• 한국수소및신에너지학회논문집
• /
• 제25권6호
• /
• pp.561-569
• /
• 2014

Ceria ($CeO_2$) was used to increase the durability of the membrane in the polymer electrolyte membrane water electrolysis (PEMWE) circumstance. The sulfonated polyether ether ketone (SPEEK) as polymer matrix was prepared in the sulfonation reaction of polyether ether ketone (PEEK) to improve electrochemical characteristics. After sulfonation reaction, the organic-inorganic blended composite membranes were prepared by means of sol-gel casting method with loading the highly dispersed $CeO_2$ and Cs-substituted molybdophosphoric acid (Cs-MoPA) with cross-linking agent (tetrapropyl orthosilicate). Consequently, the composite membrane CL-SPEEK/Silane 4wt%/Cs-MoPA/Ceria(1%) showed the improved characteristics such as 82% of water content, 0.11136 S/cm of proton conductivity at $80^{\circ}C$, 55.50 MPa of tensile strength and 4.37% of breeding out of MoPA.

• 사상체질의학회지
• /
• 제10권2호
• /
• pp.513-532
• /
• 1998

In order to investigate the effect of the Soyangin Yangkyuksanwhatang, Indongduengjigolpitang and Sookjiwhanggosamtang that are the model prescriptions for diabetic soyangin. The contents of serum glucose, insulin, total triglyceride and urine glucose, ketone-body and urine volumn and body-weights were mesured on the Alloxan-Induced diabetic Rats. The following results have been measured. 1. Yangkyuksanwhatang, Indonduengjigolpitang and Sookjiwhanggosamtang showed significant decreases on the serum glucose and particulruy Sookjiwhanggosamtang decreased significantly. 2. The contents of serum insulin on the Alloxan-Induced diabetic Rats comparing with normal group were increased in Yangkyuksanwhatang and Indongduengjigolpitang with no significance but Sookjiwhanggosamtang showed a significant increase on the serum insulin. 3. The contents of serum triglyceride were decreased in three groups, but Indongduengjigolpitang showed the significant decrease and others did not. 4. The contents of serum total cholesterol were signicantly decreased In indongduengjigolpitang but Yangkyuksanwhatang and Sookjiwhanggosamtang did not. 5. The contents of urine glucose simillary decreased in three groups. 6. The contents of urine ketone-body were not changed comparing with control group in Yangkyuksanwhatang and Indongduengjigolpitang groups, but Sookjiwhanggosamtang group showed some increase. 7. The urine volume were significantly decreased in Yangkyuksanwhatang, but Indongduengjigolpitang and Sookjiwhanggosamtang showed the decrease of urine volume with no significance. 8. Body weights were regained comparing with control group, but only Indongduengjigolpitang showed significant increase. According to the above results, Yangkyuksanwhatang, Indongduengjigolpitang and Sookjiwhanggosamtang had the effect for hyperglycemia, particulary Indongduengjigolpitang was assumed as having the effect for hyperlipemia and weight-loss induced by D. M.. Therefore, by this experiments it can be concluded that Yangkyuksanwhatang, indongduengjigolpitang and Sookjiwhanggosamtang recorded in "DongYi Soose Bowon" have the effect for soyangin diabetics.

• 한국수소및신에너지학회논문집
• /
• 제23권5호
• /
• pp.437-447
• /
• 2012

Ceria ($CeO_2$) was used to scavenge free radicals which attack the membrane in the polymer electrolyte membrane water electrolysis (PEMWE) circumstance and to increase the duration of the membrane. In order to improve the electrochemical, mechanical and electrocatalytic characteristics, engineering plastic of the sulfonated polyether ether ketone (SPEEK) as polymer matrix was prepared in the sulfonation reaction of polyether ether ketone (PEEK) and the organic-inorganic blended composite membranes were prepared by sol-gel casting method with loading the highly dispersed ceria and cesium-substituted tungstophosphoric acid (Cs-TPA) with cross-linking agent contents of 0.01 mL. In conclusion, CL-SPEEK/Cs-TPA/ceria (1%) membrane showed the optimum results such as 0.130 S/cm of proton conductivity at $80^{\circ}C$, 2.324 meq./g-dry-membrane of ion exchange capacity and mechanical characteristics, and 65.03 MPa of tensile strength which were better than Nafion 117 membrane.

• 농약과학회지
• /
• 제5권2호
• /
• pp.13-17
• /
• 2001

새로운 살균제를 개발할 목적으로 새로운 2-phenylimino-1,3-thiazoline 유도체를 합성하였다. Ketone dimer를 염소와 반응시킨 다음 중간체 8a의 분리없이 benzylamine으로 처리하여 ${\gamma}-Chloro-{\beta}-keto$ benzylamide 10a를 얻었다. Methyl isothiocyanate와 aniline 유도체의 반응에서 얻은 thiourea 4를 10a와 acetone 용액 중에서 반응시켜 분리 불가능한 중간체 11 및 12를 거쳐 각각에 상응하는 2-phenylimino-1,3-thiazoline 유도체의 염산염 2를 얻었다. Thiourea 4의 phenyl기에 인접한 질소원자의 비공유 전자쌍의 도움으로 황원자의 친핵적 공격을 포함한 가능한 반응 mechanism을 논의하였다.

• Archives of Pharmacal Research
• /
• 제26권12호
• /
• pp.985-989
• /
• 2003

An efficient synthesis of 5-chloro-3-[4-(3-diethylaminopropoxy)benzoyl]-2-(4-methoxyphenyl)benzofuran (8), a potent $\beta$-amyloid aggregation inhibitor, is described. 5-Chloro-2-(4-methoxyphenyl)benzofuran (3) was obtained by the one-pot synthesis of 4-chlorophenol with $\omega$(methylsulfinyl)-p-methoxyacetophenone (1) under Pummerer reaction conditions, and it was followed by the desulfurization of the resultant 5-chloro-3-methylthio-2-(4-methoxyphenyl)benzofuran (2e). Acylation of benzofuran 3 with 4-(3-bromopropoxy)benzoyl chloride (6) gave the ketone 7, which was converted into compound 8 by the treatment of diethylamine.

• Bulletin of the Korean Chemical Society
• /
• 제15권3호
• /
• pp.204-209
• /
• 1994

Catalytic hydroacylation has been achieved by the reaction of 8-quinolinecarboxaldehyde (1) and various vinyl derivatives such as 2a, 2b and 2c with Wilkinson's complex (3) to give linear alkyl ketones, 4a, 4b and 4c, respectively. However, stoichiometric ligand-promoted hydroacylation of 2a and 2b with [$(C_8H_{14})_2RhCl]_2$ (5) resulted in a mixture of the branched alkyl ketones and the linear alkyl ketones in different ratios. Stoichiometric hydroacylation of some other olefin derivatives such as 6, 11, 12 and 26, produced functionalized alkyl ketone compounds.

• 농약과학회지
• /
• 제2권3호
• /
• pp.45-51
• /
• 1998

방향족 고리로서 2-pyridyl이나 phenyl group이 치환($R_{1}$)된 비스 방향족 ${\alpha},{\beta}$-불포화 케톤 기질 유도체중 치환($R_{2}$) phenyl backbone의 변화에 따른 벼도열병균(Pyricularia oryzae)과 토마토 역병균(Phytophtora infestans) 및 보리횐가루병균(Erysiphe graminis)에 대한 항균활성과 물리화학 파라미터들 사이의 정량적 구조-활성관계(QSAR)를 검토하였다. phenyl 치환체, $1{\sim}11$의 벼도열병군에 대한 항균활성은 전자밀게에 의한 공명효과(R<0)와 소수성(${\pi}$>0), 토마토역병균의 경우에는 적정값의 STERIMOL 파라미터인 치환기의 길이$((L_{1})_{opt.}=5.69({\AA}))$ 그리고 보리흰가루병균은 적정값의 소수성((${\pi})_{opt.}=0.38$)에 의존적이었다. 또한, 2-pyridyl 치환체, $12{\sim}28$에 있어서 벼도열병균$(M_{R})_{opt.}=39(cm^{3}/mol)$과 토마토 역병$(M_{R})_{opt.}=8.04(cm^{3}/mol)$은 적정값의 분자굴절상수($M_{R}$)와 Taft의 입체효과(Es), 그리고 보리 흰가루병균의 경우에는 Es와 정전위(EP), 그리고 LUMO 에너지(e.v)가 항균활성에 각각 영향을 미치는 요인이었다. 그리고 보리흰가루병균의 경우 두 치환체들의 항균활성 관계는 서로 비례관계를 보이는 경향이었다.

• 한국식품과학회지
• /
• 제34권3호
• /
• pp.351-355
• /
• 2002

김치를 이용한 고기 스테이크 소스를 동시 증류 추출법을 이용해 얻은 휘발성 성분을 분석한 결과 23종의 성분이 분리 동정되었다. 분리동정된 화합물들 중에서 aldehydes가 5종으로 가장 많았고, alcohols 4종, acids가 4종, 함황화합물이 3종, ketone 1종 그외 기타화합물 6종으로 나타났다. 분리 동정된 성분들 중 eugenol 성분이 39.40%로 가장 많았고, 다음은 dodecanoic acid 4.91%, acetic acid 1.70%, methyl 2-propenyl disulfide 1.52%, hexanal 1.51%, 2-pentylfuran 1.18%를 차지하는 것으로 나타났다. 김치의 휘발성 성분 중 김치의 휘발성 향기 성분에는 diallyl disulfide, dimethyl trisulfide등의 sulfide류와 acetic acid, decanoic acid, dodecanoic acid 등의 acid류가 영향을 많이 미치는 것으로 나타났다. 시료를 3배씩 희석하여 실시한 olfactory 검사에서는 RI 값 1030에서 1357까지는 대체적으로 달콤한 사탕의 향기가 강하게 나타났고, RI 1561에서는 좋지 않은 냄새가 나타났으며, RI 2000에서는 alkane향이 GC/O에서 강한 시큼한 김치 냄새가 나타났다. RI 2057에서는 sweet한 냄새가 났었고, RI 2122에서는 clover향이 나타나 eugenol 화합물로 확인되었다. RI 2251에는 rancid 향이 강하게 나타났다. 따라서 김치를 주재료로 한 스테이크용 소스는 김치를 담근지 2주 정도가 경과된 $pH\;4.0{\sim}4.7$, 총산도 $0.5{\sim}0.8%$ 김치를 이용하여 소스로 만들었을 경우에 휘발성 성분의 품질에 영향을 미치며, 이를 이용하여 상품화한다면 우리나라 전통식품을 이용한 수출용 산업대체 식품으로 더욱 더 폭넓게 이용될 수 있을 것으로 사료된다.

• 대한환경공학회지
• /
• 제36권4호
• /
• pp.231-236
• /
• 2014

톱밥은 목재부산물로 생산되는 바이오매스 자원으로 액화할 경우 가솔린에 함유된 고옥탄가 물질과 유사한 화학구조를 가지고 있기 때문에 액체 연료물질로서 사용할 수 있는 가능성이 높다. 본 연구에서는 톱밥의 열화학적 전환방법으로 아세톤-용매분해반응을 실시하여 반응온도, 반응시간, 용매의 종류가 미치는 영향과 분해 생성물 등과 같은 분해특성을 조사하였다. 아세톤-용매분해반응에 의해 톱밥으로부터 생성된 액상 생성물은 다양한 케톤, 페놀 및 퓨란 화합물이었다. 액상생성물의 연소열량은 7,824 cal/g이었으며, $350^{\circ}C$, 40분에서 액상생성물의 에너지 수율과 질량수율은 각각 60.8%, 386.4 g-oil/100 g-sawdust를 얻었다. 아세톤을 사용한 톱밥의 용매 열분해 반응시 생성된 주요물질은 4-methyl-3-pentene-2-one, 1,3,5-trimethylbezene, 2,6-dimethyl-2,5-heptadiene-4-one, 3-methyl-2-cyclopenten-1-one 등과 같은 케톤화합물로서 고옥탄가의 액체 연료로 사용 가능한 물질인 것으로 판단되었다.

• 한국신재생에너지학회:학술대회논문집
• /
• 한국신재생에너지학회 2010년도 추계학술대회 초록집
• /
• pp.85.2-85.2
• /
• 2010

There is widespread effort to develop polymer membranes in place of Nafion for high temperature polymer electrolyte membrane fuel cell(PEMFC). In our study, SiO2 membranes are arranged by electrospinning method. For impregnation solution, the modified sulfonated poly(ether ether ketone)(SPEEK) polymer is prepared from sulfonation, sulfochlorination, partial reduction and lithiation reaction. The modified polymer is cross-linked with 1,4-diiodobetane in NMP solvent and then blended with Heteropoly acid(HPA). The characterization of membranes is confimed by FT-IR, Thermogravimetry(TGA), water uptake test and single cell performance test for PEMFC, etc. The composite membrane shows satisfactory thermal and mechanical properties. Beside, The membrane exhibits good ion exchange capacity and high proton conductivity. As a result, The composite membrane is promising as an alternative membrane in high temperature PEMFC.