• Title/Summary/Keyword: Origins

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Peripheral Generation of $CD4^+CD25^+Foxp3^+$ Regulatory T Cells

  • Kim, Byung-Seok;Park, Young-Jun;Kang, Chang-Yuil
    • IMMUNE NETWORK
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    • v.7 no.1
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    • pp.1-9
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    • 2007
  • [ $CD4^+CD25^+$ ] regulatory T cells (Tregs) expressing the lineage-specific marker Foxp3 represent an important regulatory T cell that is essential for maintaining peripheral tolerance. Although it was believed that Treg development is solely dependent on the thymus, accumulating evidence demonstrates that Tregs can also be induced in the periphery. Considering the various origins of peripherally developed $CD4^+CD25^+Foxp3^+$ regulatory T cells, it seems likely that multiple factors are involved in the peripheral generation of Tregs.

The Comparative Study of the Eight Extra Meridians and the Primitive Meridians (가기경팔맥(加奇經八脈)과 조기경맥(早期經脈)의 비교연구)

  • Lee, Dong-Ho
    • Journal of Acupuncture Research
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    • v.23 no.4
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    • pp.91-100
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    • 2006
  • Objectives : The Comparative Study Of The Eight Extra Meridians And The Primitive Meridians Will Improve The Understanding Of The Relationship Between Meridians And The Eight Extra Meridians, Which Ultimately Will illuminate The Origins Of Meridians. Methods Books From The Pre-Han And Han Dynasty, As Well As Publications Concerning Meridians And The Eight Extra Meridians Were Utilized. Results : Pathways Of The Eight Extra Meridians And The Primitive Meridians Travel Independently Without Connection With Other Meridians, And Have No Obvious Link With The Five Vital Organs And The Six Viscera. Additionally, The Terminology Of Both Meridians Is Similar, And Travel From Bottom To Top. Conclusion : The Eight Extra Meridians Have Several Similarities With The Primitive Meridians. Therefore, The Eight Extra Meridians May Be An Important Area To Investigate In The Future.

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Fluorescence Spectroscopic and Time-Dependent Density-Functional Theory Studies of Diphenylsilane

  • Boo, Bong-Hyun;Lee, Jae-Kwang
    • Bulletin of the Korean Chemical Society
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    • v.33 no.3
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    • pp.993-996
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    • 2012
  • We investigated fluorescence and fluorescence excitation of diphenylsilane (DPS) in a solution and molecular beams in combination with the aid of the DFT method. When the molecule was photoexcited at 250 nm in a cyclohexane solution, normal and excimer fluorescences were observed in the ranges of 260-320 and 330-450 nm, respectively. The fluorescence excitation spectrum indicates that the channel leading to the intramolecular excimer formation is not efficient in comparison with the normal fluorescence. Vibrationally resolved fluorescence excitation spectra were measured for the DPS molecules cooled in pulsed supersonic expansion of He in the range 262.2-271.7 nm, in which we can see several electronic excitation spectra exhibiting the electronic band origins. We found that the simulated absorption spectrum based on the time-dependent densityfunctional theory calculations accords well with the absorption spectrum.

The Ideologies Expressed on African-American Hair-styles (아프리칸-아메리칸 헤어 스타일에 나타난 이데올로기)

  • Chang, Mee-Sook
    • The Research Journal of the Costume Culture
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    • v.19 no.2
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    • pp.402-415
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    • 2011
  • The purpose of this study is to research the ideologies of African-American hair-styles according to cultural phenomena. This is a qualitative research using the books and theses about society, culture, hair and beauty, and materials of internet. The results are; Firstly, African-Americans are citizens or residents of the United States who have origins in any of the black populations of Africa. About 75 percent of the dark-skinned people on this continent have hair labeled "kinky". Secondly, African hair-styles expressed Supernaturalism and Traditionalism in the formative period of African culture. African-American hair-styles reflected Colonialism in the period of slaves. African-American citizen's hair-styles showed Nationalism after 1960s' Black Pride Movement in the period of settlement in America, and expressed De-territorialism since the boom of 1970s' Reggae. Today, the wearing of dreadlocks, cornrows, and afros has transcended racial and religious barriers. No longer necessarily reflections of ancient traditions and cultural identification, they are just as often fashion items.

Origins of Addiction Predictably Embedded in Childhood Trauma: A Neurobiological Review

  • Wiet, Susie
    • Journal of the Korean Academy of Child and Adolescent Psychiatry
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    • v.28 no.1
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    • pp.4-13
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    • 2017
  • The seeds of addiction are typically sown years prior to the onset of addictive substance use or engagement in addictive behaviors, due to the priming of the reward pathway (RewP) by alterations in the mechanism of stress-signaling from the hypothalamic-pituitary-adrenal axis (HPA) and related pathways. Excessive stress from a single-event and/or cumulative life experiences during childhood, such as those documented in the Adverse Childhood Experiences Study, is translated into neurobiological toxicity that alters the set-point of the HPA axis and limbic system homeostasis [suggested new term: regulation pathway (RegP)]. The resultant alteration of the RegP not only increases the risk for psychiatric and physical illness, but also that for early onset and chronic addictions by dysregulating the RewP. This paper reviews the interface of these symbiotic pathways that result in the phenotypic pathology of emotional dysregulation, cognitive impairment, and compulsive behaviors, as well as morbidity and shorter life expectancy when dysregulated by chronic stress.

Optoelectric properties of gate-tunable n-MoS2/n-WSe2 heterojunction with proper electrode metals

  • Lee, Seom-Gyun;Park, Min-Ji;Yu, Gyeong-Hwa
    • Proceedings of the Korean Vacuum Society Conference
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    • 2016.02a
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    • pp.332.2-332.2
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    • 2016
  • Two dimensional transition-metal dichalcogenides (TMDs) semiconductors are attractive materials for optoelectric devices because of their direct energy bandgap and transparency. To investigate the feasibility of transparent p-n junctions, we have fabricated a p-n heterojunction consisting of p-type WSe2 and n-type MoS2 flakes since WSe2 and MoS2 with proper electrode metals exhibit p-type and n-type behaviors, respectively. These heterojunctions exhibits gate-tunable rectifying behaviors and photovoltaic effects (ECE ~ 0.2%) indicating that p-n junctions were formed. In addition, photocurrent and photovoltaic effects were observed under light illumination, which were dependent on the gate voltage. In addition, the photocurrent mapping images indicate that the photovoltaic effects comes from the junction area. Possible origins of gate-tunability are discussed.

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Saccharomyces cerevisiae를 이용한 재조합 인간 훼리틴 발현 연구

  • Gang, Hwan-Gu;Lee, Chung-Yeol;Kim, Won-Cheol;Yun, Ji-Seon;Park, Hyeong-Su;Lee, Ji-Won;Jeong, Bong-Hyeon
    • 한국생물공학회:학술대회논문집
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    • 2001.11a
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    • pp.438-440
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    • 2001
  • Ferritin an iron-storage protein. is found in bacteria and some animal tissues such as liver, spleen and bone marrow. It is more effective and causes less side reactions than traditional ferrous sulfate, which has been used primarily to treat iron deficiency in pregnancy anemia. Currently, the ferritin extracted from bovine and equine spleens are sold as a commercial product. Its markets are several hundreds of million US dollars. However, because of recent warnings against the viral diseases of animal origins such as mad cow disease, a safer ferritin is sought after. In this study, a production process for human ferritin was successfully developed. The amount of its produced in yeast is high enough to be economically viable.

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Production of Inulo-oligosaccharides from Inulin by a Purified Endoinulinase from Aspergillus ficcum (ASpergillus ficuum 기원의 정제 endoinulinase를 이용한 이눌린으로부터 이눌로올리고당의 생산)

  • 윤호범;김동현;윤종원;김병우;송승구
    • KSBB Journal
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    • v.13 no.3
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    • pp.284-288
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    • 1998
  • Production of inulo-oligosaccharides from inulin was carried out with the maximum yield of 94% using a purified endoinulinase from Aspergillus ficcum. The optimum reaction temperature and pH were 55-60$^{\circ}C$ and pH 5.5-6.0, respectively. The Michaelis constant and maximum reaction velocity of the endoinuinase for inulin were 13.27 g/L and 0.13 g/L$.$min at 55$^{\circ}C$, pH 5.5, respectively. Inulin source had no significant effect on oligosaccharide yield and product composition, although initial production rate differed according to inulin origins. The reaction pH was a critical factor in inulo-oligosaccharide production because considerable free monosaccharides were released, decreasing oligosaccharide yield at low pH conditions. An empirical relationship describing the reaction performance was developed from kinetic data: the time to reach maximum oligosaccharide yield (tw) as a function of initial concentration of inulin (lo) and enzyme (Eo); i.e., log tM = -1.025 log Eo - 0.011 l0 + 2.655.

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A Comparative Linguistic Study on Kokal (고깔의 比較 言語學的 硏究)

  • 김진구
    • The Research Journal of the Costume Culture
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    • v.3 no.2
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    • pp.193-199
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    • 1995
  • The purpose of this research was to study the origins and the meanings of the Kokal (고깔). Comparative linguistic analytical approaches were employed to trace the development of the word, the Kokal(고깔). Results of this study revealed that the kotkal(곳갈, 곧갈) was a general term referring to a variety of head coverings in eh period of Choson Dynasty. This broad meanings of the Kotkal(곳갈,곧갈) of the Chosun Dynasty period has been changed to a narrow sense meanings a conical cap made of folds of the material, mainly used by some of the Buddhist monks in modern Korean. Also, the phonetic value of the Kotkal(곳갈,곧갈) of the Choson Dynasty period changed to the Kokal(고깔) in modern Korean. A variety of words for the Kokal(고깔) was found in the different languages such as Latin, English, French, Turkish, German, Mongolian, and Chinese. The examination and analysis of this study indicated that the origin of the Korean word Kotkal(곳갈,곧갈) or Kokal(고깔) and the meanings of it were derived from LL. Cuculla(monk's cowl)

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A Study on Ma Je Kai Shi(麻帝核試) (麻帝核試의 硏究)

  • 김진구
    • The Research Journal of the Costume Culture
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    • v.5 no.4
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    • pp.6-11
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    • 1997
  • The purpose of this study was to identify and to trace the source of origins of 麻帝核試 that appears in Kei Rim Yu Sa(鷄林類事). Comparative liguistic analytical approaches ware employed for this study. Results of this study revealed that madi(마디) survives as a dialect for m ∂ri[머리(頭)] in Kyung Sang Province Thus, it si considered that the dialect madi(마디) is a survival of 마디(麻帝) of Koryo. Similar words to 核試 of Koryo were found in Hebrew and Japanese : Heb. k-u-tsi(zi) means locks of hair and Japanese ku-shi(くシ) has several meanings : comb, head, and the hair of the head. The word 麻帝核試 of Koryo is a compound ward of madi(麻帝), head and k ∂ shi(그시) 核試 locks of hair(hair of the head). 核試 of Koryo , Jao. ku shi(くシ), and Heb. k-u-tsi(zi) showed close relationships to one another. The word ku shi(si) 그시 核試 was derived from Heb. k-u-tsi(zi) and Jap. ku shi(くシ) was originated from 核試 of Koryo. Kor. ku shi(si) 그시 核試 is a transliteration of Heb. k-u-tsi(zi) and Jap. ku shi(くシ) is a trans-literation of Kor. ku shi 그시 核試.

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