• Proceedings of the Korean Society for the Gifted Conference
• /
• 1998.10a
• /
• pp.115-129
• /
• 1998

• Railway Journal
• /
• v.18 no.2
• /
• pp.107-114
• /
• 2015

• 한국보건간호학회:학술대회논문집
• /
• 1997.12a
• /
• pp.59-60
• /
• 1997

• Railway Journal
• /
• v.19 no.5
• /
• pp.33-38
• /
• 2016

• Monthly Duck's Village
• /
• s.9
• /
• pp.14-15
• /
• 1999

• Proceedings of KHEA Conference
• /
• 2007.06a
• /
• pp.91-91
• /
• 2007

• Journal of the Korean Society of School Health
• /
• v.8 no.1
• /
• pp.25-57
• /
• 1995

• Proceedings of the Korean Society of Crop Science Conference
• /
• 2020.11a
• /
• pp.8-8
• /
• 2020

• Journal of the Mineralogical Society of Korea
• /
• v.22 no.4
• /
• pp.297-305
• /
• 2009

Ores of the Jeonnam pyrophyllite province mainly consist of not only pyrophyllite but also kaolinite, and they usually contain minor amounts of muscovite and quartz. We usually call them as porcelaneous stones which usually show lower grade characteristics in the viewpoint of Korean nonmetallic industries. Mineralogical studies for the ores and their intimate formations revealed that another kind of clay minerals could have been produced from the volcanic sediments with similar ages and compositions. Corundum is commoner than the diaspore in the pyrophyllite deposits, and so diaspore can be regarded as one of temporary minerals from which corundum would be finally formed. Kaolinite deposits contain neither diaspore nor corundum, but alunites produced by an advanced argillic alteration are often observed in the upper portions of the kaolin ores. The lowest formation interbedded with pyrophyllite and/or kaolinite ores usually contain purple tuff bed on the uppermost part, and in ascending order, siliceous formation, fine ash tuff and lapillistone are found in the study areas. As ages are becoming younger, amounts of pyrophyllite and kaolinite are radically decreased, or disappeared completely. On the other hand, content of muscovite is slightly increased, and those of plagioclase feldspars and quartz are found to have been preserved from the original rocks during alteration process. Most of ore bodies show rather well bedded formations which are easily discernable in the outcrops, but more effective discremination is desirable where rather massive ores exist. Siliceous beds and purple tuff ones on the upper part of ore bodies would be useful as marker horizons or key beds which have distinct lithologies and extensions.

• Journal of Bio-Environment Control
• /
• v.32 no.4
• /
• pp.423-433
• /
• 2023

As aerial application increasing, with social concerning in pesticide drift rises, so this study attempts to establish a test bench that can repeatedly and continuously evaluate this. To this end, this study first analyze ISO 22866 and ASABE S561.1 among the international standard test methods related to pesticide fugitive evaluation. A test bench was established at the Naju practice field of Chonnam National University in accordance with international standards, and field tests were carried out (ISO 22866, ASABE S561.1) to verify effectiveness. A test bench that established in this study and a pesticide drift recovery protocol by aerial application can improve the experimental environment where field experiments were complex and it was difficult to achieve the same conditions. In addition, it will be possible to construct a database of pesticide drift that takes into account various factors that affect pesticide drift substances, which is expected to improve the reliability of the data, as well as quantitative evaluation of pesticide drift in the air.