• 한국식품과학회지
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• 제49권5호
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• pp.486-493
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• 2017

본 연구는 '2015 우리술 품평회'에 본선 진출한 증류 소주 7종의 이화학적, 관능적 특성을 도출하여 입상주와 비입상주 간의 차이를 비교하고자 하였다. 입상주 4종, 비입상주 3종으로 총 7종의 증류 소주를 사용하였으며, 이화학적 특성의 경우 입상주에서 알코올 함량(38.4%), pH(3.96)가 유의적으로 낮게 나타났다. 관능적 특성 도출을 위하여 묘사분석을 실시한 결과, 입상주의 경우 쓴맛, 후미쓴맛, 고소한향, 아세톤향, 청주향/향미, 간장향미, 전반맛 강도가 강하게 발현되었다. 소비자 기호도 조사 결과, 입상주보다 비입상주의 기호도가 더 높게 평가되었는데 이는 소비자들이 평소에 접하던 희석 소주와 비슷한 알코올 함량(17-18%)을 가지는 시료에 더 높은 점수를 준 것으로 판단된다. 본 연구결과를 통해 국내 시판 증류 소주의 이화학적 특성과 관능적 특성, 그리고 소비자 기호도 조사의 결과까지 고려한다면 향후 신제품 개발 및 품질 향상에 도움이 될 것이라 판단된다.

• 한국식품과학회지
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• 제49권4호
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• pp.383-389
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• 2017

본 연구는 우리나라 전통 증류식 소주 제조를 위한 최적의 효모를 선발하는 데 목적을 두고 누룩에서 분리한 효모와 시판 소주효모의 발효 및 증류 특성을 비교 분석하였다. 분리한 4개의 균주(Y88-4, Y98-4, Y172-6, Y192-4)와 대조구로 사용한 시판 소주효모 2종(C1, C2)은 Saccharomyces cerevisiae로 동정되었다. 발효액의 최종 알코올 함량은 $13.9{\pm}0.1-16.4{\pm}0.01%$로 C1효모가 가장 높은 알코올 함량을 나타냈고 6개의 실험구의 pH와 총산의 함량은 각각 pH 3.9-4.0, 0.40-0.52 g/100 mL로 정상적인 발효가 진행된 것으로 판단되며 아미노산 함량은 초기 0.10-0.12 g/100 mL에서 발효가 진행됨에 따라 대체로 증가하여 0.26-0.30 g/10 0mL로 나타났다. 유기산의 변화는 옥살산의 경우 Y98-4와 C2에서 발효 말 각각 $0.27{\pm}0.02$, $0.28{\pm}0.03mg/mL$ 검출되었고 말산은 Y88-4를 제외한 모든 실험구 및 대조군에서 최종 발효 시 $0.22{\pm}0.23-0.49{\pm}0.02mg/mL$로 나타났다. 젖산은 C2효모가 발효 말 $0.56{\pm}0.03mg/mL$로 가장 높게 나타났고, 발효과정 중 주요 유기산으로 감칠맛과 관련 있는 석신산은 C2효모가 발효 말 $1.23{\pm}0.12mg/mL$로 가장 높았다. 발효액의 품질저하와 관련 있는 아세트산은 소주효모 C1과 C2에서 각각 $1.87{\pm}0.00$, $1.64{\pm}0.12mg/mL$로 다른 효모에 비해 높게 나타났다. 증류액의 휘발성 향기성분분석 결과 37개의 휘발 성분이 확인되었고 작용기별로 분류 하면 알코올류 7종, 에스터류 26종, 산류 1종, 기타 3종이었다. 높은 area%를 나타낸 것은 에틸알코올, 카프릴산에틸, 아밀알코올 등이다. 증류액의 향기호도 조사결과 Y88-4>C2>Y98-4>C1>Y172-6>Y192-4 순으로 나타났다. 효모의 특성조사를 통해 풍부한 휘발성 성분을 함유하고 있으며 향기호도 조사에서 가장 높은 선호도를 보인 Y88-4가 증류식 소주 제조에 적합한 효모라고 판단된다.

• 한국산업보건학회지
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• 제25권1호
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• pp.82-88
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• 2015

Objectives: This study is designed to analyze the penetration performance into ceiling materials containing asbestos of scattering prevention agents and investigate the change in penetration depth and viscosity according to the dilution rate of anti-scattering agents diluted with distilled water. Methods: Five different types of scattering prevention agents were spread on plate-type asbestos ceiling materials. The penetration depth of each coated ceiling material was measured by energy dispersive spectroscopy (EDS) analysis, based on X-ray fluorescence (XRF) results of the non-coated ceiling materials. Test equipment installed the ceiling materials and 60 minutes were collected at a flow rate of $10{\ell}/min$ at a filter of 25 mm. Results: An EDS analysis of the cross-section of ceiling materials constructed with a scattering prevention agent revealed that potassium is detected in the process of penetrating hardener solidification and this element could be an indicator for infiltration. When anti-scattering agents with different viscosities were constructed and the penetration depth was analyzed by potassium detection assessment using EDS, the depth results with viscosities of 5.0, 2.5, and 1.9 cP were 98.5, 103, and $147{\mu}m$, respectively. Penetration performance improved with decrease in viscosity. Conclusions: For asbestos ceiling materials, it is concluded that a higher dilution rate of the scattering prevention agent leads to lower viscosity, and hence a deeper penetration depth from $156{\mu}m$ to 3 mm. The asbestos anti-scattering properties according to the penetration depth will be confirmed through further study.

• 한국환경과학회지
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• 제12권3호
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• pp.325-335
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• 2003

An agricultural land application of swine slurry is one of the best management practices in Jeju island whose ground water must be protected. So as to study the effect of appling swine slurry on ground water or aquifer, incubation-leaching technique was used by assuming the incubating period of 1, 2, 4, 8, 16, or 32 days, and application rate of 3200.0 mgT-N/$\ell$ , 820.0 mgT-P/$\ell$, and 1887.0 mgK$\^$+/$\ell$ in swine slurry. The leachates were collected from the soil columns(PVC 30 cm L${\times}$5.5 cm D) packed 15cm in depth with Gangjeong soil series by washing with 100 mL distilled water. The leached components were measured by using ion chromatography far Cl$\^$-/, NO$_3$-N, F$\^$-/, Br$\^$-/, Na$\^$+/, K$\^$+/, Ca$^2$$\^$+/, and Mg$^2$$\^$+/ , atomic absorption spectrophotometry for Fe and Mn, and UV-Vis spectrophotometry for T-N and T-p. Application of swine slurry in naked soil could influence on the ground water or aquifer by increasing nitrate-nitrogen in leachate with time, or leaching the cations present in soils in accompany with anions because of H$\^$+/produced in nitrification. Therefore, careful consideration should be taken about what amount, when, where, and how fur protecting ground water system.

• 생약학회지
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• 제19권1호
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• pp.28-33
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• 1988

To identify biologically active enzymatic components of the higher fungi in Korea, the dried carpophores of Cryptoderma citrinum was smashed with cool distilled water, extracted, salted out and the precipitate was purified by dialysing with visking tube and dissolved with pH 7.8 ammonia aqua. The fraction of the filtrate was lyophilized to obtain as light brown powder and then cellulase activity was determined. Cellulolytic potency of Cryptoderma citrinum was 750 unit/g. The optimum condition for the enzymatic reaction was pH 4.5 and $40^{\circ}$. The enzyme activity was activated in the presence of $Ca^{2+}$, $Fe^{2+}$ and $Co^{2+}$.

• 한국약용작물학회지
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• 제22권3호
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• pp.203-209
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• 2014

Onion (Allium cepa L.) is one of the richest sources of flavonoids in human diet. Onion peel contains over 20 times more quercetin than onion flesh. In this study, we studied the effects of onion peel water extract (OPE) on the blood lipid profiles in mice. The onion peel extracts was extracted with hot water. The experimental groups were divided with 3 groups (n = 6) of ICR male mice: normal diet + distilled water (NC), high-fat diet + distilled water (HF), high-fat diet + onion peel water extract 20 mg/kg (OPE-20). The oral administration was conducted daily. The experimental period was 7 weeks. Onion peel water extract showed higher concentration of polyphenol gallic acid and anti-oxidant trolox equivalent than the ethanol extract. The body weight gain and food efficiency ratio was significantly lower in the OPE-20 group as compared with HF group (p < 0.05). The epididymal fat and retroperitoneal fat showed significantly lower weights and sizes in the OPE-20 group as compared with HF group (p < 0.05). The serum levels of total cholesterol, LDL cholesterol and triglyceride were significantly lower in the OPE-20 group as compared with HF group (p < 0.05). The OPE-20 group showed higher HDL cholesterol concentration than HF group (p < 0.05). Atherogenic index was ignificantly lower in as compared with HF group (p < 0.05). The serum levels of glucose, GOT and GPT were significantly lower in the OPE-20 group as compared with HF group (p < 0.05). In these results, we suggests that onion peel water extracts supplementation can reduces the serum lipid components and improves the lipid metabolism in hyperlipidemic mice induced with a high-fat diet.

• 생약학회지
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• 제38권4호
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• pp.349-353
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• 2007

Skin wrinkle formations are associated with collagen synthesis and matrix metalloproteinase-I(MMP-1) activity. This study was carried out to find out skin wrinkle reducing components in Torilis Fructus. Torilis Fructus were extracted with 70% ethanol and the ethanol extracts were systematically fractionated with n-hexane, ethylacetate, n-butanol and distilled water. Among them, antiwrinkle component from n-hexane fraction was purified by several column chromatographies and HPLC, which identified as torilin by $^1H-NMR,\;^{13}C-NMR$ and ESI-MS. To determine cell viability, collagen biosynthesis and MMP-1 activity, human dermal fibroblast was treated with 1-5 ppm concentrations of Torilis Fructus extract fraction and torilin. Cell viability was showed 84-102% at all group treated with 1-5 ppm. Collagen synthesis was increased in all group, especially torilin-treated group was highest amount. Active forms of MMP-1 were decreased in all group. From these results, we consider that Torilis Fructus have several antiwrinkle components and torilin may be one of the effective components.

• 한국식품과학회지
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• 제27권5호
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• pp.724-728
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• 1995

건조된 털목이버섯의 일반성분, 무기질, 아미노산함량을 분석하였으며, 또한 건조된 털목이버섯을 수화과정시 복원력, 갈색도 및 침지후 핵산관련물질의 함량 변화 등을 조사한 결과는 다음과 같다. 일반성분조성은 조단백질 12.6%, 조지방 2.1%, 조섬유 6.7%, 그리고 조회분 6.2%였다. 목이버섯의 Ca, K, Mg 함량은 다른 무기물에 비해서 높았으나 Mn, Ni 함량은 매우 적었다. 그리고 아미노산중 aspartic acid, glutamic acid의 함량이 가장 높았다. 수화과정시 침지시간 및 온도의 증가와 함께 가용성물질의 용출율, pH, 갈색도 및 복원력은 증가하였고, 침지후 핵산관련물질의 함량은 감소하였다. $5^{\prime}-GMP$가 가장 높은 함량을 보였으며, 가장 적은 성분은 $5^{\prime}-CMP$였다.

• 복식문화연구
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• 제18권2호
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• pp.371-381
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• 2010

The pine needles can be used for four seasons in normal living and it can be taken friendly everywhere as it is distributed over 50% in Korea. The pine needles consist of vitamins, protein, minerals, essential oil and enzyme related to antimicrobial activity. It has effect like high blood pressure, neuralgia and hanged over by terpene, glucokinin, rutin, apigenic acid and tannin. Also the extract of them can be used for dyeing of fabrics. However, the extract components and effects of them are not well known yet. Therefore, the purpose of this study was to investigate the volatile components of the pine needles extract and functionality. The pine needles extract was dyed into various fabrics(nylon, silk, wool and soybean) and mordanted with Al, Cu, Cr, Fe and Sn. The extracted aroma compounds were compared by gas chromatography-mass spectrometry. The major volatile compounds of pine needles verified by using SPME were alpha-pinene, beta-pinene, beta-phellandrene, caryophyllene, ethanon, benzen. A total of 15 compounds were identified by using the SPME fibers. In the UV-visible spectra, the maximum absorption of wavelength of the pine needles ethanol extract appeared at 460, 630nm for chlorophyll component and at 237, 281nm for tannin component with the pine needles distilled water extract. Most of sample showed high antibacterial effect in none mordant but wool fabric showed high antibacterial effect in mordants. The result of UV block test showed a superior ability of blocking ultraviolet ray infiltration in all sample.

• International Journal of Industrial Entomology and Biomaterials
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• 제41권2호
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• pp.36-44
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• 2020

Mulberry root bark is one of potential plant sources for antioxidant materials which can be used for the relief of oxidative stress. To explore the effects of solvent type and temperature on the structural characteristics and antioxidant activity of the root bark extracts, we prepared various extracts of mulberry root bark (Morus alba L.) using 0 - 100 % ethanol (EtOH) at RT - 100℃. EtOH concentration and temperature critically affected the extraction yields, the content of bioactive components, and antioxidant activity of the extracts. Use of high content of EtOH solvent and low temperature resulted in the low extraction yield. Meanwhile, it was revealed that the extract prepared using absolute EtOH at room temperature contained polyphenols and flavonoids with the highest contents among other extracts. Interestingly, the temperature differently affected the polyphenol and flavonoid contents according to the solvent types. In the case of 30% EtOH solvent, polyphenol and flavonoid contents increased with an increase in temperature, whereas in the case of 70 and 100 % EtOH, these contents decreased. Using the radical scavenging assay, it was confirmed that the 100% EtOH extracts had higher antioxidant activity compared to distilled water (DW) extracts regardless of temperature. Also, heating might extract more antioxidant components from the root bark. Especially, the extract prepared using 30% EtOH solvent at 100℃ showed the highest antioxidant activity. Taken together, these experimental results imply that the extraction parameters should be designed carefully considering the productivity, the extracted bioactive components, and antioxidant activity.