• Asian-Australasian Journal of Animal Sciences
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• v.33 no.4
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• pp.531-538
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• 2020

Objective: Evidence from previous reports indicates that pig domestication in East Asia mainly occurred in the Mekong region and the middle and downstream regions of the Yangtze River. Further research identified two new origin centers for domestic pigs in the Tibetan Plateau and the islands of Southeast Asia. However, due to the small sample size of Tibetan pigs, details of the origin and spread of Tibetan pigs has not yet been established. Methods: We analyzed mitochondrial DNA control region (D-loop) variation in 1,201 individuals from nine Tibetan pig populations across five provinces. Comprehensive Tibetan pig samples were taken to perform the most detailed analysis of Tibetan pigs to date. Results: The result indicate that Rkaze pigs had the lowest level of diversity, while Changdu pigs had the highest diversity. Interestingly, these two populations were both in the Tibetan Plateau area. If we calculate diversity in terms of each province, the Tibetan Plateau area had the lowest diversity, while the Chinese province of Gansu had the highest diversity. Diversity gradient analysis of major haplotypes suggested three domestication centers of Tibetan pigs in the Tibetan Plateau and the Chinese provinces of Gansu and Yunnan. Conclusion: We found two new domestication centers for Tibetan pigs. One is in the Chinese province of Gansu, which lies in the upstream region of the Yellow River, and the other is in the Chinese province of Yunnan.

• Journal of Agricultural Extension & Community Development
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• v.21 no.2
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• pp.29-56
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• 2014

This study conduct for 200 farmhouses who didn't accept new technology like mulberry Protected Cultivation. Through research model combined Innovation diffusion theory(IDT) and Technology Acceptance Model(TAM), it analysed which factors affect for new technology acceptance and diffusion. To verify relations between external factors which affect new technology acceptance and diffusion by endogenous variables such as perceived usefulness, perceived ease of use and perceived riskiness, with external factors, mothed used to analyse it. Most of adopted variables were showed positive results except for individual innovativeness and reliability. Based on the results of these analyses, we can suggest rapid. First, technique diffusion agents should have heighten the level of expertise and technology, and build up the network to solve difficulties with technique supply with mulberry farmhouses. Secondly farmhouses of mulberry outdoor cultivation showed positive attitude protected cultivation, but negative attitude it bacause of the burden of facilities investment. Thus, it is needed to capital investment for individual farmhouse hold. Finally, through cultivation technology education, field trip about mulberry protected cultivation, we can diffuse technology receive for negative farmers.

• Journal of Korean Society of Rural Planning
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• v.26 no.1
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• pp.137-147
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• 2020

Rural Development Administration (RDA) has developed a manufacturing technology which can increase the amount of platycodin D in Platycodon grandiflorum. A study is needed to estimate the value of this new technology and predict the market demand for a new product. This study estimates additional amount of willingness to pay (WTP) using contingent valuation method (CVM) for a new product with the technology that RDA has developed. The survey was created under virtual health functional foods market of Platycodon grandiflorums. It was conducted with 1,000 adult males and females aged between 19 and 59 years old in 17 major cities and provinces nationwide from December 4 to December 7, 2018. The amount of WTP for the health functional Platycodon grandiflorum was drawn using maxinum likelihood estimation method. The estimated average and median WTP values are 21,933.85 won per person and 10,000 won per person, respectively. The independent factors, including the ratio of monthly average health function food consumption to income, the average monthly income level of a household, and existence of family members or relatives engaged in food and nutrition-related professions in a household, have been shown to have a statistically significant influence on the WTP. This study presents the potential magnitude of health functional food market and the value of the new technology based on health functional food market.

• Journal of Microbiology and Biotechnology
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• v.30 no.7
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• pp.982-995
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• 2020

A putative multidrug efflux gene, yddA, was cloned from the Escherichia coli K-12 strain. A drug-sensitive strain of E. coli missing the main multidrug efflux pump AcrB was constructed as a host and the yddA gene was knocked out in wild-type (WT) and drug-sensitive E. coliΔacrB to study the yddA function. Sensitivity to different substrates of WT E.coli, E. coliΔyddA, E. coliΔacrB and E. coliΔacrBΔyddA strains was compared with minimal inhibitory concentration (MIC) assays and fluorescence tests. MIC assay and fluorescence test results showed that YddA protein was a multidrug efflux pump that exported multiple substrates. Three inhibitors, ortho-vanadate, carbonyl cyanide m-chlorophenylhydrazone (CCCP), and reserpine, were used in fluorescence tests. Ortho-vanadate and reserpine significantly inhibited the efflux and increased accumulation of ethidium bromide and norfloxacin, while CCCP had no significant effect on YddA-regulated efflux. The results indicated that YddA relies on energy released from ATP hydrolysis to transfer the substrates and YddA is an ABC-type multidrug exporter. Functional study of unknown ATP-binding cassette (ABC) superfamily transporters in the model organism E. coli is conducive to discovering new multidrug resistance-reversal targets and providing references for studying other ABC proteins of unknown function.

• Proceedings of the Korean Society of Crop Science Conference
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• 1999.05a
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• pp.180-181
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• 1999

• Proceedings of the Korean Society of Crop Science Conference
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• 1998.04a
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• pp.97-98
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• 1998

• Journal of Mushroom
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• v.3 no.4
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• pp.129-132
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• 2005

A new functional mushroom cultivated variety "Jangsaeng" of Fomitella fraxinea was developed by crossing monokaryons derived from collected strains for contribution to mushroom farmers. The major characteristics of this mushroom were compared to Yeongji 2ho of Ganoderma lucidum because of their morphological similarities. The optimal temperature of mycelial growth and fruitbody sprouting and growth were 30 and 25~30, respectively. The surface color of fruitbody pilus was reddish brown and the fruitbody was flat kidney-shaped like Ganoderma lucidum except that the stipe was absent. Its texture was so tough and rigid that the yield per 1,000 ml bottle might be as high as 136 g. The hot water extract of this medicinal mushroom is fit to drink just like Ganoderma lucidum but its taste is not bitter.

• Horticultural Science & Technology
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• v.29 no.2
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• pp.160-163
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• 2011

A new rose cultivar was bred by crossing the red-yellow standard cultivar 'Konfetti' and pink standard cultivar 'Laser' at the Chungcheongbuk-do Agriculture Research and Extension Services. The cross was completed in 2003, after varietal characteristics was tested for 3 years from 2005 to 2007, 'Suryeo' was finally selected in 2007 and registered on the grant of plant variety rights in 2009. The cultivar was developed for a standard-type cut flower with white-pink petals. 'Suryeo' produced 149 stems/$m^2$ in a year and had 64 petals per flower. This new cultivar needed 48 days to flower and showed 12 days vase life. The length of cut stem was about 78 cm, and the fresh weight of stem was 50 g. This cultivar showed high resistance against powdery mildew.

• Journal of Agricultural Extension & Community Development
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• v.8 no.1
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• pp.85-92
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• 2001

As the technology, global economy, and social structures and patterns have rapidly been changing since the 20th century, the forward-thinking leaders in the world begin to realize that they must embrace a new paradigm in management and organizational theories. The new idea of management is focused on equality rather than hierarchical structure, and more responsive to the external environment, more flexible, and better prepared to give customers what they want. From this new paradigm revolution, the nonprofit organizations like youth development organization are trying to approach and implement the new theories and models. This study attempted to introduce the historical trend and a new paradigm of youth development organizational structures and programs in the USA that may help Korea to improve youth organizations and programs. The youth development sector should create healthy, thriving organizations and structures that cultivate staff, programs, partnership between youth and adults, and community.

• Journal of the Korea Safety Management & Science
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• v.8 no.5
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• pp.99-117
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• 2006

Consumers keep demanding for diversified high quality products, valuable services and safety. With this in mind, Distribution Industry is being updated rapidly to accomodate this demand. Meanwhile, Distribution Information Technology of agricultural products has been in slow progress with little in-depth studies. In this study, it has been analyzed the usage of Bar code which is the key element for agricultural Distribution Information Technology. The analysis was conducted through a survey utilizing questionnaire covering 5 Hypermarkets(Super-centers) including big 3 companies. Also, Japanese market trends have been studied to visit a Japan Government Organization concerned, GS1 Japan, an Agricultural Cooperative, an Agricultural Wholesale Market, and a Retail Company. If we could use KAN code for all agricultural products, we could collect and analyze the information of price and trade quantity of them. It opens a new era to understand the agricultural products supply and demand easily. This will certainly make a great contribution to the evolution of agricultural products distribution. From this research, it is suggested that collective efforts by suppliers, wholesalers, retailers and Government Officers are needed to make large scale mutual marketing Organizations, which specialize in sending out agricultural products. The Organization is recommended to standardize and pack every final agricultural products, to promote the use of KAN code.