태양광 물 분해를 통한 수소 생산용 Cu₂O/CuO 이종접합 광전극의 제작 및 광전기화학적 특성

김소영,김효진,홍순구,김도진,Kim, Soyoung,Kim, Hyojin,Hong, Soon-Ku,Kim, Dojin 한국재료학회 2016 한국재료학회지 Vol.26 No.11

We report on the fabrication and characterization of a novel $Cu_2O/CuO$ heterojunction structure with CuO nanorods embedded in $Cu_2O$ thin film as an efficient photocathode for photoelectrochemical (PEC) solar water splitting. A CuO nanorod array was first prepared on an indium-tin-oxide-coated glass substrate via a seed-mediated hydrothermal synthesis method; then, a $Cu_2O$ thin film was electrodeposited onto the CuO nanorod array to form an oxide semiconductor heterostructure. The crystalline phases and morphologies of the heterojunction materials were examined using X-ray diffraction and scanning electron microscopy, as well as Raman scattering. The PEC properties of the fabricated $Cu_2O/CuO$ heterojunction photocathode were evaluated by photocurrent conversion efficiency measurements under white light illumination. From the observed PEC current density versus voltage (J-V) behavior, the $Cu_2O/CuO$ photocathode was found to exhibit negligible dark current and high photocurrent density, e.g. $-1.05mA/cm^2$ at -0.6 V vs. $Hg/HgCl_2$ in $1mM\;Na_2SO_4$ electrolyte, revealing the effective operation of the oxide heterostructure. The photocurrent conversion efficiency of the $Cu_2O/CuO$ photocathode was estimated to be 1.27% at -0.6 V vs. $Hg/HgCl_2$. Moreover, the PEC current density versus time (J-T) profile measured at -0.5 V vs. $Hg/HgCl_2$ on the $Cu_2O/CuO$ photocathode indicated a 3-fold increase in the photocurrent density compared to that of a simple $Cu_2O$ thin film photocathode. The improved PEC performance was attributed to a certain synergistic effect of the bilayer heterostructure on the light absorption and electron-hole recombination processes.

갈색거저리(Tenebrio molitor) 유충의 냉장 저장 중 산화 안정성에 관한 연구

김소영,손양주,김수희,김안나,이금양,황인경,Kim, So-Young,Son, Yang-Ju,Kim, Soo-Hee,Kim, An-Na,Lee, Geum-Yang,Hwang, In-Kyeong 한국식품조리과학회 2015 한국식품조리과학회지 Vol.31 No.1

The purpose of this study was to evaluate the changes on the characteristics of the oxidative stability of Tenebrio molitor larvae during cold storage at $4^{\circ}C$. Pretreatment for T. molitor larvae was designed into three methods: raw (R), freeze-dried (F.D.), and pan-fried (P.F.). The water content of the raw sample (61.46%) was higher than those of other samples (F.D.: 5.02%, P.F.: 3.67%) and its high water content was expected to facilitate the oxidation of the raw sample. In our results, the peroxide value and the carbonyl value of all of the samples increased and the raw sample, after storage for 18 day, showed the highest value. The pan-fried sample had no significant increase in its lactic acid content, acid value, and thiobarbituric acid value; whereas those values were increased in the raw sample and the freeze-dried sample (p<0.05). The browning reaction was more progressed in the pan-fried sample than other samples at 0 day, but there was no significant change during the storage. The raw sample and the freeze-dried sample had their browning indexes increase with the increasing storage period (p<0.05). The pan-fried sample produced less oxidation products than the freeze-dried sample, indicating that the unheated sample was more susceptible to oxidation than the heated samples. In conclusion, heating treatment and low water content would be effective for improving the safety and stability of T. molitor larvae during cold storage.

다가불포화지방산의 공역이중결합 유도체가 흰쥐의 혈청 지질 성분에 미치는 영향

김소영,김성희,김경업,Kim, So-Young,Kim, Sung-Hee,Kim, Gyeong-Eup 한국식품영양과학회 2007 한국식품영양과학회지 Vol.36 No.9

n-6계 linoleic acid의 함량이 높은 옥수수유 및 n-3계 linolenic acid의 함량이 높은 들깨유와 함유된 다가불포화지방산을 공역이중결합 유도체화 처리한 옥수수유 및 들깨유가 흰쥐의 혈청 지질개선에 미치는 영향을 비교 검토하기 위하여 S.D.계 숫 흰쥐에게 돈지 식이를 대조군으로 하고 옥수수유 10%, 들깨유 10%, 유도체화 처리한 옥수수유 10% 및 유도체화 처리한 들깨유 10%을 급여하여 4주간 실험 사육한 후 혈청 지질성분을 분석하였다. 유도체화 처리한 옥수수유(TCO)는 가스 크로마토그래피에 의해 3개의 linoleic acid의 유도체가 확인되었고 유도체화 처리한 들깨유(TPO)에서는 5개의 linolenic acid의 유도체가 확인되었다. 체중증가량 및 식이섭취량은 유도체화 처리한 옥수수유 및 들깨유 급여군에서 유의성 있게 낮았다. 혈청 총콜레스테롤 농도는 대조군에 비해 전실험군에서 유의성 있게 낮았으며, 특히 유도체화 처리한 옥수수유 및 들깨유 급여군에서 더욱 낮았다. HDL-콜레스테롤 농도는 대조군에 비해 전실험군에서 유의적으로 높았다. 혈청 LDL 및 LDL-콜레스테롤 농도는 대조군에 비해 전실험군에서 유의성 있게 낮았으며 유도체화 처리한 옥수수유 및 들깨유 급여군에서 더욱 낮은 경향을 보였고, 특히 유도체화 처리한 들깨유 급여군에서 가장 낮았다. VLDL 농도는 대조군에 비해 전실험군에서 유의성 있게 낮았으며, chylomicron 농도는 유도체화 처리한 유지 급여군에서 유의성 있게 낮았고 특히 유도체화 처리한 들깨유 급여군에서 가장 낮았다. 혈청 유리콜레스테롤 농도는 대조군에 비해 전 실험군간에 유의적인 차이는 없는 반면 유도체화 처리한 옥수수유 및 들깨유 급여군에서 약간 낮았다. 혈청 중성지질 농도는 대조군에 비해 전실험군에서 유의성 있게 낮았으며, 특히 유도체화 처리한 들깨유 급여군에서 가장 낮았다. 인지질 농도는 옥수수유 급여군이 대조군에 비해 약간 높게 나타난 반면 유도체화 처리한 유지 급여군은 약간 낮은 수준이었다. 이상의 결과 n-6계 linoleic acid의 함량이 높은 옥수수유 및 n-3계 linolenic acid 함량이 높은 들깨유의 공역이중결합유도체의 섭취는 혈중 총콜레스테롤, LDL-콜레스테롤, chylomicron 및 중성지질 농도를 감소시킴으로써 혈청 지질 개선효과가 있는 것으로 나타났으며, 특히 n-3계 들깨유의 공역이중결합 유도체 급여군이 혈청 지질 개선효과가 가장 큰 것으로 나타났다. This study was designed to examine the effects of n-6 PUFA rich corn oil, n-3 PUFA rich perilla oil and their conjugated double bond derivatives on serum lipids status in rats. Experimental diets containing lard (control), corn oil (CO), perilla oil (PO), conjugated double bond derivatives of n-6 PUFA rich corn oil (TCO) and n-3 PUFA rich perilla oil (TPO) at the level of 10% (w/w) were fed to male Sprague Dawley rats for 4 weeks. TCO was found to have three derivatives of linoleic acid and TPO had five derivatives of linolenic acid by GC. Serum total cholesterol levels were significantly lower in the all experimental groups than in the control group, and particularly, the lowest in TCO and TPO groups. HDL-cholesterol concentrations were a little higher in the all experimental groups than in the control group, and TCO and TPO groups were not significantly different from CO and PO groups. Serum LDL, LDL-cholesterol, chylomicron and triglyceride concentrations were significantly lower in the all experimental groups than in the control group, remarkably lower in TCO group and particularly, the lowest in the TPO group. Serum free cholesterol and cholesteryl ester concentrations were lower in TCO and TPO groups than in CO and PO groups. From the above research, TCO and TPO groups were effective on the improvement of the lipid compositions in serum and particularly, TPO group was the most effective on the improvement of serum lipids.

진료를 받는 고혈압 환자의 혈압 조절과 관련된 의사 요인

김소영,조인숙,이재호,김지현,이은정,박종혁,이진석,김윤,Kim, So-Young,Cho, In-Sook,Lee, Jae-Ho,Kim, Ji-Hyun,Lee, Eun-Jung,Park, Jong-Hyock,Lee, Jin-Seok,Kim, Yoon 대한예방의학회 2007 예방의학회지 Vol.40 No.6

Objectives : Little is known about the physician-related factors that are associated with the management of Hypertension. The purpose of this study was to determine the physician-related factors associated with blood pressure control in hypertensive patients. Methods : We surveyed 154 physicians at 117 public health (subhealth) centers in Gyeonggi-do, Forty-one physicians completed the survey (response rates : 26.6%) and 31 physicians were finally included as the study subjects. Using the information obtained from the self-reported survey, we measured the physician-related factors associated with hypertension control, including their perception of hypertension, prescription patterns (combination prescription rates, specific antihypertensives prescription rates among patients with diabetes mellitus), and sociodemographic factors. We then collected data on blood pressure and medication use in patients seen by these physicians from the health center#s information system. We compared the physicians# perceived hypertension control rates with the actual rates, and then evaluated the rate of high overestimation (overestimation by more than 25% of the median degree of hypertension control rate overestimation) among the physicians. The physicians# antihypertensive prescription patterns were also evaluated. Multiple logistic regression analysis was used to evaluate the independent association between hypertension control and physician-related factors. Results : The physicians tended to overestimate the proportion of their patients with controlled blood pressure (79.5% perceived vs. 57.8% actual). The percentage of physicians with high overestimation was 35.5% (11 physicians). The physicians with lower control rates were more likely to highly overestimate their patients# control rates. Physicians with below-median actual control rates tended to prescribe fewer combination treatments for patients with uncontrolled blood pressure and angiotensin-converting enzyme inhibitors or fewer angiotensin receptor blockers for patients with diabetes mellitus. The rate of high overestimation by physicians was 1.31 times higher in patients with uncontrolled blood pressure than in patients with other conditions (OR=1.31, 95% CI : 1.17-1.48). Conclusions : Physicians have a tendency to overestimate the rates of hypertension control in their patients. Because physicians have a direct role in treatment outcomes, physicians# overestimation about hypertension management contributes to inadequate blood pressure control. Thus, interventions for improving physician# awareness regarding the management of patients with hypertension are needed.

18세 이하 자녀를 둔 아버지의 가족식사시간과 생활만족도

김소영,Kim, Soyoung 대한가정학회 2017 Human Ecology Research(HER) Vol.55 No.5

This study examined the relationship between family meal time and emotional well-being for 5,186 fathers who were employed and had at least one child aged under 18 for the years 2009 and 2014 by analyzing their time diaries. In doing so, changes in time spent by fathers on family meals between 2009 and 2014 were also examined along with the factors associated with the amount of meal time for each year in order to understand ways to increase paternal participation in family meals. Analytic results showed that a father's family meal time had a positive association with his time use and life satisfaction; however, fathers who spent more than 40 minutes a day having meals with the family reported the highest score in time use and life satisfaction. The amount of time fathers spent on family meals increased from 38 minutes in 2009 to 43 minutes in 2014, whose change turned out to be mainly attributable to something more than the compositional change in the population between the two years, such as growing public awareness or cultural acceptance of the value of family meal. Fathers in dual-earner households tend to have longer family meal times; however, different factors were associated with their family meal times in 2009 and 2014. Policy implications are discussed in light of the government-initiated dining table education campaign to increase family meal time for the sake of children's character education at home.

Financial Panic and Exchange Rate Overshooting during Currency Crises

김소영,Sunghyun Henry Kim 한국국제경제학회 2007 International Economic Journal Vol.21 No.1

During currency crises, some currencies depreciate more than the post-crisis exchange rate level, which can be described as exchange rate overshooting. Previous studies have claimed that a tight monetary policy, represented by an increase in the interest rate, stabilizes an exchange rate by causing currency appreciation, thereby explaining overshooting. This paper tests the hypothesis that overshooting simply reflects the overreaction of investors due to financial panic during currency crises, regardless of subsequent domestic policies. Empirical results suggest that: (1) the positive relationship between monetary tightening and the overshooting measure is very sensitive to sample selection; and (2) the measure of financial panic has a significant and positive relationship with the measure of overshooting in non-European countries.

남매에서 비슷한 시기에 발생한 Henoch-$Sch{\ddot{o}}nlein$ 자반증 2례

김소영,임인석,유병훈,Kim, So-Young,Lim, In-Seok,Yoo, Byoung-Hoon 대한소아신장학회 2000 Childhood kidney diseases Vol.4 No.2

저자들은 남매에서 3주 정도의 차이를 둔 비슷한 시기에 피부의 자반성 구진, 관절의 부종 및 관절통을 주소로 내원하여 HS 자반증으로 진단받은 두명의 환아를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Henoch-$Sch{\ddot{o}}nlein$ purpura(HSP) frequently follows upper respiratory infection, and one of the causes of this discase is inferred to $\beta$-hemolytic streptococcal infection, but the relationship is still unclear. familial tendency of this disease is unclear, too. Also genetic relationship of this disease has been in a controversy yet. We experienced two cases of HSP in brother and sister at similar period, and report this case with review of related literatures.

선천 수정체이탈 소아에서 수정체적출술의 장기 결과

김소영,김성준,유영석,So Young Kim,Seong Jun Kim,Young Suk Yu 대한안과학회 2005 대한안과학회지 Vol.46 No.2

Purpose: To analyze the clinical features and the long term visual results of children with ectopia lentis after lensectomy. Methods: Enrolled in this study were 79 eyes of 43 patients who were operated on and followed up for at least 3 years. We performed a retrospective analysis of the patient records. Results: The mean age at diagnosis was 4.6 years, mean age at surgery was 5.7 years and average follow-up was 7.1 years. Of the 43 patients with bilateral ectopia lentis, 7 underwent monocular surgery. The mean age at diagnosis was higher and mean postoperative BCVA was significantly lower in the monocular surgery group than in the binocular surgery group. All eyes showed reduced hyperopia for 5 years postoperatively, but the reduction rate of the monocular operated eyes was significantly lower than that of the binocular operated eyes (P<0.05). No complication occurred during surgery and 1 eye (1.3%) with Marfan syndrome showed retinal detachment 9 years after surgery. Conclusions: Surgical treatment of ectopia lentis was safe and showed good visual outcomes after 7.1 years of follow-up. Nevertheless, consideration must be given to the possibility of amblyopia due to the difference of the degree of dislocation between the two eyes.

박태기나무의 잎으로부터 피부멜라닌 색소생성 억제성분의 분리

김소영,김진준,장태수,정시련,이승호,Kim, So-Young,Kim, Jin-Joon,Jang, Tae-Soo,Chung, See-Ryun,Lee, Seung-Ho 한국생약학회 1999 생약학회지 Vol.30 No.4

Tyrosinase plays an important role in the process of melanin polymer biosynthesis. Therefore, the enzyme inhibitors have been of great concern as cosmetics to have skin-whitening effects on the local hyperpigmentation. During the search for new inhibitory compounds on melanin polymer biosynthesis from natural sources, MeOH extracts of 589 higher plants were tested for the inhibitory effect on tyrosinase activity by the muschroom tyrosinase assay in vitro. Among plants tested, the leaves of Cercis chinensis exhibited potent inhibitory effect on mushroom tyrosinase activity. Subsequently seven active compounds were isolated from the ethyl acetate soluble part of acetone extract of the leaves of C. chinensis by the activity guided fractionation monitoring the inhibitory effect on tyrosinase activity. Their chemical structures were identified as $kaempferol-3-0-{\alpha}-L-rhamnoside$, quercitrin, $myricetin-3-0-{\alpha}-L-rhamnoside$, myricetin-3-0-(2'-O-galloyl)- ${\alpha}$ -L-rhamopyranoside (desmanthin), (-)-epicatechin-3-0-gallate, (-)-epigallocatechin-3-0-gallate, and methyl gallate on the basis of the speculation of spectral data and chemical reaction. Among the flavonol rhamnosides, myricetin-3-0-(2'-O-galloyl)- -L-rhamnoside(desmanthin) showed most potent inhibitory effect on tyrosinase activity and the structure of B-ring in flavonol moiety was related to the activity. (-)-Epigallocatechin-3-O-gallate having pyrogallol group in flavan-3-ol moiety exhibited more potent inhibitory effect than (-)-epicatechin-3-0-gallate having catechol group in flavan-3-ol moiety on mushroom tyrosinase activity.

빈랑자(Arecae Semen)로부터 arecoline의 분리 및 함량분석

김소영,손건호,강신정,장승엽,박정일,이경순,이승호,Kim, So-Young,Son, Kun-Ho,Kang, Shin-Jung,Chang, Seung-Yeup,Park, Jeong-Hill,Lee, Kyong-Soon,Lee, Seung-Ho 한국생약학회 2001 생약학회지 Vol.32 No.1

The seeds of Areca catechu L. has been used for the treatment of the diseases caused by parasites in East Asia. As a part of a research for standardization of crude drugs, we have determined the content of arecoline in the seeds of Arecae Semen purchased from various regions of Korea. The HPLC method for quantitative analysis of arecoline in Arecae Semen was established and reproducible results and chromatographic isolation of arecoline was accomplished successively. It suggested that the content of arecoline in Arecae Semen was $0.2726\;{\pm}\;0.05532%$.