• 한국버섯학회지
• /
• 제15권3호
• /
• pp.99-103
• /
• 2017

The objective of this study was to determine the anti-diabetic effect of the water extract of Neolentinus lepideus in a diabetic mouse model. Seven-week-old C57BL/KsJ-db/db mice were fed either a control diet (CD) or diet supplemented with 1% or 5% of N. lepideus water extract (NLWE1 or NLWE5) for 10 weeks. Oral administration of NLWE significantly decreased the body weight gain compared to that of CD-fed group. Mice in the NLWE group had significantly lower levels of fasting serum glucose, fatty acids, and low-density lipoprotein cholesterol compared to those in the control group. These effects were accompanied by reduced fatty liver and improved glucose tolerance in the NLWE group. Taken together, these results suggest that N. lepideus might have potential as a dietary supplement to control diabetes.

• 한국식생활문화학회지
• /
• 제16권4호
• /
• pp.388-397
• /
• 2001

Wild edible plants are consumed as raw and/or processed. Analytical data for raw biologically functional compounds were relatively well established. The changes on functional compounds during processing are, however, not well studied. This study was carried out to investigate the change of the quality of wild edible plants, Pimpinella brachycarpa(Chamnamul) at various conditions. Samples were blanched at the salt concentration of 0%, 1% or 2% for 1, 2, and 3 minutes each. The biologically active compounds, vitamin C, ${\beta}-carotene$, chlorophyll, flavonoids, polyphenols and minerals were analyzed. The concentration of vitamin C in Chamnamul decreased as blanching time increased. Beta-carotene in Chamnamul showed high concentration when Chamnamul was treated under longer blanching time. Higher salt concentration of blanching water, however, resulted in the increased concentration of ${\beta}-carotene$ in the blanched Chamnamul. Higher salt concentration of blanching water also reduced the loss of total flavonoids and total polyphenols from the blanched Chamnamul. The change of colors in the blanching water seemed to be corresponding to those of total flavonoids and total polyphenols concentrations in the blanching water.

• Preventive Nutrition and Food Science
• /
• 제20권3호
• /
• pp.162-168
• /
• 2015

Lotus (Nelumbo nucifera Gaertn.) seed is widely used as a traditional medicine in countries of Asia. Among many functions of the lotus seed, one interesting activity is its skin protection from the sunlight and scar. In this study, we focused on the skin protective property of lotus seed tea against ultraviolet B (UVB) irradiation. Two groups of a hairless mouse model, water as control (water group) and lotus seed tea (LST group), were administrated a fluid drink water for six months. After 6 month of administration, UVB exposure was carried out to both groups for another 3 months. During and after the administration, the skin moisture content and the morphological and histopathological analyses through biopsy were carried out. Prior to UVB irradiation, no significant difference was discovered in the skin moisture content for the water group and LST group (P<0.05). However, drastic changes were observed after the UVB treatment. The LST group showed a clear evidence of skin protection compared to the control group (P<0.05). The moisture content, epidermal and horny layer thickness, and protein carbonyl values all revealed that the intake of the lotus seed tea enhanced protection against UVB exposure. As a result, the long-term intake of the lotus seed tea showed the effect of preventing loss of skin moisture, mitigating the formation of abnormal keratinocytes, and contributing to protein oxidation inhibition.

• 한국식품과학회지
• /
• 제49권1호
• /
• pp.44-49
• /
• 2017

아임계수 추출 기술을 이용하여 참당귀로부터 데쿠신, 노다케닌을 추출하고 HPLC, HPLC-ESI/MS를 이용하여 추출조건에 따른 유효성분을 정성 및 정량적으로 비교 분석하였다. 추출결과, 데쿠신과 노다케닌의 추출함량은 아임계수 추출법과 비교하여 열수 추출 방법을 이용하는 것이 약간 많거나 유사하였지만, 추출 시간은 아임계수 추출법이 5-10분 이내로 매우 빠르게 추출할 수 있는 장점이 있다. 그리고 총 페놀함량, 총 플라보노이드 함량은 아임계수 추출법이 우수하게 많이 추출됨을 확인 할 수 있었고, DPPH, ABTS 라디칼 소거능을 이용한 산화방지 효과도 아임계수 추출법이 우수하였다. 특히, 아임계수 추출 조건인 추출 온도와 추출 시간이 증가할수록 총 페놀함량 및 총 플라보노이드 함량, 그리고 산화방지 효과 또한 점차적으로 증가하는 경향을 나타내었고 높은 상관관계를 보였다. 이는 오직 물만을 사용하여 유효성분을 추출하는 친환경적이며 안전하고 독성이 없는 아임계수 추출의 잠재성과 우수성을 확인한 결과이며, 다양한 한약재뿐만 아니라 다른 식품 추출 산업에 응용하여 사용될 수 있을 것이다.

• Preventive Nutrition and Food Science
• /
• 제18권1호
• /
• pp.60-66
• /
• 2013

The whole saltwort plant (Salicornia herbacea) was micronized to develop the table salt substitute. The micronized powder was mixed with distilled water and made into a spherical granule by using the fluid-bed coater (SGMPDW). The SGMPDW had superior flowability to powder; however, it had low dispersibility. To increase the dispersibility of SGMPDW, the micronized powder was mixed with the solution, which contained various soluble solid contents of saltwort aqueous extract (SAE), and made into a spherical granule (SGMPSAE). The SGMPSAE prepared with the higher percentages of solid content of SAE showed improved dispersibility in water and an increase in salty taste. The SGMPSAE prepared with 10% SAE was shown to possess the best physicochemical properties and its relative saltiness compared to NaCl (0.39). In conclusion, SGMPSAEs can be used as a table salt substitute and a functional food material with enhanced absorptivity and convenience.

• 생명과학회지
• /
• 제14권6호
• /
• pp.925-930
• /
• 2004

양파 열수 추출물의 항산화능 및 인공소화 전과후의 항돌연변이 효과를 BHT와 ascorbic acid와 비교하여 조사하였다. 총 페놀 및 플라보노이드의 함량은 노란색 양파 추출물이 횐색 양파 추출물보다 많았으며, 양파 추출물의 과산화수소 소거능은 농도가 증가함에 따라 비례적으로 증가하였다. $\beta-carotene-linoleate\;system$에서 항산화능과 reducing power는 증가되었으나, BHT와 ascorbic acid보다는 낮았다. 양파열수 추출물의 인공소화 후에 IQ와 MNNG로 처리된 Salmonella typhimurium TA80과 TA100에 대하여 항돌연변이 효과가 나타났으며, 노란색 양파가 횐색 양파보다 높게 나타났다. 결론적으로 양파 추출물을 소화시키면 항산화 및 항돌연변이의 효과는 양파의 페놀과 플라보노이드의 성분 변화에 의한 것으로 판단된다.

• Food Science and Biotechnology
• /
• 제15권3호
• /
• pp.437-440
• /
• 2006

To explore the possible usefulness of ${\beta}$-glucans as natural antioxidants, the antioxidant profiles of ${\beta}$-glucan, extracted from Saccharomyces cerevisiae KCTC 7911, and water soluble and insoluble mutant ${\beta}$-glucan, isolated from yeast mutant S. cerevisiae IS2, were examined by five different in vitro evaluation methods: lipid peroxidation value (POV), nitric oxide (NO), 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, reducing power, and ${\beta}$-carotene diffusion assay. The antioxidant activities of all ${\beta}$-glucans evaluated in POV test were comparable to or better than that of the known antioxidant, vitamin C. Remarkably, the ${\beta}$-glucan and water insoluble mutant ${\beta}$-glucan possessed 2.5-fold more potent activity than vitamin C at a dosage of 2 mg. Although vitamin C showed 100-fold greater activity than all ${\beta}$-glucans in NO and DPPH tests for measuring the radical scavenging capacity, all ${\beta}$-glucans revealed higher radical scavenging activity than the known radical scavenger, N-acetyl-L-cysteine (NAC), in DPPH test. The water insoluble mutant ${\beta}$-glucan had 2.6- and 5-fold greater antioxidative activity than water soluble ${\beta}$-glucan in NO and DPPH tests, respectively, showing that all ${\beta}$-glucans were able to scavenge radicals such as NO or DPPH. While all ${\beta}$-glucans revealed lower antioxidant profiles than vitamin C in both reducing power activity and ${\beta}$-carotene agar diffusion assay, the ${\beta}$-glucan and water insoluble mutant ${\beta}$-glucan did show a marginal reducing power activity as well as a considerable ${\beta}$-carotene agar diffusion activity. These results confirmed the potential usefulness of these ${\beta}$-glucans as natural antioxidants.

• Preventive Nutrition and Food Science
• /
• 제22권3호
• /
• pp.216-222
• /
• 2017

Antioxidant rich green leafy vegetables including garden spinach leaf, water spinach leaf, Indian spinach leaf, and green leaved amaranth were selected to evaluate the effects of water boiling and oil frying on their total phenolic content (TPC), total flavonoid content (TFC), reducing power (RP), and antioxidant capacity. The results revealed that there was a significant increase in TPC, TFC, and RP in all the selected vegetables indicating the effectiveness of the cooking process on the antioxidant potential of leafy vegetables. Both cooking processes enhanced significantly (P<0.05) the radical scavenging ability, especially the oil fried samples showed the highest values. There is a significant reduction in the vitamin C content in all the vegetables due to boiling and frying except in the Indian spinach leaf. However, the present findings suggest that boiling and frying can be used to enhance the antioxidant ability, by increasing the bioaccessibility of health-promoting constituents from the four vegetables investigated in this study.

• 한국축산식품학회지
• /
• 제27권4호
• /
• pp.457-462
• /
• 2007

본 연구에서는 노계 가슴육의 단백질 식품 소재로서 활용도를 높이기 위하여 초음파를 이용한 근원섬유 단백질의 수용화에 대하여 검토하였다. 근원섬유에 0.1-0.8 M NaCl, pH 6.0-8.0이 되도록 조절한 후 20 kHz에서 초음파 처리를 하였다. 그런 다음 이들의 용해도, SDS-PAGE, 점도, Ca- 및 Mg-ATPase 활성을 측정하였다. 각각의 처리 조건에서 용해도를 검토한 결과 초음파에 의해서 용해도는 증가하였으며 0.1 M NaCl, pH 8.0에서 약 90%를 나타내었다. 용해된 성분을 SDS-PAGE를 이용하여 검토한 결과 대부분 myosin heavy chain 및 actin에 상당하는 성분이 검출되었으며, 초음파에 의한 단백질의 분리는 근원 섬유 구조의 붕괴에 의한 것으로 사료되었다. 한편, 초음파에 의한 점도의 변화는 용해도가 높을수록 점도도 증가하였다. 그러나, Ca- 및 Mg-ATPase 활성은 초음파에 의해서 급격히 저하하였으며, 초음파에 의해서 분리되는 단백질은 대부분 변성이 진행된 상태인 것으로 사료되었다.

• Preventive Nutrition and Food Science
• /
• 제2권1호
• /
• pp.23-28
• /
• 1997

Physicohemical properties of corn starches isolated from non-glutinous and corn grains fol-lowing γ-irradiation up to 10kGy were investigated. Blue value, water binding capacity and swelling power decreased, while alkali number ad solubility increased by γ-irradiation , which was more pronounced in glu-tinous corn starch than in non-glutinous corn starch. The optical transmittance increased with an increment of heating temperature and applied irradiation doses. No significant difference was observed in Hunter's color value between both starches isolated from non- irradiated and irradiated and irradiated corn grains. Amylograph viscosities decreased remarkably as dose levels increased. The overall effects of γ-irradiation was more distinguished in glutinous starch than in non-glutinous starch.