• Title/Summary/Keyword: Rapid growth

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Does the Edible Sweetener Aspartame Stimulate Plant Growth? (식용 감미료인 아스파탐은 식물의 성장을 촉진하는가?)

  • Donggiun Kim
    • The Journal of the Convergence on Culture Technology
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    • v.9 no.3
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    • pp.601-606
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    • 2023
  • The edible sweetener aspartame is formed from the synthesis of asparagine, one of the amino acids, and phenylalanine. It is a protein ingredient that produces sweetness 200 times higher than sucrose, and is used as a diet product because it is a substance that can replace sugar. Although the effects on animals and humans have been well studied, no studies have been conducted on plant metabolism. In this study, the effect of aspartame metabolism was tested using germinated onion, bean sprouts, and Kalanchoe. The three types of plants with germinated roots showed rapid growth in the early stage of treatment with 1mM aspartame, and showed a nutrient supply effect due to the effect of amino acids, which are constituents. However, when treated for 4 weeks, symptoms similar to lateral roots appear in the form of lignification in onions, the effect of quickly withering is seen in bean sprouts, and senescence of roots appears in 12-week-old Kalanchoe. All of them show accelerated aging after the growth phase. This shows that, among the two amino acids, asparagine is related to auxin generation that induces rapid growth, and it is thought to be the result of lignification due to the effect of phenylalanine.

Management Period Setting Study of through Analysis of the Growth Amount after Planting of Deciduous Broadleaf Species Planted in Ecological Restoration Sites (생태복원지에 식재된 낙엽활엽수종의 이식 후 생장량 분석을 통한 관리기간 설정 연구)

  • Lee, Soo-Dong;Bae, Soon-Hyoung
    • Korean Journal of Environment and Ecology
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    • v.36 no.5
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    • pp.496-506
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    • 2022
  • The growth of trees planted through transplantation rapidly decreases immediately after planting due to extreme disturbances such as root cutting and crown damage. Although the growth rate is recovered as time elapses, the time required to restore the original growth varies by species. Therefore, it is necessary to set an appropriate tree management period for survival after transplantation by analyzing each species' annual growth change. In this study, we analyzed the growth amount of deciduous broad-leaf species planted in the area where the riparian ecological belt was formed and proposed the management period based on the results. Slowed growth immediately after planting is a common phenomenon due to root cutting and pruning, the pre-works performed to increase tree survival rate during the transplantation process. Afterward, the original growth rate is recovered as time passes, but the time required may vary depending on the species and planting environment. Most of the trees showed a rapid decrease in growth immediately after transplantation. After that, although it is different for each species, most of them showed a gradual recovery from 2 years onwards. The analysis of the growth rate by tree species confirmed that it took 2 to 4 years, depending on the tree species, to recover the growth level before transplantation after a rapid decrease in growth immediately after transplantation. The results suggest that improving the defect rate of planted trees is necessary to meet the project objectives: ecological restoration and pollutant reduction. It requires setting a tree management period of at least two years and creating an appropriate base environment.

Modeling the Growth of Bulk Single Crystals via High Performance Computing

  • Andrew Yeckel;Kwon, Yong-Il;Jeffrey J. Derby
    • Proceedings of the Korea Association of Crystal Growth Conference
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    • 1997.06a
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    • pp.115-120
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    • 1997
  • We have developed new algorithms for solution of the three-dimensional, time-dependent Navier-Stokes equations that utilize massively parallel supercomputing implemented on the Connection Machine 5. Here, we apply these techniques to analyze he fluid flows that occur during the growth of the tow nonlinear optical crystals-potassium dihydrogen phosphate (KDP), which is producted in a novel rapid growth system under development by the Lawrence Livermore National Laboratory Laser Division, and Potassium titanyl phosphate(KTP), which is grown from a high-temperature aqueous solution.

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Korean Urbanization in The Asian Context (한국과 아시아지역 국가의 도시화 경향)

  • Huguet, Jerrold W.
    • Korea journal of population studies
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    • v.10 no.2
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    • pp.82-98
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    • 1987
  • The urban population in Asia more than doubled between 1960 and 1985, growing by 3.0 percent per annum on average. Yet during that period, the proportion of the total population living in urban areas increased only from 21 to 27 percent. This seeming paradox is explained by the relatively high rates of rural population growth in Asia, which averaged 1.8 percent over the same period. The Republic of Korea has experienced the most rapid rate of urbanization in Asia during the past century. The proportion urban jumped from 28 percent in 1960 to 65 percent in 1985. There is a clear association between economic growth and the pace of urbanization in Asia. Currently natural increase accounts for about 60 percent of urban growth, but the speed of urbanization is projected to increase after 1990, and migration, reclassification and annexation will comprise about half of urban growth, Seoul is currently the fourth largest urban agglomeration in Asia, and its population is projected to be over 13 million by the end of the century. It is argued that policies to deconcentrate urban population will not be generally successful in Asia and that governments should attempt to manage the growth of large metropolitan areas more efficiently.

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Inclusive Innovation and Growth Based on a National Innovation System: Experience from China

  • Junfang, Zhang;Rong, Guo;Wei, Zhou
    • STI Policy Review
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    • v.3 no.2
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    • pp.66-78
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    • 2012
  • China is becoming a global hot topic because of its rapid economic growth. However, the country show signs of not meeting the expectation of retaining its long-term industrial competitiveness and economic growth, especially with a widening rich-poor gap and natural resource exhaustion. Realizing inclusive growth requires study of an inclusive innovation solution. In this paper, we analyze the feasibility and development path of China's inclusive innovation based on the framework of a National Innovation System, identify examples of inclusive innovation in China, and seek to provide policy suggestions for China's future sustainable development.

저품위 동광석의 세균침출에 관한 연구 2

  • 이강순;민봉희;장정순
    • Korean Journal of Microbiology
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    • v.10 no.1
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    • pp.1-8
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    • 1972
  • This experiment was carried out to investigate the physiological characteristics of isolated bacteria, Ferrobacillus ferooxidans from copper mine water in Korea. The results obtained were as follows ; 1. The optimum pH range for the growth of these bacteria was 2.0-3.0 and optimum temperature was $20^{\circ}C$-$30^{\circ}C$. 2. The oxidation curves of ferrous iron to the ferric iron ran parallel with the growth curves. 3. The optimum nitrogen concentration was 400-800 ppm and the minimal flow rate of air for the maximal growth of the bactria was 70 ml air/min./200ml medium. 4. The growth of these bacteria was inhibited by the absence of ferrous iron and by the addition of sulfur. 5. Ferrous iron at a concentration of 9000 ppm, appeared to be optimum for the most rapid growth of Ferrobacillus ferrooxidans.

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Effect of Bacteriophages on Viability and Growth of Co-cultivated Weissella and Leuconostoc in Kimchi Fermentation

  • Kong, Se-Jin;Park, Jong-Hyun
    • Journal of Microbiology and Biotechnology
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    • v.29 no.4
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    • pp.558-561
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    • 2019
  • This study aimed to understand the survival and growth patterns of bacteriophage-sensitive Weissella and Leuconostoc strains involved in kimchi fermentation. Dongchimi kimchi was prepared, and Weissella and Leuconostoc were co-cultivated in the dongchimi broth. Weissella cibaria KCTC 3807 growth was accompanied by rapid lysis with an increase in the bacteriophage quantity. Leuconostoc citreum KCCM 12030 followed the same pattern. The bacteriophage-insensitive strains W. cibaria KCTC 3499 and Leuconostoc mesenteroides KCCM 11325 survived longer under low pH as their growth was not accompanied by bacteriophages. The bacteriophage lysate of W. cibaria KCTC 3807 accelerated and promoted the growth of Leuconostoc. Overall, our results show that bacteriophages might affect the viability and population dynamics of lactic acid bacteria during kimchi fermentation.

Study on the Improvement of $TiSi_2$ film for Ti-SALICIDE Process Using Ion Beam Mixing and Rapid Thermal Annealing (Ion Beam Mixing과 급속열처리 방법을 이용한 Ti-SALICIDE용 $TiSi_2$ 박막 개선에 관한 연구)

  • 최병선;구경완;천희곤;조동율
    • Journal of the Korean Vacuum Society
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    • v.1 no.1
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    • pp.168-175
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    • 1992
  • The surface and interface morphology as well as the sheet resistance, and uniformity of TiSiz film are significantly improved and the lateral titanium silicide growth over the oxide spacer is minimized by the use of ion beam mixing and rapid thermal annealing in nitrogen ambient. In addition, TiSiz film formations on TiISi and TiISiOz system were also studied.

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Effects of the Rapid Thermal Annealing on the Electrical and Structural Properties of Polysilicon Films (급속 열처리 공정에 의한 다결정 실리콘 박막의 전기적, 구조적 특성 연구)

  • 김윤태;유형준;전치훈;장원익;김상호
    • Journal of the Korean Institute of Telematics and Electronics
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    • v.25 no.9
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    • pp.1060-1067
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    • 1988
  • In this paper, we have investigated the effects of rapid thermal process on the electrical and structural properties of silicon films. It was shown that required times and temperature for the successful activation of dopants (Boron, Phosphorus:5E15atoms/cm\ulcorner were above 1000\ulcorner, 10sec, respectively. The typical resistivities of films deposited below 600\ulcorner were in the range of 1.0 E-3ohm-cm which was 20-30% lower than that of initially polycrystalline silicon depositd above 600\ulcorner. After rapid thermal process at high temperature above 1000\ulcorner, the films did not reveal any change in resistivity due to the dopant segregation, and better electrical conductivity could be obtained by increasing the process time. The grain growth by RTA treatment was more salient in the case of the doped amorphous than that of initially polycrystalline. The surface of the films also preserved the higher structural perfection and surface smoothness.

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A Study on Growth Pattern according to Sasang Constitution (사상체질에 따른 성장패턴)

  • Kim, Na-Young;Lee, Jae-Hoon;Shin, Mi-Ran;Yoo, Jun-Sang
    • Journal of Sasang Constitutional Medicine
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    • v.22 no.3
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    • pp.122-131
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    • 2010
  • 1. Objectives: The purpose of this study is to find out the growth pattern according to Sasang Constitution. 2. Methods: One hundred forty seven students in the first grade of high school were classified into three groups(So-yangin, So-eumin, Tae-eumin) by QSCC II. We obtained the growth distance curve and growth rate, annual increment based on the Health Record according to Sasang Constitution. Health Record ranged from the first grade of the elementary school to the first grade of high school. And we calculated the Body mass index(BMI) and Mid-parential height(MPH). 3. Results: In case of Male, So-eumin and Tae-eumin showed linear growth patterns, but So-yangin showed rapid growth from 13 to 14. In case of Female, all of the groups showed similar growth pattern. But Tae-eumin showed a more growth from 8 to 9 than So-yangin groups. 4. Conclusions: Growth Pattern seemed to be different according to Sasang Constitution.