http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
송효경,신유주 가톨릭대학교 자연과학연구소 2003 자연과학논문집 Vol.24 No.-
새로운 비양론적 페로브스카이트(perovskite) 전이금속 산화물 Li_(0.33)Sr_(0.34+x)Sc_(x)Nb_(1-x)O₃, Li_(0.33)Sr_(0.34+x-y)Sc_(x)La_(y)Ta_(1-x)O₃을 고체 합성법으로 고온합성 하였다. 이들은 모두 정방형 구조를 갖고 있으며, 조성에 따라 단위세포와 A-자리 공극의 농도 및 공유결합성의 변화를 보여준다. 이들의 이온전도도는 300-770K 영역에서 AC-impedence 측정법으로 측정되었다. 이들이 상온 전도도는 10^(-5)Scm^(-1)정도를 나타내었고, 온도가 증가하면서 10^(-2)Scm^(-1)정도까지 증가하였다. 이러한 전도도의 변화는 화학결합 특성, 공극율 및 단위세포의 크기와 연관지어 이해할 수 있었다. New non-stoichiomtric perovskite oxides Li_(0.33)Sr_(0.34+x)Sc_(x)Nb(1-x)O₃ and Li_(0.33)Sr_(0.34+x-y)Sc_(x)La_(y)-Ta(1-x)O₃ were directly prepared by solid-state thermal reaction. As prepared samples show the simple cubic structure and a small variation of lattice parameter, the vacancy concentraticn and bond character with the composition. The ionic conductivity were determined around 10^(-5) Scm^(-1) near room temperature but increased up to 10^(-2) Scm^(-1) with temperature. The conductivity behavior has been discussed in relation with the variation of chemical bonding, the vacancy concentration and the effective volume of unit-cell of the lattice.
백병준,유명상,신재민,김효진,박훈,김장묵,오천환 순천향의학연구소 2003 Journal of Soonchunhyang Medical Science Vol.9 No.2
Background and Objectives : Paranasal sinus cancer is rare when compared with cancers of other sites. Because paranasal sinus is anatomically located adjacent to the orbit and skull base, it is difficult to remove the tumor completely with tumor free margin in advanced paranasal sinus cancer. This report was conducted to investigate clinical characteristics, histologic type and treatment outcome of paranasal sinus cancer. Material and Methods : Twenty-six cases with paranasal sinus cancer diagnosed at the Department of otolaryngology-Head and Neck Surgery, Soonchunhyang Cheonan Hospital from January 1991 to September 2000 were studied by chart review, telephone interview and letters retrospectively. Results : The male to female ratio was 4.2 : 1. Most patients were 6th and 7th decade. The maxillary sinus was the most commonly affected site(61.5%), followed by the ethmoid sinus(34.6%). The most common histologic type of malignancy was squamous cell carcinoma(57.6%), followed by adenocarcinoma(19.2%). Most patients presented with T_(3)/T_(4) or locally advanced disease, N_(0)(91.3%), and M_(0)(100%) Sixtynine pertcent of this study group underwent sugery as part of a mutimodality curative treatment plan or alone as curative treatment. Eighteen patients(69.2%) developed recurrent disease at a median time of 278 days after initial treatment. Kaplan-Meier analysis revealed the 5-year disease specific survival was 34.6%. Conclusion : Most patients with paranasal sinus cancer presented with locally advanced disease. Adanced T stage was highly predictive of poor prognosis. Recurrence rate was high and mostly occured within the second year after treatment.
감초 및 동충하초의 단순포진바이러스 (HSV)에 대한 항바이러스 효과
Yu Su Shin,Chan Hum Park,Ji Hye Yoon,Sang won Lee,Hyo Sun Cho,Hyo Jung Kang 한국약용작물학회 2017 한국약용작물학술대회 발표집 Vol.2017 No.05
Background : Cordyceps militaris is a non-toxic, medicinal mushroom, which is known to possess anti-inflammatory and immunomodulating activities. And also, Glycyrrhiza uralensis is widely used as a crude drug in oriental medicine. However, the effects and mechanism of action of C. militaris and G. uralensis on Herpes simplex virsu (HSV), which is a serious skin disease. This study aimed to evaluate the effect of C. militaris and G. uralensis on Herpes simplex virus. Methods and Results : The results showed that the extracts and major compounds C. militaris and G. uralensis increased the TNF-α product on RAW 264.7. And also, these extracts and major compounds inhibited TNF-α product in RAW 264.7 induced by LPS. Querceitn, which was identified from G. uralensis, was showed Anti-virrus effect of Herpes simplex virus (HSV). Conclusion : Taken together, these results indicate that the anti-stomach cancer effect of C. militaris and G. uralensis in xenograft model implantated Epstein-Barr virus positive-stomach cancer cell line.
Two - Step Ammoniation of By - Product Fluosilicic Acid to Produce High Quality Amorphous Silica
Yu, Hyo Shin,Rhee, Kang In,Lee, Churl Kyoung,Yang, Dong Hyo 한국화학공학회 2000 Korean Journal of Chemical Engineering Vol.17 No.4
A two-step ammoniation was applied to neutralize the fluosilicic acid generated in the production of superphosphate fertilizer, and to recover high-quality amorphous silica in the second step. A fluosilicic acid solution at 12.6% or 25.3 wt% H₂SiF_6 was reacted with aqueous ammonia, precipitating silica and subsequently leaving NH₄F behind in the filtrate. Based on a fixed total of 7.2 moles of ammonia per mole of H₂SiF_6 (120% stoichiometry), ammonia at a molar ratio of ammonia to H₂SiF_6 of 2 to 6 was charged in the first step and the balance of 5.2-1.2 in the second step in four combination sets of ammonia addition. At a combination of 3 and 4.2 molar ratios in the respective first and second steps, amorphous silica of 99.7% purity was readily produced in the second step while a majority of the impurities were precipitated in the first step. The two-step ammoniation was near completion despite a non-equilibrium reaction. However, rapid ammoniation favored the crystallization of ammonium fluosilicate. A sharp pH change occurred between 1.5 and 2.5 NH₃/H₂SiF_6 molar ratios, indicating the rapid disappearance of SiF^(2-)_6 ion from the solution.
국내산 황산니켈로부터 수소환원법에 의한 고순도 Ni 분말의 제조
유효신,이강인,이재천 대한금속재료학회(대한금속학회) 1992 대한금속·재료학회지 Vol.30 No.1
High pure nickel powder was produced from nickel sulfate which was the by-produced in a domestic copper smelter by hydrogen reduction. The purification of nickel sulfate solution was carried out to remove impurites such as Zn, Pb, Fe, Cu and Co by solvent extraction using D2EHPA as an extractant. The purified nickel sulfate solution was reduced in a autoclave by hydrogen pressure and the effects of various additives such as (NH₄)₂CO₃, Tamol 731, and anthraquinone on the hydrogen reduction and the particle size, morphology, and purity of the nickel powder were investigated. Shpheroidal nickel powder of 99.9% purity was obtained through a series of purification, nucleation with anthraquinone, 10 densifications, and heat treatment in flowing hydrogen.
Shin, Jae-Young,Ku, Boncho,Kim, Jaeuk U.,Lee, Yu Jung,Kang, Jae Hui,Heo, Hyun,Choi, Hyo-Joon,Lee, Jun-Hwan Hindawi Publishing Corporation 2015 Evidence-based Complementary and Alternative Medic Vol.2015 No.-
<P><I>Purpose</I>. This trial was performed to investigate the efficacy of laser acupuncture for the alleviation of lower back pain. <I> Methods</I>. This was a randomized, placebo-controlled, double-blind trial. Fifty-six participants were randomly assigned to either the laser acupuncture group (<I>n</I> = 28) or the sham laser acupuncture group (<I>n</I> = 28). Participants in both groups received three treatment sessions over the course of one week. Thirteen acupuncture points were selected. The visual analogue scale for pain, pressure pain threshold, Patient Global Impression of Change, and Euro-Quality-of-Life Five Dimensions questionnaire (Korean version) were used to evaluate the effect of laser acupuncture treatment on lower back pain. <I>Results</I>. There were no significant differences in any outcome between the two groups, although the participants in both groups showed a significant improvement in each assessed parameter relative to the baseline values. <I>Conclusion</I>. Although there was no significant difference in outcomes between the two groups, the results suggest that laser acupuncture can provide effective pain alleviation and can be considered an option for relief from lower back pain. Further studies using long-term intervention, a larger sample size, and rigorous methodology are required to clarify the effect of laser acupuncture on lower back pain.</P>