• Food Science and Industry
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• v.51 no.3
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• pp.245-258
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• 2018

Natural and synthetic antibacterial materials are used in foods to avoid bacterial contamination-induced food poison and deterioration. Due to the human and environmental safety, natural products including plant extracts have been extensively added into foods as antibacterial materials. Since some of core molecules comprised in those plant extracts are hardly dissolved in aqueous phases or food matrixes, nanotechnological approaches have been suggested to overcome such obstacles. Here we report domestic and international various types of plant- or non-plant-origin antibacterial materials that have been commercialized and used for the food industry. To improve solubility and stability of such antibacterial materials, nano-encapsulation or nano-complexation methods are also investigated focusing on the utilization of dextrins and proteins as coating materials.

• Journal of the Korea Furniture Society
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• v.26 no.1
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• pp.22-30
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• 2015

In order to prevent decay, distortion, bending, twist on wood products such as wooden furnitures, variety of coating materials were developed and used so far. The coating materials for wood finishing can be synthesized by natural resource or petroleum. However, these coating materials can cause contamination of indoor air quality due to emission of volatile organic compounds (VOCs). In this study, commercialized coating materials for wood finishing such as varnish, coat, and stain were evaluated on emission characteristics of VOCs. Among the varnish, eco-friendly products had about 15~46% lower TVOC emission ($1,042{\mu}g/m^2h{\sim}3,257{\mu}g/m^2h$, respectively, than typical product ($7,100{\mu}g/m^2h$). Natural resource based coating material showed lowest TVOC emission level. However, one of natural resource based waterborne stain showed higher TVOC emission level because waterborne stain already contained higher amount of natural VOC. Oil-based stain might not be suitable for indoor use on interior wall and furniture due to exceed amount of TVOC. Based on results, natural resource based coat or waterborne stain are recommenced to use on wood products.

• Food Science of Animal Resources
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• v.40 no.6
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• pp.863-880
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• 2020

Studies conducted in the past decade related to the use of natural antioxidants in meat products revealed the prevalent use of plant-based antioxidative materials added as powders, extracts, or dried or raw materials to meat products. The amount of antioxidative materials varied from 7.8 ppm to 19.8%. Extracts and powders were used in small amounts (ppm to grams) and large amounts (grams to >1%), respectively. Antioxidative materials used in meat products are mainly composed of phenolic compounds and flavonoids, which are able to inhibit lipid peroxidation of meat products, thereby preserving meat quality. However, the main ingredients used in processed meat products are the traditional additives, such as sodium erythorbate, sodium hydrosulfite, and synthetic antioxidants, rather than natural antioxidants. This difference could be attributed to changes in the sensory quality or characteristics of meat products using natural antioxidants. Therefore, novel research paradigms to develop meat products are needed, focusing on the multifunctional aspects of natural antioxidants.

• Bulletin of the Korean Chemical Society
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• v.27 no.6
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• pp.933-935
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• 2006

• Polymer Science and Technology
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• v.10 no.6
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• pp.763-772
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• 1999

• Journal of the Korean Chemical Society
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• v.57 no.2
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• pp.295-299
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• 2013

• Korean Journal of Materials Research
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• v.22 no.6
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• pp.285-291
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• 2012

Hydroxyapatite (HA) is well known as a biocompatible and bioactive material. HA has been practically applied as bone graft materials in a range of medical and dental fields. In this study, two types of dense hydroxyapatite ceramics were prepared from natural bones and synthetic materials. The biocompatibility of HA ceramics for supporting osteoblast cell growth and cytotoxicity using an in vitro MG-63 cell line model were respectively evaluated. Artificial hydroxyapatite shows relative density of 93% with 1-2 ${\mu}m$ after sintering, but a hydroxyapatite compact derived from bovine bone has low sintered density of 85% with a small content of MgO. Irrespective of the starting raw materials, both types of sintered hydroxyapatite displayed similar biocompatibility in the tests. FE-SEM observations showed that most MG-63 cells had a stellar shape and formed an intercellular matrix containing fibers on sintered HA. The cells were well attached and grown over the HA surface, indicating that there was no toxicity.

• Journal of the Korean Society of Costume
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• v.41
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• pp.117-138
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• 1998

This study can be divied into three major sections: 1. Background on the 1980s : The 1980s can be characterized as a era of rising expectations over the quality of life. Interest in art, history, culture, and new technology increased to appeal to a greater audience. In fashion, these changes led to greater focus on quality and unique stylishness as fashion represented a medium through which luxury and refined tastes could be expressed. 2. Textile Trends of the 80s Divided into 4 Periods : The period of 1980-82 saw the mixture of natural lines with constructive lines. The textiles used in fashions in this period can be characterized by natural materials, mannish materials of the 1950s, feminine materials of the 1920s and 30s, and spoty materials of the 1960s. The period of 1983-85 was an avante garde period which used rustic avante-garde materials and art craft materials. The period of 1986-87 can be described as minimalistic and neo-classical which incorporated materials which represents a metropolitan feel, retro decorative materials and sporty, futuristic mat-erials. Lastly, the period of 1988-89 produced ethnic and natural fashions which relied on traditional British materials, country elegant and innocent look fabrics, ethinic and ecology-minded materials, in addition to comfortable and sports casual materials. 3. Characteristrics and methods of expression for textiles in the 1980s, : In the 1980s, the development of textiles have can be divided into 4 distinct patterns: decorative materials, sporty materials. In generals textiles have increased in their decorative nature-especially decoration by texure. Textile have also incorporated the mixture of contrasting themes in order to create new fabrics.

• Journal of the Korea Furniture Society
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• v.23 no.1
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• pp.1-9
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• 2012

Sustainable furniture designs are expressed through reutilization, reuse or redesign of the whole of part of natural materials and existing products. These designs contain natural emotions and show those propensities such as uncertainty, integrity, essentiality and experimental natures. Designs that use natural materials such as wood, bamboo, cork, plants, stones and water have sufficient beauty in themselves and thus these materials are not specially processed but their essence is pursued in those designs. Of those materials, the natural material water is used to pursue the essence of aqua while presenting a new furniture design through an experimental method. The circularity of aqua shares its meaning with the circularity of sustainable designs. In addition, the liquidity of aqua will be grafted onto IT technology to express variable shapes in order to present a new direction of furniture designs.

• Bulletin of the Korean Chemical Society
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• v.25 no.2
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• pp.243-248
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• 2004

As diverse synthetic precursors of cyclic adenosine diphosphate ribose (cADPR), several adenosine derivatives in which azido or amino group is introduced at 2'- or 3'-position of the sugar moiety of adenosine were prepared from readily available adenosine via conventional protocols. These synthetic sequence employs very efficient reactions conditions that proceed at or below ambient temperature with actual yields of >80% for each individual step.