• Korean Journal of Food Science and Technology
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• v.31 no.6
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• pp.1465-1470
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• 1999

Aroma was extracted from Applemint(Mentha rotundifolia(L.) Huds) with SDE(simultaneous distillation and extraction), SFE(supercritical fluid extraction) and headspace method and the compounds of aroma were tentatively identified with GC-MS. The functionality of aroma compounds were determined with GC-olfactometry. Total 67 compounds were identified. Among them, 39 compounds were determined from SDE, 42 from SFE and 16 from headspace extract. Many terpene compounds were extracted with SDE and headspace methods but hydrocarbones with SFE. The major constituents of aroma obtained from SDE and SFE, were piperitenone oxide, germacrene-D and trans sabinene hydrate, but those from headspace method were 3-octanol, 1,8-cineol, camphene and benzeneacetaldehyde. Results of sniffing test, determining characteristics and strength of aroma showed that the major constituents of SDE extract were refreshing sweet and apple-like(ethyl-2-methyl butanoate), sweet and fruity-like$({\alpha}-thujene)$, fresh mushroom-like(1-octen-3-ol, 3-octanol), and bitter herb-like$({\delta}-cadidene)$. Major constituents of aroma extracts obtained from headspace method were alcoholic, refreshing sweet and apple-like(ethyl 2-methyl butanoate), unpleasant chemical, and bitter herb and grassy-like(camphene).

• The Korean Journal of Pain
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• v.6 no.1
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• pp.67-73
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• 1993

소의 신선한 대뇌피질로부터 synaptosomal plasma membrane vesicles(SPMV)를 분리한 후 이 SPMV로부터 추출한 모든 인지질들로서 제제한 인공세포막(SPMVPL)에서의 n-alkanols 침투 정도를 형광 probe를 이용한 형광 소광법을 통하여 검색하였다. n-alkanols는 SPMVPL 외부 단층(outer monolayer)의 표면에 주로 분포하되 그 탄소수에 비례하여 소수성 부위에 분포되는 양이 증가되는 경향을 나타내었다. methanol, ethanol, 1-propano, 1-butanol, 1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol 및 1-decanol은 SPMVPL 외부 단층의 표면(친수성 부위)에 분포되는 것이 소수성 부위에 분포되는 것에 비하여 각각 432.4, 208.9. 125.6, 88.2, 19.3, 7.9, 2.6, 1.0, 0.42, 1.36배가 되었다. 1-decanol은 $C_{10}$인데도 불구하고 $C_8$인 1-octanol에 비하여 적은 양이 소수성 부위에 침투 분포된다는 것이 확인되었다. n-alkanols의 침투에 대하여 저자등이 이미 보고한 바 있는 SPMV 및 SPMVTL(cholesterol+phospholipids)의 경우보다도 본 연구에서의 SPMVPL의 경우가 현저하게 많은 양이 소수성 부위로 침투 분포된다는 것도 확인되었다.

• The Korean Journal of Pain
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• v.6 no.2
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• pp.237-246
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• 1993

세포막에서 마취제의 작용점을 규명하기 위하여, 마취제의 많은 부분을 차지하는 n-Alkanol을 이용하여, 소의 synaptosomal plasma membrane vesicles(SPMV)에서 n-Alkanol의 침투 정도를 형광 probe를 이용한 형광소광법을 통하여 검색하였다. n-Alkanols는 SPMV 외부 단층(outer monolayer)의 표면에 주로 분포하되 그 탄소수에 비례하여 소수성 부위에 분포되는 양이 증가되는 경향을 나타내었다(1-decanol은 제외). Methanol, Ethanol, 1-propanol, 1-butanol, 1-pentano, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol 및 1-decanil은 SPMV 외부 단층의 표면(친수성 부위)에 분포되는 것에 비하여 각각 949, 416.8, 214.8, 90.3, 53.7, 15.20, 6.80, 2.00, 1.03 및 2.40 배가 된다는 것을 확인하였다. 1-decanol은 $C_{10}$인데도 불구하고 $C_8$인 1-octanol에 비하여 적은 양이 소수성 부위에 침투 분포한다는 것이 확인되었다.

• Journal of Powder Materials
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• v.18 no.4
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• pp.322-326
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• 2011

Inkjet printing was successfully done using Cu nano powder ink after these Cu nano powders were dry-coated with 1-octanethiol for oxidation prevention. 1-octanethiol, which is Self-Assembled Multi-layers (SAMs), was coated approximately 10-nm thick on the surface of Cu nano powders. 1-Octanol, which has the same chain length as that for 1-octanethiol, was used as a solvent to make the ink for inkjet printing. As a result, the fabricated ink was dispersed for about 4 weeks, and after printing and heat treatment at $350^{\circ}C$ for 4 hours, the resistivity for the printed pattern was measured to be $1.15{\times}10^{-5}{\Omega}{\cdot}cm$.

• Transactions of the Korean hydrogen and new energy society
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• v.34 no.6
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• pp.767-772
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• 2023

In this study, combustion experiments were conducted at various engine speeds under full-load conditions using a single-cylinder diesel engine by blending butanol, pentanol, and octanol with diesel at a volume ratio of 10%. Experimental results revealed that higher alcohol-diesel blends resulted in lower brake torque and brake power than pure diesel due to the lower calorific value and the cooling effect during evaporation. An evident improvement in the brake thermal efficiency of the blended fuels was observed at engine speeds below 2,000 rpm, with the butanol blend exhibiting the highest thermal efficiency overall. Furthermore, the brake-specific fuel consumption of the higher alcohol-diesel blends was lower than that of pure diesel at speeds below 2,200 rpm. When using blended fuels, the exhaust gas temperature decreased under lean mixture conditions due to heat loss to the air and the cooling effect from fuel evaporation.

• Journal of the Korean Chemical Society
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• v.35 no.5
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• pp.586-588
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• 1991

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2004.02a
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• pp.245-256
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• 2004

The extraction of three kinds of amido podands, N,N,N'N'-tetrabutyl-3-oxa-pentanedi- amide (TBDGA), N,N,N'N'-tetra-isobutyl-3-oxa-pentanediamide(TiBDGA) and N,N,N'N'-tetra- butyl-3,6-dioxa-oct-anediam- ide(TBDOODA) on U(VI),Pu(IV), Am(III), Eu(III) and other metal ions is studied in nitric acid solutions. 40%octanol-kerosene is chosen as diluents to eliminate third phase and emulsion. TBDGA and TiBDGA show extraction selectivity to An(III) and Ln(III) much higher than to U(VI) and Pu(IV). Fe, Ru and Mo is poorly extracted by the three kinds of amid podands in 2~3mol/L $HNO_3$ solutions. Aiming to eliminate interface crude when using simulated HLLW solution in the system of 0.2mol/L TBDGA/Octanol＋kerosene, acetohydroxyamic acid was adapted. Distribution ratio of zirconium was decreased when adding acetohydroxyamic acid in aqueous solution, and interface crude disappeared as mixing extractant with HLLW. The counter-current extraction test is carried out in a set of miniature mixer-settler, with 0.2mol/L TBDGA/ 40% octanol-kerosene as extractant to separate U(VI), Pu(IV), Am(III) and Eu(III) from simulated high level liquid waste(HLLW) solution. In battery A, lanthanides and actinides are coextracted into organic phase with the recovery of 99.98% for U(Ⅵ), >99.99% for Pu(IV), and >99.99% for Am(III) and Eu(III) respectively. In battery R1, 99.99% U, 86.2% Pu and a part of Am or Eu are stripped into aqueous phase by 0.2mol/L acetohydroxyamic acid (AHA) in 0.01mol/L $HNO_3$ solution. In battery $R_2$, Am, Eu and remained Pu are completely back-extracted by 0.2mol/L AHA. This separation process contains no salt reagent, and it is not necessary to dilute HLLW feed.

• Korean Journal of Plant Resources
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• v.19 no.1
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• pp.112-119
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• 2006

We investigated the changes in the volatile flavor components of domesticated Codonopsis lanceolata, which were packed in woven polypropylene (WP) film or low density polyethylene (LDPE) film and stored for 15 and 30 days at refrigerated ($2{\sim}4^{\circ}C$) or room ($18{\sim}20^{\circ}C$) temperature (hereafter referred to as WP-RE-15, WP-RO-15, LDPE-RE-15, LDPE-RO-15, WP-RE-30, WP-RO-30, LDPE-RE-30 and LDPE-RO-30). 167 volatile flavor components were identified in the fresh domesticated Codonopsis lanceolata by GC/MS. The volatile flavor components which were identified in the domesticated Codonopsis lanceolata stored for 15 days were as follows ; LDPE-RE (117 components), WP-RO (65 components), WP-RE (49 components), and LDPE-RO (48 components). After 30 days, the numbers of components were as follows : LDPE-RE (99 components), WP-RO (94 components), WP-RE (46 components), and LDPE-RO (85 components). In all conditions, the following 7 volatile flavor components were identified; 1-hexadecene, 2,6-dimethyl-2-octanol, 2-methyl-2-dodecanol, ${\alpha}$-cedrene, ${\beta}-selinene$, farnesane, and isoledene. According to the sensory evaluation, the freshness of domesticated Codonopsis lanceolata was best maintained with LDPE film and under chilled conditions.

• Preventive Nutrition and Food Science
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• v.8 no.4
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• pp.306-314
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• 2003

Volatile flavor components, produced during the young (P-1), immature (P-2), mature (P-3) and old (P-4) growth stages, of shiitake mushrooms (Lentinus edodes), were extracted by simultaneous steam distillation and extraction (SDE), using a mixture of n-pentane and diethyl ether (1:1, v/v) as the extraction solvent. Analyses of the concentrates, by capillary gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS), led to the identification of 129, 129, 111 and 120 components in the P-1, 2, 3 and 4 stages, respectively. The major volatile compounds were l-octen-3-o1, 3-octanol, 3-octanone and 4-octen-3-one. Ethanol and ethyl acetate were also detected in large amounts. The characteristic volatile compounds found in shiitake mushrooms, such as dimethyl disulfide, dimethyl trisulfide and 1, 2, 4-thiolane, were at low concentrations in all samples. The amount of l-octen-3-o1 decreased as growth progressed, but concentrations of 3-octanone increased. The amount of 4-octen-3-ol decreased from P-1 to P-3, but was at a high concentrations in P-4. The concentration of 3-octanol gradually increased and reached its highest concentration in P-3, but decreased in P-4. The C8-compounds comprised 70.91, 64.09, 64.29 and 60.01 % in the P-1, 2, 3 and 4 stages, respectively, so decreased gradually with growth. The S-compounds were found in the highest concentrations in P-3.

• Korean Journal of Food Science and Technology
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• v.22 no.5
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• pp.514-519
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• 1990

Some chemical constituents were monitored to evaluate the biochemical and nutritional aspects of ${\gamma}-irradiated$ mushrooms associated with shelf-life extension. Volatile components identified by GC and GC-MS were composed primarily of 1-octen-3-ol(68%)). benzaldehyde(13%), 3-octanone(8%), benzyl alcohol(5%), 3-octanol(2%)). 1-octen-3one(1%). etc. Treatment with 2kGy-irradiation and subsequent storage for 17 days at $(9{\pm}1^{\circ}C\;and\;80{\pm}7%$ RH resulted in appreciable changes In their contents. even though negligible changes were observed in GC patterns between the nonirradiated and 2 kGy-irradiated samples. Most of the amino acids were resistant to ionizing energy of 2 kGy, while sulfur-containing free amino acids were affected significantly by ${\gamma}-irradiation$.