In-line 마그네트론 스퍼터 장치를 사용하여 산소 분위기에서 제작한 Ag 박막의 특성

구대영,김원목,조상무,황만수,이인규,정병기,이택성,이경석,조성훈,Ku, Dae-Young,Kim, Won-Mok,Cho, Sang-Moo,Hwang, Man-Soo,Lee, In-Kyu,Cheong, Byung-Ki,Lee, Taek-Sung,Lee, Kyeong-Seok,Cho, Sung-Hun 한국재료학회 2002 한국재료학회지 Vol.12 No.8

A study was made to examine the electrical, compositional, structural and morphological properties of Ag thin films deposited by DC magnetron sputtering in $O_2$ atmosphere with deposition temperature from room temperature to 15$0^{\circ}C$ using in-line sputter system. The Ag films deposited at temperature above $100^{\circ}C$ in oxygen atmosphere gave a similar specific resistivity to and even lower oxygen content than those deposited using pure Ar sputter gas The Ag films deposited with pure Ar gas was mainly composed of crystallites with [111] preferred orientation, while, for those deposited in oxygen atmosphere, more than 50% of the volume was composed of crystallites with [100] orientation. The difference in the micro structure did not cause any difference in the specific resistivity of Ag films. The results showed that the transparent conducting oxide films and the Ag films could be processed sequentially in the same deposition chamber with careful control of deposition temperature, which might result in a cost reduction for constructing the large scale in-line deposition system.

충격하중을 받는 Al 박육부재의 에너지흡수 제어특성

양용준,황우채,서현경,김정호,심재기,양인영 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-

In this study, concerns the crashworthiness of the widely used vehicle structure, square thin-walled tubes, which are excellent on the point of the energy absorbing capacity. An experimental investigation was carried out to study the energy absorption characteristics of thin-walled square tubes subjected to dynamic crushing by axial loading to develop the optimum structural members. The impact velocity was tested in the rage 4.698~8.2m/s. To efficiently review the collapse characteristics of these sections, the simulation have been carried out using explicit FEM package, LS-DYNA. The solutions compared with results the impact collapse experiment. Here, the controller are introduced to improve and control the absorbed energy of thin-walled square tubes in this paper. To predict and control the energy absorption, we designed it in consideration to the it's influence, height, thickness, wide ratio in this study. When the controller used, the experimental results of crushing of square tubes controlled by the controller's elements showed a good candidate for a controllable energy absorption capability in impact axial crushing.

장내의 탄수화물과 지방 흡수 억제를 통한 체지방 및 비만 개선 효과에 관한 연구

정은희,윤승원,이홍석,윤유식,유경미,황인경 한국조리과학회 2003 한국식품조리과학회지 Vol.19 No.1

In a previous study, a dietary supplement was developed in our lab using natural herbal extracts against digest enzyme activity in GI tract for weight control. This natural herbal extracts could regulate absorption of glucose and lipid by the inhibition of digest enzyme activity. In this study, we screened the natural herbs that inhibit glucoamylase activity and developed an water extract of cinnamon. The cinnamon extract delayed and decreased the increment of carbohydrate degradation through the inhibition of glucoamylase activity in vitro. Fifty volunteers were subjected to the intake of the herbal extracts by taking twice a day for 60 days. As a result, the treated subjects lost 3kg of body weight and 3.5kg of body fat mass after the treatment. Furthermore, the body mass index and waist size were significantly decreased during the experimental period. Above results suggested that the administration of the dietary additives composed of cinnamon and natural herbal extract improves the obesity by the decrement of body weight and body fat mass.

The Implication of Cardiac Injury Score on In-hospital Mortality of Coronavirus Disease 2019

Kim In-Cheol,Song Jin Eun,Lee Hee Jung,Park Jeong-Ho,Hyun Miri,Lee Ji Yeon,Kim Hyun Ah,Kwon Yong Shik,Park Jae Seok,윤종찬,Hwang Jongmin,Lee Cheol Hyun,Cho Yun-Kyeong,Park Hyoung-Seob,Yoon Hyuck-Jun,Nam 대한의학회 2020 Journal of Korean medical science Vol.35 No.39

Backgrounds: The severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2) has spread worldwide. Cardiac injury after SARS-CoV-2 infection is a major concern. The present study investigated impact of the biomarkers indicating cardiac injury in coronavirus disease 2019 (COVID-19) on patients' outcomes. Methods: This study enrolled patients who were confirmed to have COVID-19 and admitted at a tertiary university referral hospital between February 19, 2020 and March 15, 2020. Cardiac injury was defined as an abnormality in one of the following result markers: 1) myocardial damage marker (creatine kinase-MB or troponin-I), 2) heart failure marker (N-terminal-pro B-type natriuretic peptide), and 3) electrical abnormality marker (electrocardiography). The relationship between each cardiac injury marker and mortality was evaluated. Survival analysis of mortality according to the scoring by numbers of cardiac injury markers was also performed. Results: A total of 38 patients with COVID-19 were enrolled. Twenty-two patients (57.9%) had at least one of cardiac injury markers. The patients with cardiac injuries were older (69.6 ± 14.9 vs. 58.6 ± 13.9 years old, P = 0.026), and were more male (59.1% vs. 18.8%, P = 0.013). They showed lower initial oxygen saturation (92.8 vs. 97.1%, P = 0.002) and a trend toward higher mortality (27.3 vs. 6.3%, P = 0.099). The increased number of cardiac injury markers was significantly related to a higher incidence of in-hospital mortality which was also evidenced by Kaplan-Meier survival analysis (P = 0.008). Conclusion: The increased number of cardiac injury markers is related to in-hospital mortality in patients with COVID-19.

Enhanced activation of NAD(P)H: quinone oxidoreductase 1 attenuates spontaneous hypertension by improvement of endothelial nitric oxide synthase coupling via tumor suppressor kinase liver kinase B1/adenosine 5&vprime;-monophosphate-activated protein kina

Kim, Yong-Hoon,Hwang, Jung Hwan,Kim, Kyung-Shim,Noh, Jung-Ran,Gang, Gil-Tae,Oh, Won Keun,Jeong, Kyeong-Hoon,Kwak, Tae Hwan,Choi, Hueng-Sik,Lee, In-Kyu,Lee, Chul-Ho Wolters Kluwer Health | Lippincott Williams Wilkin 2014 Journal of Hypertension Vol.32 No.2

AIMS:: Guanosine 5&vprime;-triphosphate cyclohydrolase-1 (GTPCH-1) is a rate-limiting enzyme in de-novo synthesis of tetrahydrobiopterin (BH4), an essential cofactor for endothelial nitric oxide synthase (eNOS) coupling. Adenosine 5&vprime;-monophosphate-activated protein kinase (AMPK) is crucial for GTPCH-1 preservation, and tumor suppressor kinase liver kinase B1 (LKB1), an upstream kinase of AMPK, is activated by NAD-dependent class III histone deacetylase sirtuin 1 (SIRT1)-mediated deacetylation. &bgr;-Lapachone has been shown to increase cellular NAD/NADH ratio via NAD(P)H:quinone oxidoreductase 1 (NQO1) activation. In this study, we have evaluated whether &bgr;-lapachone-induced NQO1 activation modulates blood pressure (BP) through preservation of GTPCH-1 in a hypertensive animal model. METHODS AND RESULTS:: Spontaneously hypertensive rats (SHRs), primary aortic endothelial cells, and endothelial cell line were used to investigate the hypotensive effect of &bgr;-lapachone and its action mechanism. &bgr;-Lapachone treatment dramatically lowered BP and vascular tension in SHRs and induced eNOS activation in endothelial cells. Consistent with these effects, &bgr;-lapachone treatment also elevated levels of both aortic cGMP and plasma nitric oxide in SHRs. Meanwhile, &bgr;-lapachone-treated SHRs showed significantly increased levels of aortic NAD, LKB1 deacetylation, and AMPK Thr phosphorylation followed by increased GTPCH-1 and tetrahydrobiopterin/dihydrobiopterin ratio. In-vitro study revealed that AMPK inhibition by overexpression of dominant-negative AMPK nearly abolished GTPCH-1 protein conservation. Enhanced LKB1 deacetylation and AMPK activation were also elicited by &bgr;-lapachone in endothelial cells. However, inhibition of LKB1 deacetylation by blocking of NQO1 or SIRT1 blunted AMPK activation by &bgr;-lapachone. CONCLUSION:: This is the first study demonstrating that eNOS coupling can be regulated by NQO1 activation via LKB1/AMPK/GTPCH-1 modulation, which is possibly correlated with relieving hypertension. These findings provide strong evidence to suggest that NQO1 might be a new therapeutic target for hypertension.

청량음료용 고강도 감미료의 혼용 비율에 따른 관능적 특성 및 저장기간 산정

최선영,장은경,황인경 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.2

This study investigated the sensory characteristics of mixtures of high-intensity sweeteners for beverage and estiniated the shelf life during storage. Sensory characteristics of mixtures of sweeteners (Aspartame/Acesulfarne-K, Aspartame/Sucralose and Acesulfame-K/Stevioside) were evaluated in aqueous (ranging from 90:10 to 50:50) and citrate buffer (ranging from 90:10 to 50:50) solutions, Significant synergistic effects were found in Aspartame/Acesulfarue-K and Aspartame/Sucralose mixtures. No significant differences were found in other taste attributes (astringency, bitterness, metallic taste etc.). Aspartame/Acesulfame-K 5:5 solution showed the most acceptable sensory attributes. Q_(10) values of Aspartame and Accsulfamc-K mixture in citrate buffer (ranging from 90:10 to 50:50) solution were calculated from the temperature data (between 40℃ and 50℃ ) determined by HPLC. Q_(10) values were in the range of 2.01-2.25. Their shelf lives were calculated to be lengthened with increasing Acesulfame-K mixture ratio Their shelf lives in Aspartame/Acesulfame-K 5:5 citrate buffer solution estimated at 20℃ and 30℃ were 178 days and 88 days, respectively.

민들레 추출액 농도에 따른 민들레 코팅쌀밥의 품질에 관한 연구

유경미,이연경,김세희,황인경,이부용,김성수,홍희도,김영찬 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.1

Washed rice was coated by spraying aqueous dandelion (Taraxacum officinale) extracts at 20, 30, 40 'Brix and dried at room temperature. The coating procedure was conducted 5 mL/min for 10min. Property changes in the dandelion coated rice and un-coated cooked rice were observed during 2 days of storage. Increasing the coating concentration was associated with lower color values (L, a value) and moisture contents. Sensory and texture properties generally decreased in the cooked rice coated with dandelion more than the control (non-coated rice). But, D-20(20 °Brix of the dandelion concentration) resulted in better textural properties and s ensnry scores for hardness and overall acceptability in cooked rice. Compared to the control, the washed rice roated with 20 °Brix for 0 and 2 days showed better quality in sensory activities, a lower gel consistency and better textural activities. It was concluded that the optimum coating ration of rice and added dandelion extract for cooking were 20 °Brix and 5% respectively, in proportion to the total weight of raw rice.

경량화 구조부재의 압궤특성에 대한 실험적 연구

황우채,김정호,서현경,양인영 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.1

자동차를 설계하는 가장 중요한 목적은 현제 환경 친화적인 면과 안전수행 측면에 초점이 맞춰져있다. 경량화 자동차 생산의 전반적인 움직임에 있다 환경친화적인 면과 경제적 측면 때문에 자동차생산에서 경량화에 초점이 맞춰져 있다. 본 연구에서는 사각 단면의 압궤 특성을 고려하여 모자형 단면 부재의 에너지흡수와 압궤특성을 분석하였다. 축 정적 압궤테 스트가 각각의 시험편에 대해여 행하여졌다 각각의 부재들의 에너지홉수와 압궤 모드가 분석되었다. 시험편은 알루미늄 사각부재,CFRP 사각부재,Hybrid 사각부재,CFRP 모자형 단면 부재와 Hybrid 모자형 단면 부재가 사용 되었다. 경량화 측면에서 각각의 부재들의 에너지흡수와 압궤특성이 비교 분석 되었다. The most important purpose in designing automobile is currently focus on environment-friendly, safety performance aspect. As for the environment-friendly and economical aspect, the Issues are the overall movements toward lightweight automobile production. In this study ,based on the collapse characteristics of square section member, the collapse characteristics and energy absorption capability of hat-shaped section members were analyzed. The axial static collapse tests were performed for each section members. The collapse modes and the energy absorption capability of the each section member were analyzed. The square sectional members which were composed of the aluminum. CFRP and hybrid were used and hat-shaped sectional members which were composed of the CFRP, hybrid were used by the specimens. In the lightweight design aspect, the collapse characteristics and energy absorption capability of the each member were compared and they were analyzed.

민들레 잎과 뿌리 분말을 첨가한 설기떡의 품질 특성

유경미,김세희,장정화,황인경,김경임,김성수,김영찬 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.1

In order to develop a dandelion (Taraxacum officinale) with natural food applications, the effects of dandelion leaves and roots powder content on the physical, textural and sensory properties of sulggidduk were examined. Dandelion powders of leaves and roots at 0, 1, 2 and 3% were added to the dandelion sulgidduk. In the dandelion roots powder in sulgidduk, the color intensity of L values and the values and moisture content decreased however, the sensory color intensity, dandelion flavor and overall acceptability increased with increasing the dandelion powder content. The sensory overall acceptability indicated the dandelion roots powder content at 3% had the highest overall and flavor scores. As the dandelion leaves content was increased, the moisture contents, lightness, adhesiveness and cohesiveness of sulggidduk decreased, while the sensory color intensity, sensory hardness, hardness of texture properties and dandelion flavor increased. The addition at 1% of the dandelion leaves powder content with the dandelion sulggidduk and the addition at 3% of the dandelion roots powder content with the dandelion sulggidduk showed the highest overall acceptability.

교통사고 상해 증후군의 한의 임상진료 현황 조사: 2차 온라인 심층 설문 조사

임경태 ( Kyeong-tae Lim ),황의형 ( Eui-hyoung Hwang ),황만석 ( Man-suk Hwang ),박인화 ( In-hwa Park ),박선영 ( Sun-young Park ),신병철 ( Byung-cheul Shin ) 한방재활의학과학회 2018 한방재활의학과학회지 Vol.28 No.4

Objectives To understand current status of clinical practice patterns on Korean Medicine treatment practice of traffic injury patients by 2nd on-line survey for developing Korean Medicine treatment clinical pratice guideline (CPG) for traffic injuries. Methods A revised questionnaire about current practice patterns of Korean Medicine treatments for traffic injuries was distributed by e-mail survey to 19,385 respondents of Korean Medicine doctors from May 21th in 2018 to June 21th in 2018. All data were statistically analysed. Results The response rate was 3.5%. Most of the respondents felt necessity of the development of Korean Medicine CPG for traffic injuries. The results showed the detailed usage and trend of current Korean Medicine treatment such as acupuncture, pharmacopuncture, moxibustion, Chuna manual therapy, cupping, Korean Medicine physiotherpy for traffic injury patients. Conclusions This survey helps to determine current Korea Medicine treatments' clinical practice patterns for traffic injury patients. All data from the survey will provide basic data for future clinical studies and adaptation for the revision of Korean Medicine CPG for traffic injuries. (J Korean Med Rehabil 2018;28(4):89-101)