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Apoplastic Phloem Loading of Photoassimilate
김성문,허장현,한대성,Kim, Song-Mun,Hur, Jang-Hyun,Han, Dae-Sung 한국잡초학회 1997 Weed&Turfgrass Science Vol.17 No.4
Photoassimilates translocate from regions of carbohydrate synthensis(source) to regions of carbohydrate utilization or storage(sink). In the source, assimilate loads into the phloem for long-distance transport. Current evidence suggests that there are twig loading mechanisms : one involves assimilate transfer via the apoplasm and then load into the phloem by carrier-mediated proton-sucrose cotransport, while the other involves movement through the continuous symplastic connections between the mesophyll cells and the phloem. Inspite of problems associated with the interpretation of experiments, the evidence for apoplastic loading remains convincing because the apoplastic loading systems explains well the observed accumulation capacity arid the selectivity of assimilate uptake by tile phloem.
김성문(Kim, Seong-Mun),김영(Kim, Yeong),서동완(Seo, Dong-Wan),김환용(Kim, Hwan-yong) 한국주거환경학회 2014 주거환경(한국주거환경학회논문집) Vol.12 No.2
In case of Korea, it had become aging society since 2000 because the elderly population had approximately 7.2 percent of the total population due to the development of medical technologies, improvement of quality of life and the increasing of the average life span. This state causes some social problems which are a decrease of the workforce and an increase in social expenses as well as the elderly housing problems, therefore this study suggests that elderly residential facilities be a solution for elderly housing problems but moving in elderly residential facilities needs enormous expense. According to the survey, labor force participation rate of the elderly has increased over 30 percent since 2008 and the elderly people has got more economic power than the past, because they are preparing later life such as retirement pension, savings and investment. Almost the elderly who is over 94 percent to be provided with welfare benefaction not only to apply for jobs, health medical examination but also to take hobbies. Therefore, this study analyzes fundamental factors for developing elderly residential facilities from the elderly and the pre-elderly which intend to move to facilities and practical considerations. Also it aims implementation plan that improves the elderly housing environment including welfare for the aged through analyzing the aged welfare policy and the pensions policy for the present government.