The impact of Non-Tariff Measures on Firms’ innovation - Evidence from Chinese industrical firms

양범,왕우선,황운중 한국무역학회 2023 한국무역학회 세미나 및 토론회 Vol.2023 No.2

The Study of Selective Cu Electroplating for Though Glass Via

양범,왕성,이진현,곽병관,서진명,윤상화,유봉영 한국표면공학회 2023 한국표면공학회 학술발표회 초록집 Vol.2023 No.5

상흔형성 원인과 조직 재생 기전에 대한 고찰

양범석,이남택 대한창상학회 2008 Journal of Wound Management and Research Vol.4 No.2

Effects of Sr on the Characteristics of PZT Ceramics Prepared by Hydrothermal Process

양범석,신창윤,원창환 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.11

The sintering and electrical properties of the hydrothermal PSZT powders obtained by substituting 4, 6 and 8 mol% Sr for Pb in PZT lattice structure were investigated. The lattice constant and particle size decreased in proportion to a quantity of Sr. The sintering properties of PSZT powders showed 7.754 g/cm 3 of sintered density and 4 μm of grain size at sintering temperature of 1250 o C. Curie temperature lowered gradually from 363.6 o C to 319.2 o C and relative dielectric constants increased rapidly by a quantity of Sr. In comparison to PZT, moreover, the quality factor of PSZT was increased more than three times with increase of Sr mole ratio, and piezoelectric constant (d31 and g31) was decreased. It was found that dielectric loss of PSZT was decreased by 0.574% which was half of PZT. The sintering and electrical properties of the hydrothermal PSZT powders obtained by substituting 4, 6 and 8 mol% Sr for Pb in PZT lattice structure were investigated. The lattice constant and particle size decreased in proportion to a quantity of Sr. The sintering properties of PSZT powders showed 7.754 g/cm 3 of sintered density and 4 μm of grain size at sintering temperature of 1250 o C. Curie temperature lowered gradually from 363.6 o C to 319.2 o C and relative dielectric constants increased rapidly by a quantity of Sr. In comparison to PZT, moreover, the quality factor of PSZT was increased more than three times with increase of Sr mole ratio, and piezoelectric constant (d31 and g31) was decreased. It was found that dielectric loss of PSZT was decreased by 0.574% which was half of PZT.

자전연소반응법에 의해 제조된 PZT의 전기적 특성에 미치는 Sr의 영향

양범석,신창윤,원창환,Yang, Beom-Seok,Shin, Chang-Yun,Won, Chang-Whan 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.11

PSZT are selected and SHS are applied to each system. The sintering properties of PSZT powders showed $7.754g/cm^3$ of sintered density and $4{\mu}m$ of grain size at sintering temperature of $1250^{\circ}C$. Curie temperature lowered gradually from $363.6^{\circ}C\;to\;319.2^{\circ}C$ and relative dielectric constants increased rapidly by a quantity of Sr. This remarkable contrast in dielectric properties with powder preparation methods, in this study, was not due to grain size and sintered density but rather a crystallinity and sinterability of synthesized powders, extra-supplied Pb during reaction, mol fraction of rhombohedral phase and purity of starting materials.

從朴槿惠訪中與韓中FTA看臺灣情勢的探討

楊凡逸(Young, Fan?I),鄭?元(Jung, Chang Won) 영남대학교 중국연구센터 2015 중국과 중국학 Vol.- No.24

박근혜 대통령은 취임 후 과거의 대통령들처럼 먼저 일본을 방문한 후 중국을 방문하는 관례와는 반대의 행보를 보였다. 이는 박근혜 대통령이 얼마나 대중국 외교를 중시하는 지를 보여주는 것이다. 이에 가장 큰 성과는 과거 대통령들이 보여줬던 긴장관계를 완화시키며 한?중 양국의 우호관계를 더욱 증진시킨 것이다. 한ㆍ중은 2012년 5월 자유무역협정 협상을 개시했다. 박근혜 대통령과 시진핑 주석이 베이징 인민대회당에서 발표한 공동성명에서 양국은 자유무역협정을 추진하기로 합의했다. 경제 협력을 강화한다는 측면에서 양국이 FTA체결을 얼마나 희망하는지 잘 보여주었으며, 양측 대표도 협상에 진척을 보이려 노력했다. 그리고 그 결과로 2014년 11월 협상의 체결을 선언하였다. 이와 같은 사실에 대해 가장 큰 영향을 받게 될 가능성이 있는 타이완은 〈환태평양 경제 동반자 협정〉(TPP)과 〈역내 포괄적 경제 동반자 협정〉(RCEP)등의 지역 무역기구에 가입하려고 노력하고 있다. TPP 12개 국가와 타이완의 무역액은 연 2000억 달러에 달하며 타이완 대외무역의 35%정도를 차지한다. RCEP 16개 국가와의 무역액은 연 3250억 달러로 대외 무역의 57%를 차지하고 있다. 이 두 기구에서 7개국은 중복되기 때문에 합산해 계산한다면 타이완 대외 무역액의 70% 정도를 차지하며 그 중요성은 두말할 필요도 없다. 특히 중국 국무원 타이완 사무판공실 장즈쥔(張志軍) 주임이 타이완 방문 시 호의적인 태도를 취하면서 타이완이 이러한 무역협정에 가입할 수 있는 기회가 날로 높아지고 있다. 본고는 대만학술계의 기본적 시각에 기초하여 최근 한ㆍ중 양국의 정치, 경제 및 군사 등 여러 분야의 협력으로 변화하고 있는 동북아 정세에서 타이완의 대응전략은 과연 무엇인가에 대한 내용을 고찰한 것이다.

쥐의 자궁에서 알카리성 포스파타아제의 분리 및 그 효소의 특성에 관한 연구

양범석,양철학 ( Beom Seok Yang,Chul Hak Yang ) 생화학분자생물학회 1985 BMB Reports Vol.18 No.1

Alkaline phoshatase (orthophosphoric monoester phosphohydrolase EC 3.1.3.1) which hydrolyzes a variety of monophosphate esters was purified from rat uterus, using butanol extraction, acetone precipitation, gel filtration on Sephadex G-150, affinity chromatography on Concanavalin A-Sepharose 4B, and isoelectric focusing. This enzyme has the molecular weight of 560,000 daltons by gel filtration and it is very unstable below pH 6.0 and the most stable between pH 8-9. This enzyme shows pH optimum shift of 0.62 pH with 10-fold increase in substrate concentration. Ionic strength in the reaction buffer affects the enzyme activity that is, increase in ionic strength decreases Km and increases the V_(max). The log V_(max) is primarily dependent on the square root of ionic strength. From the thermostability study, it may be concluded that alkaline phosphatase from rat uterus is a different isoenzyme from that of other rat tissues like placenta, liver, and intestine. Among divalent cation, Mg^(2+) is a good activator for the enzyme and Ca^(2+) shows an activation only when its concentration is more than 100 mM. The optimum pH of enzyme activation by Mg^(2+) does not coincide with the optimum pH of enzyme activity. This enzyme has a multiple pI values of pI 6.5-7.1 from the isoelectric forcusing. This enzyme strongly binds to DEAE-Sephadex not by the normal charge to charge interaction but by an uncertain interaction between the enzyme and DEAE-ligand. The bound enzyme activity is not eluted even with the high ionic strength buffer containing 1.2 M NaCl. But it can be eluted by the 1 M solution of 2-amino-2-methyl-1, 3-propanediol.

산처리된 활성탄소섬유의 Propylamine의 흡착특성

양범호,김병구,이영택,김시몽,조시형 한국연초학회 2003 한국연초학회지 Vol.25 No.2

In this work, Rayon-based activated carbon fiber(KF-1500) was treated by HN $O_3$ and $H_2$S $O_4$ with different conditions. Specific surface areas(SSA, $S_{BET}$) of the treated activated carbon fibers were decreased by acidic treatment but, total surface acidities and surface functional groups were increased. In spite of the decrease of SSA, propylamin(PPA) adsorption and removal ability by activated carbon fiber(ACF) were increased by nitric acid treatment compared with the raw-ACF(KF-1500) and coconut based activated carbon. However, acidic treated activated carbon fibers were available to removal for various amines and contaminants by adsorption.n.

순엽싸이로 상대습도 및 퇴적 시간 연구

양범호,정한주,한정호,김용옥,이문수,Yang Burm-Ho,Chung Han-Ju,Han Jung-Ho,Kim Yong-Ok,Rhee Moon-Soo 한국연초학회 2006 한국연초학회지 Vol.28 No.1

In this study, the effects of the relative humidity and storage time of blended tobaccos at total blending silo on cut tobacco equilibrium moisture contents, leaf moisture contents and migration of casing materials of tobacco types were investigated. To maintain the cutting moisture content(21 $\pm$ 1 %), it is necessary to keep 75 % relative humidity at 28 $^{\circ}C$ at total blending silo. The moisture content of reconstituted tobacco sheet was changed from $13{\sim}14$ % to $19{\sim}21$ % within 2 h after preblending. The contents of glycerin and fructose of tobacco types followed by storage time after preblending were not changed significantly. From these results, it is suggested that 2 h storage time after preblending was sufficient to maintain physical properties of cut tobaccos and tobacco taste and fragrance.

Alkaline Phosphatase from Rat Uterus: Purification and Characterization

양범석,양철학,Yang, Beom-Seok,Yang, Chul-Hak 생화학분자생물학회 1985 한국생화학회지 Vol.18 No.1

알카리성 포스파타아제를 쥐의 자궁으로부터 부탄올 추출, 아세톤 침전법, 세파텍스 G-200을 이용한 젤 크로마터그래피법, 콘카나발린 A를 이용한 흡착 크로마토그래피법, 그리고 등전초점화법을 이용하여 정제하였다. 이 효소의 분자량은 560,000달톤이었고 pH 6 이하에서는 매우 불안정하나 pH8-9 사이에서는 가장 안정하였다. 열에 대한 안정도로 비교할 때 쥐 자궁의 알카리성 포스파타아제는 태반의 알카리성 포스파타아제와는 다른 효소였다. 효소활동도의 최적 pH는 기질의 농도가 증가 함에 따라 증가한다. 즉 10배의 기질 농도 증가에 대해 최적 pH는 0.62씩 증가한다. 반응용액의 이온강도는 효소 활동도에 영향을 미친다. 즉 이온강도가 증가함에 따라 $K_m$값은 감소하고 $V_{max}$는 증가한다. log $V_{max}$는 이온강도의 제곱근에 비례하는데 이것은 E-S 복합체에서 생성물로 가는 반응경로에 이온반응이 있음을 암시한다. 이 효소의 등전점은 pH 6.5-7.1사이에 넓게 분포하며 pH 6.8이 주둥전점이다. 이 효소는 $Mg^{2+}$ 이온에 의해 그 활동도가 크게 증가되나 효소활동도의 최적 pH는 서로 일치하지 않는다. 이 효소는 DEAE리간드에 강하게 부착되는데 이는 일반적인 단백질과 리간드 사이의 정전기적 인력에 의한 결합이 아니기 때문에 매우 높은 이온강도를 가지는 완충용액으로서도 리간드와 단백질을 분리할 수 없으며 단지 2-아미노-2-메칠-1, 3-프로판디올 1 M 용액으로 이 효소를 DEAE 리간드로 부터 분리할 수 있다. Alkaline phoshatase (orthophosphoric monoester phosphohydrolase EC 3.1.3.1) which hydrolyzes a variety of monophosphate esters was purified from rat uterus, using butanol extraction, acetone precipitation, gel filtration on Sephadex G-150, affinity chromatography on Concanavalin A-Sepharose 4B, and isoelectric focusing. This enzyme has the molecular weight of 560,000 daltons by gel filtration and it is very unstable below pH 6.0 and the most stable between pH 8-9. This enzyme shows pH optimum shift of 0.62 pH with 10-fold increase in substrate concentration. Ionic strength in the reaction buffer affects the enzyme activity that is, increase in ionic strength decreases $K_m$ and increases the $V_{max}$. The log $V_{max}$ is primarily dependent on the square root of ionic strength. From the thermostability study, it may be concluded that alkaline phosphatase from rat uterus is a different isoenzyme from that of other rat tissues like placenta, liver, and intestine. Among divalent cation, $Mg^{2+}$ is a good activator for the enzyme and $Ca^{2+}$ shows an activation only when its concentration is more than 100 mM. The optimum pH of enzyme activation by $Mg^{2+}$ does not coincide with the optimum pH of enzyme activity. This enzyme has a multiple pI values of pI 6.5-7.1 from the isoelectric forcusing. This enzyme strongly binds to DEAE-Sephadex not by the normal charge to charge interaction but by an uncertain interaction between the enzyme and DEAE-ligand. The bound enzyme activity is not eluted even with the high ionic strength buffer containing 1.2 M NaCl. But it can be eluted by the 1 M solution of 2-amino-2-methyl-1, 3-propanediol.