• Title/Summary/Keyword: chilling effect

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Effect of Prechilling, Light Quality and Daily Irradiation Hours on Seed Germination in Three Campanulan Plants (저온처리(低溫處理), 파종후(播種後) 광질(光質) 및 일중조명시간(日中照明時間)에 따른 도라지, 더덕, 만삼의 발아율(發芽率))

  • Kang, Jin-Ho;Park, Jin-Seo;Ryu, Yeong-Seop
    • Korean Journal of Medicinal Crop Science
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    • v.5 no.2
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    • pp.131-138
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    • 1997
  • Campanulaceae having the most growing areas among medicinal crops cultivated in Korea occasionally failed to establish a reasonable standing in practice. The experiment was carried out to examine the effect of prechilling (0 : 4 : 8 days), light quality (red : white : dark) and daily irradiation hours (8 : 12 : 16) after sowing on seed germination and radicle elongation of Campanulaceae (Platycodon grandiflorum : Codonopsis lanceolata : C. pjlosula) to give an information on their earlier standing establishment. Mean germination rate of P. grandiflorum was the highest but that of C. pilosula was the lowest regardless of all the treatments. 12 hours irradiation or prechilling increased to 8 days enhanced their earlier or later germination, respectively. White light increased the rate of P. grandiflorum but alleviated that of C. lanceolata regardless of the daily irradiation hours. Although prechilling eliminated such effect of white light, light quality treatment effect on their mean germination rates was influenced by period after sowing, daily irradiation hours or prechilling. On the 9th day after sowing, C. lanceolata showed the greatest radicle length, and both daily 8 hours irradiation and 8 days prechilling enforced to elongate their radicles, while P. grandjflorum and C. lanceolata more lengthened their radicles in all prechilling treatments than in no chilling but C. pilosula showed the similar result only in the 8 days prechilling.

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An Ethnographic Study of Sanhubyung experienced by Women in Korean Postpartal Culture (한국의 산후 문화와 여성이 경험한 산후병에 관한 일상생활기술적 연구)

  • 유은광
    • Journal of Korean Academy of Nursing
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    • v.25 no.4
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    • pp.825-836
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    • 1995
  • This ethnogrphic exploratory study sought to de-fine the meaning of Sanhubyung, as consequence from the perspective of the women who experienced it. A convenience sample of 9 elderly women in San Francisco. and 20 postpartal women and their 20 non-professional helpers during postpartum in Seoul, Korea were observed and interviewed for 23 months from January 1991 to December 1992 at the Human Development Center in San Francisco and at the hospital and their homes in Seoul, Korea. Sanhubyung was regarded as the consequence of "Doing a Sanhujori Wrongly," as a group of symptoms or sequelae which have two types of characteristics of symptoms . chronic and acute. It can be called a culture bound syndrome in the cultural context re-lated to childbearing phenomenon in Korea. If women violate the principles of Sanhujori, such symptoms can appear at various times : during the period of postpartum itself, at any time, periodically, especially at the anniversary of the child's birth, late forties, and in old age. Acute symptoms that can be classified into immediate and late types include painful and edematous gingiva, sensitive teeth, strange sensation and pain in the knees or backache. Besides, there is a localized sense of soreness and pain ; sense of being in a draft and cold, stomach upset, GI irritation, chilling, shivering, and tiredness, pain and dazzling in the eyes. Chronic symptoms occur in the head, neck, teeth, back, hands, knees, hands and feet, arms and legs, eyes, sinews and joints, bones, and in the body or as a whole. Generally these symptoms are pain, often accompanying a feeling of being cold and in a draft, regardless of actual weather conditions. In conclusion, this findings reflect the Oriental way of thought of causal relationship of women's health and illness based on the wholistic paradigm of harmony and balance of two forces, Yin(cold) -Yang(hot). It provides a challenge to the professional sector to rethink the effect of culture on health and illness. Finally, it suggests care providers use cultural assessment for the appropriateness of the intervention and quality of care for desirable health outcomes.

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Effects of Temperature on the Development of Chinese Windmill Butterfly, Atrophaneura alcinous (Lepidoptera: Papilionidae)

  • Kim, Seong-Hyun;Hong, Seong-Jin;Park, Hae-Chul;Lee, Young-Bo;Kim, Nam Jung
    • International Journal of Industrial Entomology and Biomaterials
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    • v.25 no.2
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    • pp.159-162
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    • 2012
  • The Chinese windmill butterfly, Atrophaneura alcinous, is an important butterfly for exhibition in butterfly garden. The objective of this study was to determine the effect of temperature on A. alcinous in the laboratory. Development of A. alcinous reared on leaves of Aristolochia contorta was investigated at five constant the laboratory condition (20, 22.5, 25, 27.5 and $30^{\circ}C$) and at relative humidity of 60% with a photoperiod of 14:10 (L:D). Temperatures have been suggested as an important determinant of developmental rate, lifespan and mortality in invertebrates. As the temperature increased, the length of the developmental period gradually decreased. The developmental time (pupation) from egg hatching to pupation was respectively 25.8, 23.6, 19.6, 15.5, and 12.9 days at the temperatures of 20, 22.5, 25, 27.5 and $30^{\circ}C$. And pupation was respectively 40.0, 30.0, 63.4, 50.0, 23.3% at the temperatures of 20, 22.5, 25, 27.5 and $30^{\circ}C$. The developmental threshold temperature estimated for egg-to-pupae was 10.8, with a thermal constant of 230.4 degree-days. Therefore, the optimal developmental temperature for A. alninous was determined to be $25^{\circ}C$. To compare the effects of the total duration of chilling on the termination of diapause, larvae were subjected to a temperature of $8^{\circ}C$ from 60 to 120 days. The rate of termination of diapause was significantly higher at 60 days compared to other incubation period.

Change in the Leading Provider of Investigative Journalism: the Decline of the Public Service Model and the Emergence of a Nonprofit Model (탐사저널리즘의 주체 변동: 공영모델의 조락과 비영리모델의 부상)

  • Park, In-Kyu
    • The Journal of the Korea Contents Association
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    • v.17 no.8
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    • pp.27-38
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    • 2017
  • While the practice of investigative journalism among public service broadcasters has declined in the 2010s, Newstapa, a nonprofit online news organization, emerged as a trustworthy provider of investigative reportage. This study explores the reasons why the realistic conditions for investigative journalism -- such as competent journalists, adequate support systems, and productive cultures -- were first realized and later changed among public broadcasters and in Newstapa. Governmental pressure and the public broadcasting managements' anti-journalism policy had a chilling effect on the production staff of public broadcasters. Their enthusiasm was affected and led to a decline in the production culture of discussion and teamwork. The staff's strong will to practice journalism and the persistence of a production culture that respected autonomy and guaranteed independence enabled Newstapa to become an influential investigative journalism institution in a relatively short period of time. This proves that meaningful investigative journalism is possible when the combined elements of competent and determined journalism practitioners, as well as a system supportive of extensive news gathering and independence of production, are in place. An investigative program is the outcome of ideal broadcasters' journalistic conditions and a vibrant and thriving production culture.

A Study on the Feeding Distance of Aluminium Alloy Casting (알루미늄합금(合金) 주물(鑄物)의 급탕(給湯)거리에 관(關)한 연구(硏究))

  • Jung, Woon-Jae;Kim, Dong-Ok
    • Journal of Korea Foundry Society
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    • v.3 no.1
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    • pp.13-21
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    • 1983
  • In order to determine the feeding distance of aluminiun alloys (Alsi7Mg and AlCu4Ti) bar castings in the sand mold, the distance of the sound castings has been observed by radiograph for various risers, melt treatment, and casting design. Variation of porosity and hardness with the distance from the riser were also measured in order to determine the casting soundness. The results obained were as follows; 1) The modulus of riser should be 1.4 times of the casting`s 2) The maximum distance which can be made sound is greatly dependent on chemical composition and ingate location, and follows the rules given by the formula; a) When the melt flows into the casting first, and the riser afterward, D = 37.7 ${\sqrt{T}}$ for AlSi7Mg D = 31.2 ${\sqrt{T}}$ for pure aluminium D ${\ge}$ 54.8 ${\sqrt{T}}$ for AlCu4Ti Where T = casting thickness in mm Of this maximum distance, $aa{\sqrt{T}}$ for AlSi7Mg and 7.5 ${\sqrt{T}}$ for pure aluminium is made sound by the chilling effect of the casting edge. b) When the melt flows into the casting passing through the riser, $30{\times}30{\times}600mm$ bars can be made sound in all cases 3) Percentage of porosity is higer in AlCu4Ti than AlSi7Mg. And it is increased gradually by moving closer to the riser in case of $30{\times}30{\times}600mm$ bars, but for the $30{\times}30{\times}600mm$ bars it is increased gradually by moving closer to the center of bars. 4) Hardness variation is similar to the tendency of porosity. And it decreased gradually with approaching to the center in case of $30{\times}30{\times}600mm$ bars.

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Electron Transport Activities of Chloroplasts Isolated from the Detached Rice Leaves Stored under Low Temperature with Illumination (광 및 저온처리한 벼잎 절편에서 분이한 엽록체의 전자전달 활성)

  • 문병용
    • Journal of Plant Biology
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    • v.31 no.4
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    • pp.299-307
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    • 1988
  • The electron transport activities of choloroplasts isolated from hte detached rise (Oryza sativa L. cv. Chucheong) leave stored under low temperature(4$^{\circ}C$) with light illumination were investigated to understand the role of light in the low temperature inhibition of photosynthesis in the chilling-sensitive plants. Chlorophyll content of the detached leaves upon incubation at 28$^{\circ}C$ and 4$^{\circ}C$ in the dark was also measured. The rice seedlings were grown with Hoagland medium in the growth chamber of 28$^{\circ}C$ temperature and 400 ft.c fluorescent light with the photoperiod of 16 h. Although chlorophyll content of the detached leaves stored in the dark declined by 61.7% after 28$^{\circ}C$ treatement, there occurred only 5.2% decrease of chlorophyll with 4$^{\circ}C$ treatment. Low temperature treatment(4$^{\circ}C$) for 6 days brought about decreases in total photosystem(PS II+PS I) activities by 35.2% and 73.6% in te presence and absence of light, respectively, while after 28$^{\circ}C$ treatment of the detached leaves for 6 days in the dark there was only 27.6% decrease in PS II+PS I activity. PS II activities were also decreased by 35.6% and 72.2% in the light and dark, respectively. PS I activities were decreased slightly, however, by 7.6% and 16.2% in the light and dark, respectively. Investigations into DPClongrightarrowDCPIP and NH2OHlongrightarrowDCPIP activities revealed that low temperature inhibition of PS II activities was not due to the inactivation of the water oxidation capacity at low temperature. It was concluded that light protects the electron transport activities of isolated rice chloroplasts from the inhibitory effect of low temperature in the detached leaves.

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Conceptual design of cooling anchor for current lead on HTS field coils

  • Hyeon, C.J.;Kim, J.H.;Quach, H.L.;Chae, S.H.;Yoon, Y.S.;Lee, J.;Han, S.H.;Jeon, H.;Choi, Y.H.;Lee, H.G.;Kim, H.M.
    • Progress in Superconductivity and Cryogenics
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    • v.19 no.2
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    • pp.38-43
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    • 2017
  • The role of current lead in high-temperature superconducting synchronous machine (HTSSM) is to function as a power supply by connecting the power supply unit at room temperature with the HTS field coils at cryogenic temperature. Such physical and electrical connection causes conduction and Joule-heating losses, which are major thermal losses of HTSSM rotors. To ensure definite stability and economic feasibility of HTS field coils, quickly and smoothly cooling down the current lead is a key design technology. Therefore, in this paper, we introduce a novel concept of a cooling anchor to enhance the cooling performance of a metal current lead. The technical concept of this technology is the simultaneously chilling and supporting the current lead. First, the structure of the current lead and cooling anchor were conceptually designed for field coils for a 1.5 MW-class HTSSM. Then, the effect of this installation on the thermal characteristics of HTS coils was investigated by 3D finite element analysis.

The Characteristics of Cooling Performance on 7RT Ammonia Absorption System (7RT급 암모니아 흡수식 냉온수기의 냉방성능 특성)

  • Lee, Ho-Saeng;Jin, Byoung-Ju;Yoon, Jung-In;Hwang, Jun-Hyeon;Jin, Slm-Won;Kyung, Ick-Soo;Erickson, Donald C
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.21 no.8
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    • pp.433-438
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    • 2009
  • Experimental results for performance characteristics of small $NH_3$ absorption chiller/ heater are presented. The apparatus consists of 7RT water-cooled absorption system, solution pump, boiler, cooling tower and peripheral devices. The effect of experimental parameters, such as refrigerant mass flow rate, solution mass flow rate and cooling water temperature have been investigated in view of the system performance. The capacity of each heat exchanger increased as refrigerant mass flow rate increased in cooling mode. Also, a cooling capacity increased as a strong solution mass flow rate increased. The cooling and heating COP show 0.5, 1.5 regardless of refrigerant mass flow rate, respectively. The results focus on the evaluation for performance characteristics of system with respect to variation of refrigerant mass flow rate under standard design conditions.

Effect of 1-MCP and Temperature on the Quality of Red-fleshed Kiwifruit (Actinidia chinensis)

  • Kwanhong, Prangthong;Lim, Byung-Seon;Lee, Jin-Su;Park, Hee-Ju;Choi, Mi-Hee
    • Horticultural Science & Technology
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    • v.35 no.2
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    • pp.199-209
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    • 2017
  • This study detailed the effects of 1-methylcyclopropene (1-MCP) on ripening and fruit quality in red-fleshed kiwifruit (Actinidia chinensis) stored at 0 or $10^{\circ}C$ for 20 days, and $20^{\circ}C$ for 13 days. The quality of the fruit was assessed by measuring ethylene production, respiration rate, weight loss, firmness, flesh color, soluble solids content (SSC), and titratable acidity (TA), along with a sensory evaluation. Compared to untreated kiwifruit, fruit treated with $1{\mu}L{\cdot}L^{-1}$ 1-MCP for 24h at $20^{\circ}C$ prior to storage showed a delay in ripening and maintained fruit quality during storage. Ethylene production and respiration rate were affected by 1-MCP treatment only in fruit stored at $20^{\circ}C$, where the values were markedly higher compared to kiwifruit stored at 0 and $10^{\circ}C$. 1-MCP treatment resulted in a clear reduction in weight loss due to a delay in fruit ripening. The firmness of kiwifruit stored at 10 and $20^{\circ}C$ decreased significantly compared to fruit stored at $0^{\circ}C$, but 1-MCP treatment led to a reduction in this loss. Upon storage, SSC increased while TA decreased across all treatments. Sensory evaluation scores increased with decreasing firmness and acidity and increasing SSC. The shelf life of kiwifruit stored at $0^{\circ}C$ was extended without any chilling injury or color changes. In summary, the results show that 1-MCP treatment can potentially maintain quality and delay ripening of red-fleshed kiwifruit stored at all storage temperatures.

Suitability of Alternative Dispute Resolution for the Fashion Industry - Focused on Arbitration for the Fashion Industry - (패션산업의 대체적 분쟁해결제도 적합성 - 패션산업의 중재 제도 도입을 중심으로 -)

  • Lee, Jae-Kyoung
    • Journal of Arbitration Studies
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    • v.25 no.1
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    • pp.87-105
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    • 2015
  • Intellectual property law is slowly fighting to keep pace with the rapid growth of the fashion industry. Copyright and patent law have proven only minimally effective in fashion, even in the US and other top fashion nations, forcing designers and fashion companies to rely on their trademarks to protect their work. Litigating trademark disputes in the fashion industry presents a host of problems as witnessed in a recent Christian Louboutin case, leading the parties to resort to Alternative Dispute Resolution(ADR) and Online Dispute Resolution(ODR). ADR methods, especially arbitration, are increasingly emerging as substitutes to litigation. Using these methods, the fashion industry (CFDA in the US case) should sincerely consider a self-regulating program in which its members, both fashion designers and corporations alike, can resolve disputes in a manner mutually beneficial to all parties in order to preserve the industry's growth, solidarity, and esteem In particular, for the US fashion industry, the ongoing Innovative Design Protection and Privacy Prevention Act(IDPPPA) anti-counterfeit legislation could have caused a chilling effect against innovation. New designers with no name and less resources who could normally flourish producing inspired-by designs may find themselves subject to copyright infringement legislation since the IDPPPA may expand the protection of established designers and brands with more resources. This fear and its implication could be solved by the fashion industry itself since fashion experts know best how to handle these fast-paced issues arising in the field. Therefore, stakeholders in the fashion industry should commit to protecting innovation within fashion on a long-term basis by establishing a panel handling an ADR process. This can mitigate the uncertainty created by the IDPPPA or any other legislation from elsewhere, which could result in a shying away from experimentation with inspired-by designs.