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고분자 분쇄 기술을 활용한 고체 알칼리연료전지용 이오노머 바인더 용액 개발
신문식,김도형,강문성,박진수,Shin, Mun-Sik,Kim, Do-Hyeong,Kang, Moon-Sung,Park, Jin-Soo 한국전기화학회 2016 한국전기화학회지 Vol.19 No.3
본 연구에서는 고체알칼리 연료전지용 이오노머 바인더 용액 제조를 위하여 poly(2,6-dimethyl-1,4-phenylene oxide)(PPO)를 동결 분쇄하고 4급 암모늄화 반응을 진행하여 음이온 전도성 이오노머(quaternized PPO, QPPO) 용액을 제조하였다. QPPO 이오노머 바인더 용액의 종류를 고분자의 분쇄 시간을 통하여 제조하였고, 이에 따른 분산도, 입자의 크기 및 전기화학적 성능 등을 분석하였다. 이를 통해 기존의 비 분쇄 고분자를 활용하여 제조한 이오노머 바인더 용액보다 분쇄 고분자를 활용한 이오노머 바인더 용액이 높은 고분자 분산도와 낮은 입자 크기를 확보하였다. 제조한 이오노머 바인더 용액(BPPO-G120s)의 최대 이온전도도는 $0.025S\;cm^{-1}$이었으며, 이온교환용량은 $1.26meq\;g^{-1}$을 보였다. In this study, an anion-exchange ionomer solution was prepared by grinding poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) in liquid nitrogen for solid alkaline fuel cells (SAFCs). Type of quaternized PPO (QPPO) solutions was controlled by grinding time. The ionomer binder solutions were characterized in terms of dispersity, particle size, and electrochemical properties. As a result, ionomer binder solutions using grinded polymer showed higher dispersion and smaller particle size distribution than that using non-grinded polymer. The highest ionic conductivity and IEC of the membrane recast by using BPPO-G120s were $0.025S\;cm^{-1}$ and $1.26meq\;g^{-1}$, respectively.
고분자 전해질 연료전지(PEFC)용 poly(arylene ether sulfone)/SiO<sub>2</sub> 복합막의 제조 및 특성분석
신문식,김다은,박진수,Shin, Mun-Sik,Kim, Da-Eun,Park, Jin-Soo 한국막학회 2017 멤브레인 Vol.27 No.2
본 연구에서는 고분자 전해질 연료전지(PEFC)의 전해질막의 화학적 안정성의 향상을 위하여 3-mercaptopropyl silica gel (3MPTSG)과 poly(arylene ether sulfone)(SPAES)을 이용하여 복합막을 제조하였다. 일반적으로 방향족 탄화수소계 고분자막은 전극 부분에서 발생한 라디컬에 의한 고분자 산화가 일어나 내구성이 감소하게 되는데 이는 대부분 주쇄에 포함된 에테르 기 부분의 취약성으로 발생한다. 본 연구에서는 이러한 라디칼에 의한 고분자 주쇄의 산화를 방지하기 위해 친수성의 무기물 입자를 도입하여 이온전도도 감소율을 최소화하고 산화안정성을 높이고자 하였다. 복합막들의 물성 및 전기화학적 특성을 평가하기 위해 접촉각, FT-IR, 이온전도도, 이온교환용량(IEC), 함수율, 열안정성 등을 수행하였다. 실리카의 함량이 0에서 0.5%까지 증가함에 따라 이온전도도 및 함수율은 각각 10% 감소한 0.076 S cm-1 및 16% 감소한 24.6 wt%이었으나, 산화안정성은 10% 향상되었다. Sulfonated poly(arylene ether sulfone) (SPAES)-3-mercaptopropyl silica gel (3MPTSG) composite membranes with improved oxidative stability were prepared for polymer electrolyte fuel cell application. It has been reported that ether part of main chain of aromatic hydrocarbon based membranes were weak to radical attack to decrease membrane durability. In this study, the hydrophilic inorganic particles were introduced by minimizing a decrease in ion conductivity and increasing an oxidative stability. The composite membranes were investigated in terms of ionic conductivity, ion exchange capacity (IEC), FT-IR, TGA and contact angle, etc. As a result, increasing amount of the 3MPTSG resulted in decrease in proton conductivities and water uptakes at 100% R.H. but enhanced thermal and oxidative stabilities.
몇가지 자포니카型 水稻 品種에 있어서 百葉枯病 抵抗性 遺傳子의 連關分析
Mun Sik Shin(申文植),Young Man Lee(李榮萬),Moo Sang Lim(林茂相) 한국육종학회 1990 한국육종학회지 Vol.22 No.3
In order to get necessary information to use different resistant genes to bacterial blight in Japonica rice breeding, Linkage relationship between resistant gene and marker genes were examined in F₁ and F₂ generations from 11 crosses. white hull was governed by a single recessive gene. Phenol positive reaction of Tamjinbyeo which is Japonica rice variety was governed by a single dominant gene. This ph⁺ gene belonged to the linkage group Ⅱ. The semi-dwarf height of Iri 374 was governed by a single recessive gene. This gene was designated tentatively as sd-7(t), which belonged to the linkage group Ⅱ. The Xa-1 gene identified in previous experiment was linked with the marker genes of linkage group Ⅱ, such as lg(liguleless), wh(white hull), Ph⁺(Phenol positive reaction), Pr(Purple hull), drp(dripping-wet leaf) and sd-7(t) (semi-dwarf gene of Iri 374) with the recombination value of 7.9, 14.1, 8.0, 22.7, 40.3 and 42.5 respectively. The recombination values between marker genes of lg-Ph⁺, lg-Pr, wh-Ph⁺, Ph⁺-Pr and lg-sd-7(t) estimated 16.4, 28.8, 10.4, 28.4 and 42.1 respectively. Therefore, the estimated serial loci were in the order of Igwh-Ph⁺-Xa-1-Pr-sd-7(t)-drp.
Inheritance of partial grain sterility in hybrids between japonica lines of rice
신문식(Mun Sik Shin),신현탁(Hyun Tak Shin),이재길(Jae Kil Lee),이선용(Seon Yong Lee),김종호(Chong Ho Kim) 한국육종학회 1995 한국육종학회지 Vol.27 No.1
The grain fertility of Iri390, HR7862 and HR7815 lines was more than 90%, whereas 87504 line ranged from 70% to 90%. Hybrid sterility was examined in the progenies of six crosses between these japonica lines. Partial sterility in Iri 390/87504, 87504/HR7862 and 87504/HR7815 combinations was controlled by two pairs of complementary genes and these genes segregated independently with z-2 (Chromosomell), Ph(Chromosome 4), z-4(Chramosome 8) and yp(unidentified) genes. Partial sterility in Iri 390/HR7862 and HR7815/HR7862 combinations was controlled by two pairs of duplicate genes, and these genes also segregated independently with Ph, z-4 and yp genes. On the other hand, there was not discovered any partially sterile plants in Iri 390/HR7862 progenies. This suggests that Iri390 and HR7815 lines have the same fertility genes.
몇가지 자포니카型 水稻 品種에 있어서 百葉枯病 抵抗性 遺傳
Mun Sik Shin(申文植),Young Man Lee(李榮萬),Hyun Tak Shin(申鉉卓) 한국육종학회 1990 한국육종학회지 Vol.22 No.2
This study was undertaken to get necessary information for breeding japonica rice cultivars resistant to bacterial blight. The segregation modes and allelic relationships of the gene for resistance to the HB8539(K₁race) isolate of bacterial blight were examined in F₁and F₂generations from 16 crosses. The resistance of Hwacheongbyeo, Tamjinbyeo and Iri374 was governed by the same single dominant gene. This gene was independent with Xa-3, Xa-4, and xa-5 genes, respectively. but was the same with Xa-1 gene already known.
신문식(Mun Sik Shin),김기영(Ki Young Kim),김보경(Bo Kyeong Kim),고종철(Jong Cheol Ko),이재길(Jae Kil Lee) 한국육종학회 2002 한국육종학회지 Vol.34 No.1
Conventional breeding method was used to pyramid three bacterial blight resistance genes, Xa1,Xa2and Xa3. Breeding lines with two and three resistance genes were developed and tested for resistance to the bacterial blight pathogen. Homozygous Fplants with
탄화수소계 전해질막 기반 막-전극접합체 제조를 위한 전사 기술
신문식 ( Mun-sik Shin ),송찬호 ( Chan-ho Song ),강문성 ( Moon-sung Kang ),박진수 ( Jin-soo Park ) 한국신·재생에너지학회 2017 신재생에너지 Vol.13 No.3
This study investigated the effects of the proton-exchanging conditions of the sulfonated poly (ether ether ketone) (sPEEK) membranes on the decal transfer rate. Various pre-treatment conditions of proton-exchanging the sPEEK membranes were used in terms of the acid concentration, temperature and time. The sPEEK membranes were analyzed to examine the effects of the acid concentration, temperature, and immersion time. The proton conductivities of the membranes were evaluated. The membrane electrode assembly, (MEA) of sPEEK membranes were fabricated by the decal transfer method. As a result, the pre-treated sPEEK membranes showed the highest proton conductivity (0.044 S cm<sup> -1</sup> , 0.16 meq g<sup> -1</sup> ) immersed in 0.5 M H<sub>2</sub>SO<sub>4</sub> for 2h, and it brought about the highest cell performance (0.39 A cm <sup>-2</sup> @ 0.6 V, 0.269 W cm <sup>-2</sup> ) due to a decrease in Ohmic resistance. Among the conditions for pre-treatment, the concentration of the pre-treatment acid solutions was found to be the most significant factor determining the proton conductivity of the membranes.
신문식(Mun Sik Shin),신현탁(Hyun Tak Shin),이선용(Seon Yong Lee) 한국육종학회 1995 한국육종학회지 Vol.27 No.4
Linkage relation between Xa-1 on chromosome 4 and resistance gene of Calrose to race K1 of bacterial blight pathogens was examined. Dominant resistance gene of Calrose newly identified in this experiment was designated as Xa-22 in tentative. Linkage relation between Xa-1 and Ph was in coupling, but that between Xa-22 and Ph was in repulsion. Xa-22 is located at Ph locus and is tightly linked with the recombination value of about 0.52% with Xa-1.
Mun Sik Shin(申文植),Ki Yong Ha(河基庸),Young Tae Lee(李暎泰),Du Ku Lee(李斗求),Hyun Tak Shin(申鉉卓),Byung Tae Jun(田炳泰) 한국육종학회 1991 한국육종학회지 Vol.23 No.2
This study was conducted to get necessary information to develop new resistant cultivars for bacterial blight. The disease index by natural infection of bacterial blight for fifty seven cultivars (Japonica 39, Tongil 18) was investigated in frequently flooding rice field at Haenam, Chonnam during the period 1985 to 1989. Ninety one isolates collected from natural infection field were tested their virulence to five differential rice varieties. The distribution ratio of K₁, K₂, K₃ and K₄ races was 28.6, 27.5, 38.5 and 5.5%, respectively. But K₄ race was not isolated from 1987 to 1989. On the other hand, K₁, K₂ and K₃ races showed nearly similar distribution ratio in 1989. The disease incidence of cultivars tested trended to decrease year by year. Among the cultivars possessing true resistance, the degree of natural infection of japonica group differed from that of tongil groups. This suggests that resistant genes of japonica cultivars differ from those of tongil cultivars. Yeongsanbyeo, Gehwabyeo, Seomjinbyeo and Daecheongbyeo(Japonica) ; and Baegyangbyeo, Taebaegbyeo, Samgangbyeo, Seogwangbyeo and Baegunchalbyeo(Tongil) showed resistant reaction in natural infection field.