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Yun Gyeong Hwang(황윤경),Jae Joon Lee(이재준),Ah Ra Kim(김아라),Myung Yul Lee(이명렬) 한국생명과학회 2010 생명과학회지 Vol.20 No.11
비파잎의 생리활성 기능과 이용 가능성에 관한 연구의 일환으로 비파잎의 영양성분 및 생리활성 효능을 검증하여 측정한 결과는 다음과 같다. 비파잎의 일반성분은 건량 기준(dry basis)으로 수분 함량 5.78%, 조단백질 6.74%, 조지방 7.87%, 조회분 6.99%, 식이섬유소 43.61%, 탄수화물 29.01%를 함유하였다. 비파잎의 구성당은 총4종 검출되었으며 이중 rhamnose가 3,391.84 ㎎/l로 제일 많이 검출되었으며, galactose 663.27 ㎎/l, glucose 651.65 ㎎/l, lactose 662.40 ㎎/l 검출되었다. 비파잎의 유리 아미노산은 glutamic acid 함량이 11.30 ㎎%로 가장 높았으며, asparagine 9.02 ㎎%, γ-amino-n-butyric acid 8.30 ㎎%, alanine 4.53 ㎎%, phosphoserine 3.77 ㎎%, aspartic acid 3.23 ㎎% 순으로 높게 나타났다. 구성 아미노산의 경우 histidine 함량이 501.26 ㎎%로 가장 높았으며, 총 아미노산에 대한 필수아미노산의 비율은 50.15%로 높게 차지하는 것으로 나타났다. 지방산 중 포화지방산은 stearic acid가 41.54%로 가장 많이 함유하고 있었으며, lauric acid 12.00%, myristic acid 11.13%, pentadecanoic acid 41.54% 순으로 검출되었다. 불포화지방산은 oleic acid 만 검출되었으며, 총 지방산 함량의 27.9%를 함유하고 있었다. 비타민 A는 0.039 ㎎%, 비타민 E는 0.096 ㎎%, 비타민 C는 0.575 ㎎%로 검출되었다. 무기질은 Ca 함량이 1,892.60 ㎎%, K 함량이 1,244.90 ㎎%로 많이 검출되었다. 다음으로 Mg, Na, Mn, Zn 순이었고, Cu 함량은 미량 함유하는 것으로 나타났다. 비파잎의 유기산은 succinic acid 함량이 24,343.57 ㎎/l로 가장 많았고, 다음으로 citric acid 2,964.87 ㎎/l, maleic acid 2538.59 ㎎/l 순으로 검출되었다. 비파잎 에탄올 추출물의 기능성을 측정한 결과 총 polyphenol 함량은 500 ppm에서 15.77 ㎎/ml, 1,000 ppm에서 32.32 ㎎/ml 함유하고 있는 것으로 나타나 1,000 ppm에서 약 2배 정도 높게 나타났다. 총 flavonoid 함량은 500 ppm에서 15.58 ㎎/ml, 1,000 ppm에서 28.65 ㎎/ml으로 나타났다. 비파잎의 DPPH radical 소거능은 500 ppm에서 68.26%, 1,000 ppm에서 80.53% 소거능을 보였으며, 이는 농도가 증가함에 따라 항산화 활성도 증가되는 것을 알 수 있었다. 특히 1,000 ppm에서 대조구인 500 ppm BHT 및 BHA와 비슷한 수준으로 높은 항산화 활성이 나타났다. 이상의 결과 비파잎은 필수아미노산 및 항산화 비타민, 무기질을 다량 함유하고 있으며 비파잎 에탄올 추출물은 항산화 활성 및 DPPH radical 소거능이 우수한 것으로 나타나 비파잎을 이용한 기능성 식품의 개발가치가 한층 더 높아질 것으로 기대되어 진다. This study was carried out to investigate the physicochemical compositions and antioxidative effects of Eriobotrya japonoca Lindl (Loquat). The proximate compositions of the loquat leaf on a dry matter basis were 8.78% moisture content, 6.74% crude protein, 7.87% crude fat, 6.99% crude ash, 43.61% dietary fiber and 26.01% carbohydrate. In analysis of free amino acids, 16 kinds total amino acid components, 17 kinds of components were isolated from loquat. The essential amino acids contained in loquat leaf accounted for 50.15% of total amino acids, while the non-essential amino acids accounted for 49.85%. In analysis of total fatty acids, only 5 kinds of acid were detected: lauric acid, myristic acid, pentadecanoic acid, stearic acid and oleic acid. The contents of vitamin A, vitamin E and vitamin C were 0.039 ㎎%, 0.096 ㎎% and 0.575 mg%, respectively. The mineral contents of loquat leaf were greater in order of Zn<Mn<Fe<Na<Mg<K<Ca. Organic acids including succinic acid, maleic acid and citric acid were detected. The major free sugars were identified as rhamose, galactose, glucose and lactose. Total polyphenol contents of loquat leaf ethanol extract were found to be 15.77 ㎎/ml in 500 ppm and 32.32 ㎎/ml in 1,000 ppm. Moreover, total flavonoid contents of loquat leaf ethanol extract were found to be 15.58 ㎎/ml in 500 ppm and 28.65 ㎎/ml in 1,000 ppm. The DPPH radical scavenging activity of loquat leaf ethanol extract in 1,000 ppm was high and similar to the BHA and BHT.
황윤경 ( Yun-gyeong Hwang ) 중앙대학교 예술문화연구원 2017 예술문화융합연구 Vol.6 No.-
The purpose of this study is to establish the direction and strategy of the space management through the master plan for the improvement projects of the villages which have been individually and sporadically promoted for Sucheongri in Gwangju city, to improve the value of local landscape and the quality of public space environment effectively, and ultimately to contribute to the improvement of the quality of life of local residents. As a result, we have established a master plan through resident workshop and landscape resource analysis centered on Seochungri area. The active introduction of the master plan and action plans and programs will be the foundation for the success of the village, but more importantly, it is the will of the people.
PncA 유전자의 염기 서열 결정에 의한 결핵균의 Pyrazinamide 내성 진단
황지윤 ( Hwang Ji Yun ),곽경록 ( Gwag Gyeong Log ),박혜경 ( Park Hye Gyeong ),이지석 ( Lee Ji Seog ),박삼석 ( Park Sam Seog ),김윤성 ( Kim Yun Seong ),이정유 ( Lee Jeong Yu ),장철훈 ( Jang Cheol Hun ),이민기 ( Lee Min Gi ),박순규 대한결핵 및 호흡기학회 2001 Tuberculosis and Respiratory Diseases Vol.50 No.1
ALI 배양법을 이용한 비강 점막 상피세포의 미세구조와 14C-mannitol 투과도
곽경록 ( Gwag Gyeong Log ),황지윤 ( Hwang Ji Yun ),이지석 ( Lee Ji Seog ),박혜경 ( Park Hye Gyeong ),김윤성 ( Kim Yun Seong ),이민기 ( Lee Min Gi ),박순규 ( Park Sun Gyu ),김유선 ( Kim Yu Seon ),노환중 ( No Hwan Jung ) 대한결핵 및 호흡기학회 2001 Tuberculosis and Respiratory Diseases Vol.50 No.2
A Comparative Theoretical Study of Au, Ag and Cu Adsorption on TiO2 (110) Rutile Surfaces
Gyeong S. Hwang,Devina Pillay,Yun Wang 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.2
The adsorption properties of Au, Ag and Cu on TiO2 (110) rutile surfaces are examined using density func-tional theory slab calculations within the generalized gradient approximation. We consider five and four diferent ad-sorption sites for the metal adsorption on the stoichiometric and reduced surfaces, respectively. The metal-oxidebonding mechanism and the reactivity of metal atoms are also discussed based on the analyses of local density of statesand charge density diferences. This study predicts that Au atoms prefer to adsorb at the fourfold holow site over thefivefold-coordinated Ti(5c) and in-plane and bridging O(2c) atoms with the adsorption energy of 0.6 eV. At this site, itappears that the covalent and ionic interactions with the Ti(5c) and the O(2c), respectively, contribute synergisticallyto the Au adsorption. At a neutral Fs0 center on the reduced surface, Au binds to the surface via a rather strong ionicinteraction with surounding sixfold-cordinated Ti(6c) atoms, and its binding energy is much larger than to the stoi-chiometric surface. On the other hand, Ag and Cu strongly interact with the surface bridging O(2c) atoms, and the sitebetween two bridging O(2c) atoms is predicted to be energeticaly the most favorable adsorption site. The adsorptionenergies of Ag and Cu at the B site are estimated to be 1.2 eV and 1.8 eV, respectively. Unlike Au, the interactionof Ag and Cu with a vacancy defect is much weaker than with the stoichiometric surface.
Effect of a Facial Muscle Exercise Device on Facial Rejuvenation
Hwang, Ui-jae,Kwon, Oh-yun,Jung, Sung-hoon,Ahn, Sun-hee,Gwak, Gyeong-tae Oxford University Press 2018 Aesthetic surgery journal Vol.38 No.5
<P><B>Abstract</B></P><P><B>Background</B></P><P>The efficacy of facial muscle exercises (FMEs) for facial rejuvenation is controversial. In the majority of previous studies, nonquantitative assessment tools were used to assess the benefits of FMEs.</P><P><B>Objectives</B></P><P>This study examined the effectiveness of FMEs using a Pao (MTG, Nagoya, Japan) device to quantify facial rejuvenation.</P><P><B>Methods</B></P><P>Fifty females were asked to perform FMEs using a Pao device for 30 seconds twice a day for 8 weeks. Facial muscle thickness and cross-sectional area were measured sonographically. Facial surface distance, surface area, and volumes were determined using a laser scanning system before and after FME. Facial muscle thickness, cross-sectional area, midfacial surface distances, jawline surface distance, and lower facial surface area and volume were compared bilaterally before and after FME using a paired Student <I>t</I> test.</P><P><B>Results</B></P><P>The cross-sectional areas of the zygomaticus major and digastric muscles increased significantly (right: <I>P</I> < 0.001, left: <I>P</I> = 0.015), while the midfacial surface distances in the middle (right: <I>P</I> = 0.005, left: <I>P</I> = 0.047) and lower (right: <I>P</I> = 0.028, left: <I>P</I> = 0.019) planes as well as the jawline surface distances (right: <I>P</I> = 0.004, left: <I>P</I> = 0.003) decreased significantly after FME using the Pao device. The lower facial surface areas (right: <I>P</I> = 0.005, left: <I>P</I> = 0.006) and volumes (right: <I>P</I> = 0.001, left: <I>P</I> = 0.002) were also significantly reduced after FME using the Pao device.</P><P><B>Conclusions</B></P><P>FME using the Pao device can increase facial muscle thickness and cross-sectional area, thus contributing to facial rejuvenation.</P><P><B>Level of Evidence: 4</B></P><P>[GRAPHIC OMISSION]</P>