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Ryu, Ka Yeon,Sung, Dan-Bi,Won, Suk-Young,Jo, Ara,Ahn, Kyusang,Kim, Hyun Yeong,ArulKashmir, Arulraj,Kwak, Kyungwon,Lee, Chongmok,Kim, Won-Suk,Kim, Kyungkon Elsevier 2018 Dyes and pigments Vol.149 No.-
<P><B>Abstract</B></P> <P>New small molecular semiconductors with small band gap and low-lying highest occupied molecular orbital (<I>E</I> <SUB>HOMO</SUB>), namely TBDPPOT, TBDPPEH, and TBDPPEHT4 were synthesized by incorporating the B←N bridged thienylthiazole and diketopyrrolopyrrole (DPP) derivatives. TBDPPOT and TBDPPEH were prepared, respectively, using two different DPPs having 1-octyl and 2-ethylhexyl moiety as the solubilizing group. In addition, the band gap of the TBDPPEH is further reduced by introducing planar thienothiophene unit, which was used for the preparation of TBDPPEHT4. These synthesized SMs are blended with fullerene derivative to construct a photo-active layer for organic photovoltaics. Among OPVs utilizing those SMs, the TBDPPEH exhibits highest power conversion efficiency of 3.21% with an exceptionally high <I>V</I> <SUB>OC</SUB> of 0.92 V, which is ascribed to low-lying HOMO energy level of −5.62 eV. It is expected that the utilization of TBDPPEH as a photo-active layer for OPVs would enhance the oxidation stability of the OPVs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Small molecular semiconductors with low-lying HOMO were synthesized. </LI> <LI> These molecules contain B←N bridged thienylthiazole and diketopyrrolopyrrole derivatives. </LI> <LI> Solar cell based on those molecules exhibited high <I>V</I> <SUB>OC</SUB> values. </LI> </UL> </P>
Dan Bi Song,Yeunchul Ryu 한국자기학회 2020 Journal of Magnetics Vol.25 No.4
In recent years, studies have been conducted to confirm the battery charge/discharge state using a magnetic resonance (MR) system. However, due to the structural characteristics of the battery, some difficulties exist in acquiring the signal. For example, because a loop coil does not coincide with the battery cell structure, non-uniform areas exist inside the cell samples, and it works as a limit to acquiring a quantitative MR signal measuring from the pack of lithium-ion batteries (LIB). In addition, the radio-frequency (RF) signals are weakened by the aluminum layer of the cell package. In this paper, we proposed a planar RF coil to obtain uniform ¹H and <SUP>7</SUP>Li signals from this shielding-packaged battery cell in 7 Tesla (T) magnetic resonance image (MRI). To demonstrate the usefulness of the proposed planar RF coil, we designed a loop coil for ¹H and <SUP>7</SUP>Li, a planar coil for ¹H, and a cut coil for ¹H and <SUP>7</SUP>Li. Then the performance of each coil was compared through a bench test. The water phantom image was acquired with each coil, and the signal intensity profile and signal-to-noise ratio (SNR) were calculated and compared. The ¹H/<SUP>7</SUP>Li images and spectra of the electrolyte phantom were obtained using the cut coils, and the results were compared with the phantom.
대체감미료 사용이 백설기의 이화학적·관능적 특성 및 저장 중 경도변화에 미치는 영향
류다연(Dayeon Ryu),김단비(Dan Bi Kim),이경환(Kyung Hwan Lee),손동성(Dong Sung Son),서정희(Jeonghee Surh) 한국식품과학회 2012 한국식품과학회지 Vol.44 No.5
Baksulgi with various sugar substitutes was prepared and characterized for physicochemical and sensory qualities. The 10% sugar in a control baksulgi was replaced with 16.1% glucose, 13.3% erythritol, 10.2% xylitol, 0.2% stevioside (enzymatically modified stevia 100%), 0.05% aspartame, or 1.2% sucralose. Instrumental and sensory analyses indicated that the baksulgi with glucose was significantly different in color from the others, which was attributed to high susceptibility to browning reaction of the glucose. Baksulgi with aspartame showed significantly lower pH than that of control baksulgi, suggesting that the aspartame might have been hydrolyzed into its constituent amino acids under elevated steaming temperature. A sensory evaluation revealed that baksulgi with sucralose or xylitol was comparable to the control baksulgi in all sensory characteristics. However, the baksulgi with sucralose showed appreciably increased hardness with increased storage time at 4oC, partially due to the anhygroscopic property of sucralose.
Kim, Seung Cheol,Song, Yong Sang,Kim, Young-Tae,Kim, Young Tak,Ryu, Ki-Sung,Gunapalaiah, Bhavyashree,Bi, Dan,Bock, Hans L,Park, Jong-Sup Korean Society of Gynecologic Oncology and Colposc 2011 Journal of Gynecologic Oncology Vol.22 No.2
<P><B>Objective</B></P><P>The study assessed the immunogenicity and safety of human papillomavirus (HPV)-16/18 AS04-adjuvanted cervical cancer vaccine in healthy Korean women aged 15-25 years.</P><P><B>Methods</B></P><P>Phase IIIB, double-blind, randomised (2:1), multi-centre trial was conducted in Korea from June 2007 to March 2008. The study enrolled 225 women in the HPV (N=149) and placebo (N=76) groups who received three doses of HPV-16/18 AS04-adjuvanted vaccine or placebo (aluminium hydroxide) administered intramuscularly at 0, 1, and 6 months and were followed until one month post-dose 3. Serum samples were collected pre-vaccination and one month post-dose 3. Safety and reactogenicity data were collected throughout.</P><P><B>Results</B></P><P>In this trial, 208 women completed the study (141 in HPV group; 67 in placebo group). At month 7, all initially seronegative women had seroconverted for HPV-16 and HPV-18 antibodies with anti-HPV-16 and anti-HPV-18 geometric mean titres of 9,351.4 El.U/mL (95% CI, 8,145.5 to 10,735.8) and 4204.1 El.U/mL (95% CI, 3,626.5 to 4,873.6), respectively. Initially seropositive women showed similar increase in geometric mean titre levels. Compliance to the three dose vaccination course was 95.3% in HPV and 89.5% in placebo group. Solicited local (pain) and general (fatigue, myalgia or headache) symptoms were commonly reported in both groups. Three serious adverse events were reported (two in HPV group; one in placebo group), all unrelated to vaccination by the investigator; all recovered.</P><P><B>Conclusion</B></P><P>The HPV-16/18 AS04-adjuvanted vaccine was highly immunogenic with a clinically acceptable safety profile in Korean women. This study was in line with previous global studies in Europe, North America, and Brazil. (ClinicalTrials.gov number, NCT 00485732.)</P>