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Monitoring of the Changjiang River Plume in the East China Sea using a Wave Glider
Moh, Taejun,Cho, Jin Hyung,Jung, Seom-Kyu,Kim, Sang-Hyun,Son, Young Baek BioOne (Coastal Education and Research Foundation) 2018 JOURNAL OF COASTAL RESEARCH Vol.85 No.special
<P>Most water from the Changjiang River discharges into the East China Sea (ECS), and affects the sea's oceanographic environment, even near Jeju Island, Korea. However, most research conducted using vessels, buoys, and satellite systems has a limited capacity for continuous direct measurement over a wide area. To overcome these spatial and temporal limitations, an autonomous wave-powered glider equipped with a fluorometer, a conductivity-temperature depth, and an acoustic Doppler current profiler was deployed. Over 34 days from August 19 to September 22 in 2016, the wave glider navigated 985 km in the ECS near Jeju Island, and sensed 34,500 continuous water columns every minute. The glider transmitted the data via the Iridium satellite communication system, even under severe weather conditions. The wave glider detected low salinity and high turbidity of the surface water southwest of Jeju Island. Comparison of the surface turbidity and back-scattered echo intensity revealed that the surface turbid water migrated from west to south of Jeju Island. It descended slightly through chaning of the mixed layer depth. The observations from this study suggest that wave gliders can provide reliable sensing and maneuvering capabilities for monitoring of the Changjiang River plume in the ECS.</P>
직류전류 인가를 통한 김으로부터 포피라334의 대량 정제 고도화
장성주(Sung Joo Jang),이정훈(Jeong Hun Lee),서효현(Hyo Hyun Seo),이삭(Sak Lee),김지연(Jiyeon Kim),김도연(Doyoun Kim),모상현(Sang Hyun Moh) 한국해양바이오학회 2020 한국해양바이오학회지 Vol.12 No.1
Marine algae contain a variety of substances, such as mycosporine-like amino acids, which can defend against UV irradiation. Among them, Porphyra-334 derived from Porphyra yezoensis is attracting attention as a novel active ingredient for anti-aging cosmetics because of its excellent anti-oxidative, anti-inflammatory, and wound-healing properties through promoting skin cell migration. In this study, a process using direct current (DC) for increasing the yield of large-scale purification of Porphyra-334 was developed. When DC was applied to obtain Porphyra-334 efficiently, the purification time was shortened by approximately 1/4 compared with the process wherein DC was not applied; moreover, the yield of purification was improved.
Suh, Sung-Suk,Park, Mirye,Hwang, Jinik,Lee, Sukchan,Moh, Sang Hyun,Park, Ki Hwan,Lee, Taek-Kyun 한국해양학회 2014 Ocean science journal Vol.49 No.3
Understanding the patterns of microbial diversity and their composition in seawater is necessary to assess the impacts of microbes on marine ecosystem. Although the potential roles of microbes in the ocean have been studied, their diversity and relationship with environmental factors remain unclear. In this study, we adopted a 16S rRNA gene tag-pyrosequencing technique to investigate the bacterial communities associated with two different water masses from Tongyoung in the South Sea of Korea. Our results revealed highly diverse bacterial communities up to 900 Operational Taxonomic Units (OTUs) estimated from each seawater which was collected in the month of March and May, when the environmental conditions including temperature differed significantly: $7.2^{\circ}C$ and $17.6^{\circ}C$ in March and May, respectively. Altogether, 13 bacterial phyla were recovered from the seawater, of which Proteobacteria was the most dominant group. In addition, the value of the Shannon index, which measures the evenness of the distribution of individuals among OTUs, in May is higher than that in March, indicating that it displays a wider diversity of bacteria. Interestingly, the proportion of pathogenic bacteria was significantly increased in the month of May compared to March, suggesting that pathogenic bacteria were increasingly emerging in May. In particular, Pseudoalteromonas and Vibrio spp. were determined as major pathogenic bacteria from both water masses, of which Vibrio spp. were dominant.
고삼뿌리 추출물 내 Kurarinone, Oxymatrine, Matrine 분석 방법 검증
장성주(Sung-Joo Jang),이삭(Sak Lee),이정훈(Jeong-Hun Lee),모상현(Sang-Hyun Moh) 한국화장품미용학회 2020 한국화장품미용학회지 Vol.10 No.1
The root of the Sophora flavescens with excellent pharmacological efficacy has been used as a herbal medicine. The test was carried out to verify the analysis of kurarinone, oxymatrine and matrine in the root extract of the Sophora flavescens using HPLC. As a result of confirming the MS/MS by fractionation, it was confirmed that the corresponding peaks were kurarinone, oxymatrine, and matrine, respectively, as the MS/MS spectrum was consistent. As a result of confirming the accuracy test and reproducibility, and the precision within and between batches, it was possible to confirm high accuracy and precision. As a result of confirming the stability of the pre-treated sample, all three materials were stable for 48 hours. In conclusion, it was evaluated and established that the method validation for kurarinone, oxymatrine and matrine in the range with the specificity, linearity, accuracy, precision, and stability.
미세조류 추출물 및 MAAs 함유 자외선차단제의 자외선차단지수(SPF) 및 자외선 A 차단지수(PFA) 평가
모상현(Moh, Sang-Hyun),서승석(Suh, Sung-Suk),조문진(Cho, Moon Jin),송미영(Song, Mi Young),황진익(Hwang, Jin-Ik),박미례(Park, Mirye),이택견(Lee, Taek-Kyun) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.5
천연물 유래 자외선차단제 개발을 위해 미세조류 추출물 및 mycosporine-likeaminoacids(MAAs)의 활용가능성을 연구하였다.Chlamycomonashedleyi추출물과 추출물 분획물인 MAAs가 각각 7% 포함된 자외선차단크림을 제조하고 인체 적용시험을 실시하였다.이를 통하여 자외선차단지수(SPF)및 자외선 A차단지수(PFA)를 평가하였다.Ch.hedleyi추출물과 MAAs함유 자외선 차단 크림의 자외선 차단지수는 각각 9.07및 9.42로 나타났으며,자외선 A차단지수는 각각 2.43과 2.41 로 측정되었다.자외선 A차단지수가 모두 2 상으로 측정되어 두가지 자외선 차단크림의 자외선 A차단등급은 [PA+]으로 분류되었다.이상의 연구결과는 미세조류 추출물 및 MAAs함유 자외선차단제가 자외선을 효과적으로 막지 못하지만,무기 자외선 차단제가 혼합되면 만족할만한 자외선 차단효과를 보일 수 있을 것으로 판단된다. For the sunscreen development from natural resources, a possible usage of microalgal extracts or mycosporine-like amino acids (MAAs) was investigated. Sunscreens containing 7% of microalgal extracts or MAAs derived from microalgae, Chlamydomonas hedleyi, were prepared and they were applied to human research. Through this clinical research, the values of Sun Protection Factors, Sun Protector Factor (SPF) and Protection Factor of UVA (PFA), of sunscreen containing microalgal extracts or MAAs were determined: SPF values of microalgal extracts and MAAs indicated 9.07 and 9.42, respectively, while PFA ones did 2.43 and 2.41. Due to more than 2 of PFA value in both sunscreens, they can be classified into [PA+]. Taken together, although sunscreen containing microalgae-derived extracts or MAAs does not effectively protect UV irradiation, its capacity can be satisfied if inorganic UV-protecting compounds are added.
모상현(Sang-Hyun Moh),이정훈(Jeong-Hun Lee),김형식(Hyoung-Shik Kim),여진희(Jin-Hui Yeo) 한국화장품미용학회 2015 한국화장품미용학회지 Vol.5 No.3
As natural plant-based industry has been expanded, the use of oriental medicinal plants as cosmeceutical material was received a lot of attentions in the cosmetic industry. Among various medicinal plants, Potentilla chinensis have been interested in its biological effects. Although several attempts were tried to study its biological effect as medicinal plant, only limited studies tried to evaluate its biological effect as cosmeceutical material. In this study, we examined the possibility of Potentilla chinensis extract as a cosmeceutical material. After extraction of Potentilla chinensis, biological evaluation including anti-inflammation, anti-wrinkle, whitening effect and moisturizing effect was performed as cosmeceutical material. As a result, the Potentilla chinensis extract showed remarkable biological activities through stimulating elastin and aquaporin-3, and inhibiting melanin synthesis, cyclooxygenase-2 expression and expression of metallopeptidase-1, respectively. These results show the potential use of Potentilla chinensis as a functional cosmetic material for anti-inflammatory, wrinkle improvement, skin hydration and whitening effects.
모상현(Sang Hyun Moh),정대현(Dai Hyun Jung),김형식(Hyoung Shik Kim),조문진(Moon Jin Cho),서효현(Hyo Hyun Seo),김성준(Sung Jun Kim) 한국생물공학회 2011 KSBB Journal Vol.26 No.6
Bioactive peptides (BAP) showed excellent cosmetic activity than bio-materials such as caffeic acid (CA), gallic acid (GA), and nicotinic acid (NA). Caffeoyl tripeptide-1 (CT-1) is a BAP that is stabilized with Gly-His-Lys (GHK) tripeptide and CA by using Fmoc solid phase peptide synthesis. Digalloyl tetrapeptide-19 (DT-19) is stabilized by combining Lys-Glu-Cys-Gly with GA and nicotinoyl tripeptide-1 (NT-1) is synthesized by GHK and NA. According to experiments, CT-1 has an excellent anti-oxidant function even with a very small amount of 10 ppm CT-1. DT-19’s tyrosinase inhibition activity has the better effect of about 28.57% in 0.01% and 33.33% in 0.005% of concentration and about 7.89% in 0.001% concentration than vitamin-C. In addition, NT-1 is safer than the NA. Almost BAPs like pal-KTTKS, acetyl hexapeptide, and copper tripeptide-1 have the anti-wrinkle effect while DT-19 and NT-1 are applicable for potential BAPs focused on the whitening effect. The three kinds of BAPs like CT-1, DT-19, and NT-1 consisting of amino acids are safe to the skin, and have more excellent stability than bio-materials which are found to be unstable and cause skin irritation. Due to the high biological activity of BAP in the field of skin care, its utilization will increase constantly.