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Jargal Byambaa,신광섭 한국생산관리학회 2023 한국생산관리학회지 Vol.34 No.4
It is crucial for urban and regional planners, policymakers, and stakeholders involved in airport development and management to understand and acknowledge the importance of an airport’s hinterland. The relationship between the airport and its surrounding areas is synergistic, and it plays a vital role in promoting sustainable growth and development not only locally but also regionally and internationally. Therefore, acknowledging the significance of an airport’s hinterland is essential for ensuring sustainable and responsible development in the long run. This research studies the possibility of building a new hinterland to improve the operation of Chinggis Khaan International Airport in Mongolia. The importance of the various factors is determined based on survey results from industry experts and then obtained via the analytic hierarchy process (AHP). Given our results, the government of Mongolia could identify the areas that it needs to concentrate on to improve its international airport in terms of cargo volume.
Complete genome sequence of Janibacter indicus TT2, isolated from the human ear skin
Jargal Jambaldorj,Munkhtsatsral Ganzorig,KYOUNG LEE 한국미생물학회 2020 미생물학회지 Vol.56 No.4
Janibacter indicus TT2 was isolated from the human ear skin for its ability to degrade t-octylphenol polyethoxylates (Triton X-100). Herein, we report the whole-genome sequence and gene annotations of J. indicus TT2. This strain possessed one circular chromosome comprising 3,663,756 bp, with the G + C content of 71.0%, encoding 3,452 protein-coding genes, two ribosomal RNA operon copies, and forty-nine tRNA genes. In addition, we found that strain TT2 had dehydratase and hydroxylase genes in its genome that might be responsible for removal of the ethylene oxide units and oxygenation of the t-octylphenol moiety of Triton X-100, respectively.
Development and Characterization of Hyperglycosylated Recombinant Human Erythropoietin (HGEPO)
JarGal, Naidansuren,Min, Kwan-Sik The Korean Society of Animal Reproduction 2009 Reproductive & developmental biology Vol.33 No.2
Erythropoietin (EPO), a glycoprotein hormone produced from primarily cells of the peritubular capillary endothelium of the kidney, is responsible for the regulation of red blood cell production. We have been investigating the roles of glycosylation site added in the biosynthesis and function of recombinant protein. We constructed three EPO mutants ($\Delta$69, $\Delta$105 and $\Delta$69,105), containing an additional oligosaccharide chains. EPOWT and EPO$\Delta$69 were effectively expressed in transient and stably transfected CHO-K1 cell lines. But, it wasn't detected any protein in the culture medium of EPO$\Delta$105 and EPO$\Delta$69,105 mutants. The growth and differentiation of EPO-dependent human leukemic cell line (F36E) were used to measure the cytokine dependency and in vitro bioactivity of rec-hEPO. MTT assay values were increased by survival of F36E cells at 24h. To analysis biological activity in vivo, two groups of ICR-mice (7 weeks old) were injected subcutaneously with 10 IU per mice of rec-hEPO molecules on days 0 and 2. Red blood cell and hematocrit values were measured on 6 days after the first injection. The hematocrit values were remarkably increased in all treatment groups. The pharmacokinetic analysis was also affected in the mice injected with rec-hEPO molecules 2.5 IU by tail intravenous. Protein samples were detected by Western blotting. An EPO$\Delta$69 protein migrated as a broad band with an average apparent molecular and detected slightly high band. Enzymatic N-deglycosylation resulted in narrow band and was the same molecular size. The biological activity of EPO$\Delta$69 was enhanced to compare with wt-hEPO. The half-life was longer than wt-hEPO. The results suggest that hyperglycosyalted recombinant human erythropoietin (EPO$\Delta$69) may have important biological and therapeutic good points.
Luvsanchultem Jargal,Yong Il Lee 한국지질과학협의회 2006 Geosciences Journal Vol.10 No.1
The transport of P sources (organic and inorganicphosphorus) using electrokinetic process through a low-permeabil-ity soil was investigated. A series of batch experiments was conductedto construct the adsorption isotherms of KH2PO4 and triethyl phos-phate (TEP) on kaolin soils. Approximately 60.3% of phosphorusfrom KH2PO4 was adsorbed within 24 hours, and the maximumadsorption (73%) was attained at 6 days after adsorption. In contrast,TEP showed no P adsorption in 7 days, thus suggesting an alter-native P source that may maintain a favorable proportion ofC:N:P through the effective delivery during in situ bioremediationin low permeability soils. Experiments using electrokinetic processwere carried out with electrokinetic reactor having a hydraulicconductivity of 1.99×107 cm s1 for a 0.01M NaCl aqueous solution.TEP and KH2PO4 were used as organic P source and inorganic Pnear the platinum anode and near the platinum cathode, respec-tively. Potassium dihydrogen phosphate was not distributed uni-formly along the soil column and most of transported phosphoruswas changed to water-insoluble aluminum phosphate after 12 daysof treatment, indicating the decrease of bioavailability of the phos-phorus. In case of TEP, the advancing P front progressed with time,resulting in uniform P distribution through the kaolin column. Interms of transport, organic phosphorus, TEP, would be a moreeffective P source than inorganic phosphorus, KH2PO4, in electro-kinetic enhanced bioremediation.
인공저수지의 영양염류-N:P비율 상태의 계절적 변동과 토지이용도에 따른 영양염류-Chl-a 상관관계
남스라이자갈 ( Namsrai Jargal ),이상재 ( Sang-jae Lee ),안광 ( Kwang-guk An ) 한국환경생태학회 2021 한국환경생태학회 학술대회지 Vol.2021 No.2
Water quality degradation and eutrophication are strongly related to land-use practices around freshwater systems. Here, we investigated an impact of predominant land use on seasonal dynamics of organic matters, nutrients, the ratios of N:P and CHL-a:TP, and algal biomass in Korean reservoirs (n=9) based on long-term monitoring of 2006-2020. It was also examined relationships between nutrients and the algal biomass in reservoirs altered by predominant land-use pattern. The algal biomass was assessed by chlorophyll-a (CHL-a) concentration. Compared to forest-dominated reservoirs (FDRs), agricultural dominant reservoirs (ADRs) and estuarine reservoirs (ERs) manifested relatively high concentrations of suspended solids (TSS), organic matters, phosphorus contents, and the algal biomass, especially the ERs. According to total phosphorus (TP) averages in each type of reservoir, a risk of blue-green algal dominance was high in the ERs (~80%), moderate in the ADRs (~40%), and low in the FDRs (< 10%) for our study. The intense rainfall periods during July - August were a primary environmental factor for seasonal increases of nutrients into the reservoirs. Particularly, the escalation in TP was observably in line with rainfall runoff into the ADRs. But total nitrogen (TN) in the ERs visibly reduced during the intense rainfall months due to ionic dilution by rainfall-water. The seasonal dynamic of predicted CHL-a differed through the three types of reservoirs, showing a seasonal distinct pattern of algal bloom. Correspondingly, the seasonal dynamic in CHL-a:TP ratio varied by the land-use patterns. It was relatively higher during winter in the ERs, and yet showed higher values during summer and fall in the ADRs. The seasonal reduction in N:P ratio was strongly connected to the increase of TP, as well as an intensity of anthropogenic activity. Furthermore, the empirical regression model showed that the algal biomass was significant positive relation with both TN (R2=0.44, p<0.001) and TP (R2=0.78, p<0.001), whereas showing negatively associated to N:P ratio (R2=0.49, p<0.001). However, the empirical nutrients-CHL-a models in reservoirs altered by the predominant land-use patterns. TP was most important predictor of CHL-a level in both the FDRs (R2=0.60, p<0.001) and the ADRs (R2=0.87, p<0.001), supporting P-limitation for algal growth. But the power of TP-CHL-a relation observably reduced for the ERs (R2=0.25, p<0.05) compared to the FDRs and the ADRs. This result was mainly driven by hypereutrophic nutrient conditions, and thus light availability was likely a more important predictor of CHL-a level in the ERs.
다목적 저수지 유입 영양염류, Chl-a 상태에 대한 장마기간의 장기적 및 계절 영향 평가
남스라이자갈 ( Namsrai Jargal ),우스만아티크 ( Usman Atique ),마문MD ( Md Mamun ),블랜디나제네스카코레 ( Blandina Genes Kakore ),안광국 ( Kwang-guk An ) 한국환경생태학회 2021 한국환경생태학회 학술대회지 Vol.2021 No.2
Due to rapid eutrophication, sustainable water quality management and supply are essential in drinking water sources and aquatic biota in large reservoirs. We evaluated the potentially crucial factors influencing the algal chlorophyll (Chl-a), nutrients, and the links between the rainfall and other vital elements in a large multipurpose reservoir (Yongdam Reservoir) during 2013-2019. We developed the empirical models on algal Chl-a, total phosphorus (TP), total nitrogen (TN), and TN:TP’s ambient ratios considering the maneuvering influence of Asian monsoons. The intensive rainfall during the monsoon months strongly impacted the nutrient regime and other vital factors. The seasonal patterns of algal Chl-a varied in response to the nutrient contents (TN, TP), suspended solids, and ambient N:P ratios along the longitudinal gradient. The conditional plot analysis, empirical modeling, and observations supported an overall P-limitation scenario, as was evident from the magnitude of N:P ratios (R2 = 0.36, F = 24.9, p < 0.001). Furthermore, the reservoir’s trophic status alluded to the larger particles and blue-green algae during the monsoon and postmonsoon months. The correlation analysis, Mann- Kendall trend test, and principal component analysis illustrated compelling links between CHL-a, TP, and rainfall regime. The outcomes suggested the reservoir was primarily controlled by phosphorus limitation, with an increasing CHL-a tendency along with nitrogen dilution. However, a slight decline in phosphorus was also detected. The Yongdam Reservoir is under the threat of recurrent eutrophication events that could jeopardize this vital drinking water facility due to increasing agricultural and anthropic activities.