• Journal of Plant Biotechnology
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• v.39 no.3
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• pp.127-132
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• 2012

We analysed the current status of development of GM crops and national biosafety framework including legislation-related agricultural GMO in China to provide the policy for the development of global GM crops in Korea. In China, several GM crops including cotton, petunia, tomato, sweet pepper, poplar, and papaya have been approved for commercialization and they have been cultivated at more than 4 million ha. In addition, GM rice and GM maize have also obtained approval for productive testing in 2009. China will be the first country to approve GM rice for commercialization. Prior to commercialization in China, all GM crops must be approved by government authority for biosafety assessment specified by national legislation including restricted field testing, enlarged field testing, productive testing and safety certificate. According to China's legislation, agricultural GMOs have been classified by research and testing, production and processing. All GMOs must go through 3 steps of field testing (restricted, enlarged and productive). Prior to conducting each field testing, it has to be approved by government authority. It is assumed that at least one to two years will be taken for each step of field testing (total 4 to 8 years to obtain the final safety certificate) along with a large amount of budget.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.9 no.2
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• pp.153-161
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• 2006

Purpose: This study was designed to investigate rotavirus infection by comparing the clinical characteristics in neonates and infants. Methods: We enrolled 104 neonates and 250 infants wiht gastroenteritis and a rotazyme test positive reaction at the Soonchunhyang University Bucheon Hospital from February 2001 to January 2003. Results: The seasonal peaks of infection in infants occurred from February to June. However, in neonates, it occurred from October to December due to nursery outbreaks. Diarrhea, vomiting, fever and convulsions were significant symptoms in infants; however, metabolic acidosis with dehydration, jaundice, irritability, apnea, bloody stool, gastric residual, grunting, poor oral intake, lethargy as well as fever and diarrhea were more common in the neonates. Upper respiratory infection, pneumonia and bronchitis were present in the infants; however, necrotizing enterocolitis was more commonly observed in the in neonates. Among the patients with rotaviral infection, formula feeding was more popular than breast milk feeding in both the neonates and infants; however, this finding was not statistically significant. Conclusion: Rotavirus can be a significant pathogen in neonates as well as infants. Neonates suffering from fever, poor oral intake, lethargy and apnea should be investigated for rotaviral infection. A new vaccine, rotaviral specific immunoglobulin and treatment guidelines are needed for eradicating rotavirus infection. Further studies on isolation, infection pathway, immune response and treatment of rotavirus are needed.

• Korean Journal of Microbiology
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• v.45 no.3
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• pp.268-274
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• 2009

A photosynthetic cyanobacterium Arthrospira platensis, well known for health food supplement, was studied as a target species for atmospheric $CO_2$ removal as well as biomass production. Although the biomass of A. platensis was massively produced in many countries, the recovery cost of its biomass is still high. The purpose of this study was to develop the A. platensis mutant strains which have enhanced growth rate and floatation activity to reduce the recovery cost. A. platensis KCTC AG20590 was treated with 0.24% ethyl methanesulfonate (EMS) for 20 min at room temperature. The mutant strain A. platensis M20CJK3 was finally selected by its morphological and physiological features. The morphology of the mutant A. platensis M20CJK3 was changed from loose-coiled form to tight-coiled form showing short pitch. The growth and $CO_2$ uptake rate of A. platensis M20CJK3 were improved about 15% and 17% compared with A. platensis KCTC AG20590, respectively. The floatation activity of A. platensis M20CJK3 was enhanced in 2-fold compared with that of A. platensis KCTC AG20590. Soluble proteins extracted from two strains were analyzed by two dimensional electrophoresis (2-DE) and MALDI-TOF MS/MS. Among 15 protein spots induced in 2-DE analysis, two spots were the proteins related to photosynthesis and electron transfer system of the other cyanobacteria. As a consequence, it seems that the tight-coiled mutant A. platensis M20CJK3 has an advantage of high growth rate and floatation activity which are beneficial for the mass cultivation and recovery.

• Korean Journal of Agricultural and Forest Meteorology
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• v.6 no.2
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• pp.85-93
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• 2004

In recent years, technology has advanced so much, especially in the developed world, such that its application in development activities may be lagging behind. The lag between technological advances and its application affects agrometeorological science as well. This paper discusses technological advances that may be better used to communicate agrometeorological information. It is important to bear in mind that technological advances are only channels of communication that may be used to speed up the transference of information from the source to the user. The paper begins with a review of the definitions of 'communication' to put the discussion into context. After reviewing several papers, in simple terms, communication can be defined as the sharing of meaning. The paper also looks at operational communications channels and comes to a conclusion that operational communications channels are pretty much universal irrespective of the development level of a country, although some are more easily accessible in some parts of the world than others. The common communications channels include: newspapers, farming papers, radio, television, fax, email, mobile phones (SMS) and Internet web sites. As part of technological advances, mobile phones are becoming increasingly useful all over the world. In order to make better use of this technology, it is important far those that will use this technology to understand how the technology works, not necessarily in detail, but to be able to operate the technology and obtain the data they need. When it comes to constraints, communication of agrometeorological information requires a substantial amount of resources and it is generally expensive especially when sophisticated models must be operated.

• Journal of the Korean association of regional geographers
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• v.16 no.4
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• pp.400-416
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• 2010

China's inbound tourism became one of the key drivers for economic growth with open-door policy in 1978 and has experienced the fast growth over the past three decades. In 2008, China, as one of the world's leading tourist destinations, is ranked the 4th globally in the number of inbound overnight tourists. Based on China tourism statistics, this paper aims to examine the growth of inbound tourist flows at the national level and the changing spatial distribution by comparing between 1995 and 2008 at the regional level (31 province-level regions) in China. In particular, the spatial distributions of tourist flows from the 6 main generating countries (South Korea, Japan, Singapore, U.S.A., Germany, and Russia) are more concretely analyzed. For five countries except Russia, with slight differences by country, while the eastern area of China is still the most popular destination and western part remains the least visited area, the central part is witnessing the increasing popularity. Russia shows an obvious difference, presenting the spatial pattern that tourist flows are mainly concentrated in the northern and the most southern part of China. This paper helps to understand the dynamics of China's regional changes from an inbound tourism perspective.

• Journal of Information Management
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• v.43 no.3
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• pp.23-41
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• 2012

Citation analysis studies have reported many problems associated with data coverage problems common to popular citation databases such as Web of Science(WoS). In addition, the studies that analyzed citation patterns of Korean publications found that up to 75% of references in Korean publications were to international publications. As a first step in investigating the international coverage of WoS database, the study investigated the effect of adding citation data from Korea Science Citation Database(KSCD) to the impact factors and journal rankings of the journals listed in Journal Citation Reports. Specifically, the study mined the reference data from top 5 Korean Library and Information Science(KLIS) journals to recompute the impact factors reported in JCR 2009. Since the resulting journal rankings did not significantly differ from JCR 2009 rankings except for minor ranking changes, we analyzed additional citation data from 45 computer science and electrical engineering journals. Although the overall ranking difference was not statistically significant, one of the ranking partitions showed significant change. Such study findings despite its limited data sample suggest the potential impact of non-Western citation databases such as KSCD to bibliometric indicators provided by popular citation databases like WoS.

• Korean Journal of Clinical Laboratory Science
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• v.50 no.2
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• pp.100-109
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• 2018

The emergence and dissemination of multidrug-resistant (MDR) Acinetobacter baumannii isolates have been reported worldwide, with most of these possessing the ability to form biofilms. Biofilm formation is an important virulence factor associated with the resistance to disinfection and desiccation. This study examined the genetic basis of antimicrobial resistance mechanisms of biofilm-forming A. baumannii clinical isolates. Imaging and quantification of biofilms were performed by a crystal violet assay and 46 biofilm-forming A. baumannii isolates were selected. Subsequently, 16 isolates belonging to different clones were identified using REP-PCR, and detection of the antimicrobial determinants in the isolates was carried out. The 16 isolates included 9 non-MDR and 7 MDR isolates. The mean biomass $OD_{560}$ values of the non-MDR (0.96) and MDR (1.05) isolates differed but this difference was not significant. In this study, most biofilm-forming MDR A. baumannii isolates contained various antimicrobial resistance determinants ($bla_{OXA-23}$, armA, and mutations of gyrA and parC). On the other hand, most biofilm-forming non-MDR A. baumannii isolates did not contain antimicrobial resistance determinants. These results suggest that there is little correlation between the biofilm-forming ability and antimicrobial susceptibility in A. baumannii isolates. In addition, the emergence of MDR A. baumannii clinical isolates is generally caused by mutations of the genes associated with antimicrobial resistance and/or the acquisition of various antimicrobial resistance determinants.

• Korean Journal of Clinical Laboratory Science
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• v.52 no.1
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• pp.45-52
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• 2020

Hypertension often leads to cardiovascular disease and kidney disease, and hypertention is an important worldwide problem. Body mass index (BMI) has an important role for raising blood pressure. Further, hypertension can be affected by both environmental factors and genetic factors. Many single nucleotide polymorphisms have been associated with hypertension. Genome wide association study (GWAS) is a method of confirming a new locus of increasing the risk of disease, and GWAS has confirmed several single nucleotide polymorphisms (SNPs) that are associated with high blood pressure. This study analyzed the relationship between systolic blood pressure, diastolic blood pressure and SNP of the ATP2B1 gene in 994 Koreans. SNPs that showed the highest statistical significance with systolic and diastolic blood pressures were selected on the multiple linear regression analysis. One-way analysis of variance for systolic and diastolic blood pressures was performed, and multiple logistic regression analysis was performed on the risk of hypertension. The P values were two-tailed, and P<0.05 was considered significant. Four SNPs were associated with systolic blood pressure and six SNPs were associated with diastolic blood pressure. In addition, a genotype-based analysis showed significant odds ratios for the risk of hypertension in older men (adjusted OR, 5.743; 95% CI, 1.173~28.121; P=0.031). This study suggests that the ATP2B1 variants affect both the systolic and diastolic blood pressure.

• Journal of Digital Convergence
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• v.14 no.4
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• pp.11-17
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• 2016

This study is to examine the effect that the degree of alcohol use and the factor of family relationship have on alcohol related problem with elderly people over 65 years old. The study utilized the data from Korea Welfare Panel Study in 2014 published in 2015, which is annually conducted nationwide study. AUDIT (Alcohol Use Disorder Identification Test) of the World Health Organization scale to assess the drinking problem in the study was used. The collected data were analyzed using SPSS 21.0. Presenting some discussions on the basis of the results of this study is as follows. First, looking at a cross-analysis of gender differences in drinking problems, elderly men and elderly women showed different degrees of alcohol problems. Second, looking at demographic characteristics that influence whether a drinking problem, younger age showed a serious drinking problem. Third, looking at the effect that depression and family relationship have on alcohol problem, depression appeared to have relatively more serious effect than the family relationship. According to the above finding, physical and mental health for healthy aging are important factors of the quality of life so a preventive approach to maintain healthy habits is considered to be essential.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.232-239
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• 2001

Young Jong Grand Bridge is approach traffic road of New Inchon International Airport which covers hub airport function in northeast asia. The total span length of this bridge is $4,420{\cal}m$ and this main bridge type is, the first in the world, Double Deck Self Anchored Suspension Bridge, designed as double deck systems to be arranged by road and railroad. Approach bridges to be connected with main span also are composed double deck steel truss and steel box girder to consider a continuity with this span. Our company erected $1,375{\cal}m$(about 60,000tons) of double deck steel truss bridge type which is composed by 6 traffic lane on upper deck and 4 traffic lane and Double track railroad on lower deck. The original installation method of this bridge was planed to install about 75 meters bridge blocks to use floating crane, after temporary bent was constructed between permanent piers. But this method which had to construct many temporary bents in the sea had the matter that construction periods can become lengthen and construction cost can be risen. To overcome the uncertainty to ensure high qualify of bridge and economic project execution, our company developed new bridge erection method to assure both quality control and economic construction work. The new erection method which was developed by us was one that could transport and install long bridge block, $120{\cal}m$ unit at a time and that temporary bent was not required. We hope that this paper is used as technical data which will erect bridge in the western sea and others marine region.