• Journal of Digital Convergence
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• v.18 no.8
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• pp.479-484
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• 2020

In the social atmosphere where the importance of appearance is increasing day by day, efforts and desires of modern people are becoming more active and diversified, and the beauty beauty industry is gradually becoming more specialized and specialized due to these effects. Hair damage is inevitable due to the excessive permanent wave or hair coloring of modern people. However, as the hair is damaged, the cuticle peels off and falls off, and the tensile force decreases and the satisfaction after hair styling or perm decreases relatively. Therefore, it is necessary to manage damaged hair, but since artificial synthetic products occupy most of hair treatment agents on the market, it is necessary to develop a hair treatment product containing antioxidants useful for the human body. In this study, the effect of maple leaf extract on the mechanical change of colored hair was analyzed to investigate the potential of maple leaf extract as a hair treatment agent to improve damaged hair and improve hair health. It is considered that this study will be used as basic data for the development of hair beauty products using natural products in the future.

• Journal of the Korean Ceramic Society
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• v.36 no.1
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• pp.1-6
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• 1999

Mullite was synthesized by adding industrial by-products, Al(OH)3 and boehmite, to a natural kaolin of pink A-grade. The attrition milling method, which has simultaneously milling and mixing effects, was carried out. The specimens were formed by uni-axial pressing of 1.5 ton/$\textrm{cm}^2$ and then fired. When the Al(OH)3 was added, the flexural strength of 71.8 wt% Al2O3 specimen fired at 1600$^{\circ}C$ for 4 hrs was 22.3 MPa and the amount of synthesized of 71.8 wt% Al2O3 specimen fired at 1600$^{\circ}C$ for 10 hrs was about 85%. When the boehmite was added, the flexural strength of 68 wt% Al2O3 speciment fired at 1600$^{\circ}C$ for 10 hrs was 147 MPa, and the high purity mullite of about 95% was synthesized for 71.8 wt% Al2O3 specimen fired at 1600$^{\circ}C$ for 10 hrs.

• Journal of the Korea Institute of Building Construction
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• v.14 no.3
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• pp.237-243
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• 2014

The environmental problem is serious due to global warming In a concrete industry, the effort to reduce the problem of the destruction of environment arising from the indiscriminate use of limestone that is the raw material of cement and aggregate and the exhaustion of resources are continually emphasized In this research, the waste porcelain and waste glass that are the natural aggregate substitute materials were mixed and were applied. In addition, the magnesia phosphate composite and fly ash are mixed with a cement substitute material and the properties of the artificial stone was examined. Density, water absorption, rate of aggregate on the surface, compressive strength, and flexural strength were performed. As a result of the test, it is that waste glass with 60% and waste porcelain with 70% are the most excellent mix to produce the artificial stone.

• Korean Journal of Environment and Ecology
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• v.20 no.1
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• pp.70-74
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• 2006

To study for proper growing conditions of Hydrangea macrophylla var. acuminata, used as ornamental trees or sources of natural sweetenings and biological active compounds, two-year-old cuttings of the plant were subjected to different conditions, light intensity, watering, and fertilizing levels. Photosynthetic rates measured on October 2 differed significantly between two light intensity regimes, but the values measured on September 3 were not significantly different. Mean photosynthetic rates on the plot watered three times a week were higher than the cuttings on the plot watered once a week. Mean photosynthetic rates on the plot fertilized 200grams/cuttings were slightly higher than those of the cuttings on the control plot. Chlorophyll contents measured on August 2 and on September 3 were significantly different between the light intensity regimes. Chlorophyll contents measured on August 2 were significantly different between the moisture regimes, but not significantly different between the fertilizing levels. Means of leaf growth(length and width) measured the highest values on the plot watered three times a week, and on the plot in full-sun lighted.

• Journal of the Korean Chemical Society
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• v.19 no.2
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• pp.142-146
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• 1975

The formation of iron oxide hydroxide in a ferrous sulfate was studied in different contents of iron in the solution at a temperature range of 90 to $100^{\circ}C$ under 1${\sim}$3 atmospheres. The Mohr's salt thus formed was hydrolyzed under 1 to 3 atmospheres, in 14 to 72 g/l of iron content in the solution pH 3 or 6 for two hours at 90 to $100^{\circ}C$. The results obtained was as follows; 1) In Mohr's salt solution, as the iron content was increased, with decreasing the concentration of hydrogen ion, the yield of iron oxide hydroxide was gradually increased. 2) When iron content in Mohr's salt solution was 42.81 g/l, 91.5% of iron was recovered in the form of $\alpha$-goethite similar to yellow grade of natural goethite. 3) When $\alpha$-goethite obtained was calcined of $500^{\circ}C$, it was turned into ${\alpha}$-ferric oxide with a redish brown colour.

• Journal of Life Science
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• v.22 no.10
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• pp.1339-1343
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• 2012

Atopic dermatitis is characterized by chronically pruritic and inflammatory dermatitis. In this study, we investigated the effect of Platycodon grandiflorum including platycodin D (PG-Platycodin D) in an atopic dermatitis-like mouse model. An atopic dermatitis-like skin lesion was induced by repeated treatment of 2,4-dinitrochlorobenzene (DNCB) on the dorsal skin of ICR mice. The efficacy of PG-Platycodin D was tested by observing scratching behavior, the skin severity score, and histopathologic analysis. PG-Platycodin D reduced the DNCB-induced increase in scratching behavior and the skin severity score. In addition, histopathologic analysis revealed a reduction in the thickening of the epidermis in the PG-Platycodin D group. These results may contribute to the development of a therapeutic drug for the treatment of atopic dermatitis.

• Applied Biological Chemistry
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• v.35 no.5
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• pp.404-409
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• 1992

Hydroxypropylated starches and acetylated starches were prepared by reaction of potato starch with propylene oxide and acetic anhydride, respectively and then degree of retrogradation and swelling power were investigated in different pHs and temperature. The extent of retrogradation determined by glucoamylase method during freeze-thaw treatment and storage in low temperature $(0{\sim}5^{\circ}C)$ showed that modified potato starches were slowly retrograded as the increase of degree of substitution. The order of the retrogradation tendencies in different pHs were pH 4>pH 6>pH 8>pH 10. Retrogradation of hydroxypropylated potato starches were less than that of acetylated potato starches. Swelling power of starches were influenced more by the temperature than by the pH. The order of the swelling power tendencies in different pHs were pH 10>pH 2>pH 8>pH 4>pH 6.

• Resources Recycling
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• v.25 no.5
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• pp.44-49
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• 2016

Flue gas desulfurization(FGD) is an effective technique to remove $SO_2$ gases of coal-fired plants. Limestone is usually used as desulfurizing agent. In this study, we use the limestone sludge which is a by-product of steel industry in order to replace desulfurizing agent of FGD process. Physical and chemical characteristics analysis of desulfurizing agent was conducted. Desulfurizing agent using limestone sludge was fabricated by pre-treatment process and, then the agent was used on FGD process. Consequently, the tendency on the $SO_2$ concentration did not appear. And limestone sludge was considered as possible alternative agent for flue gas desulfurization process through absorber control system.

• Resources Recycling
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• v.4 no.1
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• pp.4-11
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• 1995

The amounts of waste stone and stone powder sludge that occurred in the quarry and processing plant of s stone plates, have been increased with the development of stone industry. The manufactunng process of 따tificial s stone was studied to reduce the outlet of these wastes and utilIze them as raw materials for architecture, interior decoration and art work. In order to compare the properties of artiflcial stone with those of natural building-stone, the physi$\alpha$II properties of artificial stone such as specific gravity, absorption ratio, elastic wave velocity, compressive s strength, tensile strength, shore hardness, elasticity and Poission's ratio were measured. From the mesaured d data of physical properties, it was found that physical propertIes of artificial stone were controlled by homogeneous m mixing ratio of constituents, molding pressure, and amount of binder. Also, from the thermo-gravimetric analysis, it was found that artIfIcial stone manufactured had a good thermal stability up to $300^{\circ}C$. It was concluded that t the optimum conditions for manufacturing process of artificial stone were $200kg/\textrm{cm}^2$ of molding pressure, 12-15 w weight % of binder amounts.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.41 no.4
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• pp.295-302
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• 2015

A novel microcapsule/emulsions for cosmetics was studied. Our present studies demonstrate that the biopolymer-stabilized microemulsion composed of polysaccharide and protein can encapsulate and stabilize remarkably coenzyme-Q10 (Q10). Polysaccharide and protein complex were incorporated in the microcapsule in order to reinforce the physical strength of the microspheres. We compared the long-term stability of the activity of Q10 in biopolymer-stabilized microemulsion. There was no noticeable negative effect on the activity of Q10. Optical microscope (OM) and transmission electron microscope (TEM) showed that microcapsules were spherical and had a smooth surface. Consequently, the polysaccharide/protein emulsion produced in this study may be beneficial in improving the emulsion stability and the protection capability of labile substances.