• Korean Journal of Materials Research
• /
• v.19 no.5
• /
• pp.270-275
• /
• 2009

Lotus-type porous nickel with cylindrical pores was fabricated by unidirectional solidification under an Ar gas atmosphere using the thermal decomposition method of the compounds such as sodium hydroxide, calcium hydroxide, calcium carbonate, and titanium hydride. The decomposed gas does form the pores in liquid nickel, and then, the pores become the cylindrical pores during unidirectional solidification. The decomposed particles from the compounds do play a rule on nucleation sites of the pores. The behavior of pore growth was controlled by atmosphere pressure, which can be explained by Boyle's law. The porosity and pore size decreased with increasing Ar gas pressure when the pores contain hydrogen gas decomposed from calcium and sodium hydroxide and titanium hydride, ; however it they did not change when the pores contain containing carbon dioxide decomposed from calcium carbonate. These results indicate that nickel does not have the solubility of carbon dioxide. Lotus-type porous metals can be easily fabricated by the thermal decomposition method, which is superior to the conventional fabrication method used to pressurized gas atmospheres.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.37 no.12
• /
• pp.1622-1626
• /
• 2008

This study was carried out for the analysis of chemical composition and antioxidative activity of lotus leaf. The lotus leaf contained 63.8% of crude carbohydrate, 16.9% of crude protein, 1.0% crude fat, and 9.3% of crude ash including high amount of calcium (2.2%). The antioxidative effect of several solvents extracts of lotus leaf was investigated. Among them 70% ethanol extract showed relatively higher extraction yield and higher total phenol content as well as the highest electron-donating ability using 1,1-diphenyl-2-picryl hydroxyl.

• The Korean Journal of Food And Nutrition
• /
• v.29 no.5
• /
• pp.684-691
• /
• 2016

In this study, we analyzed the biochemical factors in lotus (Nelumbo nucifera) leaf, stem, and yeonjabang and their effects on serum factor levels in mice fed a high-fat (HF) diet. The loutus leaf showed $9.47{\pm}0.30%$ moisture content, $8.25{\pm}0.39%$ ash, $21.45{\pm}1.25%$ crude protein, and $2.21{\pm}0.13%$ crude fat content; the lotus stem showed $11.84{\pm}0.43%$ moisture, $10.21{\pm}0.64%$ ash, $17.55{\pm}0.92%$ crude protein, and $4.16{\pm}0.23%$ crude fat content; and the lotus yeonjabang showed $11.86{\pm}0.50%$ moisture, $6.81{\pm}0.51%$ ash, $18.71{\pm}1.02%$ crude protein, and $3.95{\pm}0.15%$ crude fat. Blood triglyceride levels were higher in the HF group ($146.43{\pm}38.81mg/dL$), and lower in the HF+yeonjabang groups ($98.00{\pm}17.18mg/dL$). In particular, blood triglyceride levels were significantly lower in the groups that had 10% dry yeonjabang powder added to the high-fat diet. The inclusion of excessive high-fat diet increased concentrations of serum insulin and leptin. Serum leptin concentrations were highest in the HF group mice ($3.00{\pm}1.35ng/dL$), whereas they were significantly lower in the HF+yeonjabang groups by $1.34{\pm}0.52ng/dL$ (p<0.05). Thus, addition of dry yeonjabang powder to the high-fat diet was more effective in regulating the levels of serum triglycerides and leptin in mice. Additional studies would help in the development of yeonjabang as a functional food.

• Journal of The Korean Society of Grassland and Forage Science
• /
• v.14 no.4
• /
• pp.288-294
• /
• 1994

Seedling vigor of introgressive hybrids between birdsfoot refoil 'MO-20"(Lotus corniculatus) used as the maternal parent and tetraploid(2n=4x=24)accession PI302921 narrowleaf trefoil(Lotus corniculatus L.), and parents were compared in terms of dry matter accumulation , net photosynthetic rate, dark respiration rate, and growth analysis. The hybrids showed better seedling vigor than PI302921 as they had lower dark respiration rate and higher relative growth rate (RGR) than PI302921. Hybrids grew faster than MO-20, but there was not significant difference between them. Net photosynthesis per unit area increased during three weeks after emergence without difference among the entries, then decreased sharply with leaf age and shading marking much differences among entries Dark respiration rate was very high just after emergence, after which it decreased rapidly until it reached a stable level at 1 week through 3 weeks of age, and then dropped again. In general, dark respiration, photosynthesis, and seedling growth of the hybrid was similar to those if MO-20. Although there are some reports about interspecific hybrids of Lotus species, it still remains as a new area for genetic improvement of seedling vigor of L. corniculatus.atus.

• Korean Journal of Plant Resources
• /
• v.33 no.6
• /
• pp.666-674
• /
• 2020

Lotus (Nelumbo nucifera Gaertn.) is an economically important aquatic ornamental herb with multiple uses, including food, tea, natural pigments, and/or healthcare product. The objective of this study was to evaluate the physicochemical properties and antioxidant potential of lotus sprouts grown in three media: sprouting machine (LSSG), soil (LSSC), and mud (LSMC). The longest sprout was obtained in LSMC (4.79 and 26.79 cm) followed by LSSC (1.95 and 5.4 cm), and LSSG (0.60 and 2.85 cm) at 5 and 10 days, respectively. Higher amounts of total free amino acids were found in cotyledons (33.96, 21.45, and 38.90 mg/g) than in hypocotyls (15.77, 7.90, and 15.29 mg/g ) for LSSG, LSSC, and LSMC, respectively. The ratios of total essential to total non-essential amino acids were higher in hypocotyls (0.36, 0.31, and 0.46) than in cotyledons (0.34, 0.25, and 0.40), respectively. Similarly, the total polyphenol content of the hypocotyl of LSMC (50.33 ㎍ GAE/g) was the highest and that of the husk of LSSG (24.08 ㎍ GAE/g) was the lowest. Overall, the antioxidant potential of hypocotyl was higher than that of husk and cotyledon. The results indicated that the lotus sprouts grown in mud could be a good source of nutritional and natural antioxidants.

• Polymer(Korea)
• /
• v.37 no.4
• /
• pp.411-419
• /
• 2013

Various biomaterials have been widely used for biomedical applications, including bio-organs, medical devices, and clinical devices like vessel, blood pumps, artificial kidneys and hearts, even in contact with blood. The issue of blood compatibility has been studied intensively to prevent negative effects such as thrombosis due to the implanted devices. The use of lotus-leaf-like structured surfaces has been extended to an increasing number of applications such as contamination prevention and anticorrosion applications. Various methods such as template, sol-gel transition, layer-by-layer, and other methods, developed for the fabrication of lotus-leaf-like surfaces have been reported for major industrial applications. Recently, the non-wettable character of these surfaces has been shown to be useful for biomedical applications ranging from blood-vessel replacement to antibacterial surface treatment. In this review, we provide a summary of current and future research efforts and opportunities in the development and medical applications of lotus-leaf-like structure surfaces.

• The Korean Journal of Food And Nutrition
• /
• v.30 no.4
• /
• pp.771-779
• /
• 2017

The purpose of this study was to investigate and analyze the total phenolic content (TPC), antioxidant activities (FRAP, ABTS, and DPPH), and antibacterial properties of lotus (Nelumbo nucifera) extracts. Lotus leaves, stems, and seed pods were extracted with deionized water at $95^{\circ}C$, and with 70.5% ethanol at $85^{\circ}C$. The TPC ranged from 8.12 to 215.12 GAE mg/g. The ethanol extract of the seed pod had the highest TPC, and the TPC of the corresponding deionized water extract was 161.45 mg/g. FRAP values ranged from 104.03 to $3,546.39TEAC\;{\mu}mol/g$, ABTS radical cation scavenging activities ranged from 105.11 to $3,956.94TEAC\;{\mu}mol/g$, and DPPH radical scavenging activities ranged from 37.29 to $2,549.46TEAC\;{\mu}mol/g$. $EC_{50}$ values ranged from 0.26 to 9.63 mg/mL, and 0.31 to 21.21 mg/mL for ABTS and DPPH, respectively. The ethanol and deionized water extracts of the seed pod showed higher TPC and stronger antioxidant properties (FRAP, ABTS, and DPPH) than those of characteristic of the leaf extracts. The ethanol and deionized water extracts of the seed pod showed antimicrobial activity against Bacillus subtilis, Staphylococcus aureus, and Pseudomonas aeruginosa with inhibition zones of 9.0 to 14.0 mm, and the ethanol extract of the leaf showed antimicrobial activity against B. subtilis and S. aureus with inhibition zones of 9.0 and 10.0 mm, respectively. Thus, the lotus seed pod could be used to produce novel teas, and could be a potential source of therapeutic ingredients for food and medicine.

• Journal of The Korean Society of Integrative Medicine
• /
• v.11 no.1
• /
• pp.43-51
• /
• 2023

Purpose : This study suggests that the unique chakra arrangement of Tibetan singing bowls resembles the mantra of chakra lotus in the tantric tradition and the structure of chakra ascent, The two aim at the liberation of consciousness and confirm that they have a body, mind, and conscious healing mechanism. Methods : First, the structural characteristics of Tibetan singing bowls arrangement and chakra lotus mantra arrangement were investigated through the consideration of previous studies. Next, the healing mechanism of Tibetan singing bowls, which has been learned in Nepal, was examined through previous studies and literature to clarify that the rise of chakra in the two systems has a balance of body, mind, and consciousness and aims at liberation of consciousness. Results : The arrangement of Tibetan chakras is similar to the mantra of chakra lotus. Both have a structure in which the auxiliary sound of the previous chakra is interlocked with the structure of being the main sound of the next chakra to raise the chakra. At this time, the rise of the chakra is the liberation of consciousness by the ultimate purpose. Conclusion : Tibetan chakra are structurally similar to chakra lotus mantras and chakra ascents, as they have a theoretical background to tantric traditions. Chakra is the quality of inner consciousness that is conveyed to the outside and expressed in its own actions. Therefore, chakras should be well coordinated to lead our lives healthily. In this point, the chakra arrangement of Tibetan singing bowls is a system that exposes the inner balance to the outside and heals us more directly. Therefore, Tibetan singing bowls therapy has an integrated medical value in restoring our mind and body balance. Because chakras are dimensions of consciousness, the study of chakras is abstract or lacking, so more systematic and scientific study of chakras is needed.

• Journal of Life Science
• /
• v.21 no.12
• /
• pp.1732-1739
• /
• 2011

This study was carried out to investigate the effect of lotus root and leaf powder on the quality characteristics of pork patty stored at $3^{\circ}C$ for 9 days. The pork patties were of four types: nothing added(control, T0), 0.5% lotus root powder added (T1), 0.25% lotus root and 0.25% lotus leaf powder added (T2), and 0.5% lotus leaf powder added (T3). The $a^*$ value tended to decrease with longer storage period (p<0.05). The $L^*$ and $a^*$ value of T3 had the lowest value among the samples, the $b^*$ value T2 and T3 were higher than those of T0 and T1 (p<0.05). Water holding capacity decreased with longer storage period (p<0.05), the water holding capacity, cooking loss, increase rate of thickness and decrease rate of diameter were not significantly different among the samples. Hardness and chewiness increased and springiness decreased with longer storage period (p<0.05). The pH creased with longer storage period (p<0.05), but the VBN content not changed during storage. The TBARS values increased with longer storage period (p<0.05), and those of T0, T1, T2 and T3 were 4.57, 1.85, 0.43 and 0.41 mg MA/kg, respectively, after 9 days of the storage. The result suggest that the addition of lotus root and leaf powder at the same time, or addition of lotus leaf powder can be applied to pork patty to its functionality.

• Food Engineering Progress
• /
• v.13 no.3
• /
• pp.195-202
• /
• 2009

This study was accomplished that analysis of seven polycyclic aromatic hydrocarbons (PAHs) in smoked or nonsmoked processing foods by high performance liquid chromatography (HPLC) with fluorescence detection. The calibration line was constructed with injected different levels of standard concentration. Limit of detection (LOD) and limit of quantification(LOQ) showed higher linearity ($r^{2}$=0.998) reasonably, and recovery exhibited 0.033-0.666 $\mu$g/kg, 0.108-2.217 $\mu$g/kg and 69.31-90.14%, respectively. As a result, the samples using smoked tuna as smoked materials contained seven PAHs with different range from 0.256 to 0.486 $\mu$g/kg. The benzo[a]pyrene, indicator of PAHs, was detected to below the LOQ in two samples. Concentrations of benzo[a]pyrene in three samples were below the 2 $\mu$g/kg which is the limit of regulation. Smoked tuna sauces were detected from 0.321 to 0.552 $\mu$g/kg and not detected in drying powders. PAHs of smoked meat products were ranged from 0.720 to 2.027 $\mu$g/kg and are higher than concentration of tuna smoked samples. PAHs were very low in non-smoked foods including mustard, herb, and roasted meats.