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- 저자 : R.C. Lindsay) (검색결과 5 건)
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Origin of Flavor Compounds in Canned Tuna and Their Relation to Quality
김무남(Mu-Nam Kim),R. C. Lindsay(R. C. Lindsay) 한국식품영양과학회 1993 한국식품영양과학회지 Vol.21 No.6
참치통조림을 개봉한후 냉장고 (4℃)에 4주간 저장하는 동안의 향기변화의 관능검사와 향기성분 분석을 하였다. 막 개봉한 참치통조림의 향은 고소한 쇠고기향과 신선한 참치통조림 특유의 냄새를 가지고 있었으나, card-boardy (1주후), 산화된 지방산(2주후, 3주후), 그리고 곰팡이냄새와 페인트 냄새(4주후)로 변하였다. 본 실험에 사용된 참치통조림시료로부터 126개이상의 휘발성성분이 분리되었고, 그중 54개의 화합물이 mass spectral data, I_E value, 그리고 GC detector로부터 나오는 efluent를 sniffing하므로서 동정되었다. 4주간 저장 후 저급휘발성 화합물은 줄어드는 반면 분자량이 큰 화합물이 새로이 생성되었다. 저장지간중 감소된화합물은 1-penten-3-ol, 3-penten-2-ol, heptanal, limonene, 1-pentanol, octanal, 1-hexanol, nonanal, 2-octanone, 2-nonanone, 1-heptanol, benzaldehyde, 그리고 methyl substituted benzene 등이었다. ρ-Thiocresol, 2-chlorophenol, 1,2-dichlorobenzene, dipropyl disulfide, 2-isobutyl-4/5-dimethylthiazole, diethyltrisulfide, 그리고 2-heptylthiophene은 신선한 참치통조림에는 검출되지 않았으나, 개봉후 4주간 저장된 통조림에서는 새로이 검출되었다. 따라서 이들 저장중에 변화된 화합물은 참치 통조림의 품질 변화의 지표로 사용할 수 있을 것으로 생각된다. The specific attributes of aroma quality of canned tuna meat were investigated before and during refrigerated storage. Fresh, cooked tuna, beefy and meaty flavor notes of canned tuna meat were changed to card-boardy (1 week storage), oxidized fat-like (2 weeks storage), fatty acid-like and heavy oxidized fat-like (3 weeks storage), and then moldy and painty (4 weeks storage) flavor notes during storage in refrigerator at 4℃. More than 126 peaks of volatile compounds collected from canned tuna meat were separated on Carbowax 20M capillary column of gas chromatographic analysis. Of the peaks, 54 compounds were identified by mass spectral data, matching I_E values, and sniffing the effluent of each peak from GC detector. The contents of many low molecular weight compounds eluted with early retention times were decreased, whereas some other new compounds eluted with longer retention time were formed during storage. The compounds increased up to 3 weeks of storage and then decreased at extended storage time (4 weeks) were 1-penten-3-ol, 3-penten-2-ol, heptanal, limonene, 1-pentanol, octanal, 1-hexanol, nonanal, 2-octanone, 2-nonanone, 1-heptanol, benzaldehyde and some methyl substituted benzenes. p-Thiocresol, 2-chlorophenol, 1, 2-dichlorobenzene, dipropyl disulfide, 2-isobutyl-4, 5-dimethylthiazole, diethyltrisulfide, and 2-heptylthiophene were formed after 4 weeks of storage, but not detected in fresh canned tuna. Therefore, these compounds could be used as indicators for the quality changes during refrigerated storage.
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Maines, Taronna R.,Lu, Xui Hua,Erb, Steven M.,Edwards, Lindsay,Guarner, Jeannette,Greer, Patricia W.,Nguyen, Doan C.,Szretter, Kristy J.,Chen, Li-Mei,Thawatsupha, Pranee,Chittaganpitch, Malinee,Waicha American Society for Microbiology 2005 Journal of virology Vol.79 No.18
<B>ABSTRACT</B><P>The spread of highly pathogenic avian influenza H5N1 viruses across Asia in 2003 and 2004 devastated domestic poultry populations and resulted in the largest and most lethal H5N1 virus outbreak in humans to date. To better understand the potential of H5N1 viruses isolated during this epizootic event to cause disease in mammals, we used the mouse and ferret models to evaluate the relative virulence of selected 2003 and 2004 H5N1 viruses representing multiple genetic and geographical groups and compared them to earlier H5N1 strains isolated from humans. Four of five human isolates tested were highly lethal for both mice and ferrets and exhibited a substantially greater level of virulence in ferrets than other H5N1 viruses isolated from humans since 1997. One human isolate and all four avian isolates tested were found to be of low virulence in either animal. The highly virulent viruses replicated to high titers in the mouse and ferret respiratory tracts and spread to multiple organs, including the brain. Rapid disease progression and high lethality rates in ferrets distinguished the highly virulent 2004 H5N1 viruses from the 1997 H5N1 viruses. A pair of viruses isolated from the same patient differed by eight amino acids, including a Lys/Glu disparity at 627 of PB2, previously identified as an H5N1 virulence factor in mice. The virus possessing Glu at 627 of PB2 exhibited only a modest decrease in virulence in mice and was highly virulent in ferrets, indicating that for this virus pair, the K627E PB2 difference did not have a prevailing effect on virulence in mice or ferrets. Our results demonstrate the general equivalence of mouse and ferret models for assessment of the virulence of 2003 and 2004 H5N1 viruses. However, the apparent enhancement of virulence of these viruses in humans in 2004 was better reflected in the ferret.</P>
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Lauren Steffel,Steven K. Howard,Edward R. Mariano,Lindsay Borg,Jody C. Leng,T. Edward Kim 대한마취통증의학회 2017 Korean Journal of Anesthesiology Vol.70 No.1
Background: New catheter-over-needle (CON) technology for continuous peripheral nerve blockade has emerged, but its effect on the risk of perineural catheter tip dislocation is unknown. Less flexible catheters may be more likely to migrate away from the nerve with simulated patient movement. In the present study, we evaluated catheter tip migration between CON catheters and traditional catheter-through-needle (CTN) catheters during ultrasound-guided short-axis in-plane (SAX-IP) insertion. Methods: We evaluated the migration of popliteal-sciatic catheters in a prone, unembalmed male cadaver. Thirty catheter placement trials were divided randomly into two groups based on the catheter type: CON or CTN. A single anesthesiology resident placed the catheters by SAX-IP insertion, and the catheters were then examined by ultrasound before and after ipsilateral knee range of motion (ROM) exercises (0o–130o flexion). A blinded expert regional anesthesiologist performed caliper measurements on the ultrasound images before and after the ROM exercises. The primary outcome was the change in distance from the catheter tip to the center of the nerve (cm) between before and after the ROM exercises. Results: The change in the tip-to-nerve distance (median [10th–90th percentile]) was 0.06 (−0.16 to 0.23) cm for the CTN catheter and 0.00 (−0.12 to 0.69) for the CON catheter (P = 0.663). However, there was a statistically significant increase in dislocation out of the nerve compartment for the CON catheter (4/15; 0/15 for CTN) (P = 0.043). Conclusions: Although the use of different catheter designs had no effect on the change in the measured migration distance of popliteal-sciatic catheters, 27% of the CON catheters were dislocated out of the nerve compartment. These results may influence the choice of catheter design when using SAX-IP perineural catheter insertion.
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