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Evaluation of Correction Parameter for the Free-fall Grab Based Mn Nodule Abundance in the Southern Sector of the KODOS (KODOS 남쪽광구에서 자유낙하식 채취기로 채취된 망간단괴 부존률 평가를 위한 보정상수 검증)

  • Lee, Hyun-Bok;Ko, Young-Tak;Kim, Jong-Uk;Chi, Sang-Bum;Kim, Won-Nyon
    • Economic and Environmental Geology
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    • v.44 no.6
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    • pp.475-483
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    • 2011

  • Quantitative estimate of manganese nodules based on the operation of a free fall grab (FFG) needs to be corrected because of its less retrieval ability. Previously, the correction parameter of the nodule abundance collected by FFG was calculated based on the image analysis of the photos of bottom sediment in the northern sector of the nodule exploration area of Korea in the NE equatorial Pacific. However, nodules in the southern sector are commonly covered by sediment, which may prevent the use of the correction parameter estimated by photographic techniques. In this study, we attempted dual nodule sampling at the same location by different equipments (i.e. box corer (BC) and FFG) to examine the previous correction parameter of nodule abundance for FFG operation. During the exploration cruises in 2007 to 2009, Mn-nodules were collected from 40 stations both by BC and FFG in the southern sector. The correlation analysis between BC and FFG operations revealed that the BC collected nodules 1.43 times larger than FFG. Our result suggests that the correction parameter of 1.43 can be applied for collection of FFG data to estimate Mn-nodule distribution in the southern sector. The obtained parameter is similar to the previous parameter (1.42~1.45) calculated by the image analysis method, indicating an usefulness of new correction parameter suggested by this study.

  • https://doi.org/10.9719/EEG.2011.44.6.475 인용 PDF KSCI

Saponins Isolated from the Leguminosae Plants

  • Kang, Sam-Sik
    • Proceedings of the PSK Conference
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    • 2002.10a
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    • pp.134-135
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    • 2002

  • Legumes are important agricultural and commercial crops characterized by root nodules formed as a result of the symbiotic relationship with nitrogen-fixing rhizobia. Due to the economic significance the chemistry of some of these species has been well recognized. Soybeans and processed soy products, which contain isoflavonoids and saponins, are of wide interest for their multifacted biological effects. (omitted)

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