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Ho Thi Quynh Thu,이제니 한국호텔외식관광경영학회 2022 호텔경영학연구 Vol.31 No.7
Vietnam has become a popular international tourism destination. Korean tourists ranked second in the number of international tourists to this location, and Korea represents one of the fastest-growing markets for Vietnam tourism. Hence it is necessary to apprehend the perceptions of Korean tourists toward Vietnam, particularly its attractiveness as a tourism destination. The purpose of this study is to identify the attractiveness of Vietnam as a tourism destination from the standpoint of potential Korean tourists. To achieve its objective, it applies the multi-attribute model to measure the perceived ability of each destination and ascertain the importance accorded by Korean tourists to the locations. In doing so, it attempts to identify the appeal of specific destinations. Further, the study compares the attractiveness of locations for visitors and non-visitors to control for the past visit experiences of tourists. Data were collected from an aggregate of 255 questionnaires administered via online and on-site surveys targeting Koreans who have an interest in Vietnam. The perceived ability and importance scores allotted for each destination attribute were multiplied, and the overall destination attractiveness scores were calculated by totaling the products of all attributes. Also, a t-test was also conducted to evaluate the differences in the assessment of every attribute by visitors and non-visitors. The results revealed that non-visitors accorded the highest score of attractiveness, followed by all potential tourists and visitors. Additionally, all the destination attributes were evaluated differently by visitors and non-visitors. Finally, this paper discusses the theoretical and practical implications of the study’s findings.
Conformational change of organic cofactor PLP is essential for catalysis in PLP-dependent enzymes
Ho-Phuong-Thuy Ngo,Diem-Quynh Nguyen,Hyunjae Park,Yoon Sik Park,Kiwoong Kwak,Taejoon Kim,Jang Ho Lee,Kyoung Sang Cho,강린우 생화학분자생물학회 2022 BMB Reports Vol.55 No.9
Pyridoxal 5’-phosphate (PLP)-dependent enzymes are ubiquitous,catalyzing various biochemical reactions of approximately 4%of all classified enzymatic activities. They transform amines andamino acids into important metabolites or signaling moleculesand are important drug targets in many diseases. In the crystalstructures of PLP-dependent enzymes, organic cofactor PLPshowed diverse conformations depending on the catalytic step. The conformational change of PLP is essential in the catalyticmechanism. In the study, we review the sophisticated catalyticmechanism of PLP, especially in transaldimination reactions. Most drugs targeting PLP-dependent enzymes make a covalentbond to PLP with the transaldimination reaction. A detailedunderstanding of organic cofactor PLP will help develop a newdrug against PLP-dependent enzymes.
Huynh Quynh Thi Vu,Ho Ban Tran,Le Nguyen Quoc Khanh,Trinh Tung Huu,Lam Luu Ho Thanh,Nguyen Ngan Thi Kim,Huang Shih-Yi 대한소아내분비학회 2022 Apem Vol.27 No.2
Purpose: Cranial magnetic resonance imaging (MRI) is recommended to identify intracranial lesions in girls with central precocious puberty (CPP). Yet, the use of routine MRI scans in girls with CPP is still debatable, as pathological findings in girls 6 years of age or older with CPP are limited. Therefore, we aimed to identify the prevalence of brain lessons in CPP patients stratified by age group (0–2, 2–6, and 6–8 years).Methods: This retrospective cross-sectional study recruited 257 girls diagnosed with CPP for 6 years (2010–2016). MRI was used to detect brain abnormalities. Levels of luteinizing hormone, follicle-stimulating hormone, and sex hormones in blood samples were measured.Results: Most girls had no brain lesions (82.9%, n=213), and of the minor proportion of girls with CPP that exhibited brain lesions (17.1%, n=44), 32 girls had organic CPP. Pathological findings were detected in 33.3% (2 of 6) of girls aged 0–2 years, 15.6% (5 of 32) of girls aged 2–6 years, and 3.6% (8 of 219) of girls aged 6–8 years. Hypothalamic hamartoma and tumors in the pituitary stalk were the most common pathological findings. The likelihood of brain lesions decreased with age. Girls with organic CPP were more likely to be younger (6.1±2.4 vs. 7.3±1.3 years, p<0.01) than girls with idiopathic CPP.Conclusion: Older girls appeared to have a lower prevalence of organic CPP. Clinicians should cautiously use cranial MRI for girls aged 6–8 years with CPP.
Huynh Quynh Thi Vu,Ho Ban Tran,Le Nguyen Quoc Khanh,Trinh Tung Huu,Lam Luu Ho Thanh,Nguyen Ngan Thi Kim,Huang Shih-Yi 대한소아내분비학회 2022 Annals of Pediatirc Endocrinology & Metabolism Vol.27 No.2
Purpose: Cranial magnetic resonance imaging (MRI) is recommended to identify intracranial lesions in girls with central precocious puberty (CPP). Yet, the use of routine MRI scans in girls with CPP is still debatable, as pathological findings in girls 6 years of age or older with CPP are limited. Therefore, we aimed to identify the prevalence of brain lessons in CPP patients stratified by age group (0–2, 2–6, and 6–8 years). Methods: This retrospective cross-sectional study recruited 257 girls diagnosed with CPP for 6 years (2010–2016). MRI was used to detect brain abnormalities. Levels of luteinizing hormone, follicle-stimulating hormone, and sex hormones in blood samples were measured. Results: Most girls had no brain lesions (82.9%, n=213), and of the minor proportion of girls with CPP that exhibited brain lesions (17.1%, n=44), 32 girls had organic CPP. Pathological findings were detected in 33.3% (2 of 6) of girls aged 0–2 years, 15.6% (5 of 32) of girls aged 2–6 years, and 3.6% (8 of 219) of girls aged 6–8 years. Hypothalamic hamartoma and tumors in the pituitary stalk were the most common pathological findings. The likelihood of brain lesions decreased with age. Girls with organic CPP were more likely to be younger (6.1±2.4 vs. 7.3±1.3 years, P<0.01) than girls with idiopathic CPP. Conclusion: Older girls appeared to have a lower prevalence of organic CPP. Clinicians should cautiously use cranial MRI for girls aged 6–8 years with CPP.
Ho-Phuong-Thuy Ngo,Diem-Quynh Nguyen,김승환,김정구,안예진,강린우 한국구조생물학회 2019 Biodesign Vol.7 No.2
Xanthomonas oryzae pv. oryzae (Xoo) is a plant pathogen, which causes a bacterial blight of rice. The bacterial blightis one of the most devastating diseases of rice in most of the rice growing countries and there is no effective pesticideagainst bacterial blight. The β-ketoacyl-acyl carrier protein synthase III (FabH) plays a key role in fatty acid synthesis(FAS) and is a promising drug target for the development of antibacterial agents. Xoo0878 gene, a fabH gene, from Xoowas cloned and its gene product Xoo0878 was expressed, purified and crystallized. Xoo0878 crystal diffracted to 2.1Åresolution and belonged to the triclinic space group P1, with unit-cell parameters a = 57.3Å, b = 64.7Å, c = 104.2Å and α =81.6°, β = 84.7°, γ = 74.4°. There are four monomers in the asymmetric unit, with a corresponding crystal volume per proteinweight of 2.65 Å3 Da−1 and a solvent content of 53.6%. Xoo0878 structure will be useful to develop new antibacterial agentsagainst Xoo.
Quynh. T. N. LE,Hyeon Ho LEE,Inseong HWANG 한국퇴적환경준설학회(구 한국환경준설학회) 2022 한국환경준설학회 학술대회논문집 Vol.2022 No.11
To simplify the application of biochar powder for in situ stabilization of polycyclic aromatic hydrocarbons (PAHs) and phthalates (PAEs) in sediments, biochar pellets using Na-OH rice husk biochar were prepared. In this study, bentonite, Al2O3, CaO and MgO were selected as binders of biochar pellets. CaO pellets showed the highest compressive strength among all pellets, and also exhibited the highest moisture uptake. Over 90 % of biochars pellets disintegrated after one month. Different pellets contact times were amended to sediments to reduce the remain of PAHs and PAEs in sediment. Compared with raw biochar, biochar pellets had 20 % lower stabilization efficiency of PAHs and PAEs.
Tunability of Structure and Magnetism in Heusler Mn<SUB>3-x</SUB>Co<SUB>x</SUB>Ga (0 ≤ x ≤ 1)
Quynh Anh Thi Nguyen,Thi H. Ho,S. C. Hong,S. H. Rhim 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.2
Mn₃Ga has drawn interest in spintronics for potential applications due to large perpendicular magnetic anisotropy, high Curie temperature (~760 K), and low magnetization. Motivated by previous studies on tunability of magnetism through transition metal substitutions in Mn₃Ga, we investigate magnetic and structural properties of Mn₃Ga upon Co substitution using first-principles calculations. In the absence of Co, Mn₃Ga is in tetragonal phase. With Co, both tetragonal and cubic phases occur. x ≤ 0.5, tetragonal phase is preferred, while x > 0.5, cubic one is favored. Co magnetic moment in two phases exhibit different magnetic behaviors. In tetragonal phase, unlike other Co compounds, Co magnetic moment nearly vanishes. On the other hand, in cubic phase, it retains a usual moment at about 1 μB. Nearly vanishing Co magnetic moment in tetragonal structure is elucidated phenomenologically by the magnetic exchange coefficient, where coupling between Co and Mn is much smaller than cubic one. Furthermore, anomalous Hall conductivities (AHC) are investigated for x = 0, 0.5, and 1. The magnitude of AHC is about 100~500 S/cm, where the sign change occurs at 0.5 < x < 1.