• Journal of the Korean Society of Food Science and Nutrition
• /
• v.29 no.6
• /
• pp.1127-1132
• /
• 2000

홍화(Carthamus tinctorius L.)의 씨. 순 및 꽃잎의 수용성 및 메탄올 추출물에 대하여 in vitro 실험계에서 항산화 활성을 비교 검토하였다. 성장기 흰쥐의 뇌 micro-some을 이용한 생테막 지질 과산화 억제정도는 꽃잎 수용성 추출물(97.19%)>순 메탄올 추출물(81.38%)>꽃잎 메탄올 추출물(64.99%)>씨 메탄올 추출물(64.95%) 순으로 나타났다. Limoleic acid 산화 실험계에서는 홍화씨 메탄올 추출물과 홍화씨 수용성 추출물에서 비교적 높은 항산화 활성을 보였다. DPPH 에 의한 수소공여능은 특히 순의 0.1% 메탄올 추출물에서 매우 높은 수소공여작용이 나타나 대조구인 BHT와 거의 비슷한 수준의 항산화 활성을 보였다. 이들 추출물의 폴리페놀 화합물 함량은 홍화 꽃잎 수용성 및 MeOH 추출물은 12.70% 및 8.05% 홍화씨 수용성 및 메탄올 추출물은 6.96% 및 12.34%, 홍화순 수용성 메탄올 추출물 및 메탄올 추출물이 8.75% 및 5.10%로 나타났다.

• Korean Journal of Food Science and Technology
• /
• v.49 no.2
• /
• pp.215-221
• /
• 2017

The biological activity of water-soluble polysaccharide (WSP) fractions extracted from Cedrela sinensis was examined in this study. Cedrela sinensis was extracted using hot water, ultrasonication, and enzymes (Viscozyme, Shearzyme) and precipitated using ethanol to produce crude polysaccharides. The yield (3.51%) and total polysaccharide content (28.03 g/100 g) of WSP extracted using Shearzyme (WSPs) were highest compared to other extracts. The antioxidant activity of WSP extracted using hot water was highest and had the lowest $IC_{50}$ values in DPPH, ABTS, hydroxyl radical scavenging activity, reducing power, and superoxide dismutase-like activity. Tyrosinase inhibitory activity increased as the concentration increased. All extracts showed higher retardation effects on glucose and bile acid compared to the control; particularly, WSPs showed a similar glucose retardation effect to carboxymethyl cellulose. This study suggests that WSP from C. sinensis can be used as a functional food material.

• Korean journal of food and cookery science
• /
• v.16 no.5
• /
• pp.385-389
• /
• 2000

Desmutagenic effects of water-soluble and water-insoluble fractions from Aloe vera and Aloe avoresence with different solvents against the mutagenicity of 4-nitro-o-phenylenediamine(NPD) were investigated. Desmutagenic effects of water-insoluble fractions from Aloe vera and Aloe avoresence against NPD-induced mutations in TA97 and TA98 strains were very high compared with water-soluble fractions: whereas water-soluble fractions from two kinds of Aloes showed the inhibition effects of 4∼56% water-insoluble fractions showed the activities of 54∼100% for Aloe vera and 74∼100% for Aloe avoresence. Especially, the addition of 20 $\mu$ι of water-insoluble fractions per plate showed high activities up to 90% in TA97 and TA98 strains.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.29 no.3
• /
• pp.531-536
• /
• 2000

뽕나무 (Morus alba) 및 꾸지뽕나무(Cudrania tricuspidata) 잎으로부터 추출한 수용성 물질을 0.5% 콜레스테롤 투여 식이에 1%(w/w) 수준으로 첨가하여 각 조직에서의 지질 과산화물 생성정도를 나타내는 TBARS 측정법으로 항산화 활성을 검토하였다. 흰쥐의 체중 및 식이 섭취량은 실험군 간의 유의적인 차이는 없었다. 간장 및 뇌 조직 중량은 뽕잎 추출물군에서 증가하였다. 신장의 지질 과산화물 함량은 대조군에 비해서 뽕잎 추출물군에서 유의적으로 감소하였다. 뇌 및 심장의 지질 과산화에서 유의적으로 감소하였다. 뇌 및 심장의 지질 과산화물 함량은 대조군에 비교해서 꾸지뽕잎 추출물군에서 유의적으로 증가하였다. 간장 및 비장의 경우에는 각 실험군 간에 유의적인 차이가 없었다. 각 조직의 microsomes 분획으 지질 과산화물은 심장과 비장에서 뽕잎 및 꾸지뽕잎 추출물군에서 감소하였으나, 다른 조직에서는 현저한 차이가 없었다. 한편, 각 조직의 microsomes 분획을 얻어서 Fe2+/ascorbate로 지질 과산화물을 유도하기 위하여 37$^{\circ}C$에서 한시간 반응을 시킨 결과, 뽕잎 및 꾸지뽕잎 추출물군에서 약 절반 정도 감소하였으며, 상대적 증가량은 뇌조직 microsomes에서 현저하였다. 본 실험의 결과 신장조직 및 간장 microsome막 지질 과산화물 함량은 뽕잎 및 꾸지뽕잎 수용성 추출물에 의해 감소되었으며, 뇌 및 심장조직의 지질 과산화물 함량은 꾸지뽕잎 수용성 추출물에 의해 증가됨으로써 봉잎 추출물간의 차이를 나타내었다.

• Korean Journal of Plant Resources
• /
• v.19 no.1
• /
• pp.169-173
• /
• 2006

The effects of aqueous extract and volatile substances of 2 Angelica plants on seed germination and seedling growth were investigated. The seed germination of Angelica gigas showed increase in proportion to increase in aqueous extract concentration of A. gigas, while that of Angelica acutiloba was reduced proportionally to the extract concentration. The seed germination of A. gigas and A. acutiloba treated with aqueous extract of A. acutiloba was inhibited. The seedling elongation of A. gigas and A. acutiloba was slightly increased at lower concentration of aqueous extract of A. gigas, whereas it was proportionally decreased at higher concentrations. The seedling elongation of 2 Angelica plants was decreased by the aqueous extract of A. acutiloba. The aqueous extract of A. acutiloba caused significant inhibition in seedling growth of 2 Angelica plants. The seed germination of Lactuca sativa was not affected by volatile substances emitted from 2 Angelica plants. The radicle elongation of L. sativa treated with volatile substances of 2 Angelica plants was inhibited slightly and it was not suppressed according to the concentration of volatile substances.

• Korean journal of food and cookery science
• /
• v.16 no.5
• /
• pp.390-393
• /
• 2000

Desmutagenic effects of water-soluble and ethanol-soluble extracts of dried green tea toward the mutagenicity of 4-nitroquinoline-N-oxide(4-NQO) and 3-Amino-1,4-dimethyl-5H-pyrido［4,3-b］indole(Trp-P-1) in streptomycin-dependent SD510 strains of Salmonella typhimurium TA98 were investigated. Inhibition effects toward the mutagenicity of 4-NQO and Trp-P-1 of water-soluble and ethanol-soluble extracts from green tea were high as increase of concentration of extracts. Desmutagenic effects toward 4-NQO of water-soluble and ethanol-soluble extracts from green tea harvested in May and August were up to 93% in 1,000 $\mu\textrm{g}$ of extract/plate. Desmutagenic effects toward Trp-P-1 of ethanol-soluble extracts from green tea were 53.3∼92.1%, but the effects of water-soluble extracts decreased as increase of concentration of extracts.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.30 no.3
• /
• pp.557-564
• /
• 2001

The purpose of this study was to investigate the quality characteristics and oxidative stability of kimbugak, a traditional Korean food, made of aqueous green tea (KBG-AGT). The kimbugak was stored at 6$0^{\circ}C$ for 40 day. When 5% AGT was added, the acid value and peroxide value were lower than both the control and the KBG-10% AGT. Fried KBG-AGT contained mostly linoleic acid ($C_{18:2}$), followed by oleic acid ($C_{18:1}$) and palmitic acid ($C_{16:0}$). The proportion of saturated fatty acid was higher in the control compared to both the 5% and the 10% KBG-AGT. Among the unsaturated fatty acids, monoenes only slightly decreased while polyenes greatly decreased in particular, in the control. The proportion of carotenoid and chlorophyll a was higher in KBG-AGT than both in the control and in the fried KBG-AGT. When the aqueous green tea content was increased, The content of chlorophyll a increased but that of the carotenoid did not change. The seaweed's original and after taste scored highest in the KBG-5% AGT. Overall, the KBG-AGT and the fired KBG-AGT were preferred more thant the control.

• The Korean Journal of Food And Nutrition
• /
• v.24 no.3
• /
• pp.414-421
• /
• 2011

시중에 유통 중인 영양보충용 제품의 수용성 비타민 $B_1$(thiamin), $B_2$(riboflavin), $B_3$(nicotinic acid and nicotine amide), $B_6$(pyridoxine), C(ascorbic acid)의 신속한 동시분석 방법을 확립하기 위하여 본 연구를 실시하였다. 영양보충용 제품은 정제, 연질캅셀, 분말, 액상의 4가지 제형에 대해 27종의 제품을 구입한 후, Ion-pair 분리기법을 사용하여 HPLC-UVD를 이용한 동시분석 방법을 검토하였다. 비타민 $B_1$, $B_2$, $B_3$, $B_6$, C의 HPLC에 의한 동시분석 조건을 검토한 결과, 이동상은 0.02% triethylamine, 17.5% 메탄올, $5{\mu}M$ sodium hexanesulfonic acid가 함유된 pH 3.5(acetic acid로 조절)의 수용액을 사용하였고, 용출시간은 다른 피크의 영향을 받지 않도록 30분으로 하였다. 수용성 비타민의 회수율은 96% 이상이었다. 본 연구에 의해 확립된 수용성 비타민의 동시분석 조건은 검량선의 직선성, 정밀성, 정확성, 기기적합성 등이 USP 및 ICH 기준에 적합하여 HPLC의 동시분석 방법으로 합당하였다. 수용성 비타민의 추출 용매는 제형에 따라 약간의 차이를 보이긴 했으나, 물이나 산성조건을 갖춘 HPLC의 이동상이 에탄올이나 메탄올보다 높은 추출 효율을 보였다. 초음파 추출기에 의한 추출 시간은 20분이 가장 적당하였다. 본 연구의 결과는 수용성 비타민의 신속한 추출 및 분석에 매우 효율적으로 이용될 것으로 기대된다.

• Proceedings of the Korean Society of Applied Pharmacology
• /
• 1992.05a
• /
• pp.26-26
• /
• 1992

신경계의 수용체 중에서 카테콜아민 신경계의 작용을 매개하는 수용체에는 $\alpha$-, $\beta$-, D-수용채 등이 있으며 카테콜아민 신경계의 활성변화를 유발시켜 인위적으로 생리현상 변화를 초래할 목적으로 사용되는 각종 의약품 등의 효능도 결국 체내에서 이들 수용체를 경유하여 발현된다는 사실들이 밝혀지고 있다. 신약대상물질의 신속한 효능검색 이외에 수용체를 활용해야 하는 중요한 신약개발 연구는 수용체의 구조 파악과 수용체와의 결합력을 근간으로 하여 신약의 기본구조에 접근하는 방식이다. 이러한 연구에서 소기의 성과를 얻기 위해서는 수용체의 추출, 정제, 특성파악, 수용체-신호전달 체계의 상관성, 수용체 관련 질병의 분류, 수용채의 클로닝 및 대량생산 등이 동반 수행되어야 한다.

• Journal of Life Science
• /
• v.14 no.5
• /
• pp.863-867
• /
• 2004

Antioxidative activities of pine (Pinus denstifora) needle extracts were tested in vitro experimental models. The concentration of total polyphenolic compound of water extracts from pine needle was 1.61 %. In DPPH ($\alpha$, $\alpha'$-diphenyl-$\beta$-picrylhydrazyl) method, the electron donating activity of 0.1 % water extracts from pine needle was as high as BHT (0.05%, w/v). The antioxidative activity was measured by inhibition against lipid peroxidation of rat liver microsome, and this activity was shown in the following: 67.7% at 0.1% concentration >63.1% at 0.05% concentration > 28.2% at 0.01% concentration. In antioxidative activity determined by thiocyanate method against lipid peroxidation using linoleic acid, the antioxidative activities at all concentration of 0.01 %, 0.05% and 0.1 % were much higher than control during 7 days. In TBA method, the antioxidative activity was increased with increasing concentration until 6 days. These results support that water extracts from pine needle contain antioxidative compounds.