• 한국수산과학회지
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• 제36권6호
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• pp.601-605
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• 2003

This study investigated the effect of dietary pigment sources on growth and shell color of juvenile abalone(Haliotis discus hannai). Three replicate groups of the abalone (average weight 173 mg) were fed diets containing various pigment sources such as Porphyra powder, Spirulina, yeast astaxanthin, and paprika extract for 16 weeks. Survival and weight gain were not affected by dietary pigment sources (P>0.05). Shell color of abalone fed diets containing Porphyra powder and Spirulina approached the yellow-red and orange, colors similar to wild abalone. However, shell color of abalone fed the diets containing yeast astaxanthin and paprika extract were similar to the bright green control group. These results should be useful for changing the shell color of abalone in aquaculture.

• 한국응용과학기술학회지
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• 제29권4호
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• pp.610-617
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• 2012

탱자에는 여러 종류의 monoterpenes, limonoids, flavonoids과 coumarins 등의 구성성분으로 이루어져 있다. 탱자의 구성 성분중에 7-제라닐옥시쿠마린는 7개의 탄소로 구성된 제라닐옥시기의 곁사슬을 가진 물질이다. 그리고 7-제라닐옥시쿠마린은 여러 약리적인 효과들을 나타낸다고 알려져 있다. 본 연구에서는 탱자의 구성성분인 7-제라닐옥시쿠마린과 이들의 다양한 유도체를 합성하였다. 그리고 항염증에 대한 항염증 효능을 알아보기 위하여 염증을 유발하는 일산화질소 억제 cytokine을 측정한 결과는 6-제라닐옥시쿠마린의 성분이 사이토카인인 인터루킨-6가 $1{\mu}M$농도에서 68.9% 를, $10{\mu}M$에서 72.6% 의 저해효과를 나타냈다.

• Journal of Microbiology and Biotechnology
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• 제23권6호
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• pp.802-810
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• 2013

This work aims at investigating the production of yellow, orange, and red natural colorants in a submerged culture of Penicillium purpurogenum DPUA 1275. For this purpose, different experimental conditions evaluating the effect of incubation time, type and size of inoculum, and different carbon and nitrogen sources were performed. Furthermore, the growth kinetics were obtained in the conditions of $10^8$ spores/ml and 5 mycelia agar discs during 360 h. These experiments showed that 5 mycelia agar discs and 336 h promoted the highest yellow (3.08 $UA_{400nm}$), orange (1.44 $UA_{470nm}$), and red (2.27 $UA_{490nm}$) colorants production. Moreover, sucrose and yeast extract were the most suitable carbon and nitrogen sources for natural colorants production. Thus, the present study shows a new source of natural colorants, which can be used as an alternative to others available in the market after toxicological studies.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 춘계학술대회
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• pp.829-832
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• 2014

본 연구는 발효 홍국마로부터 에탄올 추출물 농도에 따른 생리활성 효과를 조사하기 위하여 실시하였다. 발효 홍국마 에탄올 추출물로부터 색소, DPPH radical 소거활성, 환원력 및 monacolin K 함량을 조사하였다. 그 결과, 기질로서 장마를 Monascus sp. MK805 균주로 발효하였을 때 홍국색소는 29.6(황색), 15.1(오렌지색), 20.4(적색), DPPH radical 소거활성은 72.8%, 환원력은 1.74 및 monacolin K 함량은 480.6 mg/kg으로 각각 조사되었다. 이처럼 발효 홍국마는 항산화 및 항고지혈증 관련 기능성 식품 및 의약품 소재로의 이용 기능성이 높은 것으로 사료된다.

• Membrane and Water Treatment
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• 제10권5호
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• pp.361-372
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• 2019

Effect of different alkane based solvents on the stability of emulsion liquid membrane was investigated using normal alkanes (n-hexane, n-heptane, n-octane and n-decane) under various operating parameters of surfactant concentration, emulsification time, internal phase concentration, volume ratio of internal phase to organic phase, volume ratio of emulsion phase to external phase and stirring speed. Results of stability revealed that emulsion liquid membrane containing n-octane as solvent and span-80 (5 % (w/w)) as emulsifying agent presented the highest amount of emulsion stability (the lowest breakage) compared with other solvents; however, operating parameters (surfactant concentration (5% (w/w)), emulsification time (6 min), internal phase concentration (0.05 M), volume ratio of internal phase to organic phase (1/1), volume ratio of emulsion phase to external phase (1/5) and stirring speed (300 rpm)) were also influential on improving the stability (about 0.2% breakage) and on achieving the most stable emulsion. The membrane with the highest stability was employed to extract acridine orange with various concentrations (10, 20 and 40 ppm) from water. The emulsion liquid membrane prepared with n-octane as the best solvent almost removed 99.5% of acridine orange from water. Also, the prepared liquid membrane eliminated completely (100%) other cationic dyes (methylene blue, methyl violet and crystal violet) from water demonstrating the efficacy of prepared emulsion liquid membrane in treatment of dye polluted waters.

• 생명과학회지
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• 제21권8호
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• pp.1142-1148
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• 2011

본 실험에서는 발효 홍국마를 기능성식품 소재로의 활용 가능성을 알아보기 위하여 발효 홍국마 분말을 에탄올 용매로 하여 농도별로 추출하고 색소 함량, monacolin K 함량, 총 폴리페놀 함량, DPPH radical 소거활성 및 ACE 저해활성 등을 측정하여 생리활성 효과와 더불어 에탄올을 추출용매로 한 최적의 추출조건을 확립하고자 하였다. 그 결과, 에탄올 농도에 따른 천연색소의 추출량은 에탄올 농도가 50% 일 때 red, orange 및 yellow 색소는 각각 13.48, 11.66 및 12.77 units으로 가장 높게 나타났으며, monacolin K 함량은 에탄올 농도가 75% 일 때 462.78 mg/kg으로 가장 높게 나타났다. 또한, 총 폴리페놀 함량과 DPPH radical 소거활성은 에탄올 농도가 50%일 때 각각 655.63 mg/kg 및 92.8%로 가장 높게 나타났으며, ACE 저해활성의 경우 에탄올 농도 95% 일 때 74.55%로서 가장 높게 나타났다. 이상의 결과를 종합하였을 때 사용목적에 따라서 에탄올 농도를 50% 이상으로 하여 추출하는 것이 각각의 생리활성 효과를 증대 시키는데 있어서 좋을 것으로 사료되며, 특정 생리활성 물질의 생산증대를 위한 방안으로서 발효조건의 최적화를 통하여 수율 증대를 하고자 추가 실험을 진행하고 있다.

• BMB Reports
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• 제53권12호
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• pp.652-657
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• 2020

Danshen (Salvia miltiorrhiza) is a traditional medicinal plant widely used in Asian countries for its pharmacological activities (e.g., amelioration of cardiovascular diseases). In this study, we investigated the anti-atherosclerotic activity of raw danshen root extract prepared using high hydrostatic pressure (HHP) at 550 MPa for 5 min and hot water extraction. This method was useful for elimination of bacteria from cultured danshen plants and for better extraction yield of active principles. The HHP-treated danshen extract (HDE) inhibited proliferation of human umbilical vein endothelial cells (HUVECs) and induced autophagy that was assessed by LC3 conversion and p62 degradation. HDE suppressed foam cell formation in oxLDL-induced RAW264.7 macrophages; lysosomal activity simultaneously increased, measured by acridine orange staining. HDE also reduced atherosclerotic plaque development in vivo in apolipoprotein E knock-out (ApoE-/-) mice fed a high cholesterol diet. Taken together, these results indicated that HDE exhibited anti-atherosclerotic activity via autophagy induction.

• 한국환경과학회지
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• 제29권12호
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• pp.1171-1184
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• 2020

The green synthesis of inorganic nanoparticles (NPs) using biomaterials has garnered considerable attention in recent years because of its eco-friendly, non-toxic, simple, and low-cost nature. In this study, we synthesized NPs of noble metals, such as Ag and Au using an aqueous extract of a marine seaweed, Ecklonia cava. The formation of AgNPs and AuNPs was confirmed by the presence of surface plasmon resonance peaks in UV-Vis absorption spectra at approximately 430 and 530 nm, respectively. Various properties of the NPs were evaluated using characterization techniques, such as dynamic light scattering, transmission electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and X-ray diffraction analysis. Phytochemicals in the seaweed extract, such as phlorotannins, acted as both reducing and stabilizing agents for the growth of the NPs. The green-synthesized AgNPs and AuNPs were found to exhibit high catalytic activity for the decomposition of organic dyes, including azo dyes, methylene blue, rhodamine B, and methyl orange.

• 한국식품과학회지
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• 제6권4호
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• pp.209-213
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• 1974

저장중에 변색(變色)된 굴통조림의 황변패육부위(黃變貝肉部位, 생식소(生殖巢)) 및 청록색 내장(주로 소화육낭(消化育囊))을 각각 함수(含水) 아세톤으로 추출하여 얻은 색소 물질을 실리카겔 크로마토그라피로 분리하였다. 함수 아세톤으로 추출한 색소 추출액으로 부터 11종 의 황색 (1종), 적색 (1종), 등색 또는 적등색(赤燈色)(5종) 및 녹청(綠靑)(4종) 색소를 분리하고 각각의 가시 부 흡수 스펙트럼을 얻었다. 전자 흡수 스펙트럼 및 몇가지 발색반응(發色反應)에 의하여 함수 아세톤에 의해 추출되는 황갈색(黃褐色) 색소액의 성분을 검토한 결과는 다음과 같다. 즉 청록색색소에 있어서는 물론 대부분의 황등색 색소들도 클로로필 (chlorophyll)의 분해로 유래되었다고 생각되는 포르피린(porphyrin) 유도체이며 일부의 황등색 색소는 carbonyl 원자단을 갖인 캐로틴오이드(carotenoid)로 추정되었다. 특히 피오피틴(pheophytin) a 내지 그 유연체(類緣體)라고 생각되는 밴드 8의 색소와 캐로틴오이드 라 추정되는 밴드 7의 색소가 함량이 높은 주요 색소들이다. 황변패육(黃變貝肉)의 추출물의 크로마토그람이 내장의 추출액의 그것과 정성적으로 유사한 점으로 미루어 보아 패육(貝肉)의 황변물질(黃變物質)은 내장 색소에서 유래되며 이 황갈 변색을 일으키는 phorphyrin 유도체 및 carotenoid 들은 함수 아세톤에 잘 용해되는 성질의 것임을 알수 있었다.

• Journal of Microbiology and Biotechnology
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• 제27권4호
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• pp.731-738
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• 2017

A novel approach to synthesize silver nanoparticles (AgNPs) using leaf extract of Canna edulis Ker-Gawl. (CELE) under ambient conditions is reported here. The as-prepared AgNPs were analyzed by UV-visible spectroscopy, transmission emission microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, energy-dispersive analysis of X-ray spectroscopy, zeta potential, and dynamic light scattering. The AgNPs showed excellent antimicrobial activity against various pathogens, including bacteria and various fungi. The biocompatibility of the AgNPs was analyzed in the L929 cell line using NRU and MTT assays. Acridine orange/ethidium bromide staining was used to determine whether the AgNPs had necrotic or apoptotic effects on L929 cells. The concentration of AgNPs required for 50% inhibition of growth of mammalian cells is far more than that required for inhibition of pathogenic microorganisms. Thus, CELE is a candidate for the eco-friendly, clean, cost-effective, and nontoxic synthesis of AgNPs.