• 대한화학회지
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• 제46권6호
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• pp.523-527
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• 2002

LPG에서 황화합물의 분배계수에 미치는 영향에 관하여 연구하였다. 분석 대상 물질은 알칸계통에 사슬형머캡탄이었다. LPG의 액체상 및 기체상의 조성을 기체크로마토그래피로 분석하였다. SAS를 사용한 다중회귀분석방법(MLR)으로 황화합물의 끓는점(Bp), 온도(Tk), 용매의 조성(C4)과 관련되 분배계수를 다음과 같이 구할 수 있었다. Kpc=0.61222(${\pm}$0.000959)Bp+0.26984(${\pm}$0.06504)C40.003803(${\pm}$0.0019993)Tk, N=24, F=14.851, $R^2_{adj}$=0.6437. 분배계수에 미치는 중요 인자는 황화합물의 대기압에서 끓는점과 LPG의 조성이었다. n-부탄의 높은 조성 및 높은 온도에는 분배계수가 증가하여 가스의 취기 상승효과가 클 것으로 추측된다.

• 한국자동차공학회논문집
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• 제23권2호
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• pp.199-207
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• 2015

Solid materials of ammonia sources with SCR have been considered for the application of lean NOx reduction in automobile industry, to overcome complex problems of liquid urea based SCR. These solid materials produce ammonia gas directly with proper heating and can be packaged by compact size, because of high volumetric ammonia density. Among ammonium salts and metal ammine chlorides, calcium ammine chloride was focused on this paper due to low decomposition temperature. In order to make calcium ammine chloride in lab-scale, simple reactor and glove box was designed and built with ammonium gas tank, regulator, and sensors. Basic test conditions of charging ammonia gas to anhydrous calcium chloride are chosen from equilibrium vapor pressure by Van't Hoff plot based on thermodynamic properties of materials. Synthetic method of calcium ammine chloride were studied for different durations, temperatures, and pressures with proper ammonia gas charged, as a respect of ammonia gas adsorption rate(%) from simple weight calculations which were confirmed by IC. Also, lab-made calcium ammine chloride were analyzed by TGA and DSC to clarify decomposition step in the equations of chemical reaction. To understand material characteristics for lab-made calcium ammine chloride, DA, XRD and FT-IR analysis were performed with published data of literature. From analytical results, water content in lab-made calcium ammine chloride can be discovered and new test procedures of water removal were proposed.

• 한국수산과학회지
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• 제11권4호
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• pp.183-188
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• 1978

피등어꼴뚜기를 가열가공할 때 발생하는 취기를 제거할 목적으로 취기성분을 gas chromatography로 공석한 것을 단보로서 요약하면 다음과 같다. 1. 피등어꼴뚜기 취기성분 추출에는 methanol이 가장 적합하였다. 2. 빙수trap에서 25개 peak, dry ice-acetone trap에서 32개 peak가 검출되었고, 그 중 acetic acid, butyric acid, iso-valeric acid, valeric acid, caproic acid 등 5성분을 동정하였다. 3. 액체질소 trap의 head space vapor에서 11개 peak가 검출되었고, 그 중 mothylamine, trimethylamine, dimethylamine, ethylamine, isopropylamine등 5성분을 동정하였다.

• 한국식품과학회지
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• 제8권4호
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• pp.201-206
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• 1976

한국인삼(韓國人蔘)의 뿌리중(中)의 ether가용성분중(可溶成分中)에서 불령화물(不齡化物)을 검출(檢出)한다음에 Thinlayer chomatography법(法)과 Gas liguid Chromatography법(法)에 의해서 Sterol의 성분(成分)을 검출(檢出)하였다. 그 결과인삼중(結果人蔘中)에서 stigmasterol이 반치폭법(半値幅法)에 의하면 15.39%. 그리고 planimetry법(法)에 의하면 13.92%이었고 ${\beta}-Sitosterol$은 반치폭법(半値幅法)에 의하면 77.87% 그리고 planimetry법(法)에 의하면 82.72%로 가장 함량(含量)이 높았고 Campesterol은 반치폭법(半値幅法)에서는 6.74% 그리고 Planimetry법(法)에서는 4.36%가 됨을 알수 있다.

• 한국임상약학회지
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• 제19권1호
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• pp.65-68
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• 2009

Disposal infusion device is known to be useful for chemotherapy. Anti-cancer drug can be released by the force of carbon dioxide or balloon. In this study, we compared the$Anapa^{(R)}$ (LC0020) with B Company (LV2 ml) in terms of infusion rate and stability. Infusion rate was determined every six minute using software, MSI08IH. Stability of 5-fluorouracil was examined periodically using a High Performance Liquid Chromatography. Infusion rates of gas-derived $Anapa^{(R)}$ device were 2.29, 1.86, 1.98 ml/hr and those of balloon-derived B Company device were 1.71, 1.58, 1.37 ml/min. There were no significant differences in stability of 5-fluorouracil between $Anapa^{(R)}$ and B Company devices. In summary, gas-derived $Anapa^{(R)}$ device is thought to be comparable or superior to balloon-derived B Company device as far as infusion rate and stability are concerned. We expect that $Anapa^{(R)}$ as a home infusion device can be employed to improve a quality of life and compliance of cancer patients.

• Animal Bioscience
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• 제35권8호
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• pp.1195-1204
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• 2022

Objective: The objective of this study was to investigate the in vitro fermentation profiles of different soybean oligosaccharides (SBOs) and their effects on skatole production and cecal microbiota of broilers. Methods: Five SBOs with varying main component contents were fermented using an in vitro batch incubation inoculated with broiler cecal microbiota. Gas production was recorded automatically, skatole, indole and short-chain fatty acids (SCFAs) were determined using high-performance liquid chromatography, and microbial changes were analyzed using 16S DNA gene sequencing. Results: The addition of SBOs increased (p<0.05) gas production, suggesting bacterial growth-stimulating activities. In addition, the concentrations of indole were significantly (p<0.05) decreased after SBO supplementation, and SBO III, with higher sucrose and stachyose contents, decreased (p<0.05) the skatole level. Our results also revealed that the fermentation of SBOs by cecal microbiota produced (p<0.05) SCFAs, which were dominated by propionic acid, butyrate acid and lactic acid compared to the control. In addition, SBO III increased (p<0.05) the abundance of Firmicutes and Subdoligranulum and decreased that of Bacteroides. Conclusion: These results suggest that SBOs with higher sucrose and stachyose contents are promising prebiotics in modulating gut microbiota and reducing odor emission in broilers.

• Asian-Australasian Journal of Animal Sciences
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• 제22권10호
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• pp.1441-1446
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• 2009

Composition of intramuscular lipids, phospholipid classes and phospholipid molecular species in traditional Chinese duck meat products was investigated. Free fatty acids and phospholipids were identified and quantified by gas and high performance liquid chromatography, and phospholipid molecular species were determined by mass spectrometry. The results showed that raw duck meat had high quantities of phosphatidylethanolamine and phosphatidylcholine. The percentages of phospholipid classes decreased during three kinds of processing of duck meat products. A selective degradation of phospholipid molecular species with polyunsaturated fatty acids was found in dry-cured duck, but was not found in roasted and water-boiled duck products.

• Archives of Pharmacal Research
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• 제4권1호
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• pp.1-8
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• 1981

Our need for a convenient method of analytical estimation of the precise optical purity of d-2 aminobutanol (d-2AB) and d-ethambutol has prompted us to examine in detail the preparation and G. L. C. separation of the N-TFA-L-prolyl derivatives of their optical isomers (d-and l-2AB, d-, meso-and l-ethambutol). Silicon OV-1 columns were used for the G. L. C. separation.

• 한국식품영양학회:학술대회논문집
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• 한국식품영양학회 2001년도 동계 학술심포지움
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• pp.125-125
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• 2001

Total lipid contents were 0.58∼3.00% in 9 kinds of brown algaes, 0.47∼2.16% in 5 kinds of red algaes and 0.55∼2.99% in 2 kind of green algeas, respectively. Fatty acid compositions of the algaes were determined by gas liquid chromatography. Total polyenes and n-3 polyenes of linoleic acid(18:3), stearidonic acid(18:4), eicosapentaenoic acid(20:5) and docosahexaenoic acid(22:6) were 3.88∼57.57% and 1.46∼25.67% in the brown algaes, 5.30∼39.75% and 1.17∼21.91% in the red algaes, and 7.76∼19.27% and 3.67%∼10.61% in the green algaes, respectirely. The fatty acid contents and compositions of total polyenes and n-3 polyenes were vary different in the algae groups and sepecies.

• 생약학회지
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• 제10권1호
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• pp.13-16
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• 1979

The essential oil composition by means of gas liquid chromatography, and the occurrence and distribution of flavonoid glycosides in leaves, peels and barks of citrus plants native to Je Ju island were investigated. Results indicate that the occurrence of p-cymene, d,l-limonene, linalool, geraniol and linalyl acetate in the essential oils, and of hesperidin in leaves, peels and barks are fairly common to these species.