≥1000 mg/d) were randomized 1:1 to add‐on evogliptin 5 mg (N = 112) or sitagliptin 100 mg (N = 110) once daily for 24 weeks. The primary efficacy analysis consisted of a comparison of the change from baseline HbA1c at week 24. Non‐inferiority was concluded if the upper limit of the 2‐sided 95% confidence interval for the HbA1c difference between treatments was <0.35%.</P><P><B>Results</B></P><P>Mean changes in HbA1c following addition of evogliptin or sitagliptin were −0.59% and −0.65%, respectively. The between‐group difference was 0.06% (2‐sided 95% confidence interval, −0.10 to 0.22), demonstrating non‐inferiority. After the 52‐week treatment, evogliptin caused a persistently decreased level of HbA1c (−0.44% ± 0.65%, P < .0001). In general, both treatments were well tolerated, with incidences and types of adverse events comparable between the two groups. Hypoglycaemic events, mostly mild, were reported in 0.9% of patients treated with evogliptin and in 2.8% of patients treated with sitagliptin for 24 weeks.</P><P><B>Conclusions</B></P><P>Evogliptin 5 mg added to metformin therapy effectively improved glycaemic control and was non‐inferior to sitagliptin and well tolerated in patients with type 2 diabetes mellitus that was inadequately controlled by metformin alone.</P>
Presence of glioma stroma mesenchymal stem cells in a murine orthotopic glioma model.
Kim, Sang-Mok,Kang, Seok-Gu,Park, Na-Ri,Mok, Hyun-Su,Huh, Yong-Min,Lee, Su-Jae,Jeun, Sin-Soo,Hong, Yong-Kil,Park, Chun-Kun,Lang, Frederick F Springer Verlag 2011 Child's nervous system Vol.27 No.6
<P>High-grade gliomas are closely related to the mesenchymal phenotype which might be explained by unorthodox differentiation of glioma cancer stem cells (gCSCs). We reasoned that other non-neural stem cells, especially mesenchymal stem cells (MSCs), might play a role in expressing mesenchymal phenotype of high-grade gliomas. Thus we hypothesized that cells resembling MSCs exist in glioma specimens.</P>
BaPr_(1-x)YbXO_(3-δ) (X=0.1, 0.2, 0.3)계 페롭스카이트 산화물의 전기전도도
박형경,최순목,김신,이홍림 연세대학교 산업기술연구소 2000 논문집 Vol.32 No.1
Samples of the system BaPr_(1-x)YbXO_(3-δ) were prepared in the composition range of 0.1mole<X<0.5mole Yb^(3+) by the solid state reaction method. XRD measurements showed that the maximum doping level was 0.3mole YbO1.5 in BaPrO3 to obtain the single phase of the structure of BaPrO_3. The electrical conductivity was observed for the composition range of 0.1mole < X < 0.3mole Yb^(3+) in BaPrO_3. The electrical conductivity of BaPr_(1-x)YbXO_(3-δ)(X=0.1-0.3) in wet atmosphere was lower than that in dry atmosphere. It is, therefore, considered that the electrical conductivity of this system was decreased due to the consumption of the holes under the water vapor.
Reductively Dissociable siRNA‐Polymer Hybrid Nanogels for Efficient Targeted Gene Silencing
Hong, Cheol Am,Kim, Jee Seon,Lee, Soo Hyeon,Kong, Won Ho,Park, Tae Gwan,Mok, Hyejung,Nam, Yoon Sung WILEY‐VCH Verlag 2013 Advanced functional materials Vol.23 No.3
<P><B>Abstract</B></P><P>A highly efficient approach for target‐specific gene silencing based on a reductively dissociable nanogel incorporating small interfering RNA (siRNA) crosslinked with linear polyethylenimine (LPEI) via disulfide bonds is presented. Thiol‐terminated siRNA at both 3′‐ends is electrostatically complexed with thiol‐grafted LPEI. The prepared siRNA/LPEI complex contains inter‐ and intramolecular linkages, generating a mutually crosslinked siRNA/LPEI nanogel (MCN) that exhibits excellent structural stability against the addition of heparin but is readily disintegrated to biologically active, monomeric siRNA upon exposure to reductive conditions. Accordingly, the highly condensed, stable MCN shows greatly enhanced cellular uptake and gene silencing efficiency compared to the siRNA/LPEI complexes without crosslinks or with only LPEI‐mediated crosslinks.</P>
Park, Nung-Seo,Jang, Min-Ho,Lee, Jee-Sang,Hong, Keum-Shik,Kim, Jang-Mok The Korean Institute of Power Electronics 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.5
Sensorless control methods are generally used in motor control for home-appliances because of the material cost and manufactureing standard restrictions. The current model-based control algorithm is mainly used for PMSM sensorless control in the home-appliance industry. In this control method, the rotor position is estimated by using the d-axis and q-axis current errors between the real system and a motor model of the position estimator. As a result, the accuracy of the motor model parameters are critical in this control method. A mismatch of the PMSM parameters affects the speed and torque in low speed, steadystate responses. Rotor position errors are mainly caused by a mismatch of the stator resistance. In this paper, a stator resistance compensation algorithm is proposed to improve sensorless control performance. This algorithm is easy to implement and does not require a modification of the motor model or any special interruptions of the controller. The effectiveness of the proposed algorithm is verified through experimental results.