http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jong Hyup Park(Jong Hyup Park),Min Geun Song(Min Geun Song),Sang Woo Lee(Sang Woo Lee),Sung Hwan Choi(Sung Hwan Choi),Jeum Kyu Hong(Jeum Kyu Hong) 한국식물병리학회 2022 Plant Pathology Journal Vol.38 No.6
Vapours from origanum oil (O) and thyme oil (T) were applied to the four soil-borne strawberry pathogens Fusarium oxysporum f. sp. fragariae, Colletotrichum fructicola, Lasiodiplodia theobromae, and Phytophthora cactorum, causing Fusarium wilt, anthracnose, dieback, and Phytophthora rot, respectively. Increasing T vapour doses in the presence of O vapour strongly inhibited mycelial growths of the four pathogens and vice versa. When mycelia of F. oxysporum f. sp. fragariae and P. cactorum exposed to the combined O + T vapours were transferred to the fresh media, mycelial growth was restored, indicating fungistasis by vapours. However, the mycelial growth of C. fructicola and L. theobromae exposed to the combined O + T vapours have been slightly retarded in the fresh media. Prolonged exposure of strawberry pathogens to O + T vapours in soil environments may be suggested as an alternative method for eco-friendly disease management.
Choi, Jae-Woo,Choi, Yong-Soo,Hong, Seok-Won,Kim, Dong-Ju,Lee, Sang-Hyup Wiley (John WileySons) 2012 Water environment research Vol.84 No.7
<P>This study investigated the effect of pH and the presence of coexisting (competitive) anions on the removal of phosphate by titanium mesostructures synthesized using do- or hexadecyltrimethylammonium bromide. To address these research objectives, experiments were conducted (1) under controlled initial pH values (2 to 10); and (2) through injection of nitrate, fluoride, chloride, or sulfate anions into a phosphate solution. Based on the experimental results, an initial of pH of 2 was found to be optimal for use of titanium mesostructures. The presence of fluoride anions in solution significantly decreased the removal efficiency of phosphate removal (3.56% at 3.95 mg/g). However, the addition of nitrate, chloride, and sulfate anions did not affect phosphate removal.</P>
Choi, Yo Han,Ra, Eun Cheol,Kim, Eun Hyup,Kim, Kwang Young,Jang, Youn Jeong,Kang, Kyeong-Nam,Choi, Sun Hee,Jang, Ji-Hyun,Lee, Jae Sung Wiley (John WileySons) 2017 CHEM SUS CHEM Vol.10 No.23
<P>A microwave-assisted hydrothermal synthesis produces ZnFe2O4 containing Na residue as a precursor to a CO2 hydrogenation catalyst that displays high CO2 conversion and high selectivity to liquid hydrocarbon products in the gasoline and diesel range with high olefin-to-paraffin ratios. Compared to reference catalysts derived from Fe2O3 and a ZnO-Fe2O3 physical mixture, the ZnFe2O4-derived catalyst contains well-dispersed iron particles with Zn serving as a structural promoter. A profound effect of the residual Na as an electronic promoter is also observed, which improves the selectivity for C5+ hydrocarbons and olefins. The ZnFe2O4-derived catalyst exhibits excellent performance in the CO2 Fischer-Tropsch reaction as it forms the active Hagg iron carbide (-Fe5C2) phase readily through the insitu carburization of iron.</P>
Choi, Seungmok,Shin, Seung-Hyup,Lee, Jeongwoo,Min, Kyoungdoug,Choi, Hoimyung Professional Engineering Publishing Ltd 2015 Proceedings of the Institution of Mechanical Engin Vol. No.
<P>This paper presents how injector nozzle distributions and the combustion chamber geometry affect the emission characteristics of diesel engines. The number of nozzle holes was increased from seven to 12 by a using double-row nozzle distribution to enhance the air–fuel mixing and the spatial distribution of the spray while avoiding spray overlap. The combustion chamber geometry was modified to have a wide shallow two-step bowl, which ensured adequate spray penetration with the double-row nozzle, to observe the influence of the spray–piston interaction on the combustion and emissions. Three hardware combinations (a seven-hole single-row nozzle with a conventional piston, a 12-hole double-row nozzle with a conventional piston, and a two-step piston) were tested in a single-cylinder direct-injection diesel engine under three boost and exhaust gas recirculation conditions. The injection timing was adjusted to result in a similar power by maintaining 50% of the total fuel mass fraction burned points for each hardware combination. For a conventional boost pressure (1.10 bar) and 30% exhaust gas recirculation, the 12-hole double-row nozzle with a conventional piston exhibited the best emission characteristics with a significant reduction in the particulate matter emissions. For a high boost pressure (1.30 bar) and 30% conventional exhaust gas recirculation, the nitrogen oxide emissions slightly increased and the particulate matter emissions decreased for the 12-hole double-row nozzle with a conventional piston compared with those for the seven-hole single-row nozzle. The two-step piston resulted in decreased particulate matter emissions but increased nitrogen oxide emissions under a high boost pressure. For 60% high exhaust gas recirculation, which is characterized by low-temperature combustion, the particulate matter emissions, the carbon monoxide emissions, and the total hydrocarbon emissions decreased simultaneously without an increase in the nitrogen oxide emissions using the 12-hole double-row nozzle with a two-step piston.</P>
Choi, Hyuk Jin,Kim, Hwan Soo,Nam, Kyoung Hyup,Cho, Won Ho,Choi, Byung Kwan,Han, In Ho The Korean Neurosurgical Society 2015 Journal of Korean neurosurgical society Vol.57 No.3
Objective : For improving the drawbacks of previous thoracolumbar spine trauma classification, the Spine Trauma Study Group was developed new classification, Thoracolumbar Injury Classification and Severity Score (TLICS). The simplicity of this scoring system makes it useful clinical application. However, considering criteria of Korean Health Insurance Review and Assessment Service (HIRA), the usefulness of TLICS system is still controversial in the treatment decision of thoracolumbar spine injury. Methods : Total 100 patients, who admitted to our hospital due to acute traumatic thoracolumbar injury, were enrolled. In 45, surgical treatment was performed and surgical treatment was decided following the criteria of HIRA in all patients. With assessing of TLICS score and Denis's classification, the treatment guidelines of TLICS and Denis's classification were applied to the criteria of Korean HIRA. Results : According to the Denis's three-column spine system, numbers of patients with 2 or 3 column injuries were 94. Only 45 of 94 patients (47.9%) with middle column injury fulfilled the criteria of HIRA. According to TLICS system, operation required fractures (score>4) were 31 and all patients except one fulfilled the criteria of HIRA. Conservative treatment required fractures (score<4) were 52 and borderline fracture (score=4) were 17. Conclusion : The TLICS system is very useful system for decision of surgical indication in acute traumatic thoracolumbar injury. However, the decision of treatment in TLICS score 4 should be carefully considered. Furthermore, definite criteria of posterior ligamentous complex (PLC) injury may be necessary because the differentiation of PLC injury between TLICS score 2 and 3 is very difficult.
Choi, Brian Hyun,Jung, Kyung-Won,Choi, Jae-Woo,Lee, Sang-Hyup,Lee, Young Jae,Ahn, Kyu-Hong ELSEVIER 2017 Journal of Cleaner Production Vol. No.
<P><B>Abstract</B></P> <P>This study presents a direct and simple one-pot synthesis of 2-methylimidazole grafted poly-vinylbenzyl chloride (<SUP>2-Me</SUP>Im-pVBC) using radical polymerization, followed by its studies on the removal of structurally diverse mono and di-azo dyes (Acid Orange 7 (AO7), Acid Yellow 17 (AY17), and Acid Black 1 (AB1)) from aqueous media. Characterization of the material, effect of key factors such as dosage and pH on substrate removal, adsorption kinetics and isotherms, removal selectivity of the examined dyes, and reusability of the adsorbent were assessed. The prepared polymeric material exhibited outstanding removal activity with respect to all three dyes at a wide range of pH, with no significant impact due to the chemical complexity of the substrate. Adsorption kinetics and isotherm studies showcases supreme and rapid affinity towards AO7, with a maximum adsorption capacity of around 2012 mg/g. Lastly, <SUP>2-Me</SUP>Im-pVBC exhibited its sustainability by maintaining 8 cycles of adsorption-desorption process with outstanding substrate removal rate. Therefore, <SUP>2-Me</SUP>Im-pVBC demonstrated promising adsorption performance and exceptional selectivity on all three examined substrates, which can be further developed as an efficient agent for removing synthetic dyes in aqueous system.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Facile one-pot synthesis of imidazole-grafted polymer was performed. </LI> <LI> <SUP>2-Me</SUP>Im-pVBC exhibits superb removal of azo dyes from aqueous media. </LI> <LI> Adsorption capacities of the dyes depends on the electronic states of the dyes. </LI> <LI> <SUP>2-Me</SUP>Im-pVBC delineates high selectivity to azo dyes with high adsorption capacity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>