딸기의 2차대사에 관하여 phenylalanine ammonia-lyase는 풍미나 색소, 향기 등에 큰 영향을 미치며 숙도 측정지표로 여겨진다. phenylananine amonia-lyase는 숙성 전단계에 걸쳐 활성을 나타내기는 하나 완숙기와 과숙기에 그 활성이 뚜렷이 증가하였다. 이는 딸기의 숙성과 더불어 de novo 합성이 되기 때문으로 보인다. 분자량은 겔 크로마토그래피로 260, 000으로 나타났다.

Thermograms of methylene blue(MB) in L-α-lecithin vesicle and incorporated purple membrane vesicle(InPM) systems have been studied by photochemical reaction differential scanning calorimetry at 25~55℃. Phase transition temperatures of lecithin vesicle, purple membrane(PM), and InPM were found to be independent of illumination of light(436nm) at 39~40℃, but endothermic phase transition was found in InPM vesicle. In MB-InPM system, endothermic phase transition was found on unillumination of light at 40~42℃, but exothermic phase transition was found on steady illumination of light at 48~52℃. It was estimated that the light energy absorbed from MB on vesicular surface was transferred to PM, and the transferred energy was redistributed to hydrophobic site of membrane. Therefore, the exothermic phase transition was measured at high temperature because of the increased hydrophobicity of acyl chain.

루마니아의 수도 Bucharest에 있는 “Grigore Antipa" 자연사박물관에 소장된 A. Caradja의 뿔나방과 모식표본(Type specimen) 40여종 중 현재까지 보고되지 않았던 21종의 암수생식기를 검경, 이들을 도해하였으며, 그들의 분류학적 위치를 재정리하였다. 타 연구자들에 의해 이미 생식기검경이 이루어졌던 13 종에 대해서는 그들의 분류학적 지위가 논의 되었으며, 금번 조사기간중 표본점검이 누락된 나머지 5종은 간단히 그들의 표본정보만 수록하였다. 본 조사결과 5종은 다른 속으로 이전, 재조합(comb. nov.)이 이루어졌으며, 4종은 새로운 synonym으로 정리하였다.

The biodegradation of high concentration of benzoate by enrichment culture with Pseudomonas sp. was investigated. During 50 days continuous culture, average of removal rate of benzoate and COD were 90% and 83%, respectively. And the enzymatic activity of catechal 2,3-dioxygenase was determined in the continuous culture but not Catechol 1,2-dioxygenase. On the other hand, Pseudomonas sp in the culture was investigated with SEM and the result was revealed that the cell shape was more demage according the higher concentration of benzoate.

This study was carried out to determine and confirm of Dapsone in vegetables and fruits which were illegally used for freshness. We have developed a simple, rapid and precise method that Dapsone can be analyzed in the cabbages, grapes and strawberry by HPLC with photodiode array detector. Experimental subjects were included 15 cases of cabbages, 10 cases of grapes and 10 cases of strawberries purchased in Kangwon, Chungchong province and the Seoul area. The results were obtained that Dapaone in the experimental subject was separated completely within 10 min. Detection limit of Dapsone was 0.5 ng. Aberage recoveries from cabbages, grapes and strawberries were 93.3±0.26%, 92.5±0..37%, 91.4±0..65% respectively. 4 cases of cabbages were detected Dapsone and the amount was below the 0.3 ppm. There was not detected Dapsone in any grape and strawberry samples.

Sprague-dawley 흰쥐를 고지방식이로 6주간 식이하면서 영지열수추출액을 경구투여하여 혈장, 간장 및 부고환조직에서 지방성분, 지단백질의 분포, 변 중의 담즙산과 중성스테롤들의 배출량을 측정하여 다음과 같은 결과을 얻었다. 고지방식이와 영지(GL군)열수추출액을 투여한 흰쥐의 혈청 중 총콜레스테롤, 중성지질 및 유리지방산의 농도는 고지방식이로만 사육한 대조군(CON군)에 비해 낮았다. 한편 인지질과 HDL-cholesterol의 농도는 다소 높았다. 또한 간장과 부고환의 지방성분들을 조사한 경우에도 위와 같은 결과를 얻었다. Low density lipoprotein(LDL)과 very low density lipoprotein(VLDL)은 고지방식이가 급여되는 동안 정상군 보다 대조군에서 증가하였고 영지투여군은 대조군에 비하여 LDL과 VLDL은 감소하였으나 HDL은 증가하였다. 그리고 분변을 통한 답즙산과 중성스테롤의 배설량이 증가하였다. 이상의 결과를 종합해 보면 영지 투여군이 지방축적 및 고지혈증의 완만한 개선경향을 나타내고 있음을 알 수 있다.

The antimutagenic effects of 46 kinds of medicinal plants that have been used as traditional folk antitumor agents in Korea were studied by using Ames mutagenicity teat. Most of the methanolic extracts from the plants which were used in this experiment showed strong antimutagenic activity toward atlatoxin B₁(AFB₁) in Salmonella typhimurium TA100 and TA98. However, N-methyl-N'-vitro-N-nitrosoguanidine (MNNG) induced mutagenicity was not blocked by adding the methanolic extracts of the plants except persimmon leaves (Diospyros kaki Thunberg) and Elaeagnus umbellata.