• 한국약용작물학회지
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• 제22권2호
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• pp.121-126
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• 2014

This study was designed to evaluate antioxidant activity of Curcuma longa L. leaves treated by ultra high pressure extraction. Curcuma longa L. leaves was subjected to 5,000 bar for 5 and 15 min at $25^{\circ}C$ The highest phenolics and flavonoids content was observed in the treatment of high pressure extraction for 15 min ($308.28{\mu}g/mg$, $124.33{\mu}g/mg$). The DPPH scavenging activity was 82.34% at $1.0mg/m{\ell}$ of Curcuma longa L. leaves treated by ultra high pressure process for 15 min. The highest SOD-like acitivity of Curcuma longa L. leaves ($1.0mg/m{\ell}$) was observed at ultra high pressure extraction for 15 min (67.54%). The high pressure extraction significantly increased the contents of phenolics and flavonoids and also enhanced the antioxidant activity. These results provide useful information for enhancing biological properties of Curcuma longa L. leaves.

• Journal of Applied Biological Chemistry
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• 제66권
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• pp.338-344
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• 2023

Curcuma longa is a plant belonging to the genus Curcuma and is distributed across various Asian regions. This plant is widely known for its rhizomes, which possess a variety of pharmacological properties. However, although the leaves and stems of this plant also contain several health-promoting secondary metabolites, very few studies have characterized these compounds. Therefore, our study sought to quantify the secondary metabolites from the leaves and stems of Curcuma longa L. (LSCL) using liquid chromatography-electrospray ionization-mass spectrometry (LC-ESI-MS) and high-performance liquid chromatography (HPLC). Our LC-ESI-MS analyses detected twenty-one phenolic compounds in the LSCL, among which fifteen compounds were detected via HPLC analysis. Four compounds, namely vanillic acid (0.129 mg/g), p-coumaric acid (0.431 mg/g), 4-methylcatechol (0.199 mg/g), and afzelin (0.074 mg/g) were then quantified. These findings suggest that LSCL is rich in secondary metabolites and holds potential as a valuable resource for the development of functional and nutritional supplements in the future.

• 한국자원식물학회지
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• 제26권4호
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• pp.450-456
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• 2013

파종기에 따른 울금의 초장, 경직경 및 엽수는 5월 10일 파종구에서 가장 양호하였다. 생육단계에 따른 울금의 생육변화를 살펴본 결과 울금의 생육최성기인 10월에 초장은 121 cm로 가장 길게 나타났고, 경직경 또한 3.45 cm로 가장 두꺼웠다. 엽수는 9월 20일 6매로 조사되었으나 이후 엽수가 감소함이 관찰되었다. 생육단계에 따른 울금 지하경 무게 변화는 생육기간에 경과함에 따라 지하경의 무게 증가가 비례하였으며, 11월 20일 조사에서 울금의 수량이 가장 크게 나타났다. 울금을 건조하는데 가장 적합한 온도는 $40^{\circ}C$로 확인되었다. 부형제를 달리하여 제조한 울금환의 관능검사 결과는 향, 색, 맛, 조직감 및 종합적 기호도에서 찹쌀과 꿀을 부형제로 사용한 시험구의 기호도가 가장 우수하였으며 밀가루만을 사용한 시험구의 선호도는 낮게 나타났다.

• 한국약용작물학회지
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• 제22권4호
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• pp.255-261
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• 2014

Cosmetic activities of the leaves of Curcuma longa L. were compared according to different drying methods, to expand the use of the by-products of Curcuma longa L. The highest extraction yield of 29.4% was obtained from vacuum drying process (VD), whose value was very close to 29.2% from freeze drying process (FD). Relatively lower extraction yield were observed as 24.5% and 25.3% from the raw leaf (RL) as control and hot air drying process (HD). The cytotoxicity was observed lower FD and VD than RL and HD. It shows that cytotoxicity was closely related to cosmetic activities such as tyrosinase and melanin inhibition activities by showing much better cosmetic activities of the extracts from both FD and VD than those from the RL and HD. It was interesting that was differences of the cosmetic activities and cytotoxicity between FD and VD, which implies that VD method should be a more efficient process than FD method in terms of drying time and operation costs: 6 hours vs 24 hours and 3-5 times higher extraction costs in drying. It was observed that VD is more excellent dry method than others. This result could be utilized to effectively dry other soft plant biomass.

• Journal of Plant Biology
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• 제33권3호
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• pp.169-172
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• 1990

The epidermal structure and development of stomata in four taxa of Zingiberaceae viz: Aframomum melegueta K. Schum, Aframomum sceptrum K. Schum, Curcuma longa L. and Zingiber officinale Rosc. have been investigated. Unicellular, eglandular trichomes are observed on the epidermis of A. sceptrum and Z. officienal. Anomocytic stomata with agenous ontogeny, paracitic stomata with eumesogenous ontogeny and tetracytic stomata with mesoperigenous ontogency are recorded in Z. officinale, Aframomum species and C. longa respectively. Stomata of Z. officinale are the smallest in size (20.6$\times$14.3$\times$10.5${\mu}{\textrm}{m}$) while those of C. longa are the largest (42.5$\times$31.5$\times$20.2${\mu}{\textrm}{m}$). These two taxa also recorded the highest (43.7/mm2) and lowest (28.6/mm2) stomatal frequency respectively which suggests a linear regression of frequency on size.

• International Journal of Industrial Entomology and Biomaterials
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• 제18권1호
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• pp.49-52
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• 2009

An in vitro and in vivo studies were conducted to evaluate the antibacterial efficacy of certain botanicals viz., rhizomes of turmeric (Curcuma longa) and leaves of amla (Phyllanthus emblica), asparagus (Asparagus racemosus), bael (Aegle marmelos), boerhavia (Boerhavia diffusa), garlic (Allium sativum) and basil (Oscimum basicilum) against bacterial pathogens viz., Staphylococcus sp., Bacillus sp. and Klebsiella cloacae, of silkworm, Bombyx mori. Asparagus and basil, amla and boerhavia, basil and bael at concentration of 20, 000 ppm showed higher antibacterial activity against Staphylococcus sp., Bacillus sp., K. cloacae respectively, both in vitro and in vivo studies.