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폴리프로필렌 纖維用 Carbene染料의 開發에 關한 硏究
李學沂,林龍進,민경은 慶北大學校 1982 論文集 Vol.33 No.-
Reactive dyes, which reaction center is carbene, were prepared and the dyeability of polypropylene fiber by those dyestuffs was investigated. Furthermore, a new say of dyeing and an applied technique for pretreating polypropylene with carbenic precursor were studied to improve dyeability. In this experiment, ketones were used as starting materials because these are mostly common functional group in dyes and dyestuff intermediates. Ketones could be changed to tosylhydrazone derivatives by tosylhydrazine in methanol at 0℃ in the presence of aqueous hydrochloric acid. Reactive carbenic dyes were prepared by the reaction of n-butyllithium and these hydrazone derivatives in ethly ether solvent. Dyed polypropylene showed excellent endurance to the light and preserverance to laundry, which were confirmed by means of blue and gray scales. The fact that polypropylene was bonded covalently to dyestuff molecules was confirmed by extraction and reprecipitation. Using the aldehyde as the starting material, carbenic precursor was also prepared analogous route to the dyestuff. After pretreating polypropylene fiber with this precursor, dyeing pattern of fiber in acidic media with butyl orange showed similar adsorption curve which is the typical results of acidic dyeing process. It means that polypropylene could be dyed easily in acidic media if it had pretreated by carbenic precursor.
서중조건하에서의 콘크리트 충전 강관 기둥의 시공을 위한 실험적 연구
이장환,강용학,정근호,김진호,최문식,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
The basic Physical properties, Slump, Slump flow, Air content, Bleeding, and Settlement of concrete was investigated to test Characteristic of Setting and to evaluate the relation between Model specimen and Heat of hydration for construction Over the High Temperature(CFT). The objective of this study is to take the partial core after the cementation of Model specimen, test the compression intensity and analyze the relation to Test piece.
톨루엔을 포함한 유기용제의 직업적 폭로로 인한 신경내분비계 영향
이채언,이종태,정의화,손혜숙,문덕환,전진호,강정학,이창희,김휘동,김종한,정귀옥 大韓産業醫學會 1995 대한직업환경의학회지 Vol.7 No.2
Long term occupational exposure to solvent mixtures may cause adverse effects to the central nervous system with neurobehavioral symptoms. And some organic slovents have been suggested to cause impairment of tuberoinfundibular dopaminergic activity and neurochemical mechanisms controlling pituitary secretion. For the purpose of assessing neuroendocrine effects in occupational solvents exposure, hormonal study settings (shoes-manufacturing industry & fishing products industry) and compared with nonexposed controls(33 men, 85 women). Male workers exposed to solvent mixtures had significantly lower plasma level of follicle-stimulating hormone(FSH) than nonexposed male controls. While female workers exposed to solvent mixtures had significantly lower plasma levels of growth hormone(GH), and thyroid-stimulating hormone(TSH) than nonexposed female controls. The results of significant decrease in plasma concentrations of pituitary hormones(FSH, GH, and TSH) in workers exposed solvent mixtures indicate that occupational exposure to solvent mixtures may induce neuroendocrine effects through an effect on hypothalamic pituitary axis.
李學沂,林龍進 慶北大學校 1976 論文集 Vol.21 No.-
In order to investigate the possibility as a dyestuff, the spectra of imidazole azo derivatives were studied in comparison with phenyl azo ones. The λmax of imidazole azo derivatives was 17-23 nm longer wave region than that of phenyl derivatives and it means that imidazole azo dyes have more bathochromic effect than phenly azo dyes. The spectra of substituted 2'-oxyphenyl azo imidazole showed isosbestic points in accordance with the variation of pH range in the methanol-water solution. It will be due to the protonation and deprotonation of dyes in acid-alkali solution. The authors discussed these imidazole azo dervatives on the possibility as a disperse azo dye.
고강도 콘크리트(80MPa이상)를 이용한 콘크리트충전강관구조 적용을 위한 기초물성 연구
이장환,강용학,정근호,김진호,정상진,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
One of the most important reasons that CFT is used in many conditions is by using that we can achieve the effect, which reduce the section of the member. This research purpose to find the most ideal composition, which is achieved by the investigation in the concrete's property of matter like ability of Slump, Slump Flow, Air content, Bleeding, and Settlement when the high strength of concrete which is over 80MPa is used m the CFT column.
뭉툭맵시벌아과(벌목:맵시벌과)의 분류와 계통 : Ⅰ. 현상학적 분석 Ⅰ. Phenetic analysis
이종욱,차진열,박원학 嶺南大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.15 No.-
For the phenetic analysis of the subfamily Tryphoninae(Hymenoptera:Ichneumonidae), specimens were collected from March of 1988 to September of 1995 in the southem part of Korean peninsula. Specimens were also obtained from various museums and laboratories both in Korea and other counteries. This research utilized about 1000 domestic specimens and 3010 foregin specimens including 10 specimens from North Korea. Phenetic analysis was performed using these specimens (39 genera 39 species)and the following results were obtained. In the cluster analysis, the ward method is more effective than the average linkage method (within group and between group), while the use of total characteristics was resulted in more stable grouping than only quantitative or qualitative characteristics. The cluster and discriminant analyses suggested that the Townes(1969) and Townes et al.(1992)'s system is well fit for the classification of Tryphoninae. For the subfamiliar classification, the analyses of total characteristics by ward method resulted in the most accetable grouping.
李學沂,林龍進,沈相喆 경북대학교 공과대학 1971 工大硏究誌 Vol.1 No.-
The pyrolysis of dry lithiun salt of fumaraldehyde tosylhydrazone which was prepared by reacting fumaraldehyde and tosylhydrazine was studied. The products of therm a decomposition, acetylene, ethytlene and unidentified gaseous substances, were separated by GC to learn the ratio of the products which was variable according to the reaction conditions. The investigaton of the path route to form acetylene, ethylene and unidentified compounds remains for further work to learn the mechanism of tetrahedrane formation.
위암 환자의 복강내 투여를 위한 Activated Charcoal-Alginate Bead 제형으로부터 Mitomycin C의 용출 거동
이진호,최선웅,서중기,김동민,정경수,오정연,김진향,노승무,민병무,김용백,김창식,박근성,강대영,송규상,양준묵,조준식,정현용,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1
Locoregional recurrence is the most common type of recurrence in surgical operation of gastric adenocarcinoma, and peritoneal dissemination is one of the most difficult problems in advanced gastric adenocarcinoma treatment. Because the peritoneal cavity is the most common site of the first recurrence after gastric cancer resection, intraperitoneal chemotherapy seems a logical choice for cancer chemotherapy. In this study, Mitomycin C (MMC)-activated charcoal (CH)-alginate (ALG) beads were prepared by the mixtures of CH particles adsorbed with MMC as an anti-cancer drug and aqueous alginate solution. The alginate is recognized as biodegradable, nontoxic, and biocompatible. The release of MMC from the beads in 0.1 M Tris buffer was stable and continuous until about 1 week. The MMC-CH-ALG beads can be applied in the peritoneal cavity for intraperitoneal chemotherapy since they provide a good adhesiveness on the tissue and controlled release pattern of the drugs.
李相來,鄭丁采,金鶴鎭 順天大學校 1983 論文集 Vol.2 No.1
全南地方에 있어서 食用獨活의 地下莖에는 翌春에 嫩莖이될 芽(crown bud)가 形成되여 있으나 翌年度에 發芽되는 莖數와의 相互關係를 알고 收穫期間의 決定의 資料를 얻고자 全南地方의 推定 收穫 限界期라고 生覺되는 5月 下旬까지만 莖을 除去하고 그 以後부터서 가을 霜降時까지 그대로 放任한 區와 嫩莖이 發達한 直前의 月末까지(7月末日) 收穫하였다가 그 後 부터서 霜降까지 그대로 放任한 區等의 3個의 試驗區를 亂塊法 三反覆으로 試驗하였으니 그 結果를 要約하면 다음과 같다. 1. 前年度 가을에 芽數와 翌年 發生 莖數와의 높은 相關을 認定할 수 있었다. 2. 收穫 期間이 가장 길었던 7月末 까지의 收穫區는 越冬前 根群을 調査한 結果 根群 發生이 不良하여 減收의 原因이 되였다. 3. 發生 莖數는 越冬前의 芽數와 多小 關係가 있는 것 같으나 收穫期의 長短이 더욱 큰 影響을 주었다. 4. 全南地方의 收穫 限界期는 5月 末日까지로 보는 것이 좋을 것 같다. This experiment was conducted to investigate the ecological characteristics of Japanease udo in Chonnam area. During the summer and autumn poriod after the previous year cutting crownbuds of Japanease udo which is edible spears in the following spring are formed. This study was made to dertimine the relationship between the number of corwnbuds in the previned and the number of ber of stalks produced in the following season. The results obtained were as follows: previous num- 1. There was a highly positive correlation between the sum of spears and stalks produced. 2. The plots harvested until the end of July were caused low yield due to the poor development of root system. 3. The number of stalks produced were slightly correlated with the crownbuds of previous year but the length of the harvesting period were influenced severely. 4. The marginal harvesting period of Japanease udo in Chonnam area were determined to the end of May. previous autumn and the num-