• 한국산림과학회지
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• 제106권1호
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• pp.26-32
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• 2017

박피한 '대보' 밤을 천연 추출물(녹차, 당귀, 황기, 감초 : 각각 1% 추출물)에 침지 처리한 후 $5{\mu}m$ 두께의 PE+ Nylon재질의 7-layer 필름으로 진공포장하여 $4^{\circ}C$에 저장하면서 저장기간 동안 박피밤의 갈변 및 품질에 미치는 영향을 조사하였다. 갈변도는 무처리구보다 천연 추출물 처리구에서 다소 적게 갈변되었고, 특히 황기와 감초 추출물 처리가 갈변억제에 효과적인 것으로 나타났다. 저장 35일 후 박피밤의 색차(${\Delta}E$)는 무처리구에서 5.6으로 가장 높은 값을 보인 반면, 황기 추출물 처리구에서는 3.4로 가장 낮게 나타났다. 저장기간 동안 천연 추출물 처리는 박피밤의 중량 및 수분감소율과 경도 및 가용성 고형물 함량에 영향을 미치지 않았다. 저장 35일 후 부패율은 무처리구에서 9.0%, 녹차 추출물 처리구에서 9.0%, 당귀 추출물 처리구에서 9.0%, 황기 추출물 처리구에서 21.0%, 감초 추출물 처리구에서 7.0%로 나타났다. 종합적 관능평가에서는 황기 추출물 처리가 향 때문에 가장 낮은 점수를 받았으며, 감초 추출물 처리구가 저장기간 중 가장 우수한 것으로 나타났다. 따라서 박피밤의 천연 추출물 처리는 갈변을 억제시킴으로써 박피밤의 관능적 품질유지에 효과적이였고, 특히 감초 추출물 처리 후 진공포장하는 것이 박피밤의 품질유지와 갈변억제에 가장 효과적인 것으로 판단된다.

• 한국식품저장유통학회지
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• 제4권3호
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• pp.259-264
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• 1997

To improve freshness of onion(Allium cepa), it was packed with various packaging films and stored at 5$^{\circ}C$ until 52 days. During the storage, internal gas composition, weight loss, spout ratio, decay ratio, surface color were determined. The used packaging films are two-perforated LDPE (control), LDPE, CPP/OPP/PE, Nylon/PE and Ag-zirconium filled LDPE. Onions were prepared by peeling or dipping in GFSE(grape fruit seed extract) and packed under vacuum or atmosphere with the selective films. Anaerobic condition was shown in the Nylon/PE package after 4 days and, thus weight loss, sprout ratio and color were considerably poor. All onions in the vacuum package after 15 days were spouted. Onions in CPP/OPP/PE and functional film(Ag-zirconium filled LDPE) package showed aerobic respiration until 52 days. Thus, the quality of onions in these packages was superior to the control.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1978-1979
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• 2007

In this paper, the authors introduce a high-speed microprocessor based on automatic vacuum capacitor switch with a modified digital filter design using distributed arithmetic. The automation trends particularly the automatic vacuum capacitor switch has helped ameliorate the power factor essentials and automatically triggered to close when the line current exceeds rated value. Microprocessor relays use digital filters to extract only the fundamental and attenuate harmonics. To provide optimum speed characteristics a distributed arithmetic based filter design in the microprocessor controller which not only enhances filtering speed but additionally enables lower power consumption at the cost of area has been introduced. The result is a unified description that describes a digital filter structure down to bit level.

• 생약학회지
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• 제33권4호통권131호
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• pp.364-371
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• 2002

Yew (Taxus cuspidata Sibe) selected cultivation as drug, food and decorative plant in Gyong-gi province in Korea. To extract the water soluble active ingredients, as a extracting method, there was extracted with 20g of dried seeds with each 20g of butylene glycol(BG) and propylene glycol(PG), and 40 mL of water mixing 72 hours at $40{\pm}5^{\circ}C$, and then they were filtrated by 400 mesh. Appearance of extract of seeds was pale brown, $pH=4.5{\pm}0.5$, $gravity=1.013{\pm}0.05$, a reflective $index=1.373{\pm}0.05$, and yield=75%. Also, to extract the high purity oil from seeds, it minutely pulverized the dried seeds and added the hexane, mixing 2 hours at $20{\pm}57^{\circ}C$. And then, this filtrated it with 400-mesh. It got the purified oil through evaporating them at $55^{\circ}C$ during under vacuum. As the results, appearance was slightly brown, gravity=0.922 acid value=0.12, saponification value=192, and it should be obtained the $40{\pm}5%$ of yield. As the efficacy evalution of cosmetic field, the antioxidative activities by NBT method were stronger 86.0% from extract of talus seeds than 52.0% from green tea extract and 35.0% from skullcap extract as well as the antioxidative activities by DPPH method were stronger 93.7% from extract of seed than 60.3% from extract of green tea and 27.1% from extract of skullcap. These are more effective than other plant extracts. The collagen synthesis rate on the activating fibroblast for Taxus cuspidata Sibe extract showed 35.43%. As the activity of the skin elasticity, PPE(porcine pancreatic elastase)-inhibitory activities of talus extract was 50.8%. Anti-inflammatory activity was more effective to be taken 41.1% of taxus seed oil than 24.2% of steady glycyrrhetinate (SG) as a control.

• Natural Product Sciences
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• 제9권2호
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• pp.91-92
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• 2003

The present investigation was carried out to evaluate the antinociceptive and sedative - hypnotic effect of a vacuum dried methanol extract of aerial parts of Artemisia pallens. In the tail-flick method with Swiss albino mice the methanol extract at the doses of (1500 mg/kg, 2000 mg/kg, and 2500 mg/kg) showed significant antinociceptive activity. Significant potentiation of Pentobarbitone sodium - induced sleeping time was observed in mice on co-administration of the various doses of the methanol extract of Artemisia pallens.

• 한국식품영양과학회지
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• 제27권4호
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• pp.574-584
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• 1998

Antimicrobial activities, extraction yields and chemical compositions of the extract from the powder of vacuum dried Smilax china root on various solvents were investigated. Antimicrobial activities against. A rhizogenes, A. tumefaciens, C. utilis, S. cerevisiae, B. megaterium, B. subtilis and E. coli were measured by disc diffusion method. Methanol, chloroform, ethylacetate and butanol extracts exhibited potent antimicrobial activities against B. megaterium and B. subtilis. Also, methanol, ethylacetate and butanol extracts had the activities against A. rhizogenes, and chloroform and ethylacetate extracts against A. tumefacciens. The extraction yields were 13.10%, 8.71%, 2.73%, 0.83%, 0.54% and chemical compositions of their extracts were very different according to the kinds of solvents. The main chemical groups of ethylacetate, methanol, chloroform and butanol extracts were 45.99% phenolics, 36.10% acids, 29.13% phenolics and 18.96% phenolics, respectively.

• 한국식품과학회지
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• 제29권3호
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• pp.492-496
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• 1997

자색고구마 색소추출액을 막분리법과 진공농축법을 사용하여 농축하였다. 초기 anthocyanin함량이 1.6 g/L인 색소추출액을 막분리법을 이용하여 5시간 동안 연속 농축시켜 부피의 비로 25배 농축시켰으며, 이 때 조색소의 함량은 10.7 g/L이었다. 농축이 진행되는 동안 고형분의 농도는 계속 증가하였으며, frux는 계속 감소하였다. 막분리에 의한 색소 추출액의 농축과정 중 degradation index (DI)의 변화는 미미하였는데, 이는 이 농축방법이 색소의 변색에 아무 영향을 미치지 않음을 의미한다. 비교실험으로서 진공농축법을 사용하여 부피의 비가 5배로 농축될 때까지 농축하였다. DI값은 $40^{\circ}C$보다 $60^{\circ}C$에서 더 증가하는 경향을 나타냈다. 농축색소액의 total color difference값은 막분리법을 사용하는 경우 그 변화가 미미하였으며, 진공농축법을 사용했을 때에는 $40^{\circ}C$보다 $60^{\circ}C$농축에서 더 증가하였다. 이러한 사실들을 자색고구마색소 추출액을 농축시키는데 낮은 온도의 진공농축법이 효과적이며 ethanol및 citric acid의 재사용 등 경제적인 면으로는 막분리법이 효율적인 방법임을 입증한다.

• 생명과학회지
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• 제8권6호
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• pp.648-653
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• 1998

1. 포장 또는 비포장의 부패된 어육연제품에서 분리된 미생물의 대부분(약 98%)은 Bacillus속을 비롯한 세균류였다. 특히 비포장어묵제품에서는 곰팡이도 약 0.1%검출되었다. 이들 부패미생물에 대한 계피추출물의 최저증식억제농도는 세균과 곰팡이에 대하여 각각 160~640$\mu\textrm{g}$/$m\ell$과 40~80$\mu\textrm{g}$/$m\ell$으로 나타났다. 2. 흰살어묵의 원료 배합시 계피추출물을 0.5% 첨가하면 첨가하지 않은 것에 비하여 $25^{\circ}C$에서 보존기간이 2일 연장되었다. 또한, 계피추출물과 ethanol을 1 : 3으로 혼합한 액을 튀김어묵표면에 분무한 것은 ethanol만 분무한 대조구에 비하여 곰팡이 발육이 2일간 지연되었다. 3. 샌드위치와 찹쌀떡의 표면에 계피추출물과 ethanol을 1 : 1 비율로 혼합한 액을 분무하여 $25^{\circ}C$에서 저장하면 곰팡이 발육이 대조구에 비하여 보존기간이 각각 5일과 7일정도 연장되었다.

• 대한가정학회지
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• 제41권2호
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• pp.107-121
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• 2003

This study was discussed the dyeing of wool and nylon fabrics with Chinese Scholar Tree extract. The extracts of Chinese Scholar Tree was prepared in the condition of heating at $95{\pm}5C$, for 1 hour and cooling to 40C. And then the extracts of color matter treate with vacuum concentration at $60{\pm}2^{\circ}C$, 30mmHg and dried with spray dryer. The dyeing of wool and nylon fabric in this experiment was also employed the mordant dyeing method such as pre-mordant, post-mordant and simultaneous mordant method. The mordanting agents used in this study were as followings ; aluminium potassium sulfate, copper(II) acetate monohydrate, chromium potassium sulfate$.$$7H_2O$, Tin(II) chloride dihydrate, iron(II)sulfate $7H_2O$. For an evaluation of the dyeing property of the mordanting agents, the pre-mordant method, the repeat dyeing and the fastness of the light, dry cleaning, washing and rubbing measured respectively. From the results of the dye absorption, the optimum dyeing condition of the wool and nylon fabrics with Chinese Scholar Tree extract is at 80C dyeing temperature for 60 minutes. The optimum concentration of mordanting agent is Al, Cr, Sn 1%, Fe, Cu 2% solution. In general, the fastness property of the dyed wool and nylon fabrics had a comparatively high grade.

• 동의생리병리학회지
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• 제22권3호
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• pp.654-659
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• 2008

To confirm possibility of Nelumbo nucifera leaves as biofunctional material, we investigated the antioxidant activity and nitrite scavenging ability of ethanol extract from Nelumbo nucifera leaves. Nelumbo nucifera leaves were extracted with ethanol and concentrated under vacuum using rotary evaporator. Then, antioxidative activity and nitrite scavenging ability of the extract were examined in vitro. Electron -donating ability of the extract at RC50 was 90.19 ${\mu}g/mL$. After addition of 0.96 mg/mL, autooxidation of pyrogallol decreased to 66.19% by superoxide dismutase-like activity. In antioxidative activity of the extract against linoleic acid during incubation times of 24, 48, and 96 hours at $40^{\circ}C$, lipid peroxidation values significantly decreased to 72.53%, 82.00%, 84.69% with addition of 0.2 mg/mL, respectively. Total phenolic content was determined as gallic acid equivalents (GAE) and the value revealed to be $282.84\;{\pm}\;9.03$ GAE ${\mu}g/mg$ of the extract. Nitrite scavenging ability showed the most remarkable effect at pH 1.2, exhibited to 45.55% by addition of 0.2 mg/mL. These results suggest that ethanol extract from N. nucifera leaves can be used as bioactive and functional material.