• 대한본초학회지
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• 제24권4호
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• pp.63-67
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• 2009

Objectives : Quality control for imported medicinal herbs is duty for regulation, however to the best of our knowledge there has been no report regarding quality control of imported ones. Therefore, this study investigated the data of imported ones for monitoring quality issue. Methods : These data are categorized according to item, the amount of import, country, inspection item, suitability, and incongruity reason based on the 248 results performed by KIOM. Results : China is the number one country for import with the value of 73%. Inspected medicinal herbs were 139 species, among them Poria is ranked as top for requested number and the amount of import. The amount of import is similar between high ranking 20 species and low ranking 119 ones, showing high ranking ones are major. The incongruity ratio was 7.7% from the total number of inspected items, the reason for incongruity was excess of tolerable amount of Cd residue. Conclusions : From the data, it is effective way to focus on high ranking herbs for evaluating imported herbs for quality control. The study of mechanism on Cd accumulation and its decrease is essential for environmental matter. And identification and storage for mixed used and easily decomposable herbs are remained for further study. Our study might be small step for showing guideline for proper quality control.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.317-318
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• 2023

This study is part of the carbonation degree DB accumulation through quantitative analysis of carbonation depth, Ca(OH)₂ and CO₂ according to the type of finish and years of use of old concrete structures in order to predict the amount of CO₂ that can be absorbed through carbonation of concrete. To this end, the depth of carbonation of the concrete core specimen is measured using an indicator, and the dry amount of water combined with CO₂ in the sample is measured using a differential thermal gravimetric analyzer for samples in the carbonation area and non-carbonated area classified by the indicator, and the absorption compared to the weight of the sample. The amount of absorbed CO₂ was calculated. In addition, the degree of carbonation was calculated through quantitative comparison of Ca(OH)₂ in the carbonation section and non-carbonation section. In the future, we will continue to add the survey and analysis data of dismantled structures and use them as basic data for estimating the amount of carbon dioxide that can be absorbed according to the exposure conditions and years of use by concrete mix.

• 한국식품영양과학회지
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• 제42권1호
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• pp.26-32
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• 2013

본 연구는 마우스에 고지방식이로 비만을 유도하면서 핑거루트 추출물(BPE)의 비만 억제 효과를 평가하는 것이었다. C57BL/6J 마우스를 두개의 실험군으로 나누어 8주 동안 각각 고지방식이와 고지방식이에 0.5%의 BPE를 보충한 식이를 급여하였다. BPE는 식이섭취량에는 영향을 주지 않으면서도 고지방식이군과 비교하여 유의적으로 체중증가를 줄이고, 내장지방의 축적을 억제하였다. 또한 BPE를 급여한 군은 고지방식이군과 비교하여 혈중 지질, 간지질의 축적, 혈중 렙틴 농도를 감소시켰다. RT-PCR 분석 결과, 부고환지방내에서의 $C/EBP{\alpha}$와 $PPAR{\gamma}2$의 발현수준이 고지방식이 대비 각각 1.30배와 1.16배 증가하였다. 결론적으로 BPE는 고지방식이로 유도된 비만 마우스 모델에서 내장지방의 축적을 감소시키고, 이상지질혈증 개선을 통해 항비만 효과를 나타내는 것으로 판단된다.

• 원예과학기술지
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• 제29권5호
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• pp.413-419
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• 2011

국내 자생 수생식물인 노랑꽃창포와 창포를 수질 내 카드뮴(Cd) 제거용 식물재료로 이용하고자 Cd 축적과 내성을 조사하였다. Cd 농도에 따른 치사율을 근거로 Cd에 대한 반수치사량($LD_{50}$)을 계산한 결과, 노랑꽃창포는 $78.5{\mu}M$, 창포는 $47.6{\mu}M$로 나타났다. Cd 스트레스에 대해 노랑꽃창포에서는 POD와 SOD, 창포에서는 CAT와 SOD, 폴리페놀이 활성화되었다. 노랑꽃창포에서는 폴리페놀이 측정되지 않았다. 노랑꽃창포와 창포 모두 Cd 처리 농도가 증가하고 기간이 길어질수록 식물체 내 Cd 축적량이 증가하였고, 두 종 모두 지상부보다는 지하부 축적량이 현저하게 많았다. 지상부에 축적된 Cd 함량은 노랑꽃창포 $548.1mg{\cdot}kg^{-1}$(지하부 축적 대비 82.1%) 창포 $121.4mg{\cdot}kg^{-1}$(지하부 축적 대비 13.7%)로 두 종 모두 Cd 고축적식물로 확인되었으며, 특히 노랑꽃 창포가 Cd 축적능력과 내성이 우수하였다.

• 한국식품저장유통학회지
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• 제19권3호
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• pp.455-461
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• 2012

본 연구에서는 잔가시 모자반 추출물의 항비만 및 항산화 효과를 연구하기 위하여 3T3-L1 전지방세포에 분화 유도물질을 처리하여 분화 과정 중에 잔가시 모자반의 지방축적과 ROS 생성 억제 효과를 관찰하였다. 잔가시 모자반 추출물은 XTT assay에서 두 농도(10 및 100 ${\mu}g/mL$) 모두에서 세포 독성을 보이지 않았다. 지방세포 분화 중 세포 내 지방축적 및 ROS 생성량을 비교한 결과, 잔가시 모자반 추출물을 처리한 지방세포의 경우 지방축적량과 ROS 생성량 모두 유의적으로 억제되는 것으로 나타났다. 특히 잔가시 모자반 추출물을 처리함으로써 지방세포 분화와 관련된 전사인자인 $PPAR{\gamma}$와 $C/EBP{\alpha}$ 발현을 유의적으로 감소시켰으며, ROS의 생성과 관련이 있는 주요 효소인 NOX4의 발현 또한 유의적으로 감소하였다. 이 결과를 통해 잔가시 모자반 추출물이 3T3-L1 지방세포 내 중성지방의 축적 억제 효과와 더불어 ROS 생성 억제에 효과적으로 작용함을 확인하였다. 따라서 잔가시 모자반은 비만과 같이 대사증후군 관련 질환의 개선을 위한 천연물 기능성 소재로의 활용이 기대된다.

• 한국환경보건학회지
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• 제20권3호
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• pp.85-95
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• 1994

This study was performed to find out the detoxication effects of natural products Thuja orientalis, leaf of acorn, aloe ferox mill, pine cone, pine root, lonicerae flos on nickel toxicity. The experimental rats were divided into 3 groups such as nickel alone treatment group, natural products treatment groups before and after nickel treatments. Each group was administered with difference dose of nickel such as 6.6 mg/kg/day, 13.2 mg/kg/day, 19.8 mg/kg/day respectively, for 14 days. Natural products were administered by 400 mg per kilogram body weight rat per day. The weight change of rats, nickel concentration in organs, survival rate of rats, morphology of organs were observed in the experimental groups. The results obtained by the experiment were as follows: 1. The rats in the group treated with natural products had no effect on the weight gain. 2. The mean survival rate of rats in the nickel alone treatment group was 72.5% (6.6 mg/kg/day), 68.9% (13.2 mg/kg/day), 60.2% (19.8 mg/kg/day) respectively. 3. As for the amount of nickel accumulation in organs, it was the lowest amount treated with pine cone, pine root in that order. 4. When kidney and liver tissues were observed with as optical microscope, obvious change were visible in those tissues treated groups with Lonicerae and Aloe.

• 폴리머
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• 제26권3호
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• pp.300-306
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• 2002

본 연구에서는 세포접착성에 관한 영향을 검토하기 위하여 L-malic acid (L-MA)와 glycolic acid (GA)의 복합단위로 된 3-(S)-[(dodecyloxycarbonyl)methyl] -1,4-dioxane-2,5-dione (DMD)의 합성 및 DMD와 L-lactide의 공중합을 촉매로서 tin (II) octanoate를 사용하여 행하였다. 얻어진 공중합체를 필름으로 제작하여 RGD고정화를 실시한 결과, 필름표면에 세포접착성 펩티드를 고정화할 수 있었고, MA단위의 도입량의 증가에 따라 RGD의 고정화량이 증가하는 것을 확인하였으며, glycolic acid-$\beta$-dodecylmalate-lactic acid (D-PGML)는 서서히 분해되어 장기간에 있어 잔류 및 축적이 발생하지 않아 생체재료로서 크게 기대된다.

• Applied Biological Chemistry
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• 제33권1호
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• pp.87-92
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• 1990

Ergosterol을 생산하기 위하여 Saccharomyces sake KBA No. 6가 사용되었으며 ergosterol축적에 관여하는 각종 요인들이 검토되었다. 가장 효율적인 무기 질소원은 ammonium chloride이었으며, C/N 비율이 200/l이었을 경우 3.5%의 ergosterol이 세포 내에 축적되었다. Tween 80 0.2 %와 potassium nitrite 0.1 %를 동시에 사용하였을 경우, ergosterol 함량(%) 과 총 ergosterol량(mg/L)은 각각 56 %와 45% 증가하였다. 최적조건에서 ergosterol 함량은 1.73%에서 5.3%로 증가하였으며, 총 ergosterol량은 65.2 mg/L에서 135.15 mg/L로 증가하였다.

• 설비공학논문집
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• 제10권6호
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• pp.649-657
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• 1998

In this study, the effects of the various conditions of frosting and defrosting on the behavior of defrosting in a fin-tube heat exchanger have been examined experimentally. The electric heater is used for defrosting in a fin-tube heat exchanger It is shown that there are several local maxima in the water draining rate. The amount of residual water on the heat exchanger after the completion of defrosting is kept constant due to surface tension on the heat exchanger. Without considering the degradation of the thermal performance due to the frosting, the defrosting efficiency is improved with increasing amount of the frost irrespective of the frosting condition. The defrosting behavior is affected by the frosting density as well as the frost accumulation, which vary with the experimental operating conditions during the frosting period. The heat loss to the surrounding air decreases, and the melting and defrosting efficiencies show high values with decreasing heat input.

• The Korean Journal of Ecology
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• 제10권4호
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• pp.195-204
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• 1987

Pollen analysis of moor peat of Daeam Mountain revealed vegetational history around Daeam Mountain. The pollen stratigraphy might be zoned into three, Zone I, Zone II and Zone III for the past 2, 200 years. The time required for amount of the accumulated peat in the moor was estimated in terms of the balance of the accumulation and decay of organic carbon of the deposit peat. Zone I(770~2, 200 yr BP) had Pinus and Quercus as main elements. Gramineae decreased while Typhaceae, Cyperaceae and spores such as Polypodiaceae increased. Zone II(300~770 yr BP) showed warming trend which is suggested by high pollen concentrations of Quercus, Juglans, Carpinus, Ulmus and by a more diverse flora of deciduous borad-leaved trees than Zone I. Pinus decreased in this zone. It suggests that the overall environment became milder than Zones I and III. Zone III(earlier than 300 yt BP) was predominantly Quercu and Pinus with amount of nonarboreal species such as Artemisia, Gramineae and Chenopodiaceae, that was grown under dry conditions. It suggests that overall environment vecome humid by comparison with the present time and it is surmised the course of boggy ground formation by a retrogressive succession.