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A study on the hydroponic cultivation of Chinese cabbage for kimchi (김치용 배추의 수경재배에 관한 연구)

  • 한덕철;문성원;김혜자;조재선
    • Korean journal of food and cookery science
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    • v.17 no.5
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    • pp.510-516
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    • 2001
  • Hydroponic cultivation is a technology of raising crops without use of soil. Generally farmers use the method of DFT(deep flow technology)to grow leafy or fruity vegetables; however, systematic and scientific researches are insufficient on this matter. This study investigated the possibility of cultivating Chinese cabbage steadily year long by using the method of DFT. Chinese cabbage was cultivated hydroponically with and without Ge addition, used to prepare kimchi, and the chemical and microbiological characteristics of kimchi were compared. The basic hydroponic cultivation condition was as follows: 30 days after seeding, the raised seeds were moved to a hydroponic bed and given underground water for 3 days so the roots grow normally Standard nutrient solution was provided and the early electric conductivity concentration was maintained between 1.5∼2.5 thickness. The temperature of the solution was maintained between 10 ∼25$^{\circ}C$ to allow the growth of Chinese cabbage. When soil-cultivated, organically cultivated and hydroponically cultivated Chinese cabbages were compared, hydroponically cultivated cabbages were smaller in size and showed less ability to build up and fold leaves into a head, but showed better quality than organically cultivated cabbages. The contents of protein and fat showed no significant differences. The contents of water. Ca, P, Fe, Vitamin A and Niacin were higher in control and Ge-added cabbages compared with soil-grown cabbage. There was no difference between soil-cultivated Chinese cabbage kimchi and hydroponically cultivated Chinese cabbage kimchi.

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Strain Improvement of Leuconostoc mesenteroides for Kimchi Fermentation and Effect of Starter (김치 발효를 위한 Leuconostoc mesenteroides 균주의 개량과 starter로의 첨가효과)

  • Kang, Sang-Mo;Yang, Wan-Suk;Kim, Young-Chan;Joung, Eun-Young;Han, Yong-Gu
    • Microbiology and Biotechnology Letters
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    • v.23 no.4
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    • pp.461-471
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    • 1995
  • The heterofermentative Leuconostoc mesenteroides, which is propagated from the initial to the intermediate stage of Kimchi fermentation, produces organic acids and carbon dioxide to impart refreshment, weak acid taste to Kimchi. But owing to lactic acid production by the homofermentative Lactobacillus Plantarum, Kimchi finally reaches its acidified state. So, Leu. mesenteroides was isolated from Kimchi and identified and was improved by mutation for carbon dioxide production at low pH, and for the high total acceptability. We tested with a wild-type strain K-1 and its improved mutant strain M-10 of Leu. mesenteroides. The wild-type strain K-1 could grow in pH 4.2 at 30$\circ$C or 20$\circ$C, and in pH 5.0 at 10$\circ$C. But the mutant strain M-10 could grow in pH 3.3 at 10$\circ$C. In the respect of total acceptability, mutant strain M-10 inoculated Kimchi was ever better than any others. Mutant M-10 inoculated Kimchi prolonged the optimum ripening period of Kimchi up to two times as compared with the control group.

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Development of Theory of Mind in Preschoolers Who Grow up in Two Conflicting and Unbalanced Cultures

  • Qu, Li;Shen, Pinxiu
    • Child Studies in Asia-Pacific Contexts
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    • v.3 no.2
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    • pp.123-137
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    • 2013
  • Individuals rely on Theory of Mind (ToM) to represent themselves, others, and socio-cultural norms. Distinctive Western and Eastern developmental patterns of ToM have been reported in monocultural children. Relatively little is known about bicultural children, especially those children who grow up in two conflicting and unbalanced cultures. We hypothesized that the development of ToM in these bicultural preschoolers would follow the pattern of the dominant culture. To examine this hypothesis, we recruited English-speaking Chinese Singaporean preschoolers. In Study 1, we tested 3- to 5-year-olds (N = 120) with 5 ToM tasks, including diverse desires, diverse beliefs, knowledge access, and false belief, as well as a vocabulary task. In Study 2, we tested 5-year-olds (N = 30) with a picture-choice version of these ToM tasks. Both studies supported our hypothesis by revealing that the development of ToM in these bicultural children followed the pattern of the dominant culture. Additionally, we found that 5-year-old bicultural children are still developing false belief, and their verbal ability correlated with their ToM.

Intergeneric Transfer of Nitrogen Fixation Genes from Rhizobium leguminosarum by RP4::Mu cts (RP4::Mu cts에 의한 Rhizobium leguminosarum 질소고정 유전자의 속간전달에 관한 연구)

  • 허연주;이영록
    • Korean Journal of Microbiology
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    • v.24 no.3
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    • pp.211-220
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    • 1986
  • Nitrogen fixation (nif) genes of Rhizobium leguminosarum were transferred to nif Klebsiella pneumoniae and E. coli by conjugation after partial heat induction of $RP_4$ :: Mu cts in Rhizobium $R^+$ transconjugant, and the hybrid plasmids in the transconjugant strains were isolated and characterized. In order to transfer the nif genes from Rhizobium, the hybrid plasmid $RP_4$ :: Mu cts was transferred by conjugation from E. coil to the symbiotic nitrogen fixer, R. leguminosarum. After stabillity test, the $RP_4$ :: Mu cts in Rhixobium $R^+$ transconjugant was subjected to partial heat induction by culturing it statically at $38^{\circ}C$ for 16 hours, and then conjugated with the nif defective mutant strains of K. pneumoniae or nif mutant strains of E. coli having whole nif gene plasmid. Recombinant strains of K. pneumoniae, which could grow in a N-free medium and exhibit the nitrogenase activity were selected. However, in the case of E. coli, they could grow well in a NA medium containing antibiotices, but hardly frow in a N-free medium. The hybrid plasmids in these transconjugal strains were isolated by gel electrophoresis and compared their molecular sizes.

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The Evaluation of Major Macroeconomic Indicators in Russia and the Leading Countries-partners

  • Vyborova, Elena Nikolaevna
    • East Asian Journal of Business Economics (EAJBE)
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    • v.5 no.3
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    • pp.1-32
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    • 2017
  • Purpose - This study is to analyze the main macroeconomic indicators in Russia and the leading countries- partners and to research GDP, the debt, the foreign trade and other indicators. This main indicator is using in regulation in the economic stability of country, of stability of trade with countries-partners. Research design, data, and methodology - This paper used the amount of data to be analyzed at the present stage, from the 2010 to 2015 in Russia. In order to assess trends of development, the array of data on the indicators used for the 1995-2017. The data analyzed using the methods of multivariate statistics and application of the software package Stat graphics. Results - Hypothesis 1. In the recent years GDP has tended to increase in the most countries of the world. In Russia and its structure of branch of economics is uneven. Hypothesis 2. The foreign trade turnover also has tended to grow. The foreign trade balance in Russia and in the leading countries-partners has a positive balance, dominated by the export of goods. Conclusions - This paper finds that the foreign trade turnover also has tends to grow. The foreign trade balance in Russia and in the leading countries-partners has a positive balance, dominated by the export of goods.

The Effect of Professor's Individualized Consideration on the Personal Growth of Chinese Students Study Abroad in Korea: The Moderating Effect of Perceived School Support

  • Hahm, SangWoo;Sun, SiYao
    • International Journal of Advanced Culture Technology
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    • v.8 no.2
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    • pp.76-84
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    • 2020
  • In general, members of an organization want their own growth and development. As these members grow or develop, they feel satisfied and fulfilled in the process. Growth or development can motivate members to become more involved in their jobs. Therefore, these concepts are very important for organizations as well as individual members. Various elements of the organization affect the growth of its members. Leaders influence members to achieve organizational goals. Leaders can therefore be an important variable influencing the growth of members. Specific leadership informally develops the potential to identify and satisfy members' personal needs and to achieve higher performance. These leader behaviors motivate members and drive their growth. Thus, this leadership will have a significant impact on the growth of members. In addition, in this relationship, if members have perceived organizational support, they can further improve their expectations for growth. Therefore, support from leaders and organizations will have a positive impact on employee growth. This study highlights the importance of the growth of members of the organization. It demonstrates the moderating effects of leader's individualized consideration and perceived organizational support necessary elements for member growth. Through this process, the purpose and significance of the study are to identify the variables that affect the personal growth of members and explain how they can grow.

Growth and characterization of ZnSe/GaAs(100) by hot-wall technique (HWE 방법에 의한 ZnSe/GaAs(100)의 성장과 특성)

  • 전경남;고석룡;이경준;정원기;두하영;이춘호
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.6 no.1
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    • pp.56-61
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    • 1996
  • A hot wall epitaxy (HWE) apparatus with double source tubes was manufactured. This apparatus can be used to grow two kinds of epilayers at the same time or to grow heterostructures and multilayers. Undoped ZnSe single crystal films were grown on GaAs(100) substrates byusing this apparatus. SEM, XRD and PL analyses indicated that epilayers had good crystalline and optical quality. The epilayers grown at the source temperature 660 .deg. C and the substrates temperature $350^{\circ}C$. in $2 {\times} 10^{-6}$ toor were mirror like and good quality. PL measurements show that the crystalline qualityis comparable with that of the ZnSe/GaAs epilayer grown by molecular beam epitaxy.

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The Effect of Si Underlayer on the Magnetic Properties and Crystallographic Orientatation of CoCr(Mo) Thin Film (CoCr(Mo) 박막의 자기적 특성 및 미세구조에 미치는 Si 하지층의 영향)

  • 이호섭;남인탁
    • Journal of the Korean Magnetics Society
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    • v.9 no.5
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    • pp.256-262
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    • 1999
  • Sputter deposited CoCr(Mo)/Si film were studied with emphasis on the correlation between magnetic properties and crystallographic orientation. The perpendicular coercivities of CoCr films decreased with Si underlayer thickness, whereas those of CoCrMo films increased with Si underlayer thickness. It has been explained that additions of the larger atomic radius Mo atoms in CoCr films impedes crystal growth resulting in a decrease in grain size, thus this small grain size may induce high perpendicular coercivity. The c-axis alignment of CoCrMo film was improved due to addition of 2at.%Mo. It means CoCrMo layer grow self-epitaxial directly from orientation and structure of Si underlayer when the main layer grow on underlayer.

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Studies on the Antifungal Activities of Siccanin and Azalomycin-F in vitro Tests (수종(數種) 진균류(眞菌類)에 대(對)한 Siccanin 및 Azalomycin-F 항진균작용(抗眞菌作用)의 실험관내(實驗管內) 실험(實驗))

  • Koh, Choon-Myung;Choi, Tae-Joo;Kwon, Sung-Won;Lew, Joon
    • The Korean Journal of Mycology
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    • v.1 no.1
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    • pp.29-33
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    • 1973
  • The discovery of ideal therapeutics of fungal infections are remain a major problems of several mycoses. The antifungal activities of a new antifungal antibiotic named Siccanin and Azalomycin-F studies in vitro against some various species of fungi especially dermatophytes. The antifungal activity tests were performed according to the tube-dilution method and all subcultures were incubated at room temperature for 14 days. Results were obtained as follows: 1. All of the Candida spp. were grow on the various concentration of Siccanin tested but Azalomycin-F were growth inhibited at 7mcg-10mcg per ml. 2. Trichophyton spp. and Microsporum spp. were inhibited for growth at 2mcg-6mcg per ml. and 3mcg-5mcg per ml. concentration of Siccanin and 1mcg-4mcg per ml. of Azalomycin-F. 3. Deep mycoses and some saprophytes were grow on the all tested concentration of Siccania and Azalomycin-F.

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Development of Nutrition Education Program that Promotes Eating Behavior of Preschool Children -Especially Focused on Being Familiar with Vegetable- (미취학 아동의 편식지도를 위한 영양교육 프로그램 개발에 관한 연구)

  • Yang, Il-Sun;Kim, Eun-Kyung;Bai, Young-Hee;Lee, So-Jung;Ahn, Hyo-Jin
    • Journal of the Korean Society of Food Culture
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    • v.8 no.2
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    • pp.125-137
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    • 1993
  • The purpose of this study was to develop nutrition education program that promotes eating behavior of preschool children. 118 parents of preschool children were surveyed to understand of children's food preferences and prejudices. The preference for vegetable showed the lowest score(2.345) and fruit was the favorite food(4.11). These results imply the consequence of teaching balanced diet with emphasizing vegetables for preschoolers. Thus, nutrition education program including teaching material were developed to provide the preschoolers with cognitive, affective, and psychomotor activities in order them to the familiar with vegetables. The program were consisted of following five parts: 1. Read-A-Story includes six stories with follow-up activities. 2. Grow-A-Plant gives instructions for growing vegetables. 3. Play-A-Game stimulates children's imagination and learning. 4. Take-A-Trip suggests places to visit that grow, sell, and prepare vegetables. 5. Eat-A-Treat presents easy ways to prepare and enjoy vegetables. Twenty one-Standardized recipes for vegetable dishes were also developed for preschooler's luncheon and snack in daycare center.

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