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고등학교 화학교과서 화학(Ⅱ) 교과 내용중 실험의 비교 분석
박택규 建國大學校 敎育硏究所 1985 論文集 Vol.9 No.-
Five new editions of Senior high school chemistry Textbooks(entitled Chemistry Ⅱ) used since the 1984 school year have been analyzed, in respect to the their experimental titles and contents. The number of the experiments contained in the Textbooks is 16 in Textbook A, 20 in Textbook, B, 17 in Textbook C, 18 in textbook D, and 20 in Textbook E. The number of illustrations used in explication of the experiments is 10 in Textbooks A and B, 11 in Textbook C, 9 in Textbook D, and in Textbook E, in particular, the number almost doubles to 20. Every book except Textbook E has a chapter or two which contain no experiment, namely chapter Ⅲ in Textbook A, chapter Ⅲ and Ⅳ in B, chapterⅢ in C and chapter Ⅲ in D. Each Textbook shows a characteristic in the titles and content explanation of experiments of their chapters.
담배 연기중(煙氣中)의 유해물감소(有害物減少)에 관한 연구(硏究)[제이보(第二報)] -용매추출(溶妹抽出)의 영향(影響)-
박택규,김기환,Park, Taek-Kyu,Kim, Ki-Hwan 한국응용생명화학회 1979 Applied Biological Chemistry (Appl Biol Chem) Vol.22 No.1
담배향기성분에는 영향을 미치지 않고 엽중(葉中)의 nicotine이 용매추출(溶媒抽出)로서 제거되는 효과를 규명하고 연기중의 tar, nicotine함량(含量) 및 무처리(無處理)와 처리(處理) 담배에 대한 이화학성(理化學性)을 시험하여 다음과 같은 결과를 얻었다. 1) 3%알콜추출로 황색종잎담배의 전질소함량은 36.4%가 감소(減少)되었고 당(糖)은 감소(減少)되지 않았다. 2) 용액의 침지시간이 길수록 엽중(葉中)이 nicotine함량(含量)은 감소(減少)되었고 산성용액이나 알칼리성용액을 첨가한 용액에서도 대체로 같은 결과를 얻었다. 3) 열중량분석(DTG)골선은 담배성분중 $150^{\circ}{\sim}350^{\circ}C$에서 분해(分解)되거나 휘발되는 성분이 추출되었음을 나타냈다. 4) 3% 알콜용액 추출에서 (1) filling power는 황색종과 burley 각각 10%와 24%의 개선효과(改善效果)가 있었으며, (2) 연소성(燃燒性)은 burley와 황색종담배에 각각 3분과 2분이 단축되었으며, (3) nicotine의 감소율(減少率)은 burley와 황색종 담배에 각각 61.5%와 54.5%이었고, (4) tar의 감소율(減少率)은 burley와 황색종 담배에 각각 23%와 15%이였다. The solvent extracting of the tobacco has been carried out in order to find out any effects for the removal and/or reduction of nicotine from tobacco without affecting the tobacco flavor. We have now completed the physico-chemical characterization of the solvent untreated/treated tobaccos and 2) the contents of the tar and nicotine in the smoke. The results obtained ate like followings; 1. 3% alcohol extraction reduced the total nitrogen content for the Bright by 36.4%. However, it could not reduce the sugar content. 2. Nicotine content in tobacco leaves was inversely proportional to the dipping time Essentially same results were obtained in anacidic solution and even in a solution containing both alkali and acid. 3. Derivative thermogravimetric(DTG) curves indicated test extraction was effective by removing tobacco leaf components which could decompose or volatilize between the temperature of $150^{\circ}C\;and\;350^{\circ}C$. 4. 3% alcohol extracted leaf have the substantial improvements as following; (1) bulk filling power of 10% and 24% for Burley and Bright tobacco, respectively, (2) combustibility shortening of about 3 minute and 2 minute for Burley and Bright tobaccos, respectively, (3) reduction ratio(%) of nicotine was found to be shout 61.5% and 54.5% for Burley and Bright tobacco, respectively, (4) reduction ratio (%) of tar was obtained to he about 25% and 15% for Burley and Bright tobacco, respectively.
HPLC에 의한 암환자의 요 중 아미노산 정량에 관한 연구
박택규,박수경,박정오 대한임상화학검사학회 1995 대한임상화학검사학회지 Vol.6 No.1
The concentration of free amino acids in urine of control groups and cancer patients were determined by reversed phase high performance liquid chromatography using pre-column derivatization with dansyl chloride and UV detection at 254 nm. Urine samples from the cancer patient of stomach. liver, gall bladder and pancreatic cancer showed a decrease of concentration in all amino acids except for methionine, isoleucine, glutamic acid and alanine as compared with the control groups. The concentration of alanine was most increased of all amino acids, whereas. that of lysine was most decreased. The decrease rate of essential amino acids was larger than that of nonessential amino acids. The concentration of essential amino acids compared with control groups in cancer patients decreased by 20-50%, whereas that of nonessential amino acids decreased by 15∼25%. The ratio of essential to nonessential amino acids (E/NE ratio) in control groups and cancer patients was 0.669 and 0.435, respectively. The ratio in cancer patients compared with control groups was decreased by 34.98%.