• Title/Summary/Keyword: Ha-Treatment

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Acidification and Biochar Effect on Ammonia Emission and Nitrogen Use Efficiency of Pig Slurry in the Vegetative Growth of Maize (Zea mays L.)

  • Lee, Seung Bin;Park, Sang Hyun;Lee, Bok Rye;Kim, Tae Hwan
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.42 no.1
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    • pp.47-53
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    • 2022

  • The objective of this study was to verify the effect of pig slurry application with acidification and biochar on feed value, nitrogen use efficiency (NUE) of maize forage, and ammonia (NH3) emission. The four treatments were applied: 1) non-pig slurry (only water as a control, C), 2) only pig slurry application (P), 3) acidified pig slurry application (AP), 4) acidified pig slurry application with biochar (APB). The pig slurry and biochar were applied at a rate of 150 kg N ha-1 and 300 kg ha-1, respectively. The AP and APB treatments enhanced all feed values compared to C and P treatments. The NUE for plant N was significantly increased 92.1% by AP and APB treatment, respectively, compared to the P treatment. On the other hand, feed values were not significantly different between AP and APB treatments. The acidification treatment with/without biochar significantly mitigated NH3 emission compared to the P treatment. The cumulative NH3 emission throughout the period of measurement decreased by 71.4% and 74.8% in the AP and APB treatments. Also, APB treatment reduced ammonia emission by 11.9% compared to AP treatment. The present study clearly showed that acidification and biochar can reduce ammonia emission from pig slurry application, and pig slurry application with acidification and biochar exhibited potential effects in feed value, NUE, and reducing N losses from pig slurry application through reduction of NH3 emission.

  • https://doi.org/10.5333/KGFS.2022.42.1.47 인용 PDF KSCI

Biodegradable Polymer-Nanoceramic Composite for Bone Regeneration

  • Kim, Sang-Soo;Park, Min-Sun;Kim, Byung-Soo
    • Proceedings of the Polymer Society of Korea Conference
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    • 2006.10a
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    • pp.179-179
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    • 2006

  • PLGA/HA composite scaffold fabricated by GF/PL method showed enhanced mechanical property, hydrophilicity and osteoconductivity compared with the SC/PL scaffolds, and this enhancement was most likely due to a higher extent of exposure of HA particles to the scaffold surface. The biodegradable polymer/bioceramic composite scaffolds fabricated by the GF/PL method could enhance bone regeneration efficacy for the treatment of bone defects compared with conventional composite scaffolds.

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