• Title/Summary/Keyword: BIO

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Fall Performance of Korean Lawngrass (Zoysia japonica Steud.)as affected by Bio -fertilizer Application (발효계분비료시용이 들잔디(Zoysia japonica Steud.)의 추계생장양상에 미치는 영향)

  • 심재성;정원일
    • Asian Journal of Turfgrass Science
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    • v.4 no.2
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    • pp.77-83
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    • 1990

  • The effect of bio-fertilizer, which was manufactured poultry manure, on the fall performance of Korean lawngrass was determined on a clay loam soil. Plant length was characterized by increasing the amount of bio-fertilizer applied. This trend was also true in dry matter yield of tops during the experimental period from August 31 through October 30. Both tiller numbers and stolon length steadily increased with increasing amount of bio-fertilizer applied, and 40m/t application of bio-fertilizer was found to be most effective on both components. performance shown on November 5 was prominent for both green leaf and root weights when the increased amount of bio-fertilizer was applied. Korean lawngrass had three times as much green leaf weight with 40m/t application of bio-fertilizer as with other treatments. Several functions of increment of above- ground part components caused by increasing root weight, which is greatly affected by bio-fertilizer application, was discussed. Turf quality was much improved by applying bio-fertilizer, indicating that this fertilizer might play an improtant role in respect of soil structure, water retention etc.

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A Study on the Characteristics of Spark Ignition Engine Cleanliness by Low Level Bio-Alcohol Blending (저농도 바이오알코올 혼합에 따른 스파크 점화 엔진 청정 특성 연구)

  • CHA, GYUSOB;NO, SOOYOUNG
    • Transactions of the Korean hydrogen and new energy society
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    • v.30 no.5
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    • pp.428-435
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    • 2019

  • A comparative evaluation of engine cleanliness was performed on the transport gasoline blended with bio- alcohols, and this study was considered to achieve the aim of greenhouse gas reduction in Korea. In particular, the fuel blended with bio-ethanol and bio-butanol showed the best engine cleaning performance both on combustion chamber deposits and intake valve deposits. The deposit control gasoline additive was effective to remove intake valve deposits. In contrast, the amount of combustion chamber deposits were tend to increase even though fuels blended with bio-alcohols were used. In overall, fuels blended with bio-alcohols, compared to fossil fuels, still showed outstanding performance in terms of engine cleanliness.

  • https://doi.org/10.7316/KHNES.2019.30.5.428 인용 PDF KSCI

Physical Properties of Agro-Flour Filled Aliphatic Thermoplastic Polyester Bio-Composites

  • Eom, Young Geun;Kim, Hee Soo;Yang, Han Seung;Kim, Hyun Joong
    • Journal of the Korean Wood Science and Technology
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    • v.32 no.3
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    • pp.71-78
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    • 2004

  • The purpose of this study was to investigate the water absorption and thickness swelling of biocomposites at room temperature. These properties of bio-composites mainly depend on the ability of the agro-flour to absorb water through hydrogen bonding between water and the hydroxyl groups of the holocellulose and lignin in the cell wall. As the content of agro-flour increased, the water absorption and thickness swelling of the bio-composites increased. The effects of agro-flour content and rice husk flour (RHF) particle size on the water absorption and thickness swelling of the bio-composites were evaluated. In general, wood-based materials showed significantly higher water absorption and thickness swelling than the bio-composites. This might be attributed to the ability of the polybutylene succinate (PBS) hydrophobic polymer to prohibit the water absorption and thickness swelling of the bio-composites, Therefore, the use of agro-flour filled PBS bio-composites, which exhibit improved dimensional stability in comparison with wood-based materials, is recommended.

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