• 방사선산업학회지
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• 제6권2호
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• pp.153-158
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• 2012

In this research, poly(acrylic acid) (PAAc) hydrogels containing zinc oxide particle were prepared by gamma-ray irradiation. PAAc powder was completely dissolved in distilled water at room temperature. Water-insoluble zinc oxide powder were added into the PAAc solution and stirred until totally dissolved. Finally, the mixture was irradiated by gamma-ray irradiation to make crosslinking. The effects of various parameters such as zinc ions' concentration, irradiation doses were varied and investigated in detail. PAAc hydrogels containing zinc oxide particle were characterized by gel content and swelling ratio. Moreover, the antibacterial properties of this material were evaluated by paper diffusion test against the Gram positive and Gram negative bacteria.

• 대순사상논총
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• 제40집
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• pp.273-302
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• 2022

이 논문은 고전시가 <정읍사>가 갖는 지역문화적 가치를 제고하기 위해, 작품에 대한 해석을 다시 시도하고 <정읍사>를 기반으로 콘텐츠 개발 현황과 문제를 되짚어보는 것을 목적으로 한다. 논의의 결과는 다음과 같다. 첫째, <정읍사> 해석에 대한 기왕의 연구를 정리하여 그에 대한 문제를 제기하였다. <정읍사>를 음설지사 논쟁과 관련된 견해는 아내의 질투 혹은 분노의 감정이 부각되며, 지고지순한 아내의 노래로 보는 견해는 남편의 안위를 바라는 아내의 태도가 수동적인 여성상을 그려내는 데 집중되어 있음이 확인된다. 이 두 가지 해석은 오늘날 지역문화콘텐츠로 <정읍사>를 활용할 적에 얼마만큼 효용적일 수 있는지 의문이 들게 한다. 둘째, <정읍사>는 시적대상과의 공간적 분리를 시적대상의 부재로 이해하지 않는 성숙한 태도가 여성 화자에게 드러나며, 나아가 능동적이고 주체적인 기다림의 자세를 보여준다고 이해되었다. 그러기에 <정읍사>를 음설지사로 간주하거나 수동적 여인상으로 이해하는 것은 재고의 여지가 있다고 보았다. 셋째, <정읍사>에 대한 해석을 기반으로 할 때, 그동안 개발되어 <정읍사> 기반의 콘텐츠는 <정읍사>의 건강성을 담보하지 못하고 슬픔과 분노의 감정에 매몰되어 있다는 문제점이 제기되었다. 이에 <정읍사>가 지역문화콘텐츠로서 활용되기 위해서는 <정읍사>만이 가지는 긍정적 가치를 부각하고 제고되어야 함이 요구된다.

• 공연문화연구
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• 제34호
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• pp.241-276
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• 2017

본 연구에서는 "대악후보"에 악보로 실려 있는 정읍을 부를 수 있는 노래로 복원해 보았다. 먼저 "대악후보" 정읍의 리듬을 찾아 선율을 복원하였고, 복원된 선율에 "악학궤범"의 정읍 가사를 붙여 보았다. 그리고 복원된 정읍이 어떤 음악적 스타일인지도 살펴보았다. 정읍의 리듬은 진작 리듬과 같은 3소박 4박자로 나타났다. 그것은 정읍 장단이 진작 장단을 포함하고 있기 때문이다. 정읍의 장단은 장고점이 한 마디에 한 점씩 나오는 장단인데, 한 박이 3소박으로 되어 있는 점과 한 마디에 장고점 한 점씩 나오는 점은 오늘날의 수제천에 그대로 전해졌다. 정읍의 가사는 같은 장단인 진작1,2와 횡살문을 따라 붙여 보았다. 그 가사붙임에는 다음과 같은 원칙이 나타났다. 가사 한 음보는 선율 두 마디에 붙고, 어단성장이 있으며, 길게 지속하는 음은 어단성장의 장에 해당되는 경우가 많고, 가사는 주로 마디의 첫 음에서 시작되었다. 정읍의 음악적 스타일은 기본적으로 장단이 비슷한 진작1과 비슷하나 약간의 차이는 있다. 가사에 비해 선율의 길이가 매우 길고 같은 음을 길게 지속하는 어단성장의 특성이 강하게 나타나는 점에 있어서는 비슷하다. 그러나 한 가사를 길게 지속할 때 정읍은 간음을 많이 사용하지만 진작은 시김새를 사용하는 점에 있어서는 다르다. "대악후보"에 기보되어 있는 정읍은 이미 변화를 겪어 원 노래에 비해 리듬이 두 배 또는 네 배로 팽창된 것으로 보인다. 리듬이 팽창된 것은 이 노래가 무고 정재의 반주곡으로 사용된 후 무고 무용에 맞추기 위한 것으로 생각된다.

• 방사선산업학회지
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• 제5권1호
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• pp.47-54
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• 2011

In this study, we investigated to evaluate differential expression of genes encoding lipid transfer proteins (LTP) by acute and chronic gamma irradiation in rice. After acute and chronic gamma irradiation by 100 Gy and 400 Gy to rice plant, necrotic lesion was observed in the leaf blade and anthocyanin contents were increased. We isolated a total of 21 rice lipid transfer protein (LTP) genes in the TIGR database, and these genes were divided into four different groups on the basis of nucleotide sequences. The LTP genes also were classified as different four classes according to expression pattern using RT-PCR. Group A, B contained genes with increased expression and decreased expression in acute and chronic, respectively. Group C contained genes with contrasted expression pattern. Group D wasn't a regular pattern. But the specific affinity was not obtained between two grouping.

• 방사선산업학회지
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• 제4권1호
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• pp.25-31
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• 2010

Cooking drips which were obtained as by-product after seafood processing in the food industries, still contain lots of proteins, carbohydrates, and other functional materials. This study was conducted to investigate the effect of gamma irradiation on the biological activities of seafood cooking drips. When the cooking drips of Hizikia fusiformis, Enteroctopus dofleini and Thunnus thynnus were irradiated, the antioxidant activities, whitening effect, and angiotensin I converting enzyme inhibition activity of the ethanol extract from seafood cooking drips were all increased by gamma irradiation. This was because of the increased extraction efficiency of available compounds by irradiation. These results suggested that the seafood cooking drips, wasted as by-products, can be used as functional compounds with gamma irradiation treatment.

• 방사선산업학회지
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• 제5권2호
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• pp.175-178
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• 2011

This study was conducted with effect of lactic acid bacteria by gamma irradiation. Lactic acid bacteria were exposed to irradiation with a single absorbed dose of 1, 2, 3, 4, 5, 6, 8, and 10 kGy. Possible lactic acid bacteria, including Lactobacillus paracasei KCTC 13169, Lactobacillus casei KCTC 3109, Lactobacillus acidophilus KCTC 3140, Lactobacillus plantarum subsp plantarum KCTC 3103, Lactobacillus debruekii subsp bulgaricus KCTC 3635, Streptococcus thermophilus KCTC 3658 were selected. The radiation sesitivities of lactic acid bacteria were expressed as $D_{10}$ values. The $D_{10}$ values of Lactobacillus paracasei, Lactobacillus casei, Streptococcus thermophilus, Lactobacillus acidophilus, Lactobacillus plantarum, and Lactobacillus debruekii were calculated as 0.42, 0.51, 0.47, 0.90, 0.44, and 0.61 kGy, respectively. Results suggest that L. acidiphilus has the highly resistant to gamma irradiation.

• 방사선산업학회지
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• 제5권1호
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• pp.7-13
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• 2011

The present study has been performed to compare the physiological analysis of monocot model plant (rice) in response to ionizing irradiations (cosmic-ray, gamma-ray, and Ion beam). Ionizing radiations were implanted into monocot model plant (rice) seed. After irradiation, the seeds were planted in the plastic pots for a growth period of one month. Thereafter, the morphological and physiological characteristics including malondealdehyde (MDA) and chlorophyll content, activities of antioxidant enzymes in irradiation samples were investigated. We are confirmed that the activity level of MDA and chlorophyll content were not changed by ionizing irradiation samples. However, the free radical contents were increased in all irradiated plants. And the activities of SOD, POD, and APX were significantly increased by irradiation compared with non-irradiation plant.

• 방사선산업학회지
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• 제9권1호
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• pp.9-13
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• 2015

Epoxy resin is widely used as aerospace, automobile, construction and electronics due to their good mechanical and electrical properties and environmental advantages. However, the inherent flammability of epoxy resin has limited its application in some field where good flame retardancy is required. Nano clay can enhance the properties of polymers such as flames retardancy and thermal stability. In this study, we have investigated the nanoclay filled epoxy composite, which has good flame retardancy while maintaining high mechanical properties. The cured epoxy resins were obtained using an electron beam curing process. The nano clays were dispersed in epoxy acrylate solution and mechanically stirred. The prepared mixtures were irradiated using an electron beam accelerator. The composites were characterized by gel content and thermal/mechanical properties. Moreover, the flammability of the composite was evaluated by limited oxygen index (LOI). The flame retardancy of nano clay filled epoxy composite was evidently improved.

• 방사선산업학회지
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• 제5권1호
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• pp.55-62
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• 2011

We investigated the physiological responses by acute and chronic gamma-irradiation in rice. The rice, Oryza sativa L. cv Dongan, plants were irradiated with 100 and 400 Gy of gamma-rays for acute and chronic irradiation, and their morphological, chlorophyll content, MDA, proline and activities of antioxidant enzymes were examined. The plant height of chronic irradiation samples were decrease with increase of a does than the control, but the number of tiller and dry weight of shoot were increased 100 Gy. Carotenoid and chrolorphyll content were decreased of all irradiated plants than non-irradiated plants. But, MDA and proline content were increased in 400 Gy both acute and chronic gamma irradiation. And the activities of antioxidant enzymes were different as gamma-irradiation patterns.

• 방사선산업학회지
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• 제5권2호
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• pp.169-173
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• 2011

This study investigated the effect of gamma irradiation on immune enhancing activity of Chaga mushroom extract (CME). CME was prepared by hot water extraction at $70^{\circ}C$ for 4 hours and lyophilized. Lyophilized CME powder was dissolved with deionized water at $10mg\;ml^{-1}$ and then irradiated at the doses of 10, 30 and 50 kGy by cobalt 60 gamma irradiator. The gamma-irradiated and non-irradiated CME were treated into the splenocyte separated from mouse. Cell proliferation and cytokine production of the immune cells were increased by gamma-irradiated CME and these increases were more prominent when CME was irradiated at higher doses. Therefore, it is considered that gamma irradiation can be an effective method for improvement of the immunomodulating activity Chaga mushroom extract.