• 한국환경농학회지
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• 제35권2호
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• pp.111-120
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• 2016

BACKGROUND: Arsenic (As)-contaminated groundwater used for long-term irrigation has emerged as a serious problem by adding As to soils. Phytoremediation potential of fiber crops viz., kenaf (Hibiscus cannabinus L.), mesta (Hibiscus sabdariffa L.), and jute (Corchorus capsularis L.) was studied to clean up As-contaminated soil.METHODS AND RESULTS: Varieties of three fiber crops were selected in this study. Seeds of kenaf, mesta, and jute varieties were germinated in As-contaminated soil. Uptake of As by shoot was significantly higher than that by root in the contaminated soil. In As-contaminated soil, kenaf and mesta varieties accumulated more As, than did jute varieties. In the plant parts above ground, mainly the shoots, the highest As absorption was recorded in kenaf cv. HC-3, followed by kenaf cv. HC-95. Kenaf varieties produced more biomass. In terms of higher plant biomass production, and As absorption, kenaf varieties showed considerable potential to remediate As-contaminated soil.CONCLUSION: The overall As absorption and phytoremediation potentiality of plant varieties were in the order of kenaf cv. HC-3 > kenaf cv. HC-95 > mesta cv. Samu-93 > jute cv. CVE-3 > jute cv. BJC-7370. All varieties of kenaf, mesta, and jute could be considered for an appropriate green plant-based remediation technology in As-contaminated soil.

• 한국어병학회지
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• 제30권1호
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• pp.63-66
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• 2017

본 연구에서는 29종의 식용작물을 이용하여 전복박리 효과를 조사한 결과, 스피아민트, 레몬밤, 로즈플라워, 양파, 와사비분, 겨자분, 오미자 및 히비스커스 용액에서 박리효과가 관찰되었다. 특히, 오미자와 히비스커스 용액에서는 90% 이상의 박리율이 관찰되었다. 양식장에서 사육중인 전복을 대상으로 오미자 및 히비스커스 용액을 사용하여 전복 박리 및 회복 효과를 조사한 결과, 3%와 4%의 오미자 용액에 노출된 전복은 각각 93.6% (850/908)와 97.1% (810/834)의 박리율을 보였으며 1분 15초 이내에 회복되었다. 3%와 4%의 히비스커스 용액에서는 각각 96.1% (780/812)와 97.4%(700/719)의 박리율을 보였고, 박리된 전복은 1분 39초 이내에 회복되었다. 이상의 결과, 오미자와 히비스커스 용액은 양식현장에서 전복을 박리하는데 실용적으로 사용 가능할 것으로 사료된다.

• Journal of Applied Biological Chemistry
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• 제63권1호
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• pp.61-67
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• 2020

식용 식물 35종의 생리활성 부위를 대상으로 70% 에탄올 추출물의 구강 세균(Streptococcus mutans, Lactobacillus casei, Staphylococcus epidermidis, Klebsiella pneumoniae)에 대한 항균 활성을 확인하였다. 35종의 식물추출물 중 항균 스펙트럼이 가장 넓고 최소저해농도가 낮은 히비스커스 꽃 추출물을 구강 세균에 대한 항균 소재로 최종 선발하였다. 히비스커스 추출물의 항균 활성은 산성 조건에서 안정하였고, 열 안정성이 우수하였다. 히비스커스 추출물의 총 폴리페놀 및 총 플라보노이드 함량은 130.5 및 25.7 mg/g으로 나타났고, 유리라디칼 소거활성과 환원력의 항산화 활성이 우수하였다.

• 한국의류산업학회지
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• 제17권3호
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• pp.476-485
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• 2015

The purpose of this research is to analyze the effects of persimmon juice and hibiscus flowers extract to perform combination dyeing of silk fabrics, with respect to color changes, fastness, and functionality. The optimal conditions as a result, were shown at 100% of dye concentration, $40^{\circ}C$ of dyeing temperature and 30 minutes of dyeing time while in terms of dye uptake depending on the kind of mordants and methods. The highest K/S value was recorded at pH 3, pre-mordants of $CuSO_4$, and $SnCl_2$, post-mordanting. After repeated dyeing and post-mordanting, various color change occurred with mordant treatments. Color fastness of dyed fabrics with hibiscus flowers extract was improve considerably by combination dyeing with persimmon juice extract. In aspects of functional properties, it showed excellent results of 99% deodorization rate, 99.9% Staphylococcus aureus rate and 99.9% Klebsiella pneumoniae.

• Journal of Plant Biotechnology
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• 제36권2호
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• pp.179-183
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• 2009

To understand the effect of reactive oxygen species (ROS) on floral senescence in Hibiscus syriacus L., we have investigated change in relative water potential, malondialdehyde (MDA) content, H_2O_2 content and the activity of antioxidative enzymes in the petals during flower opening and senescence. Hibiscus flowers were achieved full bloom at early morning and started to in-rolling and showed petal in-rolling over than 50% at 24 h and 36 h after full bloom, respectively. The flower was a decrease in fresh weight by 30% and showed water loss with floral senescence. MDA content and activity of antioxidative enzymes such as APX, GR and CAT were showed no significant change until 36 h after full bloom. In the flower 48 h after full bloom that showed complete petal in-rolling and wilting, however, activity of antioxidative enzymes and H_2O_2 content was greatly increased as compared with 0 h after full bloom. These results suggest that reactive oxygen species are related to accelerating the later senescence more than inducing the early senescence during Hibiscus flower senescence.

• Journal of Dairy Science and Biotechnology
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• 제38권1호
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• pp.37-44
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• 2020

The antimicrobial activity of the ethanol extract of Hibiscus sabdariffa L. (Roselle) powder against various food-borne pathogens was tested using the lawn diffusion assay. The results showed that the ethanol extract exhibited antimicrobial activities against Staphylococcus aureus (total inhibition), Salmonella enteritidis (partial inhibition), Listeria monocytogenes (partial inhibition), Escherichia coli (partial inhibition), Cronobacter sakazakii (partial inhibition), and Bacillus cereus (partial inhibition). Therefore, it is strongly recommended that Hibiscus sabdariffa L. (Roselle) should be considered for use as a natural food-grade additive for the inhibition of various food-borne pathogens, including both gram-positive and gram-negative pathogens, and the improvement of the overall quality of various dairy products, including milk.

• 생약학회지
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• 제28권3호
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• pp.112-116
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• 1997

Hibiscus syriacus L. (Malvaceae) is widely distributed over Korean, China, India and Siberia. The dried flower of Hibiscus syriacus is used as a folk medicine for curing of hematochezia, dysentery, obstruction due to wind-phlegm, regurgitation, and vomiting of food, and the dried root bark is used antipyretic, anthelmintic and antifungal agents. From a chloroform extract of root bark of this plant, compound I, II, and III were isolated and the structures were elucidated by various spectroscopic analyses. These compounds were identified as syringaresinol. E-N-feruloyltyramine, and Z-N-feruloyltyramine, respectively and were isolated from this plant for the first time. Compound II and III exhibited lipid peroxidation inhibitory activities with $IC_{50}$ of 15.5 and 28.6 ${\mu}g/ml$, respectively.

• 한국자원식물학회지
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• 제35권6호
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• pp.697-703
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• 2022

Under the COVID-19 pandemic, interest in immune enhancement is increasing. Although the immune-enhancing activity of plants of the genus Hibiscus has been reported, there is no study on the immune-enhancing activity of H. syriacus. Thus, in this study, we investigated the immune-enhancing activity of Hibiscus syriacus leaves (HSL) in mouse macrophages, RAW264.7 cells, and immunosuppressed mice. HSL increased the production of immunostimulatory factors such as nitric oxide (NO), inducible nitric oxide synthase (iNOS), interleukin-1β (IL-1β), and tumor necrosis factor-α (TNF-α) and activated the phagocytosis in RAW264.7 cells. The HSL-mediated production of immunostimulatory factors was dependent on toll-like receptor 4 (TLR4), p38, and c-Jun N-terminal kinase (JNK) in RAW264.7 cells. In the immunosuppressed mouse model, HSL increased the spleen index, the levels of the cytokines, and the numbers of lymphocytes, neutrophils, and monocytes. Taken together, HSL may be considered to have immune-enhancing activity and be expected to be used as a potential immune-enhancing agent.

• 한국자원식물학회지
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• 제19권1호
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• pp.144-149
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• 2006

본 연구는 나라꽃 무궁화의 아름다움을 나타내는 화색에 미치는 요인 중 토양산도와 무궁화의 화색특성과 생장과의 관계를 조사 연구함으로써 가장 이상적인 색깔을 갖추는 pH 범위를 파악하여 무궁화 화색육종 계획의 기초를 마련하고자 하였다. 토양산도별 생육특성을 조사하고 분석한 결과 홍화랑과 영광 품종은 pH 7에서 엽수가 183.73개와 135.87개로 가장 높게 나타났으며 pH가 증가함에 따라 증가하였다. 토양산도별 4품종의 화색변화를 조사하고 분석한 결과 홍화랑 품종은 pH가 높아짐에 따라 L값은 $17.05{\sim}12.26$로 점점 낮아졌으며 a값은 $16.37{\sim}20.91$로 점점 높게 나타났다.

• Advances in Traditional Medicine
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• 제5권4호
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• pp.331-335
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• 2005

The methanolic extract of Hibiscus vitifolius flowers (HVE), was evaluated for neurophamacological activities by carrying out rota rod, locomotor activity and traction performance in mice and swim endurance activity in rats in different dosages (10, 30 and 100mg/kg body weight). HVE showed a significant effect on central nervous system by increasing the time taken for rota rod, traction performance and locomotor activity while swimming time was found to be decreased when compared to normal control animals. These results suggest that HVE possess significant anxiolytic and anti depressant activity which may be attributed to the presence of flavonoid in HVE.