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Joo‑Youl Huh,Min‑Je Hwang,Seung‑Woo Shim,Tae‑Chul Kim,Jong‑Sang Kim 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6
The reactive wetting behaviors of molten Zn–Al–Mg alloys on MnO- and amorphous (a-) SiO2-covered steel sheets wereinvestigated by the sessile drop method, as a function of the Al and Mg contents in the alloys. The sessile drop tests werecarried out at 460 °C and the variation in the contact angles (θc) of alloys containing 0.2–2.5 wt% Al and 0–3.0 wt% Mg wasmonitored for 20 s. For all the alloys, the MnO-covered steel substrate exhibited reactive wetting whereas the a-SiO2-coveredsteel exhibited nonreactive, nonwetting (θc > 90°) behavior. The MnO layer was rapidly removed by Al and Mg contained inthe alloys. The wetting of the MnO-covered steel sheet significantly improved upon increasing the Mg content but decreasedupon increasing the Al content, indicating that the surface tension of the alloy droplet is the main factor controlling its wettability. Although the reactions of Al and Mg in molten alloys with the a-SiO2 layer were found to be sluggish, the wettabilityof Zn–Al–Mg alloys on the a-SiO2 layer improved upon increasing the Al and Mg contents. These results suggest that thewetting of advanced high-strength steel sheets, the surface oxide layer of which consists of a mixture of MnO and SiO2,withZn–Al–Mg alloys could be most effectively improved by increasing the Mg content of the alloys.
김주필(Joo Pil Kim),최한석(Han Seak Choi),예용택(Yong Taek Ye),예성훈(Seong Hun Ye),김태우(Tae Woo Kim),김대희(Dae Hee Kim),지승환(Seung Hwan Ji),지성현(Sung Hyun Ji),이형민(Hyung Min Lee),변진관(Jin Kwan Byun),조주완(Joo Whan Jo),박솔 한국거미연구소 2017 한국거미 Vol.33 No.2
한국거미연구회 회원들은 2017년 8월 3일부터 4일까지 경기도 안산시 소재 시화호 갈대습지공원을 김주필, 최한석, 예용택, 예성훈, 김태우, 김대희, 지승환, 지성현, 변진관, 이형민, 조주완, 박솔민, 이형진, 이태후, 이승후, 조윤규, 조원규, 이준이, 신정애, 이영경, 최라미, 이윤정, 이용호, 한주연, 윤혜원, 김형주 등 26명이 주야로 채집한 결과 18과 49속 71종을 발표 보고하는 바이다. From August 3 to 4 in 2017. Koran Arachnological Study members investigated the Spiders in the whole area Gyeonggi-do Ansan-si, and reported 18 Families, 49 Genus 71 Species of spiders. The collected spiders are placed (stored) in the Joo-Pil Spider museum.
김주필(Joo Pil Kim),최한석(Han Seak Choi),예용택(Yong Taek Ye),예성훈(Seong Hun Ye),김태우(Tae Woo Kim),김대희(Dae Hee Kim),지승환(Seung Hwan Ji),지성현(Sung Hyun Ji),이형민(Hyung Min Lee),변진관(Jin Kwan Byun),조주완(Joo Whan Jo),박솔 한국거미연구소 2017 한국거미 Vol.33 No.2
한국거미연구회 회원들은 2017 년 8월 2일부터 3일까지 인천광역시 남동구 소재 소래습지생태공원을 김주필, 최한석, 예용택, 예성훈, 김태우, 김대희, 지승환, 지성현, 변진관, 이형민, 조주완, 박솔민, 이형진, 이태후, 이승후, 조윤규, 조원규, 이준이, 신정애, 이영경, 최라미, 이윤정, 이용화, 한주연, 윤혜원, 김형주 등 26명이 주야로 채집한 결과 14과 38속 50종을 발표 보고하는 바이다. From August 2 to 3 in 2017. Koran Arachnological Study members investigated the Spiders in the whole area Incheon Namdong-gu, and reported 14 Families, 38 Genus 50 Species of spiders. The collected spiders are placed (stored) in the Joo-Pil Spider museum.
Chun, Yoon-Keun,Ha, Joo-hun,Hong-Jung-Woo,Oh, Soo-Myung,Kim, Sung-Soo 경희대학교 동서의학연구소 1999 INTERNATIONAL SYMPOSIUM ON EAST-WEST MEDICINE Vol.1999 No.1
Yoon-Keun Chun¹,Joohun Ha□Hong-Jung Woo□, Soo Myung Oh□,Sung Soo Kim□ ¹Department of Molecular Biology, College of Medicine,²Department of Surgery, college of Medicine,³Department of Internal Medicine, College of Oriental Medicine,and ⁴East-Weat Medical Reserch Institute,Kyung Hee University, Seoul, Korea. The HBV DNA Amounts in Serum Have No relationship with ALT level and Hetergeneous Population Coexits in Chronic Hepatitis B Virus Infection. Proceedings of International Symposium on East-West Medicine, Seoul. 212-230, 1999. -Hepatitis B is caused by hepadnavirus. Hepatitis B virus replicates through 3.5kb pregenomic RNA intermediate which is regulated by core promoter. Pathogenesis of hepatitis B virus has been bilieved the result of host immune response. But recently many studies have reported that high level of viral replication caused by mutation in core promoter might result in severs hepatitis. But these studies were performed in vitro, not in vivo. So there is yet debate about which factor, viral of host factor, is more important in pathogenesis of hepatitis B virus. So we measured real viral replication level in 204 chronic hepatitis B patients by quantifying HBV DNA from sera by our novel PCR-based more sensitive method, and compared these results with ALT level measured from same sera, which indicates liver cell damage. Surprisingly there are no significant correlation between HBV DNA quantity and ALT level. Then we cloned core promoter region. In SSCP, we found that many viral mutants coexist in one patient. Base on SSCP result, we chose main viral core promoter type in each patients, which is thought to determine overall viral replication level in this patient. Main type of core promoter region of each 41 patients were directly sequenced. And with these we measured promoter activity by luciferase assay system and compared promoter activity with on another. We found tha there were some differences in promoter activity according to core promoter sequences. And we constructed replication-competent viral constructs with core promoter from 41 patients and Transfected these into HepG2 cell and measured HBV DNA by southern blot. There were also differences in HBV DNA quantity according to core promoter sequences. On these all results we investigated correlation between the effect of HBV core promoter on viral replication in vitro and HBN DNA quantity, ALT level from sera of each patients. We found there is no significant correlation among them. As a result, we concluded that in determining severity chronic hepatitis B patients, host factors of each patient is more important rather than replicative activity of virus itself.
Woo, Sang Myung,Joo, Jungnam,Kim, So Young,Park, Sang-Jae,Han, Sung-Sik,Kim, Tae Hyun,Koh, Young Hwan,Chung, Seung Hyun,Kim, Yun-Hee,Moon, Hae,Hong, Eun Kyung,Lee, Woo Jin Elsevier 2016 PANCREATOLOGY Vol.16 No.6
<P><B>Abstract</B></P> <P><B>Background</B></P> <P>Weight loss in pancreatic cancer is associated with maldigestion due to pancreatic duct obstruction. Pancreatic exocrine replacement therapy (PERT) may significantly improve fat and protein absorption.</P> <P><B>Objectives</B></P> <P>This prospective, double-blind, randomized, placebo-controlled phase II trial assessed whether PERT could reduce or prevent weight loss in patients with unresectable pancreatic cancer.</P> <P><B>Methods</B></P> <P>Sixty seven patients with unresectable pancreatic cancer were randomized to receive enteric coated PERT, consisting of 6–9 capsules of pancreatin (457.7 mg/capsule), or placebo. Patients took two capsules each three times daily during main meals and one capsule each up to three times daily when having between-meal snacks. The primary endpoint was the percentage change in body weight at eight weeks.</P> <P><B>Results</B></P> <P>The mean percentage change in body weight (1.49% [1.12 kg] vs. 2.99% [1.63 kg], <I>P</I> = 0.381) and the mean percent change in Patient-Generated Subjective Global Assessment (PG-SGA) score (8.85% vs. 15.69%, <I>p</I> = 0.18) did not differ significantly between the PERT and placebo groups. There was no improvement in quality of life and overall survival did not differ significantly between the PERT and placebo groups (5.84 months vs 8.13 months, <I>p</I> = 0.744).</P> <P><B>Conclusions</B></P> <P>PERT did not reduce weight loss in patients with unresectable pancreatic cancer. Larger randomized trials are needed to identify those patients who may benefit from PERT.</P> <P> <B>Trial registration</B>: ClinicalTrials.gov Number NCT01587534.</P>
4.2 PW, 20 fs Ti:sapphire laser at 0.1 Hz
Sung, Jae Hee,Lee, Hwang Woon,Yoo, Je Yoon,Yoon, Jin Woo,Lee, Chang Won,Yang, Jeong Moon,Son, Yeon Joo,Jang, Yong Ha,Lee, Seong Ku,Nam, Chang Hee OPTICAL SOCIETY OF AMERICA 2017 Optics letters Vol.42 No.11
<P>We demonstrated the generation of 4.2 PW laser pulses at 0.1 Hz from a chirped-pulse amplification Ti:sapphire laser. The cross-polarized wave generation and the optical parametric chirped-pulse amplification stages were installed for the prevention of the gain narrowing and for the compensation of the spectral narrowing in the amplifiers, obtaining the spectral width of amplified laser pulses of 84 nm (FWHM), and enhancing the temporal contrast. The amplified laser pulses of 112 J after the final booster amplifier were compressed to the pulses with 83 J at 19.4 fs with a shot-to-shot energy stability of 1.5% (RMS). This 4.2 PW laser will be a workhorse for exploring high field science. (C) 2017 Optical Society of America</P>