韓國産 표고버섯 飮料의 品質에 關한 硏究

鄭永化,趙德鳳,崔春淳,馬相朝 광주보건대학 1984 論文集 Vol.9 No.-

To develop a beverage indigenous to Korea, Extracts from the mushroom were investigated for their chemical composition, extraction conditions and processing methods. Mushroom, Lentinus edodes which had been dried at 50℃ for 20 hours were extracted with hot water for 5 minutes, respectively. Fructose(10%, w/w) and licorice extracts(4 %, v/v) were added in the extracts. In an attemt to evalluate the quality of food by sensory testing, the difference testing for samples was conducted by selected members of a sensory panel. The results of the present study were as follows: 1. Amino acids of the final products were mostly composed of threonine and prolamine, glutamic acid, arginine, alanine, phenylalanine, etc. 2. GMP content of the final products was 2.09%(w/v). 3. It was concluded that extracts from the mushroom processes sufficiently acceptable qualities as a favorite beverage.

Saururus Chinensis의 지방산 및 아미노산의 성분 연구

鄭悳商 제주대학교 1992 논문집 Vol.35 No.-

The fatty acids and amino acids in Saururus chinensis, native to Korea, were isolated and identified by gas chromatograph using glass capillary column and amino acid analyzer. Thirteen fatty acids and seventeen amino acids were identified.

한국에서 자생하는 Saururaceae의 성분에 관한 연구(4)-Houttuynia cordata의 Flavonoid 성분

정덕상,최광훈,권순자 濟州大學校 基礎科學硏究所 1992 基礎科學硏究 Vol.5 No.1

Four flavonoids such as quercitrin, rutin, hyperin and isoquercitrin were isolated from the aerial parts of Houttuynia cordata growing in Korea, and identified by the comparison of their TLC, GC and HPLC chromatogram with those of pure authentic compounds, and reynoutrin and afzerin reported were not detected.

有機態 燐酸과 칼슘의 葉面撒布 및 灌注處里가 배(Pyrus pyrifolia N.) 樹體生育과 果實 品質에 미치는 影響

鄭賢德,李相炫,金月洙 전남대학교 농업과학기술연구소 2000 農業科學技術硏究 Vol.35 No.-

To establish the system of orchard fertilization the study was to carried out by foliar spray and fertigation with organic calcium and phosphate in the five year old 'Youngsan' pear trees (Pyrus pyrifolia) planted in Kochang, Chonbuk. The five hundred times diluted solutions of organic calcium and phosphate were sprayed on the surface of pear leaves at intervals of 7 to 10 days from June 1 to August 31. Also five hundred times diluted solutions of organic calcium and phosphate were fertigated under the canopy at intervals of 7 to 10 days from June 1 to August 31. The calciums treatments with foliar spray as well as feritgation increase leaf size on twigs and shoots. Meanwhile organic phosphate treatment showed smaller leaf size in shoots and large on twigs. Calcium content of leaves was higher by the treatment of foliar spray and fertigation. Phosphate content of leaves was much higher by the treatment of organic phosphate. In inorganic substance of fruit peel tissues, calcium content was high by the treatment of organic calcium + phosphate. On the other hand phosphate content in flesh of fruit was high by the treatment of organic phosphate. Fruit weight and firmness were increased by the treatment of organic calcium. Soluble solid was high by the treatment of organic phosphate.

Aminoaluminum Hydride에 의한 카르복시산 에스테르류의 환원반응

정덕상 濟州大學校 師範大學 科學敎育硏究所 1985 科學敎育 Vol.2 No.-

A method for the preparation of aldehydes from esters of carboxylic acids by use of diaminoaluminum hydrides such as bis (4 - methyl 1 - piperazinyl) aluminum hydride (BMPA) dimorpholionaluminum hydride (DMA) and dipiperidionaluminum hydride (DPA) was described. It was found that BMPA, DMA and DPA reduce esters of carboxylic acids of aldehydes in good yield very smoothly without accompanying alcohols.

GC 및 GC-MS를 이용한 Houttuynia cordata와 Saururus chinensis의 휘발성 성분의 비교

鄭悳商 제주대학교 1991 논문집 Vol.33 No.-

본 연구는 한국에서 자생하는 2종의 삼백초과 식물들의 휘발성 성분을 비교하기 위하여 수행되었으며, 그 결과를 요약하면 다음과 같다. 한국산 삼백초의 휘발성 성분을 처음으로 분리하여 확인한 결과, C??H??인 이성질체 화합물들이 주종을 이루었으며, 약모밀(한국산 및 일본산에서 도)-에서는 검출되지 않았던 benzodioxole 계통 의 Safrole(M.W. : 162)이 확인되었다. The volatile constituents in Sururus chinensis, growing in Korea, were isolated and identified by gas chromatography using glass capillary columns(OV-1, PEG-20M and SE-54) and GC-Mass spectrometry. The volatile constituents of Saururus chinensis were very diffent from those of Houttuynia cordata, that is, the former was mainly composed of sesquiterpenoids, while the latter monoterpenoids.

Au를 공침한 SnO₂후막센서의 가스 감응 특성

성정훈,강대원,이윤수,임준우,홍영호,이덕동 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

High selective and sensitive thick film type methane gas sensors were fabricated and their sensing characteristics for various hydrocarbon gases were investigated. Raw material, SnO_(2)/Au, prepared by coprecipitation was even grain size. SEM, TEM, BET and XRD analyses were carried out for investigation of surface morphology and crystalline structure. The thick film devices using the above materials exhibited high sensitivity to methane gas at the operating temperature of 400°C. The sensitivity of SnO_(2)/Au+Pd thick film devices to methane gas was higher than that to the other hydrocarbon gases such as iso-butane and propane. The optimal adding amounts of Au and Pd were 1wt.% and 3wt.%, respectively. The sensitivity, S, is defined as {(R_(A)-R_(G))/R_(A)}><100, which R_(A) and R_(G) are resistance in air and that in the gas ambient, respectively.

Synthesis and Characterization of Pr(Ⅲ)-,Sm(Ⅲ)-,Gd(Ⅲ)-,Dy(Ⅲ)-[18]HAM Complexes

정덕상,박신복,한충훈,변종철 濟州大學校 基礎科學硏究所 1998 基礎科學硏究 Vol.11 No.1

Lanthanide(III) and mercury(II) complexes of the 18-membered hexaaza Schiff base macrocycle 2,11,17,26,31,32-hexaazapentacyclo[26,2.1.1??,O??,O??] dotriaconta-1(31), 2,4,6,8,10,12,14,16(32) ,17,19,21,23,25,27,29-hexadecane([18]HAM) ahve been synthesized by the metal template condensationof phthalic dicarboxaldehyde and 2,6-diaminopyridine. Discrete mononuclear complexes [Pr([18]HAM)(NO₃)(OH)]NO₃·2H₂O,[Sm([18]HAM)(NO₃)(H₂O)(OH)]NO₃·2H₂O, [Gd([18]HAM)(NO₃)(H₂O)(OH)]NO₃·3H₂O, [Dy([18])HAM)(NO₃)₂(H₂O)₂]NO₃·2H₂O, and [Hg([18])HAM)(H₂O)₂(ClO₄)]ClO₄· ?H₂O, have been synthesized by using the respective hydrated lanthanide(Ⅲ) nitrate and mercury(Ⅱ) perchlorate as the template. The lanthanide(Ⅲ)-marcrocyclic complexes (lanthanide(Ⅲ)-[18]HAM) was decomposed by c-HClO? forming [18] HAM and liberating the lanthanide(Ⅲ) ion. Co(Ⅱ)- Ni(Ⅱ)-Cu(Ⅱ)-complexes of acyclic, potentially tridentate compartmental Schiff bases ([9]acy) complexes containing d-metal ion Co(Ⅱ), Ni(Ⅱ), and Cu(Ⅱ) ion have been prepared by using metal template condensation of phthalic dicarboxaldehytde and 2,6-diaminopyridine. The complexes and macrocycle were characterized by elemental analysis, fast atom bombardment mass spectrometry, infrared spectroscopy, and molar conductivity. The template potential of the lanthanide(Ⅲ) cations of various sites in the assembly of [18]HAM is due to the flexibility of the macrocycle to adapt to the geometrical requirements of the metal ions and to the steric demands of the exocyclic ligands

Saururus chinensis의 Flavonoid성분 연구

鄭悳商 濟州大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.8 No.1

Four Flavonoids such as isoquercitrin. hyperin, quercitrin and rutin were isolated from the aerial parts of Saururus chinensis growing in Cheju. and identified by the comparision of their TLC. GC, and HPLC chromatogram with those of pure authentic compounds.

완전미에 대한 소비자 지불가치 평가

오상헌,이순석,박평식,정호근,이상덕 한국국제농업개발학회 2003 韓國國際農業開發學會誌 Vol.15 No.2

본 분석은 최근 고품질 농산물에 대한 소비자의 관심이 높아가고 있음을 착안하여 서울지역 주부를 대상으로 완전미에 대한 소비자 지불가치를 추정하였다. 가치추정 방법은 다중범위 이산선택 기법을 사용하였으며, 구매유형별 소비자 선호요인을 분석하였다. 또한 추정된 평균값을 근거로 서울지역에서 판매가능한 완전미의 총 소비자 지불가치를 추정하였다. 분석결과를 요약하면 다음과 같다. 1. 완전미에 대한 소비자 선호분석 결과 “구입할 것” 형에서 통계적 유의성을 가지는 변수는 월소득, 교육수준 및 주거형태로 나타나 월소득이 높을수록, 교육수준이 높을수록, 아파트에 거주할수록 완전미 구입의향이 높게 나타났다. “반반이다” 형에서는 주거형태(HOU)가 1% 유의수준에서, 주부의 가구당 월소득(INC), 교육수준(EDU) 및 가구원수(FAM)가 각각 5% 유의수준에서 통계적 유의성이 있는 것으로 분석되었다. 2. 완전미에 대한 소비자의 구매 유형별 평균 지불의사 금액은 일반 쌀보다 최소 1.13배에서 최대 1.55배까지 비싸더라도 구입의사가 있는 것으로 분석되었다. 3. 조사대상 지역인 서울에서 완전미가 전면적으로 판매될 경우 추정 가능한 소비자 지불가치의 총액은 가장 적극적인 구매의향을 나타내는 “반드시 구입” 형은 2.154십억 원, “반반이다” 형은 2.955십억 원으로 추정되었다. 위와 같은 분석 결과는 일반 쌀보다 높은 가격을 지불하더라도 품질이 우수하다면 국산 쌀도 충분히 경쟁할 수 있음을 나타내고 있다. 아울러 최근 연구가 활성화되고 있는 다양한 기능성 쌀에 대해 소비 및 유통 측면에서의 심도 있는 접근이 이루어져야 함을 시사하고 있다고 결론 지을 수 있다. This study aims to estimate the consumers' value of the head rice using the multi bounded discrete choice CVM. The respondents were a total of 1,000 housewives living in Seoul. The results show that householders are willing to pay 3,480won/㎏, 2,920won/㎏ and 2,537won/㎏ for the head rice asuming three scenarios(not sure, sure, definitely). Results also show that in Seoul province the estimate aggregated buying value of the head rice is approximately 2,955 billion won in the definitely scenario.