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New feasible quarantine disinfestation using ethyl formate for termites and ants on imported lumber
Kim Dong bin,Kim Kyung won,박민구,Roh Gwang Hyun,Cha Dong H.,Lee Byung ho 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.4
The interception of exotic ants and termites from stone and lumber imported into Korea is on the rise, including Solenopsis invicta. Currently, a relatively long exposure (24 h) of methyl bromide (MB) fumigation is the only practical disinfestation option for exotic ants and termites on imported stone and lumber. In this study, ethyl formate (EF) wase evaluated as a potential MB alternative to disinfest ants and termites in imported lumber, with a focus on S. invicta. As S. invicta is not established in Korea, we first determined whether Reticulitermes speratus, established in Korea, could be considered as an EF surrogate of S. invicta. From 1 h EF fumigation trials, workers of S. invicta were more sensitive to EF than those of R. speratus based on lethal concentration × time causing 99% mortality (LCt 99% ), supporting that R. speratus can be used as an EF surrogate of S. invicta. When R. speratus workers were further fumigated with EF for 4 h at four different temperatures, LCt 99% values for R. speratus workers were 108.00, 63.31, 77.24, and 67.24 g h/m 3 at 2, 5, 13, and 23 ◦ C, respectively. From scale-up (0.65 m 3 ) and commercial scale (76.4 m 3 ) trials containing two infestation-prone lumber species, lauan (Shorea spp.) and acacia (Acacia spp.), 140 g/m 3 EF at >5 ◦ C for 4 h resulted in the complete control of R. speratus workers, suggesting that 140 g/m 3 4 h-EF-fumigation may be applicable as a potential MB-alternative treatment for disinfestation of invasive S. invicta on imported lumber.
한국에서 지역에 따른 Helicobacter pylori 균주 내성
김재연 ( Jae Yeon Kim ),김나영 ( Na Young Kim ),김성중 ( Sung Jung Kim ),백광호 ( Gwang Ho Baik ),김광하 ( Gwang Ha Kim ),김정목 ( Jung Mogg Kim ),남령희 ( Ryoung Hee Nam ),김홍빈 ( Hong Bin Kim ),이동호 ( Dong Ho Lee ),정현채 ( H 대한소화기학회 2011 대한소화기학회지 Vol.57 No.4
Background/Aims: This study was performed to compare the prevalence rates of primary antibiotic resistance in Helicobacter pylori (H. pylori) isolates among different regions of Korea. Methods: H. pylori were isolated from gastric mucosal biopsy specimens of 99 Koreans who lived in Gyeonggi (n=40), Kangwon province (n=40) and Busan (n=19) from April to August in 2008. All the patients had no history of H. pylori eradication therapy. The susceptibilities of the H. pylori isolates to amoxicillin, clarithromycin, metronidazole, tetracycline, azithromycin, ciprofloxacin, levofloxacin, and moxifloxacin were tested according to the agar dilution method. Results: There was a difference in resistance to clarithromycin in three institutes located among Gyeonggi (32.5%), Kangwon province (12.5%) and Busan (42.1%) by One way ANOVA test (p=0.027) and nonparametric Kruskal Wallis test (p=0.027). However, by post-hoc analysis, there was no statistically significant difference among three regions. Similarly, the other 7 antibiotics (amoxicillin, metronidazole, tetracycline, azithromycin, ciprofloxacin, levofloxacin and moxifloxacin) did not show any significant difference. Conclusions: There was no significant regional difference of the primary antibiotic resistance of H. pylori. However, the included patient number might not be enough for this conclusion demanding further evaluations. (Korean J Gastroenterol 2011;57:221-229)
Gwang H. Lee,Bumsuk Lee,Bo-Yeon Yi,Keumsuk Lee,Myong-ho Park,Han-Joon Kim,Hai-Soo Yoo 한국지질과학협의회 2012 Geosciences Journal Vol.16 No.3
We analyzed 2-D seismic and well-log data from the southern Jeju Basin, offshore southern Korea, northern East China Sea to estimate the CO2 storage capacity of the structural traps in the area. Sand intervals with >10-m gross thickness were identified from the gamma-ray logs and their porosity was estimated from the neutron logs corrected for the shale effect. A total of 14 structural closures was delineated from the depth-converted maps of the sand intervals. Seismic inversion and multi-attribute transform were performed to predict the reservoir quality (i.e., porosity) of the closures away from the well control. The total storage capacity of the closures was estimated from the deterministic, volumetric method, based on the published storage efficiency parameters. The estimated CO2 storage capacity for the 14 closures is about 302 Mt, comparable to the CO2 emission (ca. 530 Mt) of Korea in 2009
Lee, Gwang H.,Kim, Dae C.,Park, Mi K.,Park, Soo C.,Kim, Han J.,Jou, Hyeong T.,Khim, Boo K. Blackwell Publishing Asia 2010 The island arc Vol.19 No.1
<P>Abstract</P><P>The Korea Strait shelf mud (KSSM) (Nakdong River subaqueous delta) is the most conspicuous Holocene sedimentary feature in the inner shelf off southeast Korea. Analysis of multi-channel sparker profiles and <SUP>14</SUP>C ages of sediment cores reveals that the KSSM consists of three seismic units at the depocenter (>60 m thick): (i) the thin transgressive bottom (><I>ca</I> 8000 cal <SMALL>BP</SMALL>); (ii) thick (>40 m) obliquely progradational middle (<I>ca</I> 8000–<I>ca</I> 2600 cal <SMALL>BP</SMALL>); and (iii) thin transgressive top (<I>ca</I> 2600 cal <SMALL>BP</SMALL>–present) units. The relative base level, predicted from the internal reflection pattern of the KSSM, remained significantly deeper (up to >70 m) than global sealevel during much of the Holocene. The apparent gradual drop (∼20 m) of the relative base level during the deposition of the middle unit, followed by a rise, further suggests that base level does not conform to sealevel and is more sensitive than the relative sealevel is to the local oceanographic regime and processes.</P>
Lee, Gwang H.,Lee, Bumsuk,Kim, Han-Joon,Lee, Keumsuk,Park, Myong-ho Elsevier 2014 INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL Vol.23 No.-
<P>We estimated the storage capacity for geological CO2 sequestration of the Jeju Basin off southern Korea, northern East China Sea using the storage efficiency and a deterministic, volumetric method. We analyzed seismic and well-log data to get the geological parameters and used the storage efficiency parameters for deep saline, nonmarine sediments in open systems. The time interval of the basin fill from 1.2 to 2.8 s two-way traveltime was selected for the depth zone for CO2 storage. This interval corresponds to the depth range of about 1200 m to about 3900 m and occurs mostly below the Late-Miocene unconformity which largely separates the thin nonmarine to shallow-marine sediments above and the thicker nonmarine sediments below. The time interval was divided into eight layers of equal time thickness of 0.2 s two-way traveltime to determine the representative porosity and the in situ pressure, temperature, and density of CO2 for different depth ranges. The estimated geological CO2 storage capacities for the rock volume in the eight-layer interval range from about 23.5 X 10(12) kg (23.5 Gt) to about 687.0 X 10(12) kg (687 Gt) with an average of about 196.0 x 10(12) kg (196.0 Gt). (C) 2014 Elsevier Ltd. All rights reserved.</P>