潭陽-鎭安사이에 分布하는 葉理狀花崗岩類에 對한 岩石化學的 硏究

Cheong Bin Kim(金正彬),Yong Jun Kim(金勇俊),Sei Sun Hong(洪世善) 대한자원환경지질학회 1990 자원환경지질 Vol.23 No.1

Foliated granites between Damyang and Jinan are subdivided into Daegang foliated granite, Foliated hornblende biotite granodiorite, Sunchang foliated granodiorite, Foliated two mica granite and Samori foliated granite by mineral and texture. From EPMA data of the foliated granites following results are achieved. Composition of plagioclase are correspond to andesine, oligoclase and albite in Foliated hornblende biotite granodiorite, Sunchang foliated granodiorite and other foliated granites, respectively. And amphiboles are calcic hornblende in Foliated hornblende biotite granodiorite, and riebeckite in Daegang foliated granite. In differentiation index(D. I.) and Larsen index(L. I.), Daegang foliated granite, Foliated two mica granite and Samori foliated granite which belong to granite are 83.12-95.54 and 25.86-29.05 and Foliated hornblende biotite granodiorite and Sunchang foliated granodiorite of diorite to granodiorite are 54.99-78.54(D. I.) and 6.48-21.01(L. I.). Harker and AMF diagrams plotted from foliated granites show that the granites are product of calc alkali rock series orignated from co-magma. Characteristic foliation of foliated granites fromed by ductile deformation at deep zone of dextral strike slip fault. Foliated granites are considered as a series of differentiated product of Triassic Igneous activity of Songrim disturbance. According to REE, (La/Lu) and Eu/Sm, Foliated hornblende biotite granodiorite and Sunchang foliated granodiorite are correspond to granodiorite, and other foliated granites are monzo-and syeno-granite. Foliated granites having 0.20-0.01 of Em/Sm ratio are plutons emplaced by the tectonic setting in continents and continental margin.

New age constraints for hominid footprints found on Jeju Island, South Korea

Kim, Cheong Bin,Kim, Jeong Yul,Kim, Kyung Soo,Lim, Hyoun Soo Elsevier 2010 Journal of archaeological science Vol.37 No.12

<P><B>Abstract</B></P><P>In 2004 numerous hominid footprints, along with diverse animal footprints, were found in the Late Quaternary strata of Jeju Island, South Korea. However, the age of the sediments in which the footprints were found is still controversial. Previous age estimates included radiocarbon ages of ca. 15,000 yr BP (Late Pleistocene) and quartz optically stimulated luminescence ages of ca. 7000 yr BP (mid-Holocene). In this study we report on 11 AMS <SUP>14</SUP>C dating results from a new set of samples collected from the footprint-bearing strata and from associated sediments. Despite some variations and age reversal, all samples collected from the footprint-bearing strata yielded <SUP>14</SUP>C ages of late Pleistocene. These ages are comparable with previous radiocarbon dating results. Furthermore, the presence of the proboscidean footprints attributable to woolly mammoths in the footprint-bearing strata supports the radiocarbon dating results. Based on the new radiocarbon dates and the presence of the alleged mammoth footprints, the age of the hominid footprints found at Jeju Island is thought to be late Pleistocene (about 19,000–25,000 cal yr BP). Therefore, this is the second discovery of hominid footprints dated to the Pleistocene age in Asia, and the first to be discovered in Korea.</P>

Effect of the Bottom Slope on the Formation of Coastal Front and Shallow-Sea Structure during Cold-Air Outbreak

Cheong, Hyeong-Bin,Kim, Young-Seup,Hong, Sung-Keun,Cheong, Hyeong-Bin The Korean Society of Oceanography 1997 Journal of the Korean Society of Oceanography Vol.32 No.3

Coastal circulations during the (surface condition of an) idealized cold-air outbreak are numerically investigated with two-dimensional, non-hydrostatic model in which a constant bottom-slope exists. The atmospheric forcing during a cold-air outbreak is incorporated as the surface cooling and the wind stress. When the offshore angle of the wind-stress vector, defined as the angle measured from the alongshore axis, is smaller than 45 degrees, a strong downwelling circulation develops near the coast. A sharp density front, which separates the vertically homogeneous region from the offshore stratified region, is formed near the coast and propagates offshore with time. Onshore side of the density front, small-scale circulation cells which are aligned in the direction perpendicular to the bottom begin to develop as the near-coast homogeneous region broadens. The surface cooling enhances greatly the development of the surface mixed layer by convective motions due to hydrostatic instability. The convective motions reach far below the hydrostatically unstable layer which is attached to the surface. The small-scale circulation cells are appreciably modified by the convetion cell and the density front develops far offshore compared to the case of no surface cooling. As to the effect of the bottom slope, the offshore distance of the density front increases (decreases) as the bottom slope decreases (increases), which results from the fact that the onshore volume-transport (Ekman transport) of the low-density upper seawater remains almost constant when the wind-stress is maintained constant. It is shown that the bottom slope is an essential factor for the formation of both the density front and the alongshore current when the surface cooling is the only forcing.

潭陽―鎭安사이에 分布하는 葉理狀花崗岩類에 對한 地質時代와 成因에 關한 硏究

Cheong Bin Kim(金正彬),Yong Jun Kim(金勇俊) 대한자원환경지질학회 1990 자원환경지질 Vol.23 No.2

Plutons of Damyang-Jinan area consist of gray feldspar granite gneiss, biotite granite gneiss, foliated granites, Namweon granites, gabbro, biotite granite and Ogangri granite in term of mineralogical, texture and field evidence. From Isotope data of study area, chronological order of the Plutons are the Pre-cambrian gray feldspar granite gneiss(Ar39-Ar40, hornblende, 1998.4±8.3Ma), middle to late Triassic Daegang foliated granite(Rb/Sr, whole rock, 228±4Ma), foliated hornblende biotite granodiorite(K/Ar, hornblende, 198.7±9.9.Ma), Sunchang foliated granodiorite(Rb/Sr, whole rock, 222±4Ma), foliated two mica granite, Samori foliated granite and Namweon granite(Rb/Sr, whole rock, 211±3Ma: K/Ar, hornblende, 203±10.2 Ma), middle Jurassic Gabbro(K/Ar, hornblende, 180.7±9MA) and biotite granite, and Cretaceous Ogangri granite. According to variations diagrams of Al₂O₃ versus normative Pl(100 An)/(Ab+An), Daegang foliated granite is plotted on tholeiitic series, and other foliated granites on calc alkaline rock series which are consider to be formed by magmatism at continental margin and island arc region. And alkalinity versus SiO₂ shows that Daegang folited granite and Samori foliated granite are correspond to alkaline region, foliated hornblende biotite granodiorite and Sunchang foliated granodiorite to calc alkaline region, and foliated two mica granite to both regions. According to ACF diagrams, Daegang and Samori foliated granites are plotted on S-type. Foliated hornblende biotite granodiorite and Sunchang foliated granodiorite on I-type, and foliated two mica granite on both type. Foliated granites are a series of differentiated products from cogenetic magma, and effected under ductile sheared zone. Characteristic foliation of foliated granites are considered to be generated by dextral strike slip faulting and ductile shearing.

The Geochemical Characteristics and Geochronology of Foliated Granites in the Sunchang Area, Chonbuk

Kim, Cheong-Bin,Yoon, Chung-Han,Shin, In-Hyun CHOSUN UNIVERSITY 1997 Basic Science and Engineering Vol.1 No.1

Igneous rocks of the Sunchang area are composed of the Precambrian porphyroblastic gneiss and Chailbong granite gneiss, and of the following Mesozoic bodies: Tongbok metaporphyry, Daegang foliated granite (DFGR), Jangsu foliated granodiorite (JFGRD), Sunchang foliated granite (SFGR) and Samori foliated granite (SMFGR). These rocks are distinctly different in terms of their field occurrence, mineralogy and petrochemistry, as well their isotopic ages. The porphyoblastic gneiss and Chaibong granite gneiss are Precambrian and have a U-Pb zircon age 1935±4 Ma to 1923±14 Ma respectively. The Tongbok metaporphyry, the DFGR, the JFGRD, and the SFGR are much younger, having U-Pb zircon ages 219 Ma, 212±8 Ma, 187±3 Ma and 183±8 Ma respectively,which are Late Triassic to Early Jurassic. On the basis of normative Qz-Or-Pl, Or-Ab-An diagrams, L.I. and D.I., and JFGRD plots from quartz monzodiorite to granodiorite region while the others plot in a granodiorite to granite field. On the A-M-F diagram all the foliated granites belong to the calc alkalic rock series. The JFGRD and the SFGR have high Ba, Sr, Li, Co, Zn and low REE and HFs elements. On the other hand, the DFGR has high Zn, Cu, REE, HFS elements and low Ba, Sr, Li and ferromagnesian elements. In terms of the REE characteristics the ∑LREE/ ∑REE is 0.57 for the SFGR and 0.88 to 0.92 for the JFGRD to the SFGR. Chondrite normalized REE trend is for the DFGR, the JFGRD and the SFGR show a decrease in LREE while the HREE pattern is essentially constant. But the SMFGR indicate an increase in HREE. For the JFGRD and the SFGR the ∑REE, [La/Lu]cn and Eu/Eu are 171ppm to 98ppm, 16.0 to 7.7, 0.80 to 0.25, respectively, which classifies it as a continental quatrz diorite to granodiorite. The same parameters for the DFGR and the SMFGR are 350ppm to 26ppm, 8.4 to 1.1, 0.07 to 0.22 with a small to moderate Eu(-) anomaly and thus indicates a monzo- to syenogranite composition. On alkalinity-silica diagram the JFGRD and the SFGR plot in calc-alkaline region while the DFGR and the SMFGR fall in the alkaline field. Based on the silica vs. trace element diagrams, the DFGR plots within the plate granite region while the others could have formed near a volcanic arc or a plate collision environment. The Honam shear zone (HSZ), which separates the Ryeongnam massif from the Ogcheon fold belt to the north, developed at ca. 180 Ma. K-Ar and Ar-Ar ages in the study area are younger than zircon ages and probably apply to metamorphic activity related to the deformation along the HSZ. Ages for Mesozoic plutons in the Ryeongam massif are similar to ages reported in the Qinling-Dabie belt of China and indicate coeval igneous activity and possiblity similar tectonic evolution.

Methods for Derivation of Human Embryonic Stem Cells

Kim, Hee Sun,Oh, Sun Kyung,Park, Yong Bin,Ahn, Hee Jin,Sung, Ki Cheong,Kang, Moon Joo,Lee, Lim Andrew,Suh, Chang Suk,Kim, Seok Hyun,Kim, Dong-Wook,Moon, Shin Yong Wiley (John WileySons) 2005 Stem cells Vol.23 No.9

<P>The expanded blastocysts, developed from 2PN-stage embryos, are generally divided into three categories: a good blastocyst containing a large and distinguishable inner cell mass (ICM), a blastocyst with a small and distinct ICM, and a blastocyst with a poorly defined ICM. In this study, we introduce methods for the derivation of human embryonic stem cells (hESCs) depending on the quality of the blastocysts. An immunosurgical method was used for the good expanded blastocysts. This method, however, raises the probability of ICM loss in cases of hESC derivation from blastocysts with smaller or indistinct ICMs. Furthermore, this method is also associated with a risk of the contamination of the hESCs with animal pathogens. To overcome these shortcomings, the partial- or whole-embryo culture method was used. For blastocysts with no visible ICM, the whole-embryo culture method was used to establish hESCs via the seeding of the entire blastocyst without its zona pellucida directly on a STO feeder layer. However, trophectodermal overgrowth tends to hinder the expansion of the ICM during the initial steps of hESC derivation. Therefore, the partial-embryo culture method was developed to establish hESCs from blastocysts with smaller ICMs. The surgical isolation of the region containing the ICM with an ultra-fine glass pipette alleviates trophectoderm overgrowth. This method is also applicable to blastocysts with large and distinct ICMs, and the efficiency of this method is comparable to that of the immunosurgical method.</P>

Core Elements for Implementing Antimicrobial Stewardship Programs in Korean General Hospitals

Cheong Hae Suk,Park Kyung-Hwa,Kim Hong Bin,김신우,Kim Bongyoung,Moon Chisook,이미숙,Yoon Young Kyung,Jeong Su Jin,Kim Yong Chan,Eun Byung Wook,Lee Hyukmin,Shin Ji-Yeon,Kim Hyung-Sook,Hwang In Sun,Park Choon 대한감염학회 2022 Infection and Chemotherapy Vol.54 No.4

Currently, antimicrobial resistance (AMR) is a major threat to global public health. The antimicrobial stewardship program (ASP) has been proposed as an important approach to overcome this crisis. ASP supports the optimal use of antimicrobials, including appropriate dosing decisions, administration duration, and administration routes. In Korea, efforts are being made to overcome AMR using ASPs as a national policy. The current study aimed to develop core elements of ASP that could be introduced in domestic medical facilities. A Delphi survey was conducted twice to select the core elements through expert consensus. The core elements for implementing the ASP included (1) leadership commitment, (2) operating system, (3) action, (4) tracking, (5) reporting, and (6) education. To ensure these core elements are present at medical facilities, multiple departments must collaborate as teams for ASP operations. Establishing a reimbursement system and a workforce for ASPs are prerequisites for implementing ASPs. To ensure that ASP core elements are actively implemented in medical facilities, it is necessary to provide financial support for ASPs in medical facilities, nurture the healthcare workforce in performing ASPs, apply the core elements to healthcare accreditation, and provide incentives to medical facilities by quality evaluation criteria.

Petrochemical and Geochronological Study on the Igneous Rocks of the Jangsu Area

金正彬(Cheong Bin Kim) 대한지질학회 1990 지질학회지 Vol.26 No.6

The K-Ar age of the volcanic pebbles in Lake Shiwha Formation and its geological implication

김정빈(Cheong-Bin Kim) 대한지질학회 2008 지질학회지 Vol.44 No.4

제올라이트 급여가 돼지고기 등심 품질에 미치는 영향

김정빈(Cheong-Bin Kim),양철주(Chul-Ju Yang),심기훈(Ki-Hoon Shim),정현숙(Hyun-Sook Jung),최옥자(Ok-Ja Choi) 한국식품영양과학회 2013 한국식품영양과학회지 Vol.42 No.12

The effect of zeolite on the quality properties of fresh and broiled pork loin was investigated using 84 pigs that were fed with different feed ration of zeolite (0, 0.5, 1.0 and 2.0% zeolite) for 3 months. The pH of fresh pork loin fed with 0% and 2.0% zeolite was 5.95, which was higher than those of others (P<0.05). The cooking loss of fresh pork loin fed with 0.5% and 1.0% zeolite were 26.24% and 26.42%, respectively, which was higher than those of others (P<0.05). The dissolution crude lipid of 1.0% zeolite (3.11%) was highest, but that of 0% zeolite was lowest (P<0.05). L and a values were highest in fresh pork fed with 1.0% zeolite, however, b value was highest in fresh pork fed with 2.0% zeolite (P<0.05). In the results of L value of the broiled pork loin, the feed ration with 0% zeolite was highest (75.49) and decreased as the feed ration of zeolite increased (P<0.05). The a and b values were highest in broiled pork fed with 0.5% zeolite (P<0.05). The hardness, springiness, gumminess and chewiness of fresh and broiled pork loin fed with 2.0% zeolite were highest and increased as the feed ration of zeolite increased (P<0.05). In the result of sensory evaluation in broiled pork loin, color preference was increased as the feed ration of zeolite increased (P<0.05). Taste preference was highest in the 1.0% zeolite (10.70), followed by 2.0% (8.72), 0.5% (7.64), and 0% zeolite (6.44) (P<0.05). Flavor and appearance preferences were not significantly different between the groups. Texture preference was decreased as the feed ration of zeolite increased. The overall preference was highest in the 1.0% with zeolite (10.80), followed by 0.5% (10.04), 0% (8.41), and 2.0% (7.92) with zeolite (P<0.05). In conclusion, the optimal feed ration of zeolite for broiled pork loin was between 0.5 and 1.0% zeolite.