• Asian-Australasian Journal of Animal Sciences
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• 제17권6호
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• pp.808-813
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• 2004

This study was conducted to evaluate the effects of adding glucose (G), sorbic acid (S), pre-fermented juice of epiphytic lactic acid bacteria (FJLB) and their combinations on the fermentation qualities and residual mono-and di-saccharides compositions of guineagrass silage. The additives used in this experiment were 1% glucose, 0.1% sorbic acid and FJLB at a theoretical application rate of 9.0${\times}$105 CFU $g^{-1}$ on the fresh weight basis of guineagrass, respectively. There was a total of eight treatments in this experiment: (1) C (without additives), (2) FJLB, (3) S, (4) G, (5) FJLB+S, (6) FJLB+G, (7) S+G, (8) FJLB+S+G. After 30 days of storage, the silos were opened for chemical analyses. Based on the results, all additives were efficient in improving the fermentation quality of guineagrass silage. This was well indicated by significantly (p<0.05) lower pH and BA content and significantly (p<0.05) higher LA content in the treated silages except for the FJLB than in the C. However, there was only a slight increase in LA for the FJLB as compared with the C, which might be due to the low WSC content of the original guineagrass (34.4 g $kg^{-1}$). When the FJLB+S and FJLB+G were added, there were significant (p<0.05) decreases in pH and significant (p<0.05) increases in LA as compared with the FJLB alone. This indicated that the G, S and FJLB were of synergestic effects on the silage fermentation quality. The G combination treatments including the G alone showed large improvements in the fermentation quality as compared with the treatments without the G. This suggested that adding fermentable substrates (G) to plant materials such as guineagrass, which contain low WSC, intermediate population of epiphytic LAB, CP and DM content, is more important and efficient for improving the fermentation quality of silages than adding a number of species of domestic LAB (FJLB) and aerobic bacteria inhibitor (S).

• 방사성폐기물학회지
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• 제13권1호
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• pp.21-34
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• 2015

원자력발전소 해체를 준비하기 위해서는 해체대상 발전소에 대한 선원항 평가가 선행되어야 한다. 해체전략 수립단계에서 선원항 평가 결과를 토대로 해체 폐기물을 분류하고 비용평가를 수행한다. 본 연구에서는 월성 1호기의 예비 선원항 계산을 수행할 수 있도록 MCNP/ORIGEN-2 모델의 타당성 평가를 수행하였다. 연소도가 다른 핵연료 다발의 악티나이드 계열과 핵분열 생성물의 핵종 수밀도는 싱글 채널 모델을 이용하여 MCNPX 코드로 연소 계산하여 구하였다. 선원항의 정확도에 영향을 미치는 두가지 요인에 대해 조사하였다. 첫번째 요인으로 선원항 계산에 영향을 미치는 중성자 스펙트럼을 MCNP로 계산하여 해당 핵종의 1군 미시 핵단면적에 반영하였다. 중성자 스펙트럼이 반영된 라이브러리로 계산한 선원항과 ORIGEN-2 코드 package에 내장된 library (CANDUNAU.LIB)로 구한 선원항을 비교하였다. 두번째 요인으로 선원항에 대한 출력이력의 영향을 조사하였다. 해체 폐기물의 저준위 폐기물 처분 가능성을 살펴보기 위해, 2010년도 교체된 압력관, 칼란드리아관과 기존 칼란드리아 동체에 대하여 중성자 스펙트럼을 반영한 library를 적용하여 MCNP/ORIGEN-2로 선원항 평가 계산을 수행하였다.

• 대한환경공학회지
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• 제28권8호
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• pp.829-835
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• 2006

PBDEs의 조성, 발생원 및 지역적 농도 분포를 확인하기 위해 국내의 여러지역(서울, 안성, 청주, 울산, 대구, 부산, 파도리)에서 자생하는 소나무 잎을 채취하였다. Hepta-BDE부터 deca-BDE까지의 동족체(homologs) 농도는 총 PBDEs의 농도와 매우 유의한 상관성(Pearson 상관계수 r>0.96, p<0.001)을 보였다. Deca-BDE는 다른 homologs에 비해 모든 시료에서 최대농도를 나타내었다. PBDE 함유 제품(Bromkal 70-5DE, DE-71)과 소나무 중 침착된 PBDE 동질체(congeners) 사이의 상관성이 높게 나타나 PBDE 함유 제품이 본 채취지점에서 발생원으로 평가되었다. 또한 BDE-47, -99, -100, -206, -207 및 -209는 모든 소나무 잎에서 주된 성분을 나타내었는데 이는 전세계적으로 다량 사용된 penta-BDE와 deca-BDE 함유 제품이 국내에도 다량으로 사용되었기 때문으로 판단된다. 그러나 BDE-209와 BDE-47, -99, -100간의 상관성은 유의하지 않았는데 이는 tetra-BDE와 penta-BDE는 대기-토양 분배와 같은 2차 발생원에 영향이 지배적인 반면 deca-BDE는 여전히 1차 발생원의 영향이 2차 발생원의 영향보다 지배적이었기 때문으로 판단된다.

• 한국조경학회지
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• 제26권2호
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• pp.54-61
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• 1998

The subsurface environment of the root zone area can set the stae for "do or die" of the turfgrass plant. The good condition of the greens is verified by their physical properties. Therefore, this study was carried to evaluate on the existing green of Hwasan C.C. by undisturbed soil Core Anaysis. We completed the ISTRC SYSTEM BenchMarking of the undisturbed core samples taken from Green #1, Green #5, Green #9-"Best" area, and Green #9-"Stressed" area for the Hwasan C.C.. It was also our understanding that the greens were in "good" to "very good" conditioni. THe exception might be Green #9-"Stress" area, which was the stressed area. The stressed area was confined to a ridge across Green #9. The organic content test results comfirmed the development of organic layering in depth 0-2.5cm. For the amount of compaction in the upper root zones and te development of the green's respective organic layers, the infiltration rates were high in Green #1, Green #5, and Green #9 "Stressed" area. The depicted aerificaton hole might be the probable cause of the relatively high infiltraton rate. Green #9-"Best" area had a tested infiltration rate of 18.75cm/hr. Either this area had not been aerified, or the undisturbed sample did not contain a aerification cavity. The water retention capacity of the undisturbed samples was good. When the greens were first constructed, the original root zone mix had been relatively low water retention properties. And the bulk density and the porosity of the undisturbed samples were good. In the result, all the greens were similar except for the infiltration. Thus, we supposed that Green #9-"Stressed" area might be ainly influenced by the amount of irrigation water and the configuration of the green's surface. There had been a reduction in the amount of irrigation water as the water retention capacity in the greens was promoted. Especially, it had gradually become more of a problem as the green had matured in Green #9-"Stressed" area. Because Green #9-"Stressed" area was a ridge area. The reduction in the amount of irrigation water might be the probable cause of the stress in Green #9-"Stressed" area. Our final observation related to the soil texture and the particle size distribution of the sand. Though and sand contant of all the tested greens were good, the gravel content of them exceeded ISTRC Guidelines. In particle size distribution of the sand, the very coarse and the coarse content of all the tested greens exceeded, but the rest was insufficient. The stability is a function of the material retained on the 0.25mm mesh screen. But, the content of all the tested greens was very insufficient. Though all the greens was serviceable, the coarse root zone sands, such as the sand in the tested greens, tended to be "unstable". Thus, we recommend using a topdressing/aerification sand which should be more in line with ISTRC/USGA Guidelines.;unstable". Thus, we recommend using a topdressing/aerification sand which should be more in line with ISTRC/USGA Guidelines.ines.

• 한방안이비인후피부과학회지
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• 제19권2호
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• pp.130-145
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• 2006

Objectives : The aim of this work is the approaching of properties-flavours theory and the making of morphological standard in Artemisiae herba. Methods : The properties-flavours theory were attempted with bibliographic method and various climate-information. The external-internal morphological standards were determined by using stereoscope and butanol series. Conclusions : The following is a list the conclusion of the approaching of properties-flavours theory and how to make the standard of morphological standard in artemisiae herba. 1. The significant analysis for the artemisiae herba as the properties-flavours theory, is a follow-up survey of the effect written in the official oriental medicine book 2. The other analytic methods according to the gathering time, processing or storing system or especially nature or growth environment(altitude, temperature,. the mean moisture, and the agronomical survey) by way of the explanation of properties-flavours theory appears so many insufficiency at the many cases. 3. In the case of artemisiae herba., there are 2 cases(Artemisia capillaris $T_{HUNB}$ and A. iwayomogi $K_{ITAMURA}$) in current and recently A. aruwa L. is substituted for artemisiae herba in circulation. 4. The external and internal characteristics according to the shape of original plant or herbal states, entirely correspond to all the official oriental medicine boo 5. According to the place of productiot the difference appeals. (1) A. capillatis $T_{HUNB}$. has leaves like a fine thread, and A. iwayomogi $K_{ITAMURA}$ has big and wide leaves, and shows some reddish color, and A. aruwa L. has narrow leaves, its section lines long vertically. (2) In the internal shapes, as the A. capillatis $T_{HUNB}$. leaves', upper epidermal cell wall shows relatively straight form, its all upper- lower epidemical cell wall has a stoma, and calcium rosette crystal is relatively few. As iwayomogi $K_{ITAMURA}$, all upper- lower epidermal cell wall is wavelike concave, and hypodermics has many stoma and many calcium rosette crystal. (3) In the internal shapes of A. aruwa L. the shape of leaves' epidermal cell is irregular and has so many non-glandular hair nad glandular hair on its surface.

• Journal of the Korean Wood Science and Technology
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• 제43권3호
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• pp.355-363
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• 2015

본 연구에서는 초임계 에탄올 및 Ru/C 촉매를 이용하여 초본류 바이오매스 유래 아시안 리그닌을 효과적으로 분해하였으며, 분해 생성된 리그닌오일의 물리화학적 특성을 다양한 분석방법을 이용하여 조사하였다. 리그닌오일의 수율은 반응온도가 $250^{\circ}C$에서 $350^{\circ}C$로 상승함에 따라 89.5 wt%에서 32.1 wt%로 감소하는 경향을 보였지만 분자량 및 다분산지수는 $350^{\circ}C$ 조건에서 아시안 리그닌(3698Da, 2.68) 대비 각각 85%, 44% 감소하여 효과적인 탈중합 반응이 진행되었음을 확인할 수 있었다. 리그닌오일의 GC/MS 분석 결과 guaiacol, 4-ethylphenol, 4-methylguaiacol, syringol, and 4-methysyringol 등 단량체 수준의 페놀화합물은 반응온도가 증가할수록 24.1 mg/g of lignin ($250^{\circ}C$)에서 64.8 mg/g of lignin ($350^{\circ}C$)으로 증가하였으며, 반응기 내부에 수소가스와 촉매(Ru/C)를 첨가하였을 때 최대 76.1 mg/g of lignin 수준까지 향상되는 것을 확인할 수 있었다. 한편 리그닌오일의 원소분석 결과 반응온도가 증가함에 따라 탄소함량은 증가한 반면 산소함량은 점차 감소하였으며, 이를 통해 아시안 리그닌 탈중합 공정 중 수첨탈산소반응 및 수소첨가반응이 진행됨을 간접적으로 확인할 수 있었다.

• 대한본초학회지
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• 제21권2호
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• pp.109-119
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• 2006

Objectives : This study was performed to approach of properties-flavours theory and the study of morphological standard in CORNI FRUCTUS. Methods : The properties-flavours theory were attempted with bibliographic method and various climate-information. The external-internal morphological standards were determined by using stereoscope and butanol series. Results and conclusion : 1. The significant analysis for the corni fructus as the properties-flavours theory, is a follow-up survey of the effect written in the official oriental medicine book. 2. The other analytic methods according to the gathering time, processing or storing system or especially nature or growth environment(altitude, temperature,. the mean moisture, and the agronomical survey) by way of the explanation of properties-flavours theory appears so many insufficiency at the many cases. 3. The external and internal characteristics according to the shape of original plant or herbal states, entirely correspond to all the literature on this subject. 4. According to the place of production, there are some different points. (l) In the external shapes, it is reasonable that if we make the basic standard of classification by the sharpness of color, the existence of gloss and the size of products. In the case of the Korean products, it shows bright and glossy color totally, but in the case of North Korea products, it shows black and lackluster. And in the case of the foreign products, it has softer body than Korea one and shows white color on the surface. (2) In the internal shapes, the Korea products has a thicker cuticle layer than the foreign one, and has fewer ca-oxalate in the parenchyma cell.

• 대한본초학회지
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• 제21권4호
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• pp.213-218
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• 2006

Objectives : Radix Bupleuri is from the dried root of the herb of the Perennial herbaceous plant, Bulpleurum falcatum L. or Bulpleurum chinense DC. or Bulpleurum. scorzonerifolium Willd., family Umbelliferae. Medicinal Properties are bitter and pungent in flavor, slightly cold in nature and attributed to the liver and gallbladder meridians. Actions in modern Materia Medica are regulate the functional relation of internal organs to relieve fever, disperse the stagnated liver-qi and uplift yang-qi to raise sinking. The ‘uplift yang-qi to raise sinking’ efficacy, out of three efficacies (regulate the functional relation of internal organs to relieve fever, disperse the stagnated liver-qi and uplift yang-qi to raise sinking), has been disputed in the medical profession for a long period. Hereupon, this study ascertained the reason why it has been disputed. Methods : With respect to this medicinal herb, the efficacies of regulate the functional relation of internal organs to relieve fever, disperse the stagnated liver-qi and uplift yang-qi to raise sinking were described as to what was written in ‘Shen Nong's Herbal’ from Chin and Han dynasties until Jin and Yuan dynasties. Results : The beginning of Jin and Yuan dynasties, it began to deal with the ‘uplift yang-qi to raise sinking’ efficacy and so it has been carried on modern textbooks and medical books. The reason why it was added is that it was influenced by the theory of ‘Raise Sinking’ advocated by Zhang jieku who lived in the period of Jin and Yuan dynasties. Since then, the properties of ‘Radix Bupleuri’ have been wrongly known to the public. Additionally, ‘Radix Stellariae Seu Gypsophilae’, which was begun to be introduced from the Four Cities since the Five Dynasties, has been combined with the best stuffs of ‘Radix Bupleuri’ produced from Yin Zhou. Consequently, its original properties were remarkably disordered. Likewise, respective medical schools’ theories were changed by the influence of ‘Bulpleurum. scorzonerifolium Willd’ begun to be used since Tang dynasty. Conclusion : it is considered that the current ‘Raise Sinking’ efficacy of Radix Bupleuri is unreasonable to be applied to the efficacy of the whole Radix Bupleuri because it is limited to certain species.

• Ecology and Resilient Infrastructure
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• 제7권1호
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• pp.26-42
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• 2020

토양은 식물들이 뿌리 내려 생태계를 조성할 수 있게 하는 근간이자 인류의 삶의 터전으로, 그 생성에 많은 시간을 필요로 하기 때문에 토양의 보존과 관리가 중요하다. 토양 리질리언스는 다양한 종류의 교란으로부터 토양이 본래의 구조와 기능을 유지하는 능력으로, 불확실성과 예측불가능성이 높은 미래에 대비할 수 있는 연구 분야이다. 따라서 본 연구는 국내에서 아직 널리 알려지지 않은 토양 리질리언스의 개념과 필요성, 그리고 기존에 수행된 국외 연구 내용들을 정리함으로써, 토양리질리언스를 처음 접하는 국내·외 연구자들에게 리질리어스 연구의 진입 문턱 (threshold)을 낮추는데 기여할 것을 목적으로 수행되었다. 본 연구 전반부에는 리질리언스와 토양 리질리언스에 대해 소개하였으며, 후반부에는 많은 토양 리질리언스 선행연구들이 관심을 가진 주요 스트레스 원인을 자연적 요인과 인위적 요인으로 구분하여 정리하였다. 지구상에는 모암, 기후, 인간의 활동, 문화가 모두 동일한 지역은 없기 때문에 각 토양마다 고유의 특수성을 갖고 있다. 따라서 본 연구 결과 활용하고자 하는 연구자는 토양 리질리언스를 도입하고자 하는 지역의 특수성을 고려하여 활용해야 할 것이다. 또한 토양 리질리언스 연구자들의 네트워크를 강화하여 연구결과를 공유하고 적극 활용할 수 있는 기반을 만드는 데 노력해야 할 것이다.

• 한국약용작물학회지
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• 제14권4호
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• pp.217-220
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• 2006

당귀는 타식성 작물로 품종개발과 기본식물의 유지에 많은 노력이 든다. 이러한 요인은 당귀 육종작업을 어렵게 만들고 있다. 따라서 본 연구에서는 참당귀와 일당귀에서 육종작업의 효율성 증진을 위해 화분매개가 가능한 곤충들의 효과에 대해 검토하였다. 당귀에 비래하는 곤충의 대부분은 벌과 파리였으며 그 외의 곤충들로는 나비, 딱정벌레 및 노린재가 있었다. 당귀에 비래하는 곤충의 수는 참당귀에서 월등히 많은 것으로 조사되었다. 화분매개 곤충으로 사용하기 위한 파리의 사육은 소의 허파를 이용하여 비교적 간단하게 할 수 있었다. 참당귀에서 당귀 종자의 결실율은 자연방임구 76.6%, 벌방사구 49.2%, 파리방사구 15.3%, 인공수분구 15.3%로 나타났다. 일당귀에서는 각각 46.9%, 43.6%, 27.9%, 20.3%의 결실율을 나타내었다. 이상의 결과를 종합해 볼 때 자연 방임구를 제외하고는 벌 방사구의 결실율이 가장 높은 것으로 나타났으나, 취급의 간편함과 적은 비용을 감안하면 파리를 이용하는 것이 가장 효율적인 방법으로 판단되었다. 본 연구에서는 파리의 인공적인 사육과 화분매개 효과에 대한 가능성을 확인할 수 있었으며, 이러한 결과들은 앞으로의 당귀 육종작업에 있어서 효율성 증진에 기여할 수 있을 것으로 기대된다.