• Applied Biological Chemistry
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• 제32권4호
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• pp.338-343
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• 1989

더덕뿌리의 향기성분을 분석코저 SDE법에 의해 휘발성정유성분을 분리한 다음 GC 및 GC-MS에 의해 성분을 확인한 결과 terpene 및 terpene alcohol류 16종, hydrocarbon류 13종, alcohol류 5종, aldehyde 및 ketone류 6종, acid류 6종, ester류 2종 및 기타 2종 등 총 50개 성분이 확인되었다. 그중 n-hexanal(7.3%), trans-2-hexenal (24.9%), n-hexanol(19.8%), cis-3-hexen-1-ol (5.6%) 및 trans-2-hexen-1-ol(29.4%)이 전체 성분의 85.0%를 차지하였으며, 관능평가에 있어서도 이와 같은 5종의 $C_6$ 화합물들이 더덕의 특징적인 향기와 밀접한 관련이 있는 것으로 추정되었다.

• Applied Biological Chemistry
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• 제40권1호
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• pp.48-52
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• 1997

다양한 가공 적성을 갖는 변성 전분을 토마토 케찹의 제조에 첨가하여 변성 전분의 종류 및 첨가량이 토마토 케찹의 유동 특성, 층분리 및 관능적 성질에 미치는 영향에 관하여 조사하였다. 케찹을 Herschel-Bulkley계 유체로 간주하여 분석한 결과 항복응력와 점조도지수는 ADA(acetylate distarch adipate)>SA(starch acetate)>HDP(hydroxypropyl distarch phosphate)>RCS(raw corn starch)>NS(no starch)의 순으로 크게 나타났으며 거동유동지수는 SA와 HDP의 경우 첨가량에 관계없이 거의 일정하였으나 ADA와 RCS는 첨가량이 증가할 수록 감소하는 경향을 보였다. 원심분리에 의한 층분리 검사에서는 ADA>SA>HDP>RCS>NS의 순으로 층분리가 방지되는 안정성을 나타냈다. 관능검사 결과 전반적으로 ADA(2%)>SA(2%)>RCS(2%)>NS>HDP(2%)의 순으로 기호도가 높게 나타났다.

• Journal of Korean Biological Nursing Science
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• 제14권1호
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• pp.57-65
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• 2012

Purpose: The purposes of this study were to identify the effect of music therapy on the physiologic index, anxiety and dyspnea of patients who are weaning from mechanical ventilators, and to compare the effects between western and Korean traditional music. Methods: The research format is repeated measures design. The subject group consisted of 21 patients being weaned from mechanical ventilators in a tertiary general hospital in Seoul. Each patient randomly received western music, rest, and Korean traditional music. Western and Korean traditional music were played on an MP3 head phone for 30 minutes. Patients get 30 minutes of rest between the 2 music styles and the rest period. Physiological indices, anxiety and dyspnea were measured before and after patients listened to both styles of music and the rest period. Anxiety and dyspnea were measured with a visual analogue scale. Results: Respiratory rates (RR), rapid shallow breath indexes (RSBI), anxiety and dyspnea decreased, and tidal volume (TV) increased after listening to Western and Korean tradition music in patients weaning from mechanical ventilators. Compared to western music, Korean traditional music yielded significant decreases in RR, RSBI, anxiety and dyspnea, and an increase of TV. Conclusion: Western and Korean traditional music would decrease RR, RSBI, anxiety and dyspnea and increase TV of patients who are weaning from mechanical ventilators. The effects are more pronounced in patients listening to Korean traditional music compared to western music.

• Applied Biological Chemistry
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• 제48권3호
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• pp.252-257
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• 2005

새로운 2-(4-(6-chloro-2-benzoxazolyloxy)phenoxy)-N-phenylpropionamide 유도체들의 구조 변화에 따른 발아 전, 논피(Echinochloa crus-galli)에 대한 제초활성과의 3D-QSAR 관계를 상이한 정렬방법에 따라 비교 분자장 분석(CoMFA)과 비교분자 유사성 지수분석(CoMSIA) 방법으로 연구하였다. 가장 양호한 3D-QSAR 모델은 atom based fit 정렬과 CoMFA장과 CoMSIA장의 조합 조건에서 유도된 CoMFA 모델(AI-2)과 CoMSIA 모델(AII-4)이었다. CoMFA 및 CoMSIA 등고도로부터 제초활성은 N-phenyl 고리 상 치환기의 구조변화로 개선될 수 있었다.

• Applied Biological Chemistry
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• 제51권3호
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• pp.219-222
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• 2008

제3세대 제초성 cyclic imide 유도체를 탐색하기 위하여 peroxidizing 제초제로써 40개의 1-(4-chloro-2-fluoro-5-pro-pargyloxypheny)-3-thiourea 유도체(1-40) 중, 3-R-치환체의 발아 전 벼(Oryza sativa)와 논피(Echinochlo crusglli)에 대한 평균 제초활성 값들을 제시하였다. 그리고 Urea 유도체(1-40)와 protox 효소의 기질분자인 protogen사이의 분자구조 유사성을 검토하였다. 논피에 대하여 선택성을 나타내는 화합물은 diallyl-치환체(20)와 3-nitro-치환체(33)이었으며 allyl-치환체(8)가 가장 큰 제초활성$(pI_{50}=4.71)$과 유사성 지수(S=0.81) 값을 나타내었다. 그리고 aryl-치환체(21-40)와 Protogen 사이의 중첩된 부피(C)와 S값 사이에 상관성이 좋았다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 1997년도 총회 및 춘계 학술발표회 논문집
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• pp.8-11
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• 1997

Current methods of evaluating soil contamination by heavy metals rely on analyzing samples for total contents of metals or quantities recovered in various chemical extracting solutions. Results from these approaches provide only an index for evaluation because these methodologies yield values not directly related to bioavailability of soil-borne metals. In addition, even though concentrations of metals may be less than those required to cause toxic effects to biota, they may cause substantial effects on soil chemical parameters that determine soil quality and sustainable productivity. The objective of this research was to characterize effects of Cu or Cd additions on soil solution chemistry of soil quality indices, such as pH, EC, nutrient cation distribution and quantity/intensity relations (buffer capacity). Metals were added at rates ranging from 0 to 400 mg/kg of soil. Soil solution was sequentially extracted from saturated pastes using vacuum. Concentrations of Cu or Cd remaining in soil solutions were very low as compared to those added to the soils, warranting that most of the added metals were recovered as nonavailable (strongly adsorbed) fractions. Adsorption of the added metals released cations into soil solution causing increases of soluble cation contents and thus ionic strength of soil solution. At metal additions of 200~400 mg/kg, EC of soil solution increased to as much as 2~4 dS/m; salinity levels considered high enough to cause detrimental effects on plant production. More divalent cations (Ca+Mg) than monovalent cations (K+Na) were exchanged by Cu or Cd adsorption. The loss of exchangeable nutrient cations decreased long-term nutrient supplying capacity or each soil. At 100 mg/kg or metal loading, the buffering capacity was decreased by 60%. pH of soil solution decreased linearly with increasing metal loading rates, with a decrement of up to 1.3 units at 400 mg Cu/kg addition. Influences of Cu on each of these soil quality parameters were consistently greater than those of Cd. These effects were of a detrimental nature and large enough in most cases to significantly impact soil productivity. It is clear that new protocols are needed for evaluating potential effects of heavy metal loading of soils.

• Journal of Korean Biological Nursing Science
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• 제16권1호
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• pp.8-16
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• 2014

Purpose: This study determined the effect of inter dental brush education on the dental plaque index, and the degree of halitosis for elementary school students. Methods: The study was performed on a non-equivalent control group, with a pre-test and post-test design. The study was intended for a total of 50 students. They were divided into two groups; an experimental group of 25 students and a control group of 25 students. The experimental group participated in inter dental brush education. The education took about 20 minutes, and was provided once a week, for a total of three weeks. To quantify the effect, the two groups were compared in terms of the dental plaque index and the degree of halitosis. Results: Without inter dental brush education, or a test for homogeneity, in the sense of exact equivalence of the dental plaque index and the degree of halitosis between the experimental and the control group, was supported. (p>.799, p>.876). 1) The first hypothesis, "The experimental group, who participated in inter dental brush education, would reveal a lower dental plaque indices than the control group", was supported (t=5.78, p<.001). 2) The second hypothesis, "The experimental group, who participated in inter dental brush education, would reveal a lower degrees of halitosis than the control group", was supported (t=4.49, p<.001). Conclusion: The proposed inter dental brush education is effective in improving the dental plaque index and the degree of halitosis for elementary school students.

• 생태와환경
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• 제37권4호통권109호
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• pp.373-377
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• 2004

France에서는 국가적 차원에서 지난 1994년부터 수역관리청 (French Water Agencies : Seine, Rhone-Mediterranee-Corse, Artois-Picardie, Rhin-Meuse and Adour-Garonne)과 연합한 농공환경연구소(CEMAGREF)의 주도로 France 영토 (France본토 및 부속 도서에 해외 영토가 지구상에 걸쳐 존재함) 내에서 신뢰도를 가지고 간단히 이용할 수 있는 수질감시망 방법론으로 실용적인 규조류 지수 (Indice Biologique Diatomees)를 만들기로 하였다. 물론 이전인 1970년대부터 Seine강 수역관리청에서 규조류 지수를 이용하기 시작하였고, 1990년대부터 다른 5개 수역관리청에서도 도입한 바가 있다. 이 후 1995년에 최초의 지수를 공표하였고, 지속적이고 정기적인 자료원의 최신화와 보강을 거듭하여 1996년에 최초로 6대 수역관리청에서 적용하였으며 1998년에는 미비한 자료를 완결시키고 기존의 프로그램을 재검토하여 2000년 6월에 표준화된 3번째 판인 IBD가 만들어졌다. 이 방법론은 France의 표준화법인 AFNOR에 NF T90-354로 출간되어 범용화단계를 시작하였다.

• Ecology and Resilient Infrastructure
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• 제5권3호
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• pp.145-155
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• 2018

In a monsoonal climate, the soil seed bank can play an important role in plant regeneration after the severe annual floods that disturb above-ground vegetation within the riparian zone. To investigate the relationship between the soil seed bank and vegetation, we measured the species composition of the soil seed bank and the extant above-ground vegetation in six major plant communities (Artemisia selengensis, Miscanthus sacchariflorus, Persicaria nodosa, Phalaris arundinacea, Phragmites japonica, and Rorippa palustris) in the Cheongmicheon Stream, Korea. A total of 21 species germinated from the floodplain soil seed banks. The most diverse seed bank (21 species) was found in the A. selengensis community, wheres the lowest number of species was found in the R. palustris community (2 species). Most soil seed banks were composed of annuals (90%), exceptions being Rumex crispus and Artemisia princeps, which are perennial ruderals. The similarity of species composition between the soil seed bank and above-ground vegetation was low with Sorensen's similarity indices averaging 29% (range 12 - 42%). Crucially, existing dominant perennials of the extant vegetation including A. selengensis, M. sacchariflorus, P. japonica and P. arundinacea were absent from the soil seed bank. In conclusion, the soil seed banks of the floodplains of the Cheongmicheon Stream were mainly composed of viable seeds of ruderal plants, which could germinate rapidly after severe flood disturbance. The soil seed bank may, therefore, be useful for the restoration of the early succession stages of riparian vegetation after flood disturbances.

• Applied Biological Chemistry
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• 제26권1호
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• pp.58-64
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• 1983

$28^{\circ}C$에서 자란 $3{\sim}4$엽기 벼잎조직의 인지질지방산분석을 통해 벼품종별 상대적내냉성정도와 인지질지방산조성간에 성립되는 밀접한 상관관계를 확인하였다. 즉 내냉성이 강한 품종일수록 불포화도 및 불포화지방산의 구성비가 노은 인지질을 함유하고 있다. 인지질의 불포화상태를 나타내는 모든 지표들이 각품종의 냉해저항성과 잘 일치된다는 사실은, 곧 식물세포가 저온에서 생체막과 관련된 생리적활성을 유지하는데 있어서 필수조건으로 알려진 '생체막의 유동성'은 인지질지방산조성에 의해 절대적으로 지배받는다는 것을 분명히 나타낸다. 한편 벼의 인지질은 최소한 유묘기의 잎에서는 모든 품종에서 공히 phosphatidyl serine과 phosphatidyl choline을 주성분으로 phosphatidyl inositol을 부성분으로, 그밖에 3종의 미량성분을 포함하고 있으며, 인지질의 종류 및 조성은 내냉성과 무관한 것으로 판단된다.